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1. 发明专利

AU715169B2 Easily fibrillable fiber 未知
公开(公告)号：AU715169B2
公开(公告)日：2000-01-20
申请号：AU3744697
申请日：1996-05-20
申请人： KURARAY CO , MATSUSHITA ELECTRIC IND CO LTD
发明人： OHMORY AKIO , YOSHIMOCHI HAYAMI , SATOH MASAHIRO , SANO TOMOYUKI , KOBAYASHI SATORU , NARAMURA SYUNPEI
IPC分类号： D01F6/14 , D01D5/36 , D01F8/02 , D01F8/10 , D04H13/02
摘要： PCT No. PCT/JP96/01322 Sec. 371 Date Jan. 20, 1998 Sec. 102(e) Date Jan. 20, 1998 PCT Filed May 20, 1996 PCT Pub. No. WO97/44511 PCT Pub. Date Nov. 27, 1997A fiber of sea-islands phase separation wherein the sea component comprises a vinyl alcohol based polymer with high orientation and great crystallinity and the islands component comprises a water-insoluble cellulose based polymer with excellent absorptivity of alkaline solutions, thermal resistance and heat fusion resistance, and wherein the size of the islands is 0.03 to 10 mu m and the strength is 3 g/d or more, is readily disintegrated into a fibril of a diameter of 0.05 to 8 mu m when a mechanical stress is imposed onto the fiber wet in water. From the fibril with good hydrophilicity, high strength, great particle captivity and excellent reinforcing performance, and additionally with good absorptivity of alkaline solutions and great thermal resistance and heat fusion resistance, none of the fiber components therein is solubilized during fibrillation. Neither a beating process nor a beating solution causes foaming or environmental pollution. The fibril is extremely useful for use in separator sheets for alkaline batteries, reinforcing fibers of cement slate plates, reinforcing fibers of frictional materials and the like.

2. 发明专利

AT174389T 未知
公开(公告)号：AT174389T
公开(公告)日：1998-12-15
申请号：AT94116014
申请日：1994-10-11
申请人： KURARAY CO
发明人： OHMORY AKIO , SANO TOMOYUKI , SATOH MASAHIRO , NARAMURA SYUNPEI , KOBAYASHI SATORU , SEKIYA YOSUKE
IPC分类号： D01F8/10 , D04H1/54
摘要： By mixing a high-melting polyvinyl alcohol type polymer (A) and a low-melting water-soluble polymer (B) in a solvent for the polymer (A) to prepare a spinning solution and then subjecting the solution to low-temperature spinning so that the resulting filaments are solidified uniformly in the cross-sectional direction, there is formed a fiber of sea-islands structure comprising said high-melting polyvinyl alcohol type polymer (A) as the sea component and said low-melting water-soluble polymer (B) as the islands component. In this fiber, at least part of the islands component is present in a fiber zone ranging from the fiber surface to 2 mu m inside and the fiber surface contains substantially no islands component. This fiber ordinarily shows the performance of the matrix phase, i.e. the performance of a high-melting polyvinyl alcohol fiber; however, when the fiber is pressurized at high temperatures, the low-melting polymer (the islands component) is pushed out onto the fiber surface and there occurs heat bonding between fibers. Owing to this property of the fiber, a nonwoven fabric can be produced advantageously from the fiber.

3. 发明专利

DE69606007D1 未知
公开(公告)号：DE69606007D1
公开(公告)日：2000-02-10
申请号：DE69606007
申请日：1996-10-18
申请人： KURARAY CO
发明人： OHMORY AKIO , YOSHIMOCHI HAYAMI , SANO TOMOYUKI , KOBAYASHI SATORU , NARAMURA SYUNPEI , SATOH MASAHIRO
IPC分类号： C04B16/06 , D01F6/34 , D01F6/36 , D01F6/38 , D01F8/08 , D01F8/10 , D04H1/42 , D04H13/02 , D04H1/46 , C08K7/02
摘要： By dissolving a vinyl alcohol polymer (A) and an incompatible vinyl polymer (B), preferably an acrylonitrile polymer in a common solvent to prepare a spinning stock solution of a phase separation structure wherein the polymer (B) is present at particle sizes of 2 to 50 mu m, and wet spinning or dry-wet spinning the resulting spinning stock solution in a solidifying bath containing a mixture of an organic solvent capable of solidifying both the polymers (A) and (B) and the solvent of the spinning stock solution at a weight ratio of 25/75 to 85/15, thereby drawing the resulting yarn by 8-fold or more, a fiber is provided; and from the fiber can be produced a fibril with good hydrophilicity, a higher strength, and excellent heat fusion resistance, along with excellent wiping performance, filtering performance, micro-particle capturing properties and reinforcing performance, readily, stably and inexpensively.

