JPH06171673A - Insulating bag for keeping coldness - Google Patents

Abstract

PURPOSE:To prevent the occurrence of over-cooling and perform cooling operation for a long time by a method wherein a gas layer is formed between ice lumps at the interior and the outer surface of a bag, in a cold insulating bag used as an ice bag for transport and storage of fresh fishes. CONSTITUTION:A gap 6 is formed between inner and outer bags 1 and 2 formed of a plastic film material. The inner bag 2 is sealed with a high molecular absorbent 12 mixed with water and brought into a gelled state, and water is introduced from the outside through a flat tubular water injection valve 13. A small container 21 to generate gas and a small bag 22 are sealed in the gap 6. After water is injected in the inner bag 1 and a gelled content is frozen in a freezer, the small container 21 is unsealed from the outside to generate gas.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cold bag containing a polymer absorbent, which is used as an ice sac, or when transporting or temporarily storing fresh fish or raw meat at a low temperature.

[0002]

2. Description of the Related Art Cooling bags in which a polymeric absorbent is enclosed inside a bag formed of a plastic film bag material are known. The bag is provided with a flat tube-shaped water injection valve, and when water is injected from the outside through the water injection valve, the polymer absorbent mixes with water and changes into a gel. The contents are frozen in a freezer and used for transportation or temporary storage of ice sac or fresh fish.

[0003]

In the conventional cold-insulating bag, the ice blocks, which are the contents, come into direct contact with the affected area or fresh fish through one thin plastic film material, so that they are cooled rapidly. There are problems such as overcooling and short cooling time. An object of the present invention is to appropriately cool an affected part or fresh fish by forming a gas layer between an internal ice block and an outer surface in contact with fresh fish, etc., while maintaining the cooling state depending on a required time. To get a cool bag. Another object of the present invention is to form the outer bag separately from the inner bag so that the bag can be repeatedly used.

[0004]

The cold-insulating bag of the present invention has a space 6 between an inner bag 1 and an outer bag 2 made of a plastic film bag material, and the inner bag 1 is mixed with water. While enclosing the polymer absorbent 12 that turns into a gel,
Water can be injected from the outside through a flat tubular water injection valve 13 provided on the bag mouth side 5, and gas is generated by mixing with each other inside the void 6 to cause a chemical reaction 2 The seed substances 19 and 20 are enclosed, and at least one of the two substances 19 and 20 is a small container 21.
It is a requirement that the small container 21 is provided with an opening part 25 that can be opened from the outside of the outer bag 2.

As another means for forming a gas layer in the space 6, a flat tube-shaped air-injection valve 26 is provided on the bag mouth side 5, and the outside of the outer bag 2 is introduced through the air-injection valve 26. Gas may be introduced into the void 6. The outer bag 2 is doubled, and a space 6 that is in communication with the outside through the air injection valve 26 and a storage space 30 that communicates with the outside through the bag mouth 29 are provided inside the outer bag 2. The inner bag 1 can be inserted into or removed from the storage space 30. The outer bag 2 can be reused by discharging the gas in the space 6 through the air injection valve 26.

[0006]

[Function] When water is injected into the inner bag 1 through the water injection valve 13,
Since the polymer absorbent 12 is mixed with water and changes into a gel, it is frozen in a freezer to form an ice block 31. When two kinds of substances 19 and 20 that generate gas are enclosed in the space 6, if the opening portion 25 is grasped and opened from the outside of the outer bag 2 together with the outer bag 2, the substance 19 and other substances that come out of the small container 21 The substance 20 of the above mixes with each other to cause a chemical reaction to generate a gas,
A gas layer is formed in the void 6 and the outer bag 2 swells. If the outer bag 2 is provided with an air injection valve 26, the air injection valve 2
Gas is introduced into the void 6 from the outside via 6 to form a gas layer. The gas layer formed between the inner bag 1 and the outer bag 2 acts as a heat insulating layer, so that the cold air on the inner bag 1 side is gradually transmitted to the outer bag 2 side, but from the outer bag 2 side to the inner bag 2 side. Suppresses heat transfer to the 1 side. Moreover, when transporting fresh fish and the like, the gas layer also has an action of absorbing shock.

