JP2002002876A - Tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tank having a heat insulating layer good in heat insulating efficiency even if a container housing an article has any shape. SOLUTION: A thin heat insulating sheet 3 is bonded to at least one of the inner and outer walls of a container 2 constituting an article housing part. The heat insulating sheet 3 can be bonded after it is cut into an arbitrary shape and, even if the container housing an article has any shape, the tank having the heat insulating layer good in heat insulating efficiency can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank used for storing various articles such as foods and beverages.

[0002]

2. Description of the Related Art Usually, a tank for storing articles is
It is desirable to keep the inside of the container at a constant temperature and store the articles therein. In particular, the quality of freshness is very important for foods and beverages that are orally ingested, and in order to maintain this freshness, it is necessary to maintain a constant low temperature inside the tank. If the supply from the heat source is interrupted, a temperature gradient occurs and the temperature inside the container fluctuates.To prevent this, conventional tanks adopt a configuration that surrounds the container using heat insulating material such as urethane foam. ing. Thereby, when the outside air temperature is low, the decrease in the temperature inside the container is suppressed,
Conversely, when the outside air temperature is high, the rise in the temperature inside the container is suppressed.

[0003]

The amount of heat leakage in the above-mentioned conventional tank is determined by the temperature difference between the inside and outside of the container, the thickness of urethane foam as a heat insulating material, and the thermal conductivity. However, since the size and shape of the tank are various, it is not easy to form a heat insulating layer with urethane foam having no followability. In particular, it is almost impossible to attach urethane foam to a container of a tank having a non-planar part later.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heat insulating layer having good heat insulating efficiency regardless of the shape of a container for storing articles. It is an object of the present invention to provide a tank having:

[0005]

In order to achieve the above object, a tank according to the present invention is characterized in that a thin heat insulating sheet is adhered to at least one of an inner wall and an outer wall of a container constituting an article storage section. And

Further, in the tank having the above structure, the heat insulating sheet is characterized in that at least a part of the impregnating base material is impregnated with a resin composition containing hollow particles and / or air bubbles.

Further, in the tank having the above structure, the heat insulating sheet is characterized in that a coating layer is further laminated on the exposed surface side.

[0008]

1 to 4 are explanatory views showing an example of a tank according to the present invention.

FIG. 1 shows a gas tank 1 permanently installed mainly in a port. The gas tank 1 has a heat insulating sheet 3 attached to the entire inner wall of a container 2 filled with gas.
That is, the heat insulating sheet 3 is attached to the inner wall of the container 2 made of metal later using an adhesive. In order to keep the gas in the container safe for a long time regardless of the temperature of the outside air, the inside of the container is kept at a constant temperature by a heat exchanger. Can be suppressed.

FIG. 2 shows a milk tank installed on a ranch or the like. The milk tank 4 has a heat insulating sheet 6 attached to the entire inner wall of a stainless steel container 5 for storing milk. The freshly squeezed milk is put into the container and kept fresh until it is collected. However, since the rise in temperature inside the container due to the outside temperature is suppressed by the heat insulating sheet 6, heat exchange is performed. The power used for the vessel can be minimized.

FIG. 3 shows a liquid nitrogen tank which is permanently installed in a chemical factory or a laboratory. This nitrogen tank 7
Has a heat insulating sheet 9 adhered to the entire inner surface of the container 8 containing liquid nitrogen. The stored liquid nitrogen is maintained at a predetermined low temperature until it is used. However, since the temperature rise in the container due to the outside air temperature is suppressed by the heat insulating sheet 9, the power used for the heat exchanger can be minimized.

FIG. 4 is an explanatory view showing another example of the tank according to the present invention. FIG. 4 shows a liquor production and storage tank 10 used in a brewery, in which heat insulating sheets 12 and 13 are adhered to inner and outer walls of a container 11, respectively. Adjust the reaction rate during fermentation with a heat exchanger,
For long-term storage of alcoholic beverages, the heat insulating sheet 12,
13, the power required for temperature management can be minimized.

As shown in these examples, the heat insulating sheet may be stuck not only to the inner wall of the container constituting the article storage section but also to the outer wall as needed.

