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:
Jun. 09, 1992
Filed:
Jun. 25, 1991
Ronald S Nohr, Roswell, GA (US);
J Gavin MacDonald, Decatur, GA (US);
Kimberly-Clark Corporation, Neenah, WI (US);
Abstract
A surface-segregatable, melt-extrudable thermoplastic composition suitable for processing by melt extrusion to form a fiber or film having a differential, increasing concentration of an additive from the center of the fiber or film to the surface thereof, which differential, increasing concentration imparts to the surface of the fiber or film at least one desired characteristic which otherwise would not be present, which composition includes at least one thermoplastic polymer and at least one defined additive. During formation of the fiber or film, the additive rapidly segregates in a controllable manner toward the newly-formed surface of the fiber or film, thereby resulting in a controllable differential concentration of the polymeric material, which concentration increases with increasing distance from the center of the fiber or film to its surface. The weight ratio of the polymer to the additive is in the range of from about 1 to about 1,000. The preferred polymer is a polyolefin such as polyethylene and polypropylene. The thermoplastic composition is useful in the preparation of fibers or films which have at least one surface characteristic which is different from that of the polymer component of the thermoplastic composition. The thermoplastic composition is particularly useful in the formation of nonwoven webs which are used in the construction of such disposable absorbent products as diapers, feminine care products, incontinence products, and the like.