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JP-2026075323-A - packaging bag

JP2026075323AJP 2026075323 AJP2026075323 AJP 2026075323AJP-2026075323-A

Abstract

[Problem] To provide a packaging bag that is less likely to leak its contents. [Solution] A packaging bag according to one embodiment comprises a bag body for containing contents to be heated and cooked, and a flap connected to the bag body. The bag body has a first body portion and a second body portion aligned in a first direction, with one of the first tip of the first body portion and the second tip of the second body portion being closed. The flap has a tip portion located opposite the bag body and aligned in a second direction that is closed. The flap is provided with a zipper tape with a steam vent portion and a watertight seal portion for separating the zipper tape from the bag body. The ratio P1 of the length in the second direction intersecting the first direction of the bag body to the sum of the length between the boundary portion between the bag body and the flap and the first tip portion, and the length between the center position of the steam vent portion and the boundary portion, is 2 or more. [Selection Diagram] Figure 1

Inventors

  • 青木 和美
  • 下野 貴裕

Assignees

  • ＴＯＰＰＡＮホールディングス株式会社

Dates

Publication Date
20260508
Application Date
20241022

Claims (10)

  1. A flat-type packaging bag for microwave heating and cooking, A bag body for containing contents to be heated in a microwave oven, It has a first side film portion and a second side film portion facing each other, and a flap connected to the bag body, Equipped with, The bag body is, The first body portion has a first surface film portion and a first bottom film portion that are continuously connected to the first side film portion at the boundary between the bag body and the flap, A second body portion adjacent to the first body portion along the first direction, having a second surface film portion that is continuously connected to the second side film portion at the boundary between the bag body and the flap, and a second bottom film portion that is continuously connected to the first bottom film portion, It has, The first bottom film portion and the second bottom film portion are a common bottom film portion. One of the first end portions of the first body, which is located opposite to the second body in the first direction and along a second direction intersecting the first direction, and the other of the second end portions of the second body, which is located opposite to the first body in the first direction and along a second direction intersecting the first direction, are closed. The pair of first side edges of the first body are sealed, The pair of second side edges of the second body are sealed, The extending directions of the pair of first side edges and the pair of second side edges intersect with the second direction. In the aforementioned flap, the tip located opposite the bag body and along the second direction is closed. The pair of third side edges of the flap are sealed. When the flap is viewed from the thickness direction of the flap, the extending direction of the pair of third side edges intersects with the second direction. The flap is provided with a zipper tape having a steam vent and a watertight seal portion for separating the zipper tape from the bag body. The ratio P1 of the length of the bag body in the second direction to the sum of the length between the boundary portion and the first tip portion and the length between the center position of the steam vent portion and the boundary portion is 2 or more. packaging bag.
  2. The ratio P2 of the length between the lower end of the watertight seal and the boundary to the length between the center position of the steam vent and the boundary is greater than 0 and less than 0.55. The packaging bag according to claim 1.
  3. The ratio P1 is greater than 2.3, and the ratio P2 is greater than 0 and less than or equal to 0.43. The packaging bag according to claim 2.
  4. The ratio P2 is 0.35 or more and 0.43 or less. The packaging bag according to claim 2.
  5. The ratio P3 of the length of the bag body in the first direction to the length between the first tip and the boundary is greater than 2.8 and less than 4. The packaging bag according to claim 2.
  6. The first tip is sealed, A packaging bag according to any one of claims 1 to 5.
  7. The steam vent section is located closer to the boundary than the opening section for opening the first body when viewed from above with the flap tilted toward the first body. The packaging bag according to claim 6.
  8. The steam vent is located closer to the boundary than the first opening portion for opening the first body and the second opening portion for opening the flap when viewed from above with the flap tilted toward the first body, and the first and second opening portions are in the same position or the second opening portion is closer to the boundary than the first opening portion. The packaging bag according to claim 7.
  9. The watertight seal portion has a corrugated seal, A packaging bag according to any one of claims 1 to 5.
  10. In at least the pair of second side edges of the second body portion, a line mark is formed along the second direction at a position corresponding to the first tip when the first body portion is folded back toward the second body portion relative to the boundary portion. A packaging bag according to any one of claims 1 to 5.

