Patent ID: 8628638
Filing Date: 2014-01-14
Classification: B32B,Y10T

Abstract:
1. A method of manufacturing a laminate, comprising: providing a substrate of a polyethylene terephthalate film; forming an aluminum oxide layer on the substrate; coating the aluminum oxide layer with a gas barrier coating layer comprising polyvinyl alcohol and a hydrolysis product of at least one metal alkoxide; pretreating a surface of the gas barrier coating layer by plasma treatment using reactive ion etching or ion bombardment, the surface of the gas barrier coating layer being pretreated by plasma treatment such that a functional group ratio D (C—OH/C—C) of a carbon-hydroxyl group bond (C—OH) to a carbon-carbon bond (C—C) in the polyvinyl alcohol measured by X-ray photoelectron spectroscopy becomes 0.25 or more to 0.87 or less; and extrusion-laminating a low-density polyethylene film directly on the pretreated surface of the gas barrier coating layer.