Coextruded, biaxially oriented multilayer film
    13.
    发明授权
    Coextruded, biaxially oriented multilayer film 失效
    共挤出双轴取向多层膜

    公开(公告)号:US4975329A

    公开(公告)日:1990-12-04

    申请号:US274334

    申请日:1988-11-21

    Abstract: A coextruded, biaxailly oriented multilayer film comprises a base layer comprising an extremely pure raw material and outer layer. It is suitable for use as an electrically insulating film, as a dielectric in an electrical capacitor, and has improved dielectrical properties for this purpose. The base layer and the outer layer or layers contain propylene polymer on one or both sides and stabilizers for propylene polymers. The raw material for the base layer has an idealized thermal oxidation temperature in the range of 260.degree. to 300.degree. C., preferably in the range 260.degree. to 280.degree. C., and the raw material for the outer layer or layers has an idealized thermal oxidation temperature in the region of 240.degree. to 300.degree. C., preferably in the range 240.degree. to 270.degree. C. The multilayer film as a whole has an idealized thermal oxidation temperature in the range 250.degree. to 290.degree. C., in paticular in the range 250.degree. to 275.degree. C. The content of organic neutralizing agents, in particular calcium stearate, in the raw materials is less than or equal to 100 ppm.

    Abstract translation: 共挤出的双轴取向多层膜包括包含极纯原料和外层的基层。 它适合用作电绝缘膜,作为电容器中的电介质,并且为此目的具有改进的介电特性。 基层和外层或层在一侧或两侧含有丙烯聚合物和用于丙烯聚合物的稳定剂。 用于基层的原料具有理想的热氧化温度在260℃至300℃的范围内,优选在260℃至280℃的范围内,而外层的原料具有理想的 热氧化温度在240℃至300℃的范围内,优选在240℃至270℃的范围内。多层膜整体具有理想的热氧化温度在250°至290℃的范围内, 在250〜275℃的范围内,原料中的有机中和剂,特别是硬脂酸钙的含量小于或等于100ppm。

    Non-sealable polypropylene multi-layer film
    14.
    发明授权
    Non-sealable polypropylene multi-layer film 失效
    不可密封聚丙烯多层膜

    公开(公告)号:US4912091A

    公开(公告)日:1990-03-27

    申请号:US111791

    申请日:1987-10-23

    Abstract: An on-sealable, biaxially oriented, transparent multi-layer film is disclosed comprising a base layer, two intermediate layers separated from each other by this base layer and two covering layers, one covering layer each being arranged on top of an intermediate layer, the intermediate layers containing a combination of additives comprising a long-chain aliphatic amine and an inorganic pigment and the covering layers containing, in each case, a polydialkylsiloxane. A process for the production of the multi-layer film and its use are also disclosed.

    Abstract translation: 公开了一种可密封的双向取向的透明多层膜,其包括基层,由该基层彼此分离的两个中间层和两个覆盖层,每个覆盖层布置在中间层的顶部, 含有包含长链脂族胺和无机颜料的添加剂组合的中间层和在各种情况下包含聚二烷基硅氧烷的覆盖层。 还公开了生产多层膜的方法及其用途。

    Sealable, transparent polyolefinic multilayer film
    15.
    发明授权
    Sealable, transparent polyolefinic multilayer film 失效
    可密封,透明聚烯烃多层膜

    公开(公告)号:US4720420A

    公开(公告)日:1988-01-19

    申请号:US801808

    申请日:1985-11-26

    Abstract: A sealable, transparent polyolefinic multilayer film composed of a polypropylene base layer, a non-sealable surface layer, and a sealable surface layer, and process therefor. The sealable surface layer has a low minimum sealing temperature and is made from a copolymer of propylene and ethylene or butene-1 units and/or a terpolymer of ethylene, propylene and butene-1 units. The non-sealable layer is a combination of a propylene homopolymer, a slip agent, and an anti-blocking agent. The process includes coextruding the three layers, biaxially stretching the coextruded film, and subjecting the non-sealable layer to a corona-discharge treatment.

    Abstract translation: 由聚丙烯基层,不可密封表面层和密封性表面层构成的可密封的透明聚烯烃多层膜及其工艺。 可密封的表面层具有低的最小密封温度,并由丙烯和乙烯或丁烯-1单元和/或乙烯,丙烯和丁烯-1单元的三元共聚物制成。 不可密封层是丙烯均聚物,增滑剂和防粘连剂的组合。 该方法包括共挤出三层,双轴拉伸共挤出膜,以及对不可密封层进行电晕放电处理。

    Multi-layer opaque low density film
    16.
    发明授权
    Multi-layer opaque low density film 失效
    多层不透明低密度膜

    公开(公告)号:US4663219A

    公开(公告)日:1987-05-05

    申请号:US780442

    申请日:1985-09-26

    Abstract: A coextruded multi-layer opaque film which has been biaxially oriented by stretching in the longitudinal direction and transverse direction at selected temperatures and with selected stretch ratios, and a method for producing the film. The film has a base layer of polypropylene or a copolymer thereof, and fillers. Its density is 0.4 to 0.6 g/cm.sup.3, the amount of filler, based on the mixture of polypropylene and filler, is 16 to 30% by weight, and the particles of the filler employed have a mean size of 2 to 5 .mu.m. Because of its reduced tendency to recover after folding, the film is particularly suitable for packaging purposes. One or more surface layers can be applied on either or both sides of the base layer.

    Abstract translation: 一种共挤出的多层不透明膜,其通过在选定温度和选定的拉伸比下沿纵向和横向拉伸而双轴取向,以及该膜的制造方法。 该膜具有聚丙烯或其共聚物的基层和填料。 其密度为0.4〜0.6g / cm 3,基于聚丙烯和填料的混合物的填料量为16〜30重量%,所使用的填料的粒子的平均粒径为2〜5μm。 由于其折叠后恢复的趋势减少,因此该膜特别适用于包装目的。 可以在基层的一侧或两侧施加一个或多个表面层。

    Sealable, opaque polyolefinic multilayer film and process therefor
    17.
    发明授权
    Sealable, opaque polyolefinic multilayer film and process therefor 失效
    可密封的,不透明的聚烯烃多层膜及其工艺

    公开(公告)号:US4652489A

    公开(公告)日:1987-03-24

    申请号:US804890

    申请日:1985-12-05

    Abstract: A sealable, opaque polyolefinic multilayer film composed of a polypropylene base layer, a non-sealable surface layer, and a sealable surface layer, and process therefor. The sealable surface layer has a low minimum sealing temperature and is made from a copolymer of propylene and ethylene or butene-1 units and/or a terpolymer of ethylene, propylene and butene-1 units. The non-sealable layer is a combination of a propylene homopolymer and a slip agent. The base layer contains an additive which is incompatible with polypropylene. The process includes stretching of the film, and during the stretching step, the polymer matrix is torn open around the additive particles to form vacuoles which give the base layer a degree of opacity.

    Abstract translation: 由聚丙烯基层,不可密封表面层和可密封表面层构成的可密封的不透明聚烯烃多层膜及其工艺。 可密封的表面层具有低的最小密封温度,并由丙烯和乙烯或丁烯-1单元和/或乙烯,丙烯和丁烯-1单元的三元共聚物制成。 不可密封层是丙烯均聚物和滑爽剂的组合。 基层含有与聚丙烯不相容的添加剂。 该方法包括拉伸膜,并且在拉伸步骤期间,聚合物基体围绕添加剂颗粒被撕开以形成空泡,这使得基层具有一定程度的不透明度。

Patent Agency Ranking