Some standard content:
GB18173.1—2000
Chapter 4 and Chapter 7 of this standard are mandatory, and the rest are recommended. This standard is equivalent to the Japanese JISA6008-1997 "Synthetic Polymer Series Roof Waterproof Sheet" standard, and refers to relevant domestic national standards and industry standards. Compared with the Japanese standard, the technical content of this standard has added water-impermeability and low-temperature bending items, and relatively increased the ozone test concentration, so as to reflect the performance of the sheet. This standard classifies the polymer waterproof sheets commonly used in the industry, and specifies the performance indicators of each type of sheet, which is basically consistent with the relevant standards. This standard is the first part of the "Polymer Waterproof Material" standard, the second part is the water stop, and the third part is the expansion rubber. Appendix A, Appendix B, and Appendix C of this standard are the appendices of the standard, and Appendix D is the appendix of the reminder. From the date of implementation of this standard, the original chemical industry standards HG/T2402—1992 and HG/T2449—-1993 will be abolished at the same time. This standard was proposed by the State Administration of Petroleum and Chemical Industry. This standard is under the jurisdiction of the Rubber Miscellaneous Products Technical Committee of the National Rubber Standardization Committee. This standard was drafted by Beijing Rubber Products Design and Research Institute, and Beijing Oakland Building Waterproof Materials Co., Ltd., Changshu Sanheng Building Materials Co., Ltd., Shenyang Xingchen Chemical Co., Ltd., Baoding No. 1 Rubber Factory, Heilongjiang Suileng No. 2 Plastic Co., Ltd., Jinan Fangxin Group Co., Ltd., Shandong Tengzhou Rubber and Plastic Group Co., Ltd., Baotou Yuzhi Building Waterproof Materials Co., Ltd., Liaoyang Rubber Factory No. 1, Hangzhou Shunfan Chemical Co., Ltd., Beijing Rubber and Plastic Products Factory, Beijing Rubber Factory No. 1, Shanghai Nanhui Special Rubber Factory, Tianjin Rubber Industry Research Institute and other units participated in the drafting.
The main drafters of this standard are: Zhang Suying, Liu Bing, Li Jiahao, Meng Zhiqiang, Sun Xiaodong, Yu Mingrui, and Sun Yan'an. 152
1 Scope
National Standard of the People's Republic of China
Polymer water-proof materials
Part 1 Sheet
Polymer water-proof materialsPart 1: Water-proof sheet
GB 18173. 1--2000
This standard specifies the classification, product marking, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of polymer waterproof sheet materials. It is applicable to homogeneous sheets (hereinafter referred to as homogeneous sheets) made of polymer materials as the main material and produced by calendaring or extrusion, and composite sheets (hereinafter referred to as composite sheets) composited with polymer materials (including with fabric reinforcement layers). It is mainly used for waterproofing of building roofs and underground projects.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard was published, the versions shown were all valid. All standards are subject to revision and parties using this standard should investigate the possibility of using the most recent versions of the following standards. GB/T528--1998 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber (egvISO37:1994) GB/T529-1999 Determination of tear strength of vulcanized rubber or thermoplastic rubber (trouser-shaped, right-angled and crescent-shaped test specimens) (eqvISO 34:1994)
GB/T1690-1992 Test method for liquid resistance of vulcanized rubber (neqISO1817:1985) GB/T3512-1989 Rubber hot air aging test method (neqISO188:1976) GB/T7762-1987 Ozone aging resistance test for vulcanized rubber Static tensile test method (neqISO1431-1:1980) GB/T9865.11996 Preparation of samples and test specimens of vulcanized rubber or thermoplastic rubber Part: Physical tests (idt ISO 4661-1:1993)
GB/T 12831—-1991
GB/T 12952--1991
GB/T 12953—1991
3 Classification and product marking
Artificial climate (xenon lamp) aging test method for vulcanized rubber (neqISO4665-3:1987) Polyvinyl fluoride waterproof membrane
Fluorinated polyethylene waterproof membrane
3.1 The classification of sheets is shown in Table 1.
Approved by the State Administration of Quality and Technical Supervision on July 31, 2000 and implemented on March 1, 2001
Homogeneous sheet
Composite sheet
Vulcanized rubber
Non-vulcanized rubber
Resin
Vulcanized rubber
Non-vulcanized rubber
Resin
3.2 Product marking
GB 18173. 1--2000
Table 1 Classification of sheet materials
EPDM rubber
Rubber (rubber and plastic) blends
Main raw materials
Chloroprene rubber, chlorosulfonated polyethylene, chlorinated polyethylene, etc. Recycled rubber
EPDM rubber
Rubber and plastic blends
Chlorinated polyethylene
Polyvinyl chloride, etc.
Ethylene vinyl acetate, polyethylene, etc.
Ethylene vinyl acetate modified asphalt blends, etc.
EPDM, butyl, chloroprene rubber, chlorosulfonated polyethylene, etc. Chlorinated polyethylene, EPDM, butyl, chloroprene rubber, chlorosulfonated thallium, etc. Chlorinated vinyl chloride, etc.
Polyethylene, etc.
3.2.1 Products should be marked in the following order, and marking content can be added as needed: type code, material (abbreviation or code), specification (length×width×thickness). 3.2.2 Marking example
Homogeneous vulcanized ethylene propylene diene monomer rubber (EPDM) sheet with a length of 20000 mm, a width of 1000 mm and a thickness of 1.2 mm is marked as:
JL1-EPDM-20 000 mmX1 000 mm X1. 2 mm4 Technical requirements
4.1 Specifications of sheets
The specifications and allowable deviations of the sheets are shown in Tables 2 and 3. Special specifications shall be agreed upon by the supply and demand parties. Table 2 Specifications of sheet materials
Rubber
Resin
Thickness, mm
1.0,1.2,1, 5,1.8,2. 0
0.5 and above
Width, m
1.0,1.1,1.2
1.0,1.2.1. 5,2. 0
Length, m
20 and above
Note: Rubber sheets are allowed to have one joint in each roll of 20m, and the minimum piece length should not be less than 3m, and should be extended by 15cm for overlap; resin sheets are not allowed to have joints in each roll of at least 20m Table 3 Allowable deviation
Allowable deviation, %
-10~+15
Negative values are not allowed
4.2 Appearance quality of sheets
4.2.1 The surface of the sheet should be flat and the edges should be neat, without cracks, mechanical damage, folds, perforations, abnormal adhesion parts and other defects that affect the use.
4.2.2 The surface defects of the sheet should meet the following requirements without affecting the use. a) Dents, the depth shall not exceed 30% of the sheet thickness; resin sheets shall not exceed 5%; b) Impurities, the depth shall not exceed 9mm2 per 1m2; 154
GB 18173. 12000
c) Bubbles, the depth shall not exceed 30% of the sheet thickness and shall not exceed 7mm per 1m2, but resin sheets are not allowed. 4.3 Physical properties of sheets
4.3.1 The properties of homogeneous sheets shall comply with the provisions of Table 4; the properties of composite sheets shall comply with the provisions of Table 5, with the elongation at break being the elongation at break.
