KR20070013216A - Vacuum heat insulating material and manufacturing method thereof - Google Patents

Abstract

A vacuum insulation material and a method for manufacturing the vacuum insulation material are provided to reduce the manufacturing cost by reusing wasted materials. A vacuum insulation material receives a core material including a fiber polymer in an outer material(1) having a gas barrier property. The insulation material includes a rectangular fiber polymer, a lead-shaped fiber polymer, and an inner material(2). The rectangular fiber polymer, the lead-shaped fiber polymer, and the inner material are provided in the interior of the outer material. The rectangular fiber polymer does not include a binder. The lead-shaped fiber polymer does not include a binder. The inner material surrounds the lead-shaped fiber polymer. The pressure in the interior of the outer material including the inner material is reduced to a vacuum state. The ratio of the lead-shaped fiber polymer to the entire core is 10 to 80 wt%.

Description

Vacuum Heat Insulating Material And Manufacturing Method Thereof}

1 is a cross-sectional view of a vacuum insulator of a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state in which a new material is cut in the manufacturing process of the vacuum insulator of FIG. 1; FIG.

Fig. 3 is a perspective view showing a state in which a new material 3, a waste material 4, and an adsorbent 5 are combined in the manufacturing process.

Fig. 4 is a cross-sectional view showing a state in which the core material is accommodated in the inclusion material in the above manufacturing process, and the pressure is reduced and sealed.

Fig. 5 is a perspective view showing a state in which a core material A is surrounded by an inner packaging material in the manufacturing step.

Fig. 6 is a perspective view showing the core material of the vacuum insulator of the second embodiment of the present invention.

Fig. 7 is a sectional view showing the core material of the vacuum insulator of the third embodiment of the present invention.

8 is a perspective view illustrating a core material of a vacuum insulator of a comparative example.

9 is a characteristic diagram showing a relationship of initial thermal conductivity with respect to waste amount of a vacuum insulator.

<Explanation of symbols for the main parts of the drawings>

1: envelope material

2: nesting material

2a: bottom film

2b: top film

3: new

4: waste wood

5: adsorbent

6: waste material layer

8: press plate

9: sealing bar

10: heartwood

10A: Core material

11 sealing part

12: opening

20: vacuum insulation

[Document 1] Japanese Unexamined Patent Publication No. 2004-60794

This invention relates to a vacuum heat insulating material and its manufacturing method, and is especially suitable for the vacuum heat insulating material using waste material and its manufacturing method.

The use of the waste material of the vacuum heat insulating material using a fiber material has the thing of Unexamined-Japanese-Patent No. 2004-60794 (patent document 1). In this patent document 1, the molded article used as the base material of the core material which solidified with the binder by compression molding an inorganic fiber aggregate is formed, it is set as the sheet-shaped inorganic fiber aggregate of a required size except the edge part of the said molded object, and a core material is taken out from a molded object. After that, the waste material of the remaining inorganic fiber aggregate is pulverized, the pulverized material is mixed as an intermediate layer of the sheet-shaped inorganic fiber aggregate, compression molded, and solidified again into a binder, and the core is stored in an envelope (envelope). The vacuum insulator was obtained by depressurizing the inside of the outer cover material. According to this vacuum heat insulating material, waste of waste material can be reduced and a resource can be utilized effectively.

[Patent Document 1] Japanese Unexamined Patent Publication No. 2004-60794

However, in the vacuum heat insulating material of patent document 1, since the crushed material of waste material was mixed between the sheet-like inorganic fiber assemblies to be laminated as an intermediate | middle layer, the adhesion of this intermediate | middle layer part is weak, and peeling will generate | occur | produce in an intermediate | middle layer part at the time of handling a core material. There was a problem. Moreover, the electric and thermal energy at the time of spray-molding by thermal spraying of a binder expands and it became a vacuum heat insulating material with a big load on an environment from a global warming viewpoint.

