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. 20, 2016
Filed:
Jun. 25, 2008
Tomoaki Takebe, Ichihara, JP;
Yutaka Minami, Ichihara, JP;
Toshitaka Kanai, Ichihara, JP;
IDEMITSU KOSAN CO., LTD., Tokyo, JP;
Abstract
(1) An elastic nonwoven fabric and a fiber product using the elastic nonwoven fabric, the elastic nonwoven fabric containing a crystalline resin composition containing low crystalline polypropylene and high crystalline polypropylene, the low crystalline polypropylene satisfying items (a) and (b) below, and a crystallization temperature (Tc) of the crystalline resin composition measured with a differential scanning calorimeter (DSC) being from 20 to 100° C.: (a) a melting point (Tm-D) being from 0 to 120° C., which is defined as a peak top of a peak observed on the most high temperature side of a melt endothermic curve obtained by maintaining at −10° C. for 5 minutes and increasing in temperature at 10° C. per minute in a nitrogen atmosphere with a differential scanning calorimeter (DSC); and (b) a stereoregularity index ([mm]) being from 50 to 90% by mol; (2) an elastic nonwoven fabric and a fiber product using the elastic nonwoven fabric, the elastic nonwoven fabric being produced by using a crystalline resin composition containing low crystalline polypropylene satisfying items (c) to (h) below, and a releasing agent: (c) [mmmm]=20 to 60% by mol; (d) [rrrr]/(1−[mmmm])≦0.1; (e) [rmrm]>2.5% by mol; (f) [mm]×[rr]/[mr]≦2.0; (g) mass average molecular weight (Mw)=10,000 to 200,000; and (h) molecular weight distribution (Mw/Mn)<4; and (3) an elastic nonwoven fabric and a fiber product using the elastic nonwoven fabric, the elastic nonwoven fabric containing core/shell type composite fibers containing low crystalline polypropylene satisfying the items (c) to (h) have excellent elastic recovery property and pleasant texture without stickiness.