| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a deep drawing packaging material with spontaneous unsealing function corresponding to microwave oven cooking, to which a high temperature softening resin layer is applicable, and which saves time and labor in cooking and improves productivity of packaging materials in manufacturing process. <P>SOLUTION: A bottom material 3 and a top material 2 has a laminated structure in which at least a sealant layer 17, 29, a printed base material 13, 23, and a surface base material 11, 21 are laminated in order starting from an inner surface, respectively. In the top material 2, a steam port portion 7 made of a pattern coated high temperature softening resin 18 is formed between the sealant layer 17 and the surface base material layer 11, and a protruded portion (a) protruding a part, correspponding to the central part of the container, of the steam port portion 7 toward the content 5 side is disposed on a heat seal on the peripheral edge of the steam port portion 7. <P>COPYRIGHT: (C)2013,JPO&INPIT |
