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    BIAXIALLY HIGHLY ORIENTED POLYPROPYLENE FILM, PROCESS FOR ITS PRODUCTION AND USE THEREOF
    1.
    发明专利
    BIAXIALLY HIGHLY ORIENTED POLYPROPYLENE FILM, PROCESS FOR ITS PRODUCTION AND USE THEREOF 未知

    公开(公告)号：CA2149376C

    公开(公告)日：2006-10-03

    申请号：CA2149376

    申请日：1995-05-15

    Applicant: HOECHST AG

    Inventor： PEIFFER HERBERT ,  MURSCHALL URSULA ,  BUSCH DETLEF ,  LOHMANN HARALD

    IPC: B29C55/12 ,  B29C55/00 ,  B32B27/32 ,  C08F8/00 ,  C08J5/18 ,  C08L23/12

    Abstract: The disclosed biaxially oriented propylene polymer film contains, in it s single ply (or, if it is a multi-ply film, in its base ply) a low molecular weight resin, and the film has improved stretchability and other desirable physical properties, even though the propylene polymer of the sole or base ply is preferably a homopolymer. The n-heptane-insoluble fraction of the film has a chain isotax y index, measured by means of 13C-NMR spectroscopy, of at least 85 to 94%. The sole or base ply contains less than 10% by weight of resin. The film is stretched in such a way that the product of tensile strength in the longitudinal and transverse direction is greater than 50,000 (N/mm2)2. The film is made by, among other steps, carrying out the orientation in the longitudinal and transverse directions such that the product of the longitudinal stretching ratio and th e transverse stretching ratio is .gtoreq. 60.

    3.
    发明专利
    未知

    公开(公告)号：BR9602574A

    公开(公告)日：1998-10-06

    申请号：BR9602574

    申请日：1996-05-31

    Applicant: HOECHST AG

    Inventor： WINTER ANDREAS ,  KOCHEM KARL-HEINZ ,  PEIFFER HERBERT ,  BUSCH DETLEF ,  SCHLOEGL GUNTER ,  DRIES THOMAS

    IPC: B29C47/06 ,  B29C55/12 ,  B29K7/00 ,  B29K23/00 ,  B32B27/18 ,  B32B27/32 ,  C08F8/00 ,  C08F10/06 ,  C08J5/18 ,  C08L23/10

    Abstract: Biaxially oriented polypropylene (PP) film comprises base ply (or plies) contg. PP having the following properties: (i) a mean isotactic block length of the PP mol. between 2 structural chain defects of, as statistical average, greater than 40; (ii) chain isotactic index for n-heptane-insol. fraction of PP of at least 95%, measured by means of C-NMR spectroscopy; (iii) ratio of wt. average Mw to the number average Mn of the mol. wt. distribution of less than 4; (iv) an n-heptane-soluble fraction of PP of less than 1%; and (v) film shrinkage in the longitudinal direction and in the transverse direction of less than 5%. Also claimed are: (a) a process for the prodn. of the above PP film; (b) the use of the PP film as a packaging film ; (c) the use of the PP film as a laminating film.

    4.
    发明专利
    未知

    公开(公告)号：BR9602569A

    公开(公告)日：1998-10-06

    申请号：BR9602569

    申请日：1996-05-31

    Applicant: HOECHST AG

    Inventor： DRIES THOMAS ,  WINTER ANDREAS ,  BUSCH DETLEF ,  SCHLOEGL GUNTER ,  PEIFFER HERBERT

    IPC: B29C47/06 ,  B29C55/12 ,  B29K23/00 ,  B29L7/00 ,  B32B27/18 ,  B32B27/32 ,  C08F8/00 ,  C08F10/06 ,  C08J5/18 ,  C08L23/10

    Abstract: A biaxially-oriented polypropylene film has at least one base layer contg. polypropylene with the following properties: (i) a statistical ave. for the isotactic block length between 2 chain breaks of at least 40; (ii) an n-heptane insols. fraction having a chain-isotacticity index (measured by 13C NMR spectroscopy) of at least 95 (esp. at least 97)%; (iii) an Mw/Mn ratio below 4, esp. below 2.7; (iv) an n-heptane soluble fraction below 1%; and (v) a water vapour transmission no more than 24/micron thickness Äg/m .dÜ and an O2 transmission no more than 34,000/meter thickness Äcm /(m .d.bar)Ü. Claimed prodn. is by multi-layer melt extrusion, followed by cooling on a roller and orienting at ratios 3-9:1 lengthwise and 4-12:1 transversely. Pref. the film is 4-100 microns thick,being solely of the above polypropylene layer(s) or having its thickness 40-60% made up of such layer(s). Any other layers (on one or both sides of the polypropylene base layer(s) are of polyolefins which can be heat-sealable. The various layers can also contain neutralising agents, stabilisers, antistats and/or anti-blocking agents. Appropriate polypropylene for the base layer(s) is obtd. using metallocene catalysts.

    PROCEDIMIENTO PARA LA FABRICACION DE LAMINAS DE POLIPROPILENO Y SU UTILIZACION.
    5.
    发明专利
    PROCEDIMIENTO PARA LA FABRICACION DE LAMINAS DE POLIPROPILENO Y SU UTILIZACION. 未知

    公开(公告)号：MX9601682A

    公开(公告)日：1997-07-31

    申请号：MX9601682

    申请日：1996-05-02

    Applicant: HOECHST AG

    Inventor： PEIFFER HERBERT ,  SCHLOEGL GUNTER ,  KOCHEM KARL-HEINZ ,  BUSCH DETLEF ,  SCHMIDT ROBERT

    IPC: B29C47/06 ,  B29C47/04 ,  B29C48/305 ,  B29C55/02 ,  B29C55/12 ,  B29C69/00 ,  B29K23/00 ,  B29L7/00 ,  B29L9/00 ,  B29C49/52

    Abstract: Se describe un procedimiento para la fabricacion de láminas de polipropileno orientadas biaxialmente, que comprenden por lo menos una capa, en el cual un polímero de propileno B es calentado en un extrusor y la masa fundida del polímero de propileno B es extruida a través de una boquilla de rendija aplanada, y la masa fundida que sale a través de la boquilla de rendija aplanada es retirada sobre uno o varios rodillos y es consolidada para formar la lámina previa, y está lámina previa estirada en los sentidos longitudinal y transversal, calentándose y fundiéndose en un segundo extrusor un polímero de propileno, o una mezcla de polímeros de propileno, A, y conduciéndose la masa fundida del polímero de propileno, o de la mezcla de polímeros de propileno, A, junto a ambos lados de la masa fundida del polímero de propileno, B, de manera tal que ambas masas fundidas sean extruidas en comun y simultáneamente a través de la boquilla de rendija aplanada y el polímero de propileno, o la mezcla de polímeros de propileno, A, forma la zona de borde de la lámina durante el proceso de fabricacion, y las zonas de borde a base del polímero de propileno, o de la mezcla de polímeros de propileno, A, son cortadas después de los estiramientos en los sentidos longitudinal y transversal de la lámina.

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