On the other hand, there is no example of reuse of the waste material from the inorganic fiber aggregate which does not contain a binder, and it was selected as either a recycling process or a disposal process to return to a raw material. In any case, since the inorganic fiber aggregate which does not contain a binder has a small mass compared with a large volume in appearance, collection | transport transportation cost and processing cost become comparatively expensive, and the cost burden became large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides a vacuum insulator and a method for manufacturing the same, which can improve the handleability of the core material, reduce the electric and thermal energy during manufacturing, and reduce the cost by reusing the waste material containing no binder. For the purpose of

The 1st aspect of this invention for achieving the objective mentioned above is a vacuum heat insulating material which accommodated the core material which consists of a fiber polymer in the outer cover material which has gas barrier property,

In the inner cover material is provided a rectangular-shaped fibrous polymer containing no binder, a lead-shaped fibrous polymer containing no binder, and an inclusion material surrounding the lead-shaped fibrous polymer,

The inside of the cover material including the cover material is vacuumed.

The more preferable specific structural example in this 1st aspect of this invention is as follows.

(1) The ratio of the said lead-shaped fiber polymer with respect to the said whole core material is 10 to 80 weight%.

(2) The upper limb inclusion is formed of a heat-weldable polyethylene film having a density of at least 0.910 g / cm 3 and a thickness of 5 to 50 µm.

(3) The said lead-shaped fiber polymer is sandwiched by the said rectangular-shaped fiber polymer.

(4) A granular adsorbent interspersed between the lead-like fiber polymers.

The 2nd aspect of this invention is the vacuum heat insulating material which accommodated the core material which has the waste material which consists of a fiber polymer in the outer cover material which has a gas barrier property, The said core material is waste material which consists of a fiber polymer which does not contain a binder, and surrounds this waste material. It is comprised by including the inside material, The inside of the said inside material containing the inside of said inside material is depressurized, and is in a vacuum state.

The more preferable specific structural example in this 2nd aspect of this invention is as follows.

(1) The said core material is the said waste material which consists of an inorganic fiber polymer which does not contain a binder, the new material which consists of an inorganic fiber polymer which does not contain a binder, and the said waste material and the said both surrounding each said material, respectively It is provided with the inclusion material.

(2) The ratio of the said waste material with respect to the said whole core material is 10 to 80 weight%.

(3) The inclusion material is formed of a heat weldable polyethylene film having a density of at least 0.910 g / cm 3 and a thickness of 5 to 50 µm.

(4) The said core material is equipped with the said waste material which consists of multiple layers, and the granular adsorbent scattered between the said waste materials.

(5) The core material is provided with a granular adsorbent interspersed between the new material and the waste material.

Moreover, the 3rd aspect of this invention is a manufacturing method of the vacuum heat insulating material which accommodates the core material which consists of a fiber polymer in the outer cover material which has gas barrier property,

Cutting a laminate of inorganic fibers not containing a binder to obtain a lead-shaped inorganic fiber polymer together with a rectangular inorganic fiber polymer;

Wrapping and compressing and depressurizing the lead-shaped inorganic fiber polymer with an inner material;

The inorganic fiber polymer surrounded by the said inner wrapping material is accommodated together with the said wrapping material in the said wrapping material, and the inside of the wrapping material is pressure-reduced to make it vacuum, and the said wrapping material is provided with the process of sealing.

The more preferable specific structural example in this 3rd aspect of this invention is as follows.

(1) Compressing and depressurizing the said inorganic fiber polymer enclosed by the said wrapping material so that it may become 50% or less of initial stage thickness.

(2) Forming a layer by juxtaposing a plurality of said lead-shaped inorganic fiber polymers in planar shape on the said rectangular-shaped inorganic fiber polymer.

Moreover, the 4th aspect of this invention is a manufacturing method of the vacuum heat insulating material which accommodated the core material which has the waste material which consists of a fiber polymer in the outer cover material which has a gas barrier property, and includes the said waste material which consists of a fiber polymer which does not contain a binder. After enclosing and compressing and depressurizing, this inner material is sealed and made into the said core material, this core material is accommodated in the said outer material, and the sealing of the said inner material is unsealed, and the inside of the outer material containing the said inner material is decompressed, After making it into a vacuum state, the said cover material is sealed and it is set as a vacuum heat insulating material.

The more preferable specific structural example in this 4th aspect of this invention is as follows.

(1) The said core material is formed by surrounding the new material which consists of an inorganic fiber polymer which does not contain a binder with the said waste material which consists of an inorganic fiber polymer which does not contain a binder, and forms the said core material.

(2) After compressing and depressurizing the inorganic fiber polymer composed of the new material and the waste material to 50% or less of the initial thickness, the inner material is sealed to form the core material, and the core material is surrounded by the outer material and further Restoring the seal until the outer circumferential length of the core is substantially the same dimension as the inner circumferential length of the envelope.

