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公开(公告)号：JP2000226736A
公开(公告)日：2000-08-15
申请号：JP2946699
申请日：1999-02-08
Applicant: TORAY INDUSTRIES
Inventor： TAWARA AKIO , MAEDA YUHEI , OKUMURA YOSHIHARU
Abstract: PROBLEM TO BE SOLVED: To obtain a core-sheath type conjugate fiber having a high specific gravity and a high strength, excellent in biodegradability and useful for fishing nets, curtains, etc., by including a prescribed amount of inorganic particles in a core part in a ratio of the core part within a prescribed range and providing the fiber with a prescribed fiber strength and a prescribed fiber specific gravity. SOLUTION: This conjugate fiber is a core-sheath type conjugate fiber comprising both a core part and a sheath part composed of a biodegradable polymer which is an aliphatic polyester such as poly-L-lactic acid. Inorganic particles which are metal compound particles having >=3 specific gravity such as barium sulfate in an amount of 12-80 wt.% are contained in the core part and the core part accounts for 9-60 wt.% of the conjugate fiber. The fiber strength is >=3.1 cN/dtex and the fiber specific gravity is >=1.45. The core-sheath type conjugate fiber preferably has >=7.65 dtex single fiber fineness.
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公开(公告)号：JP2000220054A
公开(公告)日：2000-08-08
申请号：JP2094399
申请日：1999-01-29
Applicant: TORAY INDUSTRIES
Inventor： MAEDA YUHEI , TAWARA AKIO , OKUMURA YOSHIHARU
Abstract: PROBLEM TO BE SOLVED: To obtain a sheet for civil engineering work capable of being prevented from weathering during building construction and hardly damaged by a falling earthflow by forming the sheet comprising at least a woven fabric whose warp is made of aliphatic polyester fiber. SOLUTION: This sheet is obtained by preparing a warp and/or weft of aliphatic polyester fiber mainly comprising L-lactic acid and having a fineness of monofilament of =15 to 40%, ductility of 15 to 40% and melting point of >=130 deg.C and by employing as part of the sheet a woven fabric, e.g. plain weave fabric or leno clothe, using the warp and/or weft and having a weave density of 1,000 to 1,000,000 dtex/inch.
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公开(公告)号：JPH11350292A
公开(公告)日：1999-12-21
申请号：JP15505198
申请日：1998-06-03
Applicant: TORAY INDUSTRIES
Inventor： KAWAKAMI DAISUKE , TAWARA AKIO , MAEDA YUHEI
Abstract: PROBLEM TO BE SOLVED: To obtain a sheet for civil engineering work strong to impacts strength caused from heavy goods or the like by comprising a thermoplastic synthetic fiber which has coefficient of dynamic friction less than a specific value, as warp and/or weft. SOLUTION: This sheet for civil engineering work is obtained by using the thermoplastic synthetic filaments having tensile strength >=6.0 cN/dtex and 15 to 40% of elongation, coated surface with a compound selected from the organic silicone compound, for example, dimethylsiloxane and an organic fluorocompound, for example fluoroalcohol or polymer wax such as polyethylene wax in amount of 0.01% (based on the weight of the filaments) to have the coefficient of dynamic friction less than 0.01%, such as polyester filaments or polyamide filaments as the warp and/or weft to form a plain weave or the like having texture of 1000 to 1000000 dtex/in.
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公开(公告)号：JPH11337681A
公开(公告)日：1999-12-10
申请号：JP14151798
申请日：1998-05-22
Applicant: TORAY INDUSTRIES
Inventor： MAEDA YUHEI , TAWARA AKIO
Abstract: PROBLEM TO BE SOLVED: To provide radiation protection cloths and products, having radiation shield capability without environmental problems. SOLUTION: Radiation protection clothes or sheets, of which constituting parts at least is consisting partly of sheathed core complex fiber of which core is made to consist of thermoplastic polymer containing particles of simple substance or compound of 20 wt.% or more and 80 wt.% or less of element of atomic number of 40 or more. The sheath part of the complex fiber consists of thermal plastic polymer and the core part fraction in the complex fiber is set to 40 wt.% or more and 85 wt.% or less and the strength is set to 2.7 cN/dtex or more.
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公开(公告)号：JPH10273810A
公开(公告)日：1998-10-13
申请号：JP7868997
申请日：1997-03-31
Applicant: TORAY INDUSTRIES
Inventor： OKUMURA YOSHIHARU , MAEDA YUHEI , MATSUDA KATSUNORI
Abstract: PROBLEM TO BE SOLVED: To simply and stably form a layer coating the surfaces of the parts to interrupt the contact of the molten polymer with the surfaces in a melt- extrusion spinning machine and satisfactorily inhibit the gelation and deterioration caused by the direct contact between the melt-extrusion spinning machine and the molten polymer. SOLUTION: In a melt-extrusion spinning machine for synthetic fibers, the surfaces of the spinning machine are coated with a layer comprising oxides, nitrides or carbides of any metal selected from among Si, Ti, Zr, Al, W, B, Ta and Ge. SiO2 , TiO2 , ZrO2 and Al2 O3 are preferred as the coating layer. As parts in the melt-spinning machine to be coated with the metal compound, are cited the inner walls of the spinneret and/or the filtration material.
