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    • 5. 发明申请
    • COATED FILMS AND PACKAGES FORMED FROM SAME
    • 涂层膜和由其形成的包装
    • WO2017210087A1
    • 2017-12-07
    • PCT/US2017/034525
    • 2017-05-25
    • DOW GLOBAL TECHNOLOGIES LLC
    • KELLY-ROWLEY, Anne M.CHURCHFIELD, Mechelle A.WAGNER, Nicole L.POPA, Paul J.JOPKO, LarrySERRAT, Cristina
    • C08J7/04B32B27/32C08L23/08
    • 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 polyethylene having a density 0.930 g/cm 3 or less 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 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, wherein the polyethylene is a medium density polyethylene or a high density polyethylene; and (b) a coating on an outer surface of the second layer of the film comprising a crosslinked polyurethane, wherein the coating is substantially free of isocyanate groups. In some embodiments, the coated film is thermally resistant when subjected to a W-fold test at a temperature of at least 230° F, and/or has a gloss of at least 70 units at 60°.
    • 本发明提供了由这种膜形成的涂覆膜和包装。 在一个方面,涂覆膜包含(a)包含(i)第一层和第二层的膜,所述第一层包含70至100重量%的密度为0.930g / cm 3或更小的聚乙烯和 峰值熔点低于126℃; (ii)第二层,其包含60至100重量%的聚乙烯,其密度为0.905至0.970g / cm 3且峰值熔点为100℃; C到135° C; 和(iii)第一层和第二层之间的至少一个内层,其包含40至100重量%的密度为0.930至0.970g / cm 3的聚乙烯和峰值熔融 指向120°的范围内。 C到135° 其中聚乙烯是中密度聚乙烯或高密度聚乙烯; 和(b)在包含交联聚氨酯的膜的第二层的外表面上的涂层,其中涂层基本上不含异氰酸酯基团。 在一些实施方案中,当在至少230℃的温度下进行W-折叠测试时,涂覆的薄膜是耐热的。 F,和/或在60℃时具有至少70个单位的光泽。