Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1992-08-12
1994-11-15
Withers, James D.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
156166, 156167, 264171, 26417717, 264DIG26, 428296, 428373, 428903, D04H 158, D04H 316, B29C 4700
Patent
active
053646940
ABSTRACT:
Provided is a polyethylene terephthalate-based meltblown nonwoven fabric comprising a mixed polymer comprising 75 to 98% by weight of polyethylene terephthalate and 2 to 25% by weight of a polyolefin. The meltblown fabric has excellent thermal resistance, dimensional stability, strength and hand. Also provided is a process for producing a polyethylene terephthalate-based meltblown nonwoven fabric, which comprises melt blowing a mixed polymer comprising 75 to 98% by weight of polyethylene terephthalate and 2 to 25% by weight of a polyolefin. It is preferable that the melt blowing is conducted at a single orifice throughput of 0.2 to 1.0 g/min and under an air-jet pressure of 0.1 to 1.0 kg/cm.sup.2.
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English Translation of JP-3-045768 (Okumura et al.).
WPIL, Derwent Publications, Ltd., AN 91-105014 c 15!, & JP-A 3 045 768, Feb. 27, 1991, "Melt-Blown Non-Woven Fabric Of Polyethylene Terephthalate-With Specified Crystallinity And Thermal Shrinkage, And Is Used For Clothes, Filter Cloth For Gas Or Liquid, ETC.".
Central Patents Index, Basic Abstracts Journal, Derwent Publications, Ltd., AN 77-89360Y c 50!, & JP-A-52 132 192, Nov. 5, 1977, "Polyolefin Removal From Conjugate Fibre Of Polyolefin And Polyester-By Treatment With AQ. System Without Using Organic Solvent".
WPIL, Derwent Publications, Ltd., AN 86-260363 c 40!, & JP-A-61 186 576, Aug. 20, 1986, "Synthetic Leather Sheet-Consisting Of Very Fine Sheath-Core Fibre Molten Or Fused With Elastic Polymer".
Patent Abstracts Of Japan, vol. 012, No. 301, (C-521), Aug. 16, 1988, & JP-A-63 075 108, Apr. 5, 1988, K. Kogame, et al., "Multicomponent Fiber".
Asano Shoji
Okada Hiromasa
Kuraray Co. Ltd.
Withers James D.
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