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111. 发明专利

JP2001271221A POLYVINYL ALCOHOL-BASED FIBER 失效
公开(公告)号：JP2001271221A
公开(公告)日：2001-10-02
申请号：JP2000082265
申请日：2000-03-23
申请人： KURARAY CO
发明人： OMORI AKIO , HIKASA SHINTARO , SATO MASAHIRO , TOKUNAGA ISAO , FUJIWARA NAOKI
IPC分类号： C08F8/12 , C08F16/06 , D01F6/14
摘要： PROBLEM TO BE SOLVED: To obtain a polyvinyl alcohol-based fiber having improved mechanical performances. SOLUTION: This polyvinyl alcohol-based fiber comprises a vinyl alcohol- based polymer containing >=1.8% 1,2 glycol bond amount.

112. 发明专利

JP2001123318A METHOD FOR SPINNING/FORMING FILM 失效
公开(公告)号：JP2001123318A
公开(公告)日：2001-05-08
申请号：JP29605099
申请日：1999-10-19
申请人： KURARAY CO
发明人： INADA SHINYA , OMORI AKIO
IPC分类号： B01D67/00 , B01D39/16 , B01D71/38 , C08J5/18 , D01D1/10 , D01F6/14
摘要： PROBLEM TO BE SOLVED: To provide a method for spinning/forming a film, in which a spinning solution (spinning dope) or a film-forming solution having excellent production process stability is efficiently selected. SOLUTION: A method for spinning/forming a film by using a polymer solution prepared by dissolving a polymer in a solvent, in which a polymer solution having t/T>=0.2 is selected and used as the polymer solution, wherein, when a diluted solution obtained by diluting an arbitrary polymer solution in a polymer concentration of

113. 发明专利

JP2000262607A WOUND COATING MATERIAL 失效
公开(公告)号：JP2000262607A
公开(公告)日：2000-09-26
申请号：JP6812099
申请日：1999-03-15
申请人： KURARAY CO
发明人： NAKAJIMA TOSHIHIDE , YAMADA HIDEAKI , OKI HIROYUKI , UEHARA YOSHITAKA , MATSUDA KAZUO , SATO MASAHIRO , OMORI AKIO
IPC分类号： A61L15/16 , A61F13/00 , D01F6/14
摘要： PROBLEM TO BE SOLVED: To improve the absorbency of a transudate and the holdability of a moist environment by using the fiber obtained by wet process gel spinning of a spinning stock solution prepared by dissolving or dispersing a polyvinyl alcohol(PVA) polymer in a solvent or dispersion medium mainly composed of an organic solvent into a solidifying bath. SOLUTION: A large amount of the leaching liquid from a wound surface is absorbed and gelatinized, by which the wound is protected, moisture is adequately held and transpirated and the moist environment suitable for wound heeling is formed. The fiber obtained by wet process gel spinning or dry/wet process gel spinning of the spinning stock solution prepared by dissolving or dispersing the PVA polymer in the solvent or dispersion medium mainly composed of the organic solvent into the solidifying bath is used. The organic solvent to be used is preferably dimethyl sulfoxide in terms of low-temperature solubility, low toxicity and low corrosiveness, and the content of the organic solvent in the solvent or dispersion medium is preferably >=60 wt.%.

114. 发明专利

JP2000226720A CELLULOSE YARN HAVING CONTROLLED FIBRILLATION AND ITS PRODUCTION 失效
公开(公告)号：JP2000226720A
公开(公告)日：2000-08-15
申请号：JP2701799
申请日：1999-02-04
申请人： KURARAY CO
发明人： INUYAMA AKITOMO , OMORI AKIO , ISHII SHIGENOBU , MAEDA SATOSHI , AKIYAMA SHOJI
IPC分类号： D01F2/00 , D01F2/02
摘要： PROBLEM TO BE SOLVED: To obtain a cellulose yarn having high dry and wet strengths and Young's modulus and greatly improved fibrillation resistance characteristics, which has not been sufficiently solved in known conventional method, by a production method friendly to the global environment. SOLUTION: A cellulose spinning dope dissolved in a mixed solvent of tertiary amine oxide/water is subjected to dry-wet spinning using a low-temperature solidifying bath having a specific ratio of methanol/water to give a cellulose filament having 30-48% crystallization degree of cellulose, >=1.8 g/dtex wet strength and, in fibrillation evaluation in a wet state, =100 μm length.

