Patent ID: 8418886

Claim:
A package bag comprising a soft package bag main body and a liquid pouring nozzle formed by protruding from a side portion or a top portion of the package bag main body, wherein the package bag main body is provided at its inner surface with a sealant layer, and the liquid pouring nozzle is formed by fusing a pair of front and rear laminate films, each of which films having a three-layer structure comprising a uniaxially oriented or biaxially oriented base film layer which has a steam permeability (JIS K7129) of not more than 10 g/(m 2 /24 h) and inner and outer sealant layers sandwiching the base film layer therebetween, at a surrounding portion other than a base end side thereof at a posture of opposing the inner sealant layers to each other, and the laminate film has a bending strength per 15 mm width of 40-300 mN, and the sealant layer in the inner surface of the package bag main body is fusion-joined to the outer sealant layers of the liquid pouring nozzle at a base end portion of the nozzle.