JP2002188791A - Vacuum heat insulating material, vacuum heat insulator, disposal method of heat insulating box, method of manufacturing vacuum heat insulating material and vacuum heat insulator, and refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disposal method of a heat insulating box showing a high performance for a long time from an initial time and improved in a material recycle ratio and easily recycleable by using a covering material having an excellent gas barrier property without receiving the influence of a transmitted heat leak, and a refrigerator. SOLUTION: A polyester film covering material formed of a core material made of polyester fiber collective with a diameter of 0.5 denier or less and a thin film of diamond-like carbon is used to improve the performance and to be recycled for reproduction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum heat insulating material, a vacuum heat insulating material, a method for treating a heat insulating box, a method for manufacturing a vacuum heat insulating material or a vacuum heat insulating material, and a refrigerator.

[0002]

2. Description of the Related Art In recent years, various efforts have been made to save energy and resources from the viewpoint of protecting the global environment.

[0003] From the viewpoint of energy saving,
As disclosed in Japanese Patent No. 479, a vacuum heat insulating material in which a core material having a porous structure is covered with a covering material including aluminum foil to seal the inside of the core under reduced pressure has been proposed, and has recently begun to be used industrially. This vacuum heat insulating material has a thermal conductivity of 0.005 W / mK, which is three times the heat insulating performance of a conventional rigid urethane foam, and contributes as a heat insulating material for energy saving.

[0004] From the viewpoint of resource saving, recycling of waste home electric appliances such as refrigerators and televisions has become a very important theme, and various efforts have been made particularly in refrigerators.

[0005] For recycling refrigerators, especially for heat-insulating boxes, which are main components, metal materials such as iron plates can be recycled relatively easily. However, plastics and the like, in which various materials are used are mixed, and efforts are being made to integrate raw materials. In the recycling of the vacuum insulation material, it is a fact that it has not been studied yet, especially, the core material is an inorganic powder, or the jacket material is a composite laminate film material such as a polyester film, a nylon film, and a polyethylene film. Therefore, there is a high possibility that it will be mixed as impurities into other materials, and there is generally no method other than landfill or incineration.

[0006]

As the demand for energy saving increases, it has become an important theme to improve the heat insulating performance of vacuum heat insulating materials.

Heretofore, in order to maintain the gas barrier property of the jacket material, it has been general to use a multilayer film in which an aluminum foil or an aluminum vapor-deposited film is laminated.
However, since aluminum is a metal having a very high heat conductivity, the amount of heat leaking through the jacket material is large, and when aluminum foil is used, the heat insulation performance is deteriorated by 50% or more as a vacuum heat insulating material. In addition, the effect on heat insulation performance can be neglected in aluminum deposition, but the low crystal distribution density of aluminum on the film causes poor gas barrier properties, making it difficult to maintain a long-term vacuum degree and causing deterioration over time in heat insulation performance. was there.

[0008] Another problem is that when the outer cover material is a vacuum heat insulating material composed of a multi-layer film of aluminum foil and plastic film, in the case of waste recycling, the material is composed of different materials. Recycling was impossible due to separation difficulties.

[0009] In addition, if the core material and the jacket material are different materials, there is a problem that the material selection becomes more difficult.

In addition, when a vacuum heat insulating material is used for a heat insulating box of a refrigerator or the like, if the type of the material of the vacuum heat insulating material is unknown, it is not possible to determine a suitable treatment selection method at the time of disposal of the refrigerator, and the resources are recycled. There is a problem with a fatal problem that the efficiency of the method is significantly reduced.

In view of the above-mentioned problems, the present invention provides a vacuum heat insulator, a vacuum heat insulator, a method of treating a heat insulation box, and a vacuum heat insulator, which exhibit high heat insulation performance and can improve the material recycling rate in resource recycling. And a method for manufacturing a vacuum heat insulator, and a refrigerator.

[0012]

In order to achieve this object, the present invention has the following arrangement.

[0013] The vacuum heat insulating material according to claim 1 of the present invention comprises a core material and a jacket material made of a laminated film to which a diamond-like carbon thin film is adhered. It was done.

