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:
Aug. 12, 1997
Filed:
Jun. 01, 1995
Applicant:
Inventors:
Michael Richard Berry, Cleveland, GB;
David Wall, Dalbeattie, GB;
Assignee:
Imperial Chemical Industries PLC, London, GB;
Primary Examiner:
Int. Cl.
CPC ...
B28B / ;
U.S. Cl.
CPC ...
264131 ; 2641711 ; 26417316 ; 264130 ; 427180 ; 427204 ; 427202 ; 428143 ; 428149 ; 428148 ; 428147 ; 428480 ;
Abstract
A method of producing a composite film by forming a substrate layer of polymeric material having an at least one surface a heat-sealable layer and applying a particulate additive to the exposed surface of the heat-sealable layer with the particulate additive bonding to and/or penetrating into the heat-sealable layer. The exposed surface of the heat-sealable layer has greater than 100 surface protrusions per mm2 produced by the particulate additive. The surface protrusions have an average peak height in the range from 5 to 400 nm measured from the average level of the surface of the heat-sealable layer.