Flexible package

Patent metadata

Field	Value
Publication number	US-9499322-B2
Application number	US-201514803943-A
Country	US
Kind code	B2
Filing date	Jul 20, 2015
Priority date	Jan 25, 2013
Publication date	Nov 22, 2016
Grant date	Nov 22, 2016

Abstract

A flexible package including a package body including a first side-surface film and a second side-surface film sealed in a peripheral portion such that a storage portion is formed in the package body. The package body has sealed portions formed in side edge portions such that a non-sealed portion is formed in at least one of the sealed portions. The non-sealed portion has a gas injection portion containing a gas which has a specific heat at constant volume of 0.67 kJ/kg·deg or higher at 0° C. and 1 atm. The gas injection portion has a diameter in a range of from 3 mm to 50 mm and is formed such that a repelling force is in a range of from 4 N to 30 N at 23° C. and 1 atm when an entire gas injection portion is nipped from both sides of the first and second side-surface films and squeezed until a nipped gas injection portion has a width equal to a half of the diameter of the gas injection portion.

First claim

What is claimed is:

1. A flexible package, comprising:
a package body comprising a first side-surface film and a second side-surface film sealed in a peripheral portion such that a storage portion is formed in the package body,
wherein the package body has sealed portions formed in side edge portions such that a non-sealed portion is formed in at least one of the sealed portions,
the non-sealed portion has a gas injection portion containing a gas which has a specific heat at constant volume of 0.67 kJ/kg·deg or higher at 0° C. and 1 atm,
the gas injection portion has a diameter in a range of from 3 mm to 50 mm and is formed such that a repelling force is in a range of from 4 N to 30 N at 23° C. and 1 atm when an entire gas injection portion is nipped from both sides of the first and second side-surface films and squeezed until a nipped gas injection portion has a width equal to a half of the diameter of the gas injection portion, and
the side edge portions have a slit that extends in a direction towards the gas injection portion.

2. The flexible package according to claim 1 , wherein the package body further comprises a bottom film which is folded in half and inserted between the first and second side-surface films from a fold line side of the bottom film,
wherein the bottom film has a sealed peripheral portion and is formed such that the package body is made to stand by itself with the bottom film as a bottom surface,
the first and second side-surface films have a loop stiffness in a range of from 30 mN/25 mm (width) to 1300 mN/25 mm (width) in a direction corresponding to a vertical direction when the package body is made to stand by itself with the bottom film side as the bottom surface, and
the first and second side-surface films have a loop stiffness in a range of from 20 mN/25 mm (width) to 1200 mN/25 mm (width) in a direction corresponding to a horizontal direction when the flexible package is made to stand by itself.

3. The flexible package according to claim 2 , wherein the loop stiffness in the direction corresponding to the vertical direction is in a range of from 80 mN/25 mm (width) to 480 mN/25 mm (width).

4. The flexible package according to claim 3 , wherein the loop stiffness in the direction corresponding to the horizontal direction is in a range of from 80 mN/25 mm (width) to 550 mN/25 mm (width).

5. The flexible package according to claim 1 , wherein the non-sealed portion has an oxygen permeability equal to or lower than 30 cc/(m 2 ·day·atm) at 20° C. and 60% RH.

6. The flexible package according to claim 1 , wherein each of the side edge portions has a seal strength equal to or larger than 30 N/15 mm.

7. The flexible package according to claim 1 , wherein the package body is formed such that a distance from an upper end of the non-sealed portion to an upper end of the package body is equal to or smaller than 30% of a height of the package body.

8. The flexible package according to claim 1 , wherein the package body further comprises a cut guide portion formed in at least one of the side edge portions, the cut guide portion further comprises the slit, and the cut guide portion is extended to the gas injection portion to guide cutting of the first and second side-surface films along with the cut guide portion.

9. The flexible package according to claim 1 , wherein the gas has a specific heat at constant volume of 0.71 kJ/kg·deg or higher at 0° C. and 1 atm.

10. The flexible package according to claim 1 , wherein the gas includes carbon dioxide and nitrogen.

11. The flexible package according to claim 1 , wherein each of the first and second side-surface films and the bottom film has a layer structure of polyethylene terephthalate/aluminum/nylon/low-density polyethylene.

12. A flexible package, comprising:
a package body comprising a first side-surface film and a second side-surface film sealed in a peripheral portion such that a storage portion is formed in the package body,
wherein the package body has sealed portions formed in side edge portions such that a non-sealed portion is formed in at least one of the sealed portions,
the non-sealed portion has a gas injection portion containing a gas, and
the side edge portions comprise a first slit that extends in a direction towards the gas injection portion.

13. The flexible package according to claim 12 , wherein in the side edge portions, a cut guide portion to guide cutting of the first side-surface film and the second side-surface film is formed at a position so as to extend from the position to the gas injection portion, the cut guide portion comprising the first slit and the first slit extending in a top-bottom direction and penetrating the first side-surface film and the second side-surface film.

14. The flexible package according to claim 13 , wherein in at least one of the first side-surface film and the second side-surface film, an indication that indicates the position of the cut guide portion is provided on or near the cut guide portion.

15. The flexible package according to claim 13 , wherein the cut guide portion is a cross-shaped slit which is formed at a position within 15 mm upward from an upper end of the gas injection portion.

16. The flexible package according to claim 15 , wherein the cut guide portion comprises the first slit extending in a top-bottom direction, and a second slit extending in a left-right direction and penetrating the first side-surface film and the second side-surface film, and the first slit extending in the top-bottom direction and the second slit extending in a left-right direction each have a length not smaller than 1 mm.

17. The flexible package according to claim 12 , wherein the first slit extends towards the gas injection portion so that when the package is torn starting from the first slit in a direction towards the gas injection portion, gas contained in the gas injection portion is released.

Assignees

• Toppan Printing Co Ltd

Inventors

• Araki Jun
• Yanagiuchi Motoo
• Sasaki Noriyuki
• Yajima Shunsuke
• Goto Masashi

Classifications

• B31B70/844

  Applying rigid valves, spouts, or filling tubes · CPC title

• B65D75/008 Primary

  Standing pouches, i.e. "Standbeutel" · CPC title

• B65D33/02 Primary

  Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames {(B65D33/007 takes precedence)} · CPC title

• B65D75/525 Primary

  External rigid or semi-rigid supports · CPC title

• B65D75/5827

  Tear-lines provided in a wall portion (B65D75/5805, B65D75/5816 take precedence) · CPC title