According to the present invention, since the diamond-like carbon fixed to the film is a thin film, the adverse effect of heat conduction through the outer cover material and leaking is extremely small, and the high heat insulating performance of the original vacuum heat insulating material is very small. Can be demonstrated without sacrificing In addition, since diamond-like carbon is a thin film having a planar dense structure and no pinholes, it has excellent gas barrier properties and can achieve excellent quality in which the heat insulation performance does not deteriorate with time due to an increase in internal pressure.

In a vacuum heat insulating material according to a second aspect of the present invention, the core material is a polyester fiber aggregate having a diameter of 0.5 denier or less, and the outer material of the laminate film is a diamond-like carbon thin film. It consists of a fixed polyester film and a non-oriented polyester film.

According to the present invention, since the core material is a polyester fiber aggregate having a diameter of 0.5 denier or less, the core material has a porous structure and forms a fine space, and exhibits excellent heat insulating performance. I do. In addition, since the film material for fixing the diamond-like carbon thin film is made of polyester resin and the inner layer for hermetically sealing the outer material by heat welding is made of unstretched polyester resin, When the heat insulating material is discarded and recycled, the vacuum heat insulating material can be easily reused as a polyester resin body.

A vacuum heat insulator according to claim 3 of the present invention comprises a core material and a resin-molded face material in which one or both of an inner box and an outer box are fixed with a diamond-like carbon thin film by post-processing. The core material is covered with a face material, and the inside is reduced in pressure and sealed.

According to the present invention, since a polyester resin molded body on which diamond-like carbon having a low thermal conductivity is deposited is used for the outer cover material, the adverse effect of heat conduction through the outer cover material and leaking is extremely small, and Since it is vapor-deposited on the polyester resin molded body by post-processing, there is no cracking of the vapor-deposited thin film caused by molding stress, and it has excellent gas barrier properties and excellent quality without deterioration over time. . In addition, since the peripheral portions of the face material formed of the polyester resin can be easily thermally welded to each other by heating, a highly reliable and low-cost vacuum heat insulator can be easily realized. Further, even if an iron plate is used for the outer box, a vacuum heat insulator can be easily obtained by bonding the iron plate and the face material of the polyester resin.

According to a fourth aspect of the present invention, in the vacuum heat insulator, the core material is a polyester fiber aggregate having a diameter of 0.5 denier or less, and the resin-molded face material adheres the diamond-like carbon thin film. It consists of a stretched non-stretched polyester sheet.

According to the present invention, since the core material is a polyester fiber aggregate having a fiber diameter of 0.5 denier or less, the core material has a porous structure and forms a fine space, and has excellent heat insulating performance. Demonstrate. In addition, when the vacuum insulation material is discarded and reclaimed, the same raw materials are integrated because the jacket material is made of unstretched polyester resin. It becomes.

According to a fifth aspect of the present invention, there is provided a method for treating an insulated box, comprising: a crushing step of crushing a vacuum heat insulating material or a heat insulating box including a vacuum heat insulator; And a separation process for separating the vacuum heat insulating material or the vacuum heat insulator from the heat insulating box in the crushing process.

According to the present invention, the vacuum heat insulating material can be easily separated from the heat insulating box, and can be recycled as a raw material.

According to a sixth aspect of the present invention, there is provided a method for treating an insulated box, the step of crushing the vacuum heat insulating material or the heat insulating box including the vacuum heat insulator according to any one of the second and fourth aspects. And the waste pieces crushed by the crushing step are input and separated into iron, non-ferrous metal, resin dust, etc., and the vacuum heat insulating material or the vacuum heat insulator is separated from the heat insulating box in the crushing step. Separation processing step, a vacuum heat insulating material processing step of recovering as a polyester resin member, and a raw material production step for obtaining a recycled polyester resin product.

According to the present invention, the vacuum heat insulating material can be easily separated from the heat insulating box, and the material of the vacuum heat insulating material and the core material and the jacket material forming the vacuum heat insulating material are polyester resin. Because of the integration, the separated and sorted vacuum heat insulating material and vacuum heat insulator can be easily recycled as a raw material for polyester by heat melting alone. In addition,
The amount of the adhered diamond-like carbon is extremely small and does not lower the quality of the recycled resin.

According to a seventh aspect of the present invention, there is provided a vacuum heat insulating material and a method for manufacturing a vacuum heat insulator, wherein the polyester resin obtained by the processing method of the seventh aspect is recycled as a raw material, and the polyester fiber collected body is again recycled. And a polyester film and a polyester resin molded body, which are used for the vacuum heat insulator according to the second aspect and the vacuum heat insulator according to the fourth aspect.

