JP2022154536A - Manufacturing method for vacuum heat insulating material, and vacuum heat insulating material - Google Patents

Abstract

To provide a manufacturing method of a vacuum heat insulating material capable of using a fiber material with a small dimension, which cannot be used as a core material by itself, as a material, suppressing the waste of the fiber material that is a material of the core material, and reducing load on environment.SOLUTION: A manufacturing method comprises: forming a core material 2 and an outer packaging material housing the core material 2 and having a gas barrier property; decompressing the inside of the outer packaging material to create a vacuum; sealing an opening part of the outer packaging material; and integrating a plurality of fiber materials 6, 8 and binding one fiber material 6 and another fiber material 8 among the plurality of fiber materials 6, 8 to each other, to manufacture the core material 2.SELECTED DRAWING: Figure 5

Description

The present disclosure relates to a method for manufacturing a vacuum insulation material and a vacuum insulation material.

2. Description of the Related Art Vacuum heat insulating materials are used in refrigerators, freezers, hot water heaters, and other cold-heating equipment in order to reduce power consumption. The vacuum heat insulating material includes a core material and an outer wrapping material formed of a film, and the core material is enclosed inside the outer wrapping material. The interior of the outer wrapping material is decompressed, that is, evacuated, and all edges of the outer wrapping material are sealed to prevent air from entering the interior.

The core material used for the vacuum insulation material is required to be easily inserted into the outer wrapping material, maintain its shape after being inserted into the outer wrapping material, and be easy to handle. From these points of view, a pre-compressed fibrous material is used as the core material. Compressed fibrous materials are commercially available in the form of boards and rolls, and these fibrous materials are cut into appropriate sizes according to the size of the vacuum insulation material and other requirements.

Here, if the remnants remaining after cutting the fiber materials are less than a size that is useful as a material for vacuum insulation materials and other products, are they melted and returned to raw materials for recycling? , is discarded. In particular, when discarding offcuts, there is a problem that the load on the environment is large.

As a method of using a small-sized fiber material such as the above-mentioned offcuts as a material for a core material of a heat insulating material, a method of wrapping a core material cut into a plurality of pieces with an inner covering material is known. For example, Patent Literature 1 discloses a vacuum heat insulating material having a laminate in which a plurality of core materials are stacked. This laminate is composed of a first core material for forming the laminate into a required size and a second core material for retaining the shape of the laminate. The first core material is covered with a first inner covering material, and the second core material is covered with a second inner covering material.

However, the inner covering material is made of a material having a higher thermal conductivity than the material of the core material. Therefore, there is a problem that the heat conduction of the inner covering material lowers the heat insulation performance compared to the vacuum heat insulating material that does not use the inner covering material.

JP 2007-263334 A

The present disclosure has been made to solve these problems. That is, the present disclosure can use as a material a fiber material with a small size that cannot be used as a core material by itself, suppressing waste of the fiber material that is the material of the core material, and reducing the burden on the environment. An object of the present invention is to provide a method for manufacturing a vacuum heat insulating material.

A method for manufacturing a vacuum insulation material according to the present disclosure includes the steps of forming a core material and an outer wrapping material having gas barrier properties that accommodates the core material, depressurizing the inside of the outer wrapping material to create a vacuum, and opening the outer wrapping material. The steps of sealing the part and consolidating a plurality of fibrous materials and binding one of the plurality of fibrous materials and the other fibrous materials to each other to produce a core material.

According to the present disclosure, at least one of the plurality of fibrous materials constrains and unites the other fibrous materials to form a core. Therefore, it is possible to use a small-sized fibrous material as a material, which cannot be used as a core material by itself. As a result, waste of the fibrous material, which is the material of the core material, can be suppressed, and the load on the environment can be reduced.

