Some standard content:
ICS 79.060.20
National Standard of the People's Republic of China
GB/T 11718—1999
Medium density fibreboard
Medium density fibreboard
Issued on November 10, 1999
Implemented on April 1, 2000
Issued by the State Administration of Quality and Technical Supervision
GB/T 11718—1999
This standard equivalently adopts Part 1 (General) and Part 2 (General Technical Standard) of the European Medium Density Fibreboard Industry Standard (EMB, 3rd edition, 1995) formulated by the Technical Committee of the European Medium Density Fibreboard Manufacturers Association (EMB). This standard is a general standard for medium density fiberboard. Compared with the previous version (GB11718.1~11718.10) 1989, the important technical content changes are: (1) adding physical and mechanical performance indicators for thick and thin boards; (2) adding technical indicators and test methods for surface absorption performance, surface bonding strength, dimensional stability and sand content; (3) the determination of formaldehyde release retains the iodine method and adds the photometric method. This standard shall be implemented from April 1, 2000. From the date of implementation, this standard will replace GB/T 11718.1~11718.10-1989. Appendix A, Appendix B and Appendix C of this standard are all appendices to the standard. This standard is proposed by the State Forestry Administration. This standard is under the jurisdiction of the National Technical Committee for Standardization of Wood-Based Panels. This standard was drafted by Fuzhou Wood-Based Panel Factory, Wood Industry Research Institute of Chinese Academy of Forestry, National Wood-Based Panel Quality Supervision and Inspection Center, Beijing Guanghua Wood Factory, Beijing Tiantan Furniture Company and other units. The main drafters of this standard are Huang Yuting, Tu Xujiang Fuchang, Wang Tianyou, Guo Yulan, Fang Yuping and Yan Chaohua. This standard was first issued in November 1989 and first implemented in December 1989. This is the first revision. This standard is entrusted to the National Technical Committee for Standardization of Wood-Based Panels for interpretation. 1 Scope
National Standard of the People's Republic of China
Medium density fiber
Medium density fiberhoard
GB/T11718-1999
Generation GB/T 11718.1~11718.10-1989 This standard specifies the meaning, technical requirements, inspection rules and test methods of medium density fiberboard.
This standard applies to medium density fiberboard produced by dry process
2 Referenced standards
The following standards contain provisions that are used in this standard and constitute the provisions of this standard. When this standard is published, the versions shown are revised. All parties using this standard shall consider them valid. All standards will be
GB/T 2828-198
GB/T 17657- 1999
3 Definitions
This standard adopts the following
3.1 Medium density fiberboard
The latest version of the following effective standards shall be used as possible.
Order and sampling
Non-table (applicable)
Batch inspection counting sampling procedure
Artificial #
board physical and chemical properties test method
Artificial board and facing
Medium density fiberboard
Medium density fiberboard is
a kind of board made of
grain fiber or other plant fiber as
raw material, urea-formaldehyde resin or other synthetic resistant fat, and pressed under heating and pressure. Usually the thickness exceeds 1.0mm and the density is below 450, and the board properties are improved.
3.2 Indoor type boardinteno
Medium
density fiberboard that does not have the ability to withstand water
3.3 Moisture-proof type boardhumid
High humidity in a short term.
Lesise
t board
880kg/m2 Other suitable additives can also be added
Medium density fiberboard with a sensitizing effect, suitable for use in indoor kitchens and bathrooms. Medium density fiberboard with a short-term aging effect of cold water immersion or soaking or with the humid heat of water vapor in a ventilated place. 3.5 Local softness partial softness
Local looseness caused by poor paving or poor bonding 3.6 Edge and corner defects edgc and cornerbrcakage Defects caused by damage to the four corners or edges of the board. 4 Classification and symbols
Medium density fiberboard can be classified according to thickness, characteristics, applicable conditions or applicable scope. This standard is classified according to the applicable conditions of medium density fiberboard, see Table 1. Approved by the State Administration of Quality and Technical Supervision on November 10, 1999 and implemented on April 1, 2000
Indoor medium density fiberboard
Indoor moisture-proof medium density fiberboard
Outdoor medium density fiberboard
Technical requirements
GB/T 11718—1999
Table 1, classification of medium density fiberboard
Indoor type board
Moisture-proof type board
Outdoor type board
Symbol
Applicable conditions
Scope of application
All non-load-bearing applications, such as furniture and
decoration parts.
Medium density fiberboard shall comply with the provisions of Table 2, Table 3, Table 4 and Table 5 when leaving the factory. If there are other technical requirements, the supplier and the buyer shall negotiate and order them separately. 5.1 Products are divided into three grades according to appearance quality and internal bonding strength indicators: superior products, first-class products, and qualified products. 5.2 Appearance quality
5.2.1 The product shall not be delaminated or bubbling. 5.2.2 The front surface of the product shall comply with the provisions of Table 2. Table 2 Front surface quality requirements
Depression name
Local looseness
Corner defect
5.3 Product format specifications and dimensional deviation.
Defect regulations
Diameter ±50mm
Width ≤≥10 mm
Diameter ≤8 mm
Superior products
Permitted range
First-class products
Not allowed
Not allowed
Not allowed
Not allowed
Format specifications: Width is 122umm, 915mm, length is 2440mm.2135mm, 1830mm. 5.3.1
Dimension deviation shall comply with the provisions of Table 3.
