METHOD AND APPARATUS FOR MANUFACTURING BAG USING BIODEGRADABLE POLYMERIC MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a method and an apparatus for manufacturing a biodegradable bag which are inexpensive, easy and easy to operate, even when printing is made on the surface of the bag. SOLUTION: In the present manufacturing method, a process wherein two porous sheets constituted of a polymeric material of a polylactic resin having biodegradability are laid on each other, a process wherein the side edge parts of the bag of the porous sheets other than one side edge part to be an opening part thereof are joined together by thermal welding and a process wherein the porous sheets are cut uniformly in the final shape of the bags being an isosceles triangle or a rectangle substantially, are executed.