Flexible package

Patent metadata

Field	Value
Publication number	US-10287079-B2
Application number	US-201615184745-A
Country	US
Kind code	B2
Filing date	Jun 16, 2016
Priority date	Jan 25, 2013
Publication date	May 14, 2019
Grant date	May 14, 2019

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. 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 of from 3 to 50 mm and is formed such that a repelling force is from 4 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 first side-surface film;
a second side-surface film;
a bottom film;
a storage part formed by sealing peripheral portions of the first side-surface film, second side-surface film, and bottom film;
a sealed region formed by sealed side peripheral portions of the first side-surface film and the second side-surface film;
a non-sealed region where the first side-surface film and the second side-surface film are not sealed to each other in the non-sealed region, the non-sealed region surrounded by the sealed region; and
a gas injection portion in the non-sealed region, the gas injection portion containing a gas,
wherein
the gas injection portion has a diameter not smaller than 3 mm but not larger than 50 mm, and
a repelling force measured when an entirety of the gas injection portion is nipped from a first side-surface film side and a second side-surface film side and squeezed until a width of the nipped gas injection portion becomes half a diameter of the gas injection portion, is not smaller than 7 N but not larger than 30 N at 23° C. and 1 atm.

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

3. The flexible package according to claim 1 , wherein
a loop stiffness of the first side-surface film and the second side-surface film in a direction corresponding to a vertical direction when the flexible package is made to stand by itself is not smaller than 30 mN/25 mm (width) but not larger than 1300 mN/25 mm (width), and
a loop stiffness of the first side-surface film and the second side-surface film in a direction corresponding to a horizontal direction when the flexible package is made to stand by itself, is not smaller than 20 mN/25 mm (width) but not larger than 1200 mN/25 mm (width).

4. The flexible package according to claim 1 , further comprising:
a cut guide portion in the side peripheral portions formed at a position to guide cutting from the position to the gas injection portion, the cut guide portion further comprising at least one slit extending in a top-bottom direction and penetrating the first side-surface film and the second side-surface film.

5. The flexible package according to claim 4 , 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.

6. The flexible package according to claim 4 , wherein
the cut guide portion is a cross-shaped slit formed at a position within 15 mm upward from an upper end of the gas injection portion, and comprises a slit extending in the top-bottom direction, and a slit extending in a left-right direction and penetrating the first side-surface film and the second side-surface film, and the slit extending in the top-bottom direction and the slit extending in a left-right direction each have a length ≥1 mm.

7. The flexible package according to claim 1 , further comprising:
a sealed spout sandwiched between the first side-surface film and the second side-surface film.

8. The flexible package according to claim 1 , wherein the gas has a specific heat at constant volume of 0.67 kJ/kg·deg or higher at 0° C. and 1 atm.

9. A flexible package, comprising:
a first side-surface film;
a second side-surface film;
a bottom film;
a storage part formed by sealing peripheral portions of the first side-surface film, second side-surface film, and bottom film;
a sealed region formed by sealed side peripheral portions of the first side-surface film and the second side-surface film;
a non-sealed region where the first side-surface film and the second side-surface film are not sealed to each other, the non-sealed region surrounded by the sealed region; and
a gas injection portion in the non-sealed region, the gas injection portion containing a gas,
wherein the non-sealed region has an oxygen permeability equal to or lower than 30 cc/(m 2 ·day·atm) at 20° C. and 60% RH.

10. The flexible package according to claim 9 , wherein the gas injection portion has a diameter not smaller than 3 mm but not larger than 50 mm, and
a repelling force measured when an entirety of the gas injection portion is nipped from a first side-surface film side and a second side-surface film side and squeezed until a width of the nipped gas injection portion becomes half a diameter of the gas injection portion, is not smaller than 7 N but not larger than 30 N at 23° C. and 1 atm.

11. The flexible package according to claim 9 , wherein the gas has a specific heat at constant volume of 0.67 kJ/kg·deg or higher at 0° C. and 1 atm.

12. The flexible package according to claim 9 , further comprising:
a cut guide portion in the side peripheral portions formed at a position to guide cutting from the position to the gas injection portion, the cut guide portion being at least one slit extending in a top-bottom direction and penetrating the first side-surface film and the second side-surface film.

13. The flexible package according to claim 12 , 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.

14. The flexible package according to claim 12 , 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, and comprising a slit extending in a top-bottom direction, and a slit extending in a left-right direction and penetrating the first side-surface film and the second side-surface film, and the slit extending in the top-bottom direction and the slit extending in a left-right direction each having a length ≥1 mm.

15. The flexible package according to claim 9 , further comprising:
a sealed spout sandwiched between the first side-surface film and the second side-surface film.

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

• B65D75/5883 Primary

  connected to the package at the sealed junction of two package walls · CPC title

• B65D75/525 Primary

  External rigid or semi-rigid supports · CPC title

• B65D33/02 Primary

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