US 7,569,263 B2
Packing bag structure
Takashi Hanaichi, Nagoya (Japan); Ken Nishizawa, Nagano (Japan); and Yoshiki Kato, Nabari (Japan)
Assigned to Hokuto Co., Ltd., Nagano-Shi (Japan)
Filed on Sep. 20, 2004, as Appl. No. 10/944,410.
Prior Publication US 2006/0062949 A1, Mar. 23, 2006
Int. Cl. B32B 1/08 (2006.01); B32B 27/08 (2006.01); B29D 22/00 (2006.01); B29D 23/00 (2006.01)
U.S. Cl. 428—35.4  [428/35.2; 428/35.7; 428/36.6; 428/220; 383/102; 383/113] 2 Claims
OG exemplary drawing
 
1. A packing bag structure for Maitake mushroom, comprising an inner bag member made of an inner film of synthetic resin, and an outer bag member made of an outer film of synthetic resin and provided outside to cover said inner bag member, said inner film having moisture permeability of 9.2 to 186 g/(m2·24 h), said outer film having moisture permeability of 5.3 to 9.2 g/(m2·24 h), said inner and outer films having their end parts thermally welded together to form an air layer between said inner and outer bags and proportion in moisture permeability of 1.16 to 20.22.