KR20110077860A - Vacuum Insulator and Method of Manufacturing the Same - Google Patents

Abstract

The present invention relates to a vacuum insulator and a method of manufacturing the same. In this invention, a vacuum heat insulating material can be manufactured using a stick type getter material, and the vacuum heat insulating material formed in the outer surface can be provided uniformly. Moreover, in this invention, the installation efficiency of a getter material can be raised at the time of manufacture of a vacuum heat insulating material, and the fall of the thermal performance of a product can be prevented. Moreover, in this invention, when apply | coating a vacuum heat insulating material to home appliances, an electronic product, a building material, etc., the ease of operation | work, such as a glue process, on the surface can also be improved.

Description

Vacuum insulation material and preparation method

The present invention relates to a vacuum insulator and a method of manufacturing the same.

The vacuum insulator includes a core material, a getter material which adsorbs moisture or gas in the core material, and an envelope surrounding the core, and the inside of the envelope is formed in a vacuum or reduced pressure state.

In general, a vacuum insulator including a getter material is a method of enclosing a pouch type getter material envelope between inner core materials and enclosing it with an outer material or surrounding the outer material with the getter material placed on the core surface. Is being manufactured.

In the conventional method as described above, when the core material and the getter material are sealed with the shell material and the air in the shell material is sucked in, the core material and the shell material are shrunk, which causes a phenomenon in which the part where the getter material is inserted is protruded.

As such, the protruding portion of the getter material causes a thickness variation of the outer surface of the vacuum insulator, and thus, when the vacuum insulator is applied to a building and a home appliance, the problem of surface leveling and the like deteriorates.

In order to solve such a problem, in recent years, after processing a groove on the surface of the core material, a getter material is placed in the groove and coated with an outer shell material to manufacture a vacuum insulator.

However, even in such a method, the problem of protrusion formation cannot be completely solved, and there is also a problem that thermal performance is deteriorated at the cut portion of the core through groove processing.

An object of the present invention is to provide a vacuum insulator and a manufacturing method thereof.

The present invention as a means for solving the above problems, the core portion comprising a core material and a gettering material (gettering material); And a shell material covering the core part, wherein the getter material is a stick type getter material, wherein the getter material is a stick type getter material.

The present invention is another means for solving the above problems, the first step of packaging the core portion including the core material and the stick-type getter material with an outer shell material; And

It provides a method for producing a vacuum insulator comprising a second step of reducing the core portion wrapped with the shell material.

In this invention, a vacuum heat insulating material can be manufactured using a stick type getter material, and the vacuum heat insulating material formed in the outer surface can be provided uniformly. Moreover, in this invention, the installation efficiency of a getter material can be raised at the time of manufacture of a vacuum heat insulating material, and the fall of the thermal performance of a product can be prevented. Moreover, in this invention, when apply | coating a vacuum heat insulating material to home appliances, an electronic product, a building material, etc., the ease of operation | work, such as a glue process, on the surface can also be improved.

The present invention core portion including a core material and a getter material; And an outer cover material covering the core portion, wherein the core portion is formed under reduced pressure.

The getter material relates to a vacuum insulator, which is a stick type getter material.

Hereinafter, the vacuum heat insulating material of this invention is demonstrated in detail.

In the vacuum insulator of the present invention, the core part including the core material and the getter material is covered by the outer cover material, and the core part, that is, the inside of the outer cover material may be formed under a reduced pressure or a vacuum state.

In the present invention, the core is formed inside the core portion, and the material constituting the core is not particularly limited. That is, in the present invention, all materials commonly used in the field of manufacturing vacuum insulation may be used. Generally, the kind of core material used for a vacuum heat insulating material is an inorganic or organic material with low thermal conductivity and little gas generation, and most of the above general materials can be used in this invention. Examples of the core material that can be used in the present invention include one or more selected from the group consisting of polyurethane, polyester, glass fiber, polypropylene, polyethylene, and the like. Such materials can be used as cores in fibers, foams or other forms (eg glass wool).

In the present invention, the shape and size (ex. Thickness) of the core material as described above are not particularly limited, and may be appropriately changed depending on the application to which the vacuum insulator is applied.

