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    Multilayer polyolefinic film structures having improved heat seal characteristics
    1.
    发明授权
    Multilayer polyolefinic film structures having improved heat seal characteristics 失效
    具有改善的热封特性的多层聚烯烃薄膜结构

    公开(公告)号：US5089321A

    公开(公告)日：1992-02-18

    申请号：US639648

    申请日：1991-01-10

    申请人： Pak-Wing S. Chum ,  Kaelyn C. Koch

    发明人： Pak-Wing S. Chum ,  Kaelyn C. Koch

    IPC分类号： B32B27/32

    CPC分类号： B32B27/32 ,  Y10S428/91 ,  Y10T428/24992 ,  Y10T428/2826 ,  Y10T428/31746 ,  Y10T428/31913 ,  Y10T428/3192

    摘要： Multilayer thermoplastic film structures comprising at least one heat-sealable outer layer (A) and at least one core layer (B) are disclosed. Layer (A) has improved heat sealability after irradiation (e.g. electron beam). Layer (B) has improved shrinkage after irradiation. Layer (A) is a linear polyethylene having a melt index from about 2 to about 20 g/10 minutes, a density from about 0.88 to about 0.92 g/cc, a molecular weight distribution (I.sub.10 /I.sub.2) from about 5 to about 8, a fraction of the polyethylene having a degree of branching less than or equal to 2 methyls/1000 carbons of not more than 15% by weight and a fraction of the polyethylene having a degree of branching greater than or equal to 25 methyls/1000 carbons of not more than 25% by weight of the polymer. Layer (B) is a linear polyethylene having a melt index from about 0.05 to about 5 g/10 minutes, a density from about 0.88 to about 0.94 g/cc and a molecular weight distribution (I.sub.10 /I.sub.2) from about 8 to about 30.

    摘要翻译： 公开了包括至少一个可热密封的外层（A）和至少一个芯层（B）的多层热塑性薄膜结构。 层（A）在照射后具有改善的热封性（例如电子束）。 层（B）在照射后具有改善的收缩率。 层（A）是具有约2至约20g / 10分钟的熔体指数，约0.88至约0.92g / cc的密度，约5至约8的分子量分布（I 10 / I 2） ，具有小于或等于2个甲基/ 1000个碳的支化度的不超过15重量％的聚乙烯的一部分和具有大于或等于25个甲基/ 1000个碳的支化度的聚乙烯的分数 不超过聚合物的25重量％。 层（B）是具有约0.05至约5g / 10分钟的熔体指数，约0.88至约0.94g / cc的密度和约8至约30的分子量分布（I 10 / I 2）的线性聚乙烯 。

    Cast stretch film of interpolymer compositions
    3.
    发明授权
    Cast stretch film of interpolymer compositions 有权
    互聚物组合物的拉伸膜

    公开(公告)号：US06812289B2

    公开(公告)日：2004-11-02

    申请号：US10200814

    申请日：2002-07-22

    申请人： Jozef J. I. Van Dun ,  Jacquelyn A. deGroot ,  Pradeep Jain ,  Kalyan Sehanobish ,  Pak-Wing S. Chum

    发明人： Jozef J. I. Van Dun ,  Jacquelyn A. deGroot ,  Pradeep Jain ,  Kalyan Sehanobish ,  Pak-Wing S. Chum

    IPC分类号： C08L2300

    CPC分类号： B32B27/32 ,  Y10S526/943

    摘要： This invention relates to cast films prepared from interpolymer compositions comprising; (A) a substantially linear ethylene/&agr;-olefin interpolymer present in the composition in an amount of from about 10 to about 100% by weight based on the combined weight of Components A and B; and (B) a heterogeneous interpolymer present in the composition in an amount of from about 0 to about 90% by weight based on the combined weight of Components A and B; and wherein said interpolymer composition has an I10/I2 value of −1.2−1.3* log(I2) The interpolymer compositions are useful in cast stretch film manufacture with the resulting cast films having an excellent balance of strength and processability.

    摘要翻译： 本发明涉及由互聚物组合物制备的流延膜，其包含：（A）组合物中基本上线性的乙烯/α-烯烃互聚物，其量为约10至约100重量％，基于组分A和 B; 和（B）基于组分A和B的组合重量，组合物中存在的异构互聚物的量为约0至约90重量％; 并且其中所述互聚物组合物的I 10 / I 2值<约10.0，并且其特征在于具有100rad / s的粘度和满足以下关系之一的弛豫时间（τ）;或所述互聚物组合物可用于铸塑拉伸膜 制造出具有优异的强度和加工性能的所得流延薄膜。

    Blends of .alpha.-olefin/vinyl aromatic monomer and/or aliphatic or cycloaliphatic vinyl or vinylidene monomer interpolymers
    5.
    发明授权
    Blends of .alpha.-olefin/vinyl aromatic monomer and/or aliphatic or cycloaliphatic vinyl or vinylidene monomer interpolymers 失效
    α-烯烃/乙烯基芳族单体和/或脂族或脂环族乙烯基或亚乙烯基单体互聚物的共混物

