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    • 8. 发明授权
    • Uniaxially shrinkable biaxially oriented polypropylene film
    • 单轴收缩双轴取向聚丙烯薄膜
    • US06303233B1
    • 2001-10-16
    • US09055479
    • 1998-04-06
    • Moris AmonSalvatore J. Pellingra, Jr.Tien-Kuei Su
    • Moris AmonSalvatore J. Pellingra, Jr.Tien-Kuei Su
    • B32B2732
    • B32B27/32Y10S428/91Y10T428/1328Y10T428/31913
    • A uniaxially heat-shrinkable, biaxially oriented, multilayer film having a polypropylene-containing core layer containing at least 70 wt. % of the multilayer film and at least one polyolefin-containing skin layer adjacent the core layer is prepared by biaxially orienting a coextrudate and thereafter orienting the coextrudate by stretching 10 to 40% in the machine direction. The core layer contains isotactic polypropylene, a modifier which reduces the crystallinity of the polypropylene-containing core layer and a nucleating agent. Such modifiers include atactic polypropylene, syndiotactic polypropylene, ethylene-propylene copolymer, propylene-butene-1 copolymer, ethylene-propylene-butene-1 terpolymer, and linear low density polyethylene. The nucleating agent improves long term dimensional stability. The skin layer can be high density polyethylene on both sides or high density polyethylene on one side and isotactic polypropylene on the other side.
    • 一种单轴热收缩双轴取向多层膜,其具有含聚丙烯的芯层,其含有至少70wt。 通过双轴取向共挤出物,然后通过在机器方向上拉伸10〜40%来使共挤出物定向,来制备邻近芯层的多层膜和至少一种含聚烯烃的表层。 芯层含有全同立构聚丙烯,其是降低含聚丙烯核心层和成核剂的结晶度的改性剂。 这种改性剂包括无规立构聚丙烯,间同立构聚丙烯,乙烯 - 丙烯共聚物,丙烯 - 丁烯-1共聚物,乙烯 - 丙烯 - 丁烯-1三元共聚物和线性低密度聚乙烯。 成核剂提高长期的尺寸稳定性。 表皮层可以是两侧的高密度聚乙烯,另一侧是高密度聚乙烯,另一面是全同立构聚丙烯。
    • 9. 发明授权
    • Opaque polymeric films and processes for making same
    • 不透明聚合物膜及其制造方法
    • US06183856B2
    • 2001-02-06
    • US08686287
    • 1996-07-25
    • Moris Amon
    • Moris Amon
    • B32B320
    • B32B3/26B32B27/08B32B27/32B32B2307/41B32B2307/514Y10T428/249987Y10T428/249993
    • A process for making an opaque, oriented polymeric film structure and the resultant film structures. The process comprises preparing a melt containing a crystallizable polymeric matrix material at a temperature of at least above the melting point of the polymeric matrix material and thereafter forming the melt into a sheet containing molten polymeric matrix material. The sheet containing molten material is then cooled to form a sheet containing amorphous polymeric matrix material and crystallites of the polymeric matrix material. The sheet while containing the amorphous polymeric matrix material is then formed into a film by stretching the sheet in at least one direction so as to form voids adjacent to at least some of the crystallites and thereby impart opacity to the film. Film structures made by the above process have a plurality of voids, at least some of the voids not containing a void-initiating particle and at least some of the voids being interconnected with an adjacent void in the polymeric matrix material, the number of voids being sufficient to impart a significant degree of opacity in the film structure.
    • 制造不透明的取向聚合物膜结构的方法以及所得的膜结构。 该方法包括在至少高于聚合物基体材料的熔点的温度下制备含有可结晶聚合物基质材料的熔体,然后将熔体形成含有熔融聚合物基体材料的片材。 然后将含有熔融材料的片材冷却以形成含有无定形聚合物基体材料和聚合物基体材料的微晶的片材。 然后将含有无定形聚合物基质材料的片材通过在至少一个方向上拉伸片材形成膜,以形成与至少一些微晶相邻的空隙,从而赋予膜不透明度。 通过上述方法制造的膜结构具有多个空隙,至少一些空隙不包含空隙引发颗粒,并且至少一些空隙与聚合物基质材料中的相邻空隙互连,空隙数为 足以在胶片结构中赋予显着程度的不透明度。