(3) A waste material layer is formed by juxtaposing a plurality of lead-like waste materials generated when cutting the new material into a predetermined shape in a plane shape on the new material.

EMBODIMENT OF THE INVENTION Hereinafter, several embodiment of this invention is described using drawing. The same code | symbol in the drawing of each embodiment shows the same or equivalent.

(1st embodiment)

The vacuum insulator of the 1st Embodiment of this invention and its manufacturing method are demonstrated using FIGS.

First, the structure of the vacuum heat insulating material 20 of this embodiment is demonstrated, referring FIG. 1 is a cross-sectional view of a vacuum insulator 20 according to a first embodiment of the present invention.

This vacuum heat insulating material 20 is comprised with the core material 10 and the outer cover material 1 which has the gas barrier property which accommodated this core material 10, pressure-reduced the inside, and welded and sealed the periphery part. This vacuum heat insulating material 20 is comprised from the flat rectangular panel.

The core material 10 includes a new material 3 made of an inorganic fiber polymer not containing a binder, a waste material 4 made of an inorganic fiber polymer not containing a binder, a granular adsorbent 5, and a new material 3 And the containment material 2 which accommodated the waste material and the adsorbent 5, and is comprised. Since the inorganic fiber polymer which comprises the new material 3 and the waste material 4 is accommodated in the inner packing material 2, it is not necessary to solidify the new material 3 and the waste material 4 with a binder. Therefore, the electrical and thermal energy at the time of manufacture can be reduced compared with the conventional vacuum heat insulating material using a binder, and the cost reduction by reusing the waste material which does not contain a binder can be aimed at. Moreover, since it is set as the core material 10 which accommodated the waste material 4 in the enclosure 2, it can be made excellent in the handleability of the core material 10. FIG. In addition, by not using an inorganic binder having easy-to-moisture-proof properties, it is possible to provide a vacuum insulator with stable thermal insulation performance while providing a very small amount of water in the new material 3 and the waste material 4, while using an organic binder. By not doing so, deterioration with the passage of time of the heat insulating performance by the gas generated from the organic binder can be prevented.

The new material 3 is comprised from the chuck | zipper layer of the glass wool of an average fiber diameter of 4 micrometers. As the waste material 4, a fragment of this new material 3 is used. Instead of the glass wool laminate, an inorganic fiber laminate such as glass fiber, alumina fibers, silica alumina fibers or the like may be used.

The inclusion material 2 is made of a synthetic resin film such as a polyethylene film having a thickness of about 20 μm that can be heat welded. The inner packaging material 2 is formed in the bag shape by welding the peripheral parts of two rectangular films. In addition, when the thickness of the inclusion material 2 is set to about 20 µm, the flammability of the inclusion material 2 is ensured, the core material is placed in the inclusion material 2, and the core material of the inclusion material 2 is inserted after pressure reduction. It is easy to make heat welding jig because of good condition for heat welding the opening. The inclusion material 2 is a polyethylene film having a density of 0.910 g / cm 3 or more, and the thickness of the film is 5 to 50 µm, so that leakage due to breakage when compression-sealing the core material 10A is performed. Since a defect can be reduced and the negative pressure state after compression sealing can be maintained for a long time, the vacuum heat insulating material using the core material 10 with good handleability can be provided.

The outer cover material 1 is comprised from the laminated film provided with the gas barrier layer which prevents gas permeation, and the plastic film for heat welding provided in the inside. Specifically, the outer cover material 1 uses 15 micrometers polyamide synthetic fiber resin, sets the aluminum metal vapor deposition film 400-500 kPa, uses 12 micrometers polyethylene terephthalate resin as a support layer of the said vapor deposition film, Aluminum foil is 6 micrometers, and it is comprised from the aluminum film using 50 micrometers high density polyethylene resin as a welding film layer.

The core material 10 is arranged without a gap with respect to the outer cover material 1, and is accommodated in the outer cover material 1 so as to have an outer circumferential length substantially matching the inner circumferential length of the outer cover material 1. In other words, the ear parts 19a made on three sides of the outer cover material 1 are short and close to the side surface of the core material 10. Thereby, it is not necessary to perform the big ears of the three sides 19a, and it is the vacuum heat insulating material 20 which can solve the various problems at the time of assembly of the refrigerator caused by having big ear parts.