Table 3 Dimension deviation
Thickness deviation
Length and width deviation
Diagonal difference
Warp
Edge non-straightness
The thickness of each measuring point in each plate shall not exceed the arithmetic mean value of ±0.15mm. 1
2 When the plate thickness is ≤6 mm, the warpage shall not be measured. 5.4 Quality requirements for indoor panels
5.4.1 The physical and mechanical performance indicators of indoor panels shall comply with the requirements of Table 4. 2
Nominal thickness range, mm
Qualified products
Superior products
First-class products
Qualified products
Static bending strength
Elastic modulus
Screw holding force
Water absorption thickness expansion rate
Moisture content
Density deviation in board
1. 8~ 2. 5
GB/T 117181999
Table 4 Physical and mechanical properties of indoor panels Nominal thickness range, mm
>2. 5~1. 0
Note, when the board thickness is less than 15 mm, the screw holding force is not measured. 5.4.2
,>9~12
Formaldehyde release belt of medium density fiberboard shall comply with the provisions of Table 5. 0.60
450-~880
Table 5 Formaldehyde emission index
mg/100 g
>12~19
>19--30
Indicator position
>9.0--≤,40.0
Note: The formaldehyde emission index is applicable to boards with a moisture content II (%) of 6.5. For different moisture contents, the measured value should be multiplied by the correction factor F. When the moisture content II of the board is ≥4 or H≤9, the coefficient F should be calculated according to the following formula F = - 0.133H + 1,86
When the moisture content of the board is H4 or H>9, the coefficient F should be calculated according to the following numerical formula: f—0.636 +3.12e(-0. 34)
5.4.3 Other properties
Table 6 specifies the surface bonding strength, surface absorption performance, sand content and dimensional stability for other properties of medium density fiberboard, Table 6 Other performance requirements
Other properties
Surface bonding strength
Surface absorption performance
Sand content
(65~85)%
(65~35)%
(65~85)%
(65~35)%
Nominal thickness range, mm
>19~30
Other properties
GB/T 11718- 1999
Table 6 (End)
Nominal thickness range·row!
-The length growth rate caused by the temperature (20-2)℃, the relative humidity increases from 65% to 85%. -The length contraction rate caused by the temperature (20±2)℃, the relative humidity decreases from 65% to 35%. DL
-The thickness growth rate caused by the temperature (20±2)℃, the cabinet relative humidity increases from 65% to 85%, DT
The thickness contraction rate caused by the temperature (20±2)℃, the relative humidity decreases from 65% to 35%, 19-30
5.5 Appendix A (Standard Appendix) of this standard specifies the main physical and mechanical performance indicators of moisture-proof board (MDFH) and outdoor board (MDF.E). The water resistance of moisture-proof board shall meet the requirements of either method 1 or method 2 specified in Table A1. Other technical requirements shall comply with the corresponding regulations of CHINA 5.2, 5.3 and 5.4. 6 Inspection rules 6-1 Inspection classification Delivered goods inspection and type inspection Product inspection classification 6.1.1 Factory inspection Including the following items: a) Appearance quality inspection; b) Specification and dimensional measurement; e) Mechanical properties d) Physical properties In addition to all the items included in the factory inspection, the following items are added 6.1.2 Type inspection Screw grip force a) Mechanical performance measurement Items: Elastic modulus) Formaldehyde release
6 1.3 Type inspection should be carried out when one of the following two occurs:
When there is a major change in the science and production process
) When the raw and auxiliary products are in production;
b) Long-term suspension
c) Normal production. The annual inspection shall be not less than four times. 6.2 Sampling and judgment rules
6.2.1 Appearance quality inspection
2828 The one-time sampling plan, its inspection level is 1, the qualified quality level is 4.0, see GB/T
table? . According to the provisions of 5.2, the qualified and unqualified shall be judged. Surface appearance quality oil sample plan for Mai 7
Batch range
51~~90
91~150
151--280
281--500
501~1200
1201～3200
3201~10000
10001~35000
Number of samples
Number of qualified judgments
Number of unqualified judgments
Number of qualified samples
6.2.2 For specification and size measurement, the single sampling plan in GB/T2828 is adopted. Its inspection level is S-4 and the standard quality level is 6.5, see Table 8. Determine whether qualified or unqualified according to the provisions of 5.3 4
Batch range
91--150
151-~280
281~500
501～1 200
1 201~3200
3 201-~10 000
1t:00135000
Number of samples
GB/T 117181999
Table 8 Sampling plan for specifications and sizes
Number of qualified judgments
Number of unqualified judgments
Number of qualified samples
6.2.3 Determination of physical and mechanical properties and the amount of aldose. In each batch of products, 0.% (but not less than one) of the samples shall be randomly selected. The average test results of the sample bed shall comply with the provisions of 5.4. The board shall be tested. If each sample board
does not meet the requirements, it is allowed to double sample and re-test once in the batch of products. If the re-test fails, the batch of products shall be judged as unqualified. The test results shall be filled in Appendix B (Appendix to the standard) and Appendix C (Appendix to the standard) respectively
6.2.4 The appearance quality, the grade judgment limit shown in the limit, the chemical properties and the formaldehyde release test results shall all meet the requirements of the corresponding grade, otherwise the lowest index shall be used. 6.3 If the purchaser requires the inspection of the delivered medium-density fiberboard, it shall be submitted to the supplier within three months from the date of shipment, and the statutory inspection unit shall be asked to inspect according to this standard. For technical supervision inspection, the samples shall be taken from the products produced within six months before the inspection. 6.4 When the product is in sheets, the measurement unit shall be accurate to 0.
