WO2021070221A1 - Glass wool body and production method for vacuum insulation material - Google Patents

Glass wool body and production method for vacuum insulation material Download PDF

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Publication number
WO2021070221A1
WO2021070221A1 PCT/JP2019/039477 JP2019039477W WO2021070221A1 WO 2021070221 A1 WO2021070221 A1 WO 2021070221A1 JP 2019039477 W JP2019039477 W JP 2019039477W WO 2021070221 A1 WO2021070221 A1 WO 2021070221A1
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WO
WIPO (PCT)
Prior art keywords
sheet
glass wool
wool body
laminated
heat insulating
Prior art date
Application number
PCT/JP2019/039477
Other languages
French (fr)
Japanese (ja)
Inventor
貴祥 向山
一正 藤村
浩明 高井
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2019/039477 priority Critical patent/WO2021070221A1/en
Priority to JP2021550954A priority patent/JP7275293B2/en
Priority to CN201980100978.6A priority patent/CN114502868A/en
Publication of WO2021070221A1 publication Critical patent/WO2021070221A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/02—Layered products essentially comprising sheet glass, or glass, slag, or like fibres in the form of fibres or filaments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L59/00—Thermal insulation in general
    • F16L59/06—Arrangements using an air layer or vacuum
    • F16L59/065—Arrangements using an air layer or vacuum using vacuum

Definitions

  • the present invention relates to a glass wool body formed by using dry glass wool and a method for producing a vacuum heat insulating material using the glass wool body as a core material.
  • the core material of the conventional vacuum heat insulating material is formed by cutting either a dry glass wool sheet or a wet glass wool sheet into a specified shape and laminating a plurality of the cut sheets. Then, in the conventional vacuum heat insulating material, the core material thus formed is coated with the outer cover material having a barrier property, the inside of the outer cover material is depressurized, and the core material is sealed with the outer cover material. Manufactured.
  • Dry glass wool is formed by a centrifugal method in which molten glass is made into fibers by blowing it with a centrifugal force using a high-speed rotating spinner.
  • dry glass wool is formed by a flame method in which the tip of a glass rod is melted and blown off by a flame to fibrate the glass. That is, the dry glass wool sheet is a sheet made of a cotton-like material. Therefore, it is difficult to cut a dry glass wool sheet with high dimensional accuracy. Therefore, the core material formed by cutting the dry glass wool sheet has lower dimensional accuracy than the case where the wet glass wool sheet is cut to form the core material. That is, the vacuum heat insulating material using the core material made of dry glass wool has lower dimensional accuracy than the vacuum heat insulating material using the core material made of wet glass wool.
  • the wet glass wool sheet is formed as follows. First, cotton-like glass wool is produced by a centrifugal method or a flame method. Next, this cotton-like glass wool is diffused into the binder solution, and the glass wool in the binder solution is scooped out by a papermaking method. By drying this scooped glass wool, a sheet of wet glass wool is completed. Therefore, the wet glass wool sheet can be cut with higher dimensional accuracy than the dry glass wool sheet. Therefore, the core material formed by cutting the wet glass wool sheet can improve the dimensional accuracy as compared with the case where the dry glass wool sheet is cut to form the core material.
  • the core material formed by cutting a wet glass wool sheet has a higher thermal conductivity than the case where a dry glass wool sheet is cut to form a core material. That is, when the vacuum heat insulating material using the core material made of wet glass wool and the vacuum heat insulating material using the core material made of dry glass wool are compared with the same core material thickness, the core material made of wet glass wool was used.
  • the vacuum heat insulating material has lower heat insulating performance than the vacuum heat insulating material using the core material made of dry glass wool. Therefore, in order to ensure the same heat insulating performance as the vacuum heat insulating material using the dry glass wool core material, the vacuum heat insulating material using the wet glass wool core material is vacuumed using the dry glass wool core material.
  • the thickness of the core material must be larger than that of the heat insulating material.
  • the present invention has been made against the background of the above-mentioned problems, and in a vacuum heat insulating material using a core material in which a sheet made of dry glass wool and a sheet made of non-dry glass wool are laminated, the dimensional accuracy is improved as compared with the conventional case.
  • the first object is to provide a glass wool body that can be used.
  • a second object of the present invention is to provide a method for producing a vacuum heat insulating material using the glass wool body according to the present invention as a core material.
  • the glass wool body according to the present invention includes a first sheet and a laminated sheet having a second sheet laminated on the first sheet, and the first sheet is a sheet in which dry glass wool is formed in a sheet shape.
  • the second sheet is a sheet in which wet glass wool or glass fiber is formed in a sheet shape, and the laminated sheet is rolled in a roll shape so that the second sheet is inside or outside the first sheet.
  • the method for manufacturing the vacuum heat insulating material according to the present invention is a method for manufacturing a vacuum heat insulating material using a plurality of glass wool bodies according to the present invention, in which the plurality of glass wool bodies are stretched and the plurality of laminated sheets are moved up and down.
  • a laminating step of laminating in the direction, a core material forming step of cutting a plurality of the laminated sheets laminated in the laminating step to form a core material, and a coating step of covering the core material with an outer cover material are provided. ing.
  • the core material of the vacuum heat insulating material is produced using the glass wool body according to the present invention
  • the first sheet which is difficult to cut with high dimensional accuracy
  • the second sheet which is wet glass wool or glass fiber.
  • the dimensions of the vacuum heat insulating material using the core material in which the sheet made of dry glass wool and the sheet other than the dry glass wool are laminated are used. The accuracy can be improved as compared with the conventional case.
  • FIG. 1 is a perspective view showing a glass wool body according to the present embodiment.
  • the glass wool body 10 is cut into a specified shape and used as the core material 31 of the vacuum heat insulating material 30.
  • the glass wool body 10 includes a laminated sheet 20.
  • the laminated sheet 20 includes a first sheet 21 and a second sheet 22 stacked on the first sheet 21.
  • the first sheet 21 is a sheet in which dry glass wool is formed in the form of a sheet.
  • Dry glass wool is formed by a centrifugal method in which molten glass is made into fibers by centrifugally blowing the molten glass with a high-speed rotating spinner.
  • dry glass wool is formed by a flame method in which the tip of a glass rod is melted and blown off by a flame to fibrate the glass. That is, the first sheet 21 is a sheet made of a cotton-like material. It is difficult to cut a sheet made of dry glass wool with higher dimensional accuracy than a sheet made of wet glass wool.
  • the second sheet 22 is a sheet in which wet glass wool is formed in the form of a sheet.
  • the wet glass wool sheet is formed as follows. First, cotton-like glass wool is produced by a centrifugal method or a flame method. Next, this cotton-like glass wool is diffused into the binder solution, and the glass wool in the binder solution is scooped out by a papermaking method. By drying this scooped glass wool, a sheet of wet glass wool is completed. The wet glass wool sheet can be cut with higher dimensional accuracy than the dry glass wool sheet. On the other hand, the wet glass wool sheet has lower heat insulating performance than the dry glass wool sheet.
  • the second sheet 22 may be a sheet in which glass fibers are formed in a sheet shape.
  • the glass fiber is a substantially linear glass fiber drawn from a spinning nozzle by a continuous filament method. Similar to the wet glass wool sheet, the glass fiber sheet can be cut with higher dimensional accuracy than the dry glass wool sheet, and the heat insulating performance is lower than that of the dry glass wool sheet.
  • the glass wool body 10 is formed by winding the laminated sheet 20 configured as described above in a roll shape.
  • the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside the first sheet 21.
  • such a configuration is an example of the glass wool body 10 according to the present embodiment.
  • FIG. 2 is a perspective view showing another example of the glass wool body according to the present embodiment.
  • the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is on the outside of the first sheet 21.
  • the glass wool body 10 according to the present embodiment may be configured in this way.
  • FIG. 3 is a flowchart showing a manufacturing process of a glass wool body according to the present embodiment.
  • 4 and 5 are diagrams for explaining a method for producing a glass wool body according to the present embodiment. 4 and 5 show a glass wool body 10 in the middle of winding the laminated sheet 20 in a roll shape.
  • Step S1 of the manufacturing process of the glass wool body 10 is a laminated sheet forming step of forming the laminated sheet 20.
  • the second sheet 22 is laminated on the first sheet 21 to form the laminated sheet 20.
  • the glass wool body 10 shown in FIG. 1 in which the second sheet 22 is wound so as to be inside the first sheet 21 the glass wool body 10 shown in FIG. 1 is manufactured, as shown in FIG. 4, on the upper surface of the first sheet 21.
  • the second sheet 22 is overlapped.
  • the second sheet is formed on the lower surface of the first sheet 21. 22 are piled up.
  • Step S2 of the manufacturing process of the glass wool body 10 is a winding step of winding the laminated sheet 20 formed in the laminated sheet forming step.
  • the glass wool body 10 is completed by winding the laminated sheet 20 formed in the laminated sheet forming step.
  • the laminated sheet 20 shown in FIG. 4 in which the second sheet 22 is superposed on the upper surface of the first sheet 21, the second sheet 22 is wound so as to be inside the first sheet 21.
  • the glass wool body 10 shown in 1 can be produced.
  • a diagram in which the second sheet 22 is wound so as to be outside the first sheet 21 by winding the laminated sheet 20 shown in FIG. 5 in which the second sheet 22 is laminated on the lower surface of the first sheet 21.
  • the glass wool body 10 shown in 2 can be produced.
  • FIG. 6 is a cross-sectional view showing the vacuum heat insulating material according to the present embodiment.
  • the vacuum heat insulating material 30 includes a core material 31 and an outer cover material 32 that covers the core material 31.
  • the space surrounded by the outer cover material 32 that is, the space in which the core material 31 is arranged, is a vacuum space decompressed to a degree of vacuum of, for example, about 1 Pa to 3 Pa.
  • the vacuum space surrounded by the outer cover material 32 is formed by heat-welding the openings with a heat seal or the like while the inside of the bag-shaped outer cover material 32 having a part of opening is depressurized.
  • the vacuum heat insulating material 30 is formed in a substantially rectangular plate shape as a whole, for example, when observed in the thickness direction of the vacuum heat insulating material 30, in other words, when observed in the vertical direction of the paper surface of FIG.
  • the vacuum heat insulating material 30 also includes a water adsorbent 33 that adsorbs water in the vacuum space surrounded by the outer cover material 32. That is, in the vacuum heat insulating material 30 according to the present embodiment, the core material 31 and the moisture adsorbent 33 are covered with the outer cover material 32.
  • the moisture adsorbent 33 By providing the moisture adsorbent 33, the moisture existing in the vacuum space surrounded by the outer cover material 32 is adsorbed by the moisture adsorbent 33, so that the deterioration of the vacuum heat insulating material 30 with time can be suppressed.
  • the core material 31 is formed by laminating a plurality of laminated sheets 20 cut into a specified shape such as a quadrangle in the thickness direction of the vacuum heat insulating material 30. That is, the core material 31 is formed by laminating a plurality of laminated sheets 20 cut into a predetermined shape in the vertical direction of FIG.