1 is a perspective view of a vacuum heat insulating material according to Embodiment 1 of the present disclosure; FIG. II-II line sectional view of the vacuum heat insulating material shown in FIG. Sectional view of the film used for forming the outer wrapping material in Embodiment 1 of the present disclosure Flowchart showing manufacturing process of vacuum heat insulating material according to Embodiment 1 of the present disclosure 1A and 1B are a top view and a front view of a core material used for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present disclosure; FIG. 1A and 1B are a top view and a front view of a fiber material used for manufacturing a core material in a vacuum heat insulating material according to Embodiment 1 of the present disclosure. FIG. Schematic diagram for explaining the compression/sealing process in the method for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present disclosure Schematic diagram for explaining the compression/sealing process in the method for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present disclosure Schematic diagram for explaining the compression/sealing process in the method for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present disclosure Schematic diagram for explaining a drying step in a method for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present disclosure Schematic diagram for explaining a drying step in a method for manufacturing a vacuum heat insulating material according to Embodiment 1 of the present disclosure Schematic diagram for explaining a vacuum packaging step in a method for manufacturing a vacuum insulation material according to Embodiment 1 of the present disclosure FIG. 10 is a top view and a front view of a fibrous material used for manufacturing a core material in manufacturing a vacuum heat insulating material according to Embodiment 2 of the present disclosure; FIG. 10 is a top view and a front view of a fibrous material used for manufacturing a core material in manufacturing a vacuum heat insulating material according to Embodiment 2 of the present disclosure; Schematic diagram for explaining a core material used for manufacturing a vacuum heat insulating material according to Embodiment 2 of the present disclosure Flowchart showing manufacturing process of vacuum heat insulating material according to Embodiment 3 of the present disclosure Schematic diagram for explaining a core material used for manufacturing a vacuum heat insulating material according to Embodiment 3 of the present disclosure Schematic diagram for explaining a core material used for manufacturing a vacuum heat insulating material according to Embodiment 4 of the present disclosure Schematic diagram for explaining a core material used for manufacturing a vacuum heat insulating material according to Embodiment 4 of the present disclosure

[Embodiment 1]
The vacuum heat insulating material 1 manufactured according to Embodiment 1 of the present disclosure has the appearance shown in FIG. 1, and as shown in FIG. It is composed of an adsorbent 4 placed inside 3 . The inside of the outer wrapping material 3 is depressurized to several Pa and sealed.

1. Outer Wrapping Material The outer wrapping material 3 is formed of two films 5 having gas barrier properties. As the film 5, for example, a film having a multilayer structure as shown in FIG. 3 can be used. The film 5 is formed by laminating at least a gas barrier layer 52 and a thermal adhesion layer 53 on a resin film 51 in this order.

The resin film 51 is a base material that supports the gas barrier layer 52 and the thermal adhesion layer 53 and also serves as a layer that protects the surface of the vacuum heat insulating material 1 . The resin film 51 is formed from a thermoplastic resin film. Polyethylene and polyester are preferable as the material of the thermoplastic resin film.

The gas barrier layer 52 is a layer that prevents air from penetrating into the interior of the vacuum heat insulating material 1 . The gas barrier layer 52 is formed of a metal foil or a metal-deposited resin film and laminated on the resin film 51 . Aluminum is preferred as the material for the metal foil or the metal used for metal vapor deposition.

The thermal adhesion layer 53 is a layer that melts under pressure and heat and exhibits adhesiveness. The thermal adhesion layer 53 is made of, for example, polyolefin resin or hot melt adhesive.

2. Core Material As the fibrous material used for the core material 2, an aggregate of inorganic fibers is preferable, and glass wool is particularly preferable. In the present disclosure, as the fibrous material, glass wool offcuts remaining after cutting a commercially available glass wool roll product are mainly used.

The core material 2 is formed by engaging and integrating a plurality of fibrous materials. As a result, separation of the fibrous material inside the vacuum heat insulating material is suppressed, and the shape of the core material 2 is maintained. As a result, deterioration of the heat insulation function is suppressed.

In the vacuum heat insulating material 1, since the inside of the outer wrapping material 3 is evacuated, the core material 2 is compressed by the atmospheric pressure. In consideration of this point, the thickness of the core material 2 before being inserted into the outer wrapping material 3 is set to several times to several ten times the desired thickness of the vacuum heat insulating material. For example, when manufacturing the vacuum heat insulating material 1 with a thickness of 10 mm to 20 mm, the thickness of the core material 2 is several 100 mm. In this embodiment, the core material 2 is directly covered with the outer wrapping material 3 without an inner wrapping material. Further, the core material 2 does not contain a binder for binding the fibrous material.

