JP4306271B2 - Method for manufacturing vacuum heat insulating material, vacuum heat insulating material, heat insulating body provided with vacuum heat insulating material, and method for recycling vacuum heat insulating material - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a vacuum heat insulating material, a vacuum heat insulating material, a heat insulating body including a vacuum heat insulating material, and a method for recycling the vacuum heat insulating material.
[0002]
[Prior art]
Until now, various efforts have been made to save energy for various electrical appliances because of the importance of preventing global warming, which is a global environmental problem. Among them, a refrigerator with a large energy consumption is a field in which energy saving is strongly demanded by improving the performance of a heat insulating material.
[0003]
As a conventional highly heat-insulating refrigerator, an energy-saving refrigerator has been devised that achieves higher heat insulating performance by using a vacuum heat insulating material together with foamed urethane as a heat insulating material (see, for example, Patent Document 1).
[0004]
Hereinafter, an energy-saving refrigerator 9 using the above conventional urethane foam and a vacuum heat insulating material in combination will be described with reference to FIG.
[0005]
As shown in FIG. 10, the conventional energy-saving refrigerator 9 has an outer wall 6, an inner wall 7, and a vacuum heat insulating material 10 provided between the inner and outer walls 6, 7, and fixes the vacuum heat insulating material 10 to the outer wall 6. At the same time, a hard foam heat insulating material 8 is filled between the vacuum heat insulating material 10 and the inner wall 7.
[0006]
The refrigerator configured as described above can realize energy saving by using the vacuum heat insulating material 10 having high heat insulating performance.
[0007]
On the other hand, since 1991 when the Recycling Law was enacted for electrical appliances, the Environmental Basic Law was enacted in 1993 and the Home Appliance Recycling Law was enacted in 1993 to introduce a new social system. There is also an increasing demand for the establishment of a recycling society.
[0008]
In a refrigerator that does not include a conventional vacuum heat insulating material, a refrigerator that partially reuses urethane foam as a heat insulating material has been devised (for example, see Patent Document 2).
[0009]
Refrigerators that reuse conventional heat insulating materials use new polyols and recycled polyols recovered from waste refrigerators as raw materials for urethane foam, which is the heat insulating material. A raw material liquid containing a quantity of water is injected and foamed.
[0010]
Since the refrigerator manufactured as described above reuses the foamed urethane lump discharged from the waste refrigerator, a high recycling rate can be realized.
[0011]
[Patent Document 1]
JP 58-106313 A
[Patent Document 2]
JP 2001-183054 A
[0012]
[Problems to be solved by the invention]
However, in the energy-saving refrigerator using the conventional urethane foam and the vacuum heat insulating material together as a heat insulating material, the vacuum heat insulating material is not recycled at present.
[0013]
Originally, vacuum insulation material exhibits high thermal insulation by sealing the core material holding the space to the outer cover material under reduced pressure, and both the outer cover material and the core material are deteriorated in order to be reused. It is essential that there is no.
[0014]
However, when removing vacuum insulation for reuse in refrigerator disposal / recycling work, if the jacket material is torn or the surface is scratched, the internal pressure increases, which may lead to a decrease in insulation performance. is there.
[0015]
Moreover, even if it is a fine crack which cannot be visually confirmed, the internal pressure rises due to the intrusion of outside air very slowly, and the heat insulation performance deteriorates with time. Therefore, it is not preferable to reuse the vacuum heat insulating material as it is after the collection.
[0016]
In addition, if the core material is taken out from the envelope material of the used vacuum heat insulating material for the purpose of reusing the core material, and sealed again with a new outer material under reduced pressure, it is used as a vacuum heat insulating material. It becomes a problem that the foreign matter adhering to the surface of the material becomes a protrusion and damages the jacket material.
[0017]
As a result, pinholes are generated and the heat insulation performance is lowered due to an increase in internal pressure. Therefore, the vacuum heat insulation material that reuses the core material cannot exhibit high heat insulation performance as well.
[0018]
From the above, there was a drawback that the vacuum heat insulating material was not reused after recovery.
[0019]
SUMMARY OF THE INVENTION The present invention solves the conventional problems, and is a method for producing a vacuum heat insulating material that does not impair high heat insulating performance due to damage to the outer jacket material caused by foreign matter on the surface of the core material, and a vacuum heat insulating material produced by the method An object of the present invention is to provide a heat insulator including the vacuum heat insulating material and a method for recycling the vacuum heat insulating material.
[0020]
Moreover, it aims at provision of the manufacturing method of the vacuum heat insulating material which enables reuse of a core material, a vacuum heat insulating material, the heat insulating body which comprises the vacuum heat insulating material, and the recycling method of a vacuum heat insulating material.
[0021]
[Means for Solving the Problems]
The invention of the method for manufacturing a vacuum heat insulating material according to claim 1 of the present invention is a surface foreign material removing step for removing at least the foreign material on the surface of the core material in the manufacturing process of the vacuum heat insulating material comprising the core material and the jacket material. In the manufacturing process, the foreign material on the surface of the core material is removed, and the outer material is prevented from being damaged by the foreign material, whereby the vacuum heat insulating material can be manufactured without impairing the high heat insulating performance.
