Flexible package

Patent metadata

Field	Value
Publication number	US-2016288977-A1
Application number	US-201615184745-A
Country	US
Kind code	A1
Filing date	Jun 16, 2016
Priority date	Jan 25, 2013
Publication date	Oct 6, 2016
Grant date	—

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 method of making a flexible package, comprising:
joining together a first side-surface film, a second side-surface film, and a bottom film; inserting the bottom film between the first side-surface film and the second side-surface film so as to be folded in half and inserted from a fold line side; sealing peripheral portions of the films to form a storage part, the storage part having a lower bottom surface which is the bottom film; forming a first non-sealed region separate from the storage part, the first non-sealed region surrounded by sealed side edge regions of the first side-surface film and the second side-surface film; forming a gas injection portion in the first non-sealed region; and evaluating the gas injection portion by:
nipping an entirety of the gas injection portion from a first side-surface film side and a second side-surface film side;
squeezing an entirety of the gas injection portion until a width of the nipped gas injection portion becomes half a diameter of the gas injection portion;
measuring a repelling force of the entirety of the gas injection portion at 23° C. and 1 atm; and
determining whether the repelling force is between 4 N and 30 N.

2 . The method of making a flexible package of claim 1 , further comprising:
injecting a gas in the gas injection portion where the gas has a specific heat at constant volume of 0.67 kJ/kg·deg or higher at 0° C. and 1 atm.

3 . The method of making a flexible package of claim 1 , wherein the gas injection portion has a diameter between 3 mm and 50 mm.

4 . The method of making a flexible package of claim 1 , wherein the non-sealed region has an oxygen permeability equal to or lower than 30 cc/(m2·day·atm) at 20° C. and 60% relative humidity.

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

6 . The method of making a flexible package of claim 1 , wherein a first 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).

7 . The method of making a flexible package of claim 6 , wherein a second 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).

8 . The method of making a flexible package of claim 7 , wherein the first and second loop stiffnesses are different.

9 . The method of making a flexible package of claim 1 , further comprising:
forming in the side edge portions a cut guide portion to guide cutting of the first side-surface film and the second side-surface film at a position near the gas injection portion so as to extend from a 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.

10 . The method of making a flexible package of claim 9 , further comprising:
forming 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 on or near the cut guide portion.

11 . The method of making a flexible package of claim 9 , further comprising:
forming the cut guide portion in a cross-shaped slit at a position within 15 mm upward from an upper end of the gas injection portion.

12 . The method of making a flexible package of claim 11 , wherein the cross-shaped slit 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 having a length not smaller than 1 mm.

13 . The method of making a flexible package of claim 1 , further comprising:
forming a sealed spout sandwiched between the first side-surface film and the second side-surface film.

14 . The method of making a flexible package of claim 1 , further comprising:
forming a second non-sealed region separate from the storage part, the second non-sealed region surrounded by sealed regions of the first side-surface film and the second side-surface film.

15 . A method of making a flexible package, comprising:
joining together a first side-surface film, a second side-surface film, and a bottom film; sealing peripheral portions of the films to form a storage part, the storage part having a lower bottom surface which is the bottom film; forming a first non-sealed region separate from the storage part, the first non-sealed region surrounded by sealed side edge regions of the first side-surface film and the second side-surface film; forming a gas injection portion in the first non-sealed region; and evaluating the gas injection portion by:
nipping an entirety of the gas injection portion from a first side-surface film side and a second side-surface film side;
squeezing an entirety of the gas injection portion until a width of the nipped gas injection portion becomes half a diameter of the gas injection portion;
measuring a repelling force of the entirety of the gas injection portion; and
determining whether the repelling force is between 4 N and 30 N.

16 . The method of making a flexible package of claim 15 , further comprising:
forming in the side edge portions, a cut guide portion at a position near 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.

17 . The method of making a flexible package of claim 16 , further comprising:
forming 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 on or near the cut guide portion.

18 . The method of making a flexible package of claim 16 , further comprising:
forming the cut guide portion in a cross-shaped slit at a position within 15 mm upward from an upper end of the gas injection portion.

19 . The method of making a flexible package of claim 18 , wherein the cross-shaped slit 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 having a length not smaller than 1 mm.

20 . The method of making a flexible package of claim 15 , further comprising:
forming 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

• 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

• G01N7/00

  Analysing materials by measuring the pressure or volume of a gas or vapour · CPC title

• B65D75/30

  Articles or materials enclosed between two opposed sheets or blanks having their margins united, e.g. by pressure-sensitive adhesive, crimping, heat-sealing, or welding · CPC title

• B31B70/84

  Forming or attaching means for filling or dispensing contents, e.g. valves or spouts · CPC title