| 摘要 |
<p>PURPOSE:To obtain a packaging material in which oxygen barrier properties and steam barrier properties are not lowered by spraying gas containing ozone to one side surface of a heat sealable thermoplastic resin heat-melted in a curtain state, extruding it, and laminating it by a coating method. CONSTITUTION:The packaging material is formed by laminating a base material 1 made of polyethylene, polypropylene, etc., a metal oxide layer 2 made of magnesium oxide, silicon oxide, etc., and a heat sealable thermoplastic resin layer 4. The layer 2 is formed on the material 1 by a vacuum vapor-depositing method, an ion plating method. A urethane series, polybutadiene series anchor coating layer 3 is formed on the layer 2. Then, the resin 4 is extruded on the layer 3 by a coating method. In this case, at least one side surface is being coated with the resin melted and extruded in a curtain state by activating the spraying surface with gas such as the air containing ozone.</p> |