The properties of the sheets in both the horizontal and vertical directions shall comply with the provisions of 4.3.1. For composite sheets with fabric reinforcement layers, when the thickness of the main material is less than 0.8mm, the elongation at break shall not be assessed. The properties of sheets with a thickness less than 0.8mm are allowed to reach more than 80% of the specified properties. 4.3.4
Table 4 Physical properties of homogeneous sheets
Tensile strength at break
Elongation at break, %
Tear strength, kN/m
Vulcanized rubber
Non-vulcanized rubber
Resin
Applicable test
. 3MPa10. 3MPa10. 2MPa10. 2MPa10. 3MPa10. 2MPa10. 3MPa10. 3MPaWater impermeability1],30min no leakage
Low temperature bending", ℃
Shrinkage, mm Shrinkage
Tensile strength at break
Retention rate, %≥
Hot air aging
(80℃×
Alkali resistance
[10%Ca
Retention rate of elongation at break, %
100% elongation
Tensile strength at break
Retention rate, %
No crack
No crackNo crackNo crackNo crackNo crack80
(OH), Retention rate of elongation at break at room temperature, %
X168 hl
Elongation
40%,500pphm
Oxygen presbyopic flower 3
(40℃×
168 h)
Elongation
20%.500pphm
Elongation
20%.200pphm
Elongation
20%,100pphm
Instructions for use:
17 Japanese standard does not have this item.
2] Japanese standard does not have this item.
No crack
No crack 3 The Japanese standard stipulates that the concentration of ozone is 75Pphm. 80
No crack
No crack
No crack
No crack
No crackNo crack
No crackNo crack
Tensile strength at break
Retention rate, % ≥
Artificial weathering
Adhesion properties
Retention rate of elongation at break, %
GB 18173.1—2000
Table 4 (Complete)
Vulcanized rubber
Except for 100% elongation
No crack||No crack
No treatment
Heat treatment
Alkali treatment
Non-vulcanized rubber
No crack
No crack
No crack
Resin
No crackNo crackNo crackNo crackNo crack
No crack
Deviation from the reference line and peeling length within 5 mm or less, and without harmful offset and abnormal points Note: Artificial weathering and bonding performance items are recommended items Table 5 Physical properties of composite sheets
Tensile strength at break
Elongation at break of glue, %
Tear strength, N
-20℃
Waterproofness 1, 30min no leakage
Low temperature bending, ℃
Heating expansion, mm
Hot air aging
(80℃×168 h)
Retention rate of tensile strength at break, %≥
Retention rate of elongation at break of glue, %
Retention rate of tensile strength at break, % ≥
Alkali resistance [10%Ca(OH),|
Normal temperature×168h]
Retention rate of elongation at break, %
Oxygen aging 3 (40℃×168h), 200pphm tensile strength at break retention rate, %≥
Artificial weathering
Instructions for use:
Retention rate of elongation at break, %
1]This item is not available in Japanese standards.
27This item is not available in Japanese standards.
3]The ozone concentration is specified as 75pphm in Japanese standards. 156
Vulcanized rubber
No crack
Non-vulcanized rubber
No crack
Resin
No crack
No crack
Applicable test
Applicable test
Adhesion performance
No treatment
Heat treatment
Alkali treatment
GB 18173. 1--2000
Table 5 (End)
Vulcanized rubber
Non-vulcanized rubber
Resin
Deviation from the reference line and peeling length within 5 mm or less, and without harmful deviation and abnormal points
Note: Artificial weathering and bonding performance items are recommended items. Composite sheets with fabric reinforcement layers are not subject to bonding performance test.
4.4 Waterproof sheets (rolls) with polyvinyl chloride or chlorinated polyethylene resin as the only main raw material shall be implemented in accordance with GB/T12952 or GB/T12953 standards.
5 Test method
5.1 Determination of sheet size
5.1.1 Length and width are measured with a steel tape measure, accurate to 1 mm. The width is measured at three points at both ends and near the center in the longitudinal direction, and the average value is taken; the length is measured at the shortest part of the full length of each roll after flattening. 5.1.2 The thickness is measured by a thickness gauge with a graduation of 1/100 mm, a pressure of (225) kPa, and a foot diameter of not less than 6 mm. The measuring points are shown in Figure 1. Cut off 300 mm from the end, and then take two points (a and b) from the 20 mm inside of the cut and within the range of 10% of the width of both sides in the width direction. Then divide the ab interval into four equal parts and take the equal parts (c, d, e) to measure the thickness. The measurement result is expressed as the average value of the five points. If the width is less than 500 mm, the measurement of points c and d can be omitted. Unit: mm
Cut-off line
10% of the width
Center line of the product width
End of the product
A and b are divided into four equal parts
10% of the width
Figure 1 Schematic diagram of thickness measurement points
5.2 The appearance quality of the sheet is inspected by visual inspection and measuring tools. 5.3 Determination of physical properties of sheets
5.3.1 Preparation of test specimens
Cut a specimen of sufficient length for the test from the product after the size has been determined. After flattening, let it stand for 24 hours under standard conditions and then cut the test piece as shown in Figure 2 and Table 6; when cutting composite sheets, follow the fabric grain, try not to damage the fibers and ensure that the working part has the maximum number of fibers.
Waterproofness
Tensile properties
Tear strength
Bending at low temperature
Expansion and contraction under heating
GB 18173. 1—2000
Figure 2 Schematic diagram of sample cutting
Table 6 Shape and number of test specimens
Test specimen code
Test specimen shape
Unit: mm
140 mmX140 mm
GB528 Type I bell piece
GB528 Type I dumb age piece
GB528 Type I sleeping bell piece
GB529 Right angle test piece
120 mmX50 mm
300 mmX30mm
Hot air aging
Alkali resistance
Olfon aging
Artificial weathering
Adhesion properties
Tensile properties
Elongation appearance
Tensile properties
Elongation appearance
No treatment
Heat treatmentwwW.bzxz.Net
Alkali treatment
GB 18173. 1—2000
Table 6 (End)
Specimen code
In the specimen code, the one with “\” above the letter is a transverse specimen. Adhesion performance test specimens can also be cut into 150mm×25mm2
Test specimen shape
GB528 medium I dumbbell piece
GB528 medium I dumbbell piece
GB528 medium warm bell piece
GB528 medium 1 bell piece
GB528 medium I warm bell piece
GB528 medium I warm bell piece
150 mmX105 mm
5.3.2 The tensile strength at break and elongation at break of the sheet shall be carried out in accordance with the provisions of GB/T528, and three specimens shall be tested and the median value shall be taken. Among them, the tensile strength at break shall be calculated according to formula (1) and formula (2), accurate to 0.1 MPa; the elongation at break shall be calculated according to formula (3) and formula (4). TSt-F./Wt
Where: TS-Tensile strength at break of homogeneous piece, MPaFb-Force recorded when the specimen breaks, N,
Width of the narrow parallel part of the dumbbell specimen, mm, thickness of the test length part, mm.