Next, the heat insulating sheet used in the present invention will be described.

FIG. 5 is a cross-sectional view illustrating an example of an impregnated heat insulating sheet. The heat insulating sheet 20 shown in FIG. 5 (A) is a polymer matrix 21 in which a resin composition containing hollow particles 22 is impregnated. The material 24 impregnated with the heat insulating sheet 20 shown in FIG.
The heat insulating sheet 20 shown in FIG. 5C is obtained by impregnating the impregnating base material 24 with the resin composition including the hollow particles 22 and the air bubbles 23 in the polymer matrix 21. The impregnated base material 24 is impregnated.

In the impregnation type, partial impregnation (impregnation to a part in the thickness direction) of one side of the impregnable base material 24 that does not reach the other surface is performed, and the vicinity of the other surface is not impregnated. May remain, and the adhesive easily penetrates into the unimpregnated portion, so that the adhesiveness can be improved.

The single type sheet made of a resin composition containing hollow particles and / or air bubbles is obtained by removing the impregnating substrate 24 from the impregnating type shown in FIG. The material obtained by removing the material 24 and laminating the base material on one side corresponds to a lamination type.

A form in which a coating layer is laminated on the heat insulating sheet 20 can also be adopted. 6A and 6B show an example in which a coating layer is laminated on the heat insulating sheet 20. FIG. 6A shows an example in which the coating layer 25 is laminated on one surface of the heat insulating sheet 20, and FIG. 20 shows an example in which a coating layer 25 is laminated on both surfaces of the substrate 20. By laminating the coating layer 25, the surface of the heat insulating sheet 20 is smoothed, the adhesive, coloring and printing are improved, and depending on the material, the strength of the heat insulating sheet surface is improved or the heat insulating property is improved. It is possible to suppress the hygroscopicity of the sheet.

The hollow particles include organic particles made of an acrylic resin such as acryl and acrylonitrile and synthetic resins such as polystyrene resin, and inorganic particles made mainly of silica and alumina. as,
Something like a volcanic shirasu balloon can also be used. Further, hydrophilic or hydrophobic hollow particles described later can also be used.

A microcapsule type foaming agent, which is a kind of a foaming agent for generating air bubbles, may be used which has been foamed in advance. Things can also be treated as hollow particles. Examples of foamed microcapsule-type foaming agents include hollow particles manufactured by Matsumoto Yushi Seiyaku Co., Ltd. (product number "F-8").
0ED "or" F-80E ") has a density of 0.0
Since it is as small as 2 g / cm ³ , it is effective in suppressing thermal conductivity, and is preferably used.

The generally available and usable particle diameter of hollow particles is in the range of 0.3 to 300 μm, and one or more of them are selected from these.

Although the hollow particles themselves are relatively strong, they can withstand external forces such as compression.
In particular, when dispersed in a synthetic resin emulsion-based coating composition, air bubbles easily enter the coating composition by a stirring operation.

Since air bubbles are useful for improving heat insulation, air bubbles are intentionally generated, or air bubbles are generated by using a chemical foaming agent of a microcapsule type or a decomposition type. Good. Insulation can be provided only by bubbles without hollow particles.

A heat insulating sheet is prepared and used by using either hollow particles or air bubbles, or a heat insulating sheet is prepared by using hollow particles and air bubbles dispersed in a synthetic resin coating composition. When used, the hollow particles and / or the collapse of the air bubbles tend to reduce the heat insulating property over time. Therefore, in order to improve the compression resistance of the heat insulating sheet, the following three types of hollow particles are selected. It is preferable to carry out in the following manner. (1) A blend of hollow particles having different particle sizes. (2) A blend of hydrophilic hollow particles with hydrophobic hollow particles. (3) Blend of hydrophilic hollow particles and hydrophobic hollow particles having different particle diameters.

