Thermoformable composite sheet

Details Thermoformable composite sheet Thermoformable composite sheet

1990-02-20

1991-12-24

Cannon, James C.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428 362, 428102, 428286, 428288, 428290, B32B 100, B32B 504, B32B 2702, B32B 2712

Patent

active

050751425

ABSTRACT:
An improved thermoformable composite sheet comprises a layer of thermoplastic polymer and a lightweight stitchbonded nonwoven elastic fabric having a conformability at 180.degree. C. in the range of 4 to 9. The sheet provides articles thermoformed therefrom with improved wall thickness uniformity.

REFERENCES:
patent: 4298643 (1981-11-01), Miyagawa et al.
patent: 4415519 (1983-11-01), Strassel
patent: 4594290 (1986-06-01), Fischer et al.
patent: 4704321 (1987-11-01), Zafiroglu
patent: 4737394 (1988-04-01), Zafiroglu
patent: 4773238 (1988-09-01), Zafiroglu
patent: 4876128 (1989-10-01), Zafiroglu
patent: 4897297 (1990-01-01), Zafiroglu
Lubin, "Handbook of Composites", Van Nostrand Reinhold Co., pp. 366-367 (1982).

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