GB/T 8814-1998 Rigid polyvinyl chloride (PVC) profiles for door and window frames
Some standard content:
GB/T8814-1998
This standard refers to Japan's JIS K6785-1985 "Special Profiles for Rigid Polyvinyl Chloride Window Frames", and is basically consistent with the Japanese industrial standard in terms of technical content.
When revising GB8814-88, the contents of GB8814-88 that have been proven to be suitable for my country's situation and do not affect the advanced nature of the standard are retained, and appropriate modifications are made to certain items or indicators, such as: adding the provisions for the radius of the drop hammer; the specimen is limited to cutting on the profile; the weather resistance color change classification assessment; the oxygen index is increased to 38%; the simple beam impact strength item adopts ISO179:1993 "Plastics-Determination of Simple Beam Impact Strength" method for testing, etc. This standard shall be implemented from May 1, 1999. From the date of entry into force, this standard will also replace GB8814-88. This standard is proposed by the China Light Industry Federation.
This standard is under the jurisdiction of the National Technical Committee for Standardization of Plastic Products. This standard was drafted by Tianjin Plastics Research Institute. The main drafters of this standard are Wang Huanqin, Ma Li, Shao Qingzhong and Yang Shanliang. 289
1 Scope
National Standard of the People's Republic of China
Unplasticized polyvinyl chloride (PVC) profiles for the frames of doors and windowsGB/T 8814--1998
Replaces GB8814--88
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of profiles for doors and window frames (hereinafter referred to as profiles) made of polyvinyl chloride resin as the main raw material and extruded. This standard is applicable to unplasticized polyvinyl chloride profiles for doors and window frames. 2
Cited 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 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. GB250—84 Grey scale for assessing discoloration
GB/T1040--92 Test method for tensile properties of plastics GB/T1633—79 Test method for softening point (Vicat) of thermoplastics GB/T 2406—93
Test method for burning properties of plastics Oxygen index method Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches) GB/T 2828--81
GB2918—82 Standard environment for conditioning and testing of plastic specimens GB/T 3681—83
Test method for exposure of plastics to natural climate
GB/T 9341-88
Test method for bending properties of plastics
GB/T 9342—88
Test method for Rockwell hardness of plastics
Test method for exposure of plastics to xenon light source
GB/T 9344---88
IS0 179: 1993
3 Technical requirements
3.1 Classification
Method for determining the pendulum impact strength of plastics
See Table 1 for the classification of profiles.
External doors and window frames
Inner doors and window frames
3.2 Appearance and color
The surface of the profiles of door frames and window frames exposed to the outside of the building shall be smooth, and no cracks, impurities or uneven defects that affect the use shall be allowed. Profile 1 is generally white, and the color shall be uniform. Other colors shall be determined by negotiation with the user. 3.3 Dimensional deviation
Approved by the State Administration of Quality and Technical Supervision on September 29, 1998, and implemented on May 1, 1999
See Table 2 for the dimensional deviation.
Project name
Sectional dimensions
Molding edge, assembly part matching
Bending degree
3.4Quality
GB/T 8814—1998
The quality deviation of profile per unit length shall be less than 5% of the specified value. 3.5Physical and mechanical properties
Physical and mechanical properties shall comply with the provisions of Table 3. Table 3
Test method
Hardness, HRR
Tensile yield strength, MPa
Elongation at break, %
Flexural modulus of elasticity, MPa
Number of cracks after low-temperature drop hammer impact
Vicat softening point, C
State after heating
Dimension change rate after heating, %
Oxygen index, %
Dimension change rate after high and low temperature cycles, %
Simple beam impact strength
Weather resistance
23℃±2℃
—10 ℃±1℃
Simply supported beam impact strength
Color change, grade
Allowable deviation
No bubbles, cracks, pitting
4.1 Conditioning and test environment
Conduct condition adjustment according to the standard environment and normal deviation range specified in GB2918, and the adjustment time shall not be less than 24h, and test shall be carried out under this condition.
4.2 Sample
The sample is cut from the profile.
4.3 Appearance and color
Visually inspect under natural light.
4.4 Curvature
GB/T 8814-1998
Take three sections of 1m long profile as samples, place the sides of the sample parallel to the surface of the platform, and use a feeler gauge to measure the maximum distance between the bottom edge of the sample and the platform.