According to the present invention, the polyester resin used for the vacuum heat insulating material and the vacuum heat insulating material can be recycled into the material for the vacuum heat insulating material and the vacuum heat insulating material, thereby realizing resource saving. is there.

Further, in the case where the used heat insulating box is used in the future, it can be reused as a resource.

[0028] On the other hand, the refrigerator according to claim 8 of the present invention comprises:
It indicates the material type of the vacuum heat insulator or the vacuum heat insulator. A refrigerator according to a ninth aspect of the present invention is one in which the types of raw materials of the vacuum heat insulator and the vacuum heat insulator are recorded.

According to the present invention, it is possible to determine the type of the vacuum heat insulating material and the material of the vacuum heat insulator used in the heat insulating box which is a component of the waste refrigerator. It can be easily recycled. In addition, by recording the information, the recorded information can be read at the time of waste disposal of the refrigerator, and the treatment of the vacuum heat insulating material or the vacuum heat insulator can be determined.

[0030]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The vacuum heat insulating material according to the first aspect of the present invention comprises a core material and a sheath material of a laminated film to which a diamond-like carbon thin film is fixed, and the core material is covered with the sheath material. Since the inside is decompressed, it is possible to realize high quality with excellent heat insulation performance and no deterioration over time. In other words, since the diamond-like carbon adhered to the film is a thin film, the adverse effect of heat conduction through the jacket material and leaking is extremely small, and is exhibited without sacrificing the high heat insulating performance of the original vacuum heat insulating material it can. In addition, since diamond-like carbon is a thin film having a planar dense structure and no pinholes, it has excellent gas barrier properties and can achieve excellent quality in which the heat insulation performance does not deteriorate with time due to an increase in internal pressure.

The vacuum heat insulating material according to the second aspect of the present invention comprises:
Since the core material is a polyester fiber aggregate having a diameter of 0.5 denier or less, and the coating material of the laminate film is composed of a polyester film fixed with a diamond-like carbon thin film and a non-oriented polyester film, the core material is It has a porous structure and forms a fine space, and exhibits excellent heat insulating performance. In addition, since the film material for fixing the diamond-like carbon thin film is made of polyester resin and the inner layer for hermetically sealing the outer material by heat welding is made of unstretched polyester resin, When the heat insulating material is discarded and recycled, the vacuum heat insulating material can be easily separated and reused as a polyester resin body.

The vacuum heat insulator according to claim 3 of the present invention comprises:
A core material, and one or both of the inner box and the outer box were made of a resin-molded face material in which a diamond-like carbon thin film was fixed by post-processing, and the core material was covered with the face material, and the inside was sealed by decompressing the inside. As a result, the negative effect of leaking due to heat conduction through the jacket material is extremely small, and the thin film is cracked due to molding stress as a result of fixing the thin film to the resin molding surface material by post-processing. Nothing at all, excellent gas barrier properties,
Excellent quality without deterioration over time can be realized. In addition, the peripheral edges of the resin molding can be easily thermally welded to each other by heating, so that a highly reliable and low-cost vacuum heat insulator can be easily realized. Further, even if an iron plate is used for the outer box, a vacuum heat insulator can be easily obtained by bonding the iron plate and the face material of the polyester resin.

In a vacuum heat insulator according to a fourth aspect of the present invention, the core material is a polyester fiber cotton body having a diameter of 0.5 denier or less, and the resin-molded face material adheres a diamond-like carbon thin film. Since the core material is made of a non-stretched polyester sheet, the core material has a porous structure and forms a fine space, and exhibits excellent heat insulating performance. In addition, when the vacuum insulation material is discarded and reclaimed, the same raw materials are integrated because the jacket material is made of unstretched polyester resin. It becomes.

According to a fifth aspect of the present invention, there is provided a method for treating an insulated box, comprising: a crushing step of crushing a vacuum heat insulating material or a heat insulating box including a vacuum heat insulator; and a waste piece crushed by the crushing step. Since it includes a sorting process step of sorting into iron, non-ferrous metal, resinous dust, and the like, and a separating process step of separating a vacuum heat insulating material or a vacuum heat insulating material from the heat insulating box in the crushing step, vacuum is easily applied. The heat insulating material can be separated from the heat insulating box, and can be recycled as a raw material.

