This standard applies to polytetrafluoroethylene sheets formed by compression molding or sheets made by turning or rolling blanks formed by compression molding or hydraulic molding (hereinafter referred to as "sheets"). QB/T 3625-1999 Polytetrafluoroethylene sheets QB/T3625-1999 Standard download decompression password: www.bzxz.net

Classification number G33
Light Industry Standard of the People's Republic of China
QB/T3625-1999
Polytetrafluoroethylene sheet
Published on 1999-04-21
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Implementation on 1999-04-21
State Bureau of Light Industry
QB/T3625--1999
This standard is The original light industry professional standard ZB/TG33002-1985 "Tetraethylene Sheet" was converted into QB3625-1999 through the National Light Industry Bank [1999] No. 112 document, with the same content as before. This standard was proposed by the former Ministry of Light Industry of the People's Republic of China. This standard is under the jurisdiction of the National Plastic Products Standardization Center. This standard was drafted by Shanghai Chemical Plant, Shanghai Plastics Research Institute, Moguang Chemical Research Institute Third Factory, Wuhan Plastics Factory No. 5. People: Yu Meiling, Xu Yuewei, Liu Songlin, Wang Huizang, Yang XuefenCAD
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Light Industry Standard of the People's Republic of China
Polytetrafluoroethylene sheet
QB/T3625—1999
Replace ZB/TG33002—1985
This standard applies to polytetrafluoroethylene formed by compression molding Ethylene sheet or sheet made by turning or rolling rough molded by molding or hydraulic method (hereinafter referred to as "sheet"). 1 Classification
SFB-—1
Mainly used for electrical insulation.
Mainly used as lining, seal and lubricating material in corrosive media. Mainly used as diaphragm and sight glass in corrosive media. The outer dimensions and allowable tolerances of the sheet shall comply with the provisions of Table 1. Table
Original Dimensions||t t||Approved by the State Bureau of Light Industry on April 21, 1999
10001200,1500
60,90,120,
150,200250
300,600,
1000.1200,1500
60.90,120.
[50,200,250.
300,600.| |tt||1000, 1200, 1500
60, 90, 120
150, 200, 25D,
1000, 1200, 1500
60, 90, 120.
150, 200, 250.
300, 600,
1000, 1200, 1500
jun 500
≥500
100、120、140.
160、180,200
1999-04-21Implementation
Thickness tolerance
QB/T3625-1999
Table 1 (Continued 1)
60、90,120
150.200、250.
300、600.
1000、 1200, 1500
60, 90, 120.
150, 200, 250.
1000, 1200, 1500
60, 90, 120 ,
150.200,250.
300, 600,
1000, 1200, 1500
60, 90120.
130. 200. 250.
300, 600,
1000.1200,1500
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100.120, 140
160, 180.2 00
100, 120, 140
160.180.200
100, 120, [40
160, [80,200
Thickness tolerance
QB/r 3625-1999
Table 1 (Continued 2)
60, 90, 120,
150, 200, 250,
1000, 1200, 1500
Thickness tolerance
QE/T 3625-1999
QE/T 1 (Continued 3)
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Thickness tolerance
QB/T3625-1999
Table 1 (Continued 4)
Thickness tolerance
QB/T 3625-1999
Table 1 (Continued 5)
For credit only
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Hundred 450
Thickness tolerance
QB/T3625-1999
1 (Continued 6)
Thickness tolerance
QBFr3625-f999
Table 1 (Continued)
Note, 1 "Diameter" refers to the diameter of the round plate. 2. Special specifications can be negotiated by both parties. 3 Technical requirements
3.1 Appearance
3.1.1 The color of the plate is the natural color of the period.
3.1.2 The surface of the plate should be smooth, and no condensation lines, bubbles, or delamination are allowed. Mechanical damage that affects the use, board surface knife marks and other defects are not allowed.
