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公开(公告)号：JPH0610210A
公开(公告)日：1994-01-18
申请号：JP102092
申请日：1992-01-07
Applicant: TORAY INDUSTRIES
Inventor： MIZUNO MASAHARU , UEDA FUJIO , TANAKA HIROYOSHI
Abstract: PURPOSE:To provide the subject PVA-based fiber excellent in water- and heat- resistance enough to satisfy practical performance without requirement for water insolubilization treatment such as acetalization and exhibiting a remarkably excellent performance, e.g. >=5.0g/d knot strength. CONSTITUTION:This high-strength polyvinyl alcohol-based fiber excellent in knot strength is characterized by its constituting polyvinyl alcohol-based polymer having >=2500 and =14g/d tensile strength, >=5.0g/d knot strength and difference in the birefringence values between the inner and outer layers of the fiber satisfying -8X10
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公开(公告)号：JPH0490772A
公开(公告)日：1992-03-24
申请号：JP20744790
申请日：1990-08-03
Applicant: TORAY INDUSTRIES , GOSEN KK
Inventor： MIZUNO MASAHARU , TANIGUCHI ATSUSHI , OHARA TOSHIYUKI , SUGANO KATSUO
IPC: A63B49/10 , A63B60/54 , A63B102/02 , A63B102/04 , A63B102/06
Abstract: PURPOSE:To restrain impact vibration in hitting a ball for comfortable play while maintaining the lightness and rigidity of a conventional carbon fiber reinforced FRP racket by making a racket of a one-way fiber reinforced composite material having carbon fibers and polyvinyl alcohol fibers arranged alternately or laminatedly. CONSTITUTION:A necessary number of laminated prepreg sheets is wound around a winding core tube and a rod-like core composing material having the winding core integrally folded therein to mold a rod-like frame molding material. Then the winding core is withdrawn and the molding material is inserted and tightened in a molding metal mold to be worked curvedly into a desired racket frame shape. Then, an opening ends of the rod-like frame molding material corresponding to the terminal end of a shaft is placed adjacent to the outside of the molding metal mold. Under such a condition, 5.5kg/cm of pressurized air is sent into the tube to expand the tube so that the prepreg is heated at 150 deg.C for 30 minutes to be set, and the racket frame is obtained which has hollow construction of an one-way fiber reinforced composite material having a shell formed of carbon fibers and polyvinyl alcohol system fibers.
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公开(公告)号：JPH03241004A
公开(公告)日：1991-10-28
申请号：JP3693790
申请日：1990-02-16
Applicant: TORAY INDUSTRIES
Inventor： TANIGUCHI ATSUSHI , TAKAMOTO ISAO , MIZUNO MASAHARU
Abstract: PURPOSE:To provide the subject monofilament having specific fineness, tensile strength, initial modulus, etc., composed of a PVA polymer having high polymerization degree, giving a screen gauze having high density and excellent dimensional stability and useful in the field of electronic industry, dyeing industry, etc. CONSTITUTION:The objective monofilament is composed of a PVA polymer having a polymerization degree of >=1,500 (preferably >=3,500) and has a fineness of 5-20d (preferably 5-15d), a tensile strength of >=10g/d (preferably >=12g/d), an initial modulus of >=200g/d (preferably >=250g/d), a knot strength of >=4g/d and a loop strength of >=8g/d.
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公开(公告)号：JPH03207723A
公开(公告)日：1991-09-11
申请号：JP208190
申请日：1990-01-08
Applicant: TORAY INDUSTRIES
Inventor： MIZUNO MASAHARU
IPC: C08J5/04
Abstract: PURPOSE:To obtain the subject composite material having light weight and quick vibration-damping capability and useful in the field of sports goods such as tennis racket or ski, speaker cone, flooring material, wall material, etc., by using an inorganic fiber in combination with PVA fiber as reinforcing materials. CONSTITUTION:The objective composite material preferably having a loss coefficient of >=0.01 and a half-life period of =15g/d and a tensile modulus of >=200g/d) in a fiber-reinforced composite material containing an inorganic fiber (preferably glass fiber and/or carbon fiber) as the reinforcing material.
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公开(公告)号：JPH0359135A
公开(公告)日：1991-03-14
申请号：JP19192889
申请日：1989-07-24
Applicant: TORAY INDUSTRIES
Inventor： TANIGUCHI ATSUSHI , TAKAMOTO ISAO , MIZUNO MASAHARU
Abstract: PURPOSE:To obtain the title sewing yarn consisting of a polyvinyl alcohol based polymer having a specific polymerization degree, composed of a polyvinyl alcohol fiber having specific tensile strength and excellent fatigue resistance and dimensional stability, etc. CONSTITUTION:A polyvinyl alcohol based polymer having =99mol% saponification degree is dissolved in a solvent and spun (preferably by dry wet type spinning or gel spinning) and drawn at a high drawing ratio to afford a polyvinyl alcohol fiber having >=15g/d tensile strength, preferably >=2500 times flexural abrasion fatigue and =12g/d tensile strength, preferably having >=70% weather resistant strength retaining ratio and suitable as a sewing yarn for leather product, etc.
