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    11.
    发明专利
    失效

    公开(公告)号：JPH024060B2

    公开(公告)日：1990-01-25

    申请号：JP3380182

    申请日：1982-03-05

    Applicant: TORAY INDUSTRIES

    Inventor： MINAMI TOMOYUKI ,  TANAKA KAZUHIRO ,  NISHIOKA TAKESHI

    IPC: B32B7/02 ,  B29C55/00 ,  B29C55/06 ,  B29C55/12 ,  B29C55/14 ,  B29C55/16 ,  B29K67/00 ,  B29L7/00 ,  B32B27/36 ,  C08L67/02 ,  G11B5/64 ,  G11B5/73

    Abstract: PURPOSE:To make a magnetic recording medium withstand long-time recording and severe service conditions by using a biaxially oriented polyethylene terephthalate film having a specified F-5 value, a specified rate of thermal shrinkage and a specified coefft. of amorphous orientation as the base. CONSTITUTION:Polyethylene terephthalate is melted, extruded, and biaxially oriented by stretching to form a film having >=3,500kg/cm total F-5 value in the longitudinal and lateral directions, >=1,800kg/cm F-5 value in the longitudinal direction, >=1,500kg/cm F-5 value in the lateral direction,

    CROSSLINKED VINYL CHLORIDE RESIN FOAM EXCELLENT IN HEAT RESISTANCE
    13.
    发明专利
    CROSSLINKED VINYL CHLORIDE RESIN FOAM EXCELLENT IN HEAT RESISTANCE 失效

    公开(公告)号：JPS6236435A

    公开(公告)日：1987-02-17

    申请号：JP17575185

    申请日：1985-08-12

    Applicant: TORAY INDUSTRIES

    Inventor： NISHIOKA TAKESHI ,  KAMIJIYUTSUKOKU SHIGEO ,  KAWANO HIROSHI

    IPC: C08J9/06 ,  C08J9/00

    Abstract: PURPOSE:The titled foam free of blending out and excellent in heat resistance, flexibility and high-frequency sealability, consisting essentially of a vinyl chloride resin and a PE copolymer at a specified blending ratio. CONSTITUTION:A blend polymer consisting essentially of 0.25-2.40pts.wt. vinyl chloride resin (A) having a vinyl chloride component content of 65-100wt% and an average degree of polymerization of 300-3,000 and 1pt.wt. PE copolymer (B) comprising at lest one mono- or di-basic aliphatic unsaturated carboxylic acids (derivatives) as the comonomer, such as an ethylene/alkyl acrylate, m.p. (Tm) of 86-102 deg.C, comprising ethylene and 10-25wt% comonomer such as an alkyl acrylate, is mixed with, optionally, a low-density PE (C) of a m.p. . To this mixture a heat stabilizer, a heat- decomposable blowing agent (e.g., azodi-carbonamide), etc., are added and the resulting mixture is molded and crosslinked to a gel rate of 15-60%. The obtained crosslinked molding is heated to decompose the blowing agent violently, to obtain the titled foam whose physical properties do no change with the lapse of time.

    CROSSLINKED POLYETHYLENE RESIN FOAM HAVING EXCELLENT FORMABILITY
    14.
    发明专利
    CROSSLINKED POLYETHYLENE RESIN FOAM HAVING EXCELLENT FORMABILITY 失效