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QB/T 3625-1999
SFB-1: No metal impurities are allowed in the middle, but no more than 1 non-metallic impurity with a diameter of 0.1mm~0.5mm is allowed to exist on an area of ​​10cm×10cm, and no more than 1 non-metallic impurity with a diameter of 0.5mm~2mm is allowed to exist on the board surface. No more than 1 metal impurity with a diameter of 0.5mm, no more than 3 non-metallic impurities with a diameter of 0.5mm~-2mm are allowed to exist on the board surface. No more than 1 spot with a mutual diameter of 2mn~3m. 3.2 Performance
The performance of the plate shall comply with the provisions of 2.
Tensile strength
Double elongation at break
Withstand voltage
4 Test method
4.1 Measurement of overall dimensions
4.1.1 Thickness
The thickness of the plate shall be measured with a ruler with an accuracy of 0.02mm. 4.1.2 Length and width
2.10~-2.30
≥150
2. 10~2.30
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The length and width of the plate shall be measured with a steel ruler or tape measure with an accuracy of 1mm
4.2 Appearance
Inspect visually under natural light. 4.3 Determination of specific gravity
2.10~2.30
According to the original GB1033-1970 "Test Method for Specific Gravity of Plastics". During the test, a small amount of wetting agent was added to the distilled water. 4.4 Determination of tensile strength and elongation at break 4.4.1 Test conditions
Temperature is (23±2)℃, relative humidity is 45%~55%, and the stack is placed for more than 8 hours. According to the original GB1040-1979 "Plastic Tensile Test Method", IⅢ type specimens are used. For plates with a thickness of no more than 2mm, five specimens are punched on the plate. If it is a turned plate, five specimens are punched along the longitudinal direction of the plate: the original thickness of the plate is used as the thickness of the specimen. For plates with a thickness greater than 2mm, a standard sample with a thickness of (2±0.2)mm should be pressed (see Appendix A for pressing conditions), and five specimens are punched. The mutual movement speed of the two fixtures on the testing machine is (100±10)mm/min. 4.5 Withstand voltage determination
4.5.1 Electrode
The electrodes used for the test are shown in Figure 1.
4.5.2 The specimen
is a disc with a diameter of not less than 50mm, or a square with a side length of 50mm. There are three specimens. 4.5.3 Test steps
The electrodes are placed in the transformer oil, and the specimen is placed between the electrodes. Within 0s10s: after the industrial frequency AC voltage is increased to the specified value (Table 3), it is maintained for 1min, and the specimen is observed to see whether it breaks down. If there is no breakdown phenomenon in the specimen, it is qualified, otherwise it is unqualified. The three specimens must meet the specified values ​​for the test. This test is not carried out for plates with a thickness greater than 111. 9
5 Inspection rules
Specimen thickness
QB/T3625—1999
Unit: mm
5.1. The inspection is carried out in batches, and the boards produced continuously by the same batch of raw materials and the same process are regarded as a batch. ky
5.2 During the inspection, the dimensions and appearance of each piece or roll of the board shall be checked according to Chapter 2 and 3.1, and the batch shall be tested according to Items 2 and 3 of 3.2. During the test, if one item does not meet the requirements of this standard, a new sample with double the surplus shall be taken and the unqualified item shall be retested. If the retest result shows that the item is still unqualified, the batch shall be unqualified. 5.3 According to Items 1 and 4 of 3.2, typical tests shall be carried out every three months. If the process or formula changes, the test shall be carried out in time. B. Marking, packaging, transportation and storage
6.1 Marking
Each piece of film packaging shall be attached with a label indicating the product brand, specification, batch number and net weight. Each batch of boards shall be accompanied by a quality inspection certificate. 2. Packaging
Boards are generally packed in plastic film bags and placed in thick cardboard boxes or wooden boxes. 6.3 Transportation
Should be protected from impact, pressure, sun and rain.
6.4 Storage
The boards should be packed and stored in a clean and dry warehouse. 10
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