JB/T 7771-1995 Epoxy low solvent impregnation varnish

This standard specifies the product model, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of epoxy low-solvent impregnation varnish. This standard is applicable to Class B epoxy low-solvent impregnation varnish with a solid content of not less than 70% made of E-type epoxy resin and vegetable oil acid dissolved in organic solvent. JB/T 7771-1995 Epoxy low-solvent impregnation varnish JB/T7771-1995 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T 7771-1995
Epoxy low-solvent impregnation varnish
Issued on October 9, 1995
Ministry of Machinery Industry of the People's Republic of China
Implementation on January 1, 1996
Machinery Industry Standard of the People's Republic of China
Epoxy low-solvent impregnation varnish
1 Subject content and scope of application
JB/T7771-1995
This standard specifies the product model, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of epoxy low-solvent impregnation varnish.
This standard applies to Class B epoxy low-solvent impregnation varnish with a solid content of not less than 70% formed by dissolving E-type epoxy resin and vegetable oil anhydride in organic solvent.
Cited Standards
GB1981-89
GB10579-89
GB11027-89
Product Model
Test Methods for Solvent-Containing Insulating Varnish
Rules for Inspection, Packaging, Marking, Storage and Transportation of Solvent-Containing Insulating Varnish Technical Conditions for Thermosetting Impregnation Varnish
The model of epoxy low-solvent impregnation varnish is 1034. Technical Requirements
The technical requirements of epoxy low-solvent impregnation varnish shall comply with the provisions of Table 1. 5 Test Methods
Appearance, viscosity, solid content, flash point
According to Appendix A, Appendix B and Articles 2.3 and 2.5 of GB1981 respectively. 5.2 Thick layer curing ability
According to Article 2.7 of GB1981. Drying conditions are to keep at 80±2℃ for 1h and then raise the temperature to 150±2℃ for 2h. The amount of paint is determined by the solid content, as shown in Table 2.
5.3 Stability of paint in bulk container
According to Article 2.10 of GB1981. The solvent added during the test should be the same solvent used for paint making. 5.4 Effect of paint on enameled wire Www.bzxZ.net
According to Article 2.11 of GB1981. QZ-2/130 polyester enameled wire with a nominal diameter of 1.000mm was selected. 5.5 Elasticity
According to Article 3.1 of GB1981. The drying condition for sample preparation is 145±2℃, 6h; the baking condition for test is 150±2℃, 96h.
Approved by the Ministry of Machinery Industry on October 9, 1995
Implemented on January 1, 1996
Viscosity, No. 4 viscometer, 23±1℃
Solid content, 145±2℃, 2b
Thick layer curing ability
Stability value of paint in the container
Continuous effect on enameled wire||t t||Volume resistivity
.Normal
b.After 7 days of immersion
Electrical strength
b.After 24 hours of immersion
c.130±2℃
Resistance to melting vapor (benzene, acetone, methanol, hexane, carbon dioxide), after 7 days of exposure at 23±2℃
Long-term heat resistance
Temperature index
Solid content of the tested paint
JB/T 77711995
The paint should be a transparent liquid without mechanical impurities and insoluble particles. The cured paint film should be flat and smooth
Volume resistivity, electrical strength, solvent vapor resistance 20- 60
To be agreed upon by the supply and demand parties
Not inferior to S1, U1.I4.2Uniform
Viscosity increase value is not more than 4 times of the initial value
Pencil hardness is not softer than H
No cracking
>1X1012
≥1×10l0
No change in adhesion, no residue, no bubbling, no sagging, no stickiness (or slightly sticky), at least two of the five solvent tests passed>130
Perform according to Article 3.4.3.5 and Appendix E of GB1981 respectively. The sample preparation is carried out in accordance with Article 3.4.2 of GB1981. The viscosity is adjusted with the same solvent used for paint making, and a small amount of accelerator can be added if necessary; the sample baking conditions are to bake at 145±2℃ until the paint film is dry after the first dip, and bake at 145±2℃ for 6h after the second dip. 5.7 Long-term heat resistance
Carry out in accordance with the \Note
provisions in GB110Z7.
Inspection rules
The factory inspection items are 1, 2, 3, 5, 9(a) and 10(a) in Table 1. The type inspection items are 1 to 11 in Table 1, and the 12th item, long-term heat resistance, is a product identification and finalization test item. Others should comply with the relevant provisions of Chapter 2 of GB.10579. 6.3
Marking, packaging, transportation, storage
7.1 The storage period of the paint is 6 months from the date of leaving the factory. JB/T7771-1995
Others shall comply with the relevant provisions of Chapter 3 and 4 of GB10579. 7.2
Additional Notes:
This standard is proposed by the National Technical Committee for Standardization of Insulating Materials: This standard is under the jurisdiction of the Guilin Electric Science Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Guilin Electric Science Research Institute of the Ministry of Machinery Industry. This standard was mainly drafted by Ma Linquan,
People's Republic of China
Mechanical Industry Standard
Epoxy Low Solvent Impregnation Varnish
JB/T 77711995
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Number of words XXX,XXX
Format 880×1230
Sheet X/X
Edition X, XX, 19XX
Printing X, XX, 19XX
Number of copies 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn661_ILL /F
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