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:
Dec. 08, 1981
Filed:
Mar. 31, 1980
Ludwig Hartmann, Kaiserslautern, DE;
Carl Freudenberg, , DE;
Abstract
Spun, non-woven fabrics from bonded polyolefin filaments deposited in a random fashion and comprising individual filaments and filament groups of at least two parallelized individual filaments, and at least a portion of the individual filaments and filament groups are modified by polar groups in ethylene oxide and/or propylene oxide adducts, added in the nature of fibrillae on the filament or filament group surfaces or by surface treatment thereof with ethylene oxide adducts of propylene oxide block polymers with at least 20% by weight of ethylene oxide; and processes for the production of such spun, non-woven fabrics wherein the polyolefin filaments are extruded from a multiplicity of spinnerets, which are then deposited in random fashion as a mixed fleece of individual and groups of parallelized filaments and wherein, during or after extrusion, adducts of the propylene oxide and/or of the ethylene oxide are added to the filaments and/or filament groups, after which the mixed fleece thus produced is bonded by autogenous bonding.