Foam-containing structures

Details Foam-containing structures Foam-containing structures

1982-07-22

1984-09-11

Woo, Jay H.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Composite having voids in a component

156 90, 156245, 264 466, 264 469, 264255, 264257, 428 71, 428 76, 428160, 4283184, B28B 326, B28B 518

Patent

active

044710208

ABSTRACT:
This invention relates to a method of making a foam-containing structure which includes placing and suitably retaining a respective first shaped sheet in each of first and second complementary parts of an open mould. Each sheet includes at least one layer of fibrous material. A further respective shaped sheet is placed and suitably retained upon each first sheet. Each said further sheet comprises a layer of fibrous material and an impervious membrane adhering thereto. When the two mould parts are closed together a foamable material is introduced into a cavity formed between the sheets and is then caused to expand, whereupon each membrane is caused to adhere to its adjacent first sheet but prevents penetration of the expanding material into that sheet.

REFERENCES:
patent: 3286004 (1966-11-01), Hill et al.
patent: 4268571 (1981-05-01), McCarthy
patent: 4335182 (1982-06-01), Brand

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