The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 1998
Filed:
Jun. 30, 1995
Maria E Soellaart-Roelofsen, Oostzaan, NL;
Jan Bottema, Santpoort-Zuid, NL;
Hoogovens Hylite BV, Ijmuiden, NL;
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.