[0022]
further, Foreign matter removal by gas blowing By It has the effect that foreign matter can be easily removed in a short time.
[0024]
Claim 2 Invention of the manufacturing method of the vacuum heat insulating material described in In the manufacturing process of the vacuum heat insulating material comprising the core material and the jacket material, at least the surface of the core material Adsorb and remove foreign matter by static electricity Has surface foreign matter removal process Is, By removing foreign matter on the surface of the core material in the manufacturing process and preventing damage to the jacket material due to the foreign matter, the vacuum heat insulating material can be manufactured without impairing high heat insulating performance. Furthermore, remove foreign matter by static electricity. In a heat insulator such as a refrigerator that uses a vacuum heat insulating material together with urethane foam, it has the effect of effectively adsorbing and removing urethane scraps and various plastic material scraps that are thought to easily adhere as foreign substances .
[0025]
Moreover, it has the effect | action of preventing the reattachment to the core material surface of the foreign material once removed by this method.
[0026]
Claim 3 Invention of the manufacturing method of the vacuum heat insulating material described in In the manufacturing process of the vacuum heat insulating material comprising the core material and the jacket material, at least the surface of the core material Adsorb and remove foreign matter by magnetic force Has surface foreign matter removal process Is, By removing foreign matter on the surface of the core material in the manufacturing process and preventing damage to the jacket material due to the foreign matter, the vacuum heat insulating material can be manufactured without impairing high heat insulating performance. In addition, foreign matter can be removed by adsorption using magnetic force. In particular, it has an effect of effectively adsorbing and removing metals that are likely to cause pinholes.
[0027]
Moreover, it has the effect | action of preventing reattachment to the core material surface of the foreign material once removed.
[0028]
Claim 4 Invention of the manufacturing method of the vacuum heat insulating material described in In the manufacturing process of the vacuum heat insulating material consisting of the core material and the jacket material, it has a surface foreign material removal step of removing at least the foreign material on the surface of the core material, The core material is a core material taken out of the vacuum heat insulating material of the discarded heat insulator, By removing foreign matter on the surface of the core material in the manufacturing process and preventing damage to the jacket material due to the foreign matter, the vacuum heat insulating material can be manufactured without impairing high heat insulating performance. further, By reusing the core material, it is possible to recycle the vacuum heat insulating material, which has been difficult until now, and to reduce the burden on global environmental problems due to waste reduction.
[0029]
In addition, by reusing the core material, the core material forming step of molding the core material from the core material, which is an essential process for manufacturing the vacuum heat insulating material, can be omitted, so the material cost of the vacuum heat insulating material can be reduced. It has the action.
[0030]
Claim 5 The invention of the vacuum heat insulating material according to claim 1 to claim 1 4 Since the foreign material on the surface of the core material is removed in the manufacturing process, the high heat insulating performance is not impaired over a long period of time. Have.
[0031]
Further, by reusing the core material, it is possible to recycle the vacuum heat insulating material, which has been difficult until now, and to reduce the burden on the global environmental problems due to the reduction of waste.
[0032]
In addition, by reusing the core material, the core material forming step of molding the core material from the core material, which is an essential process for manufacturing the vacuum heat insulating material, can be omitted, so the material cost of the vacuum heat insulating material can be reduced. It has the action.
[0033]
Claim 6 The invention of the thermal insulator according to claim 1 to claim 1 4 A vacuum heat insulating material manufactured by the method for manufacturing a vacuum heat insulating material described above, and having high heat insulating performance by removing foreign matter on the surface of the core material in the manufacturing process and preventing damage to the outer cover material by the foreign matter Since the heat insulating body is provided with a vacuum heat insulating material that does not impair the heat resistance, the heat insulating body having a high heat insulating effect can be manufactured.
[0034]
In addition to the above actions, since the vacuum heat insulating material provided in the heat insulating body reuses the core material, the action of reducing the burden on the global environment due to waste reduction and improving the recycling rate of the heat insulating body can be achieved. Have
[0035]
In addition, it is an indispensable process for producing a vacuum heat insulating material, and since the core material forming step of forming the core material from the core material can be omitted, the material cost of the vacuum heat insulating material can be reduced and the cost of the heat insulating body can be reduced. There is an effect.
[0036]
Claim 7 The invention of the method for recycling a vacuum heat insulating material according to claim 1, a recovery step of recovering the vacuum heat insulating material from the heat insulator provided with the vacuum heat insulating material, and a core material removing step of extracting the core material from the vacuum heat insulating material recovered by the recovery step A surface foreign matter removing step for removing foreign matter on the surface of the core material taken out by the core material taking-out step, and a vacuum again by enclosing the core material from which the foreign matter has been removed by the surface foreign matter removing step under a reduced pressure. A recycled vacuum heat insulating material manufacturing process for manufacturing a heat insulating material, and a recycled vacuum heat insulating material mounting process for mounting the recycled vacuum heat insulating material manufactured by the recycled vacuum heat insulating material manufacturing process on the heat insulating body again; After the body disposal, the process returns to the recovery process for recovering the vacuum insulation material again, and these processes are repeated. Was removed, to prevent damage to the enveloping member due to foreign matter, such an action can be recycled to the vacuum heat insulating material without impairing the high heat insulating performance.
