- 专利标题: Methods for producing ultrafine fiber and ultrafine fiber-containing sheet, sheet obtained thereby, and resin composite comprising laminated resins
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申请号: US15313804申请日: 2015-05-19
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公开(公告)号: US10273633B2公开(公告)日: 2019-04-30
- 发明人: Go Banzashi , Shino Iwai , Yuichi Noguchi , Hayato Fushimi
- 申请人: OJI HOLDINGS CORPORATION
- 申请人地址: JP Tokyo
- 专利权人: OJI HOLDINGS CORPORATION
- 当前专利权人: OJI HOLDINGS CORPORATION
- 当前专利权人地址: JP Tokyo
- 代理机构: Birch, Stewart, Kolasch & Birch, LLP
- 优先权: JP2014-107721 20140526; JP2014-107722 20140526; JP2014-235277 20141120
- 国际申请: PCT/JP2015/064319 WO 20150519
- 国际公布: WO2015/182438 WO 20151203
- 主分类号: D21H11/20
- IPC分类号: D21H11/20 ; B32B5/28 ; D21H11/18 ; D21H13/30 ; G02F1/1333 ; G09F9/00 ; G09F9/30 ; H01L51/50 ; H05B33/02 ; B32B5/02 ; B32B37/14 ; D21H11/04 ; D21C9/00
摘要:
An object of the present invention is to provide a method for producing an ultrafine fiber-containing sheet with suppressed yellowing. The present invention provides a method for producing an ultrafine fiber-containing sheet, comprising (a) introducing a substituent having electrostatic and/or steric functionality to a fiber raw material to obtain substituent-introduced fiber; (b) machine-processing the substituent-introduced fiber obtained in the step (a) to obtain substituent-introduced ultrafine fiber; (c) preparing a sheet from the substituent-introduced ultrafine fiber obtained in the step (b); and (d) eliminating at least a portion of introduced substituents from the sheet obtained in the step (c). In a preferred aspect, the substituent having electrostatic and/or steric functionality is a phosphoric acid-derived group, and the method may further comprise, after the step (a) and before the step (c), the step of (e) changing the degree of neutralization of the substituent-introduced fiber or the substituent-introduced ultrafine fiber.