Method and apparatus for testing the curing characteristics of plastics
    26.
    发明授权
    Method and apparatus for testing the curing characteristics of plastics 失效
    测试塑料固化特性的方法和装置

    公开(公告)号:US4956994A

    公开(公告)日:1990-09-18

    申请号:US335951

    申请日:1989-04-10

    Applicant: Ching-Tai Lue

    Inventor: Ching-Tai Lue

    CPC classification number: G01N3/42 G01N2203/0092 G01N2203/0098

    Abstract: A plunger of a known mass is held in a guide sleeve of a test device at a predetermined height over the sample of settable plastic material being tested. The plunger is gently released onto the sample without impact to apply a static force thereon similar to a "handgrip" pressure applied on a molded part during handling. The static pressure is applied on the sample released at selected times and places after reactive components of the sample are mixed for reaction to effect a series of indentations on the sample whose depths are measured and plotted as points on a depth versus time graph to define a cure curve of the sample. Curing rate is determined from the initial slope of the curve. Cure completion is determined where the curve levels off. A measure of the likelihood of handling damage is established by the portion of the indentations after a given time period.

    Abstract translation: 已知质量的柱塞被保持在测试装置的引导套筒中,在被测试的可固化塑料材料的样品上的预定高度处。 将柱塞轻轻地释放到样品上而不产生冲击,以在其上施加静力,类似于在处理期间施加在模制部件上的“手柄”压力。 将静态压力施加到在选定的时间和样品上释放的样品上,将样品的反应性组分混合后进行反应,以对测量深度的样品产生一系列凹痕,并将其绘制为深度与时间图上的点,以定义 固化曲线的样品。 固化速率由曲线的初始斜率确定。 治愈完成是在曲线平稳的地方确定的。 处理损害的可能性的度量是由给定时间段之后的缩进部分确定的。

    Polymer blends and films made therefrom
    27.
    发明授权
    Polymer blends and films made therefrom 有权
    聚合物共混物和由其制成的薄膜

    公开(公告)号:US08722804B2

    公开(公告)日:2014-05-13

    申请号:US13635931

    申请日:2011-03-22

    Abstract: Polymer blends and films made therefrom are provided. The polymer blend can include a first polyethylene having a density of less than about 0.940 g/cm3, a melt index (I2) greater than 0.75 g/10 min, and a melt index ratio (I21/I2) of less than 30. The polymer blend can also include a second polyethylene having a density of less than about 0.940 g/cm, a melt index (I2) of less than 1 g/10 min, a melt index ratio (I21/I2) greater than 30, and a molecular weight distribution (Mw/Mn) of less than 4.5.

    Abstract translation: 提供聚合物共混物和由其制成的薄膜。 聚合物共混物可以包括密度小于约0.940g / cm 3,熔体指数(I2)大于0.75g / 10min,熔体指数比(I21 / I2)小于30的第一聚乙烯。 聚合物共混物还可以包括密度小于约0.940g / cm 2,熔体指数(I 2)小于1g / 10min,熔体指数比(I21 / I2)大于30的第二聚乙烯,和 分子量分布(Mw / Mn)小于4.5。

    Oxygen tailoring of polyethylene resins
    28.
    发明授权
    Oxygen tailoring of polyethylene resins 有权
    聚乙烯树脂氧气定制

    公开(公告)号:US07892466B2

    公开(公告)日:2011-02-22

    申请号:US11176046

    申请日:2005-07-07

    Abstract: Methods of tailoring polyethylenes are contemplated utilizing 0.5 to 70 volume percent oxygen containing gases. The tailoring occurs in a melt-conveying zone of a mixer/extruder, and not in the feed or melting zones of a mixer/extruder. The effect of tailoring is to decrease the haze and/or increase the gloss of blown films made from the tailored polyethylenes compared to similar polyethylenes that are extruded/mixed in the substantial absence of oxygen or oxygen containing gases.

    Abstract translation: 考虑使用0.5至70体积%含氧气体来调节聚乙烯的方法。 剪切发生在混合器/挤出机的熔体输送区域中,而不是在混合器/挤出机的进料或熔融区域中。 与基本上不含氧气或含氧气体挤出/混合的类似聚乙烯相比,定制的效果是降低由定制的聚乙烯制成的吹塑薄膜的雾度和/或增加的光泽度。

    Easy processing linear low density polyethylene
    30.
    发明授权
    Easy processing linear low density polyethylene 有权
    易加工线性低密度聚乙烯

    公开(公告)号:US06476171B1

    公开(公告)日:2002-11-05

    申请号:US09677756

    申请日:2000-10-03

    Abstract: A polymer of ethylene and at least one alpha olefin having at least 5, carbon atoms obtainable by a continuous gas phase polymerization using supported catalyst of an activated molecularly discrete catalyst such as a metallocene in the substantial absence of an aluminum alkyl based scavenger which polymer has a Melt Index (MI) as herein defined of from 0.1 to 15; a Compositional Distribution Breadth Index (CDBI) as defined herein of at least 70%, a density of from 0.910 to 0.930 g/ml; a Haze value as herein defined of less than 20%; a Melt Index ratio (MIR) as herein defined of from 35 to 80; an averaged Modulus (M) as herein defined of from 20 000 to 60 000 psi (pounds per square inch) and a relation between M and the Dart Impact Strength in g/mil (DIS) complying with the formula: DIS≧0.8×[100+e(11.71-0.000268×M+2.183×10−9×M2)].

    Abstract translation: 乙烯和至少一种具有至少5个碳原子的α-烯烃的聚合物,其可通过使用活性分子催化剂如金属茂的负载型催化剂在连续气相聚合中获得,基本上不含烷基铝基清除剂 本文定义的熔体指数(MI)为0.1至15; 如本文所定义的组成分布宽度指数(CDBI)至少为70%,密度为0.910至0.930g / ml; 本文定义的雾度值小于20%; 本文定义的熔体指数比(MIR)为35至80; 如本文所定义的平均模量(M)为20 000至60 000psi(磅/平方英寸),以及M和以g / mil(DIS)计的撞击强度之间的关系:符合下列公式:

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