Invention Grant
- Patent Title: Process for producing needle-punched nonwoven fabric
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Application No.: US16603937Application Date: 2018-04-10
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Publication No.: US11186931B2Publication Date: 2021-11-30
- Inventor: Kazutoshi Hanaya , Toru Takahashi , Hideaki Kaminokado , Masaya Akao , Yusuke Nagatsuka
- Applicant: UNITIKA LTD.
- Applicant Address: JP Amagasaki
- Assignee: UNITIKA LTD.
- Current Assignee: UNITIKA LTD.
- Current Assignee Address: JP Amagasaki
- Agency: Hamre, Schumann, Mueller & Larson, P.C.
- Priority: JPJP2017-078721 20170412
- International Application: PCT/JP2018/015104 WO 20180410
- International Announcement: WO2018/190342 WO 20181018
- Main IPC: D04H1/485
- 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.
[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.
Public/Granted literature
- US20200063303A1 PROCESS FOR PRODUCING NEEDLE-PUNCHED NONWOVEN FABRIC Public/Granted day:2020-02-27
Information query
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