TS,- Fs/W
Where: TSb-Tensile strength at break of composite piece, N/cm, Fb
Where: E
-Force recorded when the reinforcing cloth breaks,N
Width of the narrow parallel part of the dumbbell test piece, cm. E = 100(L - L)/L
Elongation at break of homogeneous sheet at room temperature, %;
Gauge length at break of L specimen, mm;
Initial gauge length of specimen, mm.
Eb 100(L:/L)
Elongation at break of composite sheet and low temperature homogeneous sheet, %; Where, Eb-—
Displacement of the gripper interval at break of the rubber, mm: L -
Initial gripper interval of the specimen (50mm for type I specimen, 30mm for type I specimen). (1)
(2)
(3)
5.3.2.1 For tensile test, use type 1 specimen. For high and low temperature test, if type I specimen is not applicable, type 1 specimen can be used. Preheat or precool the specimen at the specified temperature for 1 h.
5.3.2.2 The moving speed of the specimen holder: (500±50) mm/min for rubber and (250±50) mm/min for resin. For tensile test of composite sheet, the specimen shall be stretched at a stretching speed of 25 mm/min until the reinforcing layer breaks, and then continue to stretch at the speed specified in 5.3.2.3
5.3.2.2 until the specimen breaks completely. 5.3.3 The tear strength test of sheet shall be carried out according to the uncut right-angle specimen in GB/T529, and the stretching speed shall be the same as 5.3.2.2; the maximum force when the composite sheet is stretched to break shall be its tear strength. 159
GB 18173. 1--2000
5.3.4 The water-impermeability test of the sheet material adopts the cross-shaped pressure plate shown in Figure 3. During the test, the sample is installed according to the operating procedures of the water permeability tester, and the pressure is increased to the specified pressure at one time. After maintaining it for 30 minutes, observe whether the sample has leakage; it is qualified if all three samples have no leakage. Unit: mm
Figure 3 Schematic diagram of the pressure plate of the water permeability tester
5.3.5 The low-temperature bending test of the sheet material shall be carried out in accordance with Appendix A (Appendix of the standard). 5.3.6 The heating expansion test of the sheet material shall be carried out in accordance with Appendix B (Appendix of the standard). 5.3.7 The hot air aging test of the sheet material shall be carried out in accordance with the provisions of GB/T3512. 5.3.8 The hot air aging elongation test of the sheet material shall be carried out in accordance with Appendix C (Appendix of the standard). 5.3.9 The alkali resistance test of the sheet shall be carried out in accordance with the provisions of GB/T 1690. Before the test, the composite sheet shall be edge-sealed by an appropriate method. 5.3.10 The ozone aging test of the sheet shall be carried out in accordance with the provisions of GB/T7762. The sheet is qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.11 The artificial weathering performance of the sheet shall be carried out in accordance with the provisions of GB/T12831: the blackboard temperature is (63±3)℃, the relative humidity is (50±5)%, the rainfall cycle is 120min, of which the rainfall is 18min, the interval drying is 102min, and the total radiation is 495MJ/m2 (or the radiation intensity is 550W/m2, and the test time is 250h). After the sample is treated with radiant light, it is parked under standard conditions for 4h, and the performance is measured. The appearance inspection is qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.12 The bonding performance test of the sheet shall be carried out in accordance with Appendix D (Suggested Appendix). 6 Inspection rules
6.1 Inspection classification
6.1.1 Factory inspection
6.1.1.1 Batching and sampling
Take 5.000m2 sheets of the same variety and specification (8000m2 if the daily output exceeds 8000m) as a batch, randomly select 3 rolls for size and appearance quality inspection, and randomly select sufficient samples from the samples that pass the above inspection for physical property inspection. 6.1.1.2 Inspection items
Factory inspection should be carried out on the size, appearance quality, tensile strength at room temperature, elongation at break at room temperature, tear strength, low-temperature bending, and impermeability of the sheets batch by batch.
6.1.2 Type inspection
All technical indicators listed in this standard are type inspection items, and type inspection should usually be carried out in one of the following situations. 160
a) Trial and approval of new products;
GB 18173. 1-2000
b) Significant changes in product structure, design, process, materials, production equipment, management, etc.;c) Change of production, transfer to another factory, or resumption of production after long-term suspension (more than 6 months);d) Contractual provisions;
e) There is a significant difference between the results of the factory inspection and the last type inspection;f) Arbitration inspection or the national quality supervision and inspection agency’s request for the test. Under normal circumstances, ozone aging should be inspected at least once a year, and the rest of the items should be inspected once every six months; artificial weathering is carried out according to user requirements.
6.2 Judgment rules
If all indicators of specifications, dimensions, appearance quality and physical properties meet the technical requirements, the product is qualified. If one of the physical performance indicators does not meet the technical requirements, double samples should be taken for retest. If the retest result is still unqualified, the batch of products is unqualified. 7 Marking, packaging, transportation, purchase and storage
7.1 The sheets are packed with hard core rolls and the outer packaging is packed with suitable materials. 7.2 Each independent package should have a certificate of conformity and indicate the product name, product mark, trademark, manufacturer's name and address, production date, and product standard number.
7.3 When transporting and storing sheets, care should be taken not to damage the packaging. Place them in a ventilated and dry place. The storage stack height should not exceed the height of five flat sheet rolls. When stacking, a flat board should be used as a cushion, 20 cm from the ground, and direct sunlight should be avoided. Contact with acids, alkalis, oils and organic solvents is prohibited, and heat sources should be isolated.
7.4 Under the conditions specified in 7.3, the product performance should comply with the provisions of this standard within a storage period of no more than one year from the date of production.
A1 Test apparatus
GB18173.1—2000
Appendix A
(Standard Appendix)
Low-temperature bending test
The low-temperature bending instrument shall consist of a low-temperature box and a bending plate. The low-temperature box shall be able to automatically adjust between 0 and 40°C, with an error of ±2°C, and shall be able to keep the sample at a constant temperature during operation; the bending plate shall consist of a metal plate, a rotating shaft and a spacing screw, and the spacing between the plates can be adjusted arbitrarily. The schematic diagram is shown in Figure A1.