4. 发明专利

AU3744697A Easily fibrillable fiber 未知
公开(公告)号：AU3744697A
公开(公告)日：1997-12-09
申请号：AU3744697
申请日：1996-05-20
申请人： KURARAY CO , MATSUSHITA ELECTRIC IND CO LTD
发明人： OHMORY AKIO , YOSHIMOCHI HAYAMI , SANO TOMOYUKI , KOBAYASHI SATORU , NARAMURA SYUNPEI , SATOH MASAHIRO
IPC分类号： D01F6/14 , D01D5/36 , D01F8/02 , D01F8/10 , D04H13/02
摘要： PCT No. PCT/JP96/01322 Sec. 371 Date Jan. 20, 1998 Sec. 102(e) Date Jan. 20, 1998 PCT Filed May 20, 1996 PCT Pub. No. WO97/44511 PCT Pub. Date Nov. 27, 1997A fiber of sea-islands phase separation wherein the sea component comprises a vinyl alcohol based polymer with high orientation and great crystallinity and the islands component comprises a water-insoluble cellulose based polymer with excellent absorptivity of alkaline solutions, thermal resistance and heat fusion resistance, and wherein the size of the islands is 0.03 to 10 mu m and the strength is 3 g/d or more, is readily disintegrated into a fibril of a diameter of 0.05 to 8 mu m when a mechanical stress is imposed onto the fiber wet in water. From the fibril with good hydrophilicity, high strength, great particle captivity and excellent reinforcing performance, and additionally with good absorptivity of alkaline solutions and great thermal resistance and heat fusion resistance, none of the fiber components therein is solubilized during fibrillation. Neither a beating process nor a beating solution causes foaming or environmental pollution. The fibril is extremely useful for use in separator sheets for alkaline batteries, reinforcing fibers of cement slate plates, reinforcing fibers of frictional materials and the like.

5. 发明专利

DE69416051T2 未知
公开(公告)号：DE69416051T2
公开(公告)日：1999-06-10
申请号：DE69416051
申请日：1994-07-27
申请人： KURARAY CO
发明人： OHMORY AKIO , SANO TOMOYUKI , NARAMURA SYUNPEI , KOBAYASHI SATORU
IPC分类号： D01F6/14
摘要： The process of the present invention comprises wet spinning or dry-jet-wet spinning a PVA-based polymer soluble in water at not more than 100 DEG C while using a dope solvent and a solidifying solvent each comprising an organic solvent, wet drawing the solidified filaments, subjecting the drawn filaments to extraction treatment and then drying, and further subjecting the filaments to heat shrinking treatment under multi-stage temperature elevation condition. The water soluble fibers of the present invention obtained by this process, while having a low water dissolution temperature of not more than 100 DEG C, have a markedly small maximum shrinkage in water and has high tensile strength and small ash content. The water soluble fibers of the present invention are suitably used for chemical lace base fabrics and blended yarns with wool or jute.

6. 发明专利

DE69415124T2 未知
公开(公告)号：DE69415124T2
公开(公告)日：1999-05-06
申请号：DE69415124
申请日：1994-10-11
申请人： KURARAY CO
发明人： OHMORY AKIO , SANO TOMOYUKI , SATOH MASAHIRO , NARAMURA SYUNPEI , KOBAYASHI SATORU , SEKIYA YOSUKE
IPC分类号： D01F8/10 , D04H1/54
摘要： By mixing a high-melting polyvinyl alcohol type polymer (A) and a low-melting water-soluble polymer (B) in a solvent for the polymer (A) to prepare a spinning solution and then subjecting the solution to low-temperature spinning so that the resulting filaments are solidified uniformly in the cross-sectional direction, there is formed a fiber of sea-islands structure comprising said high-melting polyvinyl alcohol type polymer (A) as the sea component and said low-melting water-soluble polymer (B) as the islands component. In this fiber, at least part of the islands component is present in a fiber zone ranging from the fiber surface to 2 mu m inside and the fiber surface contains substantially no islands component. This fiber ordinarily shows the performance of the matrix phase, i.e. the performance of a high-melting polyvinyl alcohol fiber; however, when the fiber is pressurized at high temperatures, the low-melting polymer (the islands component) is pushed out onto the fiber surface and there occurs heat bonding between fibers. Owing to this property of the fiber, a nonwoven fabric can be produced advantageously from the fiber.

