Manufacture of draw-redraw cans using film laminated or extrusio

Details Manufacture of draw-redraw cans using film laminated or extrusio Manufacture of draw-redraw cans using film laminated or extrusio

1981-04-02

1984-05-29

Gilden, Leon

Receptacles

Receptacle having flexible, removable inner liner

Means for venting air trapped between the liner and its...

220456, 72 46, B65D 9004

Patent

active

044509774

ABSTRACT:
The use of organic solvent-based coating compositions in the preparation of coated steel feedstock for use in the manufacture of retortable draw-redraw food and beverage cans is eliminated (A) by using as such can feedstock a laminated or extrusion coated steel sheet comprising a steel sheet material (e.g., such as electrolytic chrome/chrome oxide coated steel) having adhered to both major planar surfaces thereof a multilayered synthetic thermoplastic resin coating comprising (1) an adhesive synthetic thermoplastic resin inner layer (e.g., such as a layer of a normally solid random ethylene/acrylic acid copolymer) bonded directly to the surface of said steel sheet material and (2) an outer layer of a synthetic thermoplastic polymer resin which has a crystalline melting point of at least about 250.degree. F. and which is adhered to said adhesive resin inner layer and (B) by post-baking the coated can body formed in such draw-redraw process at a temperature above the melting point of the highest melting resin component of said thermoplastic resin coating.

REFERENCES:
patent: 2406039 (1946-08-01), Roedel
patent: 3671295 (1972-06-01), Ravve
patent: 3826628 (1974-07-01), Adderall
patent: 4292463 (1981-07-01), Bow

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