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    • 1. 发明申请
    • COATED FILMS AND PACKAGES FORMED FROM SAME
    • 包装膜和从其形成的包装
    • WO2016196168A1
    • 2016-12-08
    • PCT/US2016/034265
    • 2016-05-26
    • DOW GLOBAL TECHNOLOGIES LLCROHM AND HAAS COMPANY
    • MIYAKE, Kevin K.GOMES, Jorge C.JOPKO, LarryMAZZOLA, Nicolas C.CASARRUBIAS, Juan CarlosHERNANDEZ, ClaudiaCIPRO, Mateus
    • B32B27/08B32B27/32C08J7/04
    • C08J7/047B32B27/08B32B27/32B32B2250/24B32B2250/242B32B2255/10B32B2255/26B32B2270/00B32B2307/306B32B2307/7242B32B2439/46C08G18/10C08G18/1825C08G18/4812C08G18/4825C08G18/4829C08G18/7621C08J2323/04C08J2475/04
    • The present invention provides coated films and packages formed from such films. In one aspect, a coated film comprises (a) a film comprising (i) a first layer comprising from 70 to 100 percent by weight of a linear low density polyethylene having a density less than 0.930 g/cm 3 and a peak melting point of less than 126° C; (ii) a second layer comprising from 60 to 100 percent by weight polyethylene having a density of 0.905 to 0.970 g/cm 3 and a peak melting point in the range of 100° C to 135° C; and (iii) at least one inner layer between the first layer and the second layer comprising from 40 to 100 percent by weight of a high density polyethylene having a density from 0.930 to 0.970 g/cm 3 and a peak melting point in the range of 120° C to 135° C; and (b) a coating on an outer surface of the second layer of the film comprising polyurethane. In another aspect, the coated film comprises a monolayer comprising from 70 to 100 percent by weight of a polyethylene having a density less than 0.930 g/cm 3 , a melt index (I2) of less than 2.0g/10 minutes and a peak melting point of less than 126° C, and a coating on an outer surface of the film comprising polyurethane In some embodiments, the coated film is thermally resistant under the sealing conditions of ASTM 1921-98 over a temperature range of 80° C to 180° C, and/or has a gloss of at least 70 units at 60°.
    • 本发明提供了由这些膜形成的涂膜和包装。 一方面,涂膜包含(a)包含(i)包含70-100重量%密度小于0.930g / cm 3的线性低密度聚乙烯和峰值熔点小于等于的第一层的膜 126℃; (ii)包含60至100重量%的密度为0.905至0.970g / cm 3的聚乙烯和峰值熔点在100℃至135℃范围内的第二层; 和(iii)在第一层和第二层之间的至少一个内层包含40-100重量%的密度为0.930-0.970g / cm3的高密度聚乙烯,峰值熔点在120℃的范围内 C至135℃; 和(b)在包含聚氨酯的膜的第二层的外表面上的涂层。 另一方面,涂膜包括单层,其包含70-100重量%的密度小于0.930g / cm 3的熔融指数(I2)小于2.0g / 10分钟的聚乙烯和峰值熔点 小于126℃的膜和在包含聚氨酯的膜的外表面上的涂层在一些实施方案中,涂覆的膜在ASTM 1921-98的密封条件下在80℃至180℃的温度范围内是耐热的 ,和/或在60°下具有至少70单位的光泽度。
    • 7. 发明申请
    • FLEXIBLE FILM COMPOSITION FOR HEAT SEALS AND CONTAINER WITH SAME
    • 用于热密封和容器的柔性膜组合物
    • WO2015057501A1
    • 2015-04-23
    • PCT/US2014/059996
    • 2014-10-10
    • DOW GLOBAL TECHNOLOGIES LLC
    • LAI, Chuan YarBRUNNER, KurtVAN DUN, Jozef J.I.MAZZOLA, Nicolas C.ARROYO VILLAN, Maria Isabel
    • B32B27/08B32B27/32B32B27/34B32B27/36B32B27/40
    • B65D65/02B32B7/02B32B7/12B32B27/065B32B27/08B32B27/304B32B27/306B32B27/32B32B27/325B32B27/327B32B27/34B32B27/36B32B2270/00B32B2274/00B32B2307/31B32B2307/582B32B2307/72B32B2439/46
    • The present disclosure is directed to compositions and film structures suitable for heat seal production. The heat sealable flexible film structure includes: a layer (A) comprising a blend comprising from 35 to 80 percent by weight of the layer (A) of a propylene based plastomer or elastomer ("PBPE") and from 20 to 65 percent by weight of the layer (A) of a low density polyethylene having a density in the range of from 0.915 g/cm 3 to 0.935 g/cm 3 , wherein the blend has a melt index (as determined according to ASTM D 1238 (at 190°C/2.16 Kg); a layer (B), adjacent to layer (A), comprising a polyolefin-based polymer, wherein the polymer or polymer blend which makes up layer (B) flows more easily than the blend of layer (A) under conditions intended for making a hard seal with the film structure; and an outermost layer (C) comprising a material having a melting point greater than 140°C; wherein the ratio of the thickness of layer (B) to the thickness of layer (A) is 3:1 or greater. The heat sealable flexible film structure is used to make a flexible container having one or more heat seals. The heat seal can be a frangible heat seal, a hard heat seal, or a combination of frangible heat seals and hard heat seals depending on the sealing conditions.
    • 本公开涉及适于热封生产的组合物和膜结构。 可热封的柔性膜结构包括:包含共混物的层(A),其包含基于丙烯的塑性体或弹性体(“PBPE”)的层(A)的35至80重量%和20至65重量% 的密度在0.915g / cm 3至0.935g / cm 3范围内的低密度聚乙烯层(A),其中该共混物具有熔体指数(根据ASTM D 1238测定(190℃/ 2.16Kg);与层(A)相邻的层(B),其包含聚烯烃基聚合物,其中组成层(B)的聚合物或聚合物共混物比条件(A)的共混物更容易流动 用于与薄膜结构进行硬密封;以及包含熔点大于140℃的材料的最外层(C);其中层(B)的厚度与层(A)的厚度的比率 是3:1或更大,可热封的柔性膜结构用于制造具有一个或多个热封的柔性容器 根据密封条件,热封可以是易碎热封,硬热密封或易碎热密封和硬热密封的组合。