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    White Opaque Films With Improved Tensile And Barrier Properties
    7.
    发明申请
    White Opaque Films With Improved Tensile And Barrier Properties 审中-公开
    白色不透明薄膜具有改进的拉伸和阻隔性能

    公开(公告)号：US20090081474A1

    公开(公告)日：2009-03-26

    申请号：US12190454

    申请日：2008-08-12

    申请人： Jay K. Keung

    发明人： Jay K. Keung

    IPC分类号： B32B27/32 ,  B29C47/00

    CPC分类号： B32B27/32 ,  B32B27/08 ,  B32B2307/518 ,  B32B2307/7246 ,  Y10T428/31913

    摘要： Provided are multi-layered white opaque films composed of at least two skin layers, at least one tie layer, and at least one core layer. The at least two skin layers are each composed of one or more polyolefins. The at least one tie layer is composed of one or more hydrocarbon resins. The at least one core layer is composed of a blend of one or more polyolefins and one or more cavitating agents. The multi-layered white opaque films described herein exhibit improvements in light transmission, stiffness, and water vapor transmission rate. Moreover, these films were found to exhibit improved cavitation as tested by optical gauge and light transmission.

    摘要翻译： 提供了由至少两个表皮层，至少一个粘结层和至少一个芯层组成的多层白色不透明膜。 所述至少两个表皮层各自由一种或多种聚烯烃组成。 所述至少一个粘结层由一种或多种烃树脂组成。 至少一个核心层由一种或多种聚烯烃和一种或多种空化剂的共混物组成。 本文所述的多层白色不透明膜表现出光透射性，刚度和水蒸汽透过率的改善。 此外，这些膜被发现显示出通过光学测量和光透射测试的改进的空化。

    Multi-layer heat-sealable polypropylene films
    9.
    发明授权
    Multi-layer heat-sealable polypropylene films 失效
    多层可热封聚丙烯薄膜

    公开(公告)号：US4956232A

    公开(公告)日：1990-09-11

    申请号：US290131

    申请日：1988-12-27

    申请人： Ricardo Balloni ,  Kevin M. Donovan ,  Jay K. Keung

    发明人： Ricardo Balloni ,  Kevin M. Donovan ,  Jay K. Keung

    IPC分类号： B32B27/18 ,  B32B27/32 ,  C09J7/02

    CPC分类号： C09J7/0242 ,  C09J7/0296 ,  C09J2201/162 ,  Y10T428/2826 ,  Y10T428/2848 ,  Y10T428/31573 ,  Y10T428/31913 ,  Y10T428/31935

    摘要： Multi-layer, heat-sealable polypropylene films are disclosed which possess good coefficient of friction, and thus good machinability, and which are also capable of forming good bonds with water based adhesives. The film structures consist essentially of(A) an outer heat sealable layer coextensively adherent to the upper surface of core layer (B), said outer layer (A) being formed from a polymer composition (a) consisting essentially of heat sealable resin compounded with one or more slip additives which are incompatible with polypropylene,(B) a core layer derived from a polymer composition (b) consisting essentially of an isotactic polypropylene compounded with one or more slip additives which are incompatible with polypropylene, and(C) an outer layer coextensively adherent to the lower surface of core layer (B), said outer layer (C) being formed from a polymer composition consisting essentially of isotactic polypropylene in the substantial absence of slip additives;wherein the total amount of slip additive in said film structure is effective to provide the outer surface of outer layer (A) with a coefficient of friction sufficient for high speed heat sealing packaging operations but insufficient to cause substantial hazing of said structure.

    摘要翻译： 公开了多层可热封的聚丙烯薄膜，其具有良好的摩擦系数，因此具有良好的机械加工性，并且还能够与水性粘合剂形成良好的粘结。 膜结构基本上由（A）与芯层（B）的上表面共同附着的外部可热封层组成，所述外层（A）由聚合物组合物（a）形成，聚合物组合物（a）主要由热可密封树脂 一种或多种与聚丙烯不相容的滑爽添加剂，（B）衍生自聚合物组合物（b）的芯层，其基本上由与聚丙烯不相容的一种或多种滑爽添加剂组合的全同立构聚丙烯组成，（C）外部 所述外层（C）由基本上由基本上不含滑爽添加剂的全同立构聚丙烯组成的聚合物组合物形成; 其中所述膜结构中的滑爽添加剂的总量有效地为外层（A）的外表面提供足以用于高速热封包装操作的摩擦系数，但不足以引起所述结构的实质性的混浊。