(the allowable deviation shall not be calculated: when delivered in batches, the measurement shall be accurate to 0.01m, and the measurement unit shall be 1m.
Marking, packaging, transportation and storage, identification 7.1 Marking
Products shall be marked with the cover
type, grade, production date and inspector code. If the product is for self-use, it can be based on the supplier's The contract stipulates that the product mark shall not be affixed. 7.2 Packaging. Each package shall be properly packed according to the grade. Each package shall be hung with a label indicating the manufacturer's products. The products shall be protected from moisture, rain, sun and deformation during transportation and storage. 7.4 Labeling. Different types of medium density fiberboard shall be labeled according to the colors specified in Table 9. Table 9 Color Labeling of Board Types. Types of Medium Density Fiberboard. Indoor Board. Moisture-proof Board. Outdoor Board. 8 Test Methods. 8.1 Measurement of Dimensions. Symbols indicating names, product names, trademarks, specifications, etc. 8.1.1 Instruments. 8. 1. 1. 1 Micrometer, accuracy 0. 01 mm. 8. 1. 1. 2 Steel tape measure, accuracy 1 mm. 8.1.2 Measurement of thickness
GB/T 11718 —1999
Use a T-meter to measure 8 points, including the four corners 25 mm inward from the four sides of the plate and the middle of the four sides 25 mm inward from the four sides of the plate. The arithmetic average is the plate thickness, accurate to 0. 01 mm.
8.1.3 Measurement of length and width
The length is measured on both sides of the plate width and the width is measured on both sides of the plate length, accurate to 1 mm. 8.1.4 Measurement of diagonal length
Use a steel tape measure to measure the diagonal length of the plate and calculate the difference between the two diagonals, accurate to 1 mm. 8.1.5 Measurement of warpage
Place the concave surface of the board on a horizontal platform, and place the edge of a 1000mm long ruler vertically on the concave surface of the board to measure its maximum chord height, accurate to 0.5mm.
8.1.6 Measurement of edge straightness
Aim the side of a steel tape measure at the edge of the board, or straighten a steel wire rope and fix it at the two corners on the same side of the board, and measure the maximum deviation between the board edge and the tape measure (or wire rope), accurate to 0.5mm. All four sides of the board should be measured. See Figure 1. A
Steel tape measure
Medium density fiberboard
+deviation
-deviation
Figure 1 Measurement of edge non-straightness
8.2 Sampling and preparation of test pieces
8.2.1 Instrument
8-2.1.1 Micrometer, accuracy 0.01mm.
8.2.1.2 Vernier caliper, accuracy 0.1mm. 8.2.1.3 Balance, sensitivity 0.01mm.
8.2.2 Method
The sample is extracted according to the provisions of 6.2.3. The sample is cut into five pieces as shown in Figure 2, of which samples 1, 2, and 3 are used to prepare the test pieces for physical and mechanical properties, and samples 4 and 5 are used to prepare the test pieces for formaldehyde emission. The test pieces are taken from samples 1, 2, and 5 as shown in Figure 3.3. If there are defects at the specified specimen location, the specimen location can be moved appropriately. When the plate thickness is greater than 25mm, static bending strength and elastic modulus specimens (size exceeding 550mm) can be prepared arbitrarily in the sample, and other specimens can be prepared with reference to Figure 3. The size, quantity and number of the specimens are shown in Table 10. The specimen edge should be straight, and the adjacent two sides should be at right angles. The measurement of the specimen size is carried out according to the method specified in 4.1 of GB/T17657-1999. 6
Test performance
Moisture content
Water absorption thickness expansion rate
Internal bonding strength
Sample 4
Sample 5
GB/T 11718—1999
Sample 3
Sample length
Figure 2 Schematic diagram of sample cutting
50,50,50
20h+50
Figure 3 Schematic diagram of sample preparation
Size and quantity of sample
Size of sample, mm
100×100
100×100
50×50
Number of sample check
Sample!
Sample 2
Unit: mm
Unit: mm
Test performance
Static bending strength and elastic mold
Screw holding force
Table 2 Combination strength
Sand content
Surface absorption performance
Dimensional stability
Formaldehyde emission
Specimen size.mm
GB/T11718—1999
Table 10 (Complete)
Number of specimens
Length 20 fifty 50 (not less than
150mm), width 50
150×50
50×50
300×100
8.3 Density determination
8.3.1 Density measurement
3 vertical and horizontal
6 on the board surface
9 on the board
200g
3 vertical
6 on the line floor
-1999 according to the method specified in 4.2
GB/T 17657-
8.3.2 Density deviation 4p (%) in the board shall be calculated according to the formula (1+, accurate to 0.1% where: 0
Density deviation, %,
Density, g/cm*
Reference density, g/cm*
Average density.g/cm.