According to a sixth aspect of the present invention, there is provided a method for treating a heat insulating box, comprising the steps of crushing the vacuum heat insulating material or the heat insulating box including the vacuum heat insulator according to any one of the second and fourth aspects. And the waste pieces crushed by the crushing step are input and separated into iron, non-ferrous metal, resin dust, and the like, and the vacuum crushing material or the vacuum heat insulating body is separated from the heat insulating box in the crushing step. Separating the vacuum heat insulating material from the heat insulating box, because it includes a separation processing step of performing, a vacuum heat insulating material processing step of recovering as a polyester resin member, and a remanufacturing process for obtaining a polyester resin recycled product. In addition, since the vacuum insulating material and the core material and the covering material forming the vacuum insulating material are integrated with the polyester resin, separation and sorting is easy, and the vacuum insulating material and the vacuum insulating material can be heated. Dissolution It is possible to reproduce easily recycled as polyester raw material alone. It should be noted that the amount of the adhered diamond-like carbon is extremely small and does not degrade the quality of the recycled resin.

Further, in the vacuum heat insulating material and the method for manufacturing a vacuum heat insulator according to claim 7 of the present invention, the polyester resin obtained by the processing method of claim 7 is recycled as a raw material,
Again polyester fiber wool and polyester film,
Since the polyester resin used for the vacuum heat insulating material according to claim 2 or the vacuum heat insulating material according to claim 4 is used as a polyester resin molded body, the polyester resin used for the vacuum heat insulating material or the vacuum heat insulating material is again vacuum evacuated. Since it can be regenerated as a heat insulating material or a vacuum heat insulating material, resource saving can be realized.

In the case where the used heat insulating box is used in the future, it can be used again as a resource.

On the other hand, the refrigerator according to claim 8 of the present invention displays the type of the vacuum heat insulating material and the material of the vacuum heat insulator. Further, the refrigerator according to claim 9 of the present invention comprises:
Because the material type of the vacuum heat insulator and the vacuum heat insulator is recorded, the material type of the vacuum heat insulator and the vacuum heat insulator used in the heat insulation box, which is a component of the waste refrigerator, can be determined. Suitable treatment methods and raw material production methods can be selected and determined, and recycling can be easily performed. In addition, by recording the information, the recorded information can be read at the time of waste disposal of the refrigerator, and the treatment of the vacuum heat insulating material or the vacuum heat insulator can be determined.

FIG. 1 shows a vacuum heat insulating material, a vacuum heat insulating material, a method for processing a heat insulating box, a method for manufacturing a vacuum heat insulating material and a vacuum heat insulating material, and an embodiment of a refrigerator according to the present invention.
This will be described with reference to FIG.

(Embodiment 1) FIG. 1 shows an example of a vacuum heat insulating material according to Embodiment 1 and corresponds to claims 1 and 2 described in the claims of the present application. Reference numeral 1 denotes a vacuum heat insulating material, which is a core material 2 made of a polyester fiber bundle having a fiber diameter of 0.5 denier, a 25 μm polyester film on which a diamond-like carbon thin film is deposited, and 50
The core material 2 is covered with the outer cover material 3 and the inside is covered with a 0.1 μm unstretched polyester film.
The pressure is reduced to 1 torr to form a hermetic seal. In addition, as the polyester film on which diamond-like carbon was vapor-deposited, a film having a conductive layer made of aluminum vapor deposition or the like in advance on the surface layer was used.

The initial thermal conductivity at this time was 0.0033.
In W / mK, the thermal conductivity after standing at room temperature after 300 days is:
It was 0.0038 W / mK.

It should be noted that a 0.75 denier polyester fiber cotton body was used as the core material, and
When a laminated film having an aluminum foil of μm and an aluminum-evaporated polyester film were used, the initial thermal conductivity was 0.0058 W / mK and 0.0036 W / mK, respectively.
W / mK, and the thermal conductivity after 300 days is 0.0060.
W / mK and 0.0086 W / mK.

