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公开(公告)号：JP2002030523A
公开(公告)日：2002-01-31
申请号：JP2000213874
申请日：2000-07-14
Applicant: TORAY INDUSTRIES
Inventor： MATSUMOTO HIROSHIGE , MAEDA YUHEI , ARANISHI YOSHITAKA
IPC: C08L67/04 , C08L101/16 , D01F6/62 , D01F6/92
Abstract: PROBLEM TO BE SOLVED: To obtain a polylactic acid fiber having a high strength and high heat resistance. SOLUTION: This polylactic acid fiber is characterized in that the polylactic acid fiber obtained by a melt spinning method comprises a blend of a poly(L- lactic acid) and a poly(D-lactic acid) and has >=2.6 cN/dTex strength and the ratio ΔHh/ΔH1 of an entotherm ΔH1 based on the crystal fusion of single crystal of poly(L-lactic acid) and single crystal of poly(D-lactic acid) obtained by DSC measurement to entotherm ΔHh based on crystal fusion of stereocomplex crystal composed of poly(L-lactic acid) and poly(D-lactic acid) of >=10.
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公开(公告)号：JP2002030208A
公开(公告)日：2002-01-31
申请号：JP2000213875
申请日：2000-07-14
Applicant: TORAY INDUSTRIES
Inventor： MATSUMOTO HIROSHIGE , MAEDA YUHEI , ARANISHI YOSHITAKA
Abstract: PROBLEM TO BE SOLVED: To provide a polylactic acid resin composition having high heat resistance and hydrolysis resistance, and provide its molded article such as fiber and film. SOLUTION: The polylactic acid resin composition is a blended product of poly-L-lactic acid and poly-D-lactic acid wherein at least a part of the carboxyl terminal group of the poly-L-lactic acid and/or the poly-D-lactic acid is blocked.
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公开(公告)号：JP2001261797A
公开(公告)日：2001-09-26
申请号：JP2000070098
申请日：2000-03-14
Applicant: TORAY INDUSTRIES
Inventor： MATSUMOTO HIROSHIGE , MASUDA TOYOHIKO , MAEDA YUHEI
IPC: C08J5/00 , C08G63/06 , C08G63/685 , C08J5/18 , C08L101/16
Abstract: PROBLEM TO BE SOLVED: To provide an aliphatic polyester resin in which practically sufficient high molecular weight, high hydrolytic resistance and heat resistance are combined and a molded product such as fiber or film. SOLUTION: This aliphatic polyester resin is characterized in that a part or all of carboxy group ends of an aliphatic polyester are substantially blocked by a monocarbodiimide compound in which temperature exhibiting 5% weight reduction measured by TG-DTA is >=170 deg.C.
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公开(公告)号：JP2001336028A
公开(公告)日：2001-12-07
申请号：JP2000159886
申请日：2000-05-30
Applicant: TORAY INDUSTRIES
Inventor： ARANISHI YOSHITAKA , MATSUMOTO HIROSHIGE , MAEDA YUHEI
IPC: D01F6/62
Abstract: PROBLEM TO BE SOLVED: To create an aliphatic polyester fiber having small shrinkage in hot water, especially the small shrinkage as a textile structure. SOLUTION: This low-shrinkage aliphatic polyester fiber is characterized in that the maximum value of a shrinkage stress is 0-0.2 cN/dtex, and the shrinkage S0 in boiling water under no load and the shrinkage S1 in the boiling water under 0.01 cN/dtex satisfy a specific relation.
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公开(公告)号：JP2000234234A
公开(公告)日：2000-08-29
申请号：JP3191499
申请日：1999-02-09
Applicant: TORAY INDUSTRIES
Inventor： MATSUMOTO HIROSHIGE , OKUMURA YOSHIHARU , MAEDA YUHEI
Abstract: PROBLEM TO BE SOLVED: To obtain a webbing for a sheet belt having a conventionally not available marked light fastness and practically sufficient mechanical strengths simultaneously, and excellent in biodegradability by constituting its warp yarns, etc., with a fiber consisting mainly of an aliphatic polyester having a prescribed melting point. SOLUTION: This webbing for a sheet belt is obtained by constituting its warp yarns and/or weft yarns with a fiber consisting mainly of an aliphatic polyester such as a polylactic acid, etc., having >=130 deg.C melting point and >=4.5 cN/dtex fiber strength. Further, it is preferable that the fiber consists mainly of the aliphatic polyester having >=150 deg.C, further preferably >=170 deg.C melting point as above and >=5.0 cN/dtex strength, and in view of making its energy absorbing property as excellent one, in the case of using the fiber as the warp yarn for the webbing for the sheet belt, its elongation is preferably >=20%.
