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:
Nov. 23, 2021
Filed:
Dec. 10, 2019
Applicant:
Chang Chun Plastics Co., Ltd., Taipei, TW;
Inventors:
Assignee:
Chang Chun Plastics Co., Ltd., Taipei, TW;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 63/183 (2006.01); D01D 5/098 (2006.01); D01F 6/62 (2006.01); D04H 1/435 (2012.01);
U.S. Cl.
CPC ...
C08G 63/183 (2013.01); D01D 5/0985 (2013.01); D01F 6/62 (2013.01); D04H 1/435 (2013.01); C08G 2350/00 (2013.01);
Abstract
A polyester with ultra-high flowability and good stability over time is provided. The polyester can be polybutylene terephthalate (PBT) or another aliphatic polyester, whose intrinsic viscosity (IV) is less than 0.6 dL/g and a carboxylic end group (CEG) content is 15 meq/kg or less, and characterized by having a melt volume rate (MVR) of greater than 400 cm/10 min at 250° C. A resin composition of this polyester is provided, which can be meltblown into microfibers of a uniform diameter and a concentrated diameter distribution, forming a fabric with a uniform small pore size.