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Patent Agency Ranking
公开(公告)号：JPH10168661A
公开(公告)日：1998-06-23
申请号：JP32201196
申请日：1996-12-02
Applicant: TORAY INDUSTRIES , TORAY MONOFILAMENT CO
Inventor： MASUDA TOYOHIKO , MAEDA YUHEI , HORII KEI , KINOSHITA AKIRA , YAMADA HIROTOKU , ASAI CHO
Abstract: PROBLEM TO BE SOLVED: To obtain a polyester composition excellent in hydrolysis resistance and dry heat resistance, and suitable for a constituting material of a dryer canvas for a paper making, a paper making wire (a net for the paper making), a net converter for a heat adhesion process of a nonwoven fabric, a conveyer belt in a dryer or a heat treating machine and various filters, and various industrial formed materials, and a polyester monofilmanent consisting of the polyester composition. SOLUTION: The polyester composition, the polyester monofilament consisting of the polyester composition of the industrial woven fabric using the monofilament at least in part such as a dryer canvas for a paper making, etc., contain (A) 70-99.8wt.% polyester and (B) 0.2-30wt.% styrene-based polymer having a syndiotactic structure, etc., also (C) 0.04-1.5 pt.wt. un-reaceted state monocarbodiimide compound and (D) 0.05-1.5 pt.wt. polycarbodiimide compound based on 100 pts.wt. total amount of the components (A) and (B), and has g carboxyl terminal group concentration.
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公开(公告)号：JPH09268447A
公开(公告)日：1997-10-14
申请号：JP7393196
申请日：1996-03-28
Applicant: TORAY INDUSTRIES
Inventor： FUKUOKA MITSURU , MAEDA YUHEI , MATSUOKA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To obtain a false twisted yarn, having smooth and soft feeling, excellent in bulkiness and suitable for a woven or knit fabric, etc., by treating plural kinds of polyethylene terephthalate, among which the difference of copolymerization ratios exceeds a specified value and the difference of intrinsic viscosities is below a specified value, under specific conditions. SOLUTION: Two kinds of polyethylene terephthalate A and B, which have a difference of the ratios of copolymerization of 5.0-15.0mol%, a difference of intrinsic viscosities of =0.6, are spun out from a side-by-side conjugate spinneret at a conjugate ratio of 8/2 to 2/8 to obtain an undrawn yarn, subsequently the obtained undrawn yarn is treated for false twist processing after or on the drawing to obtain the objective false twisted yarn.
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公开(公告)号：JPH09256221A
公开(公告)日：1997-09-30
申请号：JP7020996
申请日：1996-03-26
Applicant: TORAY INDUSTRIES
Inventor： UCHIDA MINORU , MAEDA YUHEI
Abstract: PROBLEM TO BE SOLVED: To provide the subject fibers having desired high dimensional stability, having high strength and excellent in durability by containing respectively a specific amount of a nickel compound and an antimony compound. SOLUTION: A polyester containing a nickel compound (e.g. nickel acetate) in an amount of 2-120ppm reduced to a nickel metal and an antimony compound (e.g. antimony trioxide) in an amount of 150-450ppm reduced to an antimony metal is fiberized and a total amount of intermediate elongation (elongation corresponding to 4.5g/d stress in a stress-strain curve; defined in this invention) and dry heat shrinkage (at 150 deg.C) is made to be 8-12% to obtain the objective polyester fiber.
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公开(公告)号：JPH09256220A
公开(公告)日：1997-09-30
申请号：JP7020796
申请日：1996-03-26
Applicant: TORAY INDUSTRIES
Inventor： UCHIDA MINORU , MAEDA YUHEI
Abstract: PROBLEM TO BE SOLVED: To provide the subject fibers having desired high dimensional stability, excellent in heat resistance, and capable of replacing rayon by containing respectively a specific amount of a nickel compound and an antimony compound. SOLUTION: A polyester containing a nickel compound (e.g. nickel acetate) in an amount of 2-120ppm reduced to a nickel metal and an antimony compound (e.g. antimony trioxide) in an amount of 150-450ppm reduced to an antimony metal is fiberized and a total amount of intermediate elongation (elongation corresponding to 4.5g/d stress in a stress-strain curve; defined in this invention) and dry heat shrinkage (at 150 deg.C) is made to
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公开(公告)号：JPH09255853A
公开(公告)日：1997-09-30
申请号：JP7020196
申请日：1996-03-26
Applicant: TORAY INDUSTRIES , TORAY MONOFILAMENT CO
Inventor： MASUDA TOYOHIKO , MAEDA YUHEI , HORII KEI , KINOSHITA AKIRA
Abstract: PROBLEM TO BE SOLVED: To obtain a polyester composition which comprises a polyester bearing chain terminal groups of a specific structure and a carbodiimide unreactive with the polyester in an specific proportion and is excellent in resistance to hydrolysis and useful for a variety of industrial parts, clothing, magnetic tapes and the like. SOLUTION: (A) A polyester bearing more than 5 equivalents/10 g of at least one chain-terminal group of formulas I and II (R is H, N-methylene- phthalimide, N-methylene-alkyl-substituted phthalimide, a 1-20C alkyl, phenyl; X is H, a reaction residue of carbodiimide) contains (B) 0.005-1.5wt.% of an unreactive carbodiimide (preferably N,N'-di-2,6-diisopropylphenylcarbodiimide). The component A is suitably polyethylene terephthalate or polybutylene terephthalate. Polyester monofilaments can be produced from this polyester composition and woven fabrics for industrial purposes are produced therefrom.
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