JP2001295984A - Vacuum heat insulator and heat insulating box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum heat insulator applicable to heat insulating materials for domestic electric products or a heat insulating box used in cool retaining transportation, improving heat insulating performance. SOLUTION: The vacuum heat insulator has a easing material as a structural part thereof previously provided with a ridge line using a peak of a core material as a structural part as one end point. Therefore, a thermal fusion layer can be easily bent without loosing reliability, no gap due to the thermal fusion layer occurs at the end of the box if the vacuum heat insulator is applicable to the heat insulating box, and the leakage of heat is prevented to improve heat insulating performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum insulator which can be used for a heat insulating material for home electric appliances, a heat insulating box used for cold storage transportation and the like.

[0002]

2. Description of the Related Art In recent years, as the protection of the global environment has been greatly called out, the necessity of promptly implementing energy saving for home electric appliances has been increasing. One of the solutions is to improve the performance of the heat insulating material.

[0003] To achieve this, there is a vacuum heat insulator, which has about three times the heat insulation performance as compared with a conventional heat insulator such as glass wool.

[0004] A vacuum heat insulator is manufactured by covering a core material with a jacket material made of a gas barrier film and sealing the inside of the core by reducing the pressure. In general, heat fusion is used.

[0005] In the vacuum heat insulator manufactured as described above, a heat fusion layer is formed on the outer periphery of the heat insulator main body where the core material is present. When producing a heat insulating box or the like having a vacuum heat insulator and the vacuum heat insulator sandwiched and fixed between an inner material and an outer material, the heat-sealing layer hinders the formation of a gap at an end. As a result, there is a problem that the heat leakage from this portion lowers the performance as a heat insulating box.

Further, since the heat-sealing layer formed on the outer periphery exists, the heat insulator main body cannot be efficiently stored in the space of the heat insulating box.

Further, if the heat-sealing layer formed on the outer periphery is forcibly bent so as not to be in the way, this portion generally has little strength. Pinholes and the like are liable to occur in the gas barrier film, and there is a risk of lowering reliability.

As a method for solving this problem, Japanese Patent Laid-Open No.
As shown in JP-A-2697981, there is a vacuum heat insulator made by a so-called pillow-type or gusset-type bag making method that does not have a heat sealing layer at least on one side of the outer periphery.

[0009]

As a result, a vacuum heat insulator having no heat-sealing layer on the outer periphery of the opposite side is manufactured, and it is possible to improve the above-mentioned problem. When these bag making methods are adopted, a portion where the heat-sealing layer is overlapped occurs, and a through-hole generally called a through-hole is generated in this portion, and there has been a problem that reliability is reduced.

[0010] In view of the above problems, the present invention provides a vacuum heat insulator in which a ridge line having at least the vertex of the core material as one end point is provided on a jacket material in advance. It can be easily folded or folded, and can be processed so as not to be in the way, and at the same time, it can prevent a decrease in reliability.

[0011]

Means for Solving the Problems In order to solve the above-mentioned problems, in a vacuum heat insulator of the present invention, a vacuum heat insulator comprising a core and a gas barrier film covering the core is provided. A ridge line having the vertex of the core material as one end point is provided in advance on the jacket material.

Accordingly, a pinhole is generated by bending and folding the heat-sealed portion formed on the outer periphery of the vacuum heat insulator with the ridge line provided in advance as a starting point of the fold. The heat-sealing layer can be processed without performing the heat-sealing.

Accordingly, for example, even when the vacuum heat insulator is stored in the heat insulation box, no gap is generated due to the heat-sealing layer portion, so that heat leakage can be prevented and the heat insulation performance can be improved.

Further, like a pillow or gusset type,
Since the heat-sealing layers do not overlap during heat-sealing of the heat-sealing layers, no through-holes are generated and a decrease in reliability can be prevented.