  • the outer cover material 32 has a gas barrier property.
  • the outer cover material 32 includes at least a gas barrier layer and a heat welding layer.
  • As the gas barrier layer a plastic film or metal foil on which a metal, a metal oxide, or a diamond-like carbon is vapor-deposited can be used.
  • the metal oxide deposited on the plastic film, metal leaf, etc. is, for example, silica, alumina, or the like.
  • the gas barrier layer of the outer cover material 32 is not particularly limited, and various gas barrier layers conventionally used for the purpose of reducing gas permeation can be used.
  • the heat-welded layer of the outer cover material 32 is a portion that is heat-welded when the outer cover material 32 is formed in a bag shape and when the opening of the bag-shaped outer cover material 32 is closed.
  • the heat-welded portion of the heat-welded layer is shown as the heat-welded portion 34.
  • the heat welding layer is a portion having the highest gas permeability among the layers constituting the outer cover material. Therefore, the properties of the heat-welded layer greatly affect the change in the heat insulating performance of the vacuum heat insulating material 30 over time.
  • the heat-welded layer The thickness is preferably 25 ⁇ m to 60 ⁇ m.
  • a non-stretched polypropylene film, a high-density polyethylene film, a linear low-density polyethylene film, or the like can be used as the heat welding layer.
  • the heat welding layer is not limited to those formed of these materials, and various conventionally used heat welding layers can be used.
  • the outer cover material 32 may further be provided with a surface protective layer on the outside of the gas barrier layer, in other words, on the surface opposite to the core material 31 with respect to the gas barrier layer.
  • a surface protective layer for example, a polyethylene terephthalate film, a polypropylene film, a nylon film or the like can be used.
  • the heat welding layer is not limited to these, and various conventionally used surface protective layers can be used.
  • the water adsorbent 33 is, for example, calcium oxide inserted in a well-ventilated bag.
  • the water adsorbent 33 is not limited to calcium oxide, and is not particularly limited as long as it has water adsorbability such as zeolite.
  • FIG. 7 is a flowchart showing the manufacturing process of the vacuum heat insulating material according to the present embodiment.
  • 8 and 9 are diagrams for explaining the method for manufacturing the vacuum heat insulating material according to the present embodiment.
  • the arcuate arrows shown in FIGS. 8 and 9 indicate the rotation direction of the glass wool body 10 when the glass wool body 10 is extended. Further, the white arrows shown in FIGS. 8 and 9 indicate the advancing direction of the laminated sheet 20 when the glass wool body 10 is stretched.
  • the vacuum heat insulating material 30 is manufactured by using a plurality of glass wool bodies 10.
  • Step S11 of the manufacturing process of the vacuum heat insulating material 30 is a laminating step.
  • the laminating step as shown in FIGS. 8 and 9, a plurality of glass wool bodies 10 are stretched, and the plurality of laminated sheets 20 are laminated in the vertical direction.
  • FIGS. 8 and 9 an example is shown in which four glass wool bodies 10 are stretched and four laminated sheets 20 are overlapped in the vertical direction.
  • Step S12 after step S11 in the manufacturing process of the vacuum heat insulating material 30 is a core material forming step.
  • the core material forming step the plurality of laminated sheets 20 laminated in the laminating step are cut to form the core material 31.
  • the plurality of laminated sheets 20 that are overlapped are cut in the vertical direction. Therefore, the laminating direction of the laminated laminated sheets 20 is the thickness direction of the core material 31. In other words, the laminating direction of the laminated laminated sheets 20 is the thickness direction of the vacuum heat insulating material 30.
  • a core material is formed by laminating a dry glass wool sheet cut into a specified shape and a wet glass wool sheet cut into a specified shape.
  • the dimensional accuracy is worse than when cutting a sheet made of wet glass wool.
  • the dimensions of the dry glass wool sheet cut into the specified shape and the wet glass wool sheet cut into the specified shape do not match, and the dimensional accuracy deteriorates. ..
  • the core material 31 of the vacuum heat insulating material 30 when the core material 31 of the vacuum heat insulating material 30 is prepared, the first sheet 21 which is difficult to cut with high dimensional accuracy can be cut together with the second sheet 22. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, the first sheet 21 which is dry glass wool and the second sheet 22 which is wet glass wool or glass fiber It becomes easy to match the dimensions with. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, a vacuum using a core material in which a sheet made of dry glass wool and a sheet other than dry glass wool are laminated is used. In the heat insulating material, the dimensional accuracy can be improved as compared with the conventional case.
  • each of the sheets cut into a specified shape is laminated after being cut to form a core material. For this reason, in the conventional vacuum heat insulating material, it takes time to laminate each sheet, and the work efficiency when manufacturing the core material is poor.
  • the glass wool body 10 according to the present embodiment by extending the glass wool body 10 according to the present embodiment and cutting the laminated sheet 20 into a predetermined shape, the first sheet 21 and the second sheet 22 are already laminated. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, the time for laminating the sheets constituting the core material 31 can be shortened as compared with the conventional case, and the core material 31 can be shortened. It is possible to improve the work efficiency when manufacturing. In particular, in the case of the method for manufacturing the core material 31 using a plurality of glass wool bodies 10 described in the present embodiment, when the plurality of laminated sheets 20 are cut, all the sheets constituting the core material 31 are formed. Is in a state where the lamination of is completed.
  • the time for laminating the sheets constituting the core material 31 can be further shortened, and the core material 31 can be manufactured. It is possible to further improve the work efficiency when doing so.
  • FIGS. 10 to 12 are diagrams showing the core material of the vacuum heat insulating material according to the present embodiment.
  • the core material 31 shown in FIGS. 10 to 12 is a side view of the core material 31 formed in the core material forming step of step S12.
  • the second sheet 22 is hatched in order to facilitate the distinction between the first sheet 21 and the second sheet 22.
  • a plurality of laminated sheets 20 are laminated in the vertical direction in the laminating step so that the upper surface and the lower surface of the core material 31 formed in the core material forming step become the second sheet 22. That is, the surface of the core material 31 facing the thickness direction of the core material 31 is the second sheet 22. Therefore, in the vacuum heat insulating material 30 according to the present embodiment, the second sheet 22 and the outer cover material 32 are in contact with each other.
  • the surface of the second sheet 22 which is wet glass wool or glass fiber has less unevenness than the surface of the first sheet 21 which is dry glass wool. Therefore, by making the surface of the core material 31 facing in the thickness direction the second sheet 22, the unevenness on the surface of the vacuum heat insulating material 30 becomes less noticeable, and the design of the vacuum heat insulating material 30 is improved.
  • Dry glass wool, wet glass wool and fiberglass contain shots, which are lumps of unstretched glass particles.
  • shots When the shot is in contact with the outer cover material 32, a through hole is formed in the outer cover material 32 by the shot, air enters the inside of the vacuum heat insulating material 30 from the through hole, and the heat insulating performance of the vacuum heat insulating material 30 is improved. May decrease.
  • the amount of shots contained in the wet glass wool and the glass fiber is smaller than the amount of shots contained in the dry glass wool.
  • the surface of the core material 31 facing the thickness direction is made of the second sheet 22 made of wet glass wool or glass fiber, so that the surface of the core material 31 facing the thickness direction is made of the first sheet 21 made of dry glass wool. It is possible to suppress the deterioration of the heat insulating performance of the vacuum heat insulating material 30 due to the shot.
  • the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 is obtained by laminating a plurality of laminated sheets 20 as follows in the laminating step.
  • the glass wool body 10 composed of the laminated sheets 20 arranged at the uppermost position when the plurality of laminated sheets 20 are laminated in the laminating step is referred to as the first glass wool body 11.
  • the glass wool body 10 composed of the laminated sheets 20 arranged at the lowermost position when the plurality of laminated sheets 20 are laminated in the laminating step is referred to as a second glass wool body 12.
  • the laminated sheet 20 of the first glass wool body 11 may have the second sheet 22 located above the first sheet 21 when a plurality of laminated sheets 20 are laminated in the laminating step.
  • the laminated sheet 20 of the second glass wool body 12 may have the second sheet 22 located below the first sheet 21 when a plurality of laminated sheets 20 are laminated in the laminating step.
  • the laminated sheet 20 of the first glass wool body 11 and the laminated sheet 20 of the second glass wool body 12 are laminated in such a posture, so that the surface facing in the thickness direction becomes the second sheet 22. Is obtained.
  • the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside the first sheet 21. It is assumed that it has been done.
  • the first glass wool body 11 and the second glass wool body 12 are stretched in the laminating step, the first glass wool body 11 may rotate in the direction opposite to the rotation direction of the second glass wool body 12. More specifically, when the first glass wool body 11 and the second glass wool body 12 are stretched to the right side of the paper surface as shown in FIG. 8 in the laminating step, the first glass wool body 11 rotates counterclockwise and the second glass wool body 12 Should rotate clockwise. As a result, the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 can be obtained.
  • the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is on the outside of the first sheet 21.
  • the first glass wool body 11 may rotate in the direction opposite to the rotation direction of the second glass wool body 12. More specifically, when the first glass wool body 11 and the second glass wool body 12 are stretched to the right side of the paper surface as shown in FIG. 8 in the laminating step, the first glass wool body 11 rotates clockwise and the second glass wool body 12 Rotate counterclockwise. As a result, the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 can be obtained.
  • the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside the first sheet 21.
  • the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is on the outside of the first sheet 21.
  • the first glass wool body 11 may rotate in the same direction as the rotation direction of the second glass wool body 12. More specifically, when the first glass wool body 11 and the second glass wool body 12 are stretched to the right side of the paper surface as shown in FIG. 9 in the laminating step, the first glass wool body 11 and the second glass wool body 12 rotate counterclockwise. It is good to do it.
  • the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 can be obtained.
  • the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is on the outside of the first sheet 21.
  • the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside the first sheet 21.
  • the first glass wool body 11 may rotate in the same direction as the rotation direction of the second glass wool body 12. More specifically, when the first glass wool body 11 and the second glass wool body 12 are stretched to the right side of the paper surface as shown in FIG. 9 in the laminating step, the first glass wool body 11 and the second glass wool body 12 are rotated clockwise. Good.
  • the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 can be obtained.
  • the second sheet 22 is outside the first sheet 21.
  • the laminated sheet 20 may be wound in a roll shape so as to be, or the laminated sheet 20 may be wound in a roll shape so that the second sheet 22 is inside the first sheet 21. It may be.
  • the rotation direction is particularly high. Not limited. Therefore, as shown in FIGS.
  • the laminated sheet 20 sandwiched between the laminated sheet 20 of the first glass wool body 11 and the laminated sheet 20 of the second glass wool body 12 is located below the first sheet 21.
  • the second sheet 22 may be located, or the second sheet 22 may be located above the first sheet 21.
  • Step S20 after step S12 in the manufacturing process of the vacuum heat insulating material 30 is a coating step of covering the core material 31 with the outer cover material 32.
