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    BIAXIALLY STRETCHED LAMINATED FILM
    21.
    发明专利
    BIAXIALLY STRETCHED LAMINATED FILM 失效

    公开(公告)号：JPH0584820A

    公开(公告)日：1993-04-06

    申请号：JP27180791

    申请日：1991-09-25

    Applicant: TORAY INDUSTRIES

    Inventor： OKAZAKI IWAO ,  FUKUYAMA TAKEO ,  ABE KOICHI

    IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  B29L9/00 ,  B32B27/20 ,  B32B27/36 ,  C08J5/18 ,  G11B5/73 ,  G11B5/733

    Abstract: PURPOSE:To display excellent abrasion resistance at high speed and electromagnetic conversion characteristics by a method wherein specified three particle components are included in the surface of at least one side of thin outermost layer part so as to function particles A mainly as the reinforcement of the surface of ground, particles B as the formation of the surface projections having the desired height and particles C as the roughening of the surface. CONSTITUTION:The biaxially stretched laminated film concerned has the lamination structure consisting of at least three layers. In one side of the outermost layer part of the film, three kinds of particles A, B and C are included. The particle A is one selected from the group consisting of zirconia, chain silica and alumina and its primary particle diameter is 1-100nm. The particle B is calcite-type calcium carbonate, which has the primary particle diameter of 0.1-2mum and the content of which is 0.005-2wt.%. The particle C is one selected from the group consisting of colloidal silica, crosslink-type organic particle and vaterite-type calcium carbonate and its primary particle diameter is 0.1-2mum and its content is 0.005-2wt.% and the relationship between the particle diameter (d) of the particle B and the thickness (t) of the layer part, in which the particle B is included, satisfies the inequality: 0.5d

    BIAXIALLY ORIENTED POLYESTER FILM
    22.
    发明专利
    BIAXIALLY ORIENTED POLYESTER FILM 失效

    公开(公告)号：JPH02185533A

    公开(公告)日：1990-07-19

    申请号：JP413189

    申请日：1989-01-11

    Applicant: TORAY INDUSTRIES

    Inventor： NISHINO SATOSHI ,  FUKUYAMA TAKEO ,  ABE KOICHI

    IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  C08J5/18 ,  C08K3/22 ,  C08L67/00 ,  C08L67/02

    Abstract: PURPOSE:To improve scratch and scraping resistances by incorporating an alumina particle with a specified average degree of agglomeration in a biaxially oriented polyester film. CONSTITUTION:A polyester (e.g. polyethylene terephthalate) is compounded with 0.05-5wt.% alumina particle with a mean prim. particle diameter of 5-200nm and one or more crystal form selected from beta, gamma and delta types and, if necessary, an inert particle with a mean particle diameter of 0.1-1.5mum and a crystallization acceleration factor of 15 deg.C or lower. The compounded mixture is melt-extruded, cooled and solidified to obtain an undrawn film. Then, this film is drawn 4 to 5-fold in two or three stages in the longitudinal direction at 100-130 deg.C and then 3 to 4-fold in the transverse direction at 80-120 deg.C. If necessary, it is heat- treated at a const. length at 180-230 deg.C for 0.5-30sec to obtain the title film with an average degree of agglomeration of the alumina particles of 5-100.

    READILY CUTTABLE POLYESTER FILM
    23.
    发明专利
    READILY CUTTABLE POLYESTER FILM 失效

    公开(公告)号：JPH01229042A

    公开(公告)日：1989-09-12

    申请号：JP5465588

    申请日：1988-03-08

    Applicant: TORAY INDUSTRIES

    Inventor： YOSHIZUMI NOBUO ,  FUKUYAMA TAKEO ,  UEDA TOMOAKI

    IPC: C08J5/18 ,  C08G63/68 ,  C08G63/688

    Abstract: PURPOSE:To obtain the title film useful as a base material for packaging film, etc., having specific tear propagation resistance, excellent toughness, heat resistance, etc., by copolymerizing plural dicarboxylic acids such as metallic sulfonate group-containing aromatic carboxylic acid, etc. CONSTITUTION:(A) Terephthalic acid is copolymerized with (B) 3-12mol% (based on the component A) of metallic sulfonate group-containing aromatic dicarboxylic acid (e.g., 5-sodiumsulfoisophthalic acid), (C) 3-18 mol% (based on the component A) aromatic dicarboxylic acid except the component A (e.g., isophthalic acid) and/or 4-20C aliphatic dicarboxylic acid (e.g., succinic acid) and (D) ethylene glycol, made into a sheet by an extruder and biaxially drawn to give the aimed film having preferably 5-80mum thickness and

