利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

5 条记录 (耗时 0.017 秒)

    Polyethylene blends with improved Vicat softening point
    3.
    发明授权
    Polyethylene blends with improved Vicat softening point 失效
    具有改进维卡软化点的聚乙烯共混物

    公开(公告)号：US07439306B2

    公开(公告)日：2008-10-21

    申请号：US10995572

    申请日：2004-11-23

    申请人： Donna Sue Davis

    发明人： Donna Sue Davis

    IPC分类号： C08L23/00 ,  C08L23/04

    CPC分类号： C08L23/06 ,  C08L23/0815 ,  C08L2205/02 ,  C08L2314/06 ,  Y10T428/31913 ,  Y10T428/31938 ,  C08L2666/06

    摘要： A method of selecting polyethylene components for a polyethylene composition having an improved Vicat softening point comprising blending at least a first polyethylene having a first density and a second polyethylene having a second density to form the polyethylene composition, wherein the first density is greater than the second density, and determining a first Vicat softening point (V1) of the composition measured, and calculating a second Vicat softening point (V2) of the composition using the formula V2=[Σn1{W1(Vicat softening point of the first polyethylene)+W2(Vicat softening point of the second polyethylene) . . . Wn(Vicat softening point of the nth polyethylene)}], wherein W1 is the weight fraction of the first polyethylene, W2 is the weight fraction of the second polyethylene and Wn is the weight fraction of the nth polyethylene, n ranges from 2 to 10 and W1+W2 . . . +Wn=1.0; comparing V1 and V2; selecting the polyethylene components such that V1 is less than V2 for the polyethylene composition.

    摘要翻译： 选择具有改进的维卡软化点的聚乙烯组合物的聚乙烯组分的方法，包括共混至少第一密度的第一聚乙烯和具有第二密度的第二聚乙烯以形成聚乙烯组合物，其中第一密度大于第二密度 密度，并测定所测定的组合物的第一维卡软化点（V 1 N 1），并使用下式计算组合物的第二维卡软化点（V 2 N 2） ？in-line-formula description =“In-line Formulas”end =“lead”？> V 2 1 W 1（第一聚乙烯的维卡软化点）+ W 2（第二聚乙烯的维卡软化点）。 。 。 （第n个聚乙烯的维卡软化点）}]，<？在线公式描述=“在线公式”end =“tail”？>其中W 1 < / SUB>是第一聚乙烯的重量分数，W 2是第二聚乙烯的重量分数，W n n是第n个聚乙烯的重量分数，n范围 2至10和W 1 + W 2 2。 。 。 + W = 1.0; 比较V＆lt; 1＆gt;和V 2＆lt; 2＆gt;; 为聚乙烯组合物选择聚乙烯组分使V 1 H 2小于V 2 N 2。

    Polyethylene articles with improved resistance to water vapor transmission
    4.
    发明授权
    Polyethylene articles with improved resistance to water vapor transmission 失效
    具有改善的耐水蒸汽传输性能的聚乙烯制品

    公开(公告)号：US06419966B1

    公开(公告)日：2002-07-16

    申请号：US08362042

    申请日：1994-12-22

    申请人： Donna Sue Davis

    发明人： Donna Sue Davis

    IPC分类号： B65D8500

    CPC分类号： C08J5/18 ,  B32B27/32 ,  C08F110/02 ,  C08J2323/04 ,  C08F2500/07 ,  C08F2500/12

    摘要： Films, containers made of high density polyethylene, and articles made therefrom exhibit, for a given density, improved resistance to water vapor transmission. The high density polyethylenes are produced in a metallocene-catalyzed production process. Alternatively, for equivalent water vapor transmission rates (WVTR) an article formed in accordance with the invention will exhibit improved physical properties, such as dart drop impact, more balanced tear properties and improved machine direction (MD) tear properties. Additionally, these high density polyethylenes show a low level of extractables and an excellent organoleptic profile.

    摘要翻译： 由高密度聚乙烯制成的薄膜，容器以及由此制成的制品对于给定的密度显示出改善的耐水蒸汽传输性。 茂金属催化的生产过程中生产高密度聚乙烯。 或者，对于等效的水蒸汽透过率（WVTR），根据本发明形成的制品将表现出改进的物理性能，例如落镖撞击，更平衡的撕裂性能和改善的机器方向（MD）撕裂性能。 此外，这些高密度聚乙烯显示出低水平的可提取物和优异的感官特性。