  • the coating step includes a core material insertion step of step S21, a drying step of step S22, a moisture adsorbent insertion step of step S23, a decompression step of step S24, and a sealing step of step S25.
  • the core material 31 is inserted into the outer cover material 32 formed in the shape of a bag.
  • the bag shape of the outer cover material 32 is not particularly limited, such as the shape of the four-sided seal bag, the shape of the gusset bag, the shape of the three-way seal bag, the shape of the pillow bag, and the shape of the center tape seal bag.
  • the core material 31 and the outer cover material 32 are dried, and moisture is removed from the core material 31 and the outer cover material 32.
  • the core material 31 and the outer cover material 32 are heat-treated at 110 ° C. for about 2 hours with the core material 31 inserted inside the outer cover material 32 formed in the shape of a bag.
  • the conditions for drying the core material 31 and the outer cover material 32 are not particularly limited as long as moisture can be removed from the core material 31 and the outer cover material 32.
  • the moisture adsorbent insertion step of step S23 the moisture adsorbent 33 is inserted into the outer cover material 32 formed in the shape of a bag.
  • the decompression step of step S24 the inside of the outer cover material 32 formed in the bag shape is depressurized to a degree of vacuum of about 1 Pa to 3 Pa.
  • the sealing step of step S25 the opening of the outer cover material 32 formed in the shape of a bag is heat-welded by heat sealing or the like, and the core material 31 and the moisture adsorbent 33 are sealed with the outer cover material 32. ..
  • the position of the water adsorbent insertion step is not limited to the above-mentioned position.
  • the position of the moisture adsorbent insertion step may be before the sealing step.
  • the glass wool body 10 includes a first sheet 21 and a laminated sheet 20 having a second sheet 22 stacked on the first sheet 21.
  • the first sheet 21 is a sheet in which dry glass wool is formed in the form of a sheet.
  • the second sheet 22 is a sheet in which wet glass wool or glass fiber is formed in a sheet shape. Then, in the glass wool body 10, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside or outside the first sheet 21.
  • the core material 31 of the vacuum heat insulating material 30 is produced using the glass wool body 10 according to the present embodiment, the first sheet 21 which is difficult to cut with high dimensional accuracy can be cut together with the second sheet 22. it can. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, the first sheet 21 which is dry glass wool and the second sheet 22 which is wet glass wool or glass fiber It becomes easy to match the dimensions with. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, a vacuum using a core material in which a sheet made of dry glass wool and a sheet other than dry glass wool are laminated is used. In the heat insulating material, the dimensional accuracy can be improved as compared with the conventional case.

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  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Insulation (AREA)

Abstract

This glass wool body comprises a layered sheet that includes a first sheet and a second sheet that is superimposed on the first sheet. The first sheet comprises dry glass wool that has been formed into a sheet, and the second sheet comprises wet glass wool or glass fibers that have been formed into a sheet. The layered sheet is rolled such that the second sheet is on the inside or the outside of the first sheet.

Description

グラスウール体及び真空断熱材の製造方法Manufacturing method of glass wool body and vacuum heat insulating material
　本発明は、乾式グラスウールを用いて形成されたグラスウール体、及び該グラスウール体を芯材として用いた真空断熱材の製造方法に関する。 The present invention relates to a glass wool body formed by using dry glass wool and a method for producing a vacuum heat insulating material using the glass wool body as a core material.
　従来の真空断熱材の芯材は、乾式グラスウール製のシート又は湿式グラスウール製のシートのどちらか一方を規定の形に切断し、切断されたシートを複数枚積層することにより形成されている。そして、従来の真空断熱材は、バリア性を有する外被材でこのように形成された芯材を被覆し、外被材の内部を減圧して芯材を外被材で密封することで、製造される。 The core material of the conventional vacuum heat insulating material is formed by cutting either a dry glass wool sheet or a wet glass wool sheet into a specified shape and laminating a plurality of the cut sheets. Then, in the conventional vacuum heat insulating material, the core material thus formed is coated with the outer cover material having a barrier property, the inside of the outer cover material is depressurized, and the core material is sealed with the outer cover material. Manufactured.
　乾式グラスウールは、溶融ガラスを高速回転スピナにより遠心力で飛ばすことによってガラスを繊維化する遠心法によって、形成される。あるいは、乾式グラスウールは、ガラス棒の先端部を火炎で溶融しながら吹き飛ばすことによりガラスを繊維化する火炎法によって、形成される。すなわち、乾式グラスウール製のシートは、綿状の素材で形成されたシートである。このため、乾式グラスウール製のシートは、寸法精度良く切断することが難しい。したがって、乾式グラスウール製のシートを切断して形成した芯材は、湿式グラスウール製のシートを切断して芯材を形成する場合と比べ、寸法精度が悪くなる。すなわち、乾式グラスウール製の芯材を用いた真空断熱材は、湿式グラスウール製の芯材を用いた真空断熱材と比べ、寸法精度が悪くなる。 Dry glass wool is formed by a centrifugal method in which molten glass is made into fibers by blowing it with a centrifugal force using a high-speed rotating spinner. Alternatively, dry glass wool is formed by a flame method in which the tip of a glass rod is melted and blown off by a flame to fibrate the glass. That is, the dry glass wool sheet is a sheet made of a cotton-like material. Therefore, it is difficult to cut a dry glass wool sheet with high dimensional accuracy. Therefore, the core material formed by cutting the dry glass wool sheet has lower dimensional accuracy than the case where the wet glass wool sheet is cut to form the core material. That is, the vacuum heat insulating material using the core material made of dry glass wool has lower dimensional accuracy than the vacuum heat insulating material using the core material made of wet glass wool.
　一方、湿式グラスウールのシートは、次のように形成される。まず、遠心法又は火炎法によって、綿状のグラスウールを製造する。次に、この綿状のグラスウールをバインダー溶液中に拡散させ、抄造法によってバインダー溶液中のグラスウールをすくい取る。このすくい取られたグラスウールを乾燥させることにより、湿式グラスウールのシートが完成する。このため、湿式グラスウールのシートは、乾式グラスウール製のシートと比べ、寸法精度良く切断することができる。したがって、湿式グラスウール製のシートを切断して形成した芯材は、乾式グラスウール製のシートを切断して芯材を形成する場合と比べ、寸法精度を向上させることができる。 On the other hand, the wet glass wool sheet is formed as follows. First, cotton-like glass wool is produced by a centrifugal method or a flame method. Next, this cotton-like glass wool is diffused into the binder solution, and the glass wool in the binder solution is scooped out by a papermaking method. By drying this scooped glass wool, a sheet of wet glass wool is completed. Therefore, the wet glass wool sheet can be cut with higher dimensional accuracy than the dry glass wool sheet. Therefore, the core material formed by cutting the wet glass wool sheet can improve the dimensional accuracy as compared with the case where the dry glass wool sheet is cut to form the core material.
　一方、湿式グラスウール製のシートを切断して形成した芯材は、乾式グラスウール製のシートを切断して芯材を形成する場合と比べ、熱伝導率が高くなる。すなわち、湿式グラスウール製の芯材を用いた真空断熱材と、乾式グラスウール製の芯材を用いた真空断熱材とを同じ芯材の厚さで比べた場合、湿式グラスウール製の芯材を用いた真空断熱材は、乾式グラスウール製の芯材を用いた真空断熱材と比べ、断熱性能が低くなる。このため、湿式グラスウール製の芯材を用いた真空断熱材は、乾式グラスウール製の芯材を用いた真空断熱材と同等の断熱性能を確保するには、乾式グラスウール製の芯材を用いた真空断熱材よりも芯材の厚みを大きくしなければならない。 On the other hand, the core material formed by cutting a wet glass wool sheet has a higher thermal conductivity than the case where a dry glass wool sheet is cut to form a core material. That is, when the vacuum heat insulating material using the core material made of wet glass wool and the vacuum heat insulating material using the core material made of dry glass wool are compared with the same core material thickness, the core material made of wet glass wool was used. The vacuum heat insulating material has lower heat insulating performance than the vacuum heat insulating material using the core material made of dry glass wool. Therefore, in order to ensure the same heat insulating performance as the vacuum heat insulating material using the dry glass wool core material, the vacuum heat insulating material using the wet glass wool core material is vacuumed using the dry glass wool core material. The thickness of the core material must be larger than that of the heat insulating material.
　そこで、従来の真空断熱材には、規定の形に切断された乾式グラスウール製のシートと規定の形に切断された湿式グラスウール製のシートとを積層して芯材を形成し、寸法精度の向上と断熱性能の低下の抑制とを図ったものも提案されている（特許文献１参照）。 Therefore, in the conventional vacuum heat insulating material, a dry glass wool sheet cut into a specified shape and a wet glass wool sheet cut into a specified shape are laminated to form a core material, thereby improving dimensional accuracy. It has also been proposed to suppress the deterioration of the heat insulating performance (see Patent Document 1).
特開２０１２－１５９１４４号公報Japanese Unexamined Patent Publication No. 2012-159144
　上述のように、特許文献１に記載の真空断熱材では、規定の形に切断された乾式グラスウール製のシートと規定の形に切断された湿式グラスウール製のシートとを積層して、芯材が形成される。このため、特許文献１に記載の真空断熱材は、規定の形に切断された乾式グラスウール製のシートと規定の形に切断された湿式グラスウール製のシートとの寸法が一致せず、依然として寸法精度が悪いという課題があった。 As described above, in the vacuum heat insulating material described in Patent Document 1, a dry glass wool sheet cut into a specified shape and a wet glass wool sheet cut into a specified shape are laminated to form a core material. It is formed. Therefore, in the vacuum heat insulating material described in Patent Document 1, the dimensions of the dry glass wool sheet cut into the specified shape and the wet glass wool sheet cut into the specified shape do not match, and the dimensional accuracy is still high. There was a problem that it was bad.
　本発明は、上述の課題を背景としてなされたものであり、乾式グラスウール製のシートと乾式グラスウール製以外のシートとが積層された芯材を用いる真空断熱材において、寸法精度を従来よりも向上させることができるグラスウール体を提供することを第１の目的とする。また、本発明は、本発明に係るグラスウール体を芯材として用いた真空断熱材の製造方法を提供することを、第２の目的とする。 The present invention has been made against the background of the above-mentioned problems, and in a vacuum heat insulating material using a core material in which a sheet made of dry glass wool and a sheet made of non-dry glass wool are laminated, the dimensional accuracy is improved as compared with the conventional case. The first object is to provide a glass wool body that can be used. A second object of the present invention is to provide a method for producing a vacuum heat insulating material using the glass wool body according to the present invention as a core material.
