SPUNBONDED NONWOVEN FABRIC AND SEPARATION MEMBRANE CONTAINING SAME

WIPO Patent Application WO/2023/026973

A1

The present invention addresses the problem of providing a spunbonded nonwoven fabric in which bleed-through and membrane separation do not occur during membrane-formation processing and that has dimensional stability and mechanical strength, when said fabric is employed in a support body of a separation membrane, such as a reverse osmosis membrane.　The present invention provides a solution by means of a spunbonded nonwoven fabric containing core-sheath composite fibers that contain a polyester, serving as a core component, and a sheath component consisting of a copolymerized polyester, wherein: the melting point of the sheath component is [(the melting point of the core component)-45]°C to [(the melting point of the core component)-15]°C; a copolymer component of the sheath component is polyethylene glycol having a copolymerized amount of 2 to 15 mass% or/and a metal sulfonate group-containing isophthalic acid component having a copolymerized amount of 2.5 to 7.5 mol% with respect to the amount of all acid components; and the contact angle between a surface of the spunbonded nonwoven fabric and water is 0° to 80°.

MACHIDA KANAKO (JP)
WATARI IPPEI (JP)
MAKINO MASATAKA (JP)
TANAKA YOICHIRO (JP)

PCT/JP2022/031345

March 02, 2023

August 19, 2022

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TORAY INDUSTRIES (JP)

D04H3/147; B01D39/16; B01D69/10; B01D69/12; B01D71/16; B01D71/34; B01D71/48; B01D71/52; B01D71/64; B01D71/68; D01F8/14; D04H3/011; D04H3/16; D06M15/37; D06M15/63

WO2018043322A1

2018-03-08

JP2012130890A	2012-07-12
JP2018138704A	2018-09-06
JP2020172034A	2020-10-22
JP2019151962A	2019-09-12

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