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. 25, 2012
Filed:
Mar. 29, 2005
Markus Schneider, Dusseldorf, DE;
Bernd Wohlmann, Dusseldorf, DE;
Markus Schneider, Dusseldorf, DE;
Bernd Wohlmann, Dusseldorf, DE;
Toho Tenax Europe GmbH, Wuppertal, DE;
Abstract
A yarn includes reinforcing fiber filaments and a resin that is infiltrated into the yarn and can be repeatedly melted and solidified by cooling to room temperature, wherein the filaments of the yarn are at least partially bound to one another by the resin, wherein the yarn contains 2.5 to 25 wt.% of infiltrated resin relative to its total weight, and wherein the infiltrated resin includes a mixture of at least two epoxy resins Eand E, Ehaving an epoxy value in the range of 2,000 to 2,300 mmol/kg of resin and Ehaving an epoxy value in the range of 500 to 650 mmol/kg of resin, and the weight ratio E:Eof the epoxy resins Eand Ein the mixture is chosen so that the infiltrated resin mixture has an epoxy value between 550 and 2,100 mmol/kg of resin. A preform comprising the yarn, a method for producing the preform and its use in producing a composite are also described.