　本発明に係るグラスウール体は、第１シート及び該第１シートに重ねられた第２シートを有する積層シートを備え、前記第１シートは、乾式グラスウールがシート状に形成されたシートであり、前記第２シートは、湿式グラスウール又はグラスファイバーがシート状に形成されたシートであり、前記第２シートが前記第１シートの内側又は外側となるように前記積層シートがロール状に巻かれている。 The glass wool body according to the present invention includes a first sheet and a laminated sheet having a second sheet laminated on the first sheet, and the first sheet is a sheet in which dry glass wool is formed in a sheet shape. The second sheet is a sheet in which wet glass wool or glass fiber is formed in a sheet shape, and the laminated sheet is rolled in a roll shape so that the second sheet is inside or outside the first sheet.
　また、本発明に係る真空断熱材の製造方法は、本発明に係るグラスウール体を複数用いた真空断熱材の製造方法であって、複数の前記グラスウール体を延ばして、複数の前記積層シートを上下方向に重ね合わせる積層工程と、前記積層工程で重ね合わされた複数の前記積層シートを切断して芯材を形成する芯材形成工程と、前記芯材を外被材で覆う被覆工程と、を備えている。 Further, the method for manufacturing the vacuum heat insulating material according to the present invention is a method for manufacturing a vacuum heat insulating material using a plurality of glass wool bodies according to the present invention, in which the plurality of glass wool bodies are stretched and the plurality of laminated sheets are moved up and down. A laminating step of laminating in the direction, a core material forming step of cutting a plurality of the laminated sheets laminated in the laminating step to form a core material, and a coating step of covering the core material with an outer cover material are provided. ing.
　本発明に係るグラスウール体を用いて真空断熱材の芯材を作成する場合、寸法精度良く切断することが難しい第１シートを、第２シートと一緒に切断することができる。このため、本発明に係るグラスウール体を用いて真空断熱材の芯材を作成することにより、乾式グラスウールである第１シートと、湿式グラスウール又はグラスファイバーである第２シートとの寸法を一致させやすくなる。したがって、本発明に係るグラスウール体を用いて真空断熱材の芯材を作成することにより、乾式グラスウール製のシートと乾式グラスウール製以外のシートとが積層された芯材を用いる真空断熱材において、寸法精度を従来よりも向上させることができる。 When the core material of the vacuum heat insulating material is produced using the glass wool body according to the present invention, the first sheet, which is difficult to cut with high dimensional accuracy, can be cut together with the second sheet. Therefore, by creating the core material of the vacuum heat insulating material using the glass wool body according to the present invention, it is easy to match the dimensions of the first sheet which is dry glass wool and the second sheet which is wet glass wool or glass fiber. Become. Therefore, by creating the core material of the vacuum heat insulating material using the glass wool body according to the present invention, the dimensions of the vacuum heat insulating material using the core material in which the sheet made of dry glass wool and the sheet other than the dry glass wool are laminated are used. The accuracy can be improved as compared with the conventional case.
本実施の形態に係るグラスウール体を示す斜視図である。It is a perspective view which shows the glass wool body which concerns on this embodiment. 本実施の形態に係るグラスウール体の別の一例を示す斜視図である。It is a perspective view which shows another example of the glass wool body which concerns on this embodiment. 本実施の形態に係るグラスウール体の製造工程を示すフローチャートである。It is a flowchart which shows the manufacturing process of the glass wool body which concerns on this embodiment. 本実施の形態に係るグラスウール体の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the glass wool body which concerns on this embodiment. 本実施の形態に係るグラスウール体の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the glass wool body which concerns on this embodiment. 本実施の形態に係る真空断熱材を示す断面図である。It is sectional drawing which shows the vacuum heat insulating material which concerns on this embodiment. 本実施の形態に係る真空断熱材の製造工程を示すフローチャートである。It is a flowchart which shows the manufacturing process of the vacuum heat insulating material which concerns on this embodiment. 本実施の形態に係る真空断熱材の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the vacuum heat insulating material which concerns on this embodiment. 本実施の形態に係る真空断熱材の製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the vacuum heat insulating material which concerns on this embodiment. 本実施の形態に係る真空断熱材の芯材を示す図である。It is a figure which shows the core material of the vacuum heat insulating material which concerns on this embodiment. 本実施の形態に係る真空断熱材の芯材を示す図である。It is a figure which shows the core material of the vacuum heat insulating material which concerns on this embodiment. 本実施の形態に係る真空断熱材の芯材を示す図である。It is a figure which shows the core material of the vacuum heat insulating material which concerns on this embodiment.
実施の形態．
　図１は、本実施の形態に係るグラスウール体を示す斜視図である。
　グラスウール体１０は、後述のように、規定の形に切断され、真空断熱材３０の芯材３１として用いられるものである。グラスウール体１０は、積層シート２０を備えている。また、積層シート２０は、第１シート２１と、該第１シート２１に重ねられた第２シート２２とを備えている。 Embodiment.
FIG. 1 is a perspective view showing a glass wool body according to the present embodiment.
As will be described later, the glass wool body 10 is cut into a specified shape and used as the core material 31 of the vacuum heat insulating material 30. The glass wool body 10 includes a laminated sheet 20. Further, the laminated sheet 20 includes a first sheet 21 and a second sheet 22 stacked on the first sheet 21.
　第１シート２１は、乾式グラスウールがシート状に形成されたシートである。乾式グラスウールは、溶融ガラスを高速回転スピナにより遠心力で飛ばすことによってガラスを繊維化する遠心法によって、形成される。あるいは、乾式グラスウールは、ガラス棒の先端部を火炎で溶融しながら吹き飛ばすことによりガラスを繊維化する火炎法によって、形成される。すなわち、第１シート２１は、綿状の素材で形成されたシートである。乾式グラスウール製のシートは、湿式グラスウール製のシートと比べ、寸法精度良く切断することが難しい。 The first sheet 21 is a sheet in which dry glass wool is formed in the form of a sheet. Dry glass wool is formed by a centrifugal method in which molten glass is made into fibers by centrifugally blowing the molten glass with a high-speed rotating spinner. Alternatively, dry glass wool is formed by a flame method in which the tip of a glass rod is melted and blown off by a flame to fibrate the glass. That is, the first sheet 21 is a sheet made of a cotton-like material. It is difficult to cut a sheet made of dry glass wool with higher dimensional accuracy than a sheet made of wet glass wool.
　第２シート２２は、湿式グラスウールがシート状に形成されたシートである。湿式グラスウールのシートは、次のように形成される。まず、遠心法又は火炎法によって、綿状のグラスウールを製造する。次に、この綿状のグラスウールをバインダー溶液中に拡散させ、抄造法によってバインダー溶液中のグラスウールをすくい取る。このすくい取られたグラスウールを乾燥させることにより、湿式グラスウールのシートが完成する。湿式グラスウールのシートは、乾式グラスウール製のシートと比べ、寸法精度良く切断することができる。一方、湿式グラスウールのシートは、乾式グラスウール製のシートと比べ、断熱性能が低くなる。 The second sheet 22 is a sheet in which wet glass wool is formed in the form of a sheet. The wet glass wool sheet is formed as follows. First, cotton-like glass wool is produced by a centrifugal method or a flame method. Next, this cotton-like glass wool is diffused into the binder solution, and the glass wool in the binder solution is scooped out by a papermaking method. By drying this scooped glass wool, a sheet of wet glass wool is completed. The wet glass wool sheet can be cut with higher dimensional accuracy than the dry glass wool sheet. On the other hand, the wet glass wool sheet has lower heat insulating performance than the dry glass wool sheet.
　なお、第２シート２２は、グラスファイバーがシート状に形成されたシートであってもよい。グラスファイバーは、連続フィラメント法で紡糸ノズルから引き出された略直線状のガラス繊維である。グラスファイバー製のシートは、湿式グラスウールのシートと同様に、乾式グラスウール製のシートと比べて寸法精度良く切断することができ、乾式グラスウール製のシートと比べて断熱性能が低くなる。 The second sheet 22 may be a sheet in which glass fibers are formed in a sheet shape. The glass fiber is a substantially linear glass fiber drawn from a spinning nozzle by a continuous filament method. Similar to the wet glass wool sheet, the glass fiber sheet can be cut with higher dimensional accuracy than the dry glass wool sheet, and the heat insulating performance is lower than that of the dry glass wool sheet.
　グラスウール体１０は、上述のように構成された積層シート２０がロール状に巻かれたものとなっている。なお、図１に示すグラスウール体１０は、第２シート２２が第１シート２１の内側となるように、積層シート２０がロール状に巻かれている。しかしながら、このような構成は、本実施の形態に係るグラスウール体１０の一例である。 The glass wool body 10 is formed by winding the laminated sheet 20 configured as described above in a roll shape. In the glass wool body 10 shown in FIG. 1, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside the first sheet 21. However, such a configuration is an example of the glass wool body 10 according to the present embodiment.
　図２は、本実施の形態に係るグラスウール体の別の一例を示す斜視図である。
　図２に示すグラスウール体１０は、第２シート２２が第１シート２１の外側となるように、積層シート２０がロール状に巻かれている。本実施の形態に係るグラスウール体１０は、このように構成されていてもよい。 FIG. 2 is a perspective view showing another example of the glass wool body according to the present embodiment.
In the glass wool body 10 shown in FIG. 2, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is on the outside of the first sheet 21. The glass wool body 10 according to the present embodiment may be configured in this way.
　続いて、本実施の形態に係るグラスウール体１０の製造方法について説明する。 Subsequently, a method for manufacturing the glass wool body 10 according to the present embodiment will be described.
　図３は、本実施の形態に係るグラスウール体の製造工程を示すフローチャートである。図４及び図５は、本実施の形態に係るグラスウール体の製造方法を説明するための図である。なお、図４及び図５は、積層シート２０をロール状に巻いている途中のグラスウール体１０を示している。 FIG. 3 is a flowchart showing a manufacturing process of a glass wool body according to the present embodiment. 4 and 5 are diagrams for explaining a method for producing a glass wool body according to the present embodiment. 4 and 5 show a glass wool body 10 in the middle of winding the laminated sheet 20 in a roll shape.
　グラスウール体１０の製造工程のステップＳ１は、積層シート２０を形成する積層シート形成工程である。積層シート形成工程では、第１シート２１に第２シート２２が重ねられ、積層シート２０が形成される。具体的には、第２シート２２が第１シート２１の内側となるように巻かれている図１に示すグラスウール体１０を製造する場合、図４に示すように、第１シート２１の上面に第２シート２２を重ねる。また、第２シート２２が第１シート２１の外側となるように巻かれている図２に示すグラスウール体１０を製造する場合、図５に示すように、第１シート２１の下面に第２シート２２を重ねる。 Step S1 of the manufacturing process of the glass wool body 10 is a laminated sheet forming step of forming the laminated sheet 20. In the laminated sheet forming step, the second sheet 22 is laminated on the first sheet 21 to form the laminated sheet 20. Specifically, when the glass wool body 10 shown in FIG. 1 in which the second sheet 22 is wound so as to be inside the first sheet 21, the glass wool body 10 shown in FIG. 1 is manufactured, as shown in FIG. 4, on the upper surface of the first sheet 21. The second sheet 22 is overlapped. Further, when the glass wool body 10 shown in FIG. 2 in which the second sheet 22 is wound so as to be outside the first sheet 21 is manufactured, as shown in FIG. 5, the second sheet is formed on the lower surface of the first sheet 21. 22 are piled up.
