Method for T or butt sealing of laminated all-plastic material

Details Method for T or butt sealing of laminated all-plastic material Method for T or butt sealing of laminated all-plastic material

1978-05-10

1980-05-06

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156 84, 156196, 156198, 156216, 156304, 156322, 156497, 156499, 156182, 1563086, 264248, 428192, 428322, B32B 3126, B32B 304, B29C 2702

Patent

active

042016096

ABSTRACT:
A method of joining two sheets of a laminated thermoplastic material in a joint wherein the edge portion of a first sheet is butted against a face of a second sheet in which an edge portion of the first sheet, which consists of a central layer of porous plastic material such as a foamed polystyrene and compact facing layers of a thermoplastic material such as polystyrene or polythene, is heated by hot air which first causes the edge portion of the central layer to soften and retract followed by softening of the edge portions of the facing layers which then turn inwardly and join together thus closing off the central layer. The edge portion is then butted against and joined to a heated-up compact thermoplastic layer of the second sheet.

REFERENCES:
patent: 3367818 (1968-02-01), Voelker
patent: 3438826 (1969-04-01), Van Eikeren et al.
patent: 3509005 (1970-04-01), Hartig
patent: 3816234 (1974-06-01), Winfield

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