发明授权
- 专利标题: Process for the manufacture of solid regenerated viscose fibers
- 专利标题(中): 固体再生粘胶纤维的制造方法
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申请号: US13017280申请日: 2011-01-31
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公开(公告)号: US08287785B2公开(公告)日: 2012-10-16
- 发明人: Josef Schmidtbauer , Heinrich Schmidt , Susanna Schiemer
- 申请人: Josef Schmidtbauer , Heinrich Schmidt , Susanna Schiemer
- 申请人地址: AT Lenzing
- 专利权人: Lenzing Aktiengesellschaft
- 当前专利权人: Lenzing Aktiengesellschaft
- 当前专利权人地址: AT Lenzing
- 代理机构: Baker Botts L.L.P.
- 优先权: AT1035/2002 20020709
- 主分类号: D01D5/06
- IPC分类号: D01D5/06 ; D01D5/12 ; D01D5/253 ; D01D5/26 ; D01F2/08 ; D02J1/22
摘要:
The present invention concerns a process for the manufacture of solid regenerated viscose fibers, comprising the steps of: —spinning a viscose spinning dope through a spinneret comprising spinning holes into a regenerating bath thereby forming filaments, —said viscose spinning dope having an alkali ratio immediately before spinning of from 0.7 to 1.0, preferably from 0.8 to 0.9, —at least part of said spinning holes having a circular orifice, —said regenerating bath containing—from 70 to 120 g/l, preferably 90 to 110 g/l sulfuric acid, —from 240 to 380 g/l, preferably 330 to 370 g/l sodium sulphate, —from 20 to 50 g/l, preferably 25 to 35 g/l zinc sulphate and said regenerating bath having a temperature of from 45 to 55° C., preferably 48 to 50° C., —stretching said filaments after leaving said regenerating bath in a secondary bath and/or in air at a stretching ratio of from 70% to 90%, preferably 80% to 90% of the maximum stretching ratio as hereinbefore defined and —treating said filaments with a fatty acid ester.
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