KR101805987B1 - Vacuum Insulation Panel And Method for Manufacturing the Same - Google Patents

Abstract

The present invention relates to a core material; And a sealing member having the core member inserted therein, wherein the sealing member has an inner side portion surrounding the core member, and a fused surface connected to the inner side portion, into which the core member is inserted, Wherein the inner portion has a non-folding edge at an edge formed along the core and the non-folding edge fuses with an adjacent non-folding edge, and wherein the inner- And a manufacturing method thereof.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vacuum insulator,

More particularly, the present invention relates to a vacuum insulation material having excellent barrier properties, durability, and impact resistance, and a method of manufacturing the vacuum insulation material.

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.

As shown in Figs. 1A and 1B, the vacuum insulator 10 generally comprises a core material 12, a sealing member 11 which is a sheathing material, and a gas And a gas adsorbent (getter) 13 for removing the components.

In order to easily insert the core member 12 into the sealing member 11, the sealing member 11 is made 1 to 80 mm larger than the core member size. Due to this difference in size, the sealing member 11 The heat-welded edge joint D1 remains as a fin. Conventionally, these fin portions are folded in a bag folding manner for the continuous installation of the vacuum insulation material.

In the case of a quadrilateral vacuum insulation material, fins are formed on four sides in total, and in the general vacuum insulation material production method, all four pins are folded in an envelope folding manner. Such a folded pin portion has a disadvantage in that it has a disadvantage in terms of heat bridging performance, and cracks are generated at each corner portion which is broken twice, resulting in a decrease in long-term durability and a high defect rate due to micro leakage and moisture permeation.

In order to solve such a problem, Korean Patent Laid-Open Publication No. 2001-0013067 discloses a structure in which only two spaced apart sides are folded as shown in FIG. 1B and an end portion thereof is fixed by a tape 14, but this is not a sufficient solution It is true.

Korean Patent Publication No. 2012-0013067

The present invention provides a vacuum insulation material having excellent barrier properties, durability and impact resistance while minimizing thermal crosslinking and improving dimensional stability and a method for producing the same.

On the other hand,

Shim Jae; And a sealing member having the core inserted therein,

The sealing member

An inner side portion surrounding the core material,

And a cover member connected to the inner side portion, the core member being inserted and having an insertion closing portion having a fused surface to be fused to cut the inserted core member from the outside,

Wherein the inner portion has a non-folding edge at an edge formed along the core and the non-folding edge fuses with an adjacent non-folding edge.

In an embodiment of the present invention, the inner side portion includes an upper surface, a lower surface, a pair of side surfaces, and a bottom surface facing the insertion closing portion, the upper surface and the lower surface being in contact with the core, And an upper fusion surface and a lower fusion surface which are mutually fused in an up-and-down direction integrally extended from the upper surface and the lower surface provided on the upper surface and the lower surface of the upper surface, The upper surface, the lower surface, and the pair of side surfaces in the insertion closing portion can be integrated so as to block the inserted core material from the outside while the lower welding surfaces of the upper and lower welding surfaces are welded to each other.

In one embodiment of the present invention, the shell material may include a fusion layer, a barrier layer, and a protective layer which are sequentially laminated to the core material.

In one embodiment of the present invention, the adjacent non-folding edges can be fused such that each fusing layer faces each other.

In an embodiment of the present invention, the upper fusion surface and the lower fusion surface may be fused such that the respective fusion layers face each other.

On the other hand,

A medial portion surrounding the core; And an insertion closing portion connected to the inner side portion and having a fused surface to which the core material is inserted and fused to cut the inserted core material from the outside,

Wherein the inner portion has a non-folding edge at an edge formed along the core and the non-folding edge fuses with an adjacent non-folding edge.

On the other hand,

A method for manufacturing a vacuum insulation material is disclosed in which the compressed core material is inserted into the sealing material as described above, the compression of the core material is released, and the sealing material is vacuum-packaged.

In one embodiment of the present invention, heat treatment may be further performed on the vacuum insulation material vacuum-packaged with the sealing member.

In one embodiment of the present invention, the heat treatment may be performed at a temperature of 120 to 150 DEG C for 8 to 15 minutes.

