| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a packing bag excellent in transparency, having a high gas barrier property (an oxygen barrier property and a steam barrier property), maintaining the high gas barrier property and also maintaining strength of hardly causing bag breaking, even after applying heating sterilization treatment such as boil and retort sterilization.SOLUTION: A packing bag for heating sterilization is composed of a laminate of laminating a silicon oxide vapor deposition layer 3, a gas barrier coating layer 4 and a heat fusion layer 5 on a base material film 1 via a primer layer 2, and the primer layer is formed by mutually reacting acrylic polyol, isocyanate and a silane coupling agent, and the gas barrier coating layer is formed by coating-drying a coating liquid including a general formula Si(OR)or its hydrolysate, a water-soluble polymer, a general formula (RSi(OR))or its hydrolysate.</p> |
