| 摘要 |
<p>The invention relates to a coating agent for film, characterized by comprising a water-soluble polyvinyl alcohol containing from 3 to 19 mol% of a-olefin units with not more than 4 carbon atoms. The invention also relates to a laminate characterized by comprising (A) a layer of a water-soluble polyvinyl alcohol containing from 3 to 19 mol% of a-olefin units with not more than 4 carbon atoms and (B) a layer of a polyolefin, a polyester or a polyamide, and to a method for producing it. The laminate of the invention exhibits excellent gas barrier properties, covering a broad humidity range of from low humidity to high humidity, and, in addition, its appearance is good and its ability to be formed into bags in high-speed working lines is also good. Further, as having excellent oxygen gas barrier properties, the laminate of the invention is favorable for wrapping films such as food wrapping films, etc. In addition, the laminate has the advantage of not giving harmful hydrogen chloride gas when incinerated.</p> |
