Title: Flexible plastic foam

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.

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Inventors: Rohn, Charles L. (Bridgewater, NJ, US)

Application Number: 910932
Filing Date: 1978-05-30
Publication_date: 1980-05-06
Assignee: Mobil Oil Corporation (New York, NY)
Primary Class(es): 428/159 428/314.2, 521/918
Other Classes:
US Patent Ref:

1376321	Apr, 1921	Crozier	264/293.
3016317	Jan, 1962	Brunner	428/159.
3054146	Sep, 1962	Griffin	264/321.
3137611	Jun, 1964	Krolik	264/321.
3159700	Dec, 1964	Nakamura	264/321.
3189243	Jun, 1965	Lux	156/79.
3222437	Dec, 1965	Schilling	428/310.
3285800	Nov, 1966	Bartell et al.	428/159.
3384531	May, 1968	Parrish	264/321.
3471604	Oct, 1969	Butcher	264/163.
3577507	May, 1971	Corbett	264/321.
3649398	Mar, 1972	Keith	428/122.
3876494	Apr, 1975	Ogawa et al.	428/310.
4078959	Mar, 1978	Palfey et al.	264/321.

Other Refs:
Primary Examiner: Van Balen, William J.
Assistant Examiner:
Attorney: Huggett; Charles A., Cier; Ronald J.