This standard specifies the model, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of modified polyester impregnating varnish. This standard applies to modified polyester impregnating varnish made by dissolving modified polyester resin and butanol modified cresol formaldehyde resin in organic solvent xylene. JB/T 7094-1993 Modified polyester impregnating varnish JB/T7094-1993 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Modified polyester impregnating varnish
Subject content and scope of application
JB/T7094—1993
This standard specifies the model, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of modified polyester impregnating varnish. This standard is applicable to modified polyester impregnating varnish compounded by modified polyester resin and butanol-modified cresol formaldehyde resin dissolved in the organic solvent xylene.
Cited standards
GB1981
GB10579
GB11027
Product model
Test method for solvent-containing insulating varnish
General rules for inspection, packaging, marking, storage and transportation of solvent-containing insulating varnish Technical conditions for thermosetting impregnating varnish
The model of modified polyester impregnating varnish is 1040. 4
Technical requirements
The technical requirements for 1040 modified polyester impregnating varnish shall comply with the provisions of Table 1. Table 1
Indicator name
Viscosity, No. 4 viscometer, (23±1)℃
Volume content, (105±2)℃, 2hbzxz.net
Thick layer curing ability
Stability of paint in bulk container
Effect of paint on enameled wire
Volume resistivity
(1) Before immersion, (23±2)℃
(2) After immersion for 7d
Electrical strength
(1) Before immersion, (23±2)C
(2) After immersion for 24h
(3) (155±2)℃
Solvent vapor resistance, (23±2)℃ after 7d
Elasticity, mandrel diameter 3mm
Temperature index
|Approved by the Ministry of Machinery Industry on October 8, 1993
Indicator value
The paint should be a uniform transparent liquid, free of mechanical impurities, and the paint film should be smooth after drying 35±10
Agreed by both parties
Not worse than S1U114.2, uniform
Viscosity growth value is not greater than 4 times the nominal value
Pencil hardness is not softer than H
≥>1.0×10*
≥1.0×10
No change in adhesion, no peeling, no bubbling, no sagging, no stickiness (slight stickiness is allowed), at least two solvent tests passed without cracking
Implemented on January 1, 1994
5 Test method
Appearance: According to Appendix A of GB1981.
The appearance of the paint liquid shall be carried out according to Article A1.
Appearance of paint film: according to A2.
5.2Viscosity: according to Appendix B of GB1981. JB/T7094—1993
5.3Solid content: according to Article 2.3 of GB1981. 5.4Flash point: according to Article 2.5 of GB1981. 5.5Thick layer curing ability: according to Article 2.7 of GB1981. The baking conditions are to increase the temperature at a rate of 10℃/20min, keep it at (120±2)℃ for 6h, and then increase the temperature to (150±2)℃ and keep it for 16h. 5.6Stability of paint in the hot container: according to Article 2.10 of GB1981. The added solvent is xylene-butanol solvent, and the ratio is xylene:butanol=4:1.
Effect of paint on enameled wire: According to Article 2.11 of GB1981, use 155 grade enameled wire with a diameter of 1.0mm. 5.7
5.8Volume resistivity: According to Article 3.4 of GB1981. The conditions for preparing the paint film are: drying for 3h after the first immersion, drying for 6h after the second immersion, and the drying temperature is (160±2)℃. 5.9Electrical strength: According to Article 3.5 of GB1981. The conditions for preparing the paint film are the same as Article 5.8 of this standard. 5.10Solvent vapor resistance: According to Appendix E of GB1981. Glass cloth is selected as the substrate, and the conditions for preparing the paint film are the same as Article 5.8 of this standard. Elasticity: According to Article 3.1 of GB1981. The conditions for preparing the paint film are: drying for 3h after the first immersion, drying for 3h after the second immersion, and the drying temperature is (160±2)℃. Paint film baking conditions: (180 ± 2) ℃, 30h. Temperature index: in accordance with the "Note" specified in GB11027. 5.12
Inspection rules
The factory test items are 1, 2, 3, 8 (1) and 9 (2) in Table 1 of this standard. 6.1
6.2 Type test items are 1 to 11 in Table 1 of this standard. The temperature index is a product identification test item. Other items should comply with the relevant provisions of Chapter 2 of GB10579.
Marking, packaging, transportation, storage
In accordance with the relevant provisions of Chapters 3 and 4 of GB10579. Additional remarks:
This standard was 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 was drafted by Xi'an Insulating Materials Factory and participated in by Dongfang Insulating Materials Factory. The main drafters of this standard are Liu Jiwu, Diao Chengyu and Zhao Hong. 533
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