| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of predicting a gas barrier property of a packaging material after producing a food product sterilized by boil-retort treatment, the food product using a laminate film composed of a gas barrier film as the packaging material, and to provide a method of producing the food product sterilized by the boil-retort treatment, the gas barrier property of the packaging material after the production of the food product being not deteriorated.SOLUTION: A content is charged while employing, as a packaging material, a gas barrier property film on which a test pattern is printed on an entire front surface, and sealing is performed, and thereafter change in dimension of the printed test pattern after heat treatment is measured to thereby predict a gas barrier property of the packaging material after the heat treatment. A food product sterilized by boil-retort treatment is produced under a condition that the test shows that an increased amount in dimension of the test pattern after the heat treatment is 0.6% or lower of the original dimension. |