　グラスウール体１０の製造工程のステップＳ２は、積層シート形成工程で形成された積層シート２０を巻き取る巻き取り工程である。積層シート形成工程で形成された積層シート２０を巻き取ることにより、グラスウール体１０が完成する。例えば、第１シート２１の上面に第２シート２２が重ねられた図４に示す積層シート２０を巻き取ることにより、第２シート２２が第１シート２１の内側となるように巻かれている図１に示すグラスウール体１０を製造することができる。また、第１シート２１の下面に第２シート２２が重ねられた図５に示す積層シート２０を巻き取ることにより、第２シート２２が第１シート２１の外側となるように巻かれている図２に示すグラスウール体１０を製造することができる。 Step S2 of the manufacturing process of the glass wool body 10 is a winding step of winding the laminated sheet 20 formed in the laminated sheet forming step. The glass wool body 10 is completed by winding the laminated sheet 20 formed in the laminated sheet forming step. For example, by winding the laminated sheet 20 shown in FIG. 4 in which the second sheet 22 is superposed on the upper surface of the first sheet 21, the second sheet 22 is wound so as to be inside the first sheet 21. The glass wool body 10 shown in 1 can be produced. Further, a diagram in which the second sheet 22 is wound so as to be outside the first sheet 21 by winding the laminated sheet 20 shown in FIG. 5 in which the second sheet 22 is laminated on the lower surface of the first sheet 21. The glass wool body 10 shown in 2 can be produced.
　続いて、本実施の形態に係るグラスウール体１０を芯材３１として用いた真空断熱材３０について説明する。 Subsequently, the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment as the core material 31 will be described.
　図６は、本実施の形態に係る真空断熱材を示す断面図である。
　真空断熱材３０は、芯材３１と、この芯材３１を覆う外被材３２とを備えている。外被材３２で囲まれた空間は、すなわち芯材３１が配置されている空間は、例えば１Ｐａ～３Ｐａ程度の真空度に減圧された真空空間となっている。この外被材３２で囲まれた真空空間は、一部が開口した袋形状の外被材３２の内部を減圧した状態で、開口部をヒートシール等により熱溶着することにより、形成される。真空断熱材３０は、該真空断熱材３０の厚み方向に観察した際、換言すると図６の紙面上下方向に観察した際、例えば、全体として概略長方形の板状に形成されている。なお、本実施の形態においては、真空断熱材３０は、外被材３２で囲まれた真空空間に、水分を吸着する水分吸着剤３３も備えている。つまり、本実施の形態に係る真空断熱材３０は、芯材３１及び水分吸着剤３３が、外被材３２によって覆われている。水分吸着剤３３を備えることにより、外被材３２で囲まれた真空空間に存在する水分を水分吸着剤３３で吸着することで、真空断熱材３０の経時劣化を抑制することができる。 FIG. 6 is a cross-sectional view showing the vacuum heat insulating material according to the present embodiment.
The vacuum heat insulating material 30 includes a core material 31 and an outer cover material 32 that covers the core material 31. The space surrounded by the outer cover material 32, that is, the space in which the core material 31 is arranged, is a vacuum space decompressed to a degree of vacuum of, for example, about 1 Pa to 3 Pa. The vacuum space surrounded by the outer cover material 32 is formed by heat-welding the openings with a heat seal or the like while the inside of the bag-shaped outer cover material 32 having a part of opening is depressurized. The vacuum heat insulating material 30 is formed in a substantially rectangular plate shape as a whole, for example, when observed in the thickness direction of the vacuum heat insulating material 30, in other words, when observed in the vertical direction of the paper surface of FIG. In the present embodiment, the vacuum heat insulating material 30 also includes a water adsorbent 33 that adsorbs water in the vacuum space surrounded by the outer cover material 32. That is, in the vacuum heat insulating material 30 according to the present embodiment, the core material 31 and the moisture adsorbent 33 are covered with the outer cover material 32. By providing the moisture adsorbent 33, the moisture existing in the vacuum space surrounded by the outer cover material 32 is adsorbed by the moisture adsorbent 33, so that the deterioration of the vacuum heat insulating material 30 with time can be suppressed.
　芯材３１は、例えば四角形等の規定の形に切断された複数の積層シート２０が真空断熱材３０の厚み方向に積層されて、構成されている。すなわち、芯材３１は、規定の形に切断された複数の積層シート２０が図６の上下方向に積層されて、構成されている。 The core material 31 is formed by laminating a plurality of laminated sheets 20 cut into a specified shape such as a quadrangle in the thickness direction of the vacuum heat insulating material 30. That is, the core material 31 is formed by laminating a plurality of laminated sheets 20 cut into a predetermined shape in the vertical direction of FIG.
　外被材３２は、ガスバリア性を有するものである。外被材３２は、少なくとも、ガスバリア層及び熱溶着層を備えている。ガスバリア層としては、金属、金属酸化物及びダイヤモンドライクカーボンを蒸着したプラスチックフィルム及び金属箔等を用いることができる。プラスチックフィルム及び金属箔等に蒸着する金属酸化物は、例えば、シリカ及びアルミナ等である。なお、外被材３２のガスバリア層は、特に限定されるものでなく、ガス透過を低減する目的で従来から用いられている種々のガスバリア層を用いることができる。 The outer cover material 32 has a gas barrier property. The outer cover material 32 includes at least a gas barrier layer and a heat welding layer. As the gas barrier layer, a plastic film or metal foil on which a metal, a metal oxide, or a diamond-like carbon is vapor-deposited can be used. The metal oxide deposited on the plastic film, metal leaf, etc. is, for example, silica, alumina, or the like. The gas barrier layer of the outer cover material 32 is not particularly limited, and various gas barrier layers conventionally used for the purpose of reducing gas permeation can be used.
　外被材３２の熱溶着層は、外被材３２を袋形状に形成する際、及び袋形状の外被材３２の開口部を閉じる際に、熱溶着される部分である。図６では、熱溶着層における熱溶着された部分を熱溶着部３４として示している。熱溶着層は、外被材を構成する層の中で、最もガス透過度が大きい部分である。このため、熱溶着層の性質は、真空断熱材３０の経時的な断熱性能の変化に大きく影響する。熱溶着部３４の端面から真空断熱材３０の内部に空気等のガスが侵入することの抑制、及び、ガスバリア層として金属箔を使用した場合における熱伝導によるヒートリークを考慮すると、熱溶着層の厚さは２５μｍ～６０μｍが好ましい。熱溶着層としては、例えば、無延伸ポリプロピレンフィルム、高密度ポリエチレンフィルム、及び直鎖状低密度ポリエチレンフィルム等を用いることができる。ただし、熱溶着層は、これらの材質で形成されたものに限定されるものではなく、従来から用いられている種々の熱溶着層を用いることができる。 The heat-welded layer of the outer cover material 32 is a portion that is heat-welded when the outer cover material 32 is formed in a bag shape and when the opening of the bag-shaped outer cover material 32 is closed. In FIG. 6, the heat-welded portion of the heat-welded layer is shown as the heat-welded portion 34. The heat welding layer is a portion having the highest gas permeability among the layers constituting the outer cover material. Therefore, the properties of the heat-welded layer greatly affect the change in the heat insulating performance of the vacuum heat insulating material 30 over time. Considering the suppression of gas such as air from entering the vacuum heat insulating material 30 from the end face of the heat-welded portion 34 and the heat leakage due to heat conduction when a metal foil is used as the gas barrier layer, the heat-welded layer The thickness is preferably 25 μm to 60 μm. As the heat welding layer, for example, a non-stretched polypropylene film, a high-density polyethylene film, a linear low-density polyethylene film, or the like can be used. However, the heat welding layer is not limited to those formed of these materials, and various conventionally used heat welding layers can be used.
　なお、外被材３２は、ガスバリア層の外側に、換言するとガスバリア層を基準として芯材３１とは反対側となる面に、表面保護層をさらに備えていてもよい。表面保護層としては、例えば、ポリエチレンテレフタレートフィルム、ポリプロピレンフィルム、ナイロンフィルム等を用いることができる。ただし、熱溶着層は、これらに限定されるものではなく、従来から用いられている種々の表面保護層を用いることができる。表面保護層を設けることにより、表面保護層がない場合と比べ、真空断熱材３０が折り曲げられた際、及び真空断熱材３０の表面に突起物が接触した際等に、外被材３２が破れることをより抑制できる。 The outer cover material 32 may further be provided with a surface protective layer on the outside of the gas barrier layer, in other words, on the surface opposite to the core material 31 with respect to the gas barrier layer. As the surface protective layer, for example, a polyethylene terephthalate film, a polypropylene film, a nylon film or the like can be used. However, the heat welding layer is not limited to these, and various conventionally used surface protective layers can be used. By providing the surface protective layer, the outer cover material 32 is torn when the vacuum heat insulating material 30 is bent or when a protrusion comes into contact with the surface of the vacuum heat insulating material 30, as compared with the case where there is no surface protective layer. It can be suppressed more.
　水分吸着剤３３は、例えば、通気性の良い袋に挿入された酸化カルシウム等である。水分吸着剤３３は、酸化カルシウムに限定されず、ゼオライト等の水分吸着性を有するものであれば、特に限定されるものではない。 The water adsorbent 33 is, for example, calcium oxide inserted in a well-ventilated bag. The water adsorbent 33 is not limited to calcium oxide, and is not particularly limited as long as it has water adsorbability such as zeolite.
　続いて、本実施の形態に係る真空断熱材３０の製造方法について説明する。 Subsequently, the method for manufacturing the vacuum heat insulating material 30 according to the present embodiment will be described.
　図７は、本実施の形態に係る真空断熱材の製造工程を示すフローチャートである。図８及び図９は、本実施の形態に係る真空断熱材の製造方法を説明するための図である。なお、図８及び図９に示す円弧状の矢印は、グラスウール体１０が延ばされて行く際の、グラスウール体１０の回転方向を示している。また、図８及び図９に示す白抜き矢印は、グラスウール体１０が延ばされて行った際の、積層シート２０の進み方向を示している。 FIG. 7 is a flowchart showing the manufacturing process of the vacuum heat insulating material according to the present embodiment. 8 and 9 are diagrams for explaining the method for manufacturing the vacuum heat insulating material according to the present embodiment. The arcuate arrows shown in FIGS. 8 and 9 indicate the rotation direction of the glass wool body 10 when the glass wool body 10 is extended. Further, the white arrows shown in FIGS. 8 and 9 indicate the advancing direction of the laminated sheet 20 when the glass wool body 10 is stretched.