In order to fill small hollow particles between large hollow particles in the blend of hollow particles having different particle diameters in the above (1), the diameter a of the large hollow particles and the diameter b of the small hollow particles are required. Is b ≧ a (2−3 ^1/2 ) / 3
It is ^1/2 , and when this is calculated, b ≧ 0.155a. In the case of body-centered cubic, which is the sparsest filling, b
= A (2-2 ^1/2) / 2 ^1/2, is calculated this, it is b = 0.414a. Therefore, 0.155
a ≦ b ≦ 0.414a, and the diameter b of the hollow particles to be blended with the hollow particles having the diameter a is defined.

Incidentally, in the case of the densest hexagonal close packing,
In order for the hollow particles having the diameter b to just enter the gaps of the hollow particles having the diameter a without any gap, b = 2a (11/3)
^1/2 / 3, calculating this, b = 0.277a
It is.

As described above, the available particle diameter of the hollow particles is in the range of 0.3 to 300 μm, and a combination of large and small hollow particles satisfying the above relationship is selected from these. use.

In the above, the relationship between the number N (a) of particles per unit of the hollow particles having the diameter a and the number N (b) of the voids accommodated by the hollow particles having the diameter b is as follows.
(B) / N (a) = 8: 6. In the case of body-centered cubic, N
(B) / N (a) = 4: 2. To sort this out,
1/2 ≦ N (a) / N (b) ≦ 3/4, and the weight ratio at the time of blending the hollow particles of each diameter is determined by the number of hollow particles after determining the degree of packing density. The ratio is determined by calculation from the specific gravity and particle size of each hollow particle.

The heat insulating sheet prepared by blending the hollow particles having different particle diameters in the above (1) under such conditions and dispersing in a polymer matrix has a small diameter in a portion having bubbles. Since the hollow particles having the larger diameter are filled between the hollow particles having the larger diameter and reinforced, the compression resistance is enhanced and the structure is less likely to be crushed.

In the blend of the hydrophilic hollow particles and the hydrophobic hollow particles of the above (2), since the hydrophobic hollow particles have higher hydrophilicity with air, they are contained in the coating composition during dispersion. The entrapped air bubbles are surrounded by hydrophobic hollow particles to form secondary particles having a hydrophobic outside, and the heat insulating sheet is dispersed between the hydrophilic hollow particles and the hydrophilic resin.

Here, the hydrophilic hollow particles are made of a material
It is made of glass, silica, silica-alumina, ceramic, shirasu, hollow plastic, hollow fiber, or the like, and as the hydrophobic hollow particles, those obtained by subjecting these hydrophilic particles to a hydrophobic treatment are used. is there. The mixing ratio between the hydrophilic hollow particles and the hydrophobic hollow particles is determined by calculation from the size of the bubbles to be formed, the particle diameter of each hollow particle, and the specific gravity.

The blend of the hydrophilic hollow particles having different particle diameters and the hydrophobic hollow particles of the above (3) is a combination of the means of the above-mentioned methods (1) and (2), A heat insulating sheet having a structure having air bubbles between hollow particles in which conductive particles and hollow particles having a large particle diameter are mixed is obtained.
In this method, since hydrophobic particles having a small particle size are filled between hollow particles having a large particle size, the walls of bubbles formed between the hollow particles are strengthened, and a heat insulating sheet having a structure that is not easily crushed is obtained. Can be

As the polymer matrix, the following resins can be used. For example, nitrocellulose,
Cellulose acetate, cellulose butyl acetate, ethyl cellulose, polyamide resin, chlorinated rubber, cyclized rubber, polyamide resin, polyvinyl chloride resin, vinyl chloride / vinyl acetate copolymer resin, ethylene / vinyl acetate copolymer resin, chlorinated polypropylene, or acrylic Organic solvent solution of thermoplastic resin such as resin, urea resin, melamine resin, phenol resin, resorcinol resin, furan resin, epoxy resin, unsaturated polyester resin, polyurethane resin, polyimide, polyamide imide, polybenzimidazole,
It is a thermosetting resin such as polybenzothiazole or a polyurethane resin, and these resins can be a resin solution dissolved in water or an organic solvent.