    公开(公告)号：JPS6234929A

    公开(公告)日：1987-02-14

    申请号：JP17294885

    申请日：1985-08-06

    Applicant: TORAY INDUSTRIES

    Inventor： NISHIOKA TAKESHI ,  KAMIJIYUTSUKOKU SHIGEO ,  KAWANO HIROSHI

    IPC: C08J9/06 ,  C08J9/10 ,  C08L23/00 ,  C08L23/08

    Abstract: PURPOSE:To obtain a crosslinked foam containing a specific polyethylene copolymer, a low-density polyethylene and a straight-chain polyethylene, having excellent vacuum-formability and formable by vacuum-forming without causing the surface-roughening. CONSTITUTION:The objective foamed material is composed of a blended polymer containing (A) a polyethylene copolymer containing one or more compounds selected from monobasic or dibasic aliphatic unsaturated carboxylic acid and its derivative as a copolymerized component, (B) a low-density polyethylene and (C) a straight-chain polyethylene as essential components. The blending ratio of (B+C)/A is 12-19 (by weight), the gel fraction is 15-45% and the draw ratio (K) satisfies the formula K>=2d+0.40 (d is apparent density g/cm ).

    CROSSLINKED POLYETHYLENE RESIN FOAM OF HIGH EXPANSION RATIO
    15.
    发明专利
    CROSSLINKED POLYETHYLENE RESIN FOAM OF HIGH EXPANSION RATIO 失效

    公开(公告)号：JPS61238832A

    公开(公告)日：1986-10-24

    申请号：JP8037085

    申请日：1985-04-17

    Applicant: TORAY INDUSTRIES

    Inventor： NISHIOKA TAKESHI ,  KAMISUTEISHI SHIGEO ,  KAWANO HIROSHI

    IPC: C08J9/06 ,  C08J9/04

    Abstract: PURPOSE:The titled foam excellent in flexibility and heat resistance, comprising a specified random ethylene/propylene copolymer, a specified low-density PE and a linear PE. CONSTITUTION:A polymer blend is obtained by blending a random ethylene/ propylene copolymer (A) of a propylene content of 15-30wt%, a m.p. of 100-118 deg.C and a crystallization temperature of 85-100 deg.C with 90-10pts.wt. low-density PE (B) of a m.p. and 10-90pts. wt. linear PE (C) of MFR of 0.1-500g/10min, a density of 0.915-0.945g/cm and a m.p. of 115-135 deg.C at a (B+C)/A ratio of 0.10-5.70. This polymer is mixed with a heat-decomposable blowing agent and formed into a sheet. This sheet is expanded to obtain a crosslinked PE resin foam of an area intensity ratio (R) determined from a C-NMR spectrum and represented by the equation of 3.0-74.0 and a flexibility index number (N)

    HIGH-PERFORMANCE CROSSLINKED POLYETHYLENE RESIN FOAM
    16.
    发明专利
    HIGH-PERFORMANCE CROSSLINKED POLYETHYLENE RESIN FOAM 失效

    公开(公告)号：JPS61238830A

    公开(公告)日：1986-10-24

    申请号：JP8036885

    申请日：1985-04-17

    Applicant: TORAY INDUSTRIES

    Inventor： NISHIOKA TAKESHI ,  KAMISUTEISHI SHIGEO ,  KAWANO HIROSHI

    IPC: C08J9/06 ,  C08J9/04 ,  C08J9/10 ,  C08L23/00 ,  C08L23/16

    Abstract: PURPOSE:The titled foam excellent in vacuum formability and low in uneven crosslinking and cell collapse, comprising a polymer blend comprising a specified random ethylene/propylene copolymer and a specified low-density PE. CONSTITUTION:A heat-decomposable blowing agent is added to a polymer blend comprising a random ethylene/propylene copolymer (A) of a propylene content of 15-30wt%, a m.p. of 100-118 deg.C and a crystallization temperature of 85-100 deg.C, a low-density PE (B) of a m.p. and, optionally, a linear PE (C) of a m.. of 115-135 deg.C, MI of 1-50g/10min and a density of 0.915-0.945g/cm , and the obtained mixture is formed into a sheet. This sheet is expanded by heating to obtain a high-performance crosslinked PE resin foam having an area intensity ratio (R) determined from a C-NMR spectrum and represented by the equation of 20-300, a gel fraction of 15-45%, a draw ratio (K) in the range of K>=2d+0.40 (wherein d is an apparent density, g/cm ).

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