Next, the manufacturing method of the vacuum heat insulating material 20 of 1st Embodiment is demonstrated, referring FIGS. 2-5 which show each manufacturing process of 1st Embodiment. 2 is a perspective view showing a state in which the new material 3 is cut, FIG. 3 is a perspective view showing a state in which the new material 3, the waste material 4 and the adsorbent 5 are combined, and FIG. 4 is a core material 10A. Is a cross-sectional view showing a state in which the inner packaging material 2 is stored in the inner packaging material 2 under reduced pressure and sealed, and FIG. 5 is a perspective view showing a state in which the core base material 10A is surrounded by the inner packaging material 2.

First, as shown in FIG. 2, the edge part of the raw material of the laminated body of the inorganic fiber which does not solidify with a binder is cut | disconnected, and the new material 3 is produced. Therefore, the new material 3 is composed of a laminate of inorganic fibers having elasticity not solidified with a binder, and the waste material 4 cut from the new material 3 also has an elasticity not solidified with a binder. It consists of a laminate of fibers. In addition, in the example shown in Fig. 2, since the end portions of a plurality of raw materials are cut to produce a plurality of new materials 3 at the same time, the productivity is good. 3) may be produced. The produced new material 3 is a rectangular panel, and the cut | disconnected waste material 4 is a lead-shaped fragment.

Subsequently, the waste material 4 is laid on the upper surface of the new material 3 produced as shown in FIG. 3, and it is set as the waste material layer 6. As shown in FIG. In other words, the lead-like waste material 4, which is a fragment generated during the production of the new material 3, is juxtaposed on the upper surface of the new material 3 so that there is no gap in the planar shape, so that the waste material layer 6 is formed. Further, the adsorbent 5 is interspersed on the upper surface of the waste material layer 6, and a new material 3 is provided on the upper surface of the waste material layer 6 to form a core material base material 10A. In other words, the waste material layer 6 is sandwiched and held between the upper and lower new materials 3, and the granular adsorbent 5 is dispersed and widely dispersed in the gap between the waste material layer 6 and the upper new materials 3. It is set as the base material 10A. Thus, even the waste material 4 which consists of an inorganic fiber aggregate which does not contain the binder which has a property with a low mass compared with a large volume in appearance can be reused easily, and it aims at cost reduction.

As for the ratio of the waste material 4 with respect to the whole core material 10, the range of 10 to 80 weight% is preferable. In consideration of the ratio of the waste material 4 generated when the new material 3 is produced, more preferably 20 to 50% by weight, and the first embodiment is 25% by weight.

As mentioned above, the surface of the core material 10 can be made flat by holding the waste material layer 6 between the upper and lower new materials 3, and is suitable when it is installed in a refrigerator or the like. In addition, by interspersing and retaining the granular adsorbent 5 in the gap between the waste material layer 6 and the new material 3, the adsorbent in the manufacturing process can be prevented from leaking and the core material of the new material 3 ( Unevenness of the surface of 10) can be suppressed. In addition, by scattering the adsorbent 5 in a wide range, the area of contact between the new material 3 and the waste layer 6 and the adsorbent 5 can be increased to facilitate adsorption of moisture and gas to the adsorbent 5, As a result, the heat insulating performance of the vacuum heat insulating material 20 can be stabilized.

Further, by filling the adsorbent 5 between the fibers of the lead-like waste material 4 and maintaining its position, the gas component remaining in the space between the fibers of the waste material 4 having no shape or length can be adsorbed. It is possible to provide a vacuum insulator capable of maintaining a heat insulation performance for a long time. Moreover, it is also possible to cut | disconnect the waste material 4, and to use it as a planar shape on the new material 3, and to use. In that case, it can spread to the end part of the new material 3, and can change the unevenness | corrugation of the surface after preparation as well as the fluctuation of a completed dimension as a vacuum heat insulating material, but when the cut waste material is smaller than 20 mm, the fluctuation of a fiber direction will become It becomes large and it becomes impossible to stabilize the heat insulation performance of the vacuum heat insulating material 20.

In addition, the waste material layer 6 may be a first waste material layer, and a lead-like waste material 4 formed in the form of a strip generated at the time of production of the new material 3 may be laid thereon and used as the second waste material layer.

