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   Main Property of Prepreg (B-stage) for FR4

Fabric Type Resin content Gel time at Resin flow Volatile content
(%) 170°C (sec) (%) (%)
1080 64±5 180±25 37±5 ≤0.75
2116 52±4 180±25 30±4 ≤0.75
7628 44±4 180±25 25±3 ≤0.75

Main Property  for  cotton based Prepreg (B-stage) 

Resin content soluable matter volatail content
% % %
50-55 60-90

≤7.0

Main Property  for  paper based Prepreg (B-stage) 

Resin content soluable matter volatail content
% % %
46-50 75-95 ≤8.0

 
 
 
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