115. 发明专利

JPH11286827A FLAME-RETARDANT POLYVINYL ALCOHOL FIBER AND ITS PRODUCTION 失效
公开(公告)号：JPH11286827A
公开(公告)日：1999-10-19
申请号：JP9416698
申请日：1998-04-07
申请人： KURARAY CO
发明人： TOKUNAGA ISAO , INADA SHINYA , SATO MASAHIRO , OMORI AKIO
IPC分类号： D01F1/07 , D01D5/34 , D01F6/50 , D01F8/10
摘要： PROBLEM TO BE SOLVED: To obtain the subject flame-retardant fiber having excellent color and dry- and-wet dimensional stability and useful for protective wear, etc., by dissolving a vinyl alcohol polymer and a halogen-containing vinyl polymer in a common solvent and spinning the obtained spinning dope under a specific condition. SOLUTION: The objective flame-retardant polyvinyl alcohol fiber having a sea- island structure comprising a sea component composed of a vinyl alcohol polymer and an island component composed of a halogen-containing polymer and having a color difference of

116. 发明专利

JPH11256119A WATER-SOLUBLE ADHESIVE TAPE AND SPLICING TAPE 失效
公开(公告)号：JPH11256119A
公开(公告)日：1999-09-21
申请号：JP5919898
申请日：1998-03-11
申请人： KURARAY CO
发明人： OMORI AKIO , SHIRAKI KUNIHIRO , MURAKI KAZUHIRO
IPC分类号： C09J7/04 , C09J133/00 , C09J133/02 , C09J133/26 , C09J201/00
摘要： PROBLEM TO BE SOLVED: To obtain the subject tape with excellent solubility in water, mechanical performance, dimensional stability, handleability and others by providing one side or both sides of a fabric base consisting of water-soluble fiber with water-soluble adhesive layer(s) and also by incorporating the corresponding water-soluble adhesive in the fabric base. SOLUTION: This tape is obtained by providing one side or both sides of a fabric base consisting of water-soluble fiber with water-soluble adhesive layer (s) and also by incorporating the corresponding water-soluble adhesive in the fabric base so as to be

117. 发明专利

JPH11107044A POLYVINYL ALCOHOL-BASED FLAME-RETARDANT YARN AND ITS PRODUCTION 失效
公开(公告)号：JPH11107044A
公开(公告)日：1999-04-20
申请号：JP27403597
申请日：1997-10-07
申请人： KURARAY CO
发明人： OMORI AKIO , INADA SHINYA , SATO MASAHIRO , TOKUNAGA ISAO , KUBOTSU AKIRA
IPC分类号： D01F1/07 , D01D1/02 , D01F8/10
摘要： PROBLEM TO BE SOLVED: To obtain the subject inexpensive flame-retardant yarn having excellent dry and wet dimensional stabilities, useful as clothing, by spinning a spinning dope comprising a vinyl alcohol-based polymer, a halogen-containing polymer and a tin compound, etc., under specific conditions. SOLUTION: A halogen-containing polymer 2, one or more compounds 3 selected from the group consisting of a tin compound and an antimony compound are dissolved/ dispersed in a dope solvent in an amount of the component 3 added of 0.1-10% based on the total weight. The component 3 is dispersed in the solution of the component 2, the obtained solution is mixed with a vinyl alcohol-based polymer 1. A spinning dope having a phase structure in which islands of particles composed of the solution of the component 2, having 2-100 μm particle diameters exist in the solution of the component 1 is spun and drawn to give the objective polyvinyl alcohol-based flame- retardant yarn composed of the component 1 as a sea component and the component 2 as an island component. The sizes of the islands are 0.2-8 μm and 10 wt.% of the component 3 exists in the island component or at the boundary between the sea component and the island component. Preferably the blending ratio of the component 1 to the component 2 is 95/5 to 55/45.

