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公开(公告)号：JP2001123051A
公开(公告)日：2001-05-08
申请号：JP30204299
申请日：1999-10-25
Applicant: TORAY INDUSTRIES
Inventor： CHIKUGI TOSHIHIRO , SASAMOTO FUTOSHI
Abstract: PROBLEM TO BE SOLVED: To provide a polyester composition improved in basic properties such as running character and abrasion resistance, and suitable for optical goods of good transparency. SOLUTION: This composition contains a polyester resin and 0.001-10 wt.% zinc silicate particle represented by the formula: Mx(Zn)y(SiO4).nH2O (wherein M is a metal other than zinc, and when valence of the metal ion is a, x×a+y×2=4, and y>=1.2; and n is a number of 0-2), and has a light transmissivity, on a basis of 100 μm thickness and a particle content of 1 wt.%, of 97.0% or more.
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公开(公告)号：JP2001067645A
公开(公告)日：2001-03-16
申请号：JP2000207920
申请日：2000-07-10
Applicant: TORAY INDUSTRIES
Inventor： CHIKUGI TOSHIHIRO , UEDA TOMOAKI , SUEOKA MASANORI
Abstract: PROBLEM TO BE SOLVED: To provide an aromatic polyamide film for a magnetic recording medium excellent in durability over a long term without damaging original excellent mechanical properties by regulating the total anion concentration when the polyamide film is extracted in hot water for a specified time to be a specified value or less. SOLUTION: Concerning this aromatic polyamide film for a magnetic recording medium, the total anion concentration at the time of hot water extraction for 24 hr is
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公开(公告)号：JPH11181253A
公开(公告)日：1999-07-06
申请号：JP35810697
申请日：1997-12-25
Applicant: TORAY INDUSTRIES
Inventor： MORIMOTO TSUTOMU , SHIMIZU YUZO , CHIKUGI TOSHIHIRO
Abstract: PROBLEM TO BE SOLVED: To produce the subject composition excellent in productivity without substantially causing foreign materials due to a polymerization catalyst by including a specific amount of a metallocene compound therein. SOLUTION: This composition is produced by carrying out transesterification of, e.g. a dialkyl ester as an acid component with a diol using a metallocene metal compound contained in an amount of 1-500 ppm expressed in terms of a metallocene metal element (e.g. titanocene dichloride) as a polymerization catalyst, heating the resultant reactional product under a reduced pressure, removing the excessive diol component and conducting polycondensation. Since the polyester is prepared by using the metallocene compound as the catalyst, an oligomer can be reduced in a short time and sufficient reactivity is obtained with a small amount of the catalyst. Thereby, the productivity is high. Since the composition has no coarse protrusion due to foreign materials, the composition is useful for film applications, especially the films for magnetic tapes.
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公开(公告)号：JPH09220864A
公开(公告)日：1997-08-26
申请号：JP5389096
申请日：1996-02-15
Applicant: TORAY INDUSTRIES
Inventor： CHIKUGI TOSHIHIRO , SUEOKA MASANORI , ITO NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To provide a heat-sensitive transfer recording medium, with which highly fine printing is realized even under severe printing conditions without head damage, by a method wherein aromatic polyamide, which is made soluble in organic solvent and the percentage of moisture absorption of which is suppressed, is employed without impairing its excellent heat resistance, mechanical characteristics and the like. SOLUTION: A heat-sensitive transfer recording layer is provided in order to obtain a heat-sensitive transfer recording medium on one side of an aromatic polyamide film, which is mainly made of para-orienting aromatic polyamide soluble in organic solvent and having 15% or less of the percentage of the substitution of halogen group and nitro group substituting the hydrogen atom on an aromatic nucleus and, at the same time, the Young's modulus in at least one direction of which his 7.8GPa or more and the percentage of moisture absorption of which is 2.5% or less.
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公开(公告)号：JPH09118080A
公开(公告)日：1997-05-06
申请号：JP22119196
申请日：1996-08-22
Applicant: TORAY INDUSTRIES
Inventor： CHIKUGI TOSHIHIRO , ITO NOBUAKI
Abstract: PROBLEM TO BE SOLVED: To improve the printing quality level and processing characteristics by using a base material having a lengthwise Young's modulus, lateral Young's modulus and lateral thermal shrinkage of specific values in a thermal transfer recording material having a thermal transfer layer on one side surface of the material made of an organic polymer. SOLUTION: In the thermal transfer recording material having a thermal transfer layer on one side surface of a base material made of an organic polymer, the base material satisfies the relationships of E MD >=E TD × 1.1 and E TD >=600kg/mm where lengthwise Young's modulus is E MD and lateral Young's modulus is E TD at 20 deg.C and 60% RH, and the lateral thermal shrinkage of the material at 200 deg.C for 10min is 2.0% or less. As such a base material, for example, polyamide, polyimide, polyamideimide, and polyphenylene sulfide are included. Of them, the polyamide and particularly aromatic polyamide is preferable. The content of the ionic impurity contained in the material is 300ppm or less.
