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    Biaxially-oriented metallocene-based polypropylene films
    4.
    发明授权
    Biaxially-oriented metallocene-based polypropylene films 失效
    双轴取向金属茂系聚丙烯薄膜

    公开(公告)号：US06579962B1

    公开(公告)日：2003-06-17

    申请号：US09575804

    申请日：2000-05-22

    申请人： William R. Wheat ,  Aiko Hanyu

    发明人： William R. Wheat ,  Aiko Hanyu

    IPC分类号： C08F1006

    CPC分类号： C08J5/18 ,  C08F4/65912 ,  C08F4/65916 ,  C08F10/00 ,  C08F110/06 ,  C08J2323/12 ,  Y10S428/91 ,  Y10S526/943 ,  C08F4/65927 ,  C08F2500/12 ,  C08F2500/14 ,  C08F2500/20 ,  C08F2500/26

    摘要： A process for the production of biaxially-oriented polypropylene film involving the provision of a polypropylene polymer produced by the polymerization of propylene in the presence of a metallocene catalyst characterized by a bridged racemic bis(indenyl) ligand substituted at the proximal position. The polypropylene contains 0.5 to 2% 2,1 insertions and has an isotacticity of at least 96% meso pentads and at least 99% meso diads. The film is formed by stressing the polymer produced from a slot die in the machine direction at a stretch ratio of about 5 or 6 and in the transverse direction at a stretch ratio of about 8 or 9 to produce a biaxially-oriented film having a non-uniform melt temperature of a peak value of less than 160° C. The polypropylene polymer has meltflow index of less than 5 grams per 10 minutes and has an average molecular weight within the range of 100,000-400,000 grams per mole. The film, when configured having a thickness of 18 microns, is characterized by a machine direction secant modulus of at least 1400 MPa, a transverse direction secant modulus of at least 2200 MPa, a kinetic film-to-film co-efficient of friction of no more than 0.5, and permeabilities to water and oxygen of no more than 2.6 g/m2/d and 2400 c3/m2/d, respectively. The film is further characterized by shrinkage factors of at least 8% in a transverse dimension and at least 16% in a transverse direction when heated to a temperature of at least 140° C.

    摘要翻译： 一种生产双轴取向聚丙烯薄膜的方法，涉及提供通过丙烯在茂金属催化剂存在下聚合制备的聚丙烯聚合物，其特征在于在近端位置被取代的桥连外消旋双（茚基）配体。 聚丙烯含有0.5至2％的2,1插入，并且具有至少96％的内消旋五单元和至少99％的内消旋二聚体的全同立构规整度。 通过在纵向上以约5或6的拉伸比并且在横向上以约8或9的拉伸比强加从槽模头产生的聚合物来形成膜，以制造具有非线性的双轴取向膜， - 峰值小于160℃的均匀熔体温度。聚丙烯聚合物的熔体流动指数小于5克/ 10分钟，其平均分子量在100,000-400,000克/摩尔的范围内。 当薄膜的厚度为18微米时，其特征在于机器方向割线模数为至少1400MPa，横向割线模量为至少2200MPa，动摩擦膜的摩擦系数为 不超过0.5，渗透率分别不超过2.6g / m2 / d和2400c3 / m2 / d。 该薄膜进一步的特征在于当加热到至少140℃的温度时，在横向尺寸上至少8％的收缩因子和在横向上至少16％

    Compositions for improved orientation processing
    5.
    发明授权
    Compositions for improved orientation processing 失效
    用于改进定向处理的组合

    公开(公告)号：US06207093B1

    公开(公告)日：2001-03-27

    申请号：US09065719

    申请日：1998-04-24

    申请人： Aiko Hanyu ,  William R. Wheat

    发明人： Aiko Hanyu ,  William R. Wheat

    IPC分类号： B29C4700

    CPC分类号： B29C55/005 ,  B29C55/143 ,  B29K2023/12 ,  Y10S428/91

    摘要： The present invention relates to improved processability of polyolefin films through the addition to the basic isotactic polypropylene (iPP) polymer of a syndiotactic polypropylene (sPP) in an amount within the range of about 2 to 10 weight percent and of a resin or rosin modifier in an amount within the range of 1 to 30 weight percent. Preferably, the composition could contain syndiotactic propylene in an amount within the range of about 2 to 5 weight percent. Preferably, about 3 weight percent of syndiotactic propylene is present in the polyolefin composition. The resin or rosin modifier could, preferably, be present in an amount within the range of 5 to 10 weight percent. Preferably, the composition should contain about 10 weight percent of the modifier. The present invention encompasses both the resulting polyolefin films and the process for producing such films. The improved processability of the film includes fewer webs breaks and drawability at higher line speeds, resulting in fewer shut downs of the processing line and a decrease in manufacturing time. These improvements are measured in terms of variable machine direction orientation draw ratios and transverse direction orientation oven temperatures.