The adsorbent 4 can be prepared, for example, by inserting calcium oxide powder into a well-ventilated bag. Calcium oxide is mainly used for the purpose of adsorbing moisture, but other substances having adsorption properties for gases can also be used as necessary.

[Production method]
The manufacturing method of the vacuum heat insulating material 1 according to the first embodiment includes, as shown in FIG. 4, a core manufacturing process, a compression/sealing process, a drying process, and a vacuum packaging process.

1. Core Material Manufacturing Process In manufacturing the core material 2 in manufacturing the vacuum heat insulating material of the present disclosure, a plurality of fibrous materials are engaged to constrain and integrate the fibrous materials. By doing so, the shape of the core material 2 is maintained.

In this embodiment, as shown in FIG. 5, the fibrous material 8 is accommodated inside the slits 7 formed in the fibrous material 6 so that the fibrous material 6 and the fibrous material 8 are engaged with each other. unify. In this embodiment, offcuts of commercially available glass wool are used as the fibrous materials 6 and 8 . Glass wool offcuts are glass wool that is small in size and has no other uses. What remains is mentioned.

As the fibrous material 6, rectangular parallelepiped glass wool is used as shown in FIG. As shown in FIG. 6, when the planar dimensions of the fibrous material 6 are less than the expected dimensions of the core material 2, as shown in FIG. Moreover, as shown in FIG. 6, a slit 7 is formed in the surface of each fiber material 6 whose thickness forms one side. Here, the thickness refers to the shortest dimension of the fiber material 6 . The surface having the thickness forming one side indicates the front surface in FIG. 6 . The slit 7 is formed parallel to the upper surface of the fiber material 6 and penetrates to the opposite surface. Moreover, as shown in FIG. 5, when arranging a plurality of fibrous materials 6, slits 7 are formed in the surfaces where the fibrous materials 6 come into contact with each other.

Next, as shown in FIG. 5, a plurality of fibrous materials 8 are accommodated in slits 7 formed in the fibrous material 6 described above. As the fibrous material 8, strip-shaped or quadrangular prism-shaped glass wool is used. As shown in FIG. 5, when a plurality of fibrous materials 6 are arranged, the fibrous material 8 straddles the arranged fibrous materials 6, and both ends of the fibrous material 6 are flush with the end surfaces of the fibrous materials 6. It has a stowed length. Further, the fiber material 8 is formed to have a thickness in which the sum of the thickness of the fiber material 5 and the length of one side of the vertical cross section of the fiber material 8 coincides with the planned dimension in the thickness direction of the core material 2 . In this manner, a plurality of fibrous materials 6 are connected by a plurality of fibrous materials 8 . On the other hand, the plurality of fibrous materials 8 are accommodated and restrained in the slits 7 of the plurality of fibrous materials 6 . As a result, the fibrous material 6 and the fibrous material 8 are constrained to each other and integrated.

2. Compression/Sealing Process As shown in FIG. 7, the core material 2 is placed in a state of being sandwiched between two films 5 on a pressing machine 11 around which a welding sealing machine 10 is placed. Thereafter, as shown in FIG. 8, the core material 2 is compressed together with the film 5 by the pressing machine 11 . At this time, the thickness of the core material 2 is compressed until it reaches a desired thickness equivalent to that of the vacuum heat insulating material 1 .

After the compression is completed, four sides of the peripheral portion of the film 5 are crimped by heat and pressure by a welding sealer 10 as shown in FIG. Next, the compression by the press machine 11 is released. By doing so, the outer wrapping material 3 containing the core material 2 is formed. At this time, the restoring force of the core material 2 and the compressive force due to the differential pressure between the inside and outside of the film 5 are balanced, so that the thickness of the core material 2 is maintained equal to or three times the desired thickness of the vacuum heat insulating material 1. . However, considering that it will be compressed in the vacuum packaging process, which will be described later, the thickness of the vacuum heat insulating material may be larger than desired.

