JP2003128163A - Heat-insulated refrigerating container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat-insulated refrigerating container which can be manufactured without costing much and without requiring much time, having a superior heat-insulating effect even if thickness sizes of container main body and lid are not made large. SOLUTION: There is provide a heat-insulated refrigerating container 1A having a main body 2 of the container where an item storing section 6 is defined by a bottom wall 3 and circumferential walls 4, 5 extending upwardly form a circumferential wall of the bottom wall 3, and having a lid 9 capable of opening or closing an opening at a top part of the main body 2 of the container. The main body 2 of the container and the lid 9 is formed by mixture material having poliolefin thermoplastic synthetic resin of 25 to 80 wt.% and paper powder of 20 to 75 wt.% with a mean particle diameter of 30 to 80 μm.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to an adiabatic insulated container.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No. 2001-204345 discloses
A container main body in which an article storage portion is defined by a substantially rectangular bottom wall and a substantially rectangular side wall extending upward from a peripheral edge of the bottom wall, and a top opening of the container main body attached to the side wall of the container main body through a hinge. Disclosed is a heat insulation cold storage container having a lid that can be opened and closed. The container body and the lid have a three-layer structure formed of an inner wall and an outer wall made of polypropylene and a heat insulating material made of expanded polyurethane or expanded polystyrene interposed in a space between the inner and outer walls.

[0003]

The container disclosed in the above publication has a three-layer structure in which the container body and the lid have a heat insulating material interposed between the outer wall and the inner wall. Cannot be manufactured at once by injection molding, and it takes time and cost to manufacture the container. Moreover, in order to improve the heat insulating effect of this container, the thickness dimension of the heat insulating material must be increased. In this container, if the thickness of the heat insulating material is increased, the thickness of the container body and the lid are increased, and the container itself must be upsized in order to secure the volume of the article storage unit. At the time of discarding this container, if foamed polyurethane or polystyrene that serves as a heat insulating material is incinerated, soot may be generated, which may adversely affect the environment.

An object of the present invention is that it can be manufactured without cost and time, has an excellent heat insulating effect without increasing the thickness of the container body and the lid, and is environmentally friendly when incinerated. (EN) Provided is an insulated cool container which does not adversely affect.

[0005]

The premise of the present invention for solving the above-mentioned problems is to provide a container main body in which an article storage portion is defined by a bottom wall and a peripheral wall extending upward from a peripheral edge of the bottom wall, It is an adiabatic cold insulation container having a lid capable of opening and closing the top opening of the container body.

The feature of the present invention on the above-mentioned premise is that the container body and the lid are made of 25 to 80% by weight of a polyolefin thermoplastic synthetic resin and 20 to 75% by weight of an average particle diameter of 30 to 80 μm. It is formed from a mixture in which paper powder and heat are mixed, and in the mixture, the paper powder is substantially uniformly dispersed in the polyolefin synthetic resin.

As an example of an embodiment of the present invention, the average thickness dimension of the container body and the lid is 0.8 to 5.0.
The heat conductivity between the container body and the lid is in the range of 0.2 to 0.5 W / m · K.

As another example of the embodiment of the present invention,
A foam having a large number of bubbles inside is attached to at least the inner surface of the container body of the container body and the lid, and the foam body contains 20 to 40% by weight of the polyolefin-based synthetic resin. ˜60% by weight of the paper powder, 20˜30% by weight of the hydrophilic polymer, the polyolefin synthetic resin, the paper powder and the hydrophilic polymer are mixed in a high-temperature melt mixed under heating. It is formed from water and the weight ratio of the water to the high temperature melt is 10 to
In the range of 30% by weight, the water evaporates inside the high temperature melt to form a large number of bubbles inside the high temperature melt while expanding the high temperature melt to a given magnification, The hydrophilic polymer forms a film that encloses the bubbles.

As another example of the embodiment of the present invention,
The average thickness dimension of the foam is in the range of 1.0 to 10.0 mm, and the thermal conductivity of the foam is 0.035 to
It is in the range of 0.045 W / mK.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The details of the heat insulating and cold insulating container according to the present invention will be described below with reference to the accompanying drawings.

1 and 2 are a perspective view and a sectional view taken along the line AA of FIG. In FIG. 1, the horizontal direction is indicated by arrow X, the front-rear direction is indicated by arrow Y, and the vertical direction is indicated by arrow Z. In FIGS. 1 and 2, fresh food 12 and dry ice 13 indicated by a chain double-dashed line are stored in the article storage unit 6 of the container 1A.