Moreover, since the adsorbent 5 is thrown in from the compression sealing of the core material base material 10A by the inner wrapper 2, the adsorption ability can be exhibited effectively with respect to the adsorption characteristic which falls under vacuum pressure reduction. Thereby, water | moisture content, gas component, etc. which carry in the heat-welding organic film can be adsorb | sucked effectively, and initial stage heat insulation performance can be stabilized. In addition, the vacuum insulator generally infiltrates moisture or gas slowly through the envelope material, and thus deteriorates with time, so that the heat insulation performance is deteriorated, but the molecular insulation (13X) as the adsorbent 5 is used for a long time. Deterioration of heat insulation performance can be suppressed, and a highly reliable vacuum heat insulating material can be provided.

Next, the core material base material 10A in which the waste material layer 6 and the adsorbent 5 were sandwiched between the upper and lower new materials 3 is dried for 10 minutes in a 200 degreeC drying furnace. This is for shortening the time of the vacuum pack and stabilizing the heat insulating performance of the vacuum heat insulating material 20 by scattering the moisture adhering to the new material 3 and the waste material layer 6.

Subsequently, as shown in FIG. 4, the core material base material 10A is mounted on the lower film 2a constituting the inclusion material 2, and the upper film 2b constituting the inclusion material 2 is placed thereon. Cover. By press-compressing these with the press plate 8 arrange | positioned up and down, the air in the new material 3 and the waste material layer 6 was extruded, and the thickness of the core material base material 10A was made into 50% or less of the initial stage, As shown in FIG. As shown in the drawing, the ridgeline portion, which is the periphery of the inclusion material 2, is thermally welded to form the sealing portion 11 to form the core material 10. When the pressure by the press plate 8 is removed, the core material 10A tries to return to its original size. However, since the core material 10A is surrounded by the material 2 and is compressed and degassed by a press, the material ( 2) There is almost no air inside and it does not expand even if it tries to return to its original size. Therefore, the core material 10 becomes a plate shape, and peeling from the waste material layer 6 part does not generate | occur | produce, and the vacuum heat insulating material 20 using the core material 10 with good handleability can be provided.

As described above, the core material base material 10A is temporarily compressed into a thermally weldable organic film, so that molding can be performed without the need for heat compression or the like, thereby reducing environmental load without consuming expanded electric and thermal energy. Can be. Therefore, with the use of the waste material 4 composed of the inorganic fiber aggregate not containing the above-described binder, it is possible to significantly reduce the consumption of electrical and thermal energy and to reduce the cost, thereby providing a vacuum insulator with reduced environmental load. can do.

Moreover, the operation | work which loads the core material base material 10A on the lower film 2a which comprises the above-mentioned inner wrapper 2, and covers the upper film 2b which comprises the wrapper 2 on it is a bag-shaped thing. Compared with the case of inserting into the inner wrapper 2, the waste material 4 is less likely to overflow from the new wrapper 3, and workability is good.

Next, the compressed core material 10 is covered with the outer cover material 1 and vacuum-packed. Before performing a vacuum pack, as shown in FIG. 5, the opening 12 is provided in one side of the inner wrapping material 2 of the core 10. As shown in FIG. In this first embodiment, the vacuum pack is evacuated to 2.2 kPa, and after the vacuum is reached for 2 minutes, the opening of the outer cover material 1 is sealed.

As a result of measuring the thermal conductivity of the vacuum insulator obtained in the first embodiment with a thermal conductivity measuring instrument Otto λHC-074 manufactured by Eco Seiki Co., Ltd., an initial value of 2.2 to 2.3 mW / m · K was obtained, and a good value could be obtained. Moreover, the thermal conductivity after 10 years corresponded in 70 degreeC atmosphere was the value of 6.8 Pa / m * K. This thermal conductivity is shown in Table 1 below in comparison with the second embodiment and comparative example described later.

