Stock material or miscellaneous articles – Structurally defined web or sheet – Including components having same physical characteristic in...
Patent
1986-12-15
1988-11-29
Herbert, Thomas J.
Stock material or miscellaneous articles
Structurally defined web or sheet
Including components having same physical characteristic in...
1563082, 428220, 4284735, B32B 702, B32B 2708
Patent
active
047880988
ABSTRACT:
An aromatic polyimide laminate sheet having a relatively large thickness of 50 .mu.m or more comprises (1) at least one first film layer comprising a polymerization-imidization product of an acid component containing 80 to 100 molar % of at least one biphenyltetracarboxylic acid with an amine component containing 80 to 100 molar % of at least one aromatic diamine having two or more benzene rings, and having a glass transition point of 250.degree. C. to 350.degree. C.; and (2) at least one second film layer comprising an aromatic imide polymer, the first and second film layers being alternately laminated on and directly bonded to each other without using bonding material.
REFERENCES:
patent: 4543295 (1985-09-01), St Clair et al.
Mori Hiroaki
Sado Takahiko
Herbert Thomas J.
Ube Industries, Inc.
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