A2 Test conditions
The storage time of the sample and the test temperature shall comply with the following requirements: A2.1 From sample preparation to test, the time is 24h. A2.2 The temperature of the test room shall be controlled within the range of (23±2)°C. A3 Test Procedure
A3.1 Bend the specimen prepared in accordance with 5.3.1 by 180°, so that the edges of the 50mm wide specimen overlap and are flush, and fix the edges with a positioning clamp or a 10mm wide tape to ensure that they do not misalign during the test; and adjust the distance between the two plates of the bending instrument to three times the thickness of the sheet. A3.2 Open the upper plate of the bending instrument, and place two specimens of the same thickness flat on the bottom plate, with the overlapping side facing the axis and 20mm away from the axis; keep it at the specified temperature for 1h, then quickly press down the upper plate to reach the adjusted spacing position, and take out the specimen after keeping it for 1s. After returning to room temperature, observe whether the specimen is broken at the bend, or use a magnifying glass to observe whether there is a crack on the tensile surface of the specimen at the bend. A4 Judgment
Observe the surface of the specimen with an 8x magnifying glass, and both specimens are qualified if there is no crack. Schematic diagram of bending plate
Testing instrument
GB 18173. 1--2000
Appendix B
(Appendix of the standard)
Heating expansion test
The scale accuracy of the expansion is not less than 0.5mm. B1.2 Aging test chamber.
Test conditions
The storage time of the sample and the test temperature shall meet the following requirements: B2.1 From sample preparation to test, the time is 24h. B2.2 The test chamber temperature is controlled within the range of (23±2)℃. B3 Test procedure
Put the sample prepared according to the specifications and dimensions of Figure B1 into the aging chamber at (80±2)℃ for 168h; after taking out the sample, place it for 1h, measure the length of the sample with a measuring tool, and calculate the expansion based on the initial length. According to the vertical and horizontal directions, the expansion is expressed by the average value of three samples respectively.
Note: If the test piece is bent, it is necessary to apply an appropriate weight to flatten it for measurement. Unit: mm
C1 Test apparatus
C1.1 Aging test chamber.
Figure B1 Schematic diagram of measurement method
Appendix C
(Standard Appendix)
Hot air aging elongation test
The specimen fixture should be able to stretch the distance between the specimen markings to 100% elongation. C1.2/L)
Elongation at break of composite sheet and low temperature homogeneous sheet, %; Where, Eb--
Displacement of the gripper interval when the rubber breaks, mm: L -
Initial gripper interval of the specimen (50mm for type I specimen, 30mm for type I specimen). (1)
(2)
(3)
5.3.2.1 Type 1 specimens are used for tensile test. For high and low temperature tests, if type I specimens are not applicable, type 1 specimens can be used. The specimens are preheated or precooled at the specified temperature for 1 h.
5.3.2.2 Movement speed of the specimen gripper: (500±50) mm/min for rubber and (250±50) mm/min for resin. The tensile test of the composite sheet should first be conducted by stretching the specimen at a tensile speed of 25 mm/min until the reinforcement layer breaks, and then continue to stretch at the speed specified in 5.3.2. 3
5.3.2.2 until the specimen breaks completely. 5.3.3 The tear strength test of the sheet material shall be carried out according to the uncut rectangular specimen in GB/T529, and the tensile speed shall be the same as 5.3.2.2; the maximum force when the composite sheet is stretched to break shall be its tear strength. 159
GB 18173. 1--2000
5.3.4 The water-impermeability test of the sheet material shall adopt the cross-shaped pressure plate shown in Figure 3. During the test, the specimen shall be installed according to the operating procedures of the water permeability instrument, and the pressure shall be increased to the specified pressure at one time. After maintaining it for 30 minutes, observe whether the specimen has leakage; it shall be qualified if all three specimens have no leakage. Unit: mm
Figure 3 Schematic diagram of water permeability tester pressure plate
5.3.5 The low temperature bending test of the sheet shall be carried out in accordance with Appendix A (Appendix of the standard). 5.3.6 The heating expansion test of the sheet shall be carried out in accordance with Appendix B (Appendix of the standard). 5.3.7 The hot air aging test of the sheet shall be carried out in accordance with the provisions of GB/T3512. 5.3.8 The hot air aging elongation test of the sheet shall be carried out in accordance with Appendix C (Appendix of the standard). 5.3. 9 The alkali resistance test of the sheet shall be carried out in accordance with the provisions of GB/T 1690. Before the test, the composite sheet shall be edge-sealed by appropriate methods. 5.3.10 The ozone aging test of the sheet shall be carried out in accordance with the provisions of GB/T7762, and the sheet shall be qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.11 The artificial weathering performance of the sheet shall be carried out in accordance with the provisions of GB/T12831: the blackboard temperature is (63±3)℃, the relative humidity is (50±5)%, the rainfall cycle is 120min, of which the rainfall is 18min, the interval drying is 102min, and the total radiation is 495MJ/m2 (or the radiation intensity is 550W/m2, and the test time is 250h). After the sample is treated with ozone, it is parked under standard conditions for 4h, and the performance is measured. The appearance inspection is qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.12 The bonding performance test of the sheet shall be carried out in accordance with Appendix D (Suggested Appendix). 6 Inspection rules
6.1 Inspection classification
6.1.1 Factory inspection
6.1.1.1 Batching and sampling
Take 5.000m2 sheets of the same variety and specification (8000m2 if the daily output exceeds 8000m) as a batch, randomly select 3 rolls for size and appearance quality inspection, and randomly select sufficient samples from the samples that pass the above inspection for physical property inspection. 6.1.1.2 Inspection items
Factory inspection should be carried out on the size, appearance quality, tensile strength at room temperature, elongation at break at room temperature, tear strength, low-temperature bending, and impermeability of the sheets batch by batch.
6.1.2 Type inspection
All technical indicators listed in this standard are type inspection items, and type inspection should usually be carried out in one of the following situations. 160
a) Trial and approval of new products;
GB 18173. 1-2000
b) Significant changes in product structure, design, process, materials, production equipment, management, etc.;c) Change of production, transfer to another factory, or resumption of production after long-term suspension (more than 6 months);d) Contractual provisions;
e) There is a significant difference between the results of the factory inspection and the last type inspection;f) Arbitration inspection or the national quality supervision and inspection agency’s request for the test. Under normal circumstances, ozone aging should be inspected at least once a year, and the rest of the items should be inspected once every six months; artificial weathering is carried out according to user requirements.
6.2 Judgment rules
If all indicators of specifications, dimensions, appearance quality and physical properties meet the technical requirements, the product is qualified. If one of the physical performance indicators does not meet the technical requirements, double samples should be taken for retest. If the retest result is still unqualified, the batch of products is unqualified. 7 Marking, packaging, transportation, purchase and storage
7.1 The sheets are packed with hard core rolls and the outer packaging is packed with suitable materials. 7.2 Each independent package should have a certificate of conformity and indicate the product name, product mark, trademark, manufacturer's name and address, production date, and product standard number.