TABLE 1

Thermal conductivity [㎽ / m · K] First embodiment 2nd Embodiment Third embodiment Comparative example Initial value 2.2 to 2.3 2.7 2.5 1.7 to 2.2 10 years later 6.8 8.2 7.2 5.8 to 6.3

(2nd embodiment)

Next, a second embodiment of the present invention will be described with reference to FIG. Fig. 6 is a perspective view of the core 10A of the core materials used in the vacuum insulator 20 according to the second embodiment of the present invention in combination. Since this 2nd Embodiment differs from 1st Embodiment in the following point, about another point, it is basically the same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

The vacuum insulator 20 according to the second embodiment includes waste material 4 generated when the size of the new material 3 is cut from the glass wool laminate having an average fiber diameter of 4 µm without a binder. It is used for the whole and compresses and wraps the core base material 10A which consists of 100% of waste materials by the containment material 2. As shown in FIG. In other words, the waste material layer 6 is comprised of three layers, and the granular adsorbent 5 is scattered in a wide range between the waste material layers 6.

As a result of measuring the thermal conductivity of the vacuum insulator 20 obtained in the second embodiment with a thermal conductivity measuring instrument Otto λHC-074 manufactured by Eco Seiki Co., Ltd., an initial value of 2.7 kW / m · K was obtained, and a good value was obtained. In addition, the thermal conductivity after the equivalent of 10 years in a 70 ° C. atmosphere is 8.5 kW / m · K, which is inferior to that of the first embodiment. It is enough.

(Third embodiment)

Next, a third embodiment of the present invention will be described with reference to FIG. 8 is a cross-sectional view of a combination of core material base materials 10B used in the vacuum insulator 20 according to the third embodiment of the present invention. Since this 3rd Embodiment differs from 1st Embodiment in the following point, about another point, it is basically the same as 1st Embodiment, and the overlapping description is abbreviate | omitted.

The vacuum heat insulating material 20 of this 3rd embodiment uses the new material 3 which consists of an inorganic fiber polymer which does not contain a binder, and the core material which consists of the said waste material 4, and compresses and wraps the said core material, respectively. As a result of measuring the thermal conductivity of the vacuum insulator 20 obtained in the third embodiment by the thermal conductivity measuring instrument Otto λHC-074 manufactured by Eco Seiki Co., Ltd., an initial value of 2.5 kW / m · K was able to obtain a good value. The thermal conductivity after the equivalent of 10 years in a 70 ° C. atmosphere is 7.2 kPa / m · K, which is lower than that of the first embodiment. The heat insulation effect of a vacuum heat insulating material is fully exhibited.

(Comparative Example)

Next, the comparative example is demonstrated using FIG. Fig. 7 is a perspective view of the core 10A of the core materials used for the vacuum insulator 20 of the comparative example. This comparative example is different from 1st Embodiment in the following point, and since it is fundamentally the same as 1st Embodiment about another point, the overlapping description is abbreviate | omitted.

In the vacuum insulator 20 of this comparative example, two layers of the new material 3 made of a glass wool laminate having an average fiber diameter of 4 µm containing no binder were used for the entire core material base material 10A, and made of 100% new material. Core material base material (10A) is a compression packaging of the inner material (2).

As a result of measuring the thermal conductivity of the vacuum insulator 20 obtained in this comparative example with a thermal conductivity measuring instrument Otto λHC-074 manufactured by Eco Seiki Co., Ltd., an initial value of 1.7 to 2.2 mW / m · K was obtained. The thermal conductivity after 10-degree equivalent process in 70 degreeC atmosphere was the value of 5.8-6.3 Pa / m * K.

(Ratio of waste materials)

By varying the ratio between the new material (3) and the waste material (4) to produce a vacuum insulator 20, the initial thermal conductivity of the vacuum insulator 20 was measured with a thermal conductivity measuring instrument Otto λ HC-074 manufactured by Eco Seiki Co., Ltd. The results shown in Table 2 were obtained. The relationship between these waste materials and the thermal conductivity is shown in Tables 1 and 9 as shown in Tables and Drawings. It can be seen from Table 1 and FIG. 9 that the initial material performance can be satisfactorily secured while the waste material is in the range of 25% to 80% in order to effectively utilize the waste material 4.

TABLE 2

Waste% [%] Initial performance [㎽ / m · K] 0 2.0 25 2.2 50 2.2 80 2.4 100 2.7

According to the vacuum insulator of the present invention and its manufacturing method, it is possible to improve the handleability of the core material, to reduce the electrical and thermal energy during production, and to reduce the cost by recycling the waste material containing no binder.

