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    POLYAMIDE FILM AND PROCESS FOR ITS MANUFACTURE
    3.
    发明专利
    POLYAMIDE FILM AND PROCESS FOR ITS MANUFACTURE 未知

    公开(公告)号：CA1051624A

    公开(公告)日：1979-04-03

    申请号：CA237601

    申请日：1975-10-10

    Applicant: BASF AG

    Inventor： ZAHN ERWIN ,  CORDES CLAUS ,  ZAHRADNIK FRANZ ,  WEISS HANS-PETER

    IPC: B29C47/88 ,  C08L77/00 ,  B29D7/10

    Abstract: A process for the manufacture of flat film from poly-.epsilon.-caprolactam or its copolymers containing more than 70% of caprolactam units, wherein a melt of polycaprolactam of relative viscosity from 2.4 to 3.3, preferably from 2.5 to 2.8, which contains from 0.001 to 0.01%, of uniformly and finely distributed crystalline magnesium silicates of particle size less than 30 .mu., is extruded through a slit die onto a chill roller and the melt issuing from the slit die is drawn off the chill roller at a speed greater than 30 m/minute, to give a film less than 50 .mu. thick.

    MANUFACTURE OF POLYAMIDE FILM
    6.
    发明专利
    MANUFACTURE OF POLYAMIDE FILM 未知

    公开(公告)号：CA1056085A

    公开(公告)日：1979-06-05

    申请号：CA237603

    申请日：1975-10-10

    Applicant: BASF AG

    Inventor： ZAHN ERWIN ,  CORDES CLAUS ,  SIMON GEORG N ,  WEISS HANS-PETER

    IPC: C08L77/00 ,  C08K5/10 ,  C08L77/06

    Abstract: A film of poly(hexamethylenediamine adipate) (nylon 6,6) having a relative viscosity of from 2.4 to 4.0 and which contains from 0.01 to 2 per cent by weight of an ester of an octanol with p-hydroxybenzoic acid. The nylon 6,6 films obtained by the process of the invention are, surprisingly, very transparent and free from blotches and streaks, and are distinguished by very high uniformity and constancy of film thickness, of optical and mechanical properties, and of surface quality.

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