B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
113/28, 190/43,
B32B 15/08 (2006.01) B32B 37/20 (2006.01) B65D 1/28 (2006.01) B65D 65/40 (2006.01)
Patent
CA 1286965
ABSTRACT LAMINATES OF POLYOLEFIN-BASED FILM AND METAL PROCESSES FOR PRODUCING SUCH LAMINATES In a laminated material comprising a polyolefin-based film bonded to a metal sheet, the polyolefin-based film is a multi-layer co-extruded film comprising an inner layer of a bonding resin which is an acid-modified polyolefin resin containing carboxyl or anhydride groups and an outer layer of a polyolefin or polyamide containing 0.15% to 0.5% by weight of a finely divided non-reactive low-opacity synthetic silica having an average particle size on the range 0.5 to 5 microns. Another thermoplastic film, such as a biaxially oriented polyester film, may be simultaneously laminated to the other surface of the metal sheet. The lamination process involves heating the laminated material to effect bonding and then quenching the laminated material rapidly and uniformly from above the melting point of the polyolefin to below its softening point. The laminated material may be used in the formation of can ends and can bodies, which can be double seamed together without fibrillation of the coating.
579944
Cmb Foodcan Plc
Finlayson & Singlehurst
LandOfFree
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