[0037]
Further, in addition to the above-described action, by reusing the core material, it is possible to recycle the vacuum heat insulating material, which has been difficult until now, and to reduce the burden on the global environmental problems due to the reduction of waste.
[0038]
In addition, by reusing the core material, the core material forming step of molding the core material from the core material, which is an essential process for manufacturing the vacuum heat insulating material, can be omitted, so the material cost of the vacuum heat insulating material can be reduced. It has the action.
[0039]
In addition, because it is a manufacturing method characterized by cyclically repeating the process from the collection of insulation to the production, it can cope with the resource depletion problem and can greatly contribute to the construction of a recycling society that is currently strongly demanded. is there.
[0040]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of a vacuum heat insulating material, a method for manufacturing a vacuum heat insulating material, a heat insulating body provided with a vacuum heat insulating material, and a method for recycling a vacuum heat insulating material according to the present invention will be described with reference to the drawings.
[0041]
The present invention is not limited to the following embodiment, and the vacuum heat insulating material that does not impair high heat insulating performance by including at least a surface foreign matter removing step in the manufacturing method of the vacuum heat insulating material, and the recycle vacuum The heat insulating material can be manufactured, and the surface foreign matter removal of the core material may be performed by any method.
[0042]
The heat insulator in the present invention includes all products having heat insulating materials such as a refrigerator, a cooler box, a vending machine, a microwave oven, and a building material.
[0043]
The vacuum heat insulating material in the present invention is composed of a core material and a jacket material, and the core material is sealed in the jacket material under reduced pressure. Also, moisture adsorbents such as physical adsorbents such as synthetic zeolite, activated carbon, activated alumina, silica gel, dosonite, hydrotalcite, and chemical adsorbents such as oxides and hydroxides of alkali metals and alkaline earth metals Alternatively, a gas adsorbent may be used. Moreover, you may add the drying process of a core material, before sealing under pressure reduction.
[0044]
The recycled vacuum heat insulating material in the present invention refers to a vacuum heat insulating material manufactured by reusing the core material of the vacuum heat insulating material recovered from the used heat insulating material. After recovering the vacuum insulation material, the outer jacket material may be used as it is as a recycled vacuum insulation material, but if the outer jacket material is torn or the surface is damaged in the recovery process, the internal pressure will increase and the insulation performance will be reduced. This is not preferable because it may cause a decrease.
[0045]
The core material in the present invention is a component for enlarging the space in a reduced pressure state in the vacuum heat insulating material, and fibers, powders, porous foams and the like composed of inorganic components can be used.
[0046]
For example, as the fibers, fiberized inorganic materials such as glass wool and ceramic fiber lock rules can be used. Moreover, the shape of a nonwoven fabric, a woven fabric, a cotton shape, etc. is not insignificant.
[0047]
Further, an organic binder may be used in order to make inorganic fibers an aggregate. As the powder, powdered inorganic materials such as agglomerated silica powder, foamed perlite ground powder, diatomaceous earth powder, calcium silicate powder, calcium carbonate powder, clay and talc can be used. Moreover, as a porous body, inorganic oxide airgels, such as a silica airgel and an alumina airgel, etc. are applicable. Moreover, these 2 or more types of mixtures may be sufficient.
[0048]
The jacket material in the present invention is one that suppresses outside air from entering the inside of the vacuum heat insulating material, and one that can block the core material from the outside air can be used. For example, a metal thin plate such as stainless steel, aluminum, or iron, or a laminate material of a metal thin plate and a plastic film.
[0049]
The laminate material is preferably composed of a surface protective layer, a gas barrier layer, and a heat welding layer.
[0050]
As the surface protective layer, a polyethylene terephthalate film, a polypropylene film or the like can be stretched. Further, when a nylon film or the like is provided on the outer side, flexibility is improved and bending resistance is improved.
[0051]
As the gas barrier layer, a metal foil film such as aluminum or a metal vapor deposition film can be used. However, a metal vapor deposition film is preferable in order to further suppress heat leak and exhibit an excellent heat insulating effect. Vapor deposition on a polyethylene terephthalate film, an ethylene / vinyl alcohol copolymer resin film, a polyethylene naphthalate film or the like is preferable.
[0052]
Moreover, as a heat welding layer, a low density polyethylene film, a high density polyethylene film, a polypropylene film, a polyacrylonitrile film, a non-ductile polyethylene terephthalate film, etc. can be used.
[0053]
The foreign matter in the present invention is a substance that adheres to the surface of the core material for some reason before sealing the core material with the jacket material, and includes dust and dust in the atmosphere. In addition, when considering collecting the vacuum heat insulating material after crushing a discarded heat insulator such as a refrigerator and taking out the core material, plastic resins, metals, urethane foam and the like are mainly considered as foreign substances.