8.4 Moisture content measurement
40)x
Moisture content measurement/The method specified in 4.3 of T17657-1999 8.5 Water absorption thickness expansion test Water absorption thickness expansion chamber test According to GB/T17667 8.6 Internal bonding strength test Internal bonding strength test According to GB/T17657 1999 4.5 method. Drift time 24h ± 5min, 4.8 method. 8.7 Static flexural strength and elastic modulus Static flexural strength and elastic modulus test According to GB/T17657 1999 4.9 method. 8.8 Screw holding force determination
Screw holding force determination shall be carried out in accordance with the method specified in 4-10 of GB/T17657-1999. 8.9 Formaldehyde release determination
Formaldehyde release determination shall be carried out in accordance with the method specified in 4.11 of GB/T17657-1999. 8.10 Surface bonding strength determination
Surface bonding strength determination shall be carried out in accordance with the method specified in 4.13 of GB/T17657-1999. 8.11 Surface absorption performance determination shall be carried out in accordance with the method specified in 4.24 of GB/T17657--1999. 8.12 Sand content determination
Sand content determination shall be carried out in accordance with the method specified in 4.28 of GB/T17657-1999. 8.13 Dimensional stability determination
Dimensional stability determination shall be carried out in accordance with the method specified in 4.34 of CB/T17657-1999. 8
8.14 Cyclic performance determination
GB/T 11718 1999
Wet cyclic performance determination is carried out according to the method specified in 4.25 of GB/T17657-19998.15 Boiling test
8.15.1 Principle
Determine the internal bonding strength of the test piece after boiling in boiling water and drying8.15.2 Instrument
8.15.2.1 Vernier caliper with an accuracy of 0.1 mm. 8.15.2.2 Timber square mechanical testing machine with an accuracy of 10N8.15.2.3 Water tank,
8.15.2.4 Heating device. 8.15.2.5 Convection drying in air oven, constant temperature, recording sensitivity ±1°C, temperature range 40~200°C 8.15.3 Dimensions of test piece Length i=50 mm±1
8.15.4 Method 8.15.4.1 Measurement of test piece 8.15.4.2 Boil the test piece in boiling water for 2
-50mm±1mm
length and width (see 20±2) in water. Slowly heat to 100°C within 1~2h and start timing when the temperature reaches 100r. Then keep the distance between the test pieces at least
5mm at 1
to allow water to penetrate into the test piece. The test piece can expand arbitrarily. After boiling in boiling water for 2 hours, take the test piece out of the air convection drying oven and immediately put it in a water towel at (2±2)℃ to cool for 1 hour. After cooling, take out the test piece, wipe it, and dry it flat in (0 ± 2 for 16 h ± 1
8.15.4.3 After drying, take out the test piece and cool it to room temperature. Sand the surface of the test piece lightly with fine paper, and stick the test piece to the lower head of the card with hot melt adhesive to test the internal bonding strength (see 8.6). 8.15.5 Calculate the internal bonding degree according to the results. The size of the test piece is calculated before boiling. 8.15.5.1 The internal bonding strength of 8
boards after boiling is the arithmetic mean of the internal bonding degrees of all test pieces of the same board after boiling, accurate to 0. 01 MPa.
GB/T11718 --1999
Appendix A
(Appendix to the standard)
Main physical and mechanical properties requirements of moisture-proof board (MDF.H) and outdoor board (MDF.E)A1 Table A1 The main physical and mechanical performance indicators of moisture-proof panels are specified. Table A1 Main physical and mechanical performance indicators of moisture-proof panels Unit
Water absorption thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Water absorption thickness expansion rate
(Method 1 Wet cycle
Performance determination)
Internal bonding strength
(Method 1; apparent cycle MPa
Performance determination)
Internal bonding strength
(Method 2. Boiling test MPa
1. 8-2. 5Www.bzxZ.net
22.5~~4,0
Nominal thickness range, mm
A2 Table A2 specifies the main physical and mechanical properties of outdoor panels. 10
12~19>1930
Table A2 Main physical and mechanical properties of outdoor panels Nominal thickness range, mm
Water absorption Thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Internal bonding strength
(Foshan test)
1. 8 -~ 2. 5
2. 5-~ 4. 0
>9~12 >12~19
30--45
>30-4550
20h+50
Figure 3 Schematic diagram of specimen preparation
Size and quantity of specimens
Size of specimens, mm
100×100
100×100
50×50
Number of specimens check
Specimen!
Sample 2
Unit: mm
Unit: mm
Test performance
Static bending strength and elastic mold
Screw holding force
Table 2 Combination strength
Sand content
Surface absorption performance
Dimensional stability
Formaldehyde emission
Specimen size.mm
GB/T11718—1999
Table 10 (Complete)
Number of specimens
Length 20 fifty 50 (not less than
150mm), width 50
150×50
50×50
300×100
8.3 Density determination
8.3.1 Density measurement
3 vertical and horizontal
6 on the board surface
9 on the board
200g
3 vertical
6 on the line floor
-1999 according to the method specified in 4.2
GB/T 17657-
8.3.2 Density deviation 4p (%) in the board shall be calculated according to the formula (1+, accurate to 0.1% where: 0
Density deviation, %,
Density, g/cm*
Reference density, g/cm*
Average density.g/cm.
