KR20170090889A - Vacuum Insulation Panel - Google Patents

Abstract

The present invention provides a vacuum insulation panel, comprising: a core material; and a sealing member including a pair of laminates that are located on both sides of the core material and configured to cover the core material. Each of the pair of laminates includes a heat fusion layer, a blocking layer, and a protective layer, which are sequentially laminated with respect to the core material. In addition, outer peripheral portions of the pair of laminates are fused to form an envelope shape, and one or more of the pair of laminates include an inorganic-deposition film as a blocking layer. Also, an aluminum foil is additionally provided between the heat fusion layer of the laminates including the inorganic-deposition film and the core material, and thermally fused. The core material is formed by a glass fiber composition comprising 61 to 66 wt% of SiO_2, 0.1 to 2.5 wt% of Al_2O_3, 4 to 8 wt% of B_2O_3, 12 to 17 wt% of Na_2O and K_2O, and 9 to 15 wt% of CaO and MgO.

Description

Vacuum Insulation Panel [0002]

More particularly, the present invention relates to a vacuum insulation material having excellent barrier properties, durability and impact resistance while minimizing thermal bridging as well as being eco-friendly because of excellent biodegradability.

Vacuum insulation material is a material that shows the excellent heat insulation performance more than five times compared with existing oil / inorganic insulation materials by blocking the convection inside the insulation by vacuuming the inside of the insulation.

Such a vacuum insulation material is mainly composed of a core material, a sealing member of a multilayered film as a sheathing material, and a getter for removing a gas component flowing into the sheathing material.

Among them, the sealing member is an indispensable element for maintaining the vacuum degree of the vacuum insulation material, and in particular, it plays a role of maintaining the degree of vacuum inside the vacuum insulation material. If the air permeability, that is, the sealing member having a low barrier property is used, external gas and moisture may be introduced during long-time use of the product, and in this process, the degree of vacuum is lowered and the heat insulating property is lowered. Also, if the strength of the sealing member is low, there is a high probability that a pinhole will be generated even in a small impact, so that there is a risk that the degree of vacuum easily breaks.

The conventional air-permeable sealing member is made of aluminum metal as a barrier layer, and a protective layer made of plastic film such as nylon / polyethylene terephthalate (PET) / oriented polypropylene (OPP) is laminated on one side of the barrier layer, On the other side of the layer is a laminated structure of thermally fusible layers made of polyethylene, which is most often used as a jacking material for a vacuum insulation for a refrigerator having a durability of 10 to 15 years. The aluminum metal is an excellent material as a barrier layer because it is excellent in initial insulation property, durability and impact resistance at the time of long-term use, but has a disadvantage of transferring heat since it is a metal component. That is, a heat bridge is generated in which heat is moved to the opposite side by aluminum, which may lower the heat insulating property.

Korean Patent Publication No. 10-2012-0033168 discloses a core material; And a sealing member for sealing the outer periphery of a pair of laminated films including an evaporated film on which an inorganic layer is deposited and fused to form an envelope and accommodating the core material, However, the vacuum insulation material has a high defect rate and low durability, so that the vacuum insulation material can not be used as a vacuum insulation material for construction.

On the other hand, glass wool is mainly used as a core material of vacuum insulation, but if the broken glass fibers are sucked into the lungs by respiration and accumulated, it may cause harm to the human body and increase the solubility in the physiological medium, Studies on the biodegradable glass fiber composition capable of minimizing the possibility have been underway (see Korean Patent Publication No. 10-2005-0104728).

Korean Patent Publication No. 10-2012-0033168 Korean Patent Publication No. 10-2005-0104728

The present invention provides a vacuum insulation material excellent in barrier property, durability and impact resistance while being excellent in biodegradability and minimizing thermal bridging.