4.5 Dimensional deviation
The length deviation is measured with a measuring tool with an accuracy of 1 mm, and other dimensional deviations are measured with a vernier caliper with an accuracy of 0.02 mm or a measuring tool with equal or higher accuracy.
4.6 Hardness
Tested in accordance with the provisions of GB/T9342. Three-layer superimposed specimens are used. 4.7 Tensile strength and elongation at break
Tested in accordance with the provisions of GB/T1040, the specimen is type 1, and the tensile speed is 10mm/min. 4.8 Flexural modulus
Tested in accordance with the provisions of GB/T9341.
4.9 Simply supported beam impact strength
Tested in accordance with the provisions of JSO179.
4.9.1 The specimen adopts a double V-notch, with a length (1) of 80mm±2mm, a width (6) of 10.0mm±0.2mm, a notch curvature radius of 0.20mm±0.05mm, and a notch residual width (b) of 6.0mm±0.2mm. 4.9.2 Test conditions
The specimen span is 62+5mm, and the impact method is shown in Figure 1. a) Normal temperature impact
The specimen is tested at 23℃±2℃. b) Low temperature impact
The specimen is placed at ~-10℃±1℃ for at least 2h, and then tested at 23℃±2℃, and completed within 10s. Visible surface, aged surface
Impact direction
4.9.3 After the impact, whether the specimen is broken or bent through, the energy indication is valid. 4.10 Low-temperature drop-weight impact test
4.10.1 Principle
The drop-weight impact test adopts the through-through method.
4.10.2 Sample preparation
Use the mechanical processing method to cut the profile 300mm±5mm, 10 samples per group. 4.10.3 Test equipment
Drop-weight impact test machine. The drop-weight mass is 1000g±40g, and the hammer head radius is 25mm±2mm. The sample support is shown in Figure 2.292
GB/T 8814—1998
Unit: mm
4.10.4 Test conditions
After the sample is placed at -10℃±1℃ for 4h, the test begins. The test is completed within 10s in a standard environment (23℃±2℃). 4.10.5 Test steps
Place the sample with the visible surface facing upward on two supports, and let the hammer hit the center of the sample. The hammer drop height is 1m for Class A and 0.5m for Class B.
4.11 Vicat softening point
Test according to Method A in GB1633--79. The static load G=9.810+℃49N is borne by the sample. 4.12 State after heating
4.12.1 Sample preparation
Use mechanical processing to cut the profile with a length of 200mm±5mm. Number of samples: 3. 4.12.2 Test equipment
Electric heating blast oven.
4.12.3 Test steps
Put the sample horizontally on a glass plate sprinkled with talcum powder in an electric hot air oven at 150℃±3℃. After 30 minutes, take it out together with the glass plate and cool it to room temperature. Observe whether there are bubbles, cracks or pitting. 4.13 Dimensional change rate after heating
4.13.1 Sample preparation
Use mechanical processing to cut the profile with a length of 200mm±5mm, and the number of samples is 3. 4.13.2 Test equipment
Electric heating blast oven.
4.13.3 Test steps
Draw two marking lines with a spacing of 180mm in the middle of the visible surface of each sample, accurate to 0.1mm. Place it flat on a glass plate sprinkled with talcum powder in an electric heating blast oven at 100℃±3℃, take it out together with the glass plate after 1h, and cool it to room temperature. Measure the distance between the marking lines, accurate to 0.1mm.
4.13.4 Results and expression
The dimensional change rate after heating is calculated according to formula (1): Where: AL—dimensional change rate after heating, %; ALo
L. —-Distance between sample markings before heating, mm; L,-Distance between sample markings after heating, mm. 4.14 Oxygen index
Perform according to GB/T2406.
4.15 Weather resistance
When the natural climate exposure test of plastics is carried out according to GB/T3681, the test time of Class A is 12 months and that of Class B is 8 months. When the xenon light source exposure test of plastics is carried out according to GB/T 8814--1998
GB/T9344, the test time of Class A is 1000h. Class B is 500h, the rainfall time is 18min every 120min, and the blackboard temperature is 63℃±3℃. 4.15.1 Simply supported beam impact test
The specimen is cut from the visible surface of the profile. The preparation and test of the specimen shall comply with the provisions of 4.9. During the impact, the irradiated surface of the specimen shall face away from the punch (see Figure 1).
4.15.2 Color change
Test according to the provisions of GB250.