8.4 Moisture content measurement
40)x
Moisture content measurement/The method specified in 4.3 of T17657-1999 8.5 Water absorption thickness expansion test Water absorption thickness expansion chamber test According to GB/T17667 8.6 Internal bonding strength test Internal bonding strength test According to GB/T17657 1999 4.5 method. Drift time 24h ± 5min, 4.8 method. 8.7 Static flexural strength and elastic modulus Static flexural strength and elastic modulus test According to GB/T17657 1999 4.9 method. 8.8 Screw holding force determination
Screw holding force determination shall be carried out in accordance with the method specified in 4-10 of GB/T17657-1999. 8.9 Formaldehyde release determination
Formaldehyde release determination shall be carried out in accordance with the method specified in 4.11 of GB/T17657-1999. 8.10 Surface bonding strength determination
Surface bonding strength determination shall be carried out in accordance with the method specified in 4.13 of GB/T17657-1999. 8.11 Surface absorption performance determination shall be carried out in accordance with the method specified in 4.24 of GB/T17657--1999. 8.12 Sand content determination
Sand content determination shall be carried out in accordance with the method specified in 4.28 of GB/T17657-1999. 8.13 Dimensional stability determination
Dimensional stability determination shall be carried out in accordance with the method specified in 4.34 of CB/T17657-1999. 8
8.14 Cyclic performance determination
GB/T 11718 1999
Wet cyclic performance determination is carried out according to the method specified in 4.25 of GB/T17657-19998.15 Boiling test
8.15.1 Principle
Determine the internal bonding strength of the test piece after boiling in boiling water and drying8.15.2 Instrument
8.15.2.1 Vernier caliper with an accuracy of 0.1 mm. 8.15.2.2 Timber square mechanical testing machine with an accuracy of 10N8.15.2.3 Water tank,
8.15.2.4 Heating device. 8.15.2.5 Convection drying in air oven, constant temperature, recording sensitivity ±1°C, temperature range 40~200°C 8.15.3 Dimensions of test piece Length i=50 mm±1
8.15.4 Method 8.15.4.1 Measurement of test piece 8.15.4.2 Boil the test piece in boiling water for 2
-50mm±1mm
length and width (see 20±2) in water. Slowly heat to 100°C within 1~2h and start timing when the temperature reaches 100r. Then keep the distance between the test pieces at least
5mm at 1
to allow water to penetrate into the test piece. The test piece can expand arbitrarily. After boiling in boiling water for 2 hours, take the test piece out of the air convection drying oven and immediately put it in a water towel at (2±2)℃ to cool for 1 hour. After cooling, take out the test piece, wipe it, and dry it flat in (0 ± 2 for 16 h ± 1
8.15.4.3 After drying, take out the test piece and cool it to room temperature. Sand the surface of the test piece lightly with fine paper, and stick the test piece to the lower head of the card with hot melt adhesive to test the internal bonding strength (see 8.6). 8.15.5 Calculate the internal bonding degree according to the results. The size of the test piece is calculated before boiling. 8.15.5.1 The internal bonding strength of 8
boards after boiling is the arithmetic mean of the internal bonding degrees of all test pieces of the same board after boiling, accurate to 0. 01 MPa.
GB/T11718 --1999
Appendix A
(Appendix to the standard)
Main physical and mechanical properties requirements of moisture-proof board (MDF.H) and outdoor board (MDF.E)A1 Table A1 The main physical and mechanical performance indicators of moisture-proof panels are specified. Table A1 Main physical and mechanical performance indicators of moisture-proof panels Unit
Water absorption thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Water absorption thickness expansion rate
(Method 1 Wet cycle
Performance determination)
Internal bonding strength
(Method 1; apparent cycle MPa
Performance determination)
Internal bonding strength
(Method 2. Boiling test MPa
1. 8-2. 5
22.5~~4,0
Nominal thickness range, mm
A2 Table A2 specifies the main physical and mechanical properties of outdoor panels. 10
12~19>1930
Table A2 Main physical and mechanical properties of outdoor panels Nominal thickness range, mm
Water absorption Thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Internal bonding strength
(Foshan test)
1. 8 -~ 2. 5
2. 5-~ 4. 0
>9~12 >12~19
30--45
>30-4550
20h+50
Figure 3 Schematic diagram of specimen preparation
Size and quantity of specimens
Size of specimens, mm
100×100
100×100
50×50
Number of specimens check
Specimen!
Sample 2
Unit: mm
Unit: mm
Test performance
Static bending strength and elastic mold
Screw holding force
Table 2 Combination strength
Sand content
Surface absorption performance
Dimensional stability
Formaldehyde emission
Specimen size.mm
GB/T11718—1999
Table 10 (Complete)
Number of specimens
Length 20 fifty 50 (not less than
150mm), width 50
150×50
50×50
300×100
8.3 Density determination
8.3.1 Density measurement
3 vertical and horizontal
6 on the board surface
9 on the board
200g
3 vertical
6 on the line floor
-1999 according to the method specified in 4.2
GB/T 17657-
8.3.2 Density deviation 4p (%) in the board shall be calculated according to the formula (1+, accurate to 0.1% where: 0
Density deviation, %,
Density, g/cm*
Reference density, g/cm*
Average density.g/cm.
