| 摘要 |
PROBLEM TO BE SOLVED: To provide a gas-permeable packaging material that is superior to the conventional gas-permeable packaging material in oil resistance and water resistance, and that also has an acid resistance in compliance with the standards of food hygiene law.SOLUTION: Provided is a gas-permeable packaging material 1 comprising a perforated polyethylene terephthalate layer 11, a perforated polyethylene layer 12, a reinforcing-material layer 10 and a micro-porous film layer 13 laminated in this order. The reinforcing-material layer 10 has a network structure in which a first fibrous layer composed of a plurality of first fibers aligned in the same direction to each other, and a second fibrous layer composed of a plurality of second fibers aligned in a different direction from the first fibrous layer and aligned in the same direction to each other, are laminated or woven.SELECTED DRAWING: Figure 1 |
