Manufacture of laminates of sheet metal, polythene and aluminium

Details Manufacture of laminates of sheet metal, polythene and aluminium Manufacture of laminates of sheet metal, polythene and aluminium

1974-10-10

1976-07-20

Drummond, Douglas J.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156191, 156309, 156311, 156499, B31C 1300

Patent

active

039704963

ABSTRACT:
A metallic laminate of the type comprising sheet metal, such as galvanized sheet steel, and aluminium foil, with an interposed thermoplastic, such as polyethylene, which, under heat and pressure, adheres to the foil and sheet metal, has its bond strength substantially increased winding it as a coil under tension, the laminate being heated, before and/or after coiling. Subsequently the coil, while clamped radially to prevent relative movement of the coil convolutions, is cooled from the outside, the coiling under tension, the heating and the cooling all causing inter-layer pressures in the coil which, with the heat, bring about a useful increase in the bond strength.

REFERENCES:
patent: 3647617 (1972-03-01), Rieke et al.
patent: 3712849 (1973-01-01), Robbiati
patent: 3721597 (1973-03-01), Colburn
patent: 3725169 (1973-04-01), Allen et al.
patent: 3767500 (1973-10-01), Tally et al.

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