[0007]

According to the present invention, since a gas layer is formed between the inner bag 1 and the outer bag 2 in which the ice blocks 31 are formed,
The ice blocks 31 inside are less likely to melt, and the cold air on the inner bag 1 side can be constantly transmitted to the outer bag 2 side for a long time. Therefore, when it is used as an ice bag, or when it is used for transportation or temporary storage of fresh fish, the affected part or the fresh fish can be cooled at an appropriate temperature depending on the time required. Since the gas layer in the outer bag 2 absorbs the impact when the fresh fish or the like is transported, it is possible to prevent the fresh fish or the like from colliding and being damaged. Since the inner bag 1 can be inserted into or taken out of the outer bag 2 and the gas can be freely introduced into or discharged from the outer bag 2, the outer bag 2 can be used repeatedly.

[0008]

1 to 5 show an embodiment of a cold insulating bag according to the present invention. FIG. 1 shows a state before use, which is composed of inner and outer double bags 1 and 2. This inner and outer double bag 1
・ 2 is a double bag in which two rectangular plastic films are stacked, the two films are folded in the center in the length direction, and both sides 3 and 4 and the bag mouth side 5 are heat-sealed. . A space 6 is formed between the front sides of the inner bag 1 and the outer bag 2, and a space 6 is formed between the back sides thereof. Since the bottoms of the inner bag 1 and the outer bag 2 are not heat-sealed, the voids 6, 6 on the front and back sides thereof communicate with each other on the bottom side.

As shown in the enlarged view in FIG. 3, the plastic film, which is the material for each of the inner bag 1 and the outer bag 2, comprises a nylon film 9 for supporting strength and a polyethylene film 10 for supporting heat fusion. The outer bag 1 is heat-sealed with the polyethylene film 10 on the inner surface side and the inner bag 1 with the polyethylene film 10 on the outer surface side. The air in the inner bag 1 and the outer bag 2 is degassed at the time of heat sealing.

As shown in FIG. 1, the inner bag 1 is filled with a powdery polymer absorbent 12 which changes into a gel when mixed with water, and also has a flat tubular water injection valve 13. It is provided. The water injection valve 13 is a sheet formed by flatly bending a plastic film tube, one end of the bag mouth side 5 is exposed to the outside, the other end is inserted into the inner bag 1, and the outer surface thereof is formed. Only one is welded and fixed to the bag mouth side 5. Since the seal drop printing 14 (see FIG. 3) is applied to the inner surface of the water injection valve 13, the inner surface is not welded during heat sealing. Therefore, water can be injected from the water injection valve 13 into the inner bag 1. Water injection valve 13 after water injection
Since the portion of the inner bag 1 is crushed by the internal pressure and adheres closely, the water in the inner bag 1 does not leak from the water injection valve 13.

As shown in FIG. 2, the outer bag 2 is provided with an air vent hole 16 for venting the gas in the void 6 at the time of disposal, and the air vent hole 16 is closed with a tape 17.

In the void 6, two kinds of substances 1 which generate a gas (inert gas) by being mixed with each other and chemically reacting with each other.
9 and 20 (see FIG. 5) are separately held before use. For example, when carbon dioxide gas is generated, one substance 19 is an aqueous solution containing tartaric acid, citric acid, malic acid, or the like, and is sealed in a small amount in a small container 21, and the other substance 20 is sodium hydrogen carbonate. The powder is packed in a small bag 22 in a predetermined amount.

In FIG. 5, the small container 21 is made of a soft tube or the like, and the bottom end thereof is squeezed so that the contents can be squeezed out from the mouth 23. It has an opening portion 25 having a dangerous cross-section portion 24 that is easy to grasp and break together with the bag 2. The small bag 22 is made of a breathable material such as a non-woven fabric that allows carbon dioxide gas to easily permeate to the outside, and is attached to the small container 21 so as to surround the opening portion 25. The small container 21 and the small bag 22 are put in before the inner bag 1 and the outer bag are heat-sealed.

Before use, the cold-insulating bag manufactured in this manner is flatly folded and stored or transported while the polymer absorbent 12 and the small container 21 are separately stored therein.
When water is injected into the inner bag 1 through the water injection valve 13 at the time of use, the polymer absorbent 12 is mixed with water and changes into a gel, which is frozen in the freezer to form the ice block 31. Next, when the unsealed portion 25 of the small container 21 is grasped and broken from the outside of the outer bag 2 together with the outer bag 2, an aqueous solution 19 of tartaric acid, citric acid or malic acid comes out from the small container 21 and a powder of sodium hydrogencarbonate 20. It mixes with and causes a chemical reaction to generate carbon dioxide. This gas permeates the pouch 22 and fills the voids 6 to form a gas layer and inflate the outer bag 2.

