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:
Dec. 18, 1990
Filed:
Aug. 03, 1989
Applicant:
Inventor:
Peter Y Kelly, Kingston, CA;
Assignee:
Du Pont Canada Inc., Mississauga, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H05F / ; B29C / ;
U.S. Cl.
CPC ...
204165 ; 204168 ; 204169 ; 428391 ; 428447 ; 264 22 ; 26421124 ;
Abstract
Polyolefin coatings and films having release characteristics, also known as release sheets, are disclosed. The release sheets are formed by treating a sheet formed from polyolefin and dimethyl polysiloxane having functional end groups with a corona discharge. In a preferred embodiment, the release sheet is formed from polyolefin, the dimethyl polysiloxane, vinyl silane, an agent to graft the vinyl silane onto the polyolefin and a moisture curing agent by extrusion in the form of sheet, treating the sheet with a corona discharge and then subjecting the sheet to moisture. The release sheets may be used, for instance, as the backing sheet for labels.