Alternatively, a styrene malee resin, polyvinyl acetate resin, acrylic resin, or urethane emulsion, or natural rubber, recycled rubber, styrene-butadiene rubber, acrylonitrile-butadiene rubber, chloroprene rubber, butyl rubber, polysulfide rubber , Silicone rubber, polyurethane rubber, stereo rubber (synthetic natural rubber), ethylene propylene rubber, or block copolymer rubber (SBS, SIS, SEBS)
And the like, and these resins can be used as an organic solvent solution or a latex.

In order to form bubbles, a gas, particularly an inert gas, preferably a gas having a low thermal conductivity, is mechanically incorporated into a coating composition, impregnated into an impregnable base material, and foamed by heating. In some cases, a chemical foaming agent comprising an organic compound as described below is blended into a coating composition, impregnated, and foamed by heating.

In general, the term “blowing agent” generally refers to a chemical foaming agent of a decomposable type or the like. Available.

Examples of the chemical foaming agent include azidicarbonamide, avizosisobutyronitrile, barium azodicarboxylate, or an azimic foaming agent such as p-toluenesulfonyl semicarbazide; benzenesulfonyl hydrazide; p-toluenesulfonyl hydrazide; Examples include sulfonyl hydrazide such as 4,4'-oxybisbenzenesulfonyl hydrazide, nitroso such as dinitrosopentamethylenetetramine, sodium bicarbonate, and ammonium bicarbonate.

From the viewpoint of the action of the foaming agent, a microcapsule type foaming agent having a low boiling point hydrocarbon such as isobutane or neopentane in an outer wall made of acrylonitrile resin or the like is similar to a mechanical gas bubble. Suitable for foaming at relatively low temperatures. When a chemical foaming agent is used, a foaming aid for lowering the foaming temperature to facilitate foaming may be used, if necessary. Examples of such microcapsule type foaming agents include foaming agents manufactured by Matsumoto Yushi Seiyaku Co., Ltd. (product numbers “F-46” and “F-5”).
0 "," F-55 "," F-80 ", or" F-8 "
5 ") can be used, and these have a foaming ratio of 20 times or more, and are preferable.

When the coating composition using these foaming agents is applied or impregnated onto an impregnable substrate and foamed by heating, the thickness is preferably 0.1 to 100 times the film thickness after drying. Preferably, when the ratio is less than 0.1 times, the effect of improving the heat insulating property by foaming is poor, and when it exceeds 100 times, although the heat insulating property is provided, the compressive strength is lowered and the material is easily crushed.

As the impregnating base material, felts, nonwoven fabrics, cloths made from fibers such as natural fibers, synthetic fibers, rock wool, glass fibers, carbon fibers and the like, or papers made using these fibers as raw materials Paper (especially low-density paper) or a sheet such as a ceramic sheet,
One of these single-layer sheets, two of the same
A composite sheet of the same kind of sheets, in which two or more sheets are laminated, or a composite sheet of different kinds of sheets, in which two or more arbitrary different sheets selected from these sheets are laminated, can be used. One side may be a sheet having no or poor impregnation, for example, a low moisture permeable sheet or the like may be laminated. The low moisture permeable sheet may be a decorative sheet provided with a design property, and this decorative sheet may be a single layer or a laminate composed of two or more layers.

Originally, felt was obtained by collecting animal hair, entangled by pressurizing while heating and humidifying, and forming a sheet. However, at present, synthetic fibers, rock wool, carbon Fibers are also used. Non-woven fabric
Fibers (natural fibers are also treated, but usually synthetic fibers) are directly spun without mechanical spinning by mechanical, thermal, or chemical means into sheets. The paper is manufactured by entanglement of plant fibers and other fibers and agglutination (as defined by JIS).

As is clear from these definitions,
Felts, nonwovens, and paper, while seemingly different from each other in typical products, are essentially indistinguishable from each other. Are different in that

As papers, thin paper, kraft paper, titanium paper, resin-impregnated paper, linter paper, paperboard, gypsum board base paper, Japanese paper, and the like can also be used. More preferred ultra-low density paper is
Density 0.1 to 0.5 g / cm ³ is common, is of the order of 0.2 g / cm ³ as an example.

