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. 04, 1976
Filed:
Apr. 29, 1974
Applicant:
Inventors:
Akira Omori, Sagamihara, JA;
Isao Okamura, Sagamihara, JA;
Tadasi Imoto, Sagamihara, JA;
Tadayuki Katoh, Tokyo, JA;
Assignee:
Teijin Ltd., Osaka, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264 51 ; 2642 / ; 264D / ; 264D / ; 428105 ;
Abstract
A process for the preparation of unopened sheet-formed and reticulated fibrous structures, which comprises: A. extruding a molten thermoplastic resin containing a foaming substance through a die with a slit clearance of 0.1 - 1.0mm; B. quenching the extrudate at a point less than 5mm away from the die surface to a temperature below the glass transition temperature of the resin; and C. simultaneously drafting the extrudate at a draft ratio between the maximum draft ratio possible under the conditions and one-third thereof, thereby fibrillating the extrudate just as it leaves the die exit.