4.16 Dimensional change after repeated high and low temperature tests
4.16.1 Specimen preparation
Use mechanical processing to cut a profile with a length of 500mm±5mm. The number of specimens is 3. 4.16.2 Test equipment
Electric heating blast oven, refrigerator.
4.16.3 Test steps
Draw two marking lines with a spacing of 450mm in the middle of the visible surface of each specimen, and repeat the high and low temperature test 5 times. As shown below: 23℃±2℃--20℃±3℃→23C±2℃-→60℃±3C1h
Then place at 23±2℃ for more than 12h, and measure the distance between the markings with an accuracy of 0.1mm. 4.16.4 Results and Expression
The high and low temperature repeated dimensional change rate is calculated according to formula (2): A
Where: △L-high and low temperature repeated dimensional change rate, %Distance between markings before test, mm;
-Distance between markings after test, mm.
5 Inspection Rules
5.1 Inspection Classification
5.1.1 Factory Inspection
L. ×100
Factory inspection is carried out in batches, and the inspection items are 2, 3, 5, 7, and 8 in Table 2 and Table 3. 5.1.2 Type Inspection
Type inspection items are all the contents of technical requirements. Type inspection should be carried out in any of the following situations: a) Trial design and identification of new products or old products for transfer to factory production; b) After formal production, if there are major changes in raw materials and processes, which may affect product performance; () During normal production, inspection is carried out every three months (except for weather resistance indicators); d) During normal production, weather resistance inspection is carried out once every three years; e) When the product is resumed after a long period of suspension; f) When there is a significant difference between the factory inspection results and the last type inspection; g) When the national quality supervision agency proposes a requirement for type inspection. 5.2 Sampling and batching
5.2.1 Batch
A batch of profiles with the same raw materials, process, formula, and specifications, which are continuously produced for no more than one month and the output does not exceed 20 is considered a batch. 5.2.2 Sampling
GB/T88141998
5.2.2.1 Appearance, color and size inspection shall be carried out in accordance with GB/T2828, using the normal inspection-second sampling plan, taking the general inspection level 1 qualified quality level AQL6.5, see Table 4. Ac and R in Table 4 are counted as unqualified products. Table 4
Batch range
91~150
151～280
281～500
501~1200
1 201~3 200
3201～10000
Sample size
Number of qualified judgment
Unit: root
Number of unqualified judgment
5.2.2.2 For the physical and mechanical properties test, three products shall be randomly selected from each batch, with a total of not less than 12m. Each item shall be cut from three products respectively.
5.3 Judgment rules
5.3.1 Judgment of qualified items
5.3.1.1 Judgment of appearance and size
The appearance and size inspection results shall be judged according to the provisions of Table 4. 5.3.1.2 Determination of physical and mechanical properties
If there are unqualified items in the physical and mechanical properties test results, double samples should be randomly selected from the original batch and retested. If all the retest results are qualified, the physical and mechanical properties are qualified. 5.3.2 Determination of qualified batches
If all the appearance, size, and physical and mechanical properties test results are qualified, the entire batch is judged to be qualified. 6 Marking, packaging, transportation, storage
6.1 Marking
The outer packaging of each product should have the following markings: the adopted standard number, trademark, name and address of the production unit, product batch number, model, and certificate of conformity.
6.2 Packaging
The profiles should be tied tightly and wrapped with plastic film or other materials. 6.3 Transportation
Avoid heavy pressure during transportation, protect from sunlight and rain, and load and unload lightly. 6.4 Storage
The product should be stored in a cool, ventilated warehouse, stacked flat, with the height not exceeding 1 m and at least 1 m away from heat sources. 2951 Factory inspection
L. ×100
Factory inspection is carried out in batches, and the inspection items are 2, 3, 5, 7, and 8 in Table 2 and Table 3. 5.1.2 Type inspection
Type inspection items are all the contents of technical requirements. Type inspection should be carried out in any of the following situations: a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in raw materials and processes, which may affect product performance; () During normal production, an inspection is carried out every three months (except for weather resistance indicators); d) During normal production, a weather resistance inspection is carried out every three years; e) When the product is resumed after a long period of suspension; f) When there is a significant difference between the factory inspection results and the last type inspection; g) When the national quality supervision agency proposes a requirement for type inspection. 5.2 Sampling and batching
5.2.1 Batching
A batch of profiles with the same raw materials, process, formula and specifications, which are continuously produced for no more than one month and the output does not exceed 20 pieces, is considered as one batch. 5.2.2 Sampling
GB/T88141998
5.2.2.1 Appearance, color and size inspection shall be carried out in accordance with GB/T2828, using the normal inspection-second sampling plan, taking the general inspection level 1 qualified quality level AQL6.5, see Table 4. Ac and R in Table 4. Count as defective products. Table 4
Batch range
91~150
151～280
281～500
501~1200
1 201~3 200
3201～10000
Sample size
Number of qualified judgment
Unit: root
Number of unqualified judgment
5.2.2.2 For the physical and mechanical properties test, three products shall be randomly selected from each batch, with a total of not less than 12m. Each item shall be cut from three products respectively.
