JPH058977Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial field of application] The present invention has the following advantages:
The present invention relates to a cold storage pillow whose contact surface has elasticity, and more particularly to a cold storage pillow whose contact surface has a large contact area with the head and has a good feel when maintaining its cooling capacity.

The cold storage pillow of the present invention can be used for the same purpose as a regular pillow, but in addition to being used for medical purposes to cool the head during fever, it can also be used as a medical cold ship. You can also do it.

[Technical background and explanation of conventional technology]

"Cold storage" in this specification refers to cooling a cold storage pillow with a cooling source (for example, a freezer or a freezing room),
It stores cold heat (negative energy) in a cold storage material, and by storing cold, the cold storage pillow acquires the ability to cool the object it is trying to cool.

In this specification, "cooling" refers to cooling the object to be cooled (for example, the head) with a cold storage pillow and releasing cold heat (negative energy), and the cold storage pillow is cooled by cooling. Loses the ability to cool down the target.

In the present invention, the cold storage pillow is cooled by the cold storage in the cold storage pillow, but the object to be cooled (the head) is cooled by the cooling of the cold storage pillow, so the term "cooling" in this specification refers to must be mindful of the side being cooled.

In this specification, the "cold retention temperature" of a cold storage pillow, cold storage material, or liquid refers to the water or liquid contained in the hydrous gel of the cold storage material in the cold storage pillow when the cold storage pillow is cooled by a cooling source (that is, when cold storage is performed). This is the temperature at which water or liquid freezes and absorbs heat equivalent to the heat of fusion into the cooling source, that is, the freezing temperature of the water or liquid that is being cooled by the cold storage pillow. ) is the temperature at which it is cooled. In other words, when cooling an object with a cold storage pillow, the cold storage material in the cold storage pillow will melt the frozen water or liquid contained in the hydrogel and cool the object by an amount equivalent to the heat of fusion. take away from the intended object. This cold storage temperature is 0°C in the case of water, but in the case of aqueous salt solutions, etc.
It fluctuates depending on the freezing point drop.

When water (liquid) is cooled and transformed into ice (solid), it releases 80 calories/g of heat at 0°C under normal pressure, and when ice melts and transforms into water (liquid), Since it takes in the same amount of heat, water is 0
It is a cold storage material that has a cold storage temperature of ℃. When salts or other substances are dissolved in water, the aqueous solution -
The freezing temperature decreases (freezing point depression). Many of the cool storage materials known so far are water or salt aqueous solutions, but water or salt aqueous solutions are solid when cooled and liquid when left to cool, which is surprising. It is difficult to use.

Until now, it has been proposed to use a hydrogel obtained by reacting acrylamide with a crosslinking agent as a cold storage material (Patent Application No. 177394 of 1982, Patent Application No. 177395 of 1981), and these cold storage materials A composite cold storage material has been proposed that combines a cold storage material with a high cooling temperature and a cold storage material with a low cooling temperature by taking advantage of the material's property of not plastically deforming at temperatures around the cold storage temperature (utility model in 1982). Registration Application No. 15527). Furthermore, a bag body containing water is enclosed in an elastic gel having a cooling temperature lower than the cooling temperature of water, 0°C.
A soft cooling bag that is soft to the touch has been proposed (Utility Model Registration Application No. 7097, 1988).

The inventor continued his research and discovered that the pillow has a dent in the center when it is used, and that the dent stably holds the head in contact with the pillow. They realized that the contact area between the pillow and the head increases due to the indentation, and also realized that when the liquid is sealed in a bag, the feel is softer and better if the liquid is liquid. The present invention was arrived at based on this.

[Purpose and Summary of the Invention]

The purpose of the present invention is to provide a cold storage pillow that has a soft and good feel even at the cold storage temperature of the cold storage material, and more specifically, a cold storage pillow that has a soft and good feel and an excellent cooling effect even at the cold storage temperature of the cold storage material. It's about providing pillows.