7.3 When transporting and storing sheets, care should be taken not to damage the packaging. Place them in a ventilated and dry place. The storage stack height should not exceed the height of five flat sheet rolls. When stacking, a flat board should be used as a cushion, 20 cm from the ground, and direct sunlight should be avoided. Contact with acids, alkalis, oils and organic solvents is prohibited, and heat sources should be isolated.
7.4 Under the conditions specified in 7.3, the product performance should comply with the provisions of this standard within a storage period of no more than one year from the date of production.
A1 Test apparatus
GB18173.1—2000
Appendix A
(Standard Appendix)
Low-temperature bending test
The low-temperature bending instrument shall consist of a low-temperature box and a bending plate. The low-temperature box shall be able to automatically adjust between 0 and 40°C, with an error of ±2°C, and shall be able to keep the sample at a constant temperature during operation; the bending plate shall consist of a metal plate, a rotating shaft and a spacing screw, and the spacing between the plates can be adjusted arbitrarily. The schematic diagram is shown in Figure A1.
A2 Test conditions
The storage time of the sample and the test temperature shall comply with the following requirements: A2.1 From sample preparation to test, the time is 24h. A2.2 The temperature of the test room shall be controlled within the range of (23±2)°C. A3 Test Procedure
A3.1 Bend the specimen prepared in accordance with 5.3.1 by 180°, so that the edges of the 50mm wide specimen overlap and are flush, and fix the edges with a positioning clamp or a 10mm wide tape to ensure that they do not misalign during the test; and adjust the distance between the two plates of the bending instrument to three times the thickness of the sheet. A3.2 Open the upper plate of the bending instrument, and place two specimens of the same thickness flat on the bottom plate, with the overlapping side facing the axis and 20mm away from the axis; keep it at the specified temperature for 1h, then quickly press down the upper plate to reach the adjusted spacing position, and take out the specimen after keeping it for 1s. After returning to room temperature, observe whether the specimen is broken at the bend, or use a magnifying glass to observe whether there is a crack on the tensile surface of the specimen at the bend. A4 Judgment
Observe the surface of the specimen with an 8x magnifying glass, and both specimens are qualified if there is no crack. Schematic diagram of bending plate
Testing instrument
GB 18173. 1--2000
Appendix B
(Appendix of the standard)
Heating expansion test
The scale accuracy of the expansion is not less than 0.5mm. B1.2 Aging test chamber.
Test conditions
The storage time of the sample and the test temperature shall meet the following requirements: B2.1 From sample preparation to test, the time is 24h. B2.2 The test chamber temperature is controlled within the range of (23±2)℃. B3 Test procedure
Put the sample prepared according to the specifications and dimensions of Figure B1 into the aging chamber at (80±2)℃ for 168h; after taking out the sample, place it for 1h, measure the length of the sample with a measuring tool, and calculate the expansion based on the initial length. According to the vertical and horizontal directions, the expansion is expressed by the average value of three samples respectively.
Note: If the test piece is bent, it is necessary to apply an appropriate weight to flatten it for measurement. Unit: mm
C1 Test apparatus
C1.1 Aging test chamber.
Figure B1 Schematic diagram of measurement method
Appendix C
(Standard Appendix)
Hot air aging elongation test
The specimen fixture should be able to stretch the distance between the specimen markings to 100% elongation. C1.2/L)
Elongation at break of composite sheet and low temperature homogeneous sheet, %; Where, Eb--
Displacement of the gripper interval when the rubber breaks, mm: L -
Initial gripper interval of the specimen (50mm for type I specimen, 30mm for type I specimen). (1)
(2)
(3)
5.3.2.1 Type 1 specimens are used for tensile test. For high and low temperature tests, if type I specimens are not applicable, type 1 specimens can be used. The specimens are preheated or precooled at the specified temperature for 1 h.
5.3.2.2 Movement speed of the specimen gripper: (500±50) mm/min for rubber and (250±50) mm/min for resin. The tensile test of the composite sheet should first be conducted by stretching the specimen at a tensile speed of 25 mm/min until the reinforcement layer breaks, and then continue to stretch at the speed specified in 5.3.2. 3
5.3.2.2 until the specimen breaks completely. 5.3.3 The tear strength test of the sheet material shall be carried out according to the uncut rectangular specimen in GB/T529, and the tensile speed shall be the same as 5.3.2.2; the maximum force when the composite sheet is stretched to break shall be its tear strength. 159
GB 18173. 1--2000
5.3.4 The water-impermeability test of the sheet material shall adopt the cross-shaped pressure plate shown in Figure 3. During the test, the specimen shall be installed according to the operating procedures of the water permeability instrument, and the pressure shall be increased to the specified pressure at one time. After maintaining it for 30 minutes, observe whether the specimen has leakage; it shall be qualified if all three specimens have no leakage. Unit: mm
Figure 3 Schematic diagram of water permeability tester pressure plate
5.3.5 The low temperature bending test of the sheet shall be carried out in accordance with Appendix A (Appendix of the standard). 5.3.6 The heating expansion test of the sheet shall be carried out in accordance with Appendix B (Appendix of the standard). 5.3.7 The hot air aging test of the sheet shall be carried out in accordance with the provisions of GB/T3512. 5.3.8 The hot air aging elongation test of the sheet shall be carried out in accordance with Appendix C (Appendix of the standard). 5.3. 9 The alkali resistance test of the sheet shall be carried out in accordance with the provisions of GB/T 1690. Before the test, the composite sheet shall be edge-sealed by appropriate methods. 5.3.10 The ozone aging test of the sheet shall be carried out in accordance with the provisions of GB/T7762, and the sheet shall be qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.11 The artificial weathering performance of the sheet shall be carried out in accordance with the provisions of GB/T12831: the blackboard temperature is (63±3)℃, the relative humidity is (50±5)%, the rainfall cycle is 120min, of which the rainfall is 18min, the interval drying is 102min, and the total radiation is 495MJ/m2 (or the radiation intensity is 550W/m2, and the test time is 250h). After the sample is treated with ozone, it is parked under standard conditions for 4h, and the performance is measured. The appearance inspection is qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.12 The bonding performance test of the sheet shall be carried out in accordance with Appendix D (Suggested Appendix). 6 Inspection rules
6.1 Inspection classification
6.1.1 Factory inspection
6.1.1.1 Batching and sampling
Take 5.000m2 sheets of the same variety and specification (8000m2 if the daily output exceeds 8000m) as a batch, randomly select 3 rolls for size and appearance quality inspection, and randomly select sufficient samples from the samples that pass the above inspection for physical property inspection. 6.1.1.2 Inspection items
Factory inspection should be carried out on the size, appearance quality, tensile strength at room temperature, elongation at break at room temperature, tear strength, low-temperature bending, and impermeability of the sheets batch by batch.