The container 1A is composed of a container body 2 having a substantially rectangular parallelepiped shape that is long in the front-rear direction, and a lid 9 capable of opening and closing a top opening 8 of the container body 2. The container body 2 has a substantially rectangular bottom wall 3, first and second side walls 4 (peripheral walls) extending upward from both side edges (peripheral edges) of the bottom wall 3, and upward from both end edges (peripheral edges) of the bottom wall 3. It is formed of the extending third and fourth side walls 5 (peripheral wall). In the container body 2, the first and second
The side wall 4 has a substantially rectangular shape that is long in the front-rear direction,
The side wall 5 has a substantially rectangular shape that is long in the lateral direction. The container body 2 defines an article storage portion 6 surrounded by the bottom wall 3 and the side walls 4 and 5. In the container body 2, a flange 7 is provided from the tops of the side walls 4 and 5 outward in the circumferential direction of the container body 2.
Is extended. The lid 9 presents a substantially rectangular shape whose plane shape is long in the front-rear direction. In the lid 9, a flange 10 extends from the periphery of the lid 9 to the lower side of the container 1A, and a convex portion 11 extends from the vicinity of the inside of the flange to the lower side of the container 1A. In the container 1A, when the lid 9 closes the top opening 8 of the container body 2, the flange 7 of the container body 2 is fitted between the flange 10 and the convex portion 11 of the lid 9, so The lid 9 will not be displaced.

The container body 2 has an average thickness dimension L1 of the remaining portion excluding the flange 7 in the range of 0.8 to 5.0 mm. The lid 9 has an average thickness dimension L2 of the remaining portion excluding the flange 10 and the convex portion 11 in a range of 0.8 to 5.0 mm. The thermal conductivity of the container body 2 and the lid 9 is 0.
It is in the range of 2 to 0.5 W / m · K.

Average thickness L1 of the container body 2 and the lid 9
When L2 is less than 0.8 mm, the thermal conductivity of the container main body 2 and the lid 9 increases, and the thermal conductivity thereof exceeds the upper limit of the above range. In addition, the strength of the container body 2 and the lid 9 may decrease, and they may be easily damaged when an impact is applied to them. When the average thickness dimensions L1 and L2 of the container body 2 and the lid 9 exceed 5.0 mm, the thermal conductivity of the container body 2 and the lid 9 decreases, but in order to secure the volume of the article storage unit 6, the container 1A Becomes larger. Container body 2
When the thermal conductivity between the lid and the lid 9 exceeds 0.5 W / mK,
The heat of the outside air is easily transmitted to the storage section 6, and the freshness of the fresh food 12 stored in the storage section 6 cannot be maintained for a long time.

The shapes of the container body 2 and the lid 9 are not limited to those shown in the figures, and the container body 2 may be a cube, a cylinder with a bottom, or a polygonal cylinder with a bottom, and the lid 9 is a square. It may be a circle, a circle, or a polygon. Further, in the container 1A, the lid 9 may be attached to the container body 2 via a hinge, and the container body 2 and the lid 9 may be provided on the opposite side to which the hinge is attached.
Fixing means for fixing and may be attached.

The container body 2 and the lid 9 are formed of a mixture of thermoplastic polyolefin synthetic resin and paper powder which are heated. In the mixture, the paper powder is almost uniformly dispersed in the synthetic resin.

As the synthetic resin, either one of polypropylene and polyethylene, or a mixture of them at a given ratio can be used. As the polypropylene, at least one of block polymerized polypropylene, random polymerized polypropylene, homopolymerized polypropylene, metallocene-catalyzed polypropylene, and modified polypropylene can be used. As the polyethylene, at least one of low density polyethylene, linear low density polyethylene, medium density polyethylene, high density polyethylene, metallocene catalyst polyethylene, and modified polyethylene can be used.

The paper powder has a particle size in the range of 1 to 200 μm and an average particle size in the range of 30 to 80 μm. The paper powder can be produced by finely pulverizing the paper itself, or can be produced by finely pulverizing a broken paper or a broke generated when the paper is produced. The paper powder is preferably made of paper containing neither chlorine nor optical brightener.