118. 发明专利

JPH11100718A READILY FIBRILLATING FIBER AND ITS PRODUCTION 失效
公开(公告)号：JPH11100718A
公开(公告)日：1999-04-13
申请号：JP26357397
申请日：1997-09-29
申请人： KURARAY CO
发明人： INADA SHINYA , NISHIYAMA SHOICHI , SATO MASAHIRO , OMORI AKIO
IPC分类号： D01F6/14 , D01F6/50
摘要： PROBLEM TO BE SOLVED: To produce a readily fibrillating fiber capable of providing a uniform sheet good in reinforcing activities and formation required for a use in rubber reinforcement and a nonwoven fabric, and further to provide a production method thereof. SOLUTION: This readily fibrillating fiber is obtained by dissolving (A) a vinyl alcoholic polymer and (B) a polymer incompatible with the polymer A in a common organic solvent, carrying out a wet spinning of the obtained dope into a solidifying bath comprising a solidifying solvent having solidifying ability against the polymers A and B and the above organic solvent or a dry spinning thereof, removing the organic solvent included in the formed fiber, drying the resultant fiber by a substituting bath, drawing the dried fiber and subjecting the drawn fiber to a dry-heat treatment under a specific condition to provide the readily fibrillating fiber having =50 sec fibrillation index and >=70% retention of the fibrillation index after allowing the fiber to stand at 60 deg.C in 90% RH for 1 week.

119. 发明专利

JPH10310931A PRODUCTION OF EASILY FIBRILLABLE POLYVINYL ALCOHOL-BASED FIBER 失效
公开(公告)号：JPH10310931A
公开(公告)日：1998-11-24
申请号：JP11554697
申请日：1997-05-06
申请人： KURARAY CO
发明人： MATSUMOTO YOICHI , MURAKAMI KATSUYA , NISHIYAMA SHOICHI , SAKURAGI ISAO , OMORI AKIO
IPC分类号： D01F6/14
摘要： PROBLEM TO BE SOLVED: To provide a process for producing a fibrillable polyvinyl alcohol-based fiber quickly fibrillable to ultrafine fibrils having a diameter of 2-3 μm or below. SOLUTION: A polyvinyl alcohol and a polymer soluble in dimethyl sulfoxide (DMSO) represented by polyacrylonitrile are dissolved in DMSO, the obtained dope is spun into a coagulation bath composed mainly of methanol, DMSO is extracted from the fiber until the DMSO content of the fiber becomes =4C ketone represented by methyl isobutyl ketone is applied to the fiber together with water to extract and remove a part of methanol, the fiber is dried in a gas having a methanol concentration of 3-20 vol.% at

120. 发明专利

JPH10219517A PRODUCTION OF POLYVINYL ALCOHOL-BASED FIBER 失效
公开(公告)号：JPH10219517A
公开(公告)日：1998-08-18
申请号：JP2252597
申请日：1997-02-05
申请人： KURARAY CO
发明人： NISHIYAMA SHOICHI , MATSUMOTO YOICHI , SAKURAGI ISAO , OMORI AKIO
IPC分类号： D01F6/50 , D01F6/14
摘要： PROBLEM TO BE SOLVED: To produce a polyvinyl alcohol fiber, capable of being finely and rapidly fibrillated and easily developable into the field for reinforcing nonwoven fabrics or rubbers by spinning a specific spinning solution into a solidification bath and manufacturing a yarn under specified conditions. SOLUTION: A solution prepared by dissolving 55-80wt.% polyvinyl alcohol having >=1,500 polymerization degree and >=99.5mol% saponification degree and a polymer selected from the group consisting of polyacrylontrile, polymethyl methacrylate and cellulose acetate in dimethyl sulfoxide is spun into a solidification bath consisting essentially of methanol. The dimethyl sulfoxide is then extracted from the fiber until the dimethyl sulfoxide content in the fiber attains =4 carbon atoms in an amount of >=5wt.% and water are then applied to the fiber and the resultant fiber is subsequently dried until the solvent content attains

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