[0054]
(Embodiment 1)
FIG. 1 is a flowchart showing the first embodiment, and shows steps from forming a vacuum heat insulating material to mounting a vacuum heat insulating material on a heat insulator. The process will be described below with reference to the flowchart of FIG.
[0055]
First, in step 1 (step is described as S in the figure), a core material is formed from the core material of the vacuum heat insulating material.
[0056]
Next, in Step 2, the surface foreign matter of the core formed in Step 1 is removed.
[0057]
Next, in step 3, a vacuum heat insulating material is manufactured by sealing the core material from which the surface foreign matter has been removed in step 2 to a jacket material under reduced pressure.
[0058]
Next, in step 4, the vacuum heat insulating material manufactured in step 3 is mounted on the heat insulator.
[0059]
In the present embodiment, in the manufacturing process of the vacuum heat insulating material as shown in FIG. 1, the foreign material is removed from the surface of the core material of the vacuum heat insulating material by having the foreign material removing step on the surface of the core material in step 2. By preventing damage to the jacket material due to foreign matters, a method for manufacturing a vacuum heat insulating material that does not impair high heat insulating performance can be obtained.
[0060]
The foreign matter removing step in the present invention is a step of removing the foreign matter on the surface of the core material, and a method such as blowing off, sucking, or adsorbing the foreign matter is used. Moreover, you may combine each method according to the kind and condition of the foreign material to remove.
[0061]
Further, in the manufacturing process of the vacuum heat insulating material, including the surface foreign matter removing step of the core material in step 2 is also useful when the core material is reused.
[0062]
(Embodiment 2)
FIG. 2 is a flowchart showing the second embodiment, and shows steps from forming the vacuum heat insulating material to mounting the vacuum heat insulating material on the heat insulating body. The process will be described below with reference to the flowchart of FIG.
[0063]
First, in step 1, a core material is formed from the core material of the vacuum heat insulating material.
[0064]
Next, in step 2, surface foreign matter removal of the core material formed in step 1 is performed by gas blowing.
[0065]
Next, in Step 3, a vacuum heat insulating material is manufactured by sealing the core material from which the surface foreign matter has been removed in Step 2 to a jacket material under reduced pressure.
[0066]
Next, in step 4, the vacuum heat insulating material manufactured in step 3 is mounted on the heat insulator.
[0067]
In the present embodiment, in the manufacturing process of the vacuum heat insulating material as shown in FIG. 2, the foreign material on the surface of the core material in step 2 is removed to remove the surface foreign material on the core material of the vacuum heat insulating material by gas blowing. By preventing damage to the jacket material due to foreign matter on the surface of the material, it is possible to obtain a method for manufacturing a vacuum heat insulating material without impairing high heat insulating performance.
[0068]
Further, in step 2, foreign matter can be easily removed in a short time by gas blowing.
[0069]
Further, in the manufacturing process of the vacuum heat insulating material, including the surface foreign matter removing step of the core material in step 2 is also useful when the core material is reused.
[0070]
As a method of blowing off the foreign material, there is a method of blowing a gas on the surface of the core material and removing the foreign material by the gas pressure. Install the gas outlet so that it is as close as possible to the core without touching the surface of the core, move the core or the outlet nozzle while blowing the gas, and make sure that the gas outlet is all of the core. The foreign material on the surface of the core is sprayed and removed by spreading over the surface. As the gas is sprayed from an angle closer to the direction parallel to the surface of the core material, the foreign matter is more easily removed.
[0071]
In addition, the type of gas in this case is not particularly specified as long as it does not include foreign matters, and usually air is used.
[0072]
As for the blowing gas pressure, it can be used by blowing a gas with a wind speed of 2 m / s or more, but if a relatively large or heavy object is included as a foreign matter, it is blown at a wind speed of 4 m / s or more. Is preferred.
[0073]
Further, a foreign matter suction port may be provided on the opposite side corresponding to the blowout nozzle, so that the blown foreign matter may be collected.
[0074]
(Embodiment 3)
FIG. 3 is a flowchart showing the third embodiment, and shows steps from forming the vacuum heat insulating material to mounting the vacuum heat insulating material on the heat insulating body. The process will be described below with reference to the flowchart of FIG.
[0075]
First, in step 1, a core material is formed from the core material of the vacuum heat insulating material.
[0076]
Next, in step 2, surface foreign matter removal of the core material molded in step 1 is performed by suction.
[0077]
Next, in Step 3, a vacuum heat insulating material is manufactured by sealing the core material from which the surface foreign matter has been removed in Step 2 to a jacket material under reduced pressure.
[0078]
Next, in step 4, the vacuum heat insulating material manufactured in step 3 is mounted on the heat insulator.
[0079]
In the present embodiment, in the manufacturing process of the vacuum heat insulating material as shown in FIG. 3, the foreign material is removed from the surface of the core material of the vacuum heat insulating material by having the foreign material removing step on the surface of the core material in step 3. By preventing damage to the jacket material due to foreign matters, a method for manufacturing a vacuum heat insulating material that does not impair high heat insulating performance can be obtained.