    公开(公告)号：US6166145A

    公开(公告)日：2000-12-26

    申请号：US121461

    申请日：1998-07-23

    申请人： Martin J. Guest ,  Yunwa W. Cheung ,  John J. Gathers ,  Pak-Wing S. Chum

    发明人： Martin J. Guest ,  Yunwa W. Cheung ,  John J. Gathers ,  Pak-Wing S. Chum

    IPC分类号： C08J5/18 ,  C08J9/00 ,  C08L23/00 ,  C08L23/04 ,  C08L23/08 ,  C08L25/02 ,  C08L25/04 ,  C08L25/08 ,  C09J123/02 ,  C09J125/02 ,  C09J145/00 ,  C09K3/10 ,  D01F6/44 ,  C08L45/00

    CPC分类号： C08L23/04 ,  C08L23/0815 ,  C08L23/0838 ,  C08L25/02 ,  C08L2205/02 ,  Y10T428/1397 ,  Y10T428/2913 ,  C08L2666/04

    摘要： Blends of polymeric materials comprising a plurality of substantially random interpolymers each interpolymer comprising:(1) from about 1 to about 65 mole percent of polymer units derived from either(a) at least one vinyl aromatic monomer or(b) at least one aliphatic or cycloaliphatic vinyl or vinylidene monomer, or(c) a combination of at least one vinyl aromatic monomer and at least one aliphatic or cycloaliphatic vinyl or vinylidene monomer, and(2) from about 35 to about 99 mole percent of polymer units derived from ethylene and/or at least one aliphatic alpha olefin having from 3 to 20 carbon atoms; and wherein:the amount of polymer units derived from vinyl aromatic monomer and/or aliphatic or cycloaliphatic vinyl or vinylidene monomer in any interpolymer component differs from that amount in another interpolymer component by at least 0.5 mole percent.These blends of interpolymer components give enhanced properties or processability when compared to the individual polymers comprising the blend.

    摘要翻译： 包含多个基本无规共聚体的聚合材料的共混物，每个共聚体包含：（1）约1至约65摩尔％的衍生自（a）至少一种乙烯基芳族单体的聚合物单元或（b）至少一种脂族或 脂环族乙烯基或亚乙烯基单体，或（c）至少一种乙烯基芳族单体和至少一种脂族或脂环族乙烯基或亚乙烯基单体的组合，和（2）约35至约99摩尔％的衍生自乙烯和 /或至少一种具有3至20个碳原子的脂族α-烯烃; 并且其中：衍生自乙烯基芳族单体和/或任何互聚物组分中的脂族或脂环族乙烯基或亚乙烯基单体的聚合物单元的量与另一互聚物组分中的量的量不同至少为0.5摩尔％。 当与包含共混物的各种聚合物相比时，互聚物组分的这些共混物提供了增强的性能或加工性能。

    Cross-linked ethylenic polymer foam structures and process for making
    7.
    发明授权
    Cross-linked ethylenic polymer foam structures and process for making 失效
    交联乙烯聚合物泡沫结构及其制备方法

    公开(公告)号：US5288762A

    公开(公告)日：1994-02-22

    申请号：US54329

    申请日：1993-04-28

    申请人： Chung P. Park ,  Pak-Wing S. Chum ,  George W. Knight

    发明人： Chung P. Park ,  Pak-Wing S. Chum ,  George W. Knight

    IPC分类号： C08J9/10 ,  C08J9/14

    CPC分类号： C08J9/14 ,  C08J9/10 ,  C08J2323/16 ,  Y10S526/943

    摘要： Disclosed is a cross-linked ethylenic polymer foam structure of an ethylenic polymer material of a cross-linked, substantially linear ethylenic polymer. The substantially linear ethylenic polymer having in an uncross-linked state has: a) a melt flow ratio, I.sub.10 /I.sub.2, .gtoreq.5.63; b) a molecular weight distribution, M.sub.w /M.sub.n, defined by the equation: M.sub.w /M.sub.n .gtoreq.(I.sub.10 /I.sub.2)- 4.63; and c) a critical shear rate at onset of surface melt fracture of at least 50 percent greater than the critical shear rate at the onset of surface melt fracture of a linear ethylenic polymer having about the same I.sub.2 and M.sub.w /M.sub.n. Further disclosed is a process for making the above foam structure.

    摘要翻译： 公开了交联的，基本上线性的烯属聚合物的乙烯类聚合物材料的交联乙烯类聚合物泡沫结构。 具有未交联状态的基本上线性的乙烯类聚合物具有：a）熔体流动比，I10 / I2> = 5.63; b）由以下等式定义的分子量分布Mw / Mn：Mw / Mn> =（I10 / I2）-4.63; 和c）在具有大约相同的I2和Mw / Mn的线性烯属聚合物的表面熔融断裂开始时，表面熔融断裂开始时的临界剪切速率比临界剪切速率大至少50％。 进一步公开了制造上述泡沫结构的方法。