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-se
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.
대표청구항▼
1. A flexible package, comprising: a first side-surface film, a second side-surface film, and a bottom film which are joined together, the bottom film being inserted 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, wi
1. A flexible package, comprising: a first side-surface film, a second side-surface film, and a bottom film which are joined together, the bottom film being inserted 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, with a predetermined insertion length; anda storage part formed by sealing peripheral portions of the films, the storage part having a lower bottom surface which is the bottom film,whereinon one or both of two side edge portions which are sealed regions of the peripheral portions at both side ends of the first side-surface film and the second side-surface film, a non-sealed region is provided which is surrounded by the sealed regions of the first side-surface film and the second side-surface film and is not sealed over a predetermined length,in the non-sealed region, a gas injection portion is formed so as to contain a gas whose specific heat at constant volume is 0.67 kJ/kg·deg or higher at 0° C. and 1 atm,the gas injection portion has a diameter not smaller than 3 mm but not larger than 50 mm,a repelling force, measured when the 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 the width of the nipped gas injection portion becomes half the diameter of the gas injection portion, is not smaller than 7 N but not larger than 30 N at 23° C. and 1 atm,the non-sealed region has an oxygen permeability equal to or lower than 30 cc/(m2·day·atm) at 20° C. and 60% RH,the side edge portions each have a seal strength equal to or larger than 30 N/15 mm,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), anda 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). 2. The flexible package according to claim 1, 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 near the gas injection portion so as to extend 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. 3. The flexible package according to claim 2, 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. 4. The flexible package according to claim 2, 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 is composed of 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 not smaller than 1 mm. 5. 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. 6. A flexible package, comprising: a first side-surface film, a second side-surface film, and a bottom film which are joined together, the bottom film being inserted 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, with a predetermined insertion length; anda storage part formed by sealing peripheral portions of the films, the storage part having a lower bottom surface which is the bottom film,whereinon one or both of two side edge portions which are sealed regions of the peripheral portions at both side ends of the first side-surface film and the second side-surface film, a non-sealed region is provided which is surrounded by the sealed regions of the first side-surface film and the second side-surface film and is not sealed over a predetermined length,in the non-sealed region, a gas injection portion is formed so as to contain a gas whose specific heat at constant volume is 0.67 kJ/kg·deg or higher at 0° C. and 1 atm,the gas injection portion has a diameter not smaller than 3 mm but not larger than 50 mm, anda repelling force, measured when the 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 the diameter of the gas injection portion, is not smaller than 7 N but not larger than 30 N at 23° C. and 1 atm. 7. The flexible package according to claim 6, 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 near the gas injection portion so as to extend 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. 8. The flexible package according to claim 7, 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. 9. The flexible package according to claim 7, 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 is composed of 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 not smaller than 1 mm. 10. The flexible package according to claim 6, further comprising: a sealed spout sandwiched between the first side-surface film and the second side-surface film.
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이 특허에 인용된 특허 (6)
Carbonneau Alan J., Electrostatic discharge protection bag.
Takagaki Tadao (Tokyo JPX) Hirose Shizuo (Tokyo JPX) Tonouchi Ikuo (Tokyo JPX), Self-supporting bag, a method of production thereof and an apparatus for production thereof.
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