Toppan Printing Co., Ltd.

Motoo Yanagiuchi

Jun Araki

Masashi Goto

Noriyuki Sasaki

Shunsuke Yajima

Tohru Yoshikane

Seiki Miyoshi

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&#xb7;deg or higher at 0&#xb0; 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&#xb0; 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.

Flexible package

A pouch in which an air layer can be formed with a simple mechanism using a single-tube air nozzle is provided. A pouch includes, in a side edge portion where a first and a second side-surface films are sealed, a non-sealed region which is not sealed over a predetermined length, and an opening provided near an upper end of the non-sealed region penetrating through the first and/or the second side-surface films. The non-sealed region includes an air filling portion which takes therein, through the opening, air from an air blowout hole of an air nozzle having a tip surface in a predetermined distance from the opening. The air filling portion is not sealed within a predetermined radius larger than a radius of the air nozzle such that, when the air filling portion expands due to increase of internal pressure, a part near the opening is adhered to the tip surface.

Self-standing pouch

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&#xb7;deg or higher at 0&#xb0; 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&#xb0; 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.

Growing community of inventors

Tokyo, Japan

Motoo Yanagiuchi