Aromatic polyimide film and process for the preparation of the s

Details Aromatic polyimide film and process for the preparation of the s Aromatic polyimide film and process for the preparation of the s

1988-08-22

1990-04-10

McCamish, Marion C.

Plastic and nonmetallic article shaping or treating: processes

Forming continuous or indefinite length work

By casting liquids on a solid supporting or shaping surface

4284735, 428910, B29D 700

Patent

active

049158945

ABSTRACT:
Disclosed is an aromatic polyimide film which is well resistant to sagging and dimensional change in the heat treatment. The aromatic polyimide film is formed from a polymer solution which is produced by a polymerization reaction of a biphenyltetracarboxylic acid component and a phenylenediamine component, and characterized in that any rectangle optionally supposed within the film has a ratio between a length of any side and a length of the central portion between the side and a side opposite thereto is in the range of 100:100 to 100:100.15, and a heat shrinkage ratio of the film is not more than 0.3% (0.003) in any direction after the film is heated at 300.degree. C. for 2 hours. A process for the preparation of the above aromatic polyimide film is also disclosed.

REFERENCES:
patent: 4725484 (1988-02-01), Kumagawa

Affiliated with

Also associated with

Rating

Aromatic polyimide film and process for the preparation of the s does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Aromatic polyimide film and process for the preparation of the s, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aromatic polyimide film and process for the preparation of the s will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2298128