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. 30, 1986
Filed:
Dec. 10, 1985
Peter Wolki, Monchen-Gladbach, DE;
Norton Pampus GmbH, Willich, DE;
Abstract
The present invention relates to a method of producing a polytetrafluorethylene material comprising filler particles embedded therein. In fact, the mechanical characteristics of most synthetic materials can be improved by the inclusion of filler particles. Nevertheless, tests performed to embed filler particles in PTFE have unexpectedly resulted in the reduction of essential mechanical characteristics (tensile strength, rupture elongation) due to this inclusion. According to the invention, this disadvantage is prevented by a method according to which the filler particles are coated with an in melted condition relatively low viscous and/or polar perfluoralkoxy copolymer (PFA), tetrafluorethylene-perfluorpropylene copolymer (FEP) or mixtures thereof serving as adhesive agent before mixing them with polytetrafluorethylene. This permits to obtain substantial improvement of the mechanical properties.