3. Drying Step Next, the outer wrapping material 3 containing the core material 2 is placed on a drying table 20 shown in FIG. 10 and put into a drying furnace. At this time, the drying table 20 is provided with regulating plates 21a to 21d in order from the top, and the outer wrapping material 3 containing the core material 2 is inserted between the regulating plates 21a to 21d. The distance between the regulating plates 21a-21d is set to be equal to or three times the desired thickness of the vacuum heat insulating material 1 to limit the restoring force of the core material 2 so that when the core material 2 is released from the sealed state, the original thickness is maintained. prevent a return to After the outer wrapping material 3 containing the core material 2 is stored on the drying table, one of the four welded peripheral edges of the outer wrapping material 3 is opened to start drying.

The temperature inside the drying oven is 10° C. to 20° C. lower than the lowest melting point of the materials of the layers forming the film 5 forming the outer wrapping material 3 . After the outer wrapping material 3 containing the core material 2 is put in, it is left in the furnace for several tens of minutes to several hours to dry the core material 2 and the film 5 . Moisture and other volatile components adsorbed on the surfaces of the core material 2 and the film 5 are desorbed by this drying process. By doing so, the amount of gas generated inside the vacuum heat insulating material 1 is reduced after the vacuum packaging process. Therefore, the heat transfer due to the movement of gas molecules is suppressed, and the heat insulating property of the vacuum heat insulating material 1 is improved.

After the drying process is completed, the sealing jig 12 is removed from the unsealed outer packaging material as shown in FIG. attached to one side. After that, the outer wrapping material 3 containing the core material 2 is taken out from the drying table 20 .

4. Vacuum Packaging Step After the drying step described above is completed, the outer packaging material 3 containing the core material 2 is moved to the vacuum container 30 . As shown in FIG. 12, the outer packaging material 3 containing the core material 2 is inserted between two regulating plates 31 installed inside the vacuum vessel 30 . The dimension of the space between the two regulating plates 31 is equal to or three times the desired thickness of the vacuum heat insulating material 1 . Next, the sealing jig 12 is removed from the outer wrapping material 3 and the adsorbent 4 is inserted into the outer wrapping material 3 .

Next, the vacuum container 30 is sealed and the inside is evacuated to a vacuum. At this time, the air inside the outer packaging material 3 is also exhausted from the unsealing portion, and the inside of the outer packaging material 3 is also evacuated. When the inside of the vacuum vessel is sufficiently evacuated and the pressure reaches a vacuum state of several Pa, the unsealed portion is heat-sealed by a welding sealer 32 and sealed. After that, the evacuation of the vacuum container 30 is stopped and the inside of the container is opened to the atmosphere, whereby the core material 2 is compressed by the atmospheric pressure through the film 5, and the thickness is several tenths of that of the fiber material of the raw material. It will be By doing so, the inside of the outer packaging material 3 is evacuated. The vacuum heat insulating material 1 is obtained by the above steps. In the present disclosure, the vacuum does not have to be strictly 0 Pa, but preferably has a high degree of vacuum, preferably 6 Pa or less, preferably 3 Pa or less.

In this embodiment, the core material 2 is formed by inserting a plurality of different fiber materials 8 into two fiber materials 6 having slits 7 and integrating them. Therefore, there is no need for an inner covering material for collecting scraps, and there is no need to arrange members other than the core material 2 in the outer wrapping material 3, so that the performance of the vacuum heat insulating material is not degraded. In addition, for the preparation of members for other products, it is possible to effectively utilize offcuts that remain after cutting out rolls of raw material fibrous materials. Therefore, according to the present embodiment, the waste of fibrous material can be suppressed, and the load on the environment can be reduced.

In this embodiment, an example of using two fibrous materials 6 forming the slits 7 is shown, but similar effects can be obtained by using three or more fibrous materials 6 .

