Warp-free multi-layer stampable thermoplastic sheets

Details Warp-free multi-layer stampable thermoplastic sheets Warp-free multi-layer stampable thermoplastic sheets

1979-08-16

1981-09-22

Thibodeau, Paul J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428287, 428297, 428303, 428324, 428363, 4284749, B32B 516, B32B 2704

Patent

active

042910846

ABSTRACT:
Disclosed are laminated thermoplastic sheets containing one or more pairs of thermoplastic layers wherein the total number of layers are even. Each pair is comprised of a surface layer containing a thermoplastic polymer and high aspect ratio mica flakes and a strength layer containing a thermoplastic polymer and long glass fiber. The laminated sheet is essentially warp-free with exceptionally good surface appearance, and can be stamped into a shaped article retaining these characteristics.

REFERENCES:
patent: 3158528 (1964-11-01), Brown
patent: 3539437 (1970-11-01), Kirk et al.
patent: 3684645 (1972-08-01), Temple et al.
patent: 3764456 (1973-10-01), Woodhams et al.
patent: 3799799 (1974-03-01), Woodhams
patent: 3931094 (1976-01-01), Segal et al.
patent: 4044188 (1977-08-01), Segal
patent: 4098943 (1978-07-01), Degginger et al.

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