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:
May. 15, 2012
Filed:
Jun. 15, 2005
Yoshiaki Yasuda, Kurashiki, JP;
Jiro Tanaka, Kurashiki, JP;
Yoshiyuki Ando, Kurashiki, JP;
Yoshiki Nobuto, Kurashiki, JP;
Kimio Nakayama, Kurashiki, JP;
Yoshihiro Tanba, Kurashiki, JP;
Tsuyoshi Yamasaki, Kurashiki, JP;
Yoshiaki Yasuda, Kurashiki, JP;
Jiro Tanaka, Kurashiki, JP;
Yoshiyuki Ando, Kurashiki, JP;
Yoshiki Nobuto, Kurashiki, JP;
Kimio Nakayama, Kurashiki, JP;
Yoshihiro Tanba, Kurashiki, JP;
Tsuyoshi Yamasaki, Kurashiki, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
A method of producing an entangled sheet of microfine long fibers using long fibers for forming microfine fibers. The method includes a step of forming a long-fiber web made of long fibers for forming microfine fibers, at least one component of the long fibers being a water-soluble, thermoplastic polyvinyl alcohol resin; a step of entangling the long-fiber web to form a long-fiber entangled sheet; a step of shrinking the long-fiber entangled sheet to form a long-fiber shrunk sheet; and a step of converting the long fibers for forming microfine fibers in the long-fiber shrunk sheet to microfine long fibers, thereby producing the entangled sheet of microfine long fibers. The step of entangling is conducted so as to allow the long-fiber entangled sheet to have an interlaminar peel strength of 2 kg/2.5 cm or more. The step of shrinking is conducted so as to shrink in an areal shrinkage of 35% or more.