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:
Apr. 24, 1990
Filed:
Feb. 16, 1988
Applicant:
Inventors:
Robert A Tyler, Candler, NC (US);
Henry C Ramsey, Asheville, NC (US);
Robert N Armstrong, Asheville, NC (US);
Assignee:
BASF Corporation, Williamsburg, VA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D06M / ; B32B / ;
U.S. Cl.
CPC ...
81161 ; 811554 ; 604375 ; 428533 ;
Abstract
A method of increasing the absorbency of cellulosic fibers by treating the cellulosic fibers with an aqueous acid solution having a pH value of no more than 4. The treatment is carried out for a time sufficient to obtain the desired absorbency. Optionally, the aqueous acidic solution treatment can be preceded or succeeded by a hot water treatment to further increase the absorbency of the cellulosic fibers. The cellulosic fibers find particular application in nonwoven articles that require high absorbency, i.e., diapers, tampons, medical sponges, etc.