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1. 发明授权

US5264173A Polyvinyl alcohol monofilament yarns and process for producing the same 失效
标题翻译：聚乙烯醇单丝纱及其制造方法
公开(公告)号：US5264173A
公开(公告)日：1993-11-23
申请号：US748722
申请日：1991-08-22
申请人： Masatsugu Mochizuki , Kazutaka Kooda , Siro Murakami , Naohiko Nagata , Mitsuo Kawaguchi
发明人： Masatsugu Mochizuki , Kazutaka Kooda , Siro Murakami , Naohiko Nagata , Mitsuo Kawaguchi
IPC分类号： D01F6/14
CPC分类号： D01F6/14
摘要： A process for producing a high strength and high initial modulus polyvinyl alcohol monofilament yarn. The monofilament yarn is polyvinyl alcohol having a polymerization degree of from 1500 to 7000, a tensile strength of not less than 10 g/d and an initial modulus of not less than 200 g/d, with a fineness of 100 denier or more. The monofilament yarn is made by dry-wet spinning a spinning dope prepared by dissolving polyvinyl alcohol having a polymerization degree of from 1500 to 7000 in a solvent and stretching the resulting unstretched filament, where a plurality of filaments immediately after being spun from a spinning nozzle having a plurality of orifices are closely adhered and united into a substantially single strand in an inert atmosphere and then introduced into a coagulating bath or a cooling bath.
摘要翻译：一种制造高强度和高初始模量聚乙烯醇单丝纱的方法。单丝是聚合度为1500〜7000，拉伸强度为10g / d以上且初始模量为200g / d以上的聚乙烯醇，细度为100旦尼尔以上。单丝纱是通过将通过将聚合度为1500〜7000的聚乙烯醇溶解在溶剂中而制备的纺丝原液干燥纺丝而制成的，并拉伸所得到的未拉伸长丝，其中在从纺丝喷嘴纺出后立即将多根细丝具有多个孔在惰性气氛中紧密粘合并结合成基本单股，然后导入凝固浴或冷却浴。

2. 发明授权

US5091254A Polyvinyl alcohol monofilament yarns and process for producing the same 失效
标题翻译：聚乙烯醇单体纱及其制造方法
公开(公告)号：US5091254A
公开(公告)日：1992-02-25
申请号：US527976
申请日：1990-05-24
申请人： Masatsugu Mochizuki , Kazutaka Kooda , Siro Murakami , Naohiko Nagata , Mitsuo Kawaguchi
发明人： Masatsugu Mochizuki , Kazutaka Kooda , Siro Murakami , Naohiko Nagata , Mitsuo Kawaguchi
IPC分类号： D01D5/06 , D01F6/14
CPC分类号： D01F6/14 , Y10T428/2913 , Y10T428/2929
摘要： A high strength and high initial modulus polyvinyl alcohol monofilament yarn and a process for producing the same with high productivity are disclosed, the monofilament yarn comprising polyvinyl alcohol having a polymerization degree of from 1500 to 7000, having a tensile strength of not less than 10 g/d and an initial modulus of not less than 200 g/d, and having a fineness of 100 denier or more; and the process comprising dry-wet spinning a spinning dope prepared by dissolving polyvinyl alcohol having a polymerization degree of from 1500 to 7000 in a solvent and stretching the resulting unstretched filament, wherein a plurality of filaments immediately after being spun from a spinning nozzle having a plurality of orifices are closely adhered and united into a substantially single strand in an inert atmosphere and then introduced into a coagulating bath or a cooling bath.