On the other hand,

And a sealing member including a pair of stacked members positioned to sandwich the core member and surround the core member,

Wherein each of the pair of stacked bodies includes a heat-sealable layer, a barrier layer, and a protective layer that are sequentially stacked on the core, and the outer peripheral portions of the pair of stacked bodies are fused to form an envelope, At least one of which comprises an inorganic-vapor-deposited film as a barrier layer,

An aluminum foil is additionally provided between the heat-sealable layer and the core material of the laminate including the inorganic-vapor-deposited film and is thermally fused,

Wherein the core comprises 61 to 66% by weight SiO ₂ , 0.1 to 2.5% by weight Al ₂ O ₃ , 4 to 8% by weight B ₂ O ₃ , 12 to 17% by weight Na ₂ O and K ₂ O, By weight based on the total weight of the glass fiber composition.

In an embodiment of the present invention, the size of the aluminum foil is smaller than the core.

In one embodiment of the present invention, the heat welding of the aluminum foil can be performed by further heat-treating the vacuum insulation material at a temperature of 110 to 200 DEG C for 0.1 to 30 minutes.

In one embodiment of the present invention, the inorganic-vapor deposition film is formed from the group consisting of inorganic-vapor deposited polyethylene terephthalate, inorganic-vapor-grown ethylene vinyl alcohol, inorganic-vapor-deposited polyvinyl alcohol (PVOH) and inorganic- Can be selected.

The vacuum insulator of the present invention is excellent in biodegradability and is not only eco-friendly, but also has barrier properties, durability and impact resistance at the same time while minimizing thermal bridging.

1 is a perspective view showing the structure of a vacuum insulation material to which the present invention is applied.
2 is a sectional view of a vacuum insulator according to an embodiment of the present invention.
3 is a sectional view of a vacuum insulator according to another embodiment of the present invention.

Hereinafter, the present invention will be described in more detail.

FIG. 1 is a perspective view showing the structure of a vacuum insulation material to which the present invention is applied, FIG. 2 is a sectional view showing a structure of a vacuum insulation material according to an embodiment of the present invention, Fig. 7 is a cross-sectional view showing another embodiment of the invention.

1 to 3, a vacuum insulator according to an embodiment of the present invention includes a core member 100, a sealing member 200 surrounding the core member, and a gas adsorbent (not shown) for removing gas introduced into the sealing member. (300).

The core 100 is held in the form of a vacuum insulation panel, and serves to secure a vacuum space therein and, SiO ₂ 61 to 66% by weight, Al ₂ O ₃ 0.1 to 2.5% by weight, B ₂ O ₃ 4 to 8% by weight, Na ₂ O and K ₂ O 12 to 17% by weight, and CaO and MgO 9 to 15% by weight, and is excellent in biodegradability and water resistance.

The core material 100 according to one embodiment of the present invention can be readily prepared from the glass fiber composition using a rotary process known in the art without the addition of phenol-formaldehyde binders and other binders .

The core member 100 has a small pore size inside the core member, so that the durability of the vacuum insulation member can be improved as compared with the case of using a conventional core member.

The sealing member 200 includes a pair of stacked bodies 200a and 200b and each stacked body includes a heat-sealable layer 210, a barrier layer 220, And a protective layer 230 may be sequentially stacked.

Each of the stacked bodies having such a configuration can be formed in an envelope shape by the outer peripheral portion (d) of the two stacked bodies being fused to each other with the protective layer (230) facing outward with respect to the core member (100). In one embodiment, one or both stacks of the pair of stacks may include the inorganic-deposited film 220i as the barrier layer 220. [ In one embodiment of the present invention, when the laminate includes the inorganic-vapor-deposited film 220i, an aluminum foil 400 is additionally provided between the heat-sealable layer 210 of the laminate and the core material 100, And may be thermally fused between the heat-sealable layer 210 and the core material 100.