In the present invention, as a gettering material included in the core part and absorbing moisture or gas in the core part, a component commonly used in the vacuum insulation material field may be used. In the present invention, for example, a silica gel, zeolite, activated carbon, zirconium compound, barium compound, lithium compound, magnesium compound (ex. MgO), calcium compound (ex. ) And a mixture of one or more kinds of quicklime and the like can be used.

In the present invention, the shape of the getter material as described above is characterized by a stick shape. In this way, the getter material is formed into a stick shape, and as will be described later, the getter material is inserted into the core material, or the getter material formed into a thin rectangular shape whose cross section is the same as the thickness of the core material on the side surface of the core material. By arrange | positioning, even if the core part is formed in pressure reduction state, it can have a uniform thickness and can manufacture the vacuum heat insulating material which the flatness was ensured. As a result, in the present invention, it is possible to provide a vacuum insulator having a beautiful appearance without protruding portions or the like on the surface, and it is not necessary to provide a groove or the like for the getter material on the surface of the core material, thereby reducing the thermal performance of the vacuum insulator. It can prevent. In addition, since the flatness of the vacuum insulator is ensured, the ease of operation such as glue treatment can also be improved when applied to home appliances, electronic products, or building applications.

The method for producing the getter material in the form of a stick in the present invention is not particularly limited. For example, the getter material may be manufactured using a mold or the like, or through a press, extrusion or injection process.

In the present invention, the specific shape of the stick getter material is not particularly limited as long as it is manufactured in a stick shape, for example, the shape of the cross section is circular, elliptical, polygonal (ex. Rectangular or square, etc.) or amorphous. The rod may be formed.

In the present invention, the length of the getter material formed in the stick shape as described above may be adjusted in a range not exceeding the width of the core material used. The getter agent of the present invention may be in the range of (L-20) mm to L mm, for example, when the insertion direction length of the core material is L. In the present invention, the insertion direction length means the length of the core material in the direction in which the stick getter agent is inserted. When the length of the getter material exceeds L mm, even when the getter material is inserted into the core material or disposed on the side surface thereof, the getter material may protrude to the outside of the heat insulating material, resulting in appearance. Moreover, when the length of a getter material is less than (L-20) mm, there exists a possibility that the adsorption performance by a getter material may fall.

In the present invention, the area of the cross section of the stick type getter material is also not particularly limited, and may be determined in consideration of the size of the core material used. In the present invention, the area of the cross section of the getter material as described above may be, for example, 1 mm ² to 10 mm ² . When the average area of the cross section of the getter material exceeds 10 mm ² , even when the getter material is inserted into the core material or disposed on the side surface thereof, there is a possibility that the outside of the heat insulating material protrudes and the appearance becomes. In addition, the average area of the cross section of the getter material is 1 mm ^2. If less than this, the adsorption performance by the getter material may be deteriorated.

In the present invention, the position in the core portion of the stick type getter material is not particularly limited, provided that the flatness of the vacuum insulator is secured, but it is preferable to position the stick type getter material on the side of the core material. As such, by placing the getter material on the side surface of the core material rather than the surface or the rear surface of the core material, it is possible to minimize the area where the getter material and the core material contact each other, thereby reducing the thermal performance of the vacuum insulator.

In the present invention, for example, the stick-type getter material may be directly inserted at an appropriate position of the side surface of the core material or disposed in contact with the side surface of the core material. By arranging the stick type getter material on the side surface of the core material, the area where the getter material comes into contact with the core material can be reduced to prevent deterioration of the thermal insulation performance. Can be prevented.

1 to 3 are exemplarily showing a shape in which the stick type getter material is disposed in the present invention.

In the present invention, for example, as shown in FIG. 1, a vacuum insulator 100 including a core part 110 including a core material 120 and an outer cover material 140 covering the core part 110. ), The stick-type getter material 130 may have a structure directly inserted into the core material (120). Such a structure can be employed when the core material is made of a material having high porosity, such as bulky glass wool. In this case, the stick getter material 130 is a rod-shaped cross-section is formed in a circular shape, the insertion position may be located in the central portion in the thickness direction from the side portion of the core material. As described above, by arranging the core member 130, the vacuum insulator 100 can have more excellent flatness. In addition, by positioning the getter material by direct insertion instead of the grooves formed by processing such as cutting, the core part portion into which the stick-type getter material is inserted is pressed, thereby preventing deterioration of the thermal insulation performance. The surface area contacted by the getter material can also be reduced.

