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. 05, 1978
Filed:
Oct. 29, 1974
Applicant:
Inventor:
James Jack, Mistley, GB;
Assignee:
Bakelite Xylonite Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ; C08J / ;
U.S. Cl.
CPC ...
521 84 ; 264 41 ; 264 453 ; 2642 / ; 264288 ; 264D / ; 521 97 ; 521 90 ; 521 93 ; 521 88 ; 521134 ; 521136 ; 521138 ; 521143 ; 521144 ; 521146 ;
Abstract
A process for the manufacture of a multicellular stretched sheet which comprises melt compounding a thermoplastic matrix polymer and an additive comprising a polymeric or non-polymeric organic compound or a metal salt of an organic acid, forming the blend into a shaped article and stretching the article at a temperature within the normal orientation temperature of the matrix polymer and below the glass-transition temperature of the polymeric additive or below the melting or softening point of the non-polymeric additive.