6.1.2 Type inspection
All technical indicators listed in this standard are type inspection items, and type inspection should usually be carried out in one of the following situations. 160
a) Trial and approval of new products;
GB 18173. 1-2000
b) Significant changes in product structure, design, process, materials, production equipment, management, etc.;c) Change of production, transfer to another factory, or resumption of production after long-term suspension (more than 6 months);d) Contractual provisions;
e) There is a significant difference between the results of the factory inspection and the last type inspection;f) Arbitration inspection or the national quality supervision and inspection agency’s request for the test. Under normal circumstances, ozone aging should be inspected at least once a year, and the rest of the items should be inspected once every six months; artificial weathering is carried out according to user requirements.
6.2 Judgment rules
If all indicators of specifications, dimensions, appearance quality and physical properties meet the technical requirements, the product is qualified. If one of the physical performance indicators does not meet the technical requirements, double samples should be taken for retest. If the retest result is still unqualified, the batch of products is unqualified. 7 Marking, packaging, transportation, purchase and storage
7.1 The sheets are packed with hard core rolls and the outer packaging is packed with suitable materials. 7.2 Each independent package should have a certificate of conformity and indicate the product name, product mark, trademark, manufacturer's name and address, production date, and product standard number.
7.3 When transporting and storing sheets, care should be taken not to damage the packaging. Place them in a ventilated and dry place. The storage stack height should not exceed the height of five flat sheet rolls. When stacking, a flat board should be used as a cushion, 20 cm from the ground, and direct sunlight should be avoided. Contact with acids, alkalis, oils and organic solvents is prohibited, and heat sources should be isolated.
7.4 Under the conditions specified in 7.3, the product performance should comply with the provisions of this standard within a storage period of no more than one year from the date of production.
A1 Test apparatus
GB18173.1—2000
Appendix A
(Standard Appendix)
Low-temperature bending test
The low-temperature bending instrument shall consist of a low-temperature box and a bending plate. The low-temperature box shall be able to automatically adjust between 0 and 40°C, with an error of ±2°C, and shall be able to keep the sample at a constant temperature during operation; the bending plate shall consist of a metal plate, a rotating shaft and a spacing screw, and the spacing between the plates can be adjusted arbitrarily. The schematic diagram is shown in Figure A1.
A2 Test conditions
The storage time of the sample and the test temperature shall comply with the following requirements: A2.1 From sample preparation to test, the time is 24h. A2.2 The temperature of the test room shall be controlled within the range of (23±2)°C. A3 Test Procedure
A3.1 Bend the specimen prepared in accordance with 5.3.1 by 180°, so that the edges of the 50mm wide specimen overlap and are flush, and fix the edges with a positioning clamp or a 10mm wide tape to ensure that they do not misalign during the test; and adjust the distance between the two plates of the bending instrument to three times the thickness of the sheet. A3.2 Open the upper plate of the bending instrument, and place two specimens of the same thickness flat on the bottom plate, with the overlapping side facing the axis and 20mm away from the axis; keep it at the specified temperature for 1h, then quickly press down the upper plate to reach the adjusted spacing position, and take out the specimen after keeping it for 1s. After returning to room temperature, observe whether the specimen is broken at the bend, or use a magnifying glass to observe whether there is a crack on the tensile surface of the specimen at the bend. A4 Judgment
Observe the surface of the specimen with an 8x magnifying glass, and both specimens are qualified if there is no crack. Schematic diagram of bending plate
Testing instrument
GB 18173. 1--2000
Appendix B
(Appendix of the standard)
Heating expansion test
The scale accuracy of the expansion is not less than 0.5mm. B1.2 Aging test chamber.
Test conditions
The storage time of the sample and the test temperature shall meet the following requirements: B2.1 From sample preparation to test, the time is 24h. B2.2 The test chamber temperature is controlled within the range of (23±2)℃. B3 Test procedure
Put the sample prepared according to the specifications and dimensions of Figure B1 into the aging chamber at (80±2)℃ for 168h; after taking out the sample, place it for 1h, measure the length of the sample with a measuring tool, and calculate the expansion based on the initial length. According to the vertical and horizontal directions, the expansion is expressed by the average value of three samples respectively.
Note: If the test piece is bent, it is necessary to apply an appropriate weight to flatten it for measurement. Unit: mm
C1 Test apparatus
C1.1 Aging test chamber.
Figure B1 Schematic diagram of measurement method
Appendix C
(Standard Appendix)
Hot air aging elongation test
The specimen fixture should be able to stretch the distance between the specimen markings to 100% elongation. C1.22 The moving speed of the sample holder: (500 ± 50) mm/min for rubber and (250 ± 50) mm/min for resin. The tensile test of the composite sheet should first be conducted at a tensile speed of 25 mm/min until the reinforcing layer breaks, and then continue to stretch at the speed specified in 5.3.2.3
5.3.2.2 until the sample breaks completely. 5.3.3 The tear strength test of the sheet material shall be carried out according to the uncut rectangular specimen in GB/T529, and the tensile speed shall be the same as 5.3.2.2; the maximum force when the composite sheet is stretched to break shall be its tear strength. 159
GB 18173. 1--2000
5.3.4 The water-impermeability test of the sheet material shall adopt the cross-shaped pressure plate shown in Figure 3. During the test, install the sample according to the operating procedures of the water permeability tester, and increase the pressure to the specified pressure at one time. After maintaining it for 30 minutes, observe whether the sample has leakage; it is qualified if all three samples have no leakage. Unit: mm
Figure 3 Schematic diagram of the pressure plate of the water permeability tester
5.3.5 The low-temperature bending test of the sheet shall be carried out in accordance with Appendix A (Appendix to the standard). 5.3.6 The heating expansion test of the sheet shall be carried out in accordance with Appendix B (Appendix to the standard). 5.3.7 The hot air aging test of the sheet shall be carried out in accordance with the provisions of GB/T3512. 5.3.8 The hot air aging elongation test of the sheet shall be carried out in accordance with Appendix C (Appendix to the standard). 5.3. 9 The alkali resistance test of the sheet shall be carried out in accordance with the provisions of GB/T 1690. Before the test, the composite sheet shall be edge-sealed by appropriate methods. 5.3.10 The ozone aging test of the sheet shall be carried out in accordance with the provisions of GB/T7762, and the sheet shall be qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.11 The artificial weathering performance of the sheet shall be carried out in accordance with the provisions of GB/T12831: the blackboard temperature is (63±3)℃, the relative humidity is (50±5)%, the rainfall cycle is 120min, of which the rainfall is 18min, the interval drying is 102min, and the total radiation is 495MJ/m2 (or the radiation intensity is 550W/m2, and the test time is 250h). After the sample is treated with ozone, it is parked under standard conditions for 4h, and the performance is measured. The appearance inspection is qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.12 The bonding performance test of the sheet shall be carried out in accordance with Appendix D (Suggested Appendix). 6 Inspection rules
6.1 Inspection classification
6.1.1 Factory inspection
6.1.1.1 Batching and sampling
Take 5.000m2 sheets of the same variety and specification (8000m2 if the daily output exceeds 8000m) as a batch, randomly select 3 rolls for size and appearance quality inspection, and randomly select sufficient samples from the samples that pass the above inspection for physical property inspection. 6.1.1.2 Inspection items
Factory inspection should be carried out on the size, appearance quality, tensile strength at room temperature, elongation at break at room temperature, tear strength, low-temperature bending, and impermeability of the sheets batch by batch.