3. 发明授权

US5093063A Method of producing polyvinyl alcohol fibers 失效
标题翻译：生产聚乙烯醇纤维的方法
公开(公告)号：US5093063A
公开(公告)日：1992-03-03
申请号：US446732
申请日：1989-12-06
申请人： Masaharu Watanabe , Kenichi Tanimoto , Kazutaka Kooda , Naohiko Nagata , Keiichi Wakayama , Tsunetoshi Matsuda
发明人： Masaharu Watanabe , Kenichi Tanimoto , Kazutaka Kooda , Naohiko Nagata , Keiichi Wakayama , Tsunetoshi Matsuda
IPC分类号： D01D5/06 , D01F6/14
CPC分类号： D01D5/06 , D01F6/14 , Y10T428/2913
摘要： A high tenacity, high initial modulus polyvinyl alcohol fiber is produced by:(1) dissolving polyvinyl alcohol with a degree of polymerization of not less than 1,500 in a solvent capable of giving a 5 wt % polyvinyl alcohol solution and the solvent is further characterized in that the nuclear magnetic resonance spectrum measured at 50.degree. C. after storage of the solution at 50.degree. C. for 96 hours following preparation thereof is substantially identical with that measured at 50.degree. C. immediately after preparation thereof, with peaks for the three kinds of hydroxyl groups of polyvinyl alcohol being clearly distinguishable in each nuclear magnetic resonance spectrum,(ii) forming filaments by spinning the spinning solution under conditions which satisfy the requirementsDs.ltoreq.5.0 wherein Ds is the spinning stretch ratio defined as the ratio (V.sub.2 /V.sub.1) of the take off speed (V.sub.2) to the first take off roller speed (V.sub.1),(iii) subjecting the filaments thus-formed to multistage stretching in at least two stages either continuously with step (ii) or after temporarily winding up the filaments, wherein at least one stretching stage in the multistage stretching is conducted at a temperature of not lower than 200.degree. C. until the total stretch ratio amounts to not less than 15.

4. 发明授权

US4971861A Polyvinyl alcohol fiber and method of manufacture thereof 失效
标题翻译：聚乙烯醇纤维及其制造方法
公开(公告)号：US4971861A
公开(公告)日：1990-11-20
申请号：US138109
申请日：1987-12-28
申请人： Masaharu Watanabe , Kenichi Tanimoto , Kazutaka Kooda , Naohiko Nagata , Keiichi Wakayama , Tsunetoshi Matsuda
发明人： Masaharu Watanabe , Kenichi Tanimoto , Kazutaka Kooda , Naohiko Nagata , Keiichi Wakayama , Tsunetoshi Matsuda
IPC分类号： D01D5/06 , D01F6/14
CPC分类号： D01D5/06 , D01F6/14 , Y10T428/2913
摘要： A high tenacity, high intitial modulus polyvinyl alcohol fiber showing a high level of crystalline heat of fusion, characterized in that the fiber is made of polyvinyl alcohol having a degree of polymerization of not less than 1,500, has a tenacity of not less than 17 g/d and an initial modulus of elasticity of not less than 400 g/d and shows a crystalline heat of fusion of not less than 29 cal/g, and a method of producing said polyvinyl alcohol fiber comprising:(i) dissolving polyvinyl alcohol with a degree of polymerization of not less than 1,500 in a solvent capable of giving a 5 wt % polyvinyl alcohol solution and the solvent is further characterized in that the nuclear magnetic resonance spectrum measured at 50.degree. C. after storage of the solution at 50.degree. C. for 96 hours following preparation thereof is substantially identical with that measured at 50.degree. C. immediately after preparation thereof, with peaks for the three kinds of hydroxyl groups of polyvinyl alcohol being clearly distinguishable in each nuclear magnetic resonance spectrum,(ii) forming unstretched filaments by spinning the spinning solution under conditions which satisfy the requirementDs.ltoreq.5.0 wherein Ds is the spinning stretch ratio defined as the ratio (V.sub.2 V.sub.1) of the take off speed (V.sub.2) to the first take off roller speed (V.sub.1),(iii) subjecting the unstretched filaments thus-formed to multistage stretching in at least two stages either continuously with step (ii) or after temporarily winding up the frilaments, wherein at least one stretching stage in the multistage stretching is conducted at a temperature of not lower than 200.degree. C. until the total stretch ratio amounts to not less than 15.

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