The vacuum insulation material according to the present invention can simultaneously secure barrier properties, durability and impact resistance while minimizing thermal crosslinking and improving dimensional stability.

1A and 1B are diagrams showing a structure of a vacuum insulator according to the prior art, wherein FIG. 1A is a perspective view showing a state before folding, and FIG. 1B is a sectional view taken along line AA of FIG. 1A in a state after folding .
2 is a perspective view and partially enlarged cross-sectional view showing the structure of a vacuum insulator according to an embodiment of the present invention.
3 is a cross-sectional view and a partially enlarged cross-sectional view taken along line AA in Fig.
4 is a cross-sectional view and a partially enlarged cross-sectional view along line BB of Fig.
Fig. 5 is a plan view of the vacuum insulator shown in Fig. 2. Fig.

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

FIG. 2 is a perspective view and a partially enlarged cross-sectional view of a vacuum insulator according to an embodiment of the present invention. FIGS. 3 and 4 are sectional views taken along line AA and BB in FIG. 2, respectively, And FIG. 5 is a plan view of the vacuum insulation material shown in FIG. 2. FIG.

Hereinafter, a vacuum insulator according to an embodiment of the present invention will be described with reference to FIGS. 2 to 5. FIG. A vacuum insulator 100 according to an embodiment of the present invention includes a core member 120, a sealing member 110 into which the core member 120 is inserted, and a gas adsorbent 110 for removing gas flowing into the sealing member 110. [ (130). The vacuum insulator 100 according to an embodiment of the present invention includes a non-folding edge as shown in a partially enlarged cross-sectional view of FIG. 2, which will be described in detail below.

3 and 4, the sealing member 110 is connected to the inner portion D0 and the inner portion D0 surrounding the core 120 and the core 120 is inserted, And a cover member (D1) having a fused surface to be fused together to shield the core member (120) from the outside, wherein the sealing member (D0) comprises the inner part (D0) The folding edge 110 has a non-folding edge E1 at an edge other than the fused surface, and the non-folding edge E1 can be fused to the adjacent non-folding edge E1. 4, the sealing member 110 includes an insertion closing portion D1 through which the core 120 is inserted and closed, and an inner portion D0 surrounding the inserted core 120. As shown in FIG. do.

The inner side D0 includes an upper surface 110a, a lower surface 110b, a pair of side surfaces 110d and a bottom surface 110c facing the insertion closing portion D1, which are in contact with the core 120 . The insertion closing portion D1 is formed integrally from the upper surface 110a and the lower surface 110b provided at the upper and lower portions of the side surface 110d and is formed as an upper fused surface 110e And the lower fused surface 110f of the lower surface 110b of the upper surface 110a and the lower fused surface 110f of the lower surface 110b are mutually fusion- The upper surface 110a, the lower surface 110b and the pair of side surfaces 110d in the insertion closing portion D1 are integrated so as to block the inserted core member 120 from the outside, The upper fusion surface 110e and the lower fusion surface 110f are formed so as to surround the core member 120 following the inner side portion D0 so as to be vacuum-packed with the sealing member 110, And the core member 120 is vacuum-packed with the sealing member 110. At this time, the side surface 110d can be folded at a portion where the upper fusion surface 110e and the lower fusion surface 110f are fusion-bonded to each other.

The outer covering material includes the upper surface 110a, the lower surface 110b, the side surface 110d, the bottom surface 110c, the upper fusion surface 110e and the lower fusion surface 110f, The fuse layer 113, the barrier layer 112, and the protective layer 111 may be sequentially stacked, as shown in FIG.

In one embodiment, the adjacent non-folding edges E1 can be fused so that the respective fusing layers 113 face each other. For example, in FIG. 3, the edge of the upper surface 110a of the sheathing member is fused with the edge of the adjacent side surface 110d. As shown in the partial enlarged cross-sectional view of FIG. 3, (113) face each other with the fused layer (113) at the edge of the adjacent side face (110d). Similarly, the portion where the upper welding surface 110e and the lower welding surface 110f of the sheath member are welded to each other is also the upper welding surface 110e and the lower welding surface 110f ) Are fused so as to face each other. The core member 120 is formed on each of the surfaces so as to relieve a separation stress applied to a portion where the non-folding edges E1 are fused and a portion where the upper fusion surface 110e and the lower fusion surface 110f are fusion- The fusing layer 113 may be thermally fused to the core 120.

