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:
Jul. 25, 2023
Filed:
Mar. 02, 2018
Applicant:
Alpha Werke Alwin Lehner Gmbh & Co. KG, Hard, AT;
Inventors:
Robert Siegl, Dornbirn, AT;
Andreas Weber, Thuringen, AT;
Assignee:
ALPLA WERKE ALWIN LEHNER GMBH & CO. KG, Hard, AT;
Primary Examiner:
Int. Cl.
CPC ...
C08J 9/16 (2006.01); C08J 9/06 (2006.01);
U.S. Cl.
CPC ...
C08J 9/16 (2013.01); C08J 9/06 (2013.01); C08J 2201/024 (2013.01); C08J 2201/026 (2013.01); C08J 2201/03 (2013.01); C08J 2203/02 (2013.01); C08J 2203/10 (2013.01); C08J 2207/00 (2013.01); C08J 2300/12 (2013.01); C08J 2300/30 (2013.01); C08J 2367/02 (2013.01); C08J 2367/04 (2013.01);
Abstract
The invention relates to a method in which a polyester melt containing one or more polyesters is produced, the polyester melt being foamed by a blowing agent and a foamed granulate is produced from the foamed polyester melt. The intrinsic viscosity (IV) of the polyester melt is reduced by the blowing agent about at least 0.05 dl/g, measured according to ASTM D4603, and the IV of the foamed granulate is then increased by means of a solid phase polycondensation (SSP).