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:
Feb. 27, 1990
Filed:
Oct. 17, 1988
Applicant:
Inventors:
David H Dumas, Wilmington, DE (US);
Elliott Echt, Wilmington, DE (US);
Assignee:
Hercules Incorporated, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A61F / ; B01D / ; B32B / ; D21H / ; D21H / ;
U.S. Cl.
CPC ...
428212 ; 128849 ; 162146 ; 162149 ; 162207 ; 206438 ; 206439 ; 2065242 ; 2065246 ; 206811 ; 220449 ; 220453 ; 220D / ; 229-31 ; 229 / ; 428286 ; 428288 ; 428296 ; 428297 ; 428302 ; 4283115 ; 4283155 ; 4283159 ;
Abstract
Disclosed is a liquid-impermeable, gas-permeable nonwoven material comprising a thermally consolidated blend of (1) 5% to 30% of a first polyolefin pulp, (2) 15% to 90% of a second polyolefin pulp having a melting point at least 20.degree. C. higher than the first polyolefin pulp, and (3) 5% to 55% of a staple fiber. Also disclosed is a wet forming method for making such a nonwoven material without the use of surfactants.