The non-folding edge E1 may be formed such that the size of the envelope material has an additional width (nd) in a lateral direction and a longitudinal direction of the core material 120, This makes it possible to maintain the adhered state of the cladding material in the entire vacuum insulator 100 and further to maintain the vacuum-tight state.

In one embodiment, the width (nd) of the non-folding edge E1 may be between 5 mm and 20 mm. Specifically, as shown in FIG. 5, the size of the sealing member 110 may be greater than the core member 120 by 5 mm to 20 mm in both the lateral and longitudinal directions.

In the case of a conventional vacuum insulator, the sheath releases the product with the fin portions surrounding the core member folded (see FIGS. 1A and 1B), and thermal bridging may occur in this folded portion. In the present invention, by using the sealing member including the side surface, the edges of the sealing member, which can generate heat, are implemented in a non-folding manner, thereby preventing thermal crosslinking and improving dimensional accuracy.

In an embodiment of the present invention, the protective layer 111 of the encapsulation material protects the barrier layer 112 as an outermost layer and prevents the vacuum insulation material 100 from being damaged from external impacts or scratches. The protective layer 111 may be composed of one or more layers, and each layer may be formed of a material selected from the group consisting of nylon, polyethylene terephthalate (PET), inorganic-vapor-deposited polyethylene terephthalate, oriented polypropylene (OPP), ethylene vinyl alcohol Inorganic-vapor-deposited polyvinyl alcohol (PVOH), omocer (ORMOCER), 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.

The thickness of the protective layer 111 may be a thickness, for example, 5 to 30 mm, specifically 10 to 25 mm, which is typically applied to a vacuum insulation material without particular limitation.

The blocking layer 112 serves to prevent the vacuum insulating material from flowing. As such a barrier layer 112, an inorganic-deposited film, an aluminum thin film, or an ORMOCER may be used, and the inorganic-deposited film may be an inorganic-deposited polyethylene terephthalate, an inorganic-deposited ethylene vinyl alcohol, Alcohol (PVOH) and inorganic-deposition oleocer (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-deposited film may be provided in accordance with at least one of the cost and the desired characteristics of the final product.

The thickness of the barrier layer 112 may be a thickness, for example, 5 to 30 mm, specifically 10 to 25 mm, which is typically applied to a vacuum insulation material without particular limitation.

The fused layer 113 is the innermost layer, and when the sealing member 110 is applied to the vacuum insulating material as a sheath material, heat sealing is enabled between the sheathing material and the sealing material is in close contact with the core material 120 to serve as a sealant. The material of the fusing layer 113 is not particularly limited as long as it is ordinarily used for a vacuum insulation material. Specifically, a linear low density polyethylene (LLPDE) film or a cast polypropylene (CPP) film can be used.

The thickness of the fusing layer 113 may be a thickness, for example, 20 to 100 mm, specifically 30 to 75 mm, which is typically applied to a vacuum insulation material without particular limitation.

In one embodiment of the present invention, the envelope material may further comprise additional layers that impart specific properties as needed. Further, each interlaminar bond in the multi-layer structure can be carried out using an adhesive commonly used in the art, for example, a urethane adhesive. There is no particular limitation on the bonding method, and the vacuum insulator 100 may be of a type commonly used, for example, gravure, direct, reverse, dry lamination or the like.

Glass wool may be used as the core material 120 of the vacuum insulation material according to an embodiment of the present invention. As the gas adsorbent 130, CaO (hard lime), metal powder, mixture of calcium oxide and metal powder, silica gel or zeolite may be used However, the present invention is not limited thereto.

The vacuum insulator 110 according to an embodiment of the present invention can be manufactured by inserting the compressed core member 120 into the sealing member 110 and then releasing the compression of the core member 120, And can be manufactured by vacuum packing.

The core material 120 may be compressed by vacuum-packing the core material with a fusing film bag, or by directly pressing the core material.