Further, in the present embodiment, after the core material 2 is sandwiched between the two films 5, the bag-shaped outer wrapping material 3 is formed. should be able to form For example, the core material 2 may be inserted through the opening of the outer wrapping material 3 after forming the bag-shaped outer wrapping material 3 . The same applies to the following embodiments.

[Embodiment 2]
Embodiment 2 of the present disclosure differs from Embodiment 1 in the following points, but is basically the same as Embodiment 1 in other respects. In this embodiment, first, a rectangular parallelepiped fiber material 16 shown in FIG. 13 and a rectangular parallelepiped fiber material 18 shown in FIG. 14 are prepared. These are made from scraps of glass wool, as in the first embodiment.

The planar shape and size of the fiber materials 16 and 18 when the two fiber materials 16 are arranged vertically in the drawing are substantially the same as the planar shape and size when the two fiber materials 18 are arranged horizontally in the drawing. is formed as

First, as shown in FIG. 13, a slit 17 parallel to the long side is formed from the midpoint of the short side of the rectangle forming the upper surface of the fiber material 16 . The slit 17 penetrates from the upper surface to the opposite surface. A slit 17 is also formed from the other short side in the same manner. The length of each slit 17 is approximately 1/4 the length of the long side of the fabric 16 . Another fibrous material 16 is produced by a similar process.

Next, slits 17a and 17b are formed in the fibrous material 18. As shown in FIG. As shown in FIG. 14, two slits 17a and 17b parallel to the short side are formed from the long side of the rectangle forming the upper surface of the fiber material 18. As shown in FIG. The slits 17a and 17b penetrate from the upper surface to the opposite surface. Also, the distances between the short sides and the nearest short sides of the slits 17a and 17b and between the slits 17a and 17b are all equal. The length of each slit 17a, 17b is approximately 1/2 of the short side. Another fibrous material 18 is produced by a similar process.

Subsequently, the fibrous material 16 and the fibrous material 18 are arranged as shown in FIG. 15(1). Subsequently, as shown in FIG. 15(2), the slits 17a of the fibrous material 18 are engaged with the slits 17 at both ends of the first fibrous material 16. Then, as shown in FIG. Next, although not shown, the slits 17 at both ends of another fibrous material 16 are engaged with the slits 17b of the fibrous material 18 described above. In this way, the two fibrous materials 16 and the two fibrous materials 18 are constrained and integrated with each other, whereby the core material 2 shown in (3) is formed. After that, the vacuum heat insulating material 1 is manufactured in the same steps as in the first embodiment.

By engaging the slits 17 formed in the fibrous material 16 with the slits 17a and 17b formed in the fibrous material 8, the shape of the core material 2 is held. Thus, the vacuum heat insulating material 1 of the present embodiment has the same effect as the vacuum heat insulating material of the first embodiment.

Moreover, in Embodiment 1, the fiber material 8 is inserted into the slit 7 formed in the fiber material 6 . Therefore, after depressurizing and sealing the inside of the outer packaging material 3 in the vacuum packaging process, the portion of the vacuum heat insulating material 1 where the fiber material 8 is inserted becomes thicker, and the portion where the slit 7 is not formed becomes thinner. However, according to this embodiment, the fibrous materials having the slits are engaged with each other, and the fibrous materials 16 and 18 are in surface contact. Therefore, the thickness of the core material 2 becomes uniform over the entire surface, and the thickness of the vacuum heat insulating material 1 becomes uniform even after depressurization and sealing.

[Embodiment 3]
As shown in FIG. 16, the method for manufacturing the vacuum heat insulating material 1 of this embodiment includes a core material manufacturing process, an outer packaging material inserting process, a drying process, and a vacuum packaging process.

1. Core Manufacturing Process First, a plurality of strip-shaped fiber materials 26 are produced from glass wool offcuts. Next, as shown in FIG. 17, by interweaving strip-shaped fibrous materials 26, each fiber 26 is constrained by another fibrous material 26, and these fibrous materials 26 are integrated. Further, when the fiber material 26 is woven, the core material 2 can be kept thinner by increasing the tension of the fiber material 26 . Furthermore, in the present embodiment, by weaving the fibrous materials 26, large friction is generated between the fibrous materials 26, and the restoring force of the core material 2 is limited. Therefore, in this embodiment, in such a case, the step of compressing the core material 2 can be omitted.

