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    PRODUCTION OF HAZE-FREE POLYESTER
    22.
    发明专利
    PRODUCTION OF HAZE-FREE POLYESTER 失效

    公开(公告)号：JPS5819326A

    公开(公告)日：1983-02-04

    申请号：JP11639681

    申请日：1981-07-27

    Applicant: TORAY INDUSTRIES

    Inventor： UEDA TOMOAKI ,  MORITA TOORU ,  OKASAKA HIDESADA

    IPC: C08G63/00 ,  C08G63/78 ,  C08G63/82

    Abstract: PURPOSE:To obtain a high-softening point, transparent polyester, by polycondensing a dicarboxylic acid with a glycol in the presence of a glycol-soluble Mn, Mg or Ca compound and an alkali metal compound, the last two being used at a specified mol ratio. CONSTITUTION:The purpose polyester is obtained by mixing and reacting (A) a terephthalic acid-based dicarboxylic acid component or its esterifiable derivative, (B) an ethylene glycol-based glycol component, (C) about 0.015-1mol%, based on formed polyester, glycol-soluble metallic compound selected from Mn, Mg and Ca compounds (e.g., manganese chloride, manganese acetate), (D) a glycol-soluble alkali metal compound (e.g., lithium chloride, sodium ethylate) in an amount satisfying the formula, wherein M is the total number of mols of component C and A is that of component C and (E) a necessary polymerization catalyst.

    THERMOPLASTIC RESIN FILM
    27.
    发明专利
    THERMOPLASTIC RESIN FILM 失效

    公开(公告)号：JPH01238657A

    公开(公告)日：1989-09-22

    申请号：JP6699388

    申请日：1988-03-18

    Applicant: TORAY INDUSTRIES

    Inventor： OKASAKA HIDESADA ,  HATTORI TETSUYA ,  YOSHIZUMI NOBUO

    IPC: B32B27/18 ,  C08J5/18 ,  G03C1/72 ,  G03C1/73 ,  G03F1/00

    Abstract: PURPOSE:To improve the anti-solvent properties and heat resistance and the dimensional accuracy of a process negative film by using a film capable of changing the permeability of the film at an infra-red region to more than the specified value by irradiating energy rays to the film, for the title film. CONSTITUTION:The film is composed of the thermoplastic resin film contg. a compd. (A) having absorption at a near infra-red region, and the photopermeability of the compd. at the max. absorption wavelength of the near infra-red region can be changed to >=30% by irradiating the energy rays such as an electron ray, etc. And, the compd. (A) is composed of a dithiol metal complex shown by the formula, etc., and the thermoplastic resin is composed of polyethylene terephthalate, etc. In the formula, M is Ni or Pd, etc., R is phenyl or alkyl group, etc. And, the film may comprise a composite film composed of a film contg. the compd. (A) and a usual thermoplastic resin film.

    NON-SHEATHED CAPACITOR
    28.
    发明专利
    NON-SHEATHED CAPACITOR 失效

    公开(公告)号：JPH01236611A

    公开(公告)日：1989-09-21

    申请号：JP4381788

    申请日：1988-02-25

    Applicant: TORAY INDUSTRIES

    Inventor： NISHIDA HARUMASA ,  YOSHIZUMI NOBUO ,  OKASAKA HIDESADA

    IPC: H01G4/20

    Abstract: PURPOSE:To make it possible to obtain the title capacitor having excellent winding adaptability, high dielectric strength and a small decreasing rate of electrostatic capacitance by a method wherein the surface roughness Ra and the heat-shrinkage rate of the composite film constituting a dielectric are specifically prescribed. CONSTITUTION:A dielectric is composed of a triple-layer composite film consisting of a polyester inner layer and a thermoadhesive copolymer polyester layer laminated on both surfaces of the inner layer. At this point, the surface roughness Ra of the composite film is 0.010-0.300mum, the heat-shrinkage rate in longitudinal direction is 5-25%, the heat-shrinkage rate in widthwise direction is 2-20%, and the relation of said two heat-shrinkage rates is longitudinal- direction heat-shrinkage rate >= widthwise-direction heat-shrinkage rate. As a result, the electric characteristics such as the winding adaptability, the dielectric strength, the electrostatic capacitance and the like of the title capacitor can be improved.

    BIAXIALLY ORIENTED POLYESTER FILM
    29.
    发明专利
    BIAXIALLY ORIENTED POLYESTER FILM 失效

    公开(公告)号：JPH01229040A

    公开(公告)日：1989-09-12

    申请号：JP5453188

    申请日：1988-03-07

    Applicant: TORAY INDUSTRIES

    Inventor： HIRAMOTO YUMIKO ,  ABE KOICHI ,  OKASAKA HIDESADA

    IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18

    Abstract: PURPOSE:To obtain the title film suitable for magnetic tape, electrical insulation and condenser with an extremely small amount of low-molecular weight compound precipitated by copolymerizing a dicarboxylic acid component with a diol component having a specific molar volume. CONSTITUTION:(A) 1-20mol% diol component (e. g. 1,4-cyclohexanedimethanol) having >=70cm /mol, preferably /mol molar volume of repeating structure unit and (B) a diol component such as ethylene glycol are polymerized with (C) a dicarboxylic acid component such as terephthalic acid to give pellets having >=0.75 intrinsic viscosity. The pellets are fed to a melt extruder, extruded into a sheet, and biaxially oriented to give the aimed film having >=0.70 intrinsic viscosity, 1.3600-1.3849g/cm density and >=800kg/mm sum of Young's moduli of longitudinal direction and width direction.

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