JPH0543775Y2 - - Google Patents

Description

[Detailed explanation of the idea]

【0001】

[Industrial Application Field] This invention relates to cold insulation materials. More specifically, this invention relates to a cold insulating material used as a cold compress as a medical aid and for keeping food cold.

【0002】

[Prior Art] Recently, as an alternative to conventional ice and dry ice, cold storage materials containing synthetic cold storage agents packed in plastic bags have been developed, and more recently, various cold storage materials using super absorbent polymers have been developed. (For example, Utility Model Application No. 62-101521,
JP-A No. 1-95264, Utility Model Application No. 2-149220, etc.). All of these bags contain a highly water-absorbent polymer in a bag made of a plastic sheet or a water-absorbing sheet such as paper or cloth, and the structure or shape of the bag is devised. However, each of these cold insulation materials has its advantages and disadvantages, and when used as a medical aid, etc., there are the following problems.

【0003】

[Problems to be solved by the invention] In other words, 1. When the bag containing the superabsorbent polymer is swollen, it becomes a bale-like shape, making it difficult to treat the curved surface to be cooled, especially as a medical aid. Unable to make proper contact with the area. 2. If the surface is a water-permeable sheet, the polymer gel that swells upon absorbing water, especially its soluble content, gradually seeps out onto the surface and becomes sticky. 3. Bags whose surface is made of plastic that comes into contact with the surface to be cooled give a feeling of discomfort to the skin when used as a cold compress, etc. 4. If the surface of the bag is made of plastic, water droplets will form on the surface due to condensation when the bag is frozen and used. When the surface material is made of a sheet with good water permeability such as synthetic paper or nonwoven fabric, there is a drawback that water during thawing becomes water droplets and runs down the skin surface. 5. When the bag is made of materials with heat sheet properties such as synthetic fiber paper and non-woven fabric, the melting point of these materials is low, so the periphery, that is, the heat sheet part, is easily damaged, and the inner pressure of the gel inside is likely to damage the bag. There is a risk of gel leaking from the heat sheet part.

[0004] The purpose of this invention is to solve the above-mentioned problems and provide a cold insulating material that properly contacts the surface to be cooled, has a non-sticky surface, and does not feel uncomfortable when in contact with the skin.

【0005】

[Means for solving the problem] In order to achieve the above-mentioned purpose, the cold insulating material of the present invention is a bag made by heat-sealing the periphery of a sheet of nonwoven fabric laminated with high-density synthetic fiber paper and a cotton cloth serving as the surface layer. It is characterized by a sheet-like structure in which small sheet-like pieces made by interspersing fine powder of a super absorbent polymer between two sheets of thin paper and pressing them together are enclosed in the body.

【0006】

[Function] When the bag is brought into contact with water in the cold insulating material constructed in this way, the super absorbent polymer contained therein absorbs the permeating water, swells, and becomes a gel. The gelled polymer is retained in the bag while retaining a large amount of water, and the cotton cloth on the surface prevents the gel from seeping out of the bag, allowing only water to vaporize, and the heat of vaporization causes it to last for a long time. A cooling effect can be obtained.

[0007]

[Example] Next, a specific example of implementing this invention will be described with reference to the drawings. The state of the invented cold insulating material before use is shown in Figure 1, which is an extremely thin and light sheet with a thickness of approximately 0.5 mm. Super absorbent polymer fine powder 3 is scattered between two sheets of thin paper 4, embossed and pressed onto the surface, and sealed in the bag 1 as a thin sheet-like piece 2. Since this sheet-like piece 2 is used in this invention, it can contain a particularly large amount of polymer fine powder, so it is sufficient that it is small enough to occupy a part of the bag body 1.

[0008] The bag body 1 is made of a laminated sheet of a nonwoven fabric 5 made of fused fibers with a low melting point that have water permeability (no water retention) and high density synthetic fiber paper 6.
It is formed by placing the nonwoven fabric 5 on the inside (the side of the sheet-like small piece 2), covering the outside with cotton cloth 7 that has a high water retention capacity and made of cotton, which is a natural fiber with a high melting point, and heat-sealing the peripheral edge 8. be done. Sheet-like pieces 2 and nonwoven fabric 5 containing super absorbent polymer
and a sheet laminated with high-density synthetic paper 6,
Further, there is a space between the laminated sheets 5, 6 and the cotton cloth 7 forming the surface layer.