7. 发明专利

DE69415124D1 未知
公开(公告)号：DE69415124D1
公开(公告)日：1999-01-21
申请号：DE69415124
申请日：1994-10-11
申请人： KURARAY CO
发明人： OHMORY AKIO , SANO TOMOYUKI , SATOH MASAHIRO , NARAMURA SYUNPEI , KOBAYASHI SATORU , SEKIYA YOSUKE
IPC分类号： D01F8/10 , D04H1/54
摘要： By mixing a high-melting polyvinyl alcohol type polymer (A) and a low-melting water-soluble polymer (B) in a solvent for the polymer (A) to prepare a spinning solution and then subjecting the solution to low-temperature spinning so that the resulting filaments are solidified uniformly in the cross-sectional direction, there is formed a fiber of sea-islands structure comprising said high-melting polyvinyl alcohol type polymer (A) as the sea component and said low-melting water-soluble polymer (B) as the islands component. In this fiber, at least part of the islands component is present in a fiber zone ranging from the fiber surface to 2 mu m inside and the fiber surface contains substantially no islands component. This fiber ordinarily shows the performance of the matrix phase, i.e. the performance of a high-melting polyvinyl alcohol fiber; however, when the fiber is pressurized at high temperatures, the low-melting polymer (the islands component) is pushed out onto the fiber surface and there occurs heat bonding between fibers. Owing to this property of the fiber, a nonwoven fabric can be produced advantageously from the fiber.

8. 发明专利

DE69606007T2 未知
公开(公告)号：DE69606007T2
公开(公告)日：2000-09-14
申请号：DE69606007
申请日：1996-10-18
申请人： KURARAY CO
发明人： OHMORY AKIO , YOSHIMOCHI HAYAMI , SANO TOMOYUKI , KOBAYASHI SATORU , NARAMURA SYUNPEI , SATOH MASAHIRO
IPC分类号： C04B16/06 , D01F6/34 , D01F6/36 , D01F6/38 , D01F8/08 , D01F8/10 , D04H1/42 , D04H13/02 , D04H1/46 , C08K7/02
摘要： By dissolving a vinyl alcohol polymer (A) and an incompatible vinyl polymer (B), preferably an acrylonitrile polymer in a common solvent to prepare a spinning stock solution of a phase separation structure wherein the polymer (B) is present at particle sizes of 2 to 50 mu m, and wet spinning or dry-wet spinning the resulting spinning stock solution in a solidifying bath containing a mixture of an organic solvent capable of solidifying both the polymers (A) and (B) and the solvent of the spinning stock solution at a weight ratio of 25/75 to 85/15, thereby drawing the resulting yarn by 8-fold or more, a fiber is provided; and from the fiber can be produced a fibril with good hydrophilicity, a higher strength, and excellent heat fusion resistance, along with excellent wiping performance, filtering performance, micro-particle capturing properties and reinforcing performance, readily, stably and inexpensively.

9. 发明专利

CA2227391A1 READILY FIBRILLATABLE FIBER 未知
公开(公告)号：CA2227391A1
公开(公告)日：1997-11-27
申请号：CA2227391
申请日：1996-05-20
申请人： KURARAY CO
发明人： KOBAYASHI SATORU , NARAMURA SYUNPEI , OHMORY AKIO , YOSHIMOCHI HAYAMI , SANO TOMOYUKI , SATOH MASAHIRO
IPC分类号： D01F6/14 , D01D5/36 , D01F8/02 , D01F8/10 , D04H13/02
摘要： A fiber of a sea-island phase separation structure in which the sea phase is made of a highly orientable and highly crystalline polyvinyl alcohol polymer, the island phase is made of a water-insoluble cellulosic polymer excellent in alkaline liquid absorbing capacity, heat resistance and difficulty of melting, the size of the island is 0.03 to 10 .mu.m and the strength is 3 g/d or above and which can easily be separated into fibrils 0.05 to 8 .mu.m in diameter by wetting the fiber and applying a mechanical stress to the resulting fiber. The above fibril is a hydrophilic and high-strength one which is excellent in the property of capturing fine particles, reinforcing effects, alkaline liquid absorption, and the resistances to heating and melting, does not cause the elution of fiber components in fibrillation, and is freed from the problematic bubbling in beating or the problem of environmental pollution due to a heating solution. The fibril is extremely useful as the separator paper for alkaline batteries, the reinforcing fiber for cement slates, the reinforcing fiber for friction materials, or the like.

10. 发明专利

DE69416051D1 未知
公开(公告)号：DE69416051D1
公开(公告)日：1999-03-04
申请号：DE69416051
申请日：1994-07-27
申请人： KURARAY CO
发明人： OHMORY AKIO , SANO TOMOYUKI , NARAMURA SYUNPEI , KOBAYASHI SATORU
IPC分类号： D01F6/14
摘要： The process of the present invention comprises wet spinning or dry-jet-wet spinning a PVA-based polymer soluble in water at not more than 100 DEG C while using a dope solvent and a solidifying solvent each comprising an organic solvent, wet drawing the solidified filaments, subjecting the drawn filaments to extraction treatment and then drying, and further subjecting the filaments to heat shrinking treatment under multi-stage temperature elevation condition. The water soluble fibers of the present invention obtained by this process, while having a low water dissolution temperature of not more than 100 DEG C, have a markedly small maximum shrinkage in water and has high tensile strength and small ash content. The water soluble fibers of the present invention are suitably used for chemical lace base fabrics and blended yarns with wool or jute.

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