In the present invention, as shown in FIG. 2, a press groove may be formed in a predetermined portion of the cores 120a and 120b, and the getter material 130 may be inserted into the press groove. As used herein, the term indentation groove means a groove formed by a method such as pressing, compression, or crimping (hereinafter, collectively referred to as indentation processing), rather than a method of cutting a core material such as a cutting process. . When the groove is formed through the indentation process as described above, the density of the core material is increased around the part where the getter material is inserted, thereby preventing the deterioration of the thermal insulation performance, and in some cases, the thermal insulation performance can be further improved. . In this case, the press-fit groove may be formed in the same shape as the cross-sectional shape of the stick-type getter material 130, and the position may be formed at the central portion in the thickness direction at the side portion of the core material 120.

In addition, in FIG. 2, although the case where two core materials 120a and 120b are used, embodiment of this invention is not necessarily limited to this, If necessary, the said groove | channel is processed to a single core material, and a stick is performed. You can also insert a getter material.

In the present invention, as shown in FIG. 3, the getter material 130 may be formed to contact the side surface of the core material 120 without being inserted into the core material 120. Thus, by making a getter material contact with the side surface which is not the surface or back surface of a core material, a contact area can be reduced and a fall of heat insulation performance can be prevented. In the above case, the shape of the stick getter material 130 may be formed by a thin plate-shaped bar having a rectangular cross section, and the length of the rectangular cross section shown in FIG. 3 in the cross section is equal to the height of the core material 120. Can be formed.

In the present invention, the outer cover material covers the core and serves to maintain the inside of the core under reduced pressure or vacuum.

The kind of outer cover material that can be used in the present invention is not particularly limited, and materials commonly used in the field of manufacturing vacuum insulation materials can be used. The envelope material used in the present invention includes, for example, a sealing layer 140a surrounding the core portion, as shown in FIG. 4; A barrier layer 140b surrounding the sealing layer 140a; And a protective layer 140c surrounding the barrier layer 140b.

The sealing layer of the present invention covers the core portion and is in close contact with the core portion to maintain the panel form. The material of the sealing layer which can be used in the present invention is not particularly limited, and for example, polyolefin resin films such as polypropylene films, high density polyethylene films or linear low density polyethylene films, polyacrylonitrile films, polyethylene terephthalate films, Or one or more selected from the group consisting of ethylene-vinyl alcohol copolymer films and the like. In the present invention, the thickness of the sealing layer is not particularly limited and can be appropriately adjusted within a conventional range.

The barrier layer of the present invention may surround the sealing layer, maintain the degree of vacuum inside, and serve to block external gas and water vapor. In the present invention, the material of the barrier layer is not particularly limited, and a laminated film (deposited film film) or the like on which metal is deposited on a metal foil or a resin film may be used. The metal may be aluminum, copper, stainless steel, iron, or the like, but is not limited thereto. In addition, the deposited film may be formed by depositing a metal such as aluminum, stainless steel, cobalt or nickel, silica, alumina, or carbon by a deposition method or a sputtering method, and the resin film serving as a substrate. As the general resin film used in the art can be used. In the present invention, the thickness of the barrier layer is not particularly limited and may be adjusted and used within a conventional range.

The protective layer of the present invention surrounds the barrier layer and may serve to primarily protect the vacuum insulator from external impact. In the present invention, the kind of the protective layer is not particularly limited, and examples thereof include polyester resins such as polyethylene terephthalate and polybutylene terephthalate; Polyvinyl chloride resins such as polyolefin resins such as polyethylene or polypropylene, polyvinyl chloride and vinyl chloride copolymers; Polyamide resins such as nylon, methaxylenediamine, and adipanic acid condensate; Polyvinyl alcohol; Films containing one or more selected from styrene resins such as acrylonitrile-butadiene-styrene copolymers and acrylonitrile-styrene copolymers can be used. In the present invention, the thickness of the protective layer is also not particularly limited, and may be appropriately adjusted and used within a conventional range.

In the present invention, a method of manufacturing the vacuum insulator as described above is not particularly limited. In the present invention, for example, the first step of covering the core portion including the core material and the stick-type getter material with an outer shell material; And

It can be produced by a method comprising a second step of depressurizing the core portion coated with the shell material.