[0015] Also, in a heat insulating box in which a vacuum heat insulator is provided inside a structure composed of an inner material and an outer material, and the vacuum heat insulator is sandwiched and fixed between the inner material and the outer material, By easily bending or folding the heat-welded layer portion of the outer periphery of the body with the ridgeline as the base point, it can be processed without disturbing, so the space formed by the inner material and the outer material,
Since the heat insulator main body having the core material can be efficiently stored, the heat insulation performance of the heat insulation box is improved.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION In a vacuum heat insulator according to the present invention, in a vacuum heat insulator comprising a core material and a covering material made of a gas barrier film covering the core material, at least the vertex of the core material is set as one end point. A ridge line is provided in advance on the jacket material.

Thus, the heat-sealing layer portion formed on the outer periphery of the vacuum heat insulator can be easily bent and folded with the ridge line provided in advance as the starting point of the fold. Since the occurrence of pinholes in the gas barrier film due to bending can be prevented, a decrease in reliability can be prevented.

The folded heat-sealing layer can be easily treated by being brought into close contact with a heat-insulating body having a core material with a tape or the like, and the vacuum heat-insulating body can be made compact.

Further, like a pillow or gusset type,
Since the heat-sealing layers do not overlap during heat-sealing of the heat-sealing layers, no through-holes are generated and a decrease in reliability can be prevented.

[0020] Further, there is provided a vacuum heat insulator characterized in that the thickness of the core material is at least twice as large as the width of the heat welding layer of the jacket material.

Therefore, even if the heat-sealing layer portion is bent and brought into close contact with the side surface of the heat insulator body having the core material with a tape or the like,
The end portion of the heat fusion layer does not protrude from the upper surface of the core material, the heat fusion layer can be processed, and the flatness of the heat insulator main body surface can be maintained.

Further, in a heat insulating box body having a vacuum heat insulator inside a structure composed of an inner material and an outer material, wherein the vacuum heat insulator is sandwiched and fixed between the inner material and the outer material, The body is composed of a core material and a jacket material made of a gas barrier film that covers the core material, and is provided in advance with a ridge line having at least one vertex of the core material as an end point in the jacket material.

Therefore, the heat insulating layer portion on the outer periphery of the vacuum heat insulator is easily bent or folded with the ridgeline as a starting point so as not to be in the way, so that the vacuum heat insulator is stored in the heat insulating box. In addition, since no gap is formed by the heat-sealing layer and heat leakage can be prevented, the heat insulation performance can be improved.

Further, a pair of heat insulators are closely attached to each other to form a heat insulating container, and at least one of the heat insulating plates is a vacuum heat insulator in which a core material is covered with a gas barrier film. It has a storage section to store
In addition, in a heat insulating box comprising a container for closely storing the pair of heat insulators, the vacuum heat insulator comprises a core material and a jacket material made of a gas barrier film covering the core material, and at least the core material A ridge line having the vertex of one end as one end point is provided in the outer cover material in advance.

Therefore, it is possible to easily bend or fold the heat-welded layer portion on the outer periphery of the vacuum heat insulator from the ridge line as a base point without deteriorating the reliability, so that the heat-welded layer portion is not obstructed. The heat insulator main body having the core material of the vacuum heat insulator can be efficiently stored in the container storing the heat insulator.

Further, since the vacuum heat insulator can be efficiently stored, the heat insulation box can be made more compact.

Further, a vacuum heat insulator is disposed on one of the inner walls of the inner space of the structure constituted by the outer box and the inner box so as to be adhered and fixed, and the space other than the vacuum heat insulator is formed of a urethane resin composition. In the heat-insulating box body foam-filled with a material, the vacuum heat insulator comprises a core material and a jacket material made of a gas barrier film covering the core material, and a ridge line having at least a vertex of the core material as one end point is defined as the ridge line. What was previously provided in the jacket material is used.

Accordingly, it is possible to easily bend or fold the heat-welded layer portion on the outer periphery of the vacuum heat insulator with the ridgeline as a base point without deteriorating the reliability, so as not to interfere with the heat-sealing portion. It is possible to prevent the generation of unfilled portions due to the foaming of urethane or the obstruction of flow caused by the presence of the heat welding layer on the outer periphery of the vacuum heat insulator, thereby improving the heat insulating performance of the heat insulating box.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a schematic view of a vacuum heat insulator according to one embodiment of the present invention, and FIG. 2 is a process of bending a heat fusion layer present on the outer periphery of the vacuum heat insulator shown in FIG. An example is shown.