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Patent Agency Ranking
公开(公告)号：JPH01156517A
公开(公告)日：1989-06-20
申请号：JP31162887
申请日：1987-12-09
Applicant: TORAY INDUSTRIES
Inventor： SUZUKI MITSUO , MIZUNO MASAHARU
Abstract: PURPOSE:To obtain the title fiber useful for the reinforcement of rubber such as tire cord, V-belt or hose or as a rope, conveyor belt, fishing net, etc., by spinning a dope of a PVA polymer having high polymerization degree and drawing the obtained fiber under specific condition. CONSTITUTION:The objective fiber having a tensile strength of >=15g/d, preferably >=20g/d, an elastic modulus of >=250g/d, preferably >=300g/d, a hot-water resistance of >=120 deg.C, preferably >=130 deg.C and a steam resistance index of >=50, preferably >=60 can be produced by spinning a dope of a PVA polymer having a polymerization degree of >=1,500, preferably >=3,500, drawing the obtained fiber at a draw ratio of >=3, preferably 3.5-7, treating the drawn fiber with a crosslinking agent (e.g., hydroperoxide) and subjecting to a dry-heat treatment at a draw ratio of >=3.
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公开(公告)号：JPH01118615A
公开(公告)日：1989-05-11
申请号：JP23278888
申请日：1988-09-16
Applicant: TORAY INDUSTRIES
Inventor： MIZUNO MASAHARU , FUJIOKA KOTARO , NAKADA HIDEO
Abstract: PURPOSE:To obtain the subject fiber having high tensile strength and not strength, excellent heat-resistance and chemical resistance and useful as industrial fiber, etc., by melt-spinning a polymer composed of an aromatic polyether ketone having a specific structure while preventing the thermal decomposition of the polymer. CONSTITUTION:A polymer composed of an aromatic polyether ketone having an intrinsic viscosity of >=0.7 and composed of the unit of formula accounting for >=80mol.% of the constituent recurring units is melted at 400 deg.C and extruded through a spinning nozzle without causing thermal decomposition of the polymer, cooled and wound to obtain an undrawn fiber. The fiber is drawn in a polyethylene glycol bath at 200 deg.C to obtain the objective fiber composed of a monofilament having a tensile strength of >=4.0g/d, a knot strength of >=3.0g/d and fiber diameter of 0.1-0.8mm.
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公开(公告)号：JPS63120107A
公开(公告)日：1988-05-24
申请号：JP26202686
申请日：1986-11-05
Applicant: TORAY INDUSTRIES
Inventor： UEDA FUJIO , HAYASHI MASAHIKO , MIZUNO MASAHARU
IPC: D01F6/14
Abstract: PURPOSE:To obtain PVA based fibers having excellent tensile strength, elastic modulus and hot water resistance, by spinning a high-molecular weight PVA based polymer solution, drawing the resultant coagulated yarn at a high draw ratio and acetalizing the drawn yarn at a specific stretching ratio. CONSTITUTION:A solution of a PVA based polymer having at least 2500 polymerization degree is spun by a dry jet-wet spinning or gel spinning method. The resultant coagulated yarn is drawn at a draw ratio of at least 15 and then subjected to acetalization treatment at -10-7% stretching ratio so that the acetalization degree may be 5-15mol%. Thereby the aimed fibers having >=18g/d tensile strength, >=250g/d elastic modulus and >=120 deg.C hot water resistance are obtained.
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公开(公告)号：JPS6335844A
公开(公告)日：1988-02-16
申请号：JP17756886
申请日：1986-07-30
Applicant: TORAY INDUSTRIES
Inventor： MIZUNO MASAHARU , NISHIMOTO YASUNOBU , TANIGUCHI ATSUSHI
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公开(公告)号：JPS61289112A
公开(公告)日：1986-12-19
申请号：JP12440885
申请日：1985-06-10
Applicant: TORAY INDUSTRIES
Inventor： MIZUNO MASAHARU , TANAKA HIROYOSHI , UEDA FUJIO
IPC: D01F6/14
Abstract: PURPOSE:To provide the titled fiber composed of a polyvinyl alcohol polymer having a weight-average molecular weight higher than a specific level, having high tensile strength and suitable as tire cord, seat belt, general rubber reinforcing material, rope, cable, etc. CONSTITUTION:A polyvinyl alcohol polymer having a weight-average molecular weight of >=1X10 , preferably >=1.5X10 is dissolved in a solvent such as dimethyl sulfoxide to obtain a spinning dope. The dope is extruded through a spinning nozzle and coagulated or solidified by cooling. The solidified yarn is desolvated, dried and super-drawn to obtain an ultra-high tenacity polyvinyl alcohol fiber having a tensile strength of >=25/d. Preferably, the fiber has no long-period image in the small-angle X-ray scattering and the peak height of the principal mechanical loss tangent of the fiber is
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