Flexible plastic foam

Details Flexible plastic foam Flexible plastic foam

1978-05-30

1980-05-06

Van Balen, William J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including variation in thickness

428310, 521918, B32B 312, B32B 326

Patent

active

042018188

ABSTRACT:
A flexible and foldable foam plastic sheet and a process for making same, said process comprising initially compressing the foam sheet between two surfaces at least one of which is a textured surface (e.g., screen like) to reduce the sheet in thickness and reduce or destroy the resilience of the foam, and then, when further reduction in thickness of the resulting sheet is desired, pressing the resulting compressed sheet between two substantially smooth surfaces to achieve such desired further reduction in thickness. Mechanical properties of the foam sheet so processed are desirably increased, thereby producing a foam sheet product suitable as a replacement for paper in many applications.

REFERENCES:
patent: 1376321 (1921-04-01), Crozier
patent: 3016317 (1962-01-01), Brunner
patent: 3054146 (1962-09-01), Griffin
patent: 3137611 (1964-06-01), Krolik
patent: 3159700 (1964-12-01), Nakamura
patent: 3189243 (1965-06-01), Lux
patent: 3222437 (1965-12-01), Schilling
patent: 3285800 (1966-11-01), Bartell et al.
patent: 3384531 (1968-05-01), Parrish
patent: 3471604 (1969-10-01), Butcher
patent: 3577507 (1971-05-01), Corbett
patent: 3649398 (1972-03-01), Keith
patent: 3876494 (1975-04-01), Ogawa et al.
patent: 4078959 (1978-03-01), Palfey et al.

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