When felt, non-woven fabric and cloth are included, the density is 0.01 to 1 g / cm ³ , preferably 0.1 to 1 g / cm ³ .
02 to 0.5 g / cm ³ , more preferably 0.02 to 0.5 g / cm ³
0.25 g / cm ³ . If it is less than the lower limit, the strength will be low, and the risk of damage during handling will increase. If it exceeds the upper limit, the heat insulation will be insufficient.

As for the fabric, a fiber using a heat insulating fiber such as a hollow fiber is preferable as the fiber. However, even if a normal fiber which is not a heat insulating fiber such as a hollow fiber is used, a fiber having a small basis weight can be used. Any coarse cloth can be used.

Ceramics are mainly used as a heat insulating material in a high temperature region where heat resistance is required. Usually, the ceramic used here is a sintered compact having low thermal conductivity such as calcium silicate. A ceramic sheet is a sheet made by processing such ceramics into a fibrous shape.
Products of various thicknesses are also commercially available. The density of the ceramic sheet is preferably 0.8 to 2.3 g / cm ³ , and the thickness thereof is preferably about 0.2 to 5.0 mm.

In the above, the fibers are cotton,
Hemp, or natural fiber such as wool alone or two or more different, or synthetic fiber such as rayon, nylon, polyester, or acrylic alone or two or more different, rock wool, glass fiber, carbon fiber,
Potassium titanate fiber, alumina fiber, silica fiber or the like can be used. In the case of paper, vegetable fiber pulp is mainly used. The material constituting the ceramic sheet is not limited to silicate, which is a ceramic in a narrow sense, and alumina, silica, or zirconia alone or two or more different materials can be used.

In order to manufacture a heat insulating sheet using the above materials, a resin constituting a polymer matrix,
Preferably an aqueous solution of the resin, or an organic solvent solution,
Alternatively, the emulsion is mixed with hollow particles and / or a foaming agent, and various additives that can be blended as necessary, to prepare a coating composition and form a sheet. As a method for forming a sheet, a casting method in which the composition is applied to a peelable substrate and then dried and then peeled off, a method in which the composition is applied to the substrate to form a product with the substrate adhered, a method in which the impregnable substrate is impregnated and dried, and the like are used. .

The impregnation can be carried out by a method of dipping the impregnating substrate in a tank filled with the impregnating coating composition (so-called dipping), or by using a known coating means from one or both sides of the impregnating substrate. Apply. After the impregnating paint has sufficiently penetrated, the excess impregnating paint is scraped off by a suitable scraping device or a removing device, for example, a suction doctor, a doctor roll, or a wire bar having a round rod wound with a wire. Alternatively, the impregnating base material is impregnated with a predetermined amount of the impregnating paint by removing the impregnating paint. Thereafter, by drying, a heat insulating sheet is obtained.

By adjusting the viscosity of the impregnating coating composition and the time from application to drying, a portion of the thickness can be impregnated. In this case, the unimpregnated portion of the other surface can be used. In addition, the adhesive can be penetrated to improve the adhesiveness.

Depending on the material constituting the impregnating coating composition, particularly the material of the polymer matrix, the material is once dried at a relatively low temperature and then dried at a relatively high temperature, or a part or all of the drying is performed. The irradiation may be performed by ultraviolet irradiation or electron beam irradiation.

The heat-insulating sheet (including the composite having a coating layer) can exhibit heat-insulating properties as it is, but is used for a long time or in a part where people or objects are likely to come into contact. Has a low strength, and there is a lot of risk that the heat insulating material may be damaged, stained, or absorb moisture to deteriorate the heat insulating property. For this reason, it is preferable to coat one or both surfaces of the heat-insulating sheet with another appropriate sheet for coating. Specifically, it is preferable to use a low moisture-permeable sheet that does not allow moisture to pass through. The low moisture permeable sheet may be a decorative sheet provided with a design property.

FIGS. 7 and 8 are explanatory views showing examples in which a low moisture-permeable sheet is laminated on a heat-insulating sheet which is previously coated on one or both sides with a coating layer.