　真空断熱材３０は、複数のグラスウール体１０を用いて製造される。真空断熱材３０の製造工程のステップＳ１１は、積層工程である。積層工程では、図８及び図９に示すように、複数のグラスウール体１０を延ばして、複数の積層シート２０を上下方向に重ね合わせる。なお、本実施の形態では、４つのグラスウール体１０を延ばし、４枚の積層シート２０を上下方向に重ね合わせる例を示している。 The vacuum heat insulating material 30 is manufactured by using a plurality of glass wool bodies 10. Step S11 of the manufacturing process of the vacuum heat insulating material 30 is a laminating step. In the laminating step, as shown in FIGS. 8 and 9, a plurality of glass wool bodies 10 are stretched, and the plurality of laminated sheets 20 are laminated in the vertical direction. In this embodiment, an example is shown in which four glass wool bodies 10 are stretched and four laminated sheets 20 are overlapped in the vertical direction.
　真空断熱材３０の製造工程におけるステップＳ１１の後のステップＳ１２は、芯材形成工程である。芯材形成工程では、積層工程で重ね合わされた複数の積層シート２０を切断して芯材３１を形成する。具体的には、重ね合わされた複数の積層シート２０は、上下方向に切断される。このため、重ね合わされた積層シート２０の積層方向が、芯材３１の厚み方向となる。換言すると、重ね合わされた積層シート２０の積層方向が、真空断熱材３０の厚み方向となる。 Step S12 after step S11 in the manufacturing process of the vacuum heat insulating material 30 is a core material forming step. In the core material forming step, the plurality of laminated sheets 20 laminated in the laminating step are cut to form the core material 31. Specifically, the plurality of laminated sheets 20 that are overlapped are cut in the vertical direction. Therefore, the laminating direction of the laminated laminated sheets 20 is the thickness direction of the core material 31. In other words, the laminating direction of the laminated laminated sheets 20 is the thickness direction of the vacuum heat insulating material 30.
　従来の真空断熱材では、規定の形に切断された乾式グラスウール製のシートと規定の形に切断された湿式グラスウール製のシートとを積層して、芯材が形成される。乾式グラスウール製のシートを切断する場合、湿式グラスウール製のシートを切断する場合と比べ、寸法精度が悪くなる。このため、従来の真空断熱材は、規定の形に切断された乾式グラスウール製のシートと規定の形に切断された湿式グラスウール製のシートとの寸法が一致せず、寸法精度が悪くなってしまう。 In the conventional vacuum heat insulating material, a core material is formed by laminating a dry glass wool sheet cut into a specified shape and a wet glass wool sheet cut into a specified shape. When cutting a sheet made of dry glass wool, the dimensional accuracy is worse than when cutting a sheet made of wet glass wool. For this reason, in the conventional vacuum heat insulating material, the dimensions of the dry glass wool sheet cut into the specified shape and the wet glass wool sheet cut into the specified shape do not match, and the dimensional accuracy deteriorates. ..
　一方、本実施の形態では、真空断熱材３０の芯材３１を作成する場合、寸法精度良く切断することが難しい第１シート２１を、第２シート２２と一緒に切断することができる。このため、本実施の形態に係るグラスウール体１０を用いて真空断熱材３０の芯材３１を作成することにより、乾式グラスウールである第１シート２１と、湿式グラスウール又はグラスファイバーである第２シート２２との寸法を一致させやすくなる。したがって、本実施の形態に係るグラスウール体１０を用いて真空断熱材３０の芯材３１を作成することにより、乾式グラスウール製のシートと乾式グラスウール製以外のシートとが積層された芯材を用いる真空断熱材において、寸法精度を従来よりも向上させることができる。 On the other hand, in the present embodiment, when the core material 31 of the vacuum heat insulating material 30 is prepared, the first sheet 21 which is difficult to cut with high dimensional accuracy can be cut together with the second sheet 22. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, the first sheet 21 which is dry glass wool and the second sheet 22 which is wet glass wool or glass fiber It becomes easy to match the dimensions with. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, a vacuum using a core material in which a sheet made of dry glass wool and a sheet other than dry glass wool are laminated is used. In the heat insulating material, the dimensional accuracy can be improved as compared with the conventional case.
　また、従来の真空断熱材では、規定の形に切断されたシートのそれぞれを切断後に積層し、芯材を形成していた。このため、従来の真空断熱材では、各シートの積層に時間がかかり、芯材を製作する際の作業効率が悪かった。 Further, in the conventional vacuum heat insulating material, each of the sheets cut into a specified shape is laminated after being cut to form a core material. For this reason, in the conventional vacuum heat insulating material, it takes time to laminate each sheet, and the work efficiency when manufacturing the core material is poor.
　一方、本実施の形態に係るグラスウール体１０を延ばして、積層シート２０を規定の形に切断することにより、第１シート２１と第２シート２２とが既に積層された状態となっている。このため、本実施の形態に係るグラスウール体１０を用いて真空断熱材３０の芯材３１を作成することにより、芯材３１を構成するシートを積層する時間を従来よりも短縮でき、芯材３１を製作する際の作業効率を向上させることができる。特に、本実施の形態で説明している、複数のグラスウール体１０を用いる芯材３１の製造方法の場合、重ね合わされた複数の積層シート２０を切断した際、芯材３１を構成する全てのシートの積層が終了した状態となっている。このため、本実施の形態で説明している、複数のグラスウール体１０を用いる芯材３１の製造方法の場合、芯材３１を構成するシートを積層する時間をさらに短縮でき、芯材３１を製作する際の作業効率をさらに向上させることができる。 On the other hand, by extending the glass wool body 10 according to the present embodiment and cutting the laminated sheet 20 into a predetermined shape, the first sheet 21 and the second sheet 22 are already laminated. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, the time for laminating the sheets constituting the core material 31 can be shortened as compared with the conventional case, and the core material 31 can be shortened. It is possible to improve the work efficiency when manufacturing. In particular, in the case of the method for manufacturing the core material 31 using a plurality of glass wool bodies 10 described in the present embodiment, when the plurality of laminated sheets 20 are cut, all the sheets constituting the core material 31 are formed. Is in a state where the lamination of is completed. Therefore, in the case of the method for manufacturing the core material 31 using a plurality of glass wool bodies 10 described in the present embodiment, the time for laminating the sheets constituting the core material 31 can be further shortened, and the core material 31 can be manufactured. It is possible to further improve the work efficiency when doing so.
　図１０～図１２は、本実施の形態に係る真空断熱材の芯材を示す図である。図１０～図１２に示す芯材３１は、ステップＳ１２の芯材形成工程において形成された芯材３１を側方から見た図となっている。なお、図１０～図１２では、第１シート２１と第２シート２２との識別を容易とするため、第２シート２２にハッチングを施している。 10 to 12 are diagrams showing the core material of the vacuum heat insulating material according to the present embodiment. The core material 31 shown in FIGS. 10 to 12 is a side view of the core material 31 formed in the core material forming step of step S12. In FIGS. 10 to 12, the second sheet 22 is hatched in order to facilitate the distinction between the first sheet 21 and the second sheet 22.
　本実施の形態では、芯材形成工程において形成される芯材３１の上面及び下面が第２シート２２となるように、積層工程において複数の積層シート２０が上下方向に重ね合わされる。すなわち、芯材３１は、該芯材３１の厚み方向に対向する面が第２シート２２となっている。このため、本実施の形態に係る真空断熱材３０では、第２シート２２と外被材３２とが接触する構成となっている。湿式グラスウール又はグラスファイバーである第２シート２２の表面は、乾式グラスウールである第１シート２１の表面と比べ、凹凸が小さい。このため、芯材３１の厚み方向に対向する面を第２シート２２にすることにより、真空断熱材３０の表面の凹凸が目立ちにくくなり、真空断熱材３０の意匠性が向上する。 In the present embodiment, a plurality of laminated sheets 20 are laminated in the vertical direction in the laminating step so that the upper surface and the lower surface of the core material 31 formed in the core material forming step become the second sheet 22. That is, the surface of the core material 31 facing the thickness direction of the core material 31 is the second sheet 22. Therefore, in the vacuum heat insulating material 30 according to the present embodiment, the second sheet 22 and the outer cover material 32 are in contact with each other. The surface of the second sheet 22 which is wet glass wool or glass fiber has less unevenness than the surface of the first sheet 21 which is dry glass wool. Therefore, by making the surface of the core material 31 facing in the thickness direction the second sheet 22, the unevenness on the surface of the vacuum heat insulating material 30 becomes less noticeable, and the design of the vacuum heat insulating material 30 is improved.
　また、芯材３１の厚み方向に対向する面を第２シート２２にすることにより、次のような効果も得られる。乾式グラスウール、湿式グラスウール及びグラスファイバーには、未延伸ガラス粒子の塊であるショットが含まれている。ショットが外被材３２に接触していると、ショットによって外被材３２に貫通孔が形成され、該貫通孔から真空断熱材３０の内部に空気が侵入し、真空断熱材３０の断熱性能が低下する可能性がある。ここで、湿式グラスウール及びグラスファイバーに含まれるショットの量は、乾式グラスウールに含まれるショットの量と比べて少ない。このため、芯材３１の厚み方向に対向する面を湿式グラスウール又はグラスファイバーである第２シート２２にすることにより、芯材３１の厚み方向に対向する面を乾式グラスウールである第１シート２１にする場合と比べ、ショットに起因する真空断熱材３０の断熱性能の低下を抑制できる。 Further, by using the second sheet 22 as the surface of the core material 31 facing in the thickness direction, the following effects can be obtained. Dry glass wool, wet glass wool and fiberglass contain shots, which are lumps of unstretched glass particles. When the shot is in contact with the outer cover material 32, a through hole is formed in the outer cover material 32 by the shot, air enters the inside of the vacuum heat insulating material 30 from the through hole, and the heat insulating performance of the vacuum heat insulating material 30 is improved. May decrease. Here, the amount of shots contained in the wet glass wool and the glass fiber is smaller than the amount of shots contained in the dry glass wool. Therefore, the surface of the core material 31 facing the thickness direction is made of the second sheet 22 made of wet glass wool or glass fiber, so that the surface of the core material 31 facing the thickness direction is made of the first sheet 21 made of dry glass wool. It is possible to suppress the deterioration of the heat insulating performance of the vacuum heat insulating material 30 due to the shot.
