Method for producing receptacles from thermoplastic resin foam s

Details Method for producing receptacles from thermoplastic resin foam s Method for producing receptacles from thermoplastic resin foam s

1973-12-07

1976-07-06

Whitby, Edward G.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

93 93HT, 156189, 156198, 156202, 156203, 156218, 156293, 1563031, 156306, 264230, 264321, 264342R, 264DIG71, B29C 2714, B29C 2720

Patent

active

039679918

ABSTRACT:
A method for producing receptacles of a thermoplastic resin foam sheet, which comprises forming a cylinder of a rectangular-shaped uni-directionally shrinkable thermoplastic resin foam sheet which, when heated, shrinks in a first direction to a greater extent than other directions perpendicular to said first direction, so that when heated, the thermoplastic resin foam sheet will shrink toward the central axis of the cylinder; bonding the side edges of the sheet forming the cylinder; heating the foam sheet on a molding form to a temperature above the softening point of the resin, whereby the cylindrical foam sheet shrinks toward the central axis of the cylinder formed by the sheet and intimately contacts the circumferential side wall of the molding form to form a bottomless or gathered cylindrical article; and compression-molding the article under heat to form a thermostatic resin foam receptacle.

REFERENCES:
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patent: 3344222 (1967-09-01), Shapiro et al.
patent: 3438824 (1969-04-01), Balamuth
patent: 3439590 (1969-04-01), Rosenberg et al.
patent: 3468226 (1969-09-01), England et al.
patent: 3509252 (1970-04-01), Baehr
patent: 3547012 (1969-02-01), Amberg et al.
patent: 3658615 (1972-04-01), Amberg
patent: 3666162 (1972-05-01), Tiffin et al.
patent: 3767496 (1973-10-01), Amberg et al.
patent: 3820684 (1974-06-01), Harrison

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