[0080]
Further, in Step 2, since the foreign matter is sucked and removed by suction, the removed foreign matter can be prevented from reattaching to the core material.
[0081]
Further, in the manufacturing process of the vacuum heat insulating material, including the surface foreign matter removing step of the core material in step 2 is also useful when the core material is reused.
[0082]
In addition, as a method of sucking foreign matter, there is a method of removing foreign matter by sucking air on the surface of the core material. Install the suction port so that it is as close as possible to the core material as long as it does not contact the core material surface, move either the core material or the suction port, and spread the suction port over the entire surface of the core material. Thus, the foreign material on the surface of the core material is removed by suction. The pressure in this case varies depending on the size of the suction port. Generally, it can be used with suction at a wind speed of 2 m / s or more as in the case of gas blowing. However, if a relatively large or heavy object is included as a foreign object, It is preferable to suck at a wind speed of 4 m / s or more.
[0083]
(Embodiment 4)
FIG. 4 is a flowchart showing the fourth embodiment, and shows steps from forming a vacuum heat insulating material to mounting a vacuum heat insulating material on a refrigerator. The process will be described below with reference to the flowchart of FIG.
[0084]
First, in step 1, a core material is formed from the core material of the vacuum heat insulating material.
[0085]
Next, in Step 2, the surface foreign matter removal of the core material molded in Step 1 is performed by electrostatic adsorption removal.
[0086]
Next, in Step 3, a vacuum heat insulating material is manufactured by sealing the core material from which the surface foreign matter has been removed in Step 2 to a jacket material under reduced pressure.
[0087]
Next, in step 4, the vacuum heat insulating material manufactured in step 3 is mounted on the refrigerator.
[0088]
In the present embodiment, in the manufacturing process of the vacuum heat insulating material as shown in FIG. 4, the surface foreign material is removed from the surface of the core material of the vacuum heat insulating material by having the foreign material removing step on the surface of the core material in step 2. By preventing damage to the jacket material due to foreign matters, a method for manufacturing a vacuum heat insulating material that does not impair high heat insulating performance can be obtained.
[0089]
Also, in step 2, in order to absorb and remove foreign matter by static electricity, in a heat insulator such as a refrigerator that uses a vacuum heat insulating material in combination with foamed urethane, urethane waste and various plastic material waste considered to be easily attached as foreign matter Can be effectively adsorbed and removed.
[0090]
Further, in Step 2, since the foreign matter is adsorbed and removed by static electricity, it is possible to prevent the foreign matter once removed from being reattached to the core material.
[0091]
Further, in the manufacturing process of the vacuum heat insulating material, including the surface foreign matter removing step of the core material in step 2 is also useful when the core material is reused.
[0092]
As a method for removing the foreign matter by static electricity, there is a removal method for adsorbing the foreign matter from the surface of the core material to the charging side. In this case, a charged portion is provided by using a static electricity generator or the like, and when the core material passes near the charging portion, the foreign material is sucked to the charging side, and the foreign material on the surface of the core material is absorbed and removed.
[0093]
In addition, it is preferable that the distance between the core material surface and the charging portion is as close as possible from the point of adsorption power, but if the distance is too close, the core material may be damaged. Therefore, the distance from the core material surface should be 5 mm or more. Better. The output of the static electricity generator can be used at a voltage of ± 7 kV or higher. However, when it is desired to remove a relatively heavy foreign substance, the output is preferably set to ± 15 kV or higher.
[0094]
In addition, in the case where the foreign matter includes those that are difficult to be charged by static electricity, the foreign matter may be removed in combination with other methods such as gas blowing, suction, magnetic force and the like.
[0095]
(Embodiment 5)
FIG. 5 is a flowchart showing the fifth embodiment, and shows the steps from forming the core material of the vacuum heat insulating material to mounting the vacuum heat insulating material on the heat insulating body. The process will be described below with reference to the flowchart of FIG.
[0096]
First, in step 1, a core material is formed from the core material of the vacuum heat insulating material.
[0097]
Next, in Step 2, the surface foreign matter is removed from the core material formed in Step 1 by adsorption removal by magnetic force.
[0098]
Next, in step 3, a vacuum heat insulating material is manufactured by sealing the core material from which the surface foreign matter has been removed in step 2 to a jacket material under reduced pressure.
[0099]
Next, in step 4, the vacuum heat insulating material manufactured in step 3 is mounted on the heat insulator.
[0100]
In this embodiment, in the manufacturing process of the vacuum heat insulating material as shown in FIG. 5, the foreign material is removed from the surface of the core material of the vacuum heat insulating material by having the foreign material removing step on the surface of the core material in step 2. By preventing damage to the jacket material due to foreign matters, a method for manufacturing a vacuum heat insulating material that does not impair high heat insulating performance can be obtained.
[0101]
Further, in Step 2, since foreign matter is adsorbed and removed by magnetic force, it has an effect that metals that are likely to cause pinholes can be effectively adsorbed and removed.
[0102]
Further, in step 2, since the foreign matter is attracted and removed by magnetic force, the foreign matter once removed can be prevented from reattaching to the core material.