As described above, the core material 2 made of a polyester fiber wool having a fiber diameter of 0.5 denier, a 25 μm polyester film on which a diamond-like carbon thin film is deposited, and a 50 μm unstretched polyester film are laminated. In the vacuum heat insulating material 1 made of the material 2, the effect of the core material 2 having a porous structure and forming a fine space and the outer material 3 having a small heat conduction and excellent gas barrier properties are provided.
Thereby, excellent initial heat insulating performance can be maintained for a long period of time.

(Embodiment 2) FIG. 2 shows an example of a vacuum heat insulator according to Embodiment 2 of the present invention, which corresponds to claims 3 and 4 described in the claims of the present application. Reference numeral 4 denotes an inner box, which is made of a polyester resin-made face material having a concave-convex shape for arranging storage components and having a carbon-like carbon thin film deposited on an inner layer. Reference numeral 5 denotes an outer case, which is made of a polyester resin molded surface material in which a carbon-like carbon thin film is deposited on the inner layer, similarly to the inner case 4. Between inner box 4 and outer box 5,
The core 2 made of a polyester fiber wool having a fiber diameter of 0.5 denier is filled, and the flanges of the inner box 4 and the outer box 5 are heat-welded. The inside is hermetically sealed at a reduced pressure of 0.1 torr to obtain a vacuum heat insulator 6.

Thereafter, the members are attached to form the heat insulating box 7. At this time, the initial heat conductivity of the heat insulating wall of the heat insulating box 7 was 0.0034 W / mK, and the heat conductivity after standing at room temperature after 300 days was 0.0041 W / mK.
Since stainless steel is not used for the container material like a thermos bottle, the weight can be reduced to 1/3, and a highly insulated box body that is easy to handle and has high reliability can be obtained.

(Embodiment 3) FIG. 3 is a process diagram showing a method of processing a heat insulating box in Embodiment 3, and corresponds to claims 5 and 6 described in the claims of the present application.

First, the outline of the procedure for treating waste will be described.

The transported heat insulating box 7 of the refrigerator first passes through the crushing step 8 and proceeds to the sorting processing step 9. In the sorting process 9, the waste crushed in the crushing process 8 is separated into heavy waste and light waste, and each waste is separated and recovered for each predetermined material. Here, in the vacuum heat insulating material processing step 10 in the light waste sorting process, the vacuum heat insulating material contained in the heat insulating box 7 is collected.

Next, the processing procedure will be described in detail with reference to FIG.

In FIG. 3, the waste of the heat-insulating box 7 transported to the waste treatment facility is fed into the crushing step 8 in step 21. In the case of a refrigerator, the refrigerant in the refrigerator is removed before charging the materials. Then, the waste material charged is transferred to the pre-shredder by a conveyor (step 22).

The waste crushed by the preshredder in the coarse crushing in step 23 is fed into a crusher. In step 24, the coarsely crushed waste in the previous process is further finely crushed by a uniaxial car shredder having an output of about 1000 horsepower.

In step 25, light wastes other than heavy iron, non-ferrous metals and rubbers are separated by a vibrating conveyor disposed below the car shredder take-out section, and in step 26, they are transferred by a belt-type conveyor or the like. .

Step 27: magnetic force sorter, step 28
The waste is separated into those containing ferrous metals and those not containing ferrous metals by the vibrating conveyor and the magnetic separation drum of step 29.

In step 27A, the light-weight dust soared in steps 26 and 27 is collected and transferred to a dust collection step (not shown) via a duct.

The waste separated in step 29 is transferred by a conveyor (step 30), and is manually separated on the conveyor into iron and other parts (step 31). The iron selected by the manual sorting in step 31 is transferred to a truck for accumulation and transport by a conveyor (step 32), and wastes other than iron such as motor scraps and cables are separated by manual sorting.

The non-ferrous metal-free waste separated in step 29 is transferred by a conveyor (step 52, step 54), and the non-ferrous metal is separated by hand (step 53). Waste including rubber dust is separated and collected.

As described above, the crushing step 8 described in the claims of the present application includes the respective means and steps from step 21 to step 24, and the sorting processing step 9 includes the steps from step 25 to step 32. , And step 52
To step 54, respectively.

Next, the vacuum insulator 5 separated in the crushing step
Is sucked into the cyclone of the vacuum heat insulating material processing step 10 through the duct (step 33). In this cyclone, fragments of the core material 1, the inner box 4, and the outer box 5 are separated and collected (Step 35).