Paper powder can also be made by finely pulverizing the pulp itself. As the paper powder made from pulp, it is preferable to use one having a lignin component of 1% or less. The pulp may be at least one of mechanical pulp, chemical mechanical pulp, semi-chemical pulp, and chemical pulp. As the pulp, it is preferable to use wood pulp, but it is also possible to mix at least one of rag pulp, stalk pulp and bast pulp with wood pulp. It is preferable to use pulp that contains neither chlorine nor optical brightener.

In order to manufacture the container body 2 and the lid 9, an injection molding technique can be used. A synthetic resin and paper powder are put into a hopper of an injection molding machine (not shown). Inside the injection molding machine, the synthetic resin and the paper powder are heated, and at the same time, they are kneaded through the screw of the injection molding machine to form a molten high-temperature mixture. In the mixture, the paper powder is almost uniformly dispersed in the synthetic resin. The mixture is poured into a mold through a nozzle formed at the tip of the injection molding machine, the mixture is cooled and solidified in the mold, and the container main body 2
And the lid 9 is molded. Further, the container body 2 can be manufactured by blow molding or inflation molding in addition to the injection molding technique.

The container body 2 and the lid 9 can also be manufactured by subjecting the mixture to secondary processing. For secondary processing,
Molding techniques such as vacuum molding, melt compression molding, and press molding can be used. The mixture for fabrication can be manufactured using an extruder (not shown). Synthetic resin and paper powder are put into the hopper of the extruder. Inside the extruder, the synthetic resin and the paper powder are heated, and at the same time, they are kneaded through the screw of the extruder to form a molten high-temperature mixture. The mixture is extruded through a die attached to the tip of the extruder. The mixture is formed into a pellet shape, a plate shape, or a sheet shape depending on the lip shape of the die.

In the mixture, the weight ratio of the synthetic resin to the total weight is in the range of 25% by weight to 80% by weight, and the weight ratio of the paper powder to the total weight is 20% by weight.
It is in the range of not less than 75% by weight. 25 synthetic resin
If the content is less than 75% by weight and the amount of paper powder exceeds 75% by weight, the paper powder that does not show fluidity even when heated will significantly reduce the fluidity of the mixture. When manufacturing 9, the mixture may not flow smoothly from the nozzle of the injection molding machine into the mold, or the mixture may easily cause a short mold in the mold, which may hinder the manufacturing thereof. In addition, the amount of paper powder in the mixture becomes unnecessarily large, and the strength of the container body 2 and the lid 9 is reduced and they are easily damaged. When the amount of the paper powder is less than 20% by weight and the amount of the synthetic resin exceeds 80% by weight, the amount of the mixture of the synthetic resin having a higher calorific value than that of the paper powder is increased, so that the container body 2 and the lid 9
It is not possible to reduce the calories burned during incineration. Moreover, they cannot be completely burned unless the incineration temperature is high.

When the average particle size of the paper powder is less than 30 μm, a plurality of steps are required to process the paper or pulp into the average particle size of less than 30 μm, which increases the production cost of the paper powder. As a result, the production cost of the container 1A also increases. If the average particle size of the paper powder exceeds 80 μm, the paper powder may cause poor dispersion in the synthetic resin and a lump of the paper powder may be formed in the mixture. In this case, the strength of the container body 2 and the lid 9 significantly decreases.

In the container 1A, since the container body 2 and the lid 9 can be manufactured by utilizing the molding technique, the manufacturing of the container 1A does not take cost or time. Container 1
The heat conductivity of the mixture forming A is lowered by the paper powder which is substantially uniformly dispersed in the synthetic resin. Therefore, container 1
In A, even though the average thickness dimensions L1 and L2 of the container body 2 and the lid 3 are in the range of 0.8 to 5.0 mm, the thermal conductivity of the container body 2 and the lid 9 is 0.2 to 0. It can be in the range of 5 W / m · K. Thus, the container 1A has excellent heat insulating properties and cold insulating properties, and in order to improve the heat insulating properties and cold insulating properties of the container 1A, the average thickness dimensions L1 and L2 of the container main body 2 and the lid 9 are required. There is no need to make it larger than that.

Since the container 1A is formed from a mixture of a polyolefin-based synthetic resin and paper powder, when the container 1A is incinerated as compared with the case where it is formed only from a thermoplastic synthetic resin. 1A at a lower incineration temperature that can reduce the calories burned in
Can be completely burned. Moreover, in the container 1A,
It is possible to suppress the generation of soot at the time of incineration, and there is no adverse effect on the environment.