5.3 Judgment rules
5.3.1 Judgment of qualified items
5.3.1.1 Judgment of appearance and size
The appearance and size inspection results shall be judged according to the provisions of Table 4. 5.3.1.2 Determination of physical and mechanical properties
If there are unqualified items in the physical and mechanical properties test results, double samples should be randomly selected from the original batch and retested. If all the retest results are qualified, the physical and mechanical properties are qualified. 5.3.2 Determination of qualified batches
If all the appearance, size, and physical and mechanical properties test results are qualified, the entire batch is judged to be qualified. 6 Marking, packaging, transportation, storage
6.1 Marking
The outer packaging of each product should have the following markings: the adopted standard number, trademark, name and address of the production unit, product batch number, model, and certificate of conformity.
6.2 Packaging
The profiles should be tied tightly and wrapped with plastic film or other materials. 6.3 Transportation
Avoid heavy pressure during transportation, protect from sunlight and rain, and load and unload lightly. 6.4 Storage
The product should be stored in a cool, ventilated warehouse, stacked flat, with the height not exceeding 1 m and at least 1 m away from heat sources. 2951 Factory inspection
L. ×100
Factory inspection is carried out in batches, and the inspection items are 2, 3, 5, 7, and 8 in Table 2 and Table 3. 5.1.2 Type inspection
Type inspection items are all the contents of technical requirements. Type inspection should be carried out in any of the following situations: a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in raw materials and processes, which may affect product performance; () During normal production, an inspection is carried out every three months (except for weather resistance indicators); d) During normal production, a weather resistance inspection is carried out every three years; e) When the product is resumed after a long period of suspension; f) When there is a significant difference between the factory inspection results and the last type inspection; g) When the national quality supervision agency proposes a requirement for type inspection. 5.2 Sampling and batching
5.2.1 Batching
A batch of profiles with the same raw materials, process, formula and specifications, which are continuously produced for no more than one month and the output does not exceed 20 pieces, is considered as one batch. 5.2.2 Sampling
GB/T88141998
5.2.2.1 Appearance, color and size inspection shall be carried out in accordance with GB/T2828, using the normal inspection-second sampling plan, taking the general inspection level 1 qualified quality level AQL6.5, see Table 4. Ac and R in Table 4. Count as defective products. Table 4
Batch range
91~150
151～280
281～500
501~1200
1 201~3 200
3201～10000wwW.bzxz.Net
Sample size
Number of qualified judgment
Unit: root
Number of unqualified judgment
5.2.2.2 For the physical and mechanical properties test, three products shall be randomly selected from each batch, with a total of not less than 12m. Each item shall be cut from three products respectively.
5.3 Judgment rules
5.3.1 Judgment of qualified items
5.3.1.1 Judgment of appearance and size
The appearance and size inspection results shall be judged according to the provisions of Table 4. 5.3.1.2 Determination of physical and mechanical properties
If there are unqualified items in the physical and mechanical properties test results, double samples should be randomly selected from the original batch and retested. If all the retest results are qualified, the physical and mechanical properties are qualified. 5.3.2 Determination of qualified batches
If all the appearance, size, and physical and mechanical properties test results are qualified, the entire batch is judged to be qualified. 6 Marking, packaging, transportation, storage
6.1 Marking
The outer packaging of each product should have the following markings: the adopted standard number, trademark, name and address of the production unit, product batch number, model, and certificate of conformity.
6.2 Packaging
The profiles should be tied tightly and wrapped with plastic film or other materials. 6.3 Transportation
Avoid heavy pressure during transportation, protect from sunlight and rain, and load and unload lightly. 6.4 Storage
The product should be stored in a cool, ventilated warehouse, stacked flat, with the height not exceeding 1 m and at least 1 m away from heat sources. 295
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