The debris separated by the cyclone (step 35) is compressed by a screw type volume reducer (step 36) and recovered as a polyester resin material.

As described above, the vacuum heat insulating material processing step 10 described in the claims of the present application includes the steps 33
To step 36.

Next, the polyester resin material separated and recovered in the vacuum heat insulating material processing step 10 is formed into chips (step 3).
7) It is melted again (step 38) and can be reused as pellets.

As described above, the re-raw material production step 11 described in the claims of the present application corresponds to each means and step from step 37 to step 38, respectively.

Thereafter, from the recycled polyester resin obtained in the raw material production step 11, a cotton swab made of polyester fibers, a polyester film or a resin molded face material can be produced.

(Embodiment 4) FIG. 4 shows an example of a vacuum heat insulating material according to Embodiment 4 of the present invention. The core material 2 is a cotton body made of the polyester fiber obtained in the third embodiment. Further, the jacket material 3 is obtained by depositing a diamond-like carbon thin film on the polyester film similarly obtained in the third embodiment. Thus, a new vacuum heat insulating material 1 can be produced from the used vacuum heat insulating material 1.

(Embodiment 5) FIG. 5 shows a refrigerator according to an embodiment of the present invention. Numeral 12 denotes a refrigerator, in which the vacuum heat insulator 5 is a heat insulating material, and is covered with a precoated iron plate 13. Reference numeral 14 denotes a display management plate attached to the refrigerator, which specifies the material type of the vacuum heat insulator 5.

The display management board 14 may be one recorded with a smart media, a bar code, or the like.
When the refrigerator is crushed, the information can be read and the processing method of the vacuum insulator 5 can be selected.

[0067]

As is apparent from the above description,
The vacuum heat-insulating material of the present invention has a very small adverse effect of leaking heat by conducting heat through the jacket material, and can exhibit the high heat-insulating performance of the original vacuum heat-insulating material without sacrificing it. In addition, since diamond-like carbon is a thin film having a planar dense structure, it has excellent gas barrier properties and can achieve excellent quality without deterioration over time.

Further, since the core material is a polyester fiber aggregate having a diameter of 0.5 denier or less, it has a porous structure and a fine space, and exhibits excellent heat insulating performance.
In addition, since a film material for depositing diamond-like carbon is used as a polyester resin, and an unstretched polyester resin is used for an inner layer for sealing the jacket material by heat welding, a vacuum heat insulating material is used. In the case of waste recycling, it can be easily reused as a polyester resin.

Further, in the vacuum heat insulator of the present invention, the core material is covered with a polyester resin molded face material to which diamond-like carbon is fixed by post-processing, and the inside is reduced in pressure and sealed. The adverse effect of leaking due to heat conduction through the outer cover material is extremely small, and since it is deposited by post-processing on the face material of polyester resin molding, there is no crack in the deposited thin film generated by molding stress, etc. It is possible to realize excellent quality with excellent gas barrier properties and no deterioration over time. In addition, since the peripheral portions of the face material of the polyester resin molding can be easily thermally welded by heating, a highly reliable, low-cost, lightweight vacuum heat insulator can be easily realized. Of course, even if an iron plate is used for the outer box, the iron plate and the face material of the polyester resin can be bonded, and a vacuum heat insulator can be easily obtained.

Further, the method for treating a heat insulating box of the present invention comprises a crushing step of crushing a vacuum heat insulating material or a heat insulating box including a vacuum heat insulating material, and a waste piece crushed by the crushing step is charged, A separating process for separating non-ferrous metal and resin dust, etc., a separating process for separating the vacuum insulating material or the vacuum insulating material from the insulating box in the crushing process, and a vacuum insulating process for collecting the polyester resin member. Therefore, the vacuum heat insulating material can be easily separated from the heat insulating box, and can be recycled as a polyester raw material. In particular, since the material of the vacuum insulation material and the core material that forms the vacuum insulation material and the jacket material are integrated with the polyester resin, separation and sorting is easy, and it can be easily recycled as raw material only by heat melting. And resource saving is possible.

Further, in the case where the used heat insulating box is used in the future, it can be reused as a resource.