In the container 1A, the synthetic resin forming the mixture may contain a modifying substance. In the mixture, the weight ratio of the modifying substance to the total weight of the synthetic resin is preferably 0.1% by weight or more and 20% by weight or less. The modifier has a melt flow index of 25-100.
It is in the range of g / 10 minutes. Less than 0.1% by weight of modifier and melt flow index of modifier of 25 g / 1
If it is less than 0 minutes, the modifier does not sufficiently function, and the fluidity of the mixture cannot be improved.

The modifier has a mutual affinity with the synthetic resin and can form a mixture with the synthetic resin to improve the fluidity of the synthetic resin. Further, the modifying substance functions as a binder for adhering the synthetic resin and the paper powder.

As the modifying substance, ethylene-propylene elastomer, hydrogenated styrene-butadiene rubber,
Styrene-ethylene butylene / olefin crystal block copolymer, metallocene polyethylene (C4, C6, C
8), at least one of which can be used.

Hydrogenated styrene-butadiene rubber and styrene-ethylene butylene / olefin crystal block copolymer, each of which is a highly random copolymer formed from ethylene and butene-1, and has a double bond in the polymer molecule. It is a thermoplastic polyolefin resin having no crystallinity, low crystallinity, flexibility and high transparency.

The mixture forming the container 1A may be mixed with at least one of starch and powdery inorganic substance. In the mixture, the weight ratio of starch to the total weight of paper powder is preferably in the range of 10% by weight or more and 25% by weight or less, and the average particle size of starch is 5 to 150 μm.
It is preferably in the range of. In the case of a mixture containing starch, the burning calories of starch are lower than that of paper powder, so that the burning calories of the container can be further reduced.

In the mixture, the weight ratio of the inorganic material to the total weight of the paper powder is preferably in the range of 1% by weight to 25% by weight. In the case of a mixture containing an inorganic substance, the inorganic substance is nonflammable, so that the calories burned in the container can be further reduced. As inorganic substances, titanium oxide, talc, calcium carbonate, calcium sulfate, barium sulfate,
At least one of kaolin can be used.

FIGS. 3 and 4 are a partially cutaway perspective view of an adiabatic heat insulation container 1B showing another embodiment and a sectional view taken along the line BB of FIG. In FIG. 3, the horizontal direction is indicated by arrow X, the front-rear direction is indicated by arrow Y, and the vertical direction is indicated by arrow Z. This container 1B
Is different from that of FIG. 1 in the following points.

On the inner surfaces of the container body 2 and the lid 9, the foam 1
4 is attached. The foam 14 is fixed to the inner surfaces of the bottom wall 3 and the first to fourth side walls 4 and 5 of the container body 2 and the inner surface of the lid 9 via an adhesive (not shown). The foam 14 has an average thickness L3 of 1.0 to 10.0 m.
m has a thermal conductivity of 0.035 to 0.04
It is in the range of 5 W / mK. The average thickness dimensions L1 and L2 of the container body 2 and the lid 9 and the thermal conductivity are the same as those in FIG.

The average thickness L3 of the foam 14 is 1.0 m
If it is less than m, the foam 14 is easily broken, and if the average thickness dimension L3 of the foam 14 exceeds 10.0 mm, the container 1B has to be upsized in order to secure the volume of the article storage unit 6. . The thermal conductivity of the foam 14 is 0.045 W / mK
If it exceeds, the heat insulating property and the cold insulating property of the container 1B cannot be improved.

The foam 14 is composed of a polyolefin-based synthetic resin, paper powder, a hydrophilic polymer, and water mixed in a high temperature melt obtained by mixing them with heating. Inside the foam 14, a large number of independent air bubbles 14a are formed. The bubbles 14a are not uniform in size, and extend discontinuously and irregularly in the lateral direction, the front-rear direction, and the thickness direction. Inside the foam 14, the hydrophilic polymer forms a film covering the bubbles 14a. The same polyolefin-based synthetic resin and paper powder as those shown in FIG. 1 are used.

As the hydrophilic polymer, at least one of a hydrophilic natural polymer and a hydrophilic synthetic polymer can be used. It is preferable to use starch for the hydrophilic natural polymer. At least one of polyvinyl alcohol, acrylate, and maleate can be used as the hydrophilic synthetic polymer. As the water, tap water can be used. The water is not particularly limited, and any of soft water, hard water, and pure water can be used.