8.4 Moisture content measurement
40)x
Moisture content measurement/The method specified in 4.3 of T17657-1999 8.5 Water absorption thickness expansion test Water absorption thickness expansion chamber test According to GB/T17667 8.6 Internal bonding strength test Internal bonding strength test According to GB/T17657 1999 4.5 method. Drift time 24h ± 5min, 4.8 method. 8.7 Static flexural strength and elastic modulus Static flexural strength and elastic modulus test According to GB/T17657 1999 4.9 method. 8.8 Screw holding force determination
Screw holding force determination shall be carried out in accordance with the method specified in 4-10 of GB/T17657-1999. 8.9 Formaldehyde release determination
Formaldehyde release determination shall be carried out in accordance with the method specified in 4.11 of GB/T17657-1999. 8.10 Surface bonding strength determination
Surface bonding strength determination shall be carried out in accordance with the method specified in 4.13 of GB/T17657-1999. 8.11 Surface absorption performance determination shall be carried out in accordance with the method specified in 4.24 of GB/T17657--1999. 8.12 Sand content determination
Sand content determination shall be carried out in accordance with the method specified in 4.28 of GB/T17657-1999. 8.13 Dimensional stability determination
Dimensional stability determination shall be carried out in accordance with the method specified in 4.34 of CB/T17657-1999. 8
8.14 Cyclic performance determination
GB/T 11718 1999
Wet cyclic performance determination is carried out according to the method specified in 4.25 of GB/T17657-19998.15 Boiling test
8.15.1 Principle
Determine the internal bonding strength of the test piece after boiling in boiling water and drying8.15.2 Instrument
8.15.2.1 Vernier caliper with an accuracy of 0.1 mm. 8.15.2.2 Timber square mechanical testing machine with an accuracy of 10N8.15.2.3 Water tank,
8.15.2.4 Heating device. 8.15.2.5 Convection drying in air oven, constant temperature, recording sensitivity ±1°C, temperature range 40~200°C 8.15.3 Dimensions of test piece Length i=50 mm±1
8.15.4 Method 8.15.4.1 Measurement of test piece 8.15.4.2 Boil the test piece in boiling water for 2
-50mm±1mm
length and width (see 20±2) in water. Slowly heat to 100°C within 1~2h and start timing when the temperature reaches 100r. Then keep the distance between the test pieces at least
5mm at 1
to allow water to penetrate into the test piece. The test piece can expand arbitrarily. After boiling in boiling water for 2 hours, take the test piece out of the air convection drying oven and immediately put it in a water towel at (2±2)℃ to cool for 1 hour. After cooling, take out the test piece, wipe it, and dry it flat in (0 ± 2 for 16 h ± 1
8.15.4.3 After drying, take out the test piece and cool it to room temperature. Sand the surface of the test piece lightly with fine paper, and stick the test piece to the lower head of the card with hot melt adhesive to test the internal bonding strength (see 8.6). 8.15.5 Calculate the internal bonding degree according to the results. The size of the test piece is calculated before boiling. 8.15.5.1 The internal bonding strength of 8
boards after boiling is the arithmetic mean of the internal bonding degrees of all test pieces of the same board after boiling, accurate to 0. 01 MPa.
GB/T11718 --1999
Appendix A
(Appendix to the standard)
Main physical and mechanical properties requirements of moisture-proof board (MDF.H) and outdoor board (MDF.E)A1 Table A1 The main physical and mechanical performance indicators of moisture-proof panels are specified. Table A1 Main physical and mechanical performance indicators of moisture-proof panels Unit
Water absorption thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Water absorption thickness expansion rate
(Method 1 Wet cycle
Performance determination)
Internal bonding strength
(Method 1; apparent cycle MPa
Performance determination)
Internal bonding strength
(Method 2. Boiling test MPa
1. 8-2. 5
22.5~~4,0
Nominal thickness range, mm
A2 Table A2 specifies the main physical and mechanical properties of outdoor panels. 10
12~19>1930
Table A2 Main physical and mechanical properties of outdoor panels Nominal thickness range, mm
Water absorption Thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Internal bonding strength
(Foshan test)
1. 8 -~ 2. 5
2. 5-~ 4. 0
>9~12 >12~19
30--45
>30-458.5 Water absorption thickness expansion test Water absorption thickness expansion chamber test According to GB/T17667 8.6 Internal bonding strength test Internal bonding strength test According to GB/T17657 1999 4.5 method. Drift time 24h ± 5min, 4.8 method. 8.7 Static flexural strength and elastic modulus Static flexural strength and elastic modulus test According to GB/T17657 1999 4.9 method. 8.8 Screw holding force determination
Screw holding force determination shall be carried out in accordance with the method specified in 4-10 of GB/T17657-1999. 8.9 Formaldehyde release determination
Formaldehyde release determination shall be carried out in accordance with the method specified in 4.11 of GB/T17657-1999. 8.10 Surface bonding strength determination
Surface bonding strength determination shall be carried out in accordance with the method specified in 4.13 of GB/T17657-1999. 8.11 Surface absorption performance determination shall be carried out in accordance with the method specified in 4.24 of GB/T17657--1999. 8.12 Sand content determination
Sand content determination shall be carried out in accordance with the method specified in 4.28 of GB/T17657-1999. 8.13 Dimensional stability determination
Dimensional stability determination shall be carried out in accordance with the method specified in 4.34 of CB/T17657-1999. 8
8.14 Cyclic performance determination
GB/T 11718 1999
Wet cyclic performance determination is carried out according to the method specified in 4.25 of GB/T17657-19998.15 Boiling test
8.15.1 Principle