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Patent Agency Ranking
公开(公告)号：JPH0931218A
公开(公告)日：1997-02-04
申请号：JP17770295
申请日：1995-07-13
Applicant: TORAY INDUSTRIES
Inventor： SUEOKA MASANORI , CHIKUGI TOSHIHIRO , ITO NOBUAKI
IPC: C08J5/18 , B29C55/12 , B29K77/00 , B29L7/00 , B32B27/34 , C08G69/32 , C08J7/04 , C09D5/23 , C09D7/12 , G11B5/73 , G11B5/704
Abstract: PROBLEM TO BE SOLVED: To prepare an aromatic polyamide film which contains basic structural units respectively shoen by the specific formuals, extremely small in the amount of an reduced extract with chloroform such as oligomers and is excellent in heat resistance and mechanical characteristics and useful as a magnetic recording medium due to its smooth surface. SOLUTION: This aromatic polyamide contains ∞50 mole % of basic structural units of formula I (Ar1 and Ar2 are each formula II or like) and 3-30 mole % of basic structural units of formula III [Ar3 and Ar4 are each formula IV or the like (X and Y are O, CH2 , CO, etc.) and the others are formula II] and the extract with chloroform from the polymer is regulated to
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公开(公告)号：JPH08227518A
公开(公告)日：1996-09-03
申请号：JP28881895
申请日：1995-11-07
Applicant: TORAY INDUSTRIES
Inventor： CHIKUGI TOSHIHIRO , TSUKUDA AKIMITSU , UEDA TOMOAKI
Abstract: PURPOSE: To obtain a magnetic recording medium suitable for use in the open air by regulating characteristics of a substrate film to a prescribed value each and the amt. of metal ions contained in the substrate film to a prescribed value or below. CONSTITUTION: This magnetic recording medium has a magnetic layer on one side of the substrate film made of arom. polyamide or arom. polyimide. The tensile Young's modulus of the substrate film in at least one direction is >=700kg/mm and the rate of dimensional change at 100 deg.C under weighting is
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公开(公告)号：JPH08212538A
公开(公告)日：1996-08-20
申请号：JP27938495
申请日：1995-10-26
Applicant: TORAY INDUSTRIES
Inventor： CHIKUGI TOSHIHIRO , TSUKUDA AKIMITSU , SUEOKA MASANORI , UEDA TOMOAKI
Abstract: PURPOSE: To obtain a magnetic recording medium suitable for use in the open air by using a substrate film made of arom. polyamide and preventing the deterioration of prescribed performance. CONSTITUTION: A magnetic layer is formed on at least one side of an arom. polyamide film contg. >=50mol% bonded units represented by formulae I, II. The product of the coefft. of thermal expansion of the film and the hygroscopic rate is and residue on extraction is 1 and m>0.5. The objective magnetic recording medium suitable for use in the open air is obtd. without deteriorating superior dynamic performance peculiar to the arom. polyamide.
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公开(公告)号：JPH04305079A
公开(公告)日：1992-10-28
申请号：JP6695891
申请日：1991-03-29
Applicant: TORAY INDUSTRIES
Inventor： MATSUNASE TAKEO , TAKADA TAKASHI , CHIKUGI TOSHIHIRO
Abstract: PURPOSE:To obtain a method for solving trouble of safety in work for pulling out a molded plate from an autoclave device which is caused by ammonia generated at the time of curing fire resisting fiber and acrylic fiber in the autoclave and trouble of ammonia odor in the obtained molded plate and furthermore trouble of the same at the time of working the molded plate and of warehouse storage and of handling and use in a closed apartment house. CONSTITUTION:In the case of curing a molded form formed of synthetic fiber contg. nitrile group and hydraulic substance in an autoclave, generated ammonia is removed in a state wherein the molded form is introduced into the autoclave curing device.
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公开(公告)号：JPH01266224A
公开(公告)日：1989-10-24
申请号：JP9063988
申请日：1988-04-13
Applicant: TORAY INDUSTRIES
Inventor： CHIKUGI TOSHIHIRO , MATSUNASE TAKEO , TAKADA TAKASHI
Abstract: PURPOSE:To obtain the title fibers which can be used as a substituent for asbestos in fireman uniform or gasket, because it has high tensile strength, excellent alkali resistance, heat resistance and flame resistance, by sulfurizing acrylic fibers in an atmosphere containing specific sulfur with heat. CONSTITUTION:Acrylic fibers are sulfurized by heating the fibers in a specific sulfur-containing atmosphere whose oxygen content is lower than 1mole% to give the subject fibers. The sulfur-containing atmosphere is preferably composed of 3 or more mole% of sulfur-containing gas, preferably sulfur dioxide and less than 97mole% of an inert gas.
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