1 is a vacuum insulator, 2 is a core material, 3 is a jacket material,
Reference numeral 4 denotes a heat sealing layer formed on the outer periphery, and a ridge line 5 is provided on the jacket material 3. Reference numeral 6 denotes a tape having adhesiveness.

The vacuum heat insulator 1 is manufactured by inserting the core material 2 into the jacket material 3 whose three sides are heat-sealed, then depressurizing the inside and heat-sealing the remaining one side.

At this time, it is desirable that the core material 2 is previously subjected to a drying treatment in order to remove moisture.

For improving the reliability, it is also possible to insert an adsorbent such as calcium oxide, magnesium oxide, synthetic zeolite, activated carbon, an alloy containing lithium and barium, etc. together with the core material 2.

The core 2 is made of continuous expanded polystyrene.

Here, the core material 2 is made of, for example, aggregated silica powder,
Powders such as expanded pearlite powder, silicate earth powder, calcium carbonate powder, and foamed plastic powder; molded articles such as silica powder molded articles, expanded pearlite molded articles, and calcium silicate molded articles; and organic foams such as continuous expanded polyurethane. There is no problem with using such as.

The outer cover material 3 is composed of a polyethylene terephthalate film (12 μm) as a surface protective layer from the outer layer, an ethylene-vinyl alcohol copolymer resin film (12 μm) on which aluminum is deposited as a gas barrier layer, and a high density polyethylene as a heat sealing layer. Film (50 μm),
Further, it is a laminated film provided with a nylon film (15 μm) as a surface protective layer on the outermost layer for improving scratch resistance.

Here, the jacket material 3 may be a laminate film having at least a gas barrier layer and a heat-sealing layer, and is required as an outermost layer in order to further improve scratch resistance and flexibility. If necessary, one or more surface protective layers may be provided.

For example, as a constituent material of the gas barrier layer, a metal foil such as aluminum or a metal obtained by depositing aluminum or copper on a high gas barrier film such as polyethylene terephthalate, ethylene / vinyl alcohol copolymer resin or polyethylene naphthalate is used. Examples thereof include a vapor-deposited film and an inorganic vapor-deposited film on which ceramics and the like are vapor-deposited, but are not particularly limited.

For example, as the heat sealing layer, high density polyethylene film, low density polyethylene film, polypropylene film, polyacrylonitrile film, unstretched polyethylene terephthalate film, ethylene
Examples thereof include a vinyl alcohol copolymer resin film. Examples of the surface protective layer include stretched products of a polyethylene terephthalate film, a nylon film, and a polypropylene film, and are not particularly limited.

The ridge line 5 is obtained by inserting the core material 2 into the jacket material 3 whose three sides are heat-sealed, positioning the core material 2, and then folding the core material into a mountain fold with the core material as one end point before depressurizing the inside. Form.

The tape 6 is used to fix the folded heat-sealing layer. The material is not particularly limited, and an adhesive such as an epoxy resin may be used. .

Thus, the heat-sealing layer 4 present on the outer periphery of the vacuum heat insulator 1 shown in FIG. 1 can be easily bent with the ridgeline 5 as a starting point. For example, as shown in FIG. During processing, the occurrence of pinholes due to excessive bending can be suppressed.

Further, by bending as shown in FIG. 2, it is possible to eliminate the portion where only the heat sealing layer 4 having no heat insulating performance exists even at the end of the vacuum heat insulator.

(Embodiment 2) FIG. 3 is a sectional view of a heat insulating box according to an embodiment of the present invention.

7 is an inner material, 8 is an outer material, both of which are stainless steel.

Here, the inner material and the outer material are not particularly limited as long as they are materials capable of forming a box, and include metals such as aluminum, plastic molded bodies, and the like.

As shown in FIG. 2, the vacuum heat insulator 1 is obtained by bending a heat-sealing layer.

As a result, even near the top of the heat insulating box, the vacuum heat insulator can be stored without being disturbed by the heat sealing layer, and heat leakage can be prevented. Improvement can be achieved.