Since the gas layer acts as a heat insulating layer, it prevents the internal ice blocks 31 from being melted at an early stage, and at the same time, the cold air in the inner bag 1 side is gradually transferred to the outer bag 2 side. Therefore, when used as an ice sac, it is possible to prevent the affected part from being overcooled, and at the same time, it is possible to continue cooling the affected part at an appropriate temperature. Even when fresh fish, raw meat, etc. are transported or temporarily stored, they can be prevented from being overcooled and can be appropriately cooled over the required time. In this case, since the gas layer in the outer bag 2 absorbs the shock, damage to fresh fish and the like can be well prevented. After use, the tape 17 adhered to the surface of the outer bag 2 can be peeled off and the gas inside can be released, so that it can be discarded in a compact state.

The cold insulation bag shown in FIG. 6 is provided with a flat tube-shaped air injection valve 26 on the bag mouth side 5 of the outer bag 2, and a tube 27 is inserted into the air injection valve 26 to fill the space 6 inside. It is a model that blows in gas. The cold insulation bag shown in FIGS. 7 and 8 has a space 6 inside the outer bag 2 and a storage space 30 communicating with the outside through a bag mouth 29. The inner bag 1 can be inserted or taken out. An air injection valve 26 is provided on the bag mouth side 5, and gas can be introduced into the space 6 through the air injection valve 26. Since the gas in the space 6 can be discharged by opening the air injection valve 26, it can be used compactly after use, and can be used repeatedly by newly facilitating the inner bag 1.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cold insulating bag before use.

FIG. 2 is an external perspective view of the cold insulating bag when in use.

3 is a cross-sectional view taken along the line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is a cross-sectional view of a small container and a pouch.

FIG. 6 is a cross-sectional view of a cold insulating bag according to another embodiment.

FIG. 7 is a cross-sectional view of a cold insulating bag according to still another embodiment.

8 is an external perspective view of the cold insulating bag in FIG.

[Explanation of symbols]

 1 Inner bag 2 Outer bag 6 Void 12 Polymer absorbent 13 Water injection valve 21 Small container 22 Small bag 26 Air injection valve

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yu Okamoto 26 Ujii-cho, Kashiwara, Nishikyo-ku, Kyoto City, Kyoto Prefecture (72) Inventor Katsu Uei, No. 103, Kita Juso 103, Gosho City, Nara Prefecture Tatsuta Gosei Industrial Co., Ltd.

Claims (3)

[Claims] 1. The inner and outer double bags 1 and 2 are made of a plastic film bag material, and a gap 6 is formed between the inner bag 1 and the outer bag 2. The inner bag 1 is mixed with water. Then, the polymer absorbent 12 that changes into a gel state is enclosed, and water can be injected from the outside through the flat tube-shaped water injection valve 13 provided on the bag mouth side 5. Two kinds of substances 19, 20 that generate gas by mixing with each other and causing a chemical reaction are enclosed inside, and at least one of the two kinds of substances 19, 20 is enclosed in a small container 21. In addition, the small bag 21 is provided with an opening part 25 that can be opened from the outside of the outer bag 2, and is a cold bag. 2. The inner and outer double bags 1 and 2 are made of a plastic film bag material, and a gap 6 is formed between the inner bag 1 and the outer bag 2. The inner bag 1 is mixed with water. Then, the polymer absorbent 12 that changes into a gel state is enclosed, and water can be injected from the outside through the flat tube-shaped water injection valve 13 provided on the bag mouth side 5. A cold insulation bag into which gas can be introduced from the outside through a flat tubular air injection valve 26 provided on the bag mouth side 5. 3. An inner bag 1 and a double outer bag 2 formed of a plastic film bag material, wherein the inner bag 1 absorbs a polymer that changes into a gel when mixed with water. While the agent 12 is enclosed, water can be injected from the outside through a flat tube-shaped water injection valve 13 provided on the bag mouth side 5, and a sealed space 6 is formed in the outer bag 2. A storage space 30 communicating with the outside through the bag mouth 29 is formed, and the inner bag 1 can be inserted into or taken out from the bag mouth 29 in the storage space 30. A cold bag in which gas can be introduced from the outside through a flat tubular air injection valve 26 provided in 5.