The present invention provides a cold storage material having a property of not plastically deforming at temperatures before and after the cold storage temperature and having a recess 6 in the center of the space between the film 3 on the bottom surface of the bag and the partition film 5 of the bag. Enclose 1 and
The head 7 is shaped to be able to be held stably, and a liquid 2 having a cold storage temperature lower than that of the cold storage material 1 is provided in the space between the partition film 5 of the bag and the film 4 on the top surface of the bag. and head 7.
This cold storage pillow is characterized by having a soft and pleasant contact with the body and increasing its cooling efficiency.

In the cold storage pillow of the present invention, even if the cold storage material 1 is at the cold storage temperature and becomes hard, the cold storage material 1 is located on the top surface thereof, and is located between the top film 4 of the bag body and the partition film 5 of the bag body. Liquid 2 sealed in the space of
has a temperature higher than the cold storage temperature and is in liquid form, and the upper surface of the bag is soft and has a good feel. The upper surface of the head 7 can come into contact with the head 7, whereby the cold storage pillow can stably hold the head 7 and cool the head 7 more efficiently.

[Specific explanation of the idea]

FIG. 1 is a side view showing an internal cross section of the cold storage pillow of the present invention, and FIG. 2 is a side view showing an internal cross section of the cold storage pillow of the present invention in a state of use.

1 is a cold storage material that does not undergo plastic deformation at temperatures before and after the cold storage temperature; 2 is a cold storage material 1;
A liquid having a cold storage temperature lower than that of 3.
is a film on the bottom surface of the bag, 4 is a film on the top surface of the bag, 5 is a partition film of the bag, 6 is a recess in the center of the cold storage material 1, and 7 is a head.

Since the liquid 2 has a cold storage temperature lower than the cold storage temperature of the cold storage material 1 (a temperature corresponding to the melting point of the liquid), the cold storage material 1 is in a cold storage state (a state in which it can cool the object to be cooled). ), it remains in liquid form at a temperature higher than the cooling temperature of liquid 2, and as a matter of course, the cold storage material 1 is in the cooling state (no longer cooling the object to be cooled). Since it maintains a liquid state even when the bag is in a state where it cannot be used, it does not deform when it is enclosed in the space between the film 4 on the top surface of the bag and the partition film 5 of the bag. can.

The cold storage material 1, which has the property of not undergoing plastic deformation at temperatures before and after the cold storage temperature, is sealed in the space between the partition film 5 of the bag and the film 3 on the bottom surface of the bag. The cold storage material 1, which has the property of not undergoing plastic deformation, is in a cold storage state (a state in which the object to be cooled can be cooled and the cold storage material is hard) and in a cooling state ( When the object to be cooled can no longer be cooled, and the cold storage material is in the state of an elastic gel, it does not change its shape, and it remains the same before and after the cold storage temperature. The recess 6 provided in the center of the cold storage material 1, which has the property of not undergoing plastic deformation at a temperature of
Thereby, the head 7 can be held stably. That is, the liquid 2 sealed in the space between the film 4 on the top surface of the bag and the partition film 5 of the bag
can be deformed according to the shape of the recess 6 in the center of the cold storage material 1 and the shape of the head 7 placed on it, thereby making it possible to efficiently cool the head 7 and also Even if material 1 becomes hard,
The head 7 placed on it feels elastic and soft.

The films constituting the film 3 on the bottom surface of the bag, the film 4 on the top surface of the bag, and the partition film 5 of the bag may be any kind of film as long as it is water resistant and does not have high heat insulation properties. This can also be used for polyethylene film, polypropylene film, polyethylene terephthalate film, polyvinyl chloride film,
It is preferable to use materials that can be easily heat-sealed, such as polyvinylidene chloride film, polyacrylate film, and polymethacrylate film.

In these films, the transparent film makes it possible to visually confirm that the cold storage material 1, which has the property of not undergoing plastic deformation at temperatures before and after the cold storage temperature, is in the cold storage state when storing cold in the cold storage pillow of the present invention. This is preferably used where possible.