2, the first stacked body 200a of the pair of stacked bodies 200a and 200b constituting the sealing member 200 may be formed of an inorganic material -V deposition film 220i and the second laminate 200b may include an aluminum thin film 220a as the barrier layer 220. [ Specifically, the first laminate 200a has a structure in which an inorganic-vapor-deposited film 220i and a protective layer 230 are sequentially laminated as a heat-sealable layer 210, a barrier layer 220, and a second laminate 200b may have a structure in which a thermal fusion layer 210 and an aluminum thin film 220a and a protective layer 230 are sequentially stacked as a barrier layer 220. [

In another embodiment of the present invention as illustrated in FIG. 3, the pair of stacked bodies 200a and 200b constituting the sealing member 200 all include the inorganic-vapor-deposited film 220i as the blocking layer 220 . Specifically, the first layered product 200a and the second layered product 200b are formed by sequentially stacking the inorganic-vapor-deposited film 220i and the protective layer 230 as the heat-sealable layer 210, the barrier layer 220, Lt; / RTI >

Since the deposition thickness of the inorganic material is very thin, the inorganic-vapor deposition film 220i is formed at the edge joint portion of the vacuum insulation material as compared with the case where the aluminum thin film 220a having a thickness of 5 to 7 μm is used as the barrier layer 220 It is possible to mitigate the thermal bridging phenomenon.

The vacuum insulation material according to an embodiment of the present invention is formed by laminating an aluminum foil (aluminum foil) between the heat-sealable layer 210 and the core material 100 inside the laminate including the inorganic- The aluminum foil 400 is thermally fused together with the core material 100 and the heat-sealable layer 210 together with the aluminum foil 400.

Such an aluminum foil 400 can compensate for insufficient barrier properties of the inorganic-vapor deposition film 220i used in the sealing member, and can increase the durability and the physical properties such as air permeability due to long-term use of the vacuum insulation material.

In an embodiment of the present invention, the size of the aluminum foil 400 is smaller than the core 100. Accordingly, it is possible to minimize a thermal bridge phenomenon that may occur at the edge joint portion of the vacuum insulation.

In one embodiment of the present invention, the aluminum foil 400 is positioned between the heat-sealable layer 210 and the core material 100 and is thermally fused together with the heat-sealable layer 210. The heat- Followed by further heat treatment at a temperature of 110 to 200 DEG C for 0.1 to 30 minutes. By thermally fusing the aluminum foil, it is possible to improve the barrier property and durability of the vacuum insulation material, and to reduce the product defective rate.

The aluminum foil 400 can be usually manufactured by cold rolling, and it is preferable to use the aluminum foil 400 after heat treatment and cleaning to prevent foreign substances such as carbon from being mixed in the rolling process. The thickness of the aluminum foil is not particularly limited, and is usually within a range of thicknesses applicable to the jacket material of vacuum insulation.

The protective layer 230 serves as an outermost layer to protect the barrier layer 220 and to prevent breakage of the vacuum insulation material from external impacts or scratches. Such a protective layer may be composed of one or more layers, each of which may comprise one or more layers selected from the group consisting of nylon, polyethylene terephthalate (PET), inorganic-vapor deposited polyethylene terephthalate, oriented polypropylene (OPP), ethylene vinyl alcohol (EVOH) Polyvinyl alcohol (PVOH), inorganic-vapor-deposited polyvinyl alcohol (PVOH), ORMOCER, and inorganic-deposited OMOERER.

The inorganic material used for the deposition may be aluminum (Al), aluminum oxide (AlO _x ), silicon (Si) or silicon oxide (SiO _x ), and the deposition thickness may be 100 to 2000 Å, specifically 200 to 1000 Å, But is not limited thereto.

The thickness of the protective layer 230 may be a thickness, for example, 5 to 30 占 퐉, specifically 10 to 25 占 퐉, which is typically applied to a vacuum insulation material without particular limitation.

The barrier layer 220 serves to prevent the vacuum insulator from flowing. As the barrier layer 220, an inorganic-vapor deposition film 220i or an aluminum thin film 220a may be used, and the inorganic-vapor deposition film 220i may be formed of an inorganic-vapor-deposited polyethylene terephthalate, an inorganic vapor-deposited ethylene vinyl alcohol, Deposited polyvinyl alcohol (PVOH) and inorganic-deposited omocer (ORMOCER).

The inorganic material used for the deposition may be aluminum (Al), aluminum oxide (AlO _x ), silicon (Si) or silicon oxide (SiO _x ), and the deposition thickness may be 100 to 2000 Å, specifically 200 to 1000 Å, But is not limited thereto.

In addition, the inorganic-vapor deposition film 220i may be provided at least one depending on the cost and the desired characteristics of the final product.