Determine the internal bonding strength of the test piece after boiling in boiling water and drying8.15.2 Instrument
8.15.2.1 Vernier caliper with an accuracy of 0.1 mm. 8.15.2.2 Timber square mechanical testing machine with an accuracy of 10N8.15.2.3 Water tank,
8.15.2.4 Heating device. 8.15.2.5 Convection drying in air oven, constant temperature, recording sensitivity ±1°C, temperature range 40~200°C 8.15.3 Dimensions of test piece Length i=50 mm±1
8.15.4 Method 8.15.4.1 Measurement of test piece 8.15.4.2 Boil the test piece in boiling water for 2
-50mm±1mm
length and width (see 20±2) in water. Slowly heat to 100°C within 1~2h and start timing when the temperature reaches 100r. Then keep the distance between the test pieces at least
5mm at 1
to allow water to penetrate into the test piece. The test piece can expand arbitrarily. After boiling in boiling water for 2 hours, take the test piece out of the air convection drying oven and immediately put it in a water towel at (2±2)℃ to cool for 1 hour. After cooling, take out the test piece, wipe it, and dry it flat in (0 ± 2 for 16 h ± 1
8.15.4.3 After drying, take out the test piece and cool it to room temperature. Sand the surface of the test piece lightly with fine paper, and stick the test piece to the lower head of the card with hot melt adhesive to test the internal bonding strength (see 8.6). 8.15.5 Calculate the internal bonding degree according to the results. The size of the test piece is calculated before boiling. 8.15.5.1 The internal bonding strength of 8
boards after boiling is the arithmetic mean of the internal bonding degrees of all test pieces of the same board after boiling, accurate to 0. 01 MPa.
GB/T11718 --1999
Appendix A
(Appendix to the standard)
Main physical and mechanical properties requirements of moisture-proof board (MDF.H) and outdoor board (MDF.E)A1 Table A1 The main physical and mechanical performance indicators of moisture-proof panels are specified. Table A1 Main physical and mechanical performance indicators of moisture-proof panels Unit
Water absorption thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Water absorption thickness expansion rate
(Method 1 Wet cycle
Performance determination)
Internal bonding strength
(Method 1; apparent cycle MPa
Performance determination)
Internal bonding strength
(Method 2. Boiling test MPa
1. 8-2. 5
22.5~~4,0
Nominal thickness range, mm
A2 Table A2 specifies the main physical and mechanical properties of outdoor panels. 10
12~19>1930
Table A2 Main physical and mechanical properties of outdoor panels Nominal thickness range, mm
Water absorption Thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Internal bonding strength
(Foshan test)
1. 8 -~ 2. 5
2. 5-~ 4. 0
>9~12 >12~19
30--45
>30-458.5 Water absorption thickness expansion test Water absorption thickness expansion chamber test According to GB/T17667 8.6 Internal bonding strength test Internal bonding strength test According to GB/T17657 1999 4.5 method. Drift time 24h ± 5min, 4.8 method. 8.7 Static flexural strength and elastic modulus Static flexural strength and elastic modulus test According to GB/T17657 1999 4.9 method. 8.8 Screw holding force determination
Screw holding force determination shall be carried out in accordance with the method specified in 4-10 of GB/T17657-1999. 8.9 Formaldehyde release determination
Formaldehyde release determination shall be carried out in accordance with the method specified in 4.11 of GB/T17657-1999. 8.10 Surface bonding strength determination
Surface bonding strength determination shall be carried out in accordance with the method specified in 4.13 of GB/T17657-1999. 8.11 Surface absorption performance determination shall be carried out in accordance with the method specified in 4.24 of GB/T17657--1999. 8.12 Sand content determination
Sand content determination shall be carried out in accordance with the method specified in 4.28 of GB/T17657-1999. 8.13 Dimensional stability determination
Dimensional stability determination shall be carried out in accordance with the method specified in 4.34 of CB/T17657-1999. 8
8.14 Cyclic performance determination
GB/T 11718 1999
Wet cyclic performance determination is carried out according to the method specified in 4.25 of GB/T17657-19998.15 Boiling test
8.15.1 Principle
Determine the internal bonding strength of the test piece after boiling in boiling water and drying8.15.2 Instrument
8.15.2.1 Vernier caliper with an accuracy of 0.1 mm. 8.15.2.2 Timber square mechanical testing machine with an accuracy of 10N8.15.2.3 Water tank,
8.15.2.4 Heating device. 8.15.2.5 Convection drying in air oven, constant temperature, recording sensitivity ±1°C, temperature range 40~200°C 8.15.3 Dimensions of test piece Length i=50 mm±1
8.15.4 Method 8.15.4.1 Measurement of test piece 8.15.4.2 Boil the test piece in boiling water for 2
-50mm±1mm
length and width (see 20±2) in water. Slowly heat to 100°C within 1~2h and start timing when the temperature reaches 100r. Then keep the distance between the test pieces at least
5mm at 1
to allow water to penetrate into the test piece. The test piece can expand arbitrarily. After boiling in boiling water for 2 hours, take the test piece out of the air convection drying oven and immediately put it in a water towel at (2±2)℃ to cool for 1 hour. After cooling, take out the test piece, wipe it, and dry it flat in (0 ± 2 for 16 h ± 1
8.15.4.3 After drying, take out the test piece and cool it to room temperature. Sand the surface of the test piece lightly with fine paper, and stick the test piece to the lower head of the card with hot melt adhesive to test the internal bonding strength (see 8.6). 8.15.5 Calculate the internal bonding degree according to the results. The size of the test piece is calculated before boiling. 8.15.5.1 The internal bonding strength of 8
boards after boiling is the arithmetic mean of the internal bonding degrees of all test pieces of the same board after boiling, accurate to 0. 01 MPa.
