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. 17, 1998
Filed:
Feb. 07, 1996
Shigemitsu Murase, Kyoto, JP;
Eiichi Kubo, Kyoto, JP;
Koichi Nagaoka, Kyoto, JP;
Yoshiki Miyahara, Kyoto, JP;
Unitika, Ltd., Amagasaki, JP;
Abstract
The present invention provides a nonwoven fabric made of fine denier filaments of superior bulkiness, heat insulation property and tensile strength, and a production method thereof. This nonwoven fabric is made of fine denier filaments produced by first preparing. First a thermoplastic polymer component 'A', then another thermoplastic polymer component 'B' which is insoluble in the component 'A' and of which the melting point is higher than that of the component 'A' by 30.degree. to 180.degree. C. Adopting a bicomponent melt spinning method employing the component 'A' and the component 'B', the bicomponent conjugate filaments, on which surface at least component 'A' is exposed, are obtained. By accumulating these bicomponent conjugate filaments, a web is formed. Then heat is applied to the predetermined areas on the web throughout its entire thickness, whereby only the component A is softened or molten, and the bicomponent conjugate filaments are heat bonded to one another, thus a fleece is obtained. The predetermined areas are shaped like dots or lattices and distributed with a certain space between them. After obtaining the fleece, a wrinkling action is applied to the fleece.