　厚み方向に対向する面が第２シート２２となる芯材３１は、積層工程において複数の積層シート２０を以下のように重ね合わせることにより得られる。ここで、積層工程において複数の積層シート２０を重ね合わせる際に最も上方に配置される積層シート２０で構成されたグラスウール体１０を、第１グラスウール体１１と称することとする。また、積層工程において複数の積層シート２０を重ね合わせる際に最も下方に配置される積層シート２０で構成されたグラスウール体１０を、第２グラスウール体１２と称することとする。この場合、第１グラスウール体１１の積層シート２０は、積層工程において複数の積層シート２０を重ね合わせる際、第１シート２１の上方に第２シート２２が位置していればよい。また、第２グラスウール体１２の積層シート２０は、積層工程において複数の積層シート２０を重ね合わせる際、第１シート２１の下方に第２シート２２が位置していればよい。積層工程において、第１グラスウール体１１の積層シート２０及び第２グラスウール体１２の積層シート２０をこのような姿勢で重ね合わせることにより、厚み方向に対向する面が第２シート２２となる芯材３１が得られる。 The core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 is obtained by laminating a plurality of laminated sheets 20 as follows in the laminating step. Here, the glass wool body 10 composed of the laminated sheets 20 arranged at the uppermost position when the plurality of laminated sheets 20 are laminated in the laminating step is referred to as the first glass wool body 11. Further, the glass wool body 10 composed of the laminated sheets 20 arranged at the lowermost position when the plurality of laminated sheets 20 are laminated in the laminating step is referred to as a second glass wool body 12. In this case, the laminated sheet 20 of the first glass wool body 11 may have the second sheet 22 located above the first sheet 21 when a plurality of laminated sheets 20 are laminated in the laminating step. Further, the laminated sheet 20 of the second glass wool body 12 may have the second sheet 22 located below the first sheet 21 when a plurality of laminated sheets 20 are laminated in the laminating step. In the laminating step, the laminated sheet 20 of the first glass wool body 11 and the laminated sheet 20 of the second glass wool body 12 are laminated in such a posture, so that the surface facing in the thickness direction becomes the second sheet 22. Is obtained.
　具体的には、例えば、図８に示すように、第１グラスウール体１１及び第２グラスウール体１２は、第２シート２２が第１シート２１の内側となるように積層シート２０がロール状に巻かれているものとする。この場合、積層工程において第１グラスウール体１１及び第２グラスウール体１２を延ばす際、第１グラスウール体１１が、第２グラスウール体１２の回転方向とは逆方向に回転すればよい。より具体的には、積層工程において第１グラスウール体１１及び第２グラスウール体１２を図８のように紙面右側に延ばす際、第１グラスウール体１１は反時計回りに回転し、第２グラスウール体１２は時計回りに回転するとよい。これにより、厚み方向に対向する面が第２シート２２となる芯材３１が得られる。 Specifically, for example, as shown in FIG. 8, in the first glass wool body 11 and the second glass wool body 12, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside the first sheet 21. It is assumed that it has been done. In this case, when the first glass wool body 11 and the second glass wool body 12 are stretched in the laminating step, the first glass wool body 11 may rotate in the direction opposite to the rotation direction of the second glass wool body 12. More specifically, when the first glass wool body 11 and the second glass wool body 12 are stretched to the right side of the paper surface as shown in FIG. 8 in the laminating step, the first glass wool body 11 rotates counterclockwise and the second glass wool body 12 Should rotate clockwise. As a result, the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 can be obtained.
　また例えば、第１グラスウール体１１及び第２グラスウール体１２は、第２シート２２が第１シート２１の外側となるように積層シート２０がロール状に巻かれているものとする。この場合も、積層工程において第１グラスウール体１１及び第２グラスウール体１２を延ばす際、第１グラスウール体１１が、第２グラスウール体１２の回転方向とは逆方向に回転すればよい。より具体的には、積層工程において第１グラスウール体１１及び第２グラスウール体１２を図８のように紙面右側に延ばす際、第１グラスウール体１１は時計回りに回転し、第２グラスウール体１２は反時計回りに回転するとよい。これにより、厚み方向に対向する面が第２シート２２となる芯材３１が得られる。 Further, for example, in the first glass wool body 11 and the second glass wool body 12, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is on the outside of the first sheet 21. In this case as well, when the first glass wool body 11 and the second glass wool body 12 are stretched in the laminating step, the first glass wool body 11 may rotate in the direction opposite to the rotation direction of the second glass wool body 12. More specifically, when the first glass wool body 11 and the second glass wool body 12 are stretched to the right side of the paper surface as shown in FIG. 8 in the laminating step, the first glass wool body 11 rotates clockwise and the second glass wool body 12 Rotate counterclockwise. As a result, the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 can be obtained.
　また例えば、図９に示すように、第１グラスウール体１１は、第２シート２２が第１シート２１の内側となるように積層シート２０がロール状に巻かれているものとする。そして、第２グラスウール体１２は、第２シート２２が第１シート２１の外側となるように積層シート２０がロール状に巻かれているものとする。この場合、積層工程において第１グラスウール体１１及び第２グラスウール体１２を延ばす際、第１グラスウール体１１が、第２グラスウール体１２の回転方向と同方向に回転すればよい。より具体的には、積層工程において第１グラスウール体１１及び第２グラスウール体１２を図９のように紙面右側に延ばす際、第１グラスウール体１１及び第２グラスウール体１２は、反時計回りに回転するとよい。これにより、厚み方向に対向する面が第２シート２２となる芯材３１が得られる。 Further, for example, as shown in FIG. 9, in the first glass wool body 11, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside the first sheet 21. Then, in the second glass wool body 12, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is on the outside of the first sheet 21. In this case, when the first glass wool body 11 and the second glass wool body 12 are stretched in the laminating step, the first glass wool body 11 may rotate in the same direction as the rotation direction of the second glass wool body 12. More specifically, when the first glass wool body 11 and the second glass wool body 12 are stretched to the right side of the paper surface as shown in FIG. 9 in the laminating step, the first glass wool body 11 and the second glass wool body 12 rotate counterclockwise. It is good to do it. As a result, the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 can be obtained.
　また例えば、第１グラスウール体１１は、第２シート２２が第１シート２１の外側となるように積層シート２０がロール状に巻かれているものとする。そして、第２グラスウール体１２は、第２シート２２が第１シート２１の内側となるように積層シート２０がロール状に巻かれているものとする。この場合も、積層工程において第１グラスウール体１１及び第２グラスウール体１２を延ばす際、第１グラスウール体１１が、第２グラスウール体１２の回転方向と同方向に回転すればよい。より具体的には、積層工程において第１グラスウール体１１及び第２グラスウール体１２を図９のように紙面右側に延ばす際、第１グラスウール体１１及び第２グラスウール体１２は、時計回りに回転するとよい。これにより、厚み方向に対向する面が第２シート２２となる芯材３１が得られる。 Further, for example, in the first glass wool body 11, it is assumed that the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is on the outside of the first sheet 21. Then, in the second glass wool body 12, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside the first sheet 21. In this case as well, when the first glass wool body 11 and the second glass wool body 12 are stretched in the laminating step, the first glass wool body 11 may rotate in the same direction as the rotation direction of the second glass wool body 12. More specifically, when the first glass wool body 11 and the second glass wool body 12 are stretched to the right side of the paper surface as shown in FIG. 9 in the laminating step, the first glass wool body 11 and the second glass wool body 12 are rotated clockwise. Good. As a result, the core material 31 whose surfaces facing each other in the thickness direction are the second sheet 22 can be obtained.
　なお、第１グラスウール体１１の積層シート２０と第２グラスウール体１２の積層シート２０との間に挟まれる積層シート２０で構成されたグラスウール体１０は、第２シート２２が第１シート２１の外側となるように積層シート２０がロール状に巻かれているものであってもよいし、第２シート２２が第１シート２１の内側となるように積層シート２０がロール状に巻かれているものであってもよい。また、第１グラスウール体１１の積層シート２０と第２グラスウール体１２の積層シート２０との間に挟まれる積層シート２０で構成されたグラスウール体１０は、積層工程において延ばされる際、回転方向は特に限定されない。このため、図１０～図１２に示すように、第１グラスウール体１１の積層シート２０と第２グラスウール体１２の積層シート２０との間に挟まれる積層シート２０は、第１シート２１の下方に第２シート２２が位置している場合もあれば、第１シート２１の上方に第２シート２２が位置している場合もある。 In the glass wool body 10 composed of the laminated sheet 20 sandwiched between the laminated sheet 20 of the first glass wool body 11 and the laminated sheet 20 of the second glass wool body 12, the second sheet 22 is outside the first sheet 21. The laminated sheet 20 may be wound in a roll shape so as to be, or the laminated sheet 20 may be wound in a roll shape so that the second sheet 22 is inside the first sheet 21. It may be. Further, when the glass wool body 10 composed of the laminated sheet 20 sandwiched between the laminated sheet 20 of the first glass wool body 11 and the laminated sheet 20 of the second glass wool body 12 is stretched in the laminating step, the rotation direction is particularly high. Not limited. Therefore, as shown in FIGS. 10 to 12, the laminated sheet 20 sandwiched between the laminated sheet 20 of the first glass wool body 11 and the laminated sheet 20 of the second glass wool body 12 is located below the first sheet 21. The second sheet 22 may be located, or the second sheet 22 may be located above the first sheet 21.
　真空断熱材３０の製造工程におけるステップＳ１２の後のステップＳ２０は、芯材３１を外被材３２で覆う被覆工程である。本実施の形態では、被覆工程は、ステップＳ２１の芯材挿入工程、ステップＳ２２の乾燥工程、ステップＳ２３の水分吸着剤挿入工程、ステップＳ２４の減圧工程、及びステップＳ２５の密封工程を備えている。 Step S20 after step S12 in the manufacturing process of the vacuum heat insulating material 30 is a coating step of covering the core material 31 with the outer cover material 32. In the present embodiment, the coating step includes a core material insertion step of step S21, a drying step of step S22, a moisture adsorbent insertion step of step S23, a decompression step of step S24, and a sealing step of step S25.
　ステップＳ２１の芯材挿入工程では、袋形状に形成された外被材３２の内部に、芯材３１を挿入する。なお、外被材３２の袋形状は、四方シール袋の形状、ガゼット袋の形状、三方シール袋の形状、ピロー袋の形状、及びセンターテープシール袋の形状等、特に限定されない。 In the core material insertion step of step S21, the core material 31 is inserted into the outer cover material 32 formed in the shape of a bag. The bag shape of the outer cover material 32 is not particularly limited, such as the shape of the four-sided seal bag, the shape of the gusset bag, the shape of the three-way seal bag, the shape of the pillow bag, and the shape of the center tape seal bag.
　芯材挿入工程の後、ステップＳ２２の乾燥工程では、芯材３１及び外被材３２を乾燥させ、芯材３１及び外被材３２から水分を除去する。本実施の形態では、袋形状に形成された外被材３２の内部に芯材３１が挿入された状態で、芯材３１及び外被材３２を１１０℃で２時間程度加熱処理する。なお、芯材３１及び外被材３２を乾燥させる条件は、芯材３１及び外被材３２から水分を除去できれば、特に限定されない。 After the core material insertion step, in the drying step of step S22, the core material 31 and the outer cover material 32 are dried, and moisture is removed from the core material 31 and the outer cover material 32. In the present embodiment, the core material 31 and the outer cover material 32 are heat-treated at 110 ° C. for about 2 hours with the core material 31 inserted inside the outer cover material 32 formed in the shape of a bag. The conditions for drying the core material 31 and the outer cover material 32 are not particularly limited as long as moisture can be removed from the core material 31 and the outer cover material 32.