GB/T11718 --1999
Appendix A
(Appendix to the standard)
Main physical and mechanical properties requirements of moisture-proof board (MDF.H) and outdoor board (MDF.E)A1 Table A1 The main physical and mechanical performance indicators of moisture-proof panels are specified. Table A1 Main physical and mechanical performance indicators of moisture-proof panels Unit
Water absorption thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Water absorption thickness expansion rate
(Method 1 Wet cycle
Performance determination)
Internal bonding strength
(Method 1; apparent cycle MPa
Performance determination)
Internal bonding strength
(Method 2. Boiling test MPa
1. 8-2. 5
22.5~~4,0
Nominal thickness range, mm
A2 Table A2 specifies the main physical and mechanical properties of outdoor panels. 10
12~19>1930
Table A2 Main physical and mechanical properties of outdoor panels Nominal thickness range, mm
Water absorption Thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Internal bonding strength
(Foshan test)
1. 8 -~ 2. 5
2. 5-~ 4. 0
>9~12 >12~19
30--45
>30-4515.5 Calculate the internal bonding strength after the test. The size of the test piece is calculated based on the size before boiling. 8.15.5.1 The internal bonding strength of 8 boards after boiling is the arithmetic mean of the internal bonding strengths of all test pieces of the same board after boiling, accurate to 0.01 MPa. GB/T11718 --1999 Appendix A (Standard Appendix) Main physical and mechanical performance requirements for moisture-proof boards (MDF.H) and outdoor boards (MDF.E) A1 Table A1 specifies the main physical and mechanical performance indicators of moisture-proof boards. Table A1 Main physical and mechanical properties of moisture-proof board Unit
Water absorption thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Water absorption thickness expansion rate
(Method 1 Wet cycle
Performance determination)
Internal bonding strength
(Method 1; apparent cycle MPa
Performance determination)
Internal bonding strength
(Method 2. Boiling test MPa
1. 8-2. 5
22.5~~4,0
Nominal thickness range, mm
A2 Table A2 specifies the main physical and mechanical properties of outdoor panels. 10
12~19>1930
Table A2 Main physical and mechanical properties of outdoor panels Nominal thickness range, mm
Water absorption Thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Internal bonding strength
(Foshan test)
1. 8 -~ 2. 5
2. 5-~ 4. 0
>9~12 >12~19
30--45
>30-4515.5 Calculate the internal bonding strength after the test. The size of the test piece is calculated based on the size before boiling. 8.15.5.1 The internal bonding strength of 8 boards after boiling is the arithmetic mean of the internal bonding strengths of all test pieces of the same board after boiling, accurate to 0.01 MPa. GB/T11718 --1999 Appendix A (Standard Appendix) Main physical and mechanical performance requirements for moisture-proof boards (MDF.H) and outdoor boards (MDF.E) A1 Table A1 specifies the main physical and mechanical performance indicators of moisture-proof boards. Table A1 Main physical and mechanical properties of moisture-proof board Unit
Water absorption thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Water absorption thickness expansion rate
(Method 1 Wet cycle
Performance determination)
Internal bonding strength
(Method 1; apparent cycle MPa
Performance determination)
Internal bonding strength
(Method 2. Boiling test MPa
1. 8-2. 5
22.5~~4,0
Nominal thickness range, mm
A2 Table A2 specifies the main physical and mechanical properties of outdoor panels. 10
12~19>1930
Table A2 Main physical and mechanical properties of outdoor panels Nominal thickness range, mm
Water absorption Thickness expansion rate
Internal bonding strength
Static bending strength
Elastic modulus
Internal bonding strength
(Foshan test)
1. 8 -~ 2. 5
2. 5-~ 4. 0
>9~12 >12~19
30--45
>30-45
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