Abstract: A pouch includes a bag body, a zipper, and a closing sheet. The bag body includes an accommodation space that can accommodate contents, a first aperture for opening the accommodation space, and a second aperture formed so as not to face the first aperture, for opening the accommodation space. The zipper is attached to the bag body, and unseals and seals the first aperture. The zipper includes a male part and a female part. The closing sheet is attached to the bag body so as to separate the male part and the female part of the zipper from the accommodation space. The closing sheet includes a weakened part that can be broken when unsealing of the zipper.

Abstract: A packaging bag having a steam venting function capable of releasing pressure inside a package even when heating cooking is performed by a microwave oven and preventing the inside of the bag from being contaminated and the package using the packaging bag. The packaging bag includes two pieces of front and back main body films having sealant layers which are opposed to each other with the sealant layers facing inward, side seal parts, and a bottom seal part. The front body film is folded in the vicinity of the bottom seal part throughout the entire width of the bag and parallel with the bottom seal part to form a fold-in part. A steam venting port is formed in the fold-in part, and an easily peelable tape covering the steam venting port is disposed on the inside of the fold-in part throughout the width of the bag and parallel with the fold-in part, and then heat-sealed.

Abstract: A packaging bag having a steam venting function capable of releasing pressure inside a package even when heating cooking is performed by a microwave oven and preventing the inside of the bag from being contaminated and the package using the packaging bag. The packaging bag 1 comprises two pieces of front and back main body films 2 and 3 having sealant layers 2s and 3s which are opposed to each other with the sealant layers facing inward, side seal parts 5, and a bottom seal part 4. The front body film 2 is folded in the vicinity of the bottom seal part 4 throughout the entire width of the bag and parallel with the bottom seal part to form a fold-in part 8. A steam venting port 11 is formed in the fold-in part 8, and an easily peelable tape 12 covering the steam venting port 11 is disposed on the inside of the fold-in part 8 throughout the width of the bag and parallel with the fold-in part8, and then heat-sealed.

Abstract: A packaging material is provided having a paper layer and a first coating layer laminated thereon, the first coating layer includes a first material and a second material, wherein the first material is a natural rubber or a derivative thereof, and the second material is a material selected from natural resins, waxes and derivatives thereof having permeability into paper. In addition, a packaging material is provided further having a second coating layer laminated having oil resistance, which consists of a biodegradable material.