VERFAHREN ZUM HERSTELLEN VON WIEDERVERSCHLIESSBAREN VERPACKUNGEN, DABEI VERWENDETE PROFILSTREIFEN UND SO HERGESTELLTE VERPACKUNGEN.

摘要

The disclosure relates to a method of forming a recloseable package (10) using special profile strips (20, 30); the strips themselves and a resulting package are disclosed. The profile strips have a flange element (22, 32) and a recloseable means element (24, 34), and two mated profile strips are provided with a heat barrier means (23, 33). The method comprises the steps of providing mated top and bottom profile strips (20, 30) providing top and bottom package films (12, 14) on opposite sides of the mated strips and applying heat and pressure to the films adjacent the flanges (22, 32) sufficient to simultaneously form heat seals respectively between the top film (12) and the top profile strip flange (22) and between the bottom film (14) and bottom profile strip flange (32). The heat barrier means may comprise a thickened flange element (23, 33) buffer strip or a coextrusion of high temperature resin on the inside layer of the flange element. The heat barrier means prevents the flanges from fusing together during the formation of flange-film seals.