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:
Jun. 12, 2001
Filed:
Oct. 07, 1998
Jing-Wen Tzeng, Brunswick, OH (US);
George Getz, Jr., Parma Heights, OH (US);
Thomas William Weber, Cleveland, OH (US);
UCAR Graph-Tech Inc., Lakewood, OH (US);
Abstract
A release lined pressure sensitive adhesive flexible graphite sheet article is provided having low thermal resistance properties comparable to the flexible graphite material itself when compared to prior art PSA sheet products and wherein the release liner is easily removed with the sheet is to be used without any significant delamination of the flexible graphite. The flexible graphite sheet comprises a flexible graphite substrate, an adhesive primer coating thereon, a pressure sensitive adhesive coating on the adhesive primer coating and a release liner applied to the pressure sensitive adhesive coating. Double sided pressure sensitive adhesive flexible graphite sheets can also be made using the method of the invention. It has been found that the use of an adhesive primer coating on the flexible graphite substrate applied from an emulsion as a coating and dried instead of the prior art adhesive containing polymer layer applied as a solid film, such as Mylar film, provide the above desired thermal resistance properties and also enable the use of less pressure sensitive adhesive on the sheet thereby maintaining the low thermal resistance properties of the flexible graphite. Partial coverage of the pressure sensitive adhesive on the sheet article surface for minimizing the thermal resistance of the sheet is also provided.