The foam 14 can be produced by mixing a synthetic resin, paper powder and a hydrophilic natural polymer under heating and mixing water in a high temperature melt thereof. The foam 14 is manufactured using an extruder (not shown) and is extruded from a die attached to the tip of the extruder,
It is shaped like a plate.

A synthetic resin, paper powder and a hydrophilic polymer are charged into the hopper of the extruder. Inside the extruder, the synthetic resin, the paper powder, and the hydrophilic polymer are heated,
They are kneaded into a hot melt through the extruder screw. In the melt, the paper powder and the hydrophilic polymer are substantially uniformly dispersed in the synthetic resin.

Water contained in the tank flows into the extruder from the substantially central portion of the extruder. In the extruder, water is mixed in the melt, the temperature of the water instantly reaches the boiling point, and the water is vaporized, so that many bubbles 14a are formed inside the melt. Inside the extruder, the melt expands to a given magnification and the hydrophilic polymer forms a film that encloses the bubbles 14a inside the melt. After that, the melt is extruded from the die to manufacture the plate-shaped foam body 14. The expansion ratio of the melt is about 20 to 40 times per unit volume. Water is
In order to facilitate the vaporization, it is preferable to use hot water heated to the required temperature.

The weight ratio of the synthetic resin, the paper powder and the hydrophilic polymer in the foam 14 is 20% by weight or more and 40% by weight or less of synthetic resin, 40% by weight or more and 60% by weight or less of paper powder, and hydrophilic. Of the organic polymer in the range of 20% by weight to 30% by weight. The weight ratio of water to the melt obtained by mixing the synthetic resin, the paper powder and the hydrophilic polymer is 10% by weight.
It is in the range of not less than 30% by weight.

If the synthetic resin content is less than 20% by weight, the foaming inside the melt will be insufficient, and only a few bubbles 14a will be formed in the foam, and the hardness of the foam 14 will be high, so the cushion of the foam 14 will be high. Sex is significantly reduced. If the synthetic resin exceeds 40% by weight, the amount of the synthetic resin, which has a higher calorific value than the paper powder or the hydrophilic polymer, in the melt becomes unnecessarily large and the calorific value of the foam 14 cannot be reduced.

If the paper powder content exceeds 60% by weight and the hydrophilic polymer content exceeds 30% by weight, the paper powder and the hydrophilic polymer, which do not show fluidity even when heated, become a synthetic resin inside the extruder. In some cases, the flowability is hindered, and the synthetic resin, the paper powder, and the hydrophilic polymer are not uniformly mixed inside the extruder. Less than 40% by weight of paper powder and 20 of hydrophilic polymer
If it is less than wt%, the weight of the foam 14 will increase.

The paper powder has a particle size in the range of 1 to 200 μm and an average particle size in the range of 30 to 80 μm. When the average particle diameter of the paper powder exceeds 80 μm, the paper powder causes poor dispersion in the synthetic resin, and a lump of the paper powder is formed inside the foam body 14 to lower the strength of the foam body 14. The hydrophilic polymer has an average particle size of 5 to 150 μm.
It is preferably in the range of m.

The foam 14 has a reduced thermal conductivity due to the paper powder contained therein. Therefore, the foam 14 is
Although its average thickness dimension L3 is in the range of 1.0 to 10.0 mm, its thermal conductivity is 0.035 to
It can be in the range of 0.045 W / m · K and has excellent heat insulation and cold insulation. Since the foam 14 contains paper powder, it is possible to reduce the calories burned at the time of incineration and to suppress the generation of soot at the time of incineration, as compared with foamed polyurethane and expanded polystyrene. Further, the foam 14 can be completely burned at a low incineration temperature. Since the container 1B has the foam body 14 attached to the inner surfaces of the container body 2 and the lid 9, the thermal conductivity of the container 1B can be further reduced, and the heat insulation and cold insulation thereof can be improved as compared with the container 1A of FIG. The sex is improved.

Further, in this container 1B, since the foam 14 also functions as a cushioning material, even if an impact is applied to the container 1B during transportation, the impact is hard to be transmitted to the articles stored in the storage section 6. Even if the impact is transmitted to the article, the impact can be reduced.

In the container 1B, the foam 14 is attached to the inner surfaces of the container body 2 and the lid 9, but the foam 14 is attached to at least the inner surface of the container body 2 of the container body 2 and the lid 9. If you have.

