Dual compartment pouch having pressure-openable non-sealing line and heat sealing mould therefor

Abstract

The present invention provides a duplex pouch and a heat-sealing mould for manufacturing the same. The duplex pouch has a pressure-openable non-sealing line of which a specific portion can be opened by a dynamic load that is generated when an external force is applied thereto, and includes a first chamber and a second chamber that are sealed by an external sealing line at their edges and a middle portion of the two chambers is heat-sealed by an inside sealing line to contain different types of liquid contents, respectively, a pressure-openable portion formed at the middle portion of the inside sealing line, a non-sealing unit formed in a rounded triangular or semicircular shape at the center of the pressure-openable portion by first and second branch sealing lines divided by the inside sealing line and then extended, a long non-sealing line provided in a middle of the first branch sealing line and communicating the first chamber and the non-sealing unit, and a short non-sealing line provided in the middle of the second branch sealing line and communicating the non-sealing unit and the second chamber. The heat-sealing mould forms the pouch by heat-sealing two sheets of films, and long and short notches may be formed in the first and second branch sealing pads that correspond to the first and second branch sealing lines, or long and short heat sinks may be formed between the first and second branch sealing lines.

1 . A duplex pouch having a pressure-openable non-sealing line, comprising:
 a first chamber and a second chamber that are sealed by an external sealing line at their edges and a middle portion of the two chambers is heat-sealed by an inside sealing line to contain different types of liquid contents, respectively;   a pressure-openable portion formed at a middle portion of the inside sealing line;   a non-sealing unit formed in a round triangular or semicircular shape at the center of the pressure-openable portion  10  by first and second branch sealing lines divided by the inside sealing line and then extended;   a long non-sealing line provided in the middle of the first branch sealing line and communicating the first chamber and the non-sealing unit; and   a short non-sealing line provided in the middle of the second branch sealing line and communicating the non-sealing unit and the second chamber.   
     
     
         2 . The duplex pouch of  claim 1 , wherein the width of each of the first and second branch sealing lines is set to correspond to ⅓ of the width of the inside sealing line. 
     
     
         3 . The duplex pouch of  claim 1 , wherein the length of the long non-sealing line of the pressure-openable portion is 4 to 10 mm, and the length of the short non-sealing line is 0.4 to 0.9 times that of the long non-sealing line. 
     
     
         4 . The duplex pouch of  claim 1 , wherein the pressure-openable further comprises a pair of enhanced sealing lines forming an acute angle by being extended from the inside sealing line, and the first and second branch sealing lines are respectively divided into two from the enhanced sealing line and then extended. 
     
     
         5 . The duplex pouch of  claim 4 , wherein the width of each of the first and second branch sealing lines is set to correspond to ⅓ of the width of the inside sealing line. 
     
     
         6 . The duplex pouch of  claim 4 , wherein the length of the long non-sealing line of the pressure-openable portion is 4 to 10 mm, and the length of the short non-sealing line is 0.4 to 0.9 times that of the long non-sealing line. 
     
     
         7 . A heat-sealing mould for manufacturing a duplex pouch having a pressure-openable non-sealing line, comprising a heat compression pad at one part thereof and a linear heater at another part to form two separate chambers by heat-sealing external and internal sealing lines to two sheets of films,
 wherein the heat compression pad comprises an inner sealing pad corresponding to an inner sealing line, an enhanced pad forming an enhanced sealing line, and first and second branch sealing pads respectively corresponding to first and second branch sealing lines, and a long notch and a short notch are provided for forming the long non-sealing line and the short non-sealing line in the first and second branch sealing pads.   
     
     
         8 . A heat-sealing mould for manufacturing a duplex pouch having a pressure-openable non-sealing line, comprising a heat compression pad at one part of the mould and a linear heater at another part of the mould for forming two separate chambers by heat-sealing external and internal sealing lines to two sheets of films,
 wherein the linear heater comprises an enhanced line forming an enhanced sealing line in the internal sealing line and first and second branch lines respectively forming first and second branch sealing lines extended from the internal sealing line, and a long heat sink and a short heat sink are respectively provided between the first and second branch sealing lines to form long and short non-sealing lines.