[0009] The bag 1 is interconnected vertically and horizontally, horizontally, or vertically in a single row by the fused peripheral edge 8, and the one shown in FIG. It is possible to keep cold objects with a large size. The vertical and horizontal dimensions of one bag 1 are, for example, 7.5 cm x
The sheet-shaped piece 2 containing the superabsorbent polymer to be encapsulated is 3.7 cm x 2 cm, and the width of the peripheral portion 8, that is, the heat-sealed portion, is 6 mm.

[0010] The above-mentioned peripheral portion 8 is made of nonwoven fabric 5 and synthetic fiber paper 6.
When heat-sealing a chisel, when used as described later, part of the gel that has swollen after absorbing water may seep out from the peripheral edge 8, that is, the connecting part, and that part may stretch or break. It was necessary to widen the width of the peripheral edge 8 to about 1 cm.

[0011] Since the cold insulation material of the present invention has the cotton cloth 7 overlapping the entire surface including the peripheral edge 8, the cotton cloth 7 catches the exuding gel and does not let it out. The cotton cloth 7 forming the surface of the bag 1 is a surface layer that plays an important role in relation to the nonwoven fabric 5 and the synthetic paper 6, which are intermediate layers, when heat-sealed.

[0012] That is, when the bag body 1 has a cotton cloth 7 on its surface and a laminated layer of nonwoven fabric 5 and synthetic fiber paper 6 on the inside, heat sealing is performed at a temperature close to the melting point of the nonwoven fabric 5 and the synthetic paper 6. The synthetic fiber paper 6 is melted into a film and is reliably fused to the front and back cotton cloths 7 having a higher melting point. Therefore, it is possible to connect the bags 1 in which the width of the heat-sealed peripheral portion 8 is narrowed. The narrow width of the fused peripheral portion 8 has the advantage that the effective cooling area of the cold insulating material can be sufficiently wide.

[0013] When the cold insulating material of the present invention with the peripheral edge 8 of the bag body 1 sealed as described above is immersed in water, the heat-sealed nonwoven fabric 5 and synthetic fiber paper 6 of the peripheral edge 8 become a film and absorb water. Since it does not contain water, the peripheral edge 8 has a high sealing strength and will not break, and the peripheral edge 8 and the gel-containing portion containing a large amount of water are completely separated. Therefore, when used in a frozen state, the peripheral edge 8, which does not contain water, does not freeze, so the whole body does not solidify into a block like conventional commercially available cold insulation materials, and the frozen cold insulation material does not freeze at the sealing part. Some periphery 8
can be freely refracted.

[0014] Although FIG. 3 shows 18 bags 1 connected vertically and horizontally, depending on the part, area, etc. of the object to be cooled, for example, 3 bags in a vertical row, 6 bags in a horizontal row. It can be used by cutting it individually or in a series of 4 pieces, 2 each lengthwise and horizontally. It may also be provided in advance with a large area, and this may be cut into a desired size and shape as appropriate for use.

[0015] Examples of the superabsorbent polymer used include starch-polyacrylate crosslinked products,
Carboxymethylcellulose crosslinked products, saponified vinyl acetate-acrylic acid ester copolymers, polyacrylate crosslinked products, isobutylene-maleic acid copolymer systems, polyethylene oxy-based products, etc., all of which can be used in the cold insulation material of this invention. Can be done.

[0016] The thin paper 4 to which the super absorbent polymer fine powder 3 is sandwiched and pressed may be, for example, water-soluble paper such as carboxymethyl cellulose, carboxyethyl cellulose, and their salts, or hydrophilic cellulose paper.

[0017] As the nonwoven fabric 5 forming the bag body 1,
For example, rayon, nylon, polyester, acrylic, polypropylene, vinylon, polyethylene, polyurethane, cellulose, etc. can be used. It is desirable that the high-density synthetic fiber paper 6 to be laminated be insoluble in water, have water permeability, and be difficult to exude the polymer gel that has been swollen by water absorption.