[0047]

According to the heat insulation cold container according to the present invention, since the container body and the lid can be manufactured by utilizing the molding technique, the manufacturing of the container does not take any cost or time. In this container, even though the average thickness dimension of the container body and the lid is in the above range, since the container body and the lid have low thermal conductivity in the above range, excellent heat insulation and cold insulation are provided. It is not necessary to increase the thickness of the container body or the lid in order to improve the heat insulating property and the cold insulating property.
In this container, since it is formed from a mixture of a polyolefin-based synthetic resin and paper powder, it is possible to reduce the calories burned when the container is incinerated, and it is possible to suppress the generation of soot. Sometimes it does not have an adverse effect on the environment. Moreover, this container can completely burn the container at a low incineration temperature.

In a container in which a foam is attached to at least the inner surface of the container body of the container body and the lid, the thermal conductivity of the container can be made lower than that of the container in which the foam body is not attached, and the heat insulation of the container is achieved. And cold insulation are further improved. Further, in this container, the foam also functions as a cushioning material for the articles stored in the storage section, so even if a shock is applied to the container during transportation, the impact is transmitted to the articles stored in the storage section. hard.

[Brief description of drawings]

FIG. 1 is a perspective view of a heat insulation cool container.

FIG. 2 is a sectional view taken along the line AA of FIG.

FIG. 3 is a partially cutaway perspective view of an adiabatic container according to another embodiment.

FIG. 4 is a sectional view taken along the line BB of FIG.

[Explanation of symbols]

1A, 1B Insulated cold storage container 2 container body 3 bottom wall 4 Side wall (peripheral wall) 5 Side wall (peripheral wall) 6 Article storage 8 top opening 9 lid 14 foam L1 thickness dimension L2 thickness dimension L3 thickness dimension

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) C08L 1/02 C08L 1/02 23/00 23/00 101/14 101/14 F term (reference) 3E067 BA05A BB01A BB15A BB17A BB25A CA18 EA17 EA32 EB27 FC01 GA01 GA06 GA11 3E086 AD02 BA02 BA15 BA35 BB90 4F074 AA02 AA03 AA16 AA17 AA24 AA98 AE01 BA34 CA22 CC22X CE02 DA07 DA23 DA32 DA34 4F100 AJ07B AK01B AK03A AK03B AK21B BA02 CA01B DE01A DE01B DG10A DG10B DJ01B EJ02B GB16 JA20A JA20B JB05B JJ01A JJ01B JJ02 YY00A YY00B 4J002 AB01X AB04Y BB03W BB05W BB12W BB14W BB20W BE02Y BG01Y BH02Y BP02W GF00 GG01

Claims (4)

[Claims] 1. A heat insulating cold-insulating container having a container body defined by a bottom wall and a peripheral wall extending upward from a peripheral edge of the bottom wall to define an article storage portion, and a lid capable of opening and closing a top opening of the container body. From a mixture in which the container body and the lid are mixed under heating with 25 to 80% by weight of a polyolefin thermoplastic synthetic resin and 20 to 75% by weight of paper powder having an average particle size of 30 to 80 μm. The adiabatic cold insulation container, wherein the mixture is formed and the paper powder is substantially uniformly dispersed in the polyolefin-based synthetic resin in the mixture. 2. The average thickness dimension of the container body and the lid is in the range of 0.8 to 5.0 mm, and the thermal conductivity of the container body and the lid is 0.2 to 0. The heat-insulated container according to claim 1, which is in the range of 5 W / m · K. 3. A foam body having a large number of bubbles inside is attached to at least an inner surface of the container body of the container body and the lid, and the foam body has 20 to 40% by weight.
40 to 60% by weight of the above polyolefin synthetic resin
And 20 to 30% by weight of hydrophilic polymer,
Formed from the polyolefin synthetic resin, the paper powder, and water mixed with a high temperature melt obtained by mixing the hydrophilic polymer under heating, and the weight ratio of the water to the high temperature melt is 10 to 30 wt. %, The water evaporates inside the high-temperature melt to form a large number of bubbles inside the high-temperature melt, while expanding the high-temperature melt to a given magnification, thereby increasing the hydrophilicity. The heat insulating cold-insulating container according to claim 1 or 2, wherein the water-soluble polymer forms a film that covers the bubbles. 4. The average thickness dimension of the foam is 1.0 to
In the range of 10.0 mm, the thermal conductivity of the foam is
The heat insulation cold-storage container according to any one of claims 1 to 3, which is in the range of 0.035 to 0.045 W / mK.