Specifically, the core material is inserted into a fusing film bag, and compressed to a low vacuum of 1.0 × 10 ^-2 torr or more and 500 torr or less, or directly compressed by an external force to reduce the thickness of the core material by 30 to 80% have.

Examples of the fused film bag include high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLPDE), butene polyethylene, octene polyethylene, metallocene polyethylene, polyethylene copolymer, ionomer polymer, ethylene- Ethylene-methacrylic acid (EMAA), and the like may be used, but the present invention is not limited thereto.

The thickness of the fusing film may be a thickness typically applied to the fusing film bag, for example, 20 to 100 mm, without any particular limitation.

The vacuum insulator according to the present invention further includes side faces as compared with the conventional vacuum insulator having only the upper face and the lower face so that the compressed core can be easily inserted. In addition, by implementing the corners formed along the core material in a non-folding form, the thermal bridging phenomenon can be minimized and the dimensional stability can be improved.

In one embodiment of the present invention, the vacuum insulation material produced as described above may be further subjected to heat treatment. At this time, the heat treatment can be performed at a temperature of 120 to 150 ° C for 8 to 15 minutes.

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.

Example  One

The core material including the gas adsorbent was put into a 50 mu m-thick LLDPE (linear low density polyethylene) fused film bag and vacuum packed at 2.0 X 10 < ^-1 > torr. At this time, a mixture (5%) of zirconium, manganese, titanium, barium, iron, cobalt, aluminum, nickel and chromium powder was used as the gas adsorbent, and binderless glass wool was used as the core material .

Next, the core material vacuum-packed with the fusing film bag was inserted into the bag member composed of the inner side portion and the insertion closing portion. At this time, the configuration of each surface of the sealing member is as shown in Table 1 below.

Next, the vacuum-packed core material was released from the vacuum, and vacuum-packed at a pressure of 1.0 × 10 ^-3 with the sealing member to produce a vacuum insulation material.

Example  2

The vacuum insulation material prepared by the method of Example 1 was further subjected to heat treatment at a temperature of 140 캜 for 15 minutes to prepare a vacuum insulation material.

Example  3

The vacuum insulation material prepared by the method of Example 1 was further subjected to heat treatment at a temperature of 130 캜 for 8 minutes to produce a vacuum insulation material.

Comparative Example  One

A vacuum insulator was produced in the same manner as in Example 1, except that a sealing member composed of an upper face and a lower face was used without using a fused film bag.

The vacuum insulator thus produced was evaluated for the following items, and the results are shown in Table 1 below.

- Initial heat transfer rate (mW / m ² K)

- initial thermal conductivity (mW / 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): RH 0 ~ 80%, -30 ~ 80 ℃, Thermal Conductivity after 30 days (= 10 years durability)

- Durability (4): RH 0 to 80%, -30 to 80 ° C, thermal conductivity after 30 days (= 30 years durability)

Example 1 Example 2 Example 3 Comparative Example 1 Upper and lower
Surface and upper and lower fused surfaces Protective layer
(Outermost layer) VmPET (占 퐉) 12 12 12 12 Protective layer VmPET (占 퐉) 12 12 12 12 Barrier layer VmPET (占 퐉) 12 12 12 12 Fusion layer
(Innermost layer) LLDPE (占 퐉) 50 50 50 50 Side and bottom side Protective layer
(Outermost layer) Ny (占 퐉) 15 15 - - Inorganic-deposited PET (㎛) - - 12 Protective layer Ny (占 퐉) 25 25 - - Inorganic-deposited PET (㎛) - - 12 Barrier layer Al (탆) 7 7 - - Inorganic-deposited PET (㎛) - - 12 Fusion layer
(Innermost layer) LLDPE (占 퐉) 50 50 50 - Folding Applicability X X X O Heat treatment Temperature (℃) - 140 130 - Time (minutes) - 15 8 - Sample size Width X Length X Height (mm)
(290 x 410 x 12) 291 X 422 X 12.4 292 X 423 X 12.1 292 X 423 X 12.3 295 X 426 X 13.6 Initial heat transfer rate (mW / m ² K) 1.53 1.57 1.49 1.69 Initial thermal conductivity (mW / mK) 1.72 1.70 1.71 1.80 Vacuum Insulation Durability (1)
(100 ℃, left for 50 days) = 10 years Endurance performance 2.84 2.99 3.03 3.11 Vacuum Insulation Durability (2)
(100 ℃, 150 days left) = 30 years Durability performance 3.52 3.63 3.75 3.79 Vacuum Insulation Durability (3)
(RH 0 ~ 80%, -30 ~ 80 ℃, left for 30 days) = 10 years endurance performance 2.93 3.17 3.22 3.28 Vacuum Insulation Durability (4)
(RH 0 ~ 80%, -30 ~ 80 ℃, 80 days left) = 30 years Endurance performance 4.91 4.97 4.93 4.95