In this embodiment, the vacuum heat insulator is not bonded and fixed. However, if necessary, the vacuum heat insulator and the heat insulating structure are bonded by using an adhesive aid such as a double-sided tape or a hot melt, and an auxiliary tool. There is no problem if it is completely fixed.

(Embodiment 3) FIG. 4 is a sectional view of a heat insulating box according to an embodiment of the present invention.

Reference numeral 9 denotes a frame for tightly storing a pair of heat insulators, which is a plastic molded body mainly composed of polypropylene, which is formed on a container so that the vacuum heat insulator 1 can be housed therein. Press 1 so that they come into close contact with each other,
It has a structure that can be engaged.

The box 9 may be made of any material that can form a frame, and there is no problem even if it is made of a metal such as aluminum or a plastic molded body other than polypropylene.

Reference numeral 10 denotes a storage portion, which is formed in advance on the core material 2 by pressing or the like.

As the vacuum heat insulator 1, a heat-sealed layer treated as shown in FIG. 2 is used.

As a result, the vacuum heat insulator can be made more compact, which leads to a more compact heat insulating container and an improved transport efficiency.

In this embodiment, the vacuum heat insulator is not bonded and fixed. However, if necessary, the vacuum heat insulator and the heat insulating structure are bonded by using an adhesive aid such as a double-sided tape or a hot melt, and an auxiliary tool. There is no problem if it is completely fixed.

(Embodiment 4) FIG. 5 is a sectional view of a heat insulating wall of a heat insulating box according to an embodiment of the present invention.

Reference numeral 11 denotes an inner box, 12 denotes an outer box.
Is a plastic molded body, and the outer box 12 is an iron plate.

Reference numeral 13 denotes a rigid urethane foam.

As the vacuum heat insulator 1, a heat-insulated layer treated as shown in FIG. 2 is used.

Accordingly, it is possible to prevent the generation of unfilled portions due to the urethane foaming or flow obstruction caused by the presence of the heat-sealing layer on the outer periphery of the vacuum heat insulator, thereby improving the heat insulating performance of the heat insulating box.

[0063]

As described above, the vacuum insulator of the present invention is
In a vacuum heat insulator composed of a core material and a covering material made of a gas barrier film covering the core material, a ridge line having at least a vertex of the core material as one end point is provided in the covering material in advance. Since the heat insulating layer portion is formed on the outer periphery of the vacuum heat insulating member, the heat sealing layer portion can be easily bent and folded with the ridge line provided in advance as a starting point of the fold. Also, since pinholes in the gas barrier film due to bending can be prevented,
It is possible to prevent a decrease in reliability.

The folded heat-sealing layer can be easily treated by bringing it into close contact with a heat-insulating body having a core material with a tape or the like, and the vacuum heat-insulating body can be made compact.

Further, like a pillow or gusset type,
Since the heat-sealing layers do not overlap during heat-sealing of the heat-sealing layers, no through-holes are generated and a decrease in reliability can be prevented.

Also, since the vacuum heat insulator is characterized in that the thickness of the core material is at least twice as large as the width of the heat-sealing layer of the jacket material, the heat-sealing layer portion is bent and Even if it is brought into close contact with the side surface of the heat insulator body having a material with tape,
The end portion of the heat fusion layer does not protrude from the upper surface of the core material, the heat fusion layer can be processed, and the flatness of the heat insulator main body surface can be maintained.

Further, in a heat insulating box body having a vacuum heat insulator inside a structure composed of an inner material and an outer material, wherein the vacuum heat insulator is sandwiched and fixed between the inner material and the outer material, Insulation characterized in that the body is composed of a core material and a sheath material made of a gas barrier film covering the core material, and a ridge line having at least one vertex of the core material as an end point is provided in advance in the sheath material. Since it is a box, the heat insulation layer portion on the outer periphery of the vacuum heat insulator is easily bent or folded with the ridgeline as a starting point so as not to be in the way, so that the vacuum heat insulator is housed in the heat insulation box. In some cases, no gap is formed by the heat sealing layer, and heat leakage can be prevented, so that the heat insulation performance can be improved.