In the cold storage pillow of the present invention, the cold storage material 1, which is sealed in the space between the partition film 5 of the bag and the film 3 on the bottom surface of the bag and has the property of not undergoing plastic deformation at temperatures before and after the cold storage temperature, is made of A) acrylamide. or methacrylamide and an aqueous solution of a crosslinking monomer of N,N-methylenebisacrylamide or N,N-methylenebismethacrylamide with neutral salts such as sodium chloride, potassium chloride, ammonium chloride, calcium chloride, magnesium chloride, These nitrates or sulfates are added to a redox catalyst, a reducing agent such as ferrous sulfate or dithionite, and hydrogen peroxide,
A material gelled entirely by the addition of a peroxide such as benzoyl peroxide or peroxodisulfate;
Or B) a material obtained by adding polyacrylic acid to the above aqueous solution and adding a redox catalyst thereto to gel the entire material can be used.

Furthermore, the liquid 2 sealed in the space between the film 4 on the top surface of the bag and the partition film 5 of the bag may be of any kind, as long as its cold storage temperature is lower than that of the cold storage material 1. This can also be used with aqueous solutions such as sodium chloride, potassium chloride, ammonium chloride, calcium chloride, magnesium chloride, their nitrates or sulfates, ethylene glycol, diethylene glycol, propylene glycol, or glycerin. It is preferable to use the cold storage material 1, and its freezing temperature needs to be sufficiently lower than the cold storage temperature of the cold storage material 1, which has the property of not undergoing plastic deformation at temperatures around the cold storage temperature.

The cold storage pillow of the present invention has a film 4 on the top surface of the bag body,
The partition film 5 of the bag body and the film 3 on the bottom surface of the bag body are overlapped, and both side edges thereof are heat-sealed to form a cylinder body, and one end between the both side edges is heat-sealed to form a bag body. The liquid 2 is put into the space between the film 4 on the upper surface of the body and the partition film 5 of the bag, and the acrylamide or methacrylamide is poured into the space between the partition film 5 of the bag and the film 3 on the lower surface of the bag. , and an aqueous solution of a crosslinking monomer of N,N-methylenebisacrylamide or N,N-methylenebismethacrylamide to which the above-mentioned neutral salts and redox catalyst are added, and the other end of both sides of the aqueous solution is added. After heat-sealing, the whole is heated while pressing the mold necessary to form the recess 6, and the acrylamide or methacrylamide and N,N
- By conducting a polymerization reaction of an aqueous solution of a crosslinking monomer of methylenebisacrylamide or N,N-methylenebismethacrylamide to which the above-mentioned neutral salts and redox catalyst are added, and gelling the resulting solution. , can be produced.

In using the cold storage pillow of the present invention, the cold storage temperature of the cold storage material 1 is lower than the cold storage temperature of the cold storage material 1, which has the property of not plastically deforming at temperatures before and after the cold storage temperature. It is preferable to store the cold at a temperature higher than the cold storage temperature of the liquid 2, which has a cold storage temperature lower than that of the liquid 2, so that the cold storage pillow of the present invention can maintain a good elastic feel in its use. .

[Effect of idea]

The cold storage pillow of the present invention can maintain a good feel in the parts that come into contact with it during use.

In the cold storage pillow of the present invention, a recess 6 is provided in a refrigerant material 1 that does not undergo plastic deformation at temperatures around the cold storage temperature, and a bag body containing liquid 2 is placed on top of the recess 6, so that the head that comes in contact with the recess 6 is provided. The area of contact with the head 7 increases, thereby allowing the head 7 to be sufficiently cooled.

[Brief explanation of drawings]

FIG. 1 is a side view showing an internal cross section of the cold storage pillow of the present invention, and FIG. 2 is a side view showing an internal cross section of the cold storage pillow of the present invention in a state of use. Drawing code: 1... Cold storage material that does not undergo plastic deformation at temperatures before and after the cold storage temperature, 2...
A liquid having a cold storage temperature lower than that of the cold storage material 1, 3... Film on the bottom surface of the bag, 4... Film on the top surface of the bag, 5... Partition film of the bag,
6...The recess in the center of the cold storage material 1, 7...The head.

Claims (1)

[Scope of utility model registration request] In the space between the film on the bottom surface of the bag and the partition film of the bag, a cold storage material that does not undergo plastic deformation at temperatures around the cold storage temperature and has a recess in the center is sealed. A cold storage pillow characterized in that a space between a partition film and a film on the upper surface of a bag body is filled with a liquid having a cold storage temperature lower than that of a cold storage material.