A PROCESS AND APPARATUS FOR MANUFACTURING BAGS MADE OF BIODEGRADABLE MATERIAL PLASTIC AND BAG THUS OBTAINED

摘要

A process for manufacturing bags made of a biodegradable or biodegradable-compostable plastic material and without any bellows, said process comprising the following sequence of steps: loading a reel (12′) of plastic film (13) obtained by blown-film extrusion and having a width which corresponds to the width of at least one bag (50) to be formed; longitudinally cutting along cutting lines (15) to form at least two longitudinal bands (13′); separating the bands to a given “D” distance from each other, and longitudinally welding; said steps being a function of the transversal dimension or width of the bag to be manufactured; transversally welding each individual longitudinal band (13′) to define band portions (27) which corresponds to the longitudinal dimensions of the bags (50) to be formed, punching said band portions (27), moving and unloading the bags (50) thus formed.