VmPET: Aluminum-deposited polyethylene terephthalate (PET)

Ny: Nylon

Al: Aluminum

LLDPE: linear low density polyethylene

As can be seen from Table 1, the vacuum insulation materials of Examples 1 to 3 according to the present invention exhibited excellent initial heat conduction, thermal conductivity and dimensional stability over the vacuum insulation material of Comparative Example 1 according to the prior art.

In addition, the vacuum insulation materials of Examples 1 to 3 exhibited durability equivalent to that of the vacuum insulation material of Comparative Example 1.

As a result, the vacuum insulation material according to the present invention further includes side surfaces as compared with the conventional vacuum insulation material to form fusion between the non-folding edges, thereby minimizing thermal bridging and improving dimensional stability while improving barrier properties, durability and impact resistance Can be secured at the same time.

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 (16)

Shim Jae; And a sealing member having the core inserted therein,
The sealing member
An inner side portion surrounding the core material,
And a cover member connected to the inner side portion, the core member being inserted and having an insertion closing portion having a fused surface to be fused to cut the inserted core member from the outside,
Wherein the inner portion has a non-folding edge at an edge formed along the core and the non-folding edge fuses with an adjacent non-folding edge. 2. The medical instrument according to claim 1, wherein the medial portion includes an upper surface, a lower surface, a pair of side surfaces, and a bottom surface facing the insertion closure,
Wherein the insertion closing portion includes an upper fused surface and a lower fused surface which are mutually fused in a vertical direction formed integrally and extending from the upper surface and the lower surface provided on the upper and lower sides of the side surface,
The upper face, the lower face, and the lower face of the insertion closing portion are arranged so that the side faces are folded and the upper fusion face of the upper face and the lower fusion face of the lower face mutually fusion- Vacuum insulation where the sides of the pair are integrated. The vacuum insulator according to claim 2, wherein the sheathing material comprises a fusion layer, a barrier layer, and a protective layer which are sequentially laminated to the core material. The vacuum insulator according to claim 3, wherein the adjacent non-folding edges are fused such that respective fusing layers face each other. The vacuum insulator according to claim 3, wherein the upper fusion surface and the lower fusion surface are fused so that the respective fusion layers face each other. The method of claim 3, 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-vapor 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 ). 4. The vacuum insulator of claim 3, wherein the barrier layer is an inorganic-deposited film, an aluminum foil or an ORMOCER. 9. The method of claim 8, 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 9, 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 3, wherein the fusing layer is a linear low density polyethylene (LLPDE) film or a cast polypropylene (CPP) film. A medial portion surrounding the core; And an insertion closing portion connected to the inner side portion and having a fused surface to which the core material is inserted and fused to cut the inserted core material from the outside,
Wherein the inner portion has a non-folding edge at an edge formed along the core, and the non-folding edge fuses with an adjacent non-folding edge. Compressing the core material after inserting the compressed core material into the bag material according to claim 12, and vacuum-packing the bag material. 14. The manufacturing method according to claim 13, wherein the core material is compressed by vacuum-packing the core material with a fusing film bag, or pressing the core material directly. The manufacturing method according to claim 13, further comprising the step of heat-treating the vacuum insulation material vacuum-packaged with the sealing member. 16. The method according to claim 15, wherein the heat treatment is performed at a temperature of 120 to 150 DEG C for 8 to 15 minutes.

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