Zippered pouch with spout

Abstract

A pouch comprises a plurality of plastic sheets sealed on periphery, has a contents spout and a plastic zipper arranged in a fused state between the sheets whose outer periphery is sealed, and is heat-sterilized after being filled with contents. A a barrier portion is formed in a portion of the pouch interior set further toward the contents and away from the plastic zipper, the barrier portion formed in a state in which a film base material has been folded over. As a result, even if any damage is imparted during the step for manufacturing the plastic zipper or the step for mounting the zipper in the pouch, there will be no incidence of the contents leaking from the barrier portion and reaching the zipper portion due to heat and pressure encountered when retort sterilization, boiling, or another type of heat sterilization is performed after the pouch has been filled with foodstuffs or other material.

1 . A zippered pouch with a spout comprising a plurality of plastic sheets sealed on periphery, the pouch having a contents spout and a plastic zipper arranged in a fused state between the sheets whose outer periphery is sealed, and the pouch being heat-sterilized after being filled with contents and sealed, wherein:
 the plastic zipper has   a linear convexity formed on one surface of a film base material;   a concavity into which the convexity fits, the concavity formed on a surface of a film base material facing the convexity;   a barrier portion formed on a portion set further toward the contents and away from the convexity and the concavity, the barrier portion being formed in a state in which the film base material has been folded over; and   a tongue piece providing a fluid-tight barrier between the side of the pouch interior on which the contents spout is disposed and the other side, the tongue piece extending from the barrier portion towards the contents on at least one of the film base materials of the barrier portion.   
     
     
         2 . The zippered pouch with a spout of  claim 1 , wherein the rupture strength of the barrier portion is 10 to 150 N/50 mm width. 
     
     
         3 . The zippered pouch with a spout of  claim 1  or  2 , wherein the contents spout is set apart from the zipper on the pouch outer periphery and comprises an outlet member that is different from the plastic sheet. 
     
     
         4 . The zippered pouch with a spout of  claim 1 , wherein the pouch is a bottomed pouch. 
     
     
         5 . The zippered pouch with a spout of  claim 2 , wherein the pouch is a bottomed pouch. 
     
     
         6 . The zippered pouch with a spout of  claim 3 , wherein the pouch is a bottomed pouch.