    THERMOPLASTIC RESIN SHEET FOR MOLDING AND MOLDED BODY
    28.
    发明专利
    THERMOPLASTIC RESIN SHEET FOR MOLDING AND MOLDED BODY 失效

    公开(公告)号：JPH06255053A

    公开(公告)日：1994-09-13

    申请号：JP4799593

    申请日：1993-03-09

    Applicant: TORAY INDUSTRIES

    Inventor： HIRAOKA TOSHIHIKO ,  FUKUYAMA TAKEO ,  TSUNASHIMA KENJI

    IPC: B29C51/14 ,  B29K23/00 ,  B29L9/00 ,  B32B27/00 ,  B32B27/32

    Abstract: PURPOSE:To obtain a thermoplastic resin sheet that has low adhesiveness in thermoforming and thus corresponds to various molding forms with a wide range of molding temperatures, a good uniformity in the molded item obtained, and a fine sliding property in the molded item, and is not susceptible to flaws at least, one of the layers being amorphous polyolefine in a thermoplastic resin sheet having a plurality of layers. CONSTITUTION:One layer of a thermoplastic sheet having at least two layers is made of amorphous polyolefine of norbornene resin. When the amorphous polyolefine layer is A, and the thermoplastic resin layer to be laminated is made B, a two-layered structure of A/B is available, and a three-layered structure of B/A/B is also available, and when the thermoplastic resin layer except A, B is made C, a multi-layered structure of B/A/C, and C/B/A/B/C are still available, and the amorphous polyolefine layer itself can exist by two layers or more therein. The molding temperature of a molded body for thermoforming a thermoplastic resin sheet is a glass transition temperature or higher of the amorphous polyolefine, or a melting point or glass transition temperature or lower of the thermoplastic resin to be laminated.

    BIAXIALLY ORIENTATED LAMINATED FILM
    29.
    发明专利
    BIAXIALLY ORIENTATED LAMINATED FILM 失效

    公开(公告)号：JPH0516226A

    公开(公告)日：1993-01-26

    申请号：JP27344391

    申请日：1991-09-26

    Applicant: TORAY INDUSTRIES

    Inventor： OKAZAKI IWAO ,  FUKUYAMA TAKEO ,  ABE KOICHI

    IPC: B29C55/12 ,  B29K67/00 ,  B29L7/00 ,  B29L9/00 ,  B32B27/00 ,  B32B27/20 ,  B32B27/36 ,  C09D5/23 ,  G11B5/73

    Abstract: PURPOSE:To form a surface shape of a film, which is effective to electromagnetic converting characteristics, and make the surface shape of the outermost layer optimum in accordance with the use of the film by constituting a lamination structure having four or more layers, providing a cushioning layer between a central layer and the outermost surface layer and forming projections, which are uniform and hard to be scraped, on the surface of the central layer by particle having a predetermined content and a predetermined diameter. CONSTITUTION:On each face side of a C layer i.e., a central layer, a B layer is laminated, and an A layer is laminated on the outer surface side of at least one of the B layers. In this case, it is preferable that the A, B and C layers consist of a polyester film layer according to their electromagnetic converting characteristics and mechanical characteristics. For the thickness and particle content of the layers, the B layer whose particle content is not more than 2wt.%, and whose thickness is not less than 0.2mum, is formed on both the faces of the C layer whose thickness is not less than 0.1mum. The A layer is formed on at least one of the outer faces of the B layers, and the particle content of the A layer is not more than 20wt.% and the thickness thereof is 0.005 to 3mum. The ratio d/t of the diameter (d) of the particles in the A layer to the thickness (t) of the A layer is preferably 3 or below.

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