[0018] Cotton cloth 7 forming the surface of the bag body 1
is one of the main constituent layers of this invention, and is an extremely soft cloth that is widely used as a medical aid. This cotton cloth 7 can be used without causing discomfort to the skin, and has the function of completely retaining the soluble content of the polymer gel exuding from the inside and preventing it from coming out to the surface. In addition, since the cotton cloth 7 has a fluffy surface, when it is immersed in water during use, it has high water absorption due to a noticeable capillary phenomenon, and is effective in promoting and averaging the gelation of super absorbent polymers.

[0019] Next, a method of using the cold insulating material according to the present invention will be explained. An appropriate number of bags 1 are immersed in cold water as a whole. At this time, if necessary, the bag bodies 1 may be folded at the connecting portion (periphery portion) 8 between them and immersed. Super absorbent polymer fine powder 3 enclosed in bag body 1
absorbs penetrating water, swells, and gels 21 within about 1 minute, resulting in the state shown in FIG. 2. Each swollen bag 1 is interconnected at a peripheral edge 8,
It is bendable as before water absorption. Remove it from the cold water, squeeze it lightly to remove the water on the surface, and then
(See Figure 4).

[0020] The polymer 21 that has absorbed water and turned into a gel is
Most of it is held by the nonwoven fabric 5 and the high-density synthetic paper 6. However, the soluble content of the gel oozes out, albeit in a small amount. This oozing amount is retained by the fluff portion on the inner surface of the cotton cloth 7 forming the surface of the bag body 1, and is prevented from oozing out to the surface.

[0021] The cold insulating material of the present invention can be used by being frozen in a swollen state after absorbing water. When frozen, the moisture seeping out onto the surface of the synthetic fiber paper 6 becomes fine ice crystals, but the cotton cloth 7 on the surface
After soaking in water, the water is absorbed by the super absorbent polymer fine powder 3 and the product is almost dry, so it does not freeze and can be used on the skin without causing discomfort. There is also almost no water seepage due to melting ice.

[0022] FIGS. 4 and 5 show a state in which the swollen or frozen cold insulating material is applied to the object 9 to be cooled, for example, the surface of a human body. Since there is a thin fused peripheral edge part 8 between adjacent bags 1, the peripheral edge part 8 can be bent freely as shown in the figure, and a large number of bags 1 can be arranged and the width of the peripheral edge part 8 can be narrowed. Together, they can be brought into contact very well. When the entire body is frozen, the peripheral edge 8 is not wet, that is, it does not freeze, as described above, so the upper bending freedom is not lost.

【0023】

[Effects of the invention] The following effects can be obtained from the cold insulation material according to the invention. 1.Uses the heat of vaporization of water or the heat of melting of ice, and does not use any chemicals, so there is no chemical damage. 2. It can be brought into proper contact even with objects to be cooled which have irregularly shaped surfaces. 3. A large number of connected bags can keep a wide area cold. 4. The surface of the cold insulation material is made of cotton cloth, so it does not feel uncomfortable when used on the human body, and has a good vaporization function. 5. The cotton cloth can almost completely prevent the gel of the superabsorbent polymer from seeping out, and the surface will not become sticky. 6 After use, it can be easily incinerated and disposed of.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of the main parts of the cold insulating material according to the present invention before use.

FIG. 2 is a longitudinal sectional front view of the main part in a swollen state.

FIG. 3 is a plan view of an embodiment of the cold insulation material according to the present invention.

FIG. 4 is a perspective view of the state of use on a wide curved surface.

FIG. 5 is a perspective view of the state in which it is used wrapped around an arm, leg, etc.

[Explanation of symbols]

1...Bag body 2...Sheet-like pieces containing super absorbent polymer 3...Super absorbent polymer fine powder 4...Thin paper 5...Nonwoven fabric 6... High-density synthetic paper 7...Cotton cloth 8...Heat-sealed peripheral edge 9... Cold insulated object 21...Gelified super absorbent polymer.

Claims (1)

[Scope of utility model registration request] Claim 1: Fine powder of a super absorbent polymer is placed between two sheets of thin paper in a bag made by heat-sealing the periphery of a sheet of nonwoven fabric laminated with high-density synthetic paper and a cotton cloth serving as the surface layer. A cold insulating material characterized by a series of sheet-like pieces in which small sheet-like pieces are scattered and crimped together.