Method for producing receptacles from thermoplastic resin...

Details Method for producing receptacles from thermoplastic resin... Method for producing receptacles from thermoplastic resin...

B - Operations, Transporting

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B29D 22/00 (2006.01) B29C 43/02 (2006.01) B29C 53/44 (2006.01) B29C 57/10 (2006.01) B29C 61/02 (2006.01) B29C 69/00 (2006.01) B29C 61/00 (2006.01)

Patent

CA 1041261

ABSTRACT OF THE DISCLOSURE 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 cylin- drical article; and compression-molding the article under heat to form a thermoplastic-resin foam receptacle.

187047

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