PROCESS METHOD FOR MICROWAVE HEAT SEALING OF FLASHSPUN NONWOVEN FABRIC, MICROWAVE HEAT SEALING APPARATUS, AND NONWOVEN FABRIC PREPARATION DEVICE

WIPO Patent Application WO/2023/185669

A1

A process method for microwave heat sealing of a flashspun nonwoven fabric, a microwave heat sealing apparatus, and a nonwoven fabric preparation device. The process method comprises the following steps: S1, collecting a tow (300) and lapping to form a nonwoven fabric precursor (500), and adding, onto the nonwoven fabric precursor (500), a microwave heating liquid (400) for absorbing microwave energy and converting the microwave energy into heat energy; S2, performing microwave heating treatment on the nonwoven fabric precursor (500) obtained in S1, and hot press-forming a nonwoven fabric subjected to microwave heating, wherein the microwave heating liquid (400) is a polar solvent having strong microwave energy absorption capacity. In the preparation of nonwoven fabrics by means of the process method, because an inner layer of an obtained nonwoven fabric does not have a temperature gradient as in a traditional hot press forming process, bonding strength between tow fibers is more uniform and firmer, and finally the delamination peel strength of a finished nonwoven fabric is significantly improved.

JPH0597985

POLYESTER FOR BINDER AND ITS PRODUCTION

LUO ZHANGSHENG (CN)
ZHU HUIFEI (CN)
HE LIJUN (CN)

PCT/CN2023/083629

October 05, 2023

March 24, 2023

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XIAMEN DANGSHENG NEW MAT CO LTD (CN)

D04H1/552; D04H1/4291; D04H1/70

CN114657701A	2022-06-24
CN110528172A	2019-12-03
CN101622124A	2010-01-06
JP2014084548A	2014-05-12
JP2011047062A	2011-03-10
JPH06287852A	1994-10-11
KR20030086401A	2003-11-10

XIAMEN JIAJIAN PATENT AGENCY (GENERAL PARTNERSHIP) (CN)

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