Claims (18)

It is a vacuum heat insulating material which accommodated the core material which consists of a fiber polymer in the outer cover material which has gas barrier property, Inside the outer cover material is provided with a rectangular-shaped fiber polymer containing no binder, a lead-shaped fiber polymer containing no binder, and an inclusion material surrounding the lead-shaped fiber polymer, A vacuum insulator, characterized in that the inside of the outer cover material including the inner cover material is decompressed and in a vacuum state. The vacuum insulator of claim 1, wherein a ratio of the lead-like fiber polymer to the entire core is 10 to 80% by weight. The vacuum insulator according to claim 1 or 2, wherein the inclusion material is formed of a heat-weldable polyethylene film having a density of at least 0.910 g / cm 3 and a thickness of 5 to 50 µm. The vacuum insulator of claim 1, wherein the lead-like fiber polymer is sandwiched by the rectangular fiber polymer. The vacuum insulator of claim 4, further comprising a granular adsorbent interspersed between the lead-like fibrous polymers. It is a vacuum heat insulating material which accommodated the core material which has the waste material which consists of a fiber polymer in the outer cover material which has gas barrier property, The core material comprises a waste material made of a fiber polymer containing no binder and an inclusion material surrounding the waste material, The inside of the cover material including the inside of the cover material is a vacuum insulated, characterized in that the vacuum state. The said core material is a waste material which consists of an inorganic fiber polymer which does not contain a binder, the new material which consists of an inorganic fiber polymer which does not contain a binder, and the said inner material which surrounds both or each of the said waste material and the said new material together, respectively. A vacuum insulator, comprising: ash. 8. The vacuum insulator according to claim 7, wherein the ratio of the waste material to the whole core material is 10 to 80% by weight. The vacuum insulator according to any one of claims 6 to 8, wherein the inclusion material is formed of a heat weldable polyethylene film having a density of at least 0.910 g / cm 3 and a thickness of 5 to 50 µm. 7. The vacuum insulator according to claim 6, wherein the core member includes a plurality of layers of the waste material and granular adsorbents interspersed between the waste material. 8. The vacuum insulator according to claim 7, wherein the core member has a granular adsorbent interspersed between the new material and the waste material. In the manufacturing method of the vacuum heat insulating material which accommodates the core material which consists of a fiber polymer in the outer cover material which has gas barrier property, Cutting a laminate of inorganic fibers not containing a binder to obtain a lead-shaped inorganic fiber polymer together with a rectangular inorganic fiber polymer; Wrapping and compressing and depressurizing the lead-shaped inorganic fiber polymer with an inner material; And a step of sealing the envelope material after storing the inorganic fiber polymer surrounded by the envelope material together with the envelope material in the envelope material, and reducing the inside of the envelope material under reduced pressure to a vacuum state. Method of preparation. The method for manufacturing a vacuum insulator according to claim 12, wherein the inorganic fiber polymer surrounded by the encapsulant is compressed and depressurized to be 50% or less of an initial thickness. The method of manufacturing a vacuum insulator according to claim 12, wherein a plurality of the lead-shaped inorganic fiber polymers are juxtaposed in a planar shape on the rectangular inorganic fiber polymer to form a layer. In the manufacturing method of the vacuum heat insulating material which accommodated the core material which has the waste material which consists of a fiber polymer in the outer cover material which has gas barrier property, After enclosing the said waste material which consists of a fiber polymer which does not contain a binder, and compressing and decompressing | reducing it, it is sealed and made into the said core material, The core material is accommodated in the envelope and the sealing of the envelope is released to depressurize the interior of the envelope including the interior of the envelope to reduce the vacuum to seal the envelope, thereby sealing the envelope to form a vacuum insulator. The manufacturing method of the vacuum insulation material to make. 16. The vacuum insulation material according to claim 15, wherein the core material is formed by enclosing a new material made of an inorganic fiber polymer that does not include a binder together with the waste material made of an inorganic fiber polymer that does not contain a binder. Way. 17. The method of claim 16, after compressing and depressurizing the inorganic fiber polymer composed of the new material and the waste material to 50% or less of the initial thickness, sealing the inner material to form the core material, and surrounding the core material with the outer material And releasing the sealing of the inner wrapping material until the outer circumferential length of the core member is substantially the same as the inner circumferential length of the outer wrapping material. The manufacturing method of the vacuum heat insulating material of Claim 15 characterized by forming a waste material layer by juxtaposing a plurality of lead-like waste materials which generate | occur | produce when cutting the said new material into a predetermined shape in parallel on the said new material.

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