PACKAGING MATERIAL FOR PRESERVING FRESHNESS AND METHOD FOR PRODUCING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a packaging material capable of easily forming a ventilation passage having a narrow width in a joining region, and a method for manufacturing the packaging material.;SOLUTION: According to the present invention, a bag-like freshness-preserving packaging material 100 formed of a film 1 has belt-like joining regions 6 in each of which two ends of the film are overlapped and bonded. The joining region includes a plurality of joining parts 8 where the two ends of the film are joined by a linear weld part 10; a freshness-preserving packaging material is provided in which a plurality of joining parts are arranged at intervals along an end part and ventilation passages 12 communicating between the inside space of the packaging material and the outside provided between adjacent joining parts.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2019,JPO&INPIT