Packaging bag with spout and method for producing packaging bag with spout

Inventors: Toshihiko Mori (Tokyo, JP); Hiroshi Kuwabara (Tokyo, JP); Naoto Fujikawa (Tokyo, JP)

Assignee: ZACROS CORPORATION

B65D75/5883 B29C65/18 B29C65/20 B29C65/2076 B29C65/72 B29C66/1122 B29C66/53263 B29C66/71 B29C66/723 B29C66/73713 B29C66/73921 B29C66/83221 B29C66/919 B29C66/949 B31B70/844 B60P7/00 B65D75/008 B29C65/70 B29C66/7352 B29K2023/06 B29L2031/7128 B31B2160/20 B65D2207/00 B65D2575/583

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Quick Facts

Patent No.: US 12679619
App. No.: 18/033,284
Granted: Jul 14, 2026
Kind: B2

External Links

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Abstract

A packaging bag with a spout including a container main body accommodating a content, and a spout member for pouring out the content inside the container main body. The spout member has a base portion attached to the container main body, and a spout tube portion having a flow channel through which the content is poured out formed therein. The container main body is made using a polyethylene film. The spout member is a polyethylene molded body.

Claims (18)

1 . A method for producing a packaging bag with a spout including a container main body accommodating a content, and a spout member for pouring out the content inside the container main body,

wherein the spout member has

a base portion attached to the container main body, and

a spout tube portion having a flow channel through which the content is poured out formed therein,

wherein the container main body is made using a polyethylene film,

wherein the spout member is a polyethylene molded body, and

wherein the method comprises:

a step of heating only a surface of the base portion in a circumferential direction to a temperature equal to or higher than a melting point of the polyethylene by bringing a heated mold into contact with a side surface of the base portion, and

a step of heat sealing side surfaces of the base portion and the container main body by bringing a mold with a surface temperature set between 120° C. and 220° C. into contact with the base portion and the container main body in a state of inserting the heated base portion into the container main body.

2 . The method for producing the packaging bag with the spout according to claim 1 , wherein the step of heating is a step in which the surface temperature of the mold that comes into contact with the side surface of the base portion is set to 130° C. to 230° C. and the mold is brought into contact with the side surface of the base portion for 0.5 seconds to 3.0 seconds.

3 . The method for producing the packaging bag with the spout according to claim 1 , wherein a surface of the mold that comes into contact with the side surface of the base portion is subjected to mold release processing.

4 . The method for producing the packaging bag with the spout according to claim 1 ,

wherein a surface of the mold that comes into contact with the side surface of the base portion has a three-dimensional shape, and

wherein the step of heating is a step in which the three-dimensional shape is transferred to the side surface of the base portion.

5 . The packaging bag with the spout, which is produced by the method according to claim 1 .

6 . The packaging bag with the spout according to claim 5 , wherein the polyethylene film is made using a stretched polyethylene layer and an unstretched polyethylene layer.

7 . The packaging bag with the spout according to claim 5 , wherein the packaging bag is a standing pouch.

8 . The method for producing the packaging bag with the spout according to claim 1 , wherein the step of heat sealing is performed immediately after the step of heating without any intervening step.