Laminate

Stock material or miscellaneous articles – Structurally defined web or sheet – Including variation in thickness

Patent

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Details

428167, 428172, 428188, 428212, 4283188, B32B 300

Patent

active

054786274

ABSTRACT:
A laminate comprising a core resin layer and a skin laminated integrally thereon is provided. The laminate has the projections, such as ribs, formed integral with the core resin layer with the same resin material as the core resin. Also, a hollow portion is formed in the inside of the resin layer near the intersection of the core resin layer and each projection. The laminate is free of sinks on the surface at its positions corresponding to the projections on the back side and has good appearance and excellent mechanical strength.

REFERENCES:
patent: 4968474 (1990-11-01), Ito
patent: 5034171 (1991-07-01), Kiczek
Ken C. Rusch, "Gas Assisted Injection Molding a New Technology is Commercialized" Plastic Engineering, Jul. 1989 No. 7., pp. 35-38.
Hiroe et al., Guide to Plastic Molding, p. 191.

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