The thickness of the barrier layer 220 may be a thickness, for example, 5 to 30 占 퐉, specifically 10 to 25 占 퐉, which is typically applied to a vacuum insulation material without particular limitation.

The heat-sealable layer 210 is an innermost layer, and when the sealing member is applied to a vacuum insulation material as a sheath material, it is a layer that enables thermal fusion between the sheathing materials and adheres to the core material to serve as a sealant. The material of the heat-sealable layer is not particularly limited as long as it is commonly used in vacuum insulation materials. Specifically, a linear low density polyethylene (LLPDE) film or a cast polypropylene (CPP) film may be used.

The thickness of the heat-sealable layer 210 may be a thickness, for example, 20 to 100 占 퐉, specifically 30 to 75 占 퐉, which is typically applied to a vacuum insulation material without particular limitation.

In one embodiment of the present invention, the first laminate and the second laminate constituting the sealing member may each be composed of four or more layers, and the respective interlaminar bonding in the multilayer structure may be performed using an adhesive commonly used in the art , For example, using a urethane adhesive. There is no particular limitation on the bonding method, and a method commonly used for the vacuum insulating material, for example, gravure, direct, reverse, dry lamination or the like can be used.

As the gas adsorbent 300 of vacuum insulator according to an embodiment of the present invention, CaO (calcium oxide), a metal powder, a mixture of calcium oxide and metal powder, silica gel or zeolite may be used, but the present invention is not limited thereto.

The vacuum insulation material according to one embodiment of the present invention can be produced by using the conventional vacuum insulation material manufacturing method as it is or by modifying it appropriately.

Since the vacuum insulation material according to one embodiment of the present invention has a long-term durability over 30 years, it can be used not only for a refrigerator but also as a vacuum insulation material for construction requiring high reliability. That is, the vacuum insulation material according to an embodiment of the present invention can be used as a building material for insulation construction such as a roof, a ceiling, a wall, and a floor, thereby providing high efficiency insulation performance, thereby minimizing energy consumption.

Hereinafter, the present invention will be described more specifically with reference to Examples, Comparative Examples and Experimental Examples. It should be apparent to those skilled in the art that these examples, comparative examples and experimental examples are only for illustrating the present invention, and the scope of the present invention is not limited thereto.

Manufacturing example  1: Biodegradability Core  Produce

A glass melt having a composition as shown in Table 1 below was injected into a spinner rotating at a high speed and glass fibers were formed through injection of compressed air and flame at the time when the glass was passed through the holes. The glass fibers were laminated in the form of wool from a collector and subjected to primary compression in the thickness direction through a rolling process. Then, instead of putting the organic binder into the annealing furnace, the core material was produced by pressing and molding at high temperature and high pressure.

ingredient Content (% by weight) SiO ₂ 63.77 Al ₂ O ₃ 1.77 CaO + MgO 11.12 Na ₂ O + K ₂ O 16.82 B ₂ O ₃ 6.52

Example  1 to 4

An encapsulation member composed of a pair of multilayer film laminates was prepared as shown in Table 2 below. At this time, the adhesion of each layer was carried out by the dry lamination method using a two-component urethane adhesive under the same conditions.

Subsequently, the biodegradable core material (BIO) obtained in Production Example 1 as the core material, each sealing member manufactured as described above as the casing member, and the mixture of the calcium oxide and the metal powder were used as the gas adsorbent, and the inorganic- The aluminum foil (300 mm x 300 mm x 15 m) was placed on the inner surface of the laminate and vacuum heat insulator was produced under a high vacuum of 1.0 x 10 ^-2 torr, followed by heat treatment. At this time, the heat treatment conditions of the aluminum foil are as shown in Table 2 below.

Comparative Example  1 to 4

(KCC V-PAC 2.0) was used instead of the biodegradable core material obtained in Production Example 1 as a core material, vacuum insulators were prepared in the same manner as in Examples 1 to 4.

The vacuum insulator thus produced was evaluated for the following items, and the results are shown in Table 2 below.

