公开(公告)号：US20200063304A1

公开(公告)日：2020-02-27

申请号：US16466142

申请日：2017-12-12

Applicant: UNITIKA LTD.

Inventor： Kazutoshi HANAYA ,  Toru TAKAHASHI ,  Hideaki KAMINOKADO ,  Masaya AKAO ,  Yusuke NAGATSUKA

IPC: D04H1/46 ,  D04H1/4382 ,  B62D25/20 ,  D01F8/14 ,  B62D29/04

Abstract: Provided is a method for producing a semi-product for automobile equipment, the semi-processed product being moldable in a relatively broad range of heating temperatures and being capable of obtaining a final product with high stiffness. In the method for producing a semi-processed product for automobile equipment, needle punching is performed on a fiber web in which core-sheath composite fibers are accumulated, and the core-sheath composite fibers are three-dimensionally interlaced together. The core portion of the core-sheath composite fibers comprises a copolymer of ethylene glycol and terephthalic acid. The sheath portion of the core-sheath composition fibers comprises a copolymer including ethylene glycol, adipic acid and terephthalic acid. The weight ratio of core portion to sheath portion in the core-sheath composite fibers is 1 to 3:1. The core portion and the sheath portion are disposed concentrically. In the fiber web, the core-sheath composite fibers are bonded together by softening or melting the sheath portion.

公开(公告)号：US20200063303A1

公开(公告)日：2020-02-27

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: D04H1/4382 ,  D04H1/485

Abstract: 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.