　乾燥工程の後、ステップＳ２３の水分吸着剤挿入工程では、袋形状に形成された外被材３２の内部に、水分吸着剤３３を挿入する。水分吸着剤挿入工程の後、ステップＳ２４の減圧工程では、袋形状に形成された外被材３２の内部を、１Ｐａ～３Ｐａ程度の真空度に減圧する。減圧工程の後、ステップＳ２５の密封工程では、袋形状に形成された外被材３２の開口部をヒートシール等により熱溶着し、芯材３１及び水分吸着剤３３を外被材３２で密封する。これにより、真空断熱材３０が完成する。なお、水分吸着剤挿入工程の位置は、上述の位置に限定されない。水分吸着剤挿入工程の位置は、密封工程の前であればよい。 After the drying step, in the moisture adsorbent insertion step of step S23, the moisture adsorbent 33 is inserted into the outer cover material 32 formed in the shape of a bag. After the water adsorbent insertion step, in the decompression step of step S24, the inside of the outer cover material 32 formed in the bag shape is depressurized to a degree of vacuum of about 1 Pa to 3 Pa. After the depressurizing step, in the sealing step of step S25, the opening of the outer cover material 32 formed in the shape of a bag is heat-welded by heat sealing or the like, and the core material 31 and the moisture adsorbent 33 are sealed with the outer cover material 32. .. As a result, the vacuum heat insulating material 30 is completed. The position of the water adsorbent insertion step is not limited to the above-mentioned position. The position of the moisture adsorbent insertion step may be before the sealing step.
　以上、本実施の形態に係るグラスウール体１０は、第１シート２１及び該第１シート２１に重ねられた第２シート２２を有する積層シート２０を備えている。第１シート２１は、乾式グラスウールがシート状に形成されたシートである。第２シート２２は、湿式グラスウール又はグラスファイバーがシート状に形成されたシートである。そして、グラスウール体１０は、第２シート２２が第１シート２１の内側又は外側となるように積層シート２０がロール状に巻かれている。 As described above, the glass wool body 10 according to the present embodiment includes a first sheet 21 and a laminated sheet 20 having a second sheet 22 stacked on the first sheet 21. The first sheet 21 is a sheet in which dry glass wool is formed in the form of a sheet. The second sheet 22 is a sheet in which wet glass wool or glass fiber is formed in a sheet shape. Then, in the glass wool body 10, the laminated sheet 20 is wound in a roll shape so that the second sheet 22 is inside or outside the first sheet 21.
　本実施の形態に係るグラスウール体１０を用いて真空断熱材３０の芯材３１を作成する場合、寸法精度良く切断することが難しい第１シート２１を、第２シート２２と一緒に切断することができる。このため、本実施の形態に係るグラスウール体１０を用いて真空断熱材３０の芯材３１を作成することにより、乾式グラスウールである第１シート２１と、湿式グラスウール又はグラスファイバーである第２シート２２との寸法を一致させやすくなる。したがって、本実施の形態に係るグラスウール体１０を用いて真空断熱材３０の芯材３１を作成することにより、乾式グラスウール製のシートと乾式グラスウール製以外のシートとが積層された芯材を用いる真空断熱材において、寸法精度を従来よりも向上させることができる。 When the core material 31 of the vacuum heat insulating material 30 is produced using the glass wool body 10 according to the present embodiment, the first sheet 21 which is difficult to cut with high dimensional accuracy can be cut together with the second sheet 22. it can. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, the first sheet 21 which is dry glass wool and the second sheet 22 which is wet glass wool or glass fiber It becomes easy to match the dimensions with. Therefore, by creating the core material 31 of the vacuum heat insulating material 30 using the glass wool body 10 according to the present embodiment, a vacuum using a core material in which a sheet made of dry glass wool and a sheet other than dry glass wool are laminated is used. In the heat insulating material, the dimensional accuracy can be improved as compared with the conventional case.
　１０　グラスウール体、１１　第１グラスウール体、１２　第２グラスウール体、２０　積層シート、２１　第１シート、２２　第２シート、３０　真空断熱材、３１　芯材、３２　外被材、３３　水分吸着剤、３４　熱溶着部。 10 glass wool body, 11 1st glass wool body, 12 2nd glass wool body, 20 laminated sheet, 21 1st sheet, 22 2nd sheet, 30 vacuum heat insulating material, 31 core material, 32 outer cover material, 33 moisture adsorbent, 34 Heat welded part.

Claims (7)

  1. 　第１シート及び該第１シートに重ねられた第２シートを有する積層シートを備え、
    　前記第１シートは、乾式グラスウールがシート状に形成されたシートであり、
    　前記第２シートは、湿式グラスウール又はグラスファイバーがシート状に形成されたシートであり、
    　前記第２シートが前記第１シートの内側又は外側となるように前記積層シートがロール状に巻かれているグラスウール体。     A laminated sheet having a first sheet and a second sheet stacked on the first sheet is provided.
    The first sheet is a sheet in which dry glass wool is formed in the form of a sheet.
    The second sheet is a sheet in which wet glass wool or glass fiber is formed in the form of a sheet.
    A glass wool body in which the laminated sheet is wound in a roll shape so that the second sheet is inside or outside the first sheet.
  2. 　請求項１に記載のグラスウール体を複数用いた真空断熱材の製造方法であって、
    　複数の前記グラスウール体を延ばして、複数の前記積層シートを上下方向に重ね合わせる積層工程と、
    　前記積層工程で重ね合わされた複数の前記積層シートを切断して芯材を形成する芯材形成工程と、
    　前記芯材を外被材で覆う被覆工程と、
    　を備えた真空断熱材の製造方法。     The method for producing a vacuum heat insulating material using a plurality of glass wool bodies according to claim 1.
    A laminating step in which a plurality of the glass wool bodies are stretched and the plurality of laminated sheets are laminated in the vertical direction.
    A core material forming step of cutting a plurality of the laminated sheets laminated in the laminating step to form a core material, and a core material forming step.
    A coating process of covering the core material with an outer cover material and
    A method for manufacturing a vacuum heat insulating material.
  3. 　前記積層工程において複数の前記積層シートを重ね合わせる際に最も上方に配置される前記積層シートで構成された前記グラスウール体を第１グラスウール体とし、
    　前記積層工程において複数の前記積層シートを重ね合わせる際に最も下方に配置される前記積層シートで構成された前記グラスウール体を第２グラスウール体とした場合、
    　前記積層工程において複数の前記積層シートを重ね合わせる際、
    　前記第１グラスウール体の前記積層シートは、前記第１シートの上方に前記第２シートが位置しており、
    　前記第２グラスウール体の前記積層シートは、前記第１シートの下方に前記第２シートが位置している請求項２に記載の真空断熱材の製造方法。     The glass wool body composed of the laminated sheets arranged at the uppermost position when the plurality of laminated sheets are laminated in the laminating step is designated as a first glass wool body.
    When the glass wool body composed of the laminated sheets arranged at the lowermost position when the plurality of laminated sheets are laminated in the laminating step is used as the second glass wool body.
    When stacking a plurality of the laminated sheets in the laminating step,
    In the laminated sheet of the first glass wool body, the second sheet is located above the first sheet.
    The method for producing a vacuum heat insulating material according to claim 2, wherein the laminated sheet of the second glass wool body has the second sheet located below the first sheet.
  4. 　前記第１グラスウール体及び前記第２グラスウール体は、前記第２シートが前記第１シートの内側となるように前記積層シートがロール状に巻かれており、
    　前記積層工程において前記第１グラスウール体及び前記第２グラスウール体を延ばす際、前記第１グラスウール体は、前記第２グラスウール体の回転方向とは逆方向に回転する
    　請求項３に記載の真空断熱材の製造方法。     In the first glass wool body and the second glass wool body, the laminated sheet is wound in a roll shape so that the second sheet is inside the first sheet.
    The vacuum heat insulating material according to claim 3, wherein when the first glass wool body and the second glass wool body are stretched in the laminating step, the first glass wool body rotates in a direction opposite to the rotation direction of the second glass wool body. Manufacturing method.
  5. 　前記第１グラスウール体及び前記第２グラスウール体は、前記第２シートが前記第１シートの外側となるように前記積層シートがロール状に巻かれており、
    　前記積層工程において前記第１グラスウール体及び前記第２グラスウール体を延ばす際、前記第１グラスウール体は、前記第２グラスウール体の回転方向とは逆方向に回転する
    　請求項３に記載の真空断熱材の製造方法。     In the first glass wool body and the second glass wool body, the laminated sheet is wound in a roll shape so that the second sheet is on the outside of the first sheet.
    The vacuum heat insulating material according to claim 3, wherein when the first glass wool body and the second glass wool body are stretched in the laminating step, the first glass wool body rotates in a direction opposite to the rotation direction of the second glass wool body. Manufacturing method.
  6. 　前記第１グラスウール体は、前記第２シートが前記第１シートの内側となるように前記積層シートがロール状に巻かれており、
    　前記第２グラスウール体は、前記第２シートが前記第１シートの外側となるように前記積層シートがロール状に巻かれており、
    　前記積層工程において前記第１グラスウール体及び前記第２グラスウール体を延ばす際、前記第１グラスウール体は、前記第２グラスウール体の回転方向と同方向に回転する
    　請求項３に記載の真空断熱材の製造方法。     In the first glass wool body, the laminated sheet is wound in a roll shape so that the second sheet is inside the first sheet.
    In the second glass wool body, the laminated sheet is wound in a roll shape so that the second sheet is on the outside of the first sheet.
    The vacuum heat insulating material according to claim 3, wherein when the first glass wool body and the second glass wool body are stretched in the laminating step, the first glass wool body rotates in the same direction as the rotation direction of the second glass wool body. Production method.
  7. 　前記第１グラスウール体は、前記第２シートが前記第１シートの外側となるように前記積層シートがロール状に巻かれており、
    　前記第２グラスウール体は、前記第２シートが前記第１シートの内側となるように前記積層シートがロール状に巻かれており、
    　前記積層工程において前記第１グラスウール体及び前記第２グラスウール体を延ばす際、前記第１グラスウール体は、前記第２グラスウール体の回転方向と同方向に回転する
    　請求項３に記載の真空断熱材の製造方法。     In the first glass wool body, the laminated sheet is wound in a roll shape so that the second sheet is on the outside of the first sheet.
    In the second glass wool body, the laminated sheet is wound in a roll shape so that the second sheet is inside the first sheet.
    The vacuum heat insulating material according to claim 3, wherein when the first glass wool body and the second glass wool body are stretched in the laminating step, the first glass wool body rotates in the same direction as the rotation direction of the second glass wool body. Production method.
PCT/JP2019/039477 2019-10-07 2019-10-07 Glass wool body and production method for vacuum insulation material WO2021070221A1 (en)

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JP2012159144A (en) * 2011-02-01 2012-08-23 Toshiba Home Technology Corp Vacuum thermal insulating material and holder using the same
WO2015136817A1 (en) * 2014-03-10 2015-09-17 日東紡績株式会社 Glass chopped strand mat, glass chopped strand mat roll, method for manufacturing glass chopped strand mat and automotive molded ceiling material
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