Method of manufacturing packaging container, spout closure, and packaging container

Abstract

Disclosed are a spout stopper with easy open and close operation when being opened or closed, a packaging container, and a packaging container manufacturing method. The spout stopper comprises a spout further comprising a spout tube and base portion, formed by injection molding and disposed upon a spout hole of a packaging container that is formed from a webbing laminate packaging material; a sealed partition of the packaging container that is capable of being ruptured; and a cap that covers the spout. The cap is inserted upon the spout tube in a detachable manner, and comprises a bottom partition, which is partially fused upon the sealed partition such that the sealed partition is capable of being ruptured by the cap, and a pull ring, which is for pulling up on the cap.

1 . A method of manufacturing a packaging container, which comprises
 preparing a web-like laminated packaging material having the predetermined crease lines,   punching the web-like laminated packaging material for every predetermined interval to form pouring holes,   arranging a first mold having the predetermined cavity to cover the inner side of the pouring hole corresponding to the inner side of the container,   arranging a second mold having the predetermined cavity to cover the outside of the pouring hole corresponding to the outside of the container,   injecting melt resin from a cavity gate into the cavities to form a spout tube and a spout of a spout closure and a sealed partition,   forming the web-like laminated packaging material into tube shape to form an overlap of both edges of the packaging material,   longitudinal sealing to the longitudinal direction at the overlap to form a longitudinal seal zone,   filling up with contents in the tube shaped packaging material,   pressing the packaging material to the transverse direction for each predetermined interval,   sealing with the transversal sealing to form a transversal seal zone,   cutting the packaging material at the transversal seal zone to obtain a pillow-shaped preformed body,   folding up along crease lines to obtain the packaging container, and   arranging and sealing a cap to cover the spout, characterized by that the spout closure has the spout having the spout tube provided in the pouring hole of the packaging container and a base integrated with the spout tube and joined to the container panel abound the pouring hole, and the breakable sealed partition provided with the bottom of the spout tube to seal the spout,   the cap covering the spout is detachably inserted in the spout tube, and the cap has a bottom partition adhering to and sealed with the top face of the sealed partition on the undersurface of the cap in order to break the sealed partition, and a pull ring pulling up the inserted cap.   
     
     
         2 . A method of manufacturing the packaging container according to  claim 1 , wherein the bottom partition of the cap has an air hole which penetrates through top and bottom of the partition, in the seal step of the cap, after inserting the cap in the spout tube, via the air hole, a space between the bottom partition and the sealed partition is evacuated, and the bottom partition is heat-sealed to the sealed partition. 
     
     
         3 . A method of manufacturing the packaging container according to  claim 1 , wherein a conductive layer is provided in a seal surface of the bottom partition and/or the sealed partition, in the seal step of the cap, after inserting the cap in the spout tube, the bottom partition adheres to the sealed partition and is heat-sealed to the sealed partition with induction heating. 
     
     
         4 . A method of manufacturing the packaging container according to  claim 1 , wherein a barrier film is arranged on an inwall of the cavity of the first mold, and a barrier layer is formed in at least the inner surface of the sealed partition. 
     
     
         5 . A spout closure comprising a spout having a spout tube provided in a pouring hole of a packaging container and a base integrated with the spout tube and joined to a container panel abound the pouring hole, a breakable sealed partition provided with the bottom of the spout tube to seal the spout, a cap covering the spout, characterized by that the cap is detachably inserted in the spout tube, the cap has a bottom partition adheres to the top face of the sealed partition and is sealed with the top face of the sealed partition on the undersurface of the cap in order to break the sealed partition, and a pull ring pulling up the inserted cap. 
     
     
         6 . A spout closure according to  claim 5 , wherein the cap consists of the bottom partition, a side wall which fits into an inner surface of the spout tube, a top panel which covers an upper end of the spout tube, and an outer wall which covers an outside surface of the spout tube, the outer wall is provided at least at the side and the other side where the pull ring pulls up the cap. 
     
     
         7 . A spout closure according to  claim 5 , wherein the outer wall covers the whole circumferences of the outside surface of the spout tube, at the side where the pull ring pulls up the cap, is breakably provided at the unsealing of the pulling. 
     
     
         8 . The packaging container, obtained by forming the web-like laminated packaging material having crease lines into tube shape, forming an overlap of both edges of the packaging material, longitudinal sealing to the longitudinal direction at the overlap to form a longitudinal seal zone, filling up with contents in the tube shaped packaging material, pressing the packaging material to the transverse direction for each predetermined interval, sealing with the transversal sealing to form a transversal seal zone, cutting the packaging material at the transversal seal zone to obtain a pillow-shaped preformed body, and folding up along crease lines to obtain the packaging container, characterized by that
 the packaging container has a spout closure comprising a spout having a spout tube provided in a pouring hole of the packaging container and a base integrated with the spout tube and joined to the container panel abound the pouring hole, a breakable sealed partition provided with the bottom of the spout tube to seal the spout, and a cap covering the spout,   the cap is detachably inserted in the spout tube, and the cap has a bottom partition adhering to and sealed with the top face of the sealed partition on the undersurface of the cap in order to break the sealed partition, and a pull ring pulling up the inserted cap.