[0103]
Further, in the manufacturing process of the vacuum heat insulating material, including the surface foreign matter removing step of the core material in step 2 is also useful when the core material is reused.
[0104]
As a method for removing the foreign matter by magnetic force, there is a removal method for attracting the foreign matter from the core material surface to the magnetic side. In this case, using a magnet or the like, a magnetic field having a magnetic flux density of 1500 G or more is provided according to the surface area of the core material, and the surface foreign material is adsorbed and removed by passing the core material there.
[0105]
In addition, it is preferable that the distance between the core material surface and the charging portion is as close as possible from the point of adsorbing power. However, if the distance is too close, the core material may be damaged. Therefore, the distance from the core material surface should be 5 mm or more. Better.
[0106]
In addition, when a foreign object such as aluminum that is less likely to be adsorbed by magnetic force than iron is used, it is preferable to use a strong magnet having a magnetic flux density of 5000 G or more.
[0107]
In addition, in the case where the foreign matters include those that are difficult to react by magnetic force, the foreign matters may be removed in combination with other methods such as gas blowing, suction, or static electricity.
[0108]
(Embodiment 6)
FIG. 6 is a flowchart showing the sixth embodiment, and shows the steps from collecting the vacuum heat insulating material from the discarded heat insulating material to manufacturing the recycled vacuum heat insulating material again and mounting it on the heat insulating material. The process will be described below with reference to the flowchart of FIG.
[0109]
First, in step 1, a vacuum heat insulating material is collect | recovered from the discarded heat insulating body.
[0110]
Next, in step 2, the core material is taken out from the envelope of the vacuum heat insulating material collected in step 1.
[0111]
Next, in Step 3, the surface foreign matter of the core material taken out in Step 2 is removed.
[0112]
Next, in Step 4, a recycled vacuum heat insulating material is manufactured by sealing the core material from which the surface foreign matter has been removed in Step 3 with a jacket material under reduced pressure.
[0113]
Next, in step 5, the recycled vacuum heat insulating material manufactured in step 4 is mounted on the heat insulator.
[0114]
In the present embodiment, in the manufacturing process of the recycled vacuum heat insulating material as shown in FIG. 6, the foreign material on the surface of the core material is removed by having the foreign material removal step on the surface of the core material in step 3, and By preventing damage to the workpiece, it is possible to obtain a method for producing a recycled vacuum heat insulating material that does not impair high heat insulating performance.
[0115]
Further, the core material taken out in Step 2 is not deteriorated because it is covered with the jacket material, and can be reused as a recycled vacuum heat insulating material by using a manufacturing process as shown in FIG.
[0116]
Note that the foreign matter removing step of Step 3 may be performed by combining the manufacturing methods of the first to fifth embodiments according to the foreign matter desired to be removed.
[0117]
(Embodiment 7)
FIG. 7 is a cross-sectional view of the recycled vacuum heat insulating material 1 according to the seventh embodiment of the present invention.
[0118]
The recycled vacuum heat insulating material configured as shown in FIG. 7 removes the used core material 2 of the vacuum heat insulating material collected from the discarded heat insulating material, and then removes the foreign material from the surface of the core material. It is manufactured by reusing the core material taken out by sealing to the material 3.
[0119]
In this embodiment, in the manufacturing process of the vacuum heat insulating material, the foreign material on the surface of the core material is removed to remove the surface foreign material on the core material of the vacuum heat insulating material, and the outer surface material is damaged by the foreign material on the surface of the core material. By preventing the above, it is possible to obtain a recycled vacuum heat insulating material that does not impair the high heat insulating performance.
[0120]
Since the core material taken out was covered with the jacket material, there was no deterioration, and excellent heat insulation performance could be ensured even when used in a recycled vacuum heat insulating material as shown in FIG.
[0121]
If the core material taken out seems to be deformed, it may be used after being subjected to press molding.
[0122]
(Embodiment 8)
FIG. 8 is a cross-sectional view of the refrigerator 4 provided with the recycle vacuum heat insulating material according to the eighth embodiment of the present invention.
[0123]
As shown in FIG. 8, a refrigerator (heat insulator) 4 having a recycled vacuum heat insulating material has an outer wall 6, an inner wall 7, and a recycled vacuum heat insulating material 5 provided between the inner and outer walls 6, 7. The material 5 is fixed to the outer wall 6 and a hard foam heat insulating material is filled between the vacuum heat insulating material 5 and the inner wall 7.
[0124]
Recycled vacuum heat insulating material 5 mounted on the refrigerator shown in FIG. 8 removes the core material of the vacuum heat insulating material collected from the discarded refrigerator, and then removes the foreign material on the surface of the core material. The core material taken out is reused by sealing.
[0125]
In this embodiment, in the manufacturing process of the vacuum heat insulating material, the foreign material on the surface of the core material is removed to remove the surface foreign material on the core material of the vacuum heat insulating material, and the outer surface material is damaged by the foreign material on the surface of the core material. By preventing the above, it is possible to obtain a recycled vacuum heat insulating material that does not impair the high heat insulating performance.
