POLYETHYLENE FILMS WITH IMPROVED BUBBLE STABILITY
    13.
    发明申请
    POLYETHYLENE FILMS WITH IMPROVED BUBBLE STABILITY 审中-公开
    具有改善泡沫稳定性的聚乙烯薄膜

    公开(公告)号:US20090035545A1

    公开(公告)日:2009-02-05

    申请号:US11830298

    申请日:2007-07-30

    IPC分类号: B32B25/08 C08K5/14 C08L23/06

    摘要: This invention relates to high density polyethylene blown films having good barrier properties and improved processing characteristics. The method incorporates the use of peroxide which results in improved bubble stability without sacrifice in barrier properties. The polyethylenes have a density greater than about 0.950 g/cc, are relatively narrow in molecular weight distribution MWD (in the range of from about 2.0 to about 6.5), and are of medium molecular weight. In an embodiment, the films also have a rheological breadth parameter, a, that has been reduced by at least about 5%, but not more than 45%, by addition of a peroxide to the polyethylene. The addition of peroxide improves processability without sacrificing strength and barrier properties such as oxygen transmission rate.

    摘要翻译: 本发明涉及具有良好的阻隔性和改善的加工特性的高密度聚乙烯吹塑薄膜。 该方法包括使用过氧化物,其导致改善的气泡稳定性,而不牺牲阻隔性能。 聚乙烯具有大于约0.950g / cc的密度,分子量分布MWD相对较窄(在约2.0至约6.5的范围内),并且具有中等分子量。 在一个实施方案中,膜还具有通过向聚乙烯中加入过氧化物而减少至少约5%但不超过45%的流变宽度参数a。 加入过氧化物可以改善加工性能,而不会牺牲强度和阻隔性能如氧气透过率。

    Under-phone telephone index
    16.
    发明授权
    Under-phone telephone index 失效
    手机电话索引

    公开(公告)号:US4982518A

    公开(公告)日:1991-01-08

    申请号:US258194

    申请日:1988-10-14

    申请人: Gerhard Guenther

    发明人: Gerhard Guenther

    IPC分类号: B42F17/34

    CPC分类号: B42F17/343

    摘要: To accommodate telephones of different base lengths, the under-phone telephone index has housing parts which are telescopingly connected together so that the support area formed by the upper surface can be extended or contracted.

    摘要翻译: 为了容纳不同基座长度的电话机,电话机电话索引具有可伸缩连接在一起的壳体部件,使得由上表面形成的支撑区域可以伸缩。

    Cross-linking resins
    20.
    发明申请
    Cross-linking resins 审中-公开
    交联树脂

    公开(公告)号:US20070232716A1

    公开(公告)日:2007-10-04

    申请号:US11732617

    申请日:2007-04-04

    IPC分类号: C08J3/28

    摘要: This invention relates polyethylene resins that are mixed with peroxides during extrusion to partially cross-link the polymer. The resins are then used to form an article and the article is then irradiated to cause further cross-linking of the polymer. Such resins are useful in blow molding applications, rotomolding, for foamed materials or articles, for extruded membranes, sheets and layers, and for applications where resins are wrapped around other materials or resins prior to irradiation. This cross-linking improves the properties of the resin for certain end-use applications. The polyethylene resins can be obtained from chromium catalyzed polymerizations, Ziegler-Natta catalyzed polymerizations, and metallocene polymerizations.

    摘要翻译: 本发明涉及在挤出期间与过氧化物混合以部分交联聚合物的聚乙烯树脂。 然后将树脂用于形成制品,然后照射制品以引起聚合物的进一步交联。 这种树脂可用于吹塑应用,滚塑,泡沫材料或制品,挤出膜,片材和层,以及用于在照射之前树脂缠绕在其他材料或树脂周围的应用。 这种交联改善了某些最终用途应用中树脂的性能。 聚乙烯树脂可以由铬催化聚合,齐格勒 - 纳塔催化聚合和茂金属聚合获得。