2. Step of Inserting Outer Wrapping Material The core 2 obtained in the preceding step is inserted into the outer wrapping 3 . Since the compression step in Embodiment 1 described above can be omitted, it is possible to manufacture the outer wrapping material 3 in which an opening portion is provided in advance, and to insert the core material 2 through the opening portion.

3. Drying Step Next, in the drying step, the outer wrapping material 3 containing the core material 2 is placed on a drying table and put into a drying furnace. As described above, since the restoring force of the core member 2 is limited, the regulating plate can be omitted.

4. Vacuum packaging process The outer packaging material 3 containing the core material 2 is placed in a vacuum container. Next, the adsorbent 4 is inserted into the outer wrapping material 3, the inside of the vacuum vessel is evacuated, the pressure inside the outer wrapping material 3 is reduced, and the opening is sealed.

According to this embodiment, the load on the environment is reduced as in the first embodiment. Furthermore, in the present embodiment, since the core material 2 is formed by weaving together strip-shaped fiber materials 26 and integrating them, the restoring force of the core material 2 is limited. Therefore, the step of compressing the core material 2 can be omitted, and the core material 2 can be easily inserted into the outer wrapping material 3 .

In this embodiment, only one set of core material 2 obtained by weaving a plurality of fiber materials 6 is used, but two or more sets of this core material 2 are manufactured and laminated to form one core material. good too.

[Embodiment 4]
The fourth embodiment differs from the third embodiment in the points described below, but is basically the same as the third embodiment in other respects.

In the present embodiment, similarly to the other embodiments, the core material 2 is manufactured using rectangular parallelepiped glass wool offcuts. As shown in FIG. 18, intermittent slits 37 are formed parallel to the long sides of a rectangular parallelepiped fiber material 36 . A plurality of similar rows of slits are formed, and at this time, in the short side direction of the fibrous material 36, the portions where the slits 37 are formed and the portions where the slits 37 are not formed are alternately arranged. In a similar manner, fabric 36' having a shape similar to fabric 36 is produced.

Next, a plurality of strip-shaped fibrous materials 38 are produced from the offcuts of glass wool. The width of the fibrous material 38 is preferably equal to the width of the slit 37, but it may be smaller than the width of the slit 37 as long as it is restrained and does not move after being passed through the slit 37.

Next, a textile material 38 is woven into the slits 37 of the textile materials 36, 36'. First, as shown in FIG. 18, the fibrous materials 36 and 36' are arranged so that their long sides are adjacent to each other. Next, the fiber material 38 is passed through the slit 37 closest to the long side of the upper end of the drawing of the fiber material 36 from the upper surface to the lower surface of the fiber material 36 . Further, the fiber material 38 is passed through the slit 37 from the lower surface of the fiber material 36 toward the upper surface. This operation is repeated until the slit 37 near the long side of the fibrous material 36' is reached.

A similar operation is performed for the other rows of slits 37 . Here, the fiber material 38 is inserted into each slit 37 from the opposite side of the adjacent row, that is, from the bottom side. By sequentially repeating this process and weaving the fiber material 38 into all the slits 37 as shown in FIG. 19, the two fiber materials 36 and the plurality of fiber materials 38 are bound to each other. In addition, the degree of expansion and contraction of the fibrous materials 36, 36', 38 after being woven is adjusted to obtain the desired thickness of the vacuum insulation material. However, it may be made larger than the thickness of the vacuum heat insulating material 1 in consideration of being compressed in the vacuum packaging process. By doing so, the fabrics 36, 36' and 38 are brought together and compressed relative to their original state. Thus, the core material 2 is manufactured. After that, the vacuum heat insulating material 1 is produced in the same steps as in the third embodiment.