Description

This invention relates to packaging bags. Patent Document 1 describes a packaging bag for microwave heating. The packaging described in Patent Document 1 has a peripheral seal portion with three sides sealed, and a zipper tape on the remaining side. This configuration allows consumers to place food or other contents into the packaging bag through the zipper tape and seal it. Consumers can also remove the contents after heating through the zipper tape. In the packaging described in Patent Document 1, the two packaging films have a gusseted seal portion that protrudes outward from the packaging. The gusseted seal portion is designed to be easily opened, allowing for release of internal pressure when heating increases. Japanese Patent Publication No. 2021-104813 Figure 1 is a plan view of the packaging bag according to this embodiment, as seen from the surface.Figure 2 is a diagram showing the flap of the packaging bag shown in Figure 1 cut out.Figure 3 is a plan view of the packaging bag shown in Figure 1, viewed from the bottom.Figure 4 is a perspective view of the packaging bag shown in Figure 1.Figure 5 is a plan view of the packaging bag containing the first contents, which are part of the contents to be cooked.Figure 6 is a diagram illustrating the chuck tape and the watertight seal.Figure 7 is a schematic diagram showing an example of the structure of the film that forms the packaging bag shown in Figure 1.Figure 8 is a diagram illustrating the intermediates produced in the intermediate manufacturing process of the packaging bag manufacturing method shown in Figure 1.Figure 9 is a plan view of the intermediate shown in Figure 8.Figure 10 is a diagram illustrating the steam venting process in the packaging bag manufacturing method shown in Figure 1.Figure 11 is a diagram illustrating the side edge sealing process of the packaging bag manufacturing method shown in Figure 1.Figure 12 is a diagram illustrating the folding process involved in the manufacturing method of the packaging bag shown in Figure 1.Figure 13 is a diagram illustrating the bending process involved in the intermediate manufacturing process that produces the intermediate shown in Figure 8.Figure 14 is a diagram illustrating the third tip sealing step in the intermediate manufacturing process for producing the intermediate shown in Figure 8.Figure 15 is a diagram illustrating the first tip opening step and the supply port formation step, which are part of the intermediate manufacturing process for producing the intermediate shown in Figure 8.Figure 16 is a diagram illustrating the chuck tape attachment process, which is part of the intermediate manufacturing process for producing the intermediate shown in Figure 8.Figure 17 is a diagram illustrating the watertight seal formation process in the intermediate manufacturing process for producing the intermediate shown in Figure 8.Figure 18(a) is a diagram showing one step in the method of using the packaging bag, Figure 18(b) is a diagram showing a step following the step shown in Figure 18(a) in the method of using the packaging bag, Figure 18(c) is a diagram showing a step following the step shown in Figure 18(b) in the method of using the packaging bag, and Figure 18(d) is a diagram showing a step following the step shown in Figure 18(c) in the method of using the packaging bag.Figure 19(a) is a diagram showing the steps following the steps shown in Figure 18(d) in the method of using the packaging bag, and Figure 19(b) is a diagram showing the steps following the steps shown in Figure 19(a) in the method of using the packaging bag.Figure 20 is a diagram illustrating an example of how the impact of a fall is transmitted when a packaging bag is dropped.Figure 21 is a schematic diagram showing the arrangement of multiple packaging bags when transporting multiple packaging bags.Figure 22 is a schematic diagram showing the arrangement of multiple packaging bags when transporting multiple packaging bags in a reference example.Figure 23 is a chart showing the results of experimental examples 1 to 10.Figure 24 is a plan view of the modified packaging bag as seen from the surface.Figure 25 is a plan view of the packaging bag shown in Figure 24, as seen from the bottom.Figure 26 is a plan view of the packaging bag shown in Figure 24 when it contains the first contents, which are part of the contents to be heated and cooked.Figure 27 is a diagram illustrating the intermediate produced in the third example of the intermediate production process of the packaging bag manufacturing method shown in Figure 24. The embodiments of the present invention will be described below with reference to the drawings. The same elements are denoted by the same reference numerals. Repetitive descriptions will be omitted. The dimensional ratios in the drawings do not necessarily correspond to those described. Figure 1 is a front view of the packaging bag 1 according to this embodiment. Figure 2 is a cutaway view of the pa