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    • 20. 发明申请
    • MULTILAYER FILMS, ARTICLES COMPRISING THE SAME, METHODS OF MANUFACTURING MULTILAYER FILMS
    • 多层膜,包含其的制品,制造多层膜的方法
    • WO2018005577A1
    • 2018-01-04
    • PCT/US2017/039619
    • 2017-06-28
    • DOW GLOBAL TECHNOLOGIES LLC
    • LIN, YijianHUANG, WenyiBENSASON, Selim
    • B32B7/02B32B27/08B32B27/20B32B27/28B32B27/30B32B27/32B32B27/34B65D65/40
    • B32B27/08B32B7/02B32B7/035B32B27/20B32B27/285B32B27/306B32B27/32B32B27/34B32B38/0012B32B2038/0028B32B2250/05B32B2250/40B32B2264/104B32B2270/00B32B2274/00B32B2307/516B32B2307/724B32B2439/40B32B2439/70B65D65/40
    • The present invention provides multilayer films, packages formed from such films, and methods of making multilayer films. In one aspect, a multilayer film comprises multilayer film comprising at least 3 layers, each layer having opposing facial surfaces and arranged in the order A/B/C, wherein Layer A comprises a high density polyethylene having a M w,cc /M n,cc of at least 6.0, a M z,abs of at least 500,000 grams/mol as measured by triple detector GPC, and a density of 0.957 - 0.970 g/cm 3 , wherein the high density polyethylene comprises at least 90 percent by weight of Layer A; Layer B comprises a gas permeation layer, wherein a top facial surface of Layer B is in adhering contact with a bottom facial surface of Layer A; and Layer C comprises a high density polyethylene having a M w,cc /M n,cc of at least 6.0, a M z,abs of at least 500,000 grams/mol as measured by triple detector GPC, and a density of 0.957 - 0.970 g/cm 3 , wherein the high density polyethylene comprises at least 90 percent by weight of Layer C and wherein a top facial surface of Layer C is in adhering contact with a bottom facial surface of Layer B, wherein the film is oriented in the machine direction and wherein the film exhibits a normalized carbon dioxide transmission rate of at least 3000 cm 3 •mil/100 in 2 /day when measured according to ASTM F-2476 at 23 °C, 0% relative humidity, and 1 atm, and wherein the film exhibits a ratio of the carbon dioxide transmission rate to an oxygen transmission rate of at least 4.0, when the oxygen transmission rate is measured according to ASTM D3985 at 23 °C, 0% relative humidity, and 1 atm.
    • 本发明提供了多层膜,由这种膜形成的包装以及制造多层膜的方法。 在一个方面,多层膜包含多层膜,其包含至少3层,每层具有相对的面部表面并按A / B / C的顺序排列,其中层A包含具有M w,cc的高密度聚乙烯 通过三重检测器GPC测得的至少6.0,至少500,000克/摩尔的M z,abs,和密度 为0.957-0.970克/厘米3,其中高密度聚乙烯包含至少90重量%的层A; 层B包括气体渗透层,其中层B的顶部面部表面与层A的底部面部表面粘附接触; 并且层C包含M w,cc / M n,cc为至少6.0的高密度聚乙烯,M z,abs, 通过三重检测器GPC测量为至少500,000克/摩尔,密度为0.957-0.970克/厘米3,其中高密度聚乙烯包含至少90重量%的层C,并且其中 层C的顶部面部表面与层B的底部面部表面粘附接触,其中所述膜沿机器方向取向并且其中所述膜显示出至少3000cm 3的归一化二氧化碳透过率, 当按照ASTM F-2476在23℃,0%相对湿度和1大气压下测量时,所述薄膜显示出的比率为100m 2/100英寸2 /天 当在23℃,0%相对湿度和1个大气压下根据ASTM D3985测量氧气透过速率时,将二氧化碳透过率调节至至少4.0的透氧率。