POLYPHENYLENE SULFIDE FIBER, PROCESS FOR PRODUCING THE SAME, WET-LAID NONWOVEN FABRIC, AND PROCESS FOR PRODUCING WET-LAID NONWOVEN FABRIC

Title:

POLYPHENYLENE SULFIDE FIBER, PROCESS FOR PRODUCING THE SAME, WET-LAID NONWOVEN FABRIC, AND PROCESS FOR PRODUCING WET-LAID NONWOVEN FABRIC

Document Type and Number:

WIPO Patent Application WO/2010/007919

Kind Code:

A1

Abstract:

Polyphenylene sulfide fibers which are amorphous, have a low degree of thermal shrinkage, and are suitable for use as a binder for papermaking, etc.; a process for producing the fibers; a wet-laid nonwoven fabric comprising the polyphenylene sulfide fibers; and a process for producing a highly insulating wet-laid nonwoven fabric. The polyphenylene sulfide fibers are characterized by having a quantity of heat of crystallization as determined by DSC of 10 J/g or larger and a degree of shrinkage through 30-minute dry heating at 150 °C of 20% or lower. The process for producing a densified wet-laid nonwoven fabric is characterized in that a wet-laid nonwoven fabric comprising 60-100 mass% polyphenylene sulfide fibers having a quantity of heat of crystallization of 10 J/g or larger, is pressed with heating at a temperature not lower than the glass transition temperature of the amorphous polyphenylene sulfide and not higher than the melting point thereof, the polyphenylene sulfide fibers which have not undergone the pressing with heating having a quantity of heat of crystallization of 5 J/g or larger.

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Inventors:

TAKANO, Tomoko (Toray Industries Inc., 1-1, Oe 1-chome, Otsu-sh, Shiga 41, 〒5202141, JP)
高野　朋子 (〒41 滋賀県大津市大江１丁目１番１号　東レ株式会社　瀬田工場内 Shiga, 〒5202141, JP)
SUGANO, Koji (Toray Industries Inc., 1-1, Oe 1-chome, Otsu-sh, Shiga 41, 〒5202141, JP)
菅埜　幸治 (〒41 滋賀県大津市大江１丁目１番１号　東レ株式会社　瀬田工場内 Shiga, 〒5202141, JP)

Application Number:

JP2009/062406

Publication Date:

January 21, 2010

Filing Date:

July 08, 2009

Export Citation:

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Assignee:

TORAY INDUSTRIES, INC. (1-1 Nihonbashi-Muromachi 2-chome, Chuo-ku Tokyo, 66, 〒1038666, JP)
東レ株式会社 (〒66 東京都中央区日本橋室町２丁目１番１号 Tokyo, 〒1038666, JP)
TAKANO, Tomoko (Toray Industries Inc., 1-1, Oe 1-chome, Otsu-sh, Shiga 41, 〒5202141, JP)
高野　朋子 (〒41 滋賀県大津市大江１丁目１番１号　東レ株式会社　瀬田工場内 Shiga, 〒5202141, JP)
SUGANO, Koji (Toray Industries Inc., 1-1, Oe 1-chome, Otsu-sh, Shiga 41, 〒5202141, JP)

International Classes:

D01F6/76; D04H1/50; D04H1/558; D21H13/20; D21H27/12

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