    摘要翻译： 本发明涉及通过加入量为约2至10重量％范围内的间同立构聚丙烯（sPP）的基本全同立构聚丙烯（iPP）聚合物和树脂或松香改性剂的改进的方法来改进聚烯烃膜的加工性能 在1至30重量％范围内的量。 优选地，组合物可以含有在约2至5重量％范围内的量的间同立构丙烯。 优选地，约3重量％的间同立构丙烯存在于聚烯烃组合物中。 树脂或松香改性剂优选以5至10重量％的量存在。 优选地，组合物应包含约10重量％的改性剂。 本发明包括得到的聚烯烃膜和制备这种膜的方法。 膜的改进的加工性在较高的线速度下具有较少的断裂和拉伸性，导致加工线的停机更少，并且制造时间的减少。 这些改进是根据可变的机器方向取向拉伸比和横向取向烘箱温度来测量的。

    Metal bond strength in polyolefin films
    8.
    发明授权
    Metal bond strength in polyolefin films 失效

    公开(公告)号：US5958566A

    公开(公告)日：1999-09-28

    申请号：US954325

    申请日：1997-10-17

    申请人： William R. Wheat ,  Aiko Hanyu

    发明人： William R. Wheat ,  Aiko Hanyu

    IPC分类号： C23C14/20 ,  B32B7/02

    CPC分类号： C23C14/20 ,  Y10T428/1352 ,  Y10T428/24967 ,  Y10T428/25 ,  Y10T428/31678 ,  Y10T428/31692

    摘要： The present invention relates to the improvement of metal bonding strength in polypropylene films through the addition of ethylene in a mini-random ethylene-propylene copolymer in an amount of no more than about 1 weight percent, more preferably no more than about 0.7 weight percent, and most preferably between about 0.3 weight percent and about 0.5 weight percent, or even amounts between about 0.05 weight percent and about 0.2 weight percent. The invention allows the improvement of metal bond strength in metallizable films. The invention encompasses both the resulting films with enhanced metal bond strength and the process for producing such films. In the preferred embodiment, the proposed mini-random copolymer is formed into a film layer used in place of a propylene homopolymer layer, providing improved bonding properties over a simple polypropylene homopolymer, while maintaining at acceptable levels the physical and optical characteristics of a film layer made from a propylene homopolymer, such as stiffness.

    Heat-seal strength in polyolefin films
    10.
    发明授权
    Heat-seal strength in polyolefin films 有权
    聚烯烃薄膜的热封强度

    公开(公告)号：US06803094B1

    公开(公告)日：2004-10-12

    申请号：US09413384

    申请日：1999-10-06

    申请人： William R. Wheat ,  Aiko Hanyu

    发明人： William R. Wheat ,  Aiko Hanyu

    IPC分类号： B32B700

    CPC分类号： B32B27/08 ,  B32B27/32 ,  B32B2038/0028 ,  B32B2307/518 ,  B32B2323/04 ,  B32B2323/10 ,  Y10S428/91 ,  Y10T428/24942 ,  Y10T428/24967 ,  Y10T428/2826 ,  Y10T428/31587 ,  Y10T428/31855 ,  Y10T428/31909 ,  Y10T428/31913

    摘要： The present invention is for the improvement of inter-layer bonding strength in polypropylene films through the addition of ethylene as a mini-random copolymer in an amount of no more than about 1 weight percent, more preferably no more than about 0.7 weight percent, and most preferably between about 0.3 weight percent to about 0.5 weight percent or even amounts less than about 0.2 weight percent. The invention allows the improvement of inter-layer bond strength in multi-layer films resulting specifically in improved heat seal strength. The invention encompasses both the resulting films with enhanced heat seal strength and the process for producing such films. In the preferred embodiment, the proposed mini-random copolymer is formed into a film layer used in place of a propylene homopolymer layer, providing improved bonding properties over a film formed of polypropylene homopolymer, while maintaining at acceptable levels the physical and optical characteristics of a film layer made from a propylene homopolymer, such as stiffness.

    摘要翻译： 本发明是为了通过加入乙烯作为微型无规共聚物，其量不超过约1重量％，更优选不超过约0.7重量％，提高聚丙烯薄膜的层间粘合强度，以及 最优选约0.3重量％至约0.5重量％或甚至少于约0.2重量％。 本发明允许提高多层膜中的层间结合强度，特别是提高热封强度。 本发明包括具有增强的热封强度的所得膜和用于制备这种膜的方法。 在优选的实施方案中，所提出的微型无规共聚物形成为用于代替丙烯均聚物层的膜层，提供了由聚丙烯均聚物形成的膜提供的改善的粘合性能，同时保持在可接受的水平下的物理和光学特性 由丙烯均聚物制成的薄膜层，如刚度。