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Suzhou Jufeng Electrical Insulation System Co., Ltd.

Jf310s-7 Modified Polyimide Varnish manufacturer / supplier in China, offering Jf310s-7 Modified Polyimide Varnish, Epoxy-Resin Prepreg Nomex Flexible Laminates Nomex with Heat-Resistant Epoxy Resin, Rich Resin Mica Tape and so on.

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Jf310s-7 Modified Polyimide Varnish

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Product Description

1. Description
JF310S-7 Modified polyimide submerging varnish is composed of imine resin as its major content and coupled with modified resin, composite auxiliary agent and multiple solvents, etc., the products shall be stored in single component.
\JF310S-7 modified polyimide submerging varnish is a low-viscosity liquid under room temperature. The storage period of the varnish is 6 months, and cures under 160  ~ 180  , The condensate of the varnish shows excellent electric and mechanical performance as well as heat resistance.
JF310S-7 modified polyimide submerging varnish shows excellent performance in applications.It is featured in the adoption of low  using low-boiling point organic solvent, its curing reaction is a polyaddition reaction, which produces no low molecular matters. it is olso featured in low temperature and short time required for baking  the submerged motors. With a high solid content, the varnish promises a large amount of attachment and good drying in thick layers;
high adhesion strength under high temperature. Compared with similar products , this varnish is featured in excellent performance and convenient usage. Application of this varnish is found in varnish submerging treatment for coils various types of motors such as grade H and grade C insulating middle/small motors, heat resistant transformers, instrument temperature,  etc.
2. Technical parameters of the product
Names of Properties
Testing Conditions
Target Values
Target Values
Bare eye observation
Brown liquid,
No mechanical impurities
#4 viscosity meter(23±1)
Solids content
Thick layer curing capability
S1U1I4.2 homogeneous
Effects to varnished wires
Pencil hardness above H
Electric strength
Normal state
Thermal 200±2
after submerged in water for 24h
Volume resistivity
Normal state
after submerged in water for 24h
Resistance to solvent and steam
 Any one of the five solvent is proven qualified, then it shall be deemed as eligible
Not change in the adhesion, no peels, no bubbles

3.  Application process for reference
Pre-baking of the workpiece∶100 ~ 120      1h ~ 2h            
Varnish submerging∶40 ~ 50        20min~ 30min   
Varnish submerging  ≥1h
Drying∶120 ~ 130      2h ~ 3h
160 ~ 180      8h ~ 10h
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