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:
Jan. 06, 1981
Filed:
Oct. 25, 1977
Applicant:
Inventor:
Duggan J Gash, Lower Froyle, near Bentley, GB;
Assignee:
Koninklijke Emballage Industrie Van Leer B.V., Amstelveen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; B32B / ;
U.S. Cl.
CPC ...
156324 ; 264346 ; 428910 ;
Abstract
A method for improving the impact strength and other properties of monaxially oriented, thermoplastic polymeric film cross-laminates which comprises first forming the cross-laminate and then annealing it at an elevated temperature. The annealing may be carried out by passing the cross-laminate through an annealing oven or over a heated cylinder. Annealing temperatures can vary from 35.degree. C. to a temperature below the melting temperature of the lowest melting thermoplastic film, excluding any adhesive or extruded bonding layer. A particularly useful annealing temperature is within the range of 60.degree. to 180.degree. C.