6.1.2 Type inspection
All technical indicators listed in this standard are type inspection items, and type inspection should usually be carried out in one of the following situations. 160
a) Trial and approval of new products;
GB 18173. 1-2000
b) Significant changes in product structure, design, process, materials, production equipment, management, etc.;c) Change of production, transfer to another factory, or resumption of production after long-term suspension (more than 6 months);d) Contractual provisions;
e) There is a significant difference between the results of the factory inspection and the last type inspection;f) Arbitration inspection or the national quality supervision and inspection agency’s request for the test. Under normal circumstances, ozone aging should be inspected at least once a year, and the rest of the items should be inspected once every six months; artificial weathering is carried out according to user requirements.
6.2 Judgment rules
If all indicators of specifications, dimensions, appearance quality and physical properties meet the technical requirements, the product is qualified. If one of the physical performance indicators does not meet the technical requirements, double samples should be taken for retest. If the retest result is still unqualified, the batch of products is unqualified. 7 Marking, packaging, transportation, purchase and storage
7.1 The sheets are packed with hard core rolls and the outer packaging is packed with suitable materials. 7.2 Each independent package should have a certificate of conformity and indicate the product name, product mark, trademark, manufacturer's name and address, production date, and product standard number.
7.3 When transporting and storing sheets, care should be taken not to damage the packaging. Place them in a ventilated and dry place. The storage stack height should not exceed the height of five flat sheet rolls. When stacking, a flat board should be used as a cushion, 20 cm from the ground, and direct sunlight should be avoided. Contact with acids, alkalis, oils and organic solvents is prohibited, and heat sources should be isolated.
7.4 Under the conditions specified in 7.3, the product performance should comply with the provisions of this standard within a storage period of no more than one year from the date of production.
A1 Test apparatus
GB18173.1—2000
Appendix A
(Standard Appendix)
Low-temperature bending test
The low-temperature bending instrument shall consist of a low-temperature box and a bending plate. The low-temperature box shall be able to automatically adjust between 0 and 40°C, with an error of ±2°C, and shall be able to keep the sample at a constant temperature during operation; the bending plate shall consist of a metal plate, a rotating shaft and a spacing screw, and the spacing between the plates can be adjusted arbitrarily. The schematic diagram is shown in Figure A1.
A2 Test conditions
The storage time of the sample and the test temperature shall comply with the following requirements: A2.1 From sample preparation to test, the time is 24h. A2.2 The temperature of the test room shall be controlled within the range of (23±2)°C. A3 Test Procedure
A3.1 Bend the specimen prepared in accordance with 5.3.1 by 180°, so that the edges of the 50mm wide specimen overlap and are flush, and fix the edges with a positioning clamp or a 10mm wide tape to ensure that they do not misalign during the test; and adjust the distance between the two plates of the bending instrument to three times the thickness of the sheet. A3.2 Open the upper plate of the bending instrument, and place two specimens of the same thickness flat on the bottom plate, with the overlapping side facing the axis and 20mm away from the axis; keep it at the specified temperature for 1h, then quickly press down the upper plate to reach the adjusted spacing position, and take out the specimen after keeping it for 1s. After returning to room temperature, observe whether the specimen is broken at the bend, or use a magnifying glass to observe whether there is a crack on the tensile surface of the specimen at the bend. A4 Judgment
Observe the surface of the specimen with an 8x magnifying glass, and both specimens are qualified if there is no crack. Schematic diagram of bending plate
Testing instrument
GB 18173. 1--2000
Appendix B
(Appendix of the standard)
Heating expansion test
The scale accuracy of the expansion is not less than 0.5mm. B1.2 Aging test chamber.
Test conditions
The storage time of the sample and the test temperature shall meet the following requirements: B2.1 From sample preparation to test, the time is 24h. B2.2 The test chamber temperature is controlled within the range of (23±2)℃. B3 Test procedure
Put the sample prepared according to the specifications and dimensions of Figure B1 into the aging chamber at (80±2)℃ for 168h; after taking out the sample, place it for 1h, measure the length of the sample with a measuring tool, and calculate the expansion based on the initial length. According to the vertical and horizontal directions, the expansion is expressed by the average value of three samples respectively.
Note: If the test piece is bent, it is necessary to apply an appropriate weight to flatten it for measurement. Unit: mm
C1 Test apparatus
C1.1 Aging test chamber.
Figure B1 Schematic diagram of measurement method
Appendix C
(Standard Appendix)
Hot air aging elongation test
The specimen fixture should be able to stretch the distance between the specimen markings to 100% elongation. C1.22 The moving speed of the sample holder: (500 ± 50) mm/min for rubber and (250 ± 50) mm/min for resin. The tensile test of the composite sheet should first be conducted at a tensile speed of 25 mm/min until the reinforcing layer breaks, and then continue to stretch at the speed specified in 5.3.2.3
5.3.2.2 until the sample breaks completely. 5.3.3 The tear strength test of the sheet material shall be carried out according to the uncut rectangular specimen in GB/T529, and the tensile speed shall be the same as 5.3.2.2; the maximum force when the composite sheet is stretched to break shall be its tear strength. 159
GB 18173. 1--2000
5.3.4 The water-impermeability test of the sheet material shall adopt the cross-shaped pressure plate shown in Figure 3. During the test, install the sample according to the operating procedures of the water permeability tester, and increase the pressure to the specified pressure at one time. After maintaining it for 30 minutes, observe whether the sample has leakage; it is qualified if all three samples have no leakage. Unit: mm
Figure 3 Schematic diagram of the pressure plate of the water permeability tester
5.3.5 The low-temperature bending test of the sheet shall be carried out in accordance with Appendix A (Appendix to the standard). 5.3.6 The heating expansion test of the sheet shall be carried out in accordance with Appendix B (Appendix to the standard). 5.3.7 The hot air aging test of the sheet shall be carried out in accordance with the provisions of GB/T3512. 5.3.8 The hot air aging elongation test of the sheet shall be carried out in accordance with Appendix C (Appendix to the standard). 5.3. 9 The alkali resistance test of the sheet shall be carried out in accordance with the provisions of GB/T 1690. Before the test, the composite sheet shall be edge-sealed by appropriate methods. 5.3.10 The ozone aging test of the sheet shall be carried out in accordance with the provisions of GB/T7762, and the sheet shall be qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.11 The artificial weathering performance of the sheet shall be carried out in accordance with the provisions of GB/T12831: the blackboard temperature is (63±3)℃, the relative humidity is (50±5)%, the rainfall cycle is 120min, of which the rainfall is 18min, the interval drying is 102min, and the total radiation is 495MJ/m2 (or the radiation intensity is 550W/m2, and the test time is 250h). After the sample is treated with ozone, it is parked under standard conditions for 4h, and the performance is measured. The appearance inspection is qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.12 The bonding performance test of the sheet shall be carried out in accordance with Appendix D (Suggested Appendix). 6 Inspection rules
6.1 Inspection classification
6.1.1 Factory inspection
6.1.1.1 Batching and sampling
Take 5.000m2 sheets of the same variety and specification (8000m2 if the daily output exceeds 8000m) as a batch, randomly select 3 rolls for size and appearance quality inspection, and randomly select sufficient samples from the samples that pass the above inspection for physical property inspection. 6.1.1.2 Inspection items
Factory inspection should be carried out on the size, appearance quality, tensile strength at room temperature, elongation at break at room temperature, tear strength, low-temperature bending, and impermeability of the sheets batch by batch.
