公开(公告)号：US11186931B2

公开(公告)日：2021-11-30

申请号：US16603937

申请日：2018-04-10

Applicant: UNITIKA LTD.

Inventor： Kazutoshi Hanaya ,  Toru Takahashi ,  Hideaki Kaminokado ,  Masaya Akao ,  Yusuke Nagatsuka

IPC: D04H1/485 ,  D04H1/4382 ,  D04H1/541 ,  A47L13/16 ,  D04H1/435 ,  D04H1/559

Abstract: [Problem] To provide a process for producing a needle-punched nonwoven fabric with which, when finished by embossing, it is possible to obtain a hardly fluffing and distinct rugged pattern.
[Solution] Sheath-core composite fibers are accumulated and a fibrous web is formed. The core component of the sheath-core composite fiber is formed from a copolymer of ethylene glycol and terephthalic acid. The sheath component is formed from a copolymer of ethylene glycol, adipic acid, terephthalic acid, isophthalic acid and diethylene glycol. The sheath-core composite fibers are three dimensionally interlaced with each other by needle-punching the web, to obtain the needle-punched nonwoven fabric. The needle-punched nonwoven fabric is passed through heated embossed roll to provide a rugged pattern on a surface. During the process, the sheath component are softening melted and melt bonded between the sheath-core composite fibers to obtain an embossed nonwoven fabric having a distinct rugged pattern.