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:
Mar. 22, 2011
Filed:
Apr. 25, 2001
Applicants:
Yasuo Iwasa, Ibaraki, JP;
Shigekazu Oi, Ibaraki, JP;
Inventors:
Yasuo Iwasa, Ibaraki, JP;
Shigekazu Oi, Ibaraki, JP;
Assignee:
Yupo Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 5/22 (2006.01); B41M 5/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
A porous resin film which is obtained from a compound prepared by kneading a composition comprising 30 to 100% by weight of a thermoplastic resin comprising a hydrophilic thermoplastic resin and 0 to 70% by weight of an inorganic and/or an organic powder in an intermeshing twin-screw extruder at a screw shear rate of 300 secor higher and which has a liquid absorbing capacity of 0.5 ml/mor more as measured in accordance with the method specified in Japan TAPPI Standard No. 51-87.