This standard specifies the model, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of polyamine-imide laminated glass cloth sheets. This standard applies to polyamine-imide laminated glass cloth sheets made by hot pressing the surface-treated electrical alkali-free glass cloth impregnated with polyamine-imide resin. JB/T 6218-1992 Polyamine-imide laminated glass cloth sheets JB/T6218-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Polyamine-imide laminated glass cloth board
Subject content and scope of application
JB/T6218-92
This standard specifies the model, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of polyamine-imide laminated glass cloth board.
This standard is applicable to polyamine-imide laminated glass cloth board made of surface-treated electrical alkali-free glass cloth impregnated with polyamine-imide resin and hot-pressed.
Cited standards
GB1305
GB5130
GB11020
General rules for inspection, marking, packaging, transportation and storage of electrical insulating thermosetting laminatesTest methods for electrical insulating laminates
Test methods for determining the burning properties of solid electrical insulating materials after exposure to an ignition sourceGB11026.1 Guidelines for determining the heat resistance of electrical insulating materialsGeneral procedure for establishing aging test methods and evaluating test results3 Model
Model of polyamine-imide laminated glass cloth board: 32534·Technical requirements
4.1 Appearance
The surface should be smooth, free of bubbles, wrinkles and cracks, and as free as possible from other defects such as scratches, pits and uneven color. 4.2 Dimensions and limit deviations
4.2.1 Length and width
The range of nominal specifications for length and width and the limit deviations of their nominal specifications shall comply with the provisions of Table 1. Table 1
Nominal specification range for length and widthbzxz.net
450~1000
>1000~2000
4.2.2 Nominal thickness and limit deviations
Nominal thickness and limit deviations shall comply with the provisions of Table 2. 4.3 Warpage or distortion
Warpage or distortion shall comply with the provisions of Table 3.
4.4 Physical, mechanical and dielectric properties
The physical, mechanical and dielectric properties shall comply with the provisions of Table 4. Limit deviation of nominal specifications approved by the Ministry of Machinery and Electronics Industry on June 16, 1992
Implementation on January 1, 1993
Nominal thickness
JB/T6218-92
Limit deviation
Nominal thickness
Limit deviation
Note: If the non-nominal thickness is between the two nominal thicknesses listed in Table 2, its limit deviation shall adopt the limit deviation value of the next larger nominal thickness. Table 3
Warp or
When the length of the steel ruler is 1000mm
Indicator name
Bending strength (perpendicular to the layers)
Under normal conditions
Under high temperature (180±5℃)
Impact strength (notched specimen, simply supported beam method, lateral test)Withstand voltage (perpendicular to the layers)
Temperature 90±2℃ in transformer oil for 1min
Withstand voltage (parallel to the layers)
Temperature 90±2℃ in transformer oil for 1min
Insulation resistance (parallel to the layers)
After immersion in water
Dielectric loss factor (1MHz)
After submersion in water
Relative dielectric constant (1MHz)
After immersion in water
Water absorption
Flammability
Long-term heat resistance
Temperature index (TD
When the length of the steel ruler is 500mm
≥400
≥280
See Table 5
>1.0×108
See Table 6
Not less than BH:
Not less than 180
Indicator value
JB/T6218—92
3.0 and above
Indicator value
Note: The thickness in Table 5 refers to the measured average thickness. If the measured average thickness of the sample is between the two thicknesses listed in Table 5, the vertical layer direction withstand voltage indicator value is obtained by interpolation. If the measured average thickness is less than 0.5mm , the index value of 0.5mm should be used. If the thickness is greater than 3mm, process the morning pressed plate on one side to 3mm: and then conduct the test. Table 6
Indicator value ≤
22.5 (one side processed)
Note: The thickness in Table 6 refers to the measured average thickness. If the measured average thickness of the sample is between the two thicknesses listed in Table 6, the water absorption index should be obtained by interpolation. If the average thickness is less than 0.5mm, the water absorption index value of 0.5mm should be used. If the nominal thickness is 25mm and the measured average thickness is greater than 25mm, the water absorption index value of 25mm should be used. Plates with a nominal thickness greater than 25mm should be mechanically milled from one side to 22.5mm and then tested.
5 Test method|| tt||5.1 Appearance
Evaluate by visual observation.
5.2 Length and width
Use a steel ruler or steel tape with a graduation value of 1mm to measure 3 points along the length and width of the board and take the average value respectively. 5.3 Thickness
Perform in accordance with the provisions of Chapter 3 of GB5130. The thickness measurement result of the laminate is qualified if all the points tested are within the thickness limit deviation range. 5.4 Warping or distortion
Perform in accordance with the provisions of Chapter 4 of CB5130. It can also be measured with a 500mm long steel ruler. 5.5 Bending strength (vertical to the layer direction)
Perform in accordance with the provisions of Chapter 6 and Chapter 7 of GB5130. In the high temperature test, the sample is placed at 180±5℃ for 1h and tested at the same temperature of 27
.
JB/T6218-92
5.6 Impact strength (notched specimen, simply supported beam method, lateral test) shall be carried out in accordance with Article 9.2 of GB5130.
5.7 Attached voltage (perpendicular to the layer)
shall be carried out in accordance with Chapter 12 of GB5130. Before the test, the specimen shall be immersed in transformer oil at a temperature of 90±2℃ for 0.5~1h, and then the voltage shall be applied. Each specimen shall be qualified if it does not break down. 5.8 Withstand voltage (parallel to the layer)
shall be carried out in accordance with Chapter 12 of GB5130. Using plate-to-plate electrodes, the specimen shall be immersed in transformer oil at a temperature of 90±2℃ for 0.5~1h before the test, and then the voltage shall be applied.
5.9 Insulation resistance (parallel to the layer) after immersion
shall be carried out in accordance with Chapter 14 of GB5130. The sample should be treated in an oven at 50±2℃ for 24h, taken out and cooled to room temperature, and then immersed in steamed water at 23±2℃ for 24±1h. After being taken out of the water, wipe the surface of the sample with a clean cloth or filter paper immediately. The test should be completed within 2min after the sample is taken out of the water. The test conditions are temperature 25±10℃ and relative humidity not more than 75%. Calculate the average value of 2 samples in each direction, and take the group with the lower result as the test result. 5.10 Dielectric loss factor and relative dielectric constant (1MHz) shall be carried out according to the provisions of Chapter 13 of GB5130 after immersion in water. The sample is treated in steamed water at 23±2℃ for 24h, and immediately wipe the surface of the sample with a clean cloth or filter paper after being taken out of the water. The test should be completed within 20min after the sample is taken out of the water, and the average value of the 2 samples shall be taken as the test result. 5.11 Water absorption
shall be carried out according to the provisions of Chapter 11 of GB5130.
5.12 Flammability
According to Chapter 7 of GB11020.
5.13 Long-term heat resistance
According to GB11026.1.
Failure standard: bending strength (vertical to the layer), 50%. The recommended aging temperature is 200, 220, 240, 260℃. 6 Testing rules
6.1According to GB1305. The factory inspection items are 4.1, 4.2, 4.3 of this standard and 1 (normal) and 3 items in Table 4 of 4.4. Among them, 4.1, 4.2 and 4.3 are sheet-by-sheet inspection items. 6.2 Long-term heat resistance is a product identification item. 7 Marking, packaging, transportation and storage
According to GB1305.
Additional instructions:
This standard is proposed by the National Technical Committee for Standardization of Insulating Materials. This standard is under the jurisdiction of Guilin Electrical Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Dongfang Insulation Material Factory. The main drafter of this standard was Yu Baofu.
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