Preparation of laminated structures by thermoforming

Details Preparation of laminated structures by thermoforming Preparation of laminated structures by thermoforming

1989-08-21

1990-07-17

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Producing multilayer work or article

264512, 264522, 264546, B29C 5110, B29C 5142

Patent

active

049420127

ABSTRACT:
Thermoplastic layers are vacuum thermoformed to produce laminated structures by perforating all layers to be formed except the layer outermost from the mold. Thus, the non-perforated layer is attracted to the mold, serving as a diaphragm for the other layers or consolidating therewith to form the desired article.

REFERENCES:
patent: 2978376 (1961-04-01), Hulse
patent: 3161705 (1964-12-01), Kindseth et al.
patent: 4116736 (1978-09-01), Sanson et al.
Gruenwald, Dr. G., P.E., Thermoforming a Plastic Processing Guide, 1987, pp. 37-39 and 134 and 135.

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