FIG. 7A shows an example in which one surface of the heat insulating sheet 20 is covered with the covering layer 25 and the low moisture permeable sheet 26 is laminated on the side not covered with the covering layer 25. This structure is suitable for the case where the covering layer 25 is laminated as a base material when the heat insulating sheet 20 is manufactured, and the covering layer 25 can also have low moisture permeability. Of course, depending on the application, the low moisture permeable sheet 26 may be laminated on one side of the coating layer 25 so that one surface of the heat insulating sheet 20 can be exposed without the coating layer.

FIG. 7B shows an example in which a low moisture permeable sheet 26 is laminated on both sides of a heat insulating sheet 20 one side of which is covered with a coating layer 25. This structure is suitable for the case where the coating layer 25 is laminated as a base material when the heat insulating sheet 20 is manufactured, and when the coating layer 25 is not sufficient in strength and moisture absorption. .

FIG. 8A shows an example in which a low moisture permeable sheet 26 is laminated on one side of a heat insulating sheet 20 covered on both sides with a coating layer 25. FIG. 8B shows an example in which a low moisture permeable sheet 26 is laminated on both surfaces of the heat insulating sheet 20 whose both surfaces are covered with the coating layer 25.

When a low moisture permeable sheet is laminated on both sides of the heat insulating sheet, the ends of the low moisture permeable sheet are heat-sealed or adhered to each other to form the heat insulating sheet into two low moisture permeable sheets. It is preferable that the sealing be performed in order to prevent moisture from entering from the end face. In this case, the coating layer can be substituted for one of the low moisture permeable sheets.

The low-moisture-permeable sheet suppresses or substantially eliminates moisture permeation to the adjacent heat-insulating sheet, and prevents the heat-insulating sheet from absorbing heat and the like, so that the heat-insulating property is not reduced. Things.

The lamination of the low moisture permeable sheet and the heat insulating sheet is performed by using an adhesive or by heat sealing. However, when the low-moisture-permeable sheet is disposed on both the front and back surfaces of the heat-insulating sheet and the end faces of the low-moisture-permeable sheet are sealed, the low-moisture-permeable sheet and the heat-insulating sheet may not be bonded.

In general, even if a low moisture permeable sheet is laminated, the end face of the heat insulating sheet is exposed to the air. Therefore, when moisture absorption from the end face becomes a problem, a resin paint is applied to the end face. Alternatively, the material may be sealed by melting the material with a flame.

As a material of the low moisture permeable sheet, for example,
Plastic films are preferred, and plastics include polyethylene resin, polypropylene resin, polymethylpentene resin, polyvinyl chloride resin, polyvinylidene chloride resin, polyvinyl alcohol resin, and vinyl chloride resin.
Vinyl acetate copolymer resin, ethylene-vinyl acetate copolymer resin, ethylene-vinyl alcohol copolymer resin, polyethylene terephthalate resin, polybutylene terephthalate resin, polyethylene naphthalate-isophthalate copolymer resin, polymethyl methacrylate resin, polymethacrylic Ethyl acid resin, polybutyl acrylate resin, nylon 6
Or a polyamide resin such as nylon 66, cellulose triacetate resin, cellophane, polystyrene resin, polycarbonate resin, polyarylate resin, or polyimide resin.

On the low moisture permeable sheet, another paint prepared using a resin binder such as polyvinylidene chloride resin having low moisture permeability is applied, or a thin film of metal or metal oxide is formed to reduce gas permeation. It is better to suppress it. In these metal thin films, a mixture of metal oxides having different oxidation numbers such as silicon monoxide and silicon dioxide,
A mixture of a silicon compound and an aluminum oxide may be used, or a mixture of an organic group mainly composed of an inorganic oxide may be used.

As a method of forming a thin film, for example, a vacuum vapor deposition method such as an ion beam method or an electron beam method, a physical vapor deposition method such as a sputtering method, a plasma chemical vapor deposition method, or a thermal chemical vapor deposition method Or a chemical vapor deposition method such as a photochemical vapor deposition method.