[0126]
Since the extracted core material is not deteriorated because it is covered with the jacket material, it can be used for the recycled vacuum heat insulating material mounted in the refrigerator of FIG. The refrigerator made has a high thermal insulation effect.
[0127]
(Embodiment 9)
FIG. 9 is a flowchart showing the ninth embodiment. After collecting the vacuum heat insulating material from the discarded heat insulating material and collecting the core material, manufacturing the recycled vacuum heat insulating material again, mounting it on the heat insulating material, and again the waste material Thus, the vacuum insulation material recycling method is shown in which the insulation is recovered and the vacuum insulation material is recycled. The process will be described below with reference to the flowchart of FIG.
[0128]
First, in step 1, a vacuum heat insulating material is collect | recovered from the discarded heat insulating body.
[0129]
Next, in Step 2, the core material is taken out from the vacuum heat insulating material collected in Step 1.
[0130]
Next, in Step 3, the surface foreign matter of the core material taken out in Step 2 is removed.
[0131]
Next, in step 4, a recycled vacuum heat insulating material is manufactured using the core material from which the surface foreign matter has been removed in step 3.
[0132]
Next, in step 5, the recycled vacuum heat insulating material manufactured in step 4 is mounted on the heat insulator. Then, after the heat insulating body is recovered as a waste material, the process returns to Step 1 and the manufacturing process of the heat insulating body is sequentially repeated in an annular shape. Thereby, the recycling method of a vacuum heat insulating material like FIG. 9 can be obtained.
[0133]
In the present embodiment, in the vacuum heat insulating material recycling method as shown in FIG. 9, the foreign material on the surface of the core material is removed by the step 3 of removing the foreign material on the surface of the core material. By preventing damage to the material, a recycled vacuum heat insulating material that does not impair high heat insulating performance can be obtained.
[0134]
Further, the core material taken out in step 2 is not deteriorated because it is covered with the jacket material, and can be reused as a recycled vacuum heat insulating material by using a recycling method as shown in FIG.
[0135]
【The invention's effect】
As described above, since the invention described in claim 1 has a foreign matter removing step in the manufacturing process of the vacuum heat insulating material, it is high by preventing damage to the jacket material due to foreign matter on the surface of the core material. A method for manufacturing a vacuum heat insulating material that does not impair the heat insulating performance can be obtained.
[0136]
In addition, including a foreign matter removing step in the manufacturing process of the vacuum heat insulating material is also useful when the recovered core material of the vacuum heat insulating material is reused.
[0137]
Also, Performing the foreign substance removal process by gas blowing so, There is an effect that foreign matter can be easily removed in a short time.
[0139]
Claim 2 The invention described in Since there is a foreign matter removal step in the vacuum heat insulating material manufacturing process, a method for manufacturing a vacuum heat insulating material that does not impair high heat insulating performance by preventing damage to the jacket material due to foreign material on the surface of the core material Obtainable. further, Perform foreign matter removal process by static electricity so, There is an effect that it is possible to effectively adsorb and remove urethane scraps and various plastic material scraps that are considered to be most likely to adhere as foreign substances.
[0140]
Claim 3 The invention described in Since there is a foreign matter removal step in the vacuum heat insulating material manufacturing process, a method for manufacturing a vacuum heat insulating material that does not impair high heat insulating performance by preventing damage to the jacket material due to foreign material on the surface of the core material Obtainable. further, Performing the foreign matter removal process by magnetic force so, This has the effect of effectively adsorbing and removing metals that are most likely to cause pinholes.
[0141]
Claim 4 The invention described in In the manufacturing process of the vacuum heat insulating material consisting of the core material and the jacket material, it has a surface foreign material removal step of removing at least the foreign material on the surface of the core material, Since the vacuum insulation material is manufactured using the recovered core material, it is possible to recycle the vacuum insulation material, which has been difficult until now, and the effect of reducing the burden on global environmental problems by reducing waste. is there.
[0142]
In addition, by reusing the core material, the core material forming process for forming the core material from the core material, which is an essential process for manufacturing the vacuum heat insulating material, can be omitted, thus simplifying the manufacturing process of the vacuum heat insulating material. And there is an effect that the material cost can be reduced.
[0143]
Claim 5 The invention described in claim 1 to claim 1 4 Since it is a vacuum heat insulating material manufactured by the method of the present invention, there is an effect that it is possible to reduce the burden on the global environmental problem due to the reduction of waste.
[0144]
In addition, since it is a recycled vacuum heat insulating material that reuses the core material, the core material forming step of forming the core material from the core material, which is an essential process for manufacturing the vacuum heat insulating material, can be omitted, and the vacuum heat insulating material is manufactured. The process can be simplified and the material cost can be reduced.
[0145]
Claim 6 The invention described in claim 1 is a heat insulator. 4 Recycled vacuum heat insulating material that reuses the core material in the invention of this invention is not only a heat insulator with a high heat insulating effect, but also reduces the burden on global environmental problems by reducing waste, and improves the recycling rate Is possible.
