METHOD FOR MANUFACTURING A BAG BY MEANS OF BLOWN FILM EXTRUSION

摘要

The invention relates to a method for manufacturing (S) a bag (3) by means of blown film extrusion, including the following steps: extruding (S2) plastic such as to form an annular film (2) including closing assemblies (10, 20), said annular film being intended to form the walls of the bag; and blowing (S5) the annular film such as to form a sheath, the complementary profile sections (14, 24) of each of the closing assemblies (10, 20) being integrally formed with a base (18, 28) connected to the annular film (2) via a connection rod (19, 29) that extends parallel to the longitudinal axis (X) between the annular film (2) and the base (18, 28) and is designed to keep the base (18, 28) separated from the annular film (2).

主权项

1. A method for manufacturing a bag by means of blown film extrusion, said bag comprising main walls each comprising, on an internal face, a closing assembly comprising a series of complementary profiles which extend in parallel in a main direction extending according to a longitudinal axis, the manufacturing method comprising the following steps:
extruding plastic material so as to form an annular film comprising the closing assemblies, said annular film being intended to form the walls of the bag, and blowing the annular film so as to form a jacket,wherein, during the extrusion step, the complementary profiles of each of the closing assemblies are integrally formed with a base connected to the annular film by means of a connecting rod extending in parallel to the longitudinal axis between the annular film and the base, and wherein the connecting rod is configured to keep the base at a distance from the annular film.