PACKAGING BAG, MANUFACTURING METHOD FOR PACKAGING BAG, BAG FORMING AND PACKAGING MACHINE, AND SEALING JAW

摘要

PROBLEM TO BE SOLVED: To obtain a packaging bag in which layers of paper are superposed and joined without using an adhesive layer between the layers of paper, by using a wrapping material at least one side of which is a paper layer.;SOLUTION: Using a sheet-like wrapping material P composed of only paper made of pulp as its main component, the packaging bag X is manufactured by superposing both sides of the wrapping material P, longitudinally sealing them into a tubular wrapping material P, and laterally sealing the upper and lower ends of the tubular wrapping material P. In the packaging bag X, the longitudinal seal X1 and the lateral seals X2, X2 are joined by joining the two layers of the paper and firmly pressing them so that pulp fibers of the layers of the paper engage with each other. In this case, the longitudinal seal X1 and lateral seals X2 are joined by the longitudinal sealing device and lateral sealing device of the bag forming and packaging machine firmly pressing the two layers of the paper so that the projection and recess extending orthogonal to the extending directions of the longitudinal seal X1 and lateral seals X2, X2 alternate with each other.;COPYRIGHT: (C)2010,JPO&INPIT