On the other hand, since the type of vacuum heat insulating material and the material type of the vacuum heat insulator are displayed or recorded on the refrigerator, the vacuum heat insulating material and the material of the vacuum heat insulator used in the heat insulating box of the discarded refrigerator are used. Since the type can be determined, a suitable processing method and raw material manufacturing method can be selected and determined, and recycling can be easily performed.

As described above, according to the present invention, it is possible to provide a vacuum heat insulating material and a vacuum heat insulator which have high heat insulating performance and do not deteriorate with time, and at the same time, improve the material recycling rate of the used heat insulating box.
An object of the present invention is to provide a vacuum heat insulating material, a method of manufacturing a vacuum heat insulator, and a refrigerator that facilitate recycling.

[Brief description of the drawings]

FIG. 1 is a schematic view of a vacuum heat insulating material according to a first embodiment of the present invention.

FIG. 2 is a schematic view of a vacuum insulator according to a second embodiment of the present invention.

FIG. 3 is a process diagram of a heat-insulating box in Embodiment 3 of the present invention.

FIG. 4 is a schematic view of a vacuum heat insulating material according to a fourth embodiment of the present invention.

FIG. 5 is a schematic view of a refrigerator showing a cutout according to a fifth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 vacuum heat insulating material 2 core material 3 outer cover material 4 inner box 5 outer box 6 vacuum heat insulator 7 heat insulating box body 8 crushing step 9 sorting processing step 10 vacuum heat insulating material processing step 11 remanufacturing process 12 refrigerator

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 3H036 AA08 AB18 AB24 AB28 AC01 AE02 AE13 3L045 AA04 AA07 AA08 BA01 CA02 DA01 PA03 PA04 3L102 JA01 LB01 LB02 LB08 LB36 MB16 MB17 MB20 MB23 MB24 4F100 AA37B AK41AABAA ATBAT ATBAABAT ATAKABA00 ATAKAATBAAATBAK BA22 DG03D EH01A EH66C EJ24 EJ59D GB90 JA20D JD02 JJ02 YY00D

Claims (9)

[Claims] 1. A vacuum heat insulating material comprising a sheath material comprising a core material and a laminated film to which a thin film of diamond-like carbon is fixed, wherein the core material is covered with the sheath material and the inside is depressurized. 2. The core material is a polyester fiber aggregate having a diameter of 0.5 denier or less, and the jacket material is a polyester film to which a diamond-like carbon thin film is fixed and a non-stretched polyester film. The described vacuum insulation. 3. A core material and one or both of an inner box and an outer box are formed of a resin-molded face material in which a diamond-like carbon thin film is fixed by post-processing, the core material is covered with the face material, and the inside is depressurized. Vacuum insulator sealed. 4. The core material is a polyester fiber aggregate having a diameter of 0.5 denier or less, and the resin-molded face material is a non-stretched polyester sheet having a diamond-like carbon thin film fixed thereon. Vacuum insulation. 5. A crushing step of crushing a vacuum heat insulating material or a heat insulating box body including a vacuum heat insulating body, and a waste piece crushed by the crushing step is input and sorted into iron, non-ferrous metal, resin dust and the like. A method for treating a heat insulating box, comprising: a sorting step; and a separation step of separating a vacuum heat insulating material or a vacuum heat insulator from the heat insulating box in the crushing step. 6. A crushing step of crushing the heat insulating box body including the vacuum heat insulating material or the vacuum heat insulating body according to claim 2, and a waste piece crushed by the crushing step is charged, A sorting process for sorting into iron, non-ferrous metal, resin dust, etc., a separating process for separating the vacuum heat insulating material or the vacuum heat insulating material from the heat insulating box in the crushing process, and a vacuum heat insulating material collecting as a polyester resin member A method for treating a heat-insulating box, comprising: a process; and a re-production process for obtaining a recycled polyester resin. 7. The vacuum insulation according to claim 2, wherein the polyester resin member obtained by the processing method according to claim 6 is recycled into a polyester material, and is again used as a polyester fiber wool, a polyester film, or a polyester resin molded face material. A vacuum heat insulating material used for the material and the vacuum heat insulator of claim 4, and a method of manufacturing the vacuum heat insulator. 8. A refrigerator displaying a material type of a vacuum heat insulator or a vacuum heat insulator. 9. A refrigerator in which a material type of a vacuum heat insulator or a vacuum heat insulator is recorded.