- Product defect rate (%): Evaluation according to occurrence of pin hole due to external impact

- initial thermal conductivity (W / mK)

- Durability (1): Thermal conductivity after leaving for 50 days at 100 ° C (= 10 years durability)

- Durability (2): Thermal conductivity after leaving 150 days at 100 ℃ (= 30 years durability)

Durability (3): Thermal conductivity (= ten year durability) after 30 days of relative humidity (RH) at 0 to 80% and at a temperature of -30 to 80 占 폚.

Durability (4): Thermal conductivity (= 30 years durability) after 80 days of relative humidity (RH) at 0 to 80% and temperature of -30 to 80 占 폚

VmPET: Aluminum-deposited polyethylene terephthalate (PET)

AlOxPET: aluminum oxide-deposited polyethylene terephthalate (PET)

Ny: Nylon

LLDPE: linear low density polyethylene

PET: Polyethylene terephthalate

Al: Aluminum

As can be seen from the above Table 2, the vacuum insulation materials of Examples 1 to 4 were less in defective product rate and superior in durability than the vacuum insulation materials of Comparative Examples 1 to 4 in which no biodegradable core material was applied.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. Do. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Accordingly, the actual scope of the invention is defined by the appended claims and their equivalents.

Claims (11)

Core material, and
And a sealing member including a pair of stacked members positioned to sandwich the core member and surround the core member,
Wherein each of the pair of stacked bodies includes a heat-sealable layer, a barrier layer, and a protective layer that are sequentially stacked on the core, and the outer peripheral portions of the pair of stacked bodies are fused to form an envelope, At least one of which comprises an inorganic-vapor-deposited film as a barrier layer,
An aluminum foil is additionally provided between the heat-sealable layer and the core material of the laminate including the inorganic-vapor-deposited film and is thermally fused,
Wherein the core comprises 61 to 66% by weight SiO ₂ , 0.1 to 2.5% by weight Al ₂ O ₃ , 4 to 8% by weight B ₂ O ₃ , 12 to 17% by weight Na ₂ O and K ₂ O, % ≪ / RTI > by weight of a glass fiber composition. The vacuum insulator according to claim 1, wherein the first laminate of the pair of laminated members constituting the sealing member comprises an inorganic-vapor-deposited film as a barrier layer, and the second laminate comprises an aluminum thin film as a barrier layer. The vacuum insulator according to claim 1, wherein the pair of stacked bodies constituting the sealing member include an inorganic-vapor-deposited film as a barrier layer. The vacuum insulation material according to claim 1, wherein the size of the aluminum foil is smaller than the core material. The vacuum insulation material according to claim 1, wherein the heat sealing of the aluminum foil is performed by further heat-treating the vacuum insulation material at a temperature of 110 to 200 ° C for 0.1 to 30 minutes. The method of claim 1, wherein the protective layer is comprised of one or more layers, wherein each layer is selected from the group consisting of nylon, polyethylene terephthalate (PET), inorganic-deposited polyethylene terephthalate, oriented polypropylene (OPP), ethylene vinyl alcohol (EVOH) , Inorganic-vapor-deposited ethylene vinyl alcohol, polyvinyl alcohol (PVOH), inorganic-deposited polyvinyl alcohol (PVOH), ORMOCER and inorganic-deposited OMOERER. The vacuum insulator according to claim 6, wherein the inorganic material is aluminum (Al), aluminum oxide (AlO _x ), silicon (Si) or silicon oxide (SiO _x ). The method of claim 1, wherein the inorganic-vapor deposited film is selected from the group consisting of inorganic-vapor deposited polyethylene terephthalate, inorganic-vapor-deposited ethylene vinyl alcohol, inorganic-vapor deposited polyvinyl alcohol (PVOH) and inorganic- More than one vacuum insulation. The vacuum insulator according to claim 8, wherein the inorganic material is aluminum (Al), aluminum oxide (AlO _x ), silicon (Si) or silicon oxide (SiO _x ). The vacuum insulation material according to claim 1, wherein the heat-sealable layer is a linear low-density polyethylene (LLPDE) film or a cast polypropylene (CPP) film. The vacuum insulator according to claim 1, wherein the vacuum insulator is for building use.

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