Search International and National Patent Collections

1. (WO2018005577) MULTILAYER FILMS, ARTICLES COMPRISING THE SAME, METHODS OF MANUFACTURING MULTILAYER FILMS

Pub. No.:    WO/2018/005577    International Application No.:    PCT/US2017/039619
Publication Date: Fri Jan 05 00:59:59 CET 2018 International Filing Date: Thu Jun 29 01:59:59 CEST 2017
IPC: B32B 7/02
B32B 27/08
B32B 27/20
B32B 27/28
B32B 27/30
B32B 27/32
B32B 27/34
B65D 65/40
Applicants: DOW GLOBAL TECHNOLOGIES LLC
Inventors: LIN, Yijian
HUANG, Wenyi
BENSASON, Selim
Title: MULTILAYER FILMS, ARTICLES COMPRISING THE SAME, METHODS OF MANUFACTURING MULTILAYER FILMS
Abstract:
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 Mw,cc/Mn,cc of at least 6.0, a Mz,abs of at least 500,000 grams/mol as measured by triple detector GPC, and a density of 0.957 - 0.970 g/cm3, 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 Mw,cc/Mn,cc of at least 6.0, a Mz,abs of at least 500,000 grams/mol as measured by triple detector GPC, and a density of 0.957 - 0.970 g/cm3, 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 cm3•mil/100 in2/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.