JPH0629641Y2 - Cool storage agent - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cold storage agent used as a cold storage agent for an ice pillow or an ice box.

(Prior Art) Conventionally, a cold storage agent used as a cold storage agent for an ice pillow or an ice box is a flexible bag body 12 made of plastic, like the cold storage agent 10 shown in the sectional view of FIG. Alternatively, a heat storage medium for cold storage 14 is filled in a rigid plastic container (not shown), and the heat medium for cold storage 14 is stored in a refrigerator or the like.
Used after cooling.

(Problems to be solved by the invention) However, when the cold storage agent 10 is used, the water in the air adheres to the surface of the bag body 12 or the container as water droplets (condensation), which may cause adverse effects such as deterioration by the water. For those who receive it, there is a problem that it cannot be used.

Therefore, this invention is intended to solve the problem of dew condensation on the surface of the conventional regenerator.

(Means for Solving the Problems) This invention relates to a cold storage agent in which a heat storage medium for cold storage is housed in a flexible bag or a rigid container, and a starch material partially cross-linked to a cloth material is modified. It is characterized in that the bag or container is covered with a water-absorbing material having a water-absorbing polymer made of a polymer attached thereto. (Operation) In use, water in the air that solidifies and adheres to the surface of the regenerator as water drops is absorbed in the water-absorbing polymer of the water absorbent on the surface of the regenerator, and does not exist as water drops on the surface of the regenerator . Moreover, since the water-absorbent polymer composed of a partially cross-linked starch-modified polymer has a significantly higher water absorbency than a cloth material such as a non-woven fabric, it immediately absorbs water droplets on the surface of the cool storage agent.

(Embodiment) The present invention will be described below based on an embodiment with reference to the drawings.

FIG. 1 is a sectional view showing a cold storage agent 16 according to an embodiment of the present invention. In the illustrated cold storage agent 16, a heat storage medium 20 for cold storage is housed in a flexible bag body 18, and the outer surface of the bag body 18 is covered with a water absorbing material 22.

The bag body 18 is made of an impermeable film or sheet. As the impermeable film or sheet constituting the bag body 18, a plastic such as polyethylene or a metal such as an aluminum foil may be used, but among them, a plastic film or a plastic sheet is preferable in view of moldability and rust. preferable. Depending on the use of the cold storage agent, a hollow container having high rigidity formed by blow molding hard plastic or the like may be used instead of the illustrated flexible bag body 18.

As the heat storage medium 20 for cold storage, an aqueous solution of an inorganic salt such as sodium chloride, ammonium chloride, magnesium chloride, or an aqueous solution of alcohol such as methanol or ethanol is used.

The water absorbent material 22 is a cloth material to which a water absorbent polymer is attached. The cloth material is for holding the water-absorbing polymer,
Although various materials can be used, it is preferable to use a nonwoven fabric obtained by joining synthetic fibers or natural fibers with an adhesive or the fusion force of the fibers themselves from the viewpoint of durability and the like. Then, the water-absorbent polymer adheres between the fibers of the cloth material, and the water-absorbent polymer is sandwiched by the fibers of the cloth material. Disappear.

Further, as the water-absorbing polymer, a partially cross-linked starch-modified polymer, for example, acrylonitrile, acrylamide, acrylic ester, vinyl acetate, etc. powders are used as the monomers and copolymers of the graft copolymer with starch. The cloth material is adhered to the cloth material by impregnating the cloth material with the aqueous solution and drying.

Next, a manufacturing example of the cold storage agent 16 will be described. First, a plastic film is attached to the back surface of the water absorbent material 22 by an adhesive or heat welding to form a laminated material, two sheets of the laminated material are stacked with the plastic film facing inward, and the periphery 26 is heat welded. To form a bag. At that time, an opening (not shown) for injecting the heat medium for cold storage is provided in a part of the periphery 26.
Leave. Then, the heat storage medium 20 for cold storage is bagged from the opening.
The desired regenerator 16 is obtained by injecting it into 18 and then sealing the opening by heat welding or the like.

As another manufacturing example, there is also a method of injecting a heat medium for cold storage into a hollow container formed by blow molding or the like and then bonding a water absorbing material to the outer surface of the container.

(Effect of the device) Since the surface of the cool storage agent of the present invention is covered with the water absorbing material in which the water absorbing polymer is adhered to the cloth material, the moisture in the air is condensed and adheres to the surface of the cool storing agent as water droplets. However, the water droplets are immediately absorbed by the water-absorbing polymer on the surface and do not exist on the surface of the regenerator. Therefore, even if something that is altered by moisture contacts the surface of the regenerator, there is no water droplet on the surface of the regenerator, so that it is unlikely to be affected by moisture and there is an effect that the alteration can be prevented.

As described above, the regenerator of the present invention can be used even for those that are adversely affected by moisture, and has a wide range of uses, and thus has high practical value.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional example. 18: Bag, 20: Heat medium for cold storage, 22: Water absorbing material

Claims (1)

[Scope of utility model registration request] 1. A cold storage agent comprising a heat storage medium for cold storage contained in a flexible bag or a rigid container, wherein the outer surface of the bag or container is partially cross-linked with a cloth material. A regenerator characterized by being covered with a water-absorbing material to which a water-absorbing polymer composed of a modified polymer is attached.