[0146]
In addition, by reusing the core material, the core material forming process for forming the core material from the core material, which is an essential process for manufacturing the vacuum heat insulating material, can be omitted, thus simplifying the manufacturing process of the vacuum heat insulating material. And material costs can be saved, and as a result, the cost of the insulation can be reduced.
[0147]
Claim 7 The method for recycling a vacuum heat insulating material in the invention described in the invention includes a vacuum heat insulating material recovery step, a core material removal step, a surface foreign matter removal step, a recycle vacuum heat insulating material manufacturing step, a recycle vacuum heat insulating material mounting step in the heat insulator manufacturing process. After that, after returning to the used heat insulator, the process returns to the recovery process for recovering the vacuum heat insulating material again, and since these steps are repeated, a method for producing a vacuum heat insulating material that does not impair the high heat insulating performance is obtained. As well as being able to recycle vacuum insulation, which has been difficult until now, it is possible to reduce the burden on global environmental problems by reducing waste.
[0148]
In addition, since it is a recycled vacuum heat insulating material that reuses the core material, the core material forming step of forming the core material from the core material, which is an essential process for manufacturing the vacuum heat insulating material, can be omitted, and the vacuum heat insulating material is manufactured. The process can be simplified and the material cost can be reduced.
[0149]
In addition, these manufacturing processes are repeated cyclically from the collection of insulation to the installation of recycle vacuum insulation, thus addressing the resource depletion problem and making a significant contribution to the construction of a recycling society that is currently strongly demanded. .
[Brief description of the drawings]
FIG. 1 is a flowchart of Embodiment 1 of a method for manufacturing a vacuum heat insulating material according to the present invention.
FIG. 2 is a flowchart of Embodiment 2 of a method for manufacturing a vacuum heat insulating material according to the present invention.
FIG. 3 is a flowchart of Embodiment 3 of a method for manufacturing a vacuum heat insulating material according to the present invention.
FIG. 4 is a flowchart of Embodiment 4 of a method for manufacturing a vacuum heat insulating material according to the present invention.
FIG. 5 is a flowchart of Embodiment 5 of a method for manufacturing a vacuum heat insulating material according to the present invention.
FIG. 6 is a flowchart of Embodiment 6 of a method for manufacturing a vacuum heat insulating material according to the present invention.
FIG. 7 is a cross-sectional view of a seventh embodiment of the recycled vacuum heat insulating material according to the present invention.
FIG. 8 is a cross-sectional view of an eighth embodiment of a heat insulator including a recycled vacuum heat insulating material according to the present invention.
FIG. 9 is a flowchart of Embodiment 9 of a vacuum insulation material recycling method according to the present invention.
FIG. 10 is a sectional view of a refrigerator using a conventional urethane foam and a vacuum heat insulating material in combination.
[Explanation of symbols]
1 Recycled vacuum insulation
2 Used core material
3 Jacket material
4 Refrigerators (insulators) with recycled vacuum insulation
5 Recycled vacuum insulation

Claims (7)

In the manufacturing process of a vacuum heat insulating material comprising a core material and a jacket material, a method of manufacturing a vacuum heat insulating material, comprising: removing a foreign material on the surface of the core material by removing at least the foreign material on the surface of the core material by blowing off the gas . In the manufacturing process of the vacuum heat insulating material comprising a core material and the enveloping member, the manufacturing method of the vacuum heat insulating material and having a surface foreign matter removing step of a foreign substance on the surface of the at least the core material for adsorbing and removing the static electricity. In the manufacturing process of the vacuum heat insulating material comprising a core material and the enveloping member, the manufacturing method of the vacuum heat insulating material and having a surface foreign matter removing step of a foreign substance on the surface of the at least the core material for adsorbing and removing a magnetic force. In the manufacturing process of the vacuum heat insulating material composed of the core material and the jacket material, it has a surface foreign material removing step of removing at least the foreign material on the surface of the core material, and the core material is taken out from the vacuum heat insulating material of the discarded heat insulating body. A method for producing a vacuum heat insulating material, characterized by being a core material. The vacuum heat insulating material manufactured by the manufacturing method as described in any one of Claims 1-4 . A heat insulating body comprising a vacuum heat insulating material manufactured by the manufacturing method according to any one of claims 1 to 4 .   A recovery step of recovering the vacuum heat insulating material from the heat insulator provided with the vacuum heat insulating material, a core material extracting step of extracting the core material from the vacuum heat insulating material recovered by the recovery step, and a core material extracted by the core material extracting step A surface foreign matter removing step for removing the foreign matter on the surface, a recycled vacuum heat insulating material producing step for producing a vacuum heat insulating material again by enclosing the core material from which the foreign matter has been removed by the surface foreign matter removing step under a reduced pressure, A recycling vacuum heat insulating material mounting step for mounting the recycled vacuum heat insulating material manufactured in the recycled vacuum heat insulating material manufacturing process again on the heat insulating body, and then recovering the vacuum heat insulating material again after discarding the used heat insulating material The method for recycling the vacuum heat insulating material, wherein the steps are repeated and these steps are repeated.

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