6.1.2 Type inspection
All technical indicators listed in this standard are type inspection items, and type inspection should usually be carried out in one of the following situations. 160
a) Trial and approval of new products;
GB 18173. 1-2000
b) Significant changes in product structure, design, process, materials, production equipment, management, etc.;c) Change of production, transfer to another factory, or resumption of production after long-term suspension (more than 6 months);d) Contractual provisions;
e) There is a significant difference between the results of the factory inspection and the last type inspection;f) Arbitration inspection or the national quality supervision and inspection agency’s request for the test. Under normal circumstances, ozone aging should be inspected at least once a year, and the rest of the items should be inspected once every six months; artificial weathering is carried out according to user requirements.
6.2 Judgment rules
If all indicators of specifications, dimensions, appearance quality and physical properties meet the technical requirements, the product is qualified. If one of the physical performance indicators does not meet the technical requirements, double samples should be taken for retest. If the retest result is still unqualified, the batch of products is unqualified. 7 Marking, packaging, transportation, purchase and storage
7.1 The sheets are packed with hard core rolls and the outer packaging is packed with suitable materials. 7.2 Each independent package should have a certificate of conformity and indicate the product name, product mark, trademark, manufacturer's name and address, production date, and product standard number.
7.3 When transporting and storing sheets, care should be taken not to damage the packaging. Place them in a ventilated and dry place. The storage stack height should not exceed the height of five flat sheet rolls. When stacking, a flat board should be used as a cushion, 20 cm from the ground, and direct sunlight should be avoided. Contact with acids, alkalis, oils and organic solvents is prohibited, and heat sources should be isolated.
7.4 Under the conditions specified in 7.3, the product performance should comply with the provisions of this standard within a storage period of no more than one year from the date of production.
A1 Test apparatus
GB18173.1—2000
Appendix A
(Standard Appendix)
Low-temperature bending test
The low-temperature bending instrument shall consist of a low-temperature box and a bending plate. The low-temperature box shall be able to automatically adjust between 0 and 40°C, with an error of ±2°C, and shall be able to keep the sample at a constant temperature during operation; the bending plate shall consist of a metal plate, a rotating shaft and a spacing screw, and the spacing between the plates can be adjusted arbitrarily. The schematic diagram is shown in Figure A1.
A2 Test conditions
The storage time of the sample and the test temperature shall comply with the following requirements: A2.1 From sample preparation to test, the time is 24h. A2.2 The temperature of the test room shall be controlled within the range of (23±2)°C. A3 Test Procedure
A3.1 Bend the specimen prepared in accordance with 5.3.1 by 180°, so that the edges of the 50mm wide specimen overlap and are flush, and fix the edges with a positioning clamp or a 10mm wide tape to ensure that they do not misalign during the test; and adjust the distance between the two plates of the bending instrument to three times the thickness of the sheet. A3.2 Open the upper plate of the bending instrument, and place two specimens of the same thickness flat on the bottom plate, with the overlapping side facing the axis and 20mm away from the axis; keep it at the specified temperature for 1h, then quickly press down the upper plate to reach the adjusted spacing position, and take out the specimen after keeping it for 1s. After returning to room temperature, observe whether the specimen is broken at the bend, or use a magnifying glass to observe whether there is a crack on the tensile surface of the specimen at the bend. A4 Judgment
Observe the surface of the specimen with an 8x magnifying glass, and both specimens are qualified if there is no crack. Schematic diagram of bending plate
Testing instrument
GB 18173. 1--2000
Appendix B
(Appendix of the standard)
Heating expansion test
The scale accuracy of the expansion is not less than 0.5mm. B1.2 Aging test chamber.
Test conditions
The storage time of the sample and the test temperature shall meet the following requirements: B2.1 From sample preparation to test, the time is 24h. B2.2 The test chamber temperature is controlled within the range of (23±2)℃. B3 Test procedure
Put the sample prepared according to the specifications and dimensions of Figure B1 into the aging chamber at (80±2)℃ for 168h; after taking out the sample, place it for 1h, measure the length of the sample with a measuring tool, and calculate the expansion based on the initial length. According to the vertical and horizontal directions, the expansion is expressed by the average value of three samples respectively.
Note: If the test piece is bent, it is necessary to apply an appropriate weight to flatten it for measurement. Unit: mm
C1 Test apparatus
C1.1 Aging test chamber.
Figure B1 Schematic diagram of measurement method
Appendix C
(Standard Appendix)
Hot air aging elongation test
The specimen fixture should be able to stretch the distance between the specimen markings to 100% elongation. C1.27 The hot air aging test of the sheet shall be carried out in accordance with the provisions of GB/T3512. 5.3.8 The hot air aging elongation test of the sheet shall be carried out in accordance with Appendix C (Appendix of the standard). 5.3.9 The alkali resistance test of the sheet shall be carried out in accordance with the provisions of GB/T 1690. Before the test, the composite sheet shall be edge-sealed by an appropriate method. 5.3.10 The ozone aging test of the sheet shall be carried out in accordance with the provisions of GB/T7762. The sheet shall be qualified if there is no crack when inspected with an 8x magnifying glass. 5.3.11 The artificial weathering performance of the sheet shall be carried out in accordance with the provisions of GB/T12831: the blackboard temperature is (63 ± 3) °C, the relative humidity is (50 ± 5)%, the rainfall cycle is 120 min, of which the rainfall is 18 min and the interval drying is 102 min. The total radiation is 495 MJ/m2 (or the radiation intensity is 550 W/m2, and the test time is 250 h). After the sample is treated with Xilu, it is placed under standard conditions for 4 hours for performance measurement. The appearance inspection is qualified if there is no crack using an 8x
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