The thickness of the thin film is preferably 50 to 300
0 °, more preferably 100 to 1000 °. If it is less than 50 °, there is almost no effect of suppressing gas permeation, and if it exceeds 3000 °, cracks may occur in the thin film and gas permeability may be reduced, and the material cost is relatively high. Although it is slightly disadvantageous from the viewpoint of thermal conductivity, from the viewpoint of preventing the heat insulating sheet from absorbing moisture,
It is also possible to replace the low-humidity sheet by laminating a metal foil or forming a coating film of a paint using a resin similar to the synthetic resin constituting the above-mentioned synthetic resin sheet as a binder.

Basically, the heat insulating sheet only needs to have the above-mentioned elements. However, considering that the bacterium is liable to proliferate in the moisture-absorbed state and easily fall into an unsanitary state, foods, beverages and the like are considered. When used in a tank for storing what is to be taken orally, it is preferable to apply an antibacterial agent. Antibacterial agents include antibacterial metallic materials such as silver, copper, zinc, tin, lead, bismuth, cadmium, chromium, or mercury, zeolite, activated carbon, silica, activated clay, acid clay, alumina, activated bauxite, bone charcoal, molecular Desirably, the carrier is supported on a carrier such as a sieve or a glass bead, but the antibacterial material, the type of the carrier, and the amount used thereof are not particularly limited. The antibacterial agent may be applied by applying it to the surface or blending it with the resin composition constituting the heat insulating sheet.

[0066]

Since the present invention is configured as described above, the following effects can be obtained.

The tank according to the first aspect of the present invention is characterized in that a thin heat insulating sheet is adhered to at least one of the inner wall and the outer wall of the container constituting the article storage portion. It can be cut into an arbitrary shape and then pasted, and therefore, regardless of the shape of the container for storing the article, a product having a heat insulating layer with good heat insulating efficiency can be provided.

The container according to the second aspect of the present invention comprises:
The tank according to claim 1, wherein the heat-insulating sheet is obtained by impregnating at least a part of the impregnating base material with a resin composition containing hollow particles and / or air bubbles. In addition, the heat insulating sheet is reinforced by the impregnating base material, so that the effect of the heat insulating sheet can be maintained for a long time.

The container according to the third aspect of the present invention comprises:
The tank according to claim 2, wherein the heat-insulating sheet is further characterized in that a coating layer is further laminated on the exposed surface side, so that in addition to the above-mentioned effects, the applied heat-insulating sheet is durable and durable. Can be high.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of a tank according to the present invention.

FIG. 2 is an explanatory diagram showing an example of a tank according to the present invention.

FIG. 3 is an explanatory view showing an example of a tank according to the present invention.

FIG. 4 is an explanatory view showing an example of a tank according to the present invention.

FIG. 5 is a sectional view of a heat insulating sheet.

FIG. 6 is a cross-sectional view of a heat insulating sheet on which a coating layer is laminated.

FIG. 7 is a cross-sectional view showing an example in which a low moisture-permeable sheet is laminated on a heat-insulating sheet having one surface covered with a coating layer.

FIG. 8 is a cross-sectional view showing an example in which a low moisture permeable sheet is laminated on a heat insulating sheet having one surface covered with a coating layer.

[Explanation of symbols]

 Reference Signs List 1 gas tank 2 container 3 heat insulating sheet 4 milk tank 5 container 6 heat insulating sheet 7 nitrogen tank 8 container 9 heat insulating sheet 10 liquor production and storage tank 11 container 12, 13 heat insulating sheet 20 heat insulating sheet 21 polymer matrix 22 Hollow particles 23 Bubbles 24 Impregnating base material 25 Coating layer 26 Low moisture permeable sheet

Claims (3)

[Claims] 1. A tank characterized in that a thin heat insulating sheet is adhered to at least one of an inner wall and an outer wall of a container constituting an article storage section. 2. The tank according to claim 1, wherein the heat insulating sheet is obtained by impregnating at least a part of an impregnating base material with a resin composition containing hollow particles and / or air bubbles. 3. The tank according to claim 2, wherein the heat-insulating sheet further has a coating layer laminated on the exposed surface side.