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Patent Agency Ranking
公开(公告)号：JP2000226757A
公开(公告)日：2000-08-15
申请号：JP2653899
申请日：1999-02-03
Applicant: TORAY INDUSTRIES
Inventor： OKUMURA YOSHIHARU , MATSUMOTO HIROSHIGE , MAEDA YUHEI
Abstract: PROBLEM TO BE SOLVED: To obtain a safety net having sufficient mechanical excellent weather resistance and performances biodegradability by using aliphatic polyester-based fibers (preferably spun dyed fibers) which have a melting point of a specific temperature or higher and preferably contain lactic acid as a main component and a multi-functional phosphorus compound. SOLUTION: This safety net comprises fibers consisting mainly of an aliphatic polyester having a melting point of >=130 deg.C. The safety net is preferably obtained by doubling spun-dyed multi-filament yarns and then knitting the doubled yarns by means of a Raschel knitting machine or the like. The spun-dyed multi-filament yarns consist mainly of the aliphatic polyester having a melting point of >=130 deg.C, further contain a bifunctional phosphorus compound, such as dimethyl phenylphosphate, in an amount of 0.1-1.5%, have a breaking strength of >=4.5 CN/dtex, preferably >=5.0 CN/dtex, a breaking elongation of >=15%, preferably >=18%, and a fineness of 250-4,000 dtex, and comprise 200-500 filaments.
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公开(公告)号：JPH11200145A
公开(公告)日：1999-07-27
申请号：JP626398
申请日：1998-01-16
Applicant: TORAY INDUSTRIES
Inventor： MATSUMOTO HIROSHIGE , MAEDA YUHEI , TAKAHASHI HIROSHI
IPC: D01F6/92
Abstract: PROBLEM TO BE SOLVED: To stably and efficiently produce a polyester fiber having a high strength and a high elongation in combination. SOLUTION: This polyester fiber contains an aromatic ketone having =5 g/d strength T [g/d], >=20% elongation E [%] and >=220 toughness TO [g/d.%] represented by the following formula: formula: TO=T×E.
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公开(公告)号：JP2002227034A
公开(公告)日：2002-08-14
申请号：JP2001020318
申请日：2001-01-29
Applicant: TORAY INDUSTRIES
Inventor： KIMURA TOSHIAKI , MATSUMOTO HIROSHIGE , MAEDA YUHEI
Abstract: PROBLEM TO BE SOLVED: To obtain a polylactic acid fiber structure having excellent block color development and high heat resistance and a method for producing the same. SOLUTION: This polylactic acid fiber structure obtained by using a poly(lactic acid) fiber composed of a blend of a poly(L-lactic acid) and a poly(D- lactic acid) at least as a part is dyed with a black dye.
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公开(公告)号：JP2002212832A
公开(公告)日：2002-07-31
申请号：JP2001059775
申请日：2001-03-05
Applicant: TORAY INDUSTRIES
Inventor： ARANISHI YOSHITAKA , MATSUMOTO HIROSHIGE , MAEDA YUHEI
IPC: D01F6/62 , C08L101/16 , D02J1/22
Abstract: PROBLEM TO BE SOLVED: To provide a polylactic acid fiber especially capable of developing a feeling, such as making crapes or developing differences of yarn lengths, because the fiber can be properly shrunk especially when it is formed into a cloth structure. SOLUTION: This polylactic acid fiber has a shrinkage stress of 0.05-0.5 cN/dtex at 100 deg.C, a boiling water shrinkage rate under noload (S0) and a boiling water shrinkage rate under a load of 0.01 cN/dtex (S1) of which the both satisfy specific relations.
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公开(公告)号：JP2001323056A
公开(公告)日：2001-11-20
申请号：JP2000144641
申请日：2000-05-17
Applicant: TORAY INDUSTRIES
Inventor： MATSUMOTO HIROSHIGE , MASUDA TOYOHIKO , MAEDA YUHEI
IPC: C08J5/18 , C08G63/91 , C08L101/16
Abstract: PROBLEM TO BE SOLVED: To provide an aliphatic polyester resin which has a practically sufficiently high mol.wt., high hydrolysis resistance and high heat resistance, and to provide a formed article such as a fiber or film. SOLUTION: This aliphatic polyester resin characterized in that the carboxy groups of an aliphatic polyester are partially or substantially wholly sealed with one or more kinds of compounds selected from oxazoline compounds and oxazine compounds. Polylactic acid is preferably used as the aliphatic polyester.
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