Further, a pair of heat insulators are closely attached to each other to form a heat insulating container, and at least one of the heat insulating plates is a vacuum heat insulator whose core material is covered with a gas barrier film. It has a storage section to store
In addition, in a heat insulating box comprising a container for closely storing the pair of heat insulators, the vacuum heat insulator comprises a core material and a jacket material made of a gas barrier film covering the core material, and at least the core material Since the heat insulation box is characterized in that a ridge line having the vertex as one end point is provided in advance on the jacket material, the heat-sealed layer portion on the outer periphery of the vacuum heat insulator is not reduced in reliability. Easily bend or fold from the ridgeline as a base point so that it can be treated without disturbing, and efficiently store the heat insulator main body having the core material of the vacuum heat insulator in the container that stores the heat insulator. Can be.

Further, since the vacuum heat insulator can be efficiently stored, the heat insulation box can be made compact.

Further, a vacuum heat insulator is provided on one of the inner walls of the internal space of the structure constituted by the outer box and the inner box so as to be adhered and fixed, and the space other than the vacuum heat insulator is formed of a urethane resin composition. In the heat-insulating box body foam-filled with a material, the vacuum heat insulator comprises a core material and a jacket material made of a gas barrier film covering the core material, and a ridge line having at least a vertex of the core material as one end point is defined as the ridge line. Since the heat insulating box is characterized by being provided in advance on the outer cover material, the heat-welded layer portion on the outer periphery of the vacuum heat insulator can be easily bent or folded from the ridgeline without deteriorating reliability. It is possible to prevent the occurrence of unfilled parts due to urethane foaming and flow obstruction caused by the presence of the heat-sealing layer on the outer periphery of the vacuum heat insulator. Improved heat insulation performance It is.

[Brief description of the drawings]

FIG. 1 shows a vacuum insulator according to one embodiment of the present invention.

FIG. 2 is a view showing a vacuum insulator according to an embodiment of the present invention;

FIG. 3 is a sectional view of a heat insulating box according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view of the heat insulating box according to one embodiment of the present invention.

FIG. 5 is a sectional view of a heat insulating box according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vacuum heat insulator 2 Core material 3 Outer covering material 4 Heat fusion layer 5 Ridge line 6 Tape 7 Inner material 8 Outer material 9 Frame body 10 Storage part 11 Inner box 12 Outer box 13 Hard urethane foam

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3E067 AA11 AB51 BA05B BA05C BB11B BB11C BB16A BB17A CA18 FA04 GA01 GA14 3H036 AA08 AA09 AB18 AB25 AB28 AB29 AC01 AE13 3L102 MA01 MB24

Claims (5)

[Claims] 1. A core material and a jacket material made of a gas barrier film covering the core material, wherein a ridge line having at least a vertex of the core material as one end point is provided in advance in the jacket material. Characterized vacuum insulation. 2. The vacuum heat insulator according to claim 1, wherein the thickness of the core material is at least twice as large as the width of the heat welding layer of the jacket material. 3. A heat insulating box body having a vacuum heat insulator inside a structure composed of an inner material and an outer material, wherein the vacuum heat insulator is sandwiched and fixed between the inner material and the outer material. Insulation characterized in that the body is composed of a core material and a sheath material made of a gas barrier film covering the core material, and a ridge line having at least one vertex of the core material as an end point is provided in advance in the sheath material. Box. 4. A heat-insulating container comprising a pair of heat-insulating members, wherein at least one of the heat-insulating plates is a vacuum heat-insulating member in which a core material is covered with a gas barrier film, and at least one of the heat-insulating plates has a storage object. And a container for tightly storing the pair of heat insulators, wherein the vacuum heat insulator comprises a core material and a gas barrier film covering the core material. Made of wood,
A heat insulation box, wherein a ridge line having at least a vertex of the core material as one end point is provided in advance in the jacket material. 5. A vacuum heat insulator is provided on one of the inner walls of a structural body space composed of an outer box and an inner box so as to be adhesively fixed thereto, and the space other than the vacuum heat insulator is formed of a urethane resin composition. In the heat-insulating box body foam-filled with a material, the vacuum heat insulator comprises a core material and a jacket material made of a gas barrier film covering the core material, and a ridge line having at least a vertex of the core material as one end point is defined as the ridge line. A heat-insulating box, which is provided on a jacket material in advance.