초록 ▼

The present invention provides, at low cost, a self-supporting package which is excellent in heat resistance and can be sterilized at high temperatures and the content of which is drunk through a straw. That is, the present invention provides a self-supporting bag which comprises front and back mate

The present invention provides, at low cost, a self-supporting package which is excellent in heat resistance and can be sterilized at high temperatures and the content of which is drunk through a straw. That is, the present invention provides a self-supporting bag which comprises front and back materials consisting of a composite film having a seal layer and having flexibility, and a bottom material consisting of said composite film and folded in the form of the letter W between the front material and the back material, wherein a straw-thrusting film consisting of said composite film is folded in the form of the letter M between the front material and the back material in inverse direction to the bottom material and provided from one side seal to the other side seal of the self-supporting bag, the straw-thrusting film being heat-welded to either one of the front material and the back material, and further provides a self-supporting package comprising said self-supporting bag which is charged with a content and closed by sealing, wherein a seal part is provided in the upper portion of the bag, said seal part having an unsealed part having a width of 2 mm or more in longitudinal direction including therein the upper edge of the straw-thrusting film and a width in lateral direction within the width of the self-supporting bag.

대표청구항 ▼

[ What is claimed is:] [1.]1. A method for producing a self-supporting bag, comprising:placing a front material and a back material, each comprising a flexible film composite having a seal layer, so that the seal layers face each other;placing a straw-thrusting film, comprising a flexible film compo

[ What is claimed is:] [1.]1. A method for producing a self-supporting bag, comprising:placing a front material and a back material, each comprising a flexible film composite having a seal layer, so that the seal layers face each other;placing a straw-thrusting film, comprising a flexible film composite having a seal layer, between the front material and the back material at a top end thereof, folded in half in the form of a letter V, so that the seal layer of the straw-thrusting film faces outward;heat-welding the straw-thrusting film composite to either the front material or the back material in a length which is less than the height of the straw-thrusting film folded in half,placing a bottom material comprising a film composite having a seal layer between the front material and the back material, folded in half in the form of an inverted letter V, so that the seal layer faces outside,sealing the bottom material to the front material and the back material, andsealing the front material to the back material at a first and a second longitudinal sides thereof, to form the self-supporting bag.