According to this embodiment, the load on the environment is reduced as in the first embodiment. Furthermore, as described above, in the present embodiment, the core material 2 is formed by constraining the fibrous material 38 with the slits 37 formed in the fibrous materials 36 and 36' and integrating them. Furthermore, since the core material 2 can be maintained in a state thinner than the original thickness in which the fiber material 36 and the fiber material 38 are stacked in the thickness direction, it can be easily inserted into the outer wrapping material 3 .

In the present embodiment, two fiber materials 36 and 36' are used as fiber materials having slits 37 formed therein. may be used.

In each of the embodiments of the present disclosure, the core material 2 was made using glass wool offcuts, but any of these may be freshly cut from commercially available glass wool rolls or boards to form the fibrous material 36, 36' or 38. may be used as
The structure, material, and manufacturing process of the outer wrapping material 3 can be changed as appropriate.

While several embodiments of the disclosure have been described, these embodiments are provided by way of example and are not intended to limit the scope of the disclosure. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the gist of the disclosure. These embodiments, modifications thereof, and the like are included in the scope and gist of the disclosure, and are included in the disclosure described in the claims and the scope of equivalents thereof.

1 vacuum insulation material 2 core material 3 outer wrapping material 4 adsorbent 5 film 6 fibrous material 7 slit 8 fibrous material 9 welding seal part 10 welding sealing machine 11 press machine 12 sealing jig , 16 textile material, 17 slit, 17a slit, 17b slit, 18 textile material, 20 drying table, 21a regulation plate, 21b regulation plate, 21c regulation plate, 21d regulation plate, 26 textile material, 27 slit, 28 textile material, 30 Vacuum container, 31 regulating plate, 32 welding and sealing machine, 36 textile material, 36' textile material, 37 slit, 38 textile material, 51 resin film, 52 gas barrier layer, 53 thermal welding layer.

Claims (9)

a step of forming a core material and an outer packaging material having a gas barrier property to accommodate the core material;
a step of decompressing the inside of the outer wrapping material to create a vacuum;
a step of sealing the opening of the outer wrapping material;
a step of integrating a plurality of fibrous materials and binding one fibrous material and another fibrous material among the plurality of fibrous materials to each other to produce the core material;
A method of manufacturing vacuum insulation, comprising: forming slits in at least one of the plurality of fibrous materials;
2. The method of manufacturing a vacuum insulation material according to claim 1, wherein another fibrous material is engaged with the slit to constrain the other fibrous material to the fibrous material. forming slits in two or more fibrous materials,
inserting the other fibrous material into the slit and connecting two or more fibrous materials having the slit;
3. The method of manufacturing a vacuum heat insulating material according to claim 1, wherein the two or more fibrous materials in which the slits are formed and the other fibrous material are constrained to each other. forming slits in two or more fibrous materials from the ends of the fibrous materials;
3. The method of manufacturing a vacuum insulation material according to claim 1, wherein the slit of one of the fibrous materials and the slit of another of the fibrous materials are engaged to bind the two or more fibrous materials to each other. . Multiple fibrous materials are woven together,
2. The method of manufacturing a vacuum insulation panel according to claim 1, wherein the plurality of fibrous materials are constrained to each other. At least one of the fibrous materials is provided with a plurality of rows of intermittent slits parallel to the sides of the fibrous material,
weaving another fibrous material into the intermittent slits;
3. The method of manufacturing a vacuum heat insulating material according to claim 1, wherein the other fibrous material is bound to the fibrous material in which the intermittent slits are formed. The method for manufacturing a vacuum insulation panel according to any one of claims 1 to 6, wherein said fibrous material is glass wool. The method for manufacturing a vacuum insulation material according to any one of claims 1 to 7, wherein no binder is added to the core material and the core material is not pressurized before putting the core material into the outer wrapping material. an outer packaging material formed by stacking stacked films having gas barrier properties and welding the edges of the films;
a core material housed inside the outer wrapping material,
The inside of the outer packaging material is evacuated,
The core material includes a plurality of fibrous materials, and at least one fibrous material among the plurality of fibrous materials constrains other fibrous materials to integrate the plurality of fibrous materials. vacuum insulation.

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