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    Oriented film composed of thermoplastic polymer with particulate hollow bodies a process for its production and its use
    22.
    发明专利
    Oriented film composed of thermoplastic polymer with particulate hollow bodies a process for its production and its use 未知

    公开(公告)号：ZA956443B

    公开(公告)日：1996-02-05

    申请号：ZA956443

    申请日：1995-08-02

    Applicant: HOECHST AG

    Inventor： SCHRECK MICHAEL ,  AHLERS MICHAEL ,  OSAN FRANK

    IPC: B32B5/18 ,  B01J13/04 ,  B29C47/00 ,  B29C55/02 ,  B29K23/00 ,  B29K105/04 ,  B29K105/16 ,  B29L9/00 ,  B32B27/00 ,  B32B27/08 ,  B32B27/20 ,  B32B27/32 ,  C08J5/18 ,  C08J9/00 ,  C08L23/02 ,  C08L23/10 ,  C08L23/12 ,  C08J ,  C08L ,  B32B ,  B29C

    Abstract: An oriented thermoplastic polymer film comprising only (or contg.) a vacuole-contg. layer is such that this layer contains hollow particles of a polymer which is incompatible with the thermoplastic polymer, the incompatible polymer pref. being syndiotactic polystyrene, polyphenylene sulphide, polyetherketone, polyamide, PET, PBT, polyaramide, polyimide, halogenated polymer, an amorphous or partially crystalline cycloolefin polymer or a metathesis polymer. Claimed prodn. is by extrusion, orientation etc., with the extrusion temp. being below the Tg of the incompatible polymer. Also claimed as novel are: (a) mixts. of thermoplastic polymers with 2-70 (esp. 3-40) wt.% incompatible polymer hollow particles; (b) hollow particles of cycloolefin copolymers; and (c) prodn. of (b) by spray drying a soln., emulsion or dispersion. Pref. the film has an ASTM D 1003-77 light transmission of below 95(esp. 5-80)% and density up to 1.7 (esp. 0.4-1.5) g/cm . The thermoplastic polymer is polypropylene. The hollow particles form up to 40 (esp. 1-30) wt.% of the vacuole-contg. layer and are spherical or have 1-20 concave surface segments. In particular, the particles are such that the hollow vol. is very small and at least 90% of them have a max. dia. of 0.2-20 (esp. 0.3-7) mu m. The vacuole contg. layer can also contain TiO2 as pigment.

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