Metal-polypropylene-metal laminate and method of making a shaped

Details Metal-polypropylene-metal laminate and method of making a shaped Metal-polypropylene-metal laminate and method of making a shaped

1995-06-30

1998-09-29

Resan, Stevan A.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428214, 428215, 428414, 428416, 428460, 428461, 428332, 428334, B32B 702

Patent

active

058143955

ABSTRACT:
A metal-polypropylene-metal laminate, in which the metal sheets are steel or aluminum is provided which is suitable for cold-forming followed by heat treatment at at least 135.degree. C., e.g. for use in vehicle bodywork. To achieve this, the polypropylene of the core of the laminate has a yield stress at the heat treatment temperature of not less than 2 MPa, and has shape stability such that in a standard shape stability test at the heat treatment temperature it changes shape by not more than 0.5.degree.. A bonding agent between the polypropylene core and the metal sheets is suitably one having a thermosetting component and a polypropylene thermoplastic component.

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