The first step of the present invention is a step of coating the core part with an outer shell material, and the coating method is not particularly limited. For example, the core part may be packaged in an envelope of the envelope, and the opening may be fused, or the core may be packaged by heating and pressing the edges by placing the envelope on the upper and lower portions of the core.

The core part covered with the outer shell material in the first step includes a core material and a stick type getter material. In this case, the core material, the shape or material of the getter material is as described above.

The core material applied in the first step of the present invention is produced by directly inserting a stick-type getter material in a predetermined portion of the core material, for example, from the side portion to the center in the thickness direction, or (1) a press-in groove in the side portion of the core material. Forming a; And (2) inserting the getter material into the indentation groove formed in step (1).

In the present invention, the method of forming the groove in the core material is not particularly limited, but as described above, it is preferable to form through the indentation process. In this case, for example, the core material may be directly press-indented, or the two cores may be press-fitted into a desired shape, and the pressed shapes may be laminated to face each other. have. As described above, by forming the grooves by indentation instead of cutting, problems of thermal performance deterioration that may occur in the vacuum insulator can be solved.

The core material applied in the first step of the present invention can also be manufactured through the step of disposing a stick-type getter material on the side of the core material. In this case, the arrangement of the stick-type getter material can be, for example, a shape as shown in FIG. 3.

The second step of the present invention is a step of depressurizing the core part coated with the shell material, in which case the depressurization method is not particularly limited. In the present invention, for example, an opening is formed in a predetermined portion of the outer cover material, the inside of the opening is decompressed through the opening by a conventional means such as a vacuum pump, and then the opening is sealed by a method such as heat fusion again to form the second opening. The steps can be performed.

In the above, the degree of pressure reduction of the core part is not particularly limited, and the pressure reduction or vacuumization may be performed within a range generally applied in the vacuum insulation field.

1 shows a vacuum insulator according to an example of the present invention.

2 shows a vacuum insulator according to another example of the present invention.

3 shows a vacuum insulator according to another embodiment of the present invention.

4 shows the shell material configuration of the vacuum insulator.

≪ Description of reference numerals &

100: vacuum insulator 110: core portion

120: heart material 130: getter material

140: shell material 140a; Sealing layer

140b: barrier layer 140c: protective layer

Claims (13)

A core part including a core material and a getter material; And an outer cover material covering the core portion, wherein the core portion is formed under reduced pressure. The getter material is a vacuum insulator, characterized in that the stick-type getter material. The vacuum insulator of claim 1, wherein the core material comprises at least one selected from the group consisting of glass fibers, polyurethanes, polyesters, polypropylenes, and polyethylenes. The vacuum insulator of claim 1, wherein the getter material comprises at least one selected from the group consisting of silica gel, zeolite, activated carbon, zirconium, barium compound, lithium compound, magnesium compound, calcium compound, and quicklime. The vacuum insulator of claim 1, wherein the stick-shaped getter material has a circular, elliptical, polygonal, or amorphous cross section. The vacuum insulator of claim 1, wherein the getter material is inserted into the core material at the core material side portion. The vacuum insulator according to claim 1, wherein a press-fitting groove is formed in the side surface of the core material, and a stick getter material is inserted into the press-fitting groove. The vacuum insulator of claim 1, wherein the getter material is in contact with the core material at the side surface of the core material. The vacuum insulator according to claim 1, wherein the length of the stick-type getter material is (L-20) mm to L when the insertion direction length of the core material is L. The vacuum insulator according to claim 1, wherein the stick type getter material has an average area of 1 mm ² to 10 mm ² in cross section. According to claim 1, wherein the shell material comprises a sealing layer surrounding the core portion; A barrier layer surrounding the sealing layer; And a protective layer surrounding the barrier layer. A first step of packaging a core part including a core material and a stick type getter material with an outer shell material; And a second step of depressurizing the core part packed with the shell material. 12. The method of claim 11, wherein the first step comprises: (1) forming a press-in groove in the core side surface portion; And (2) A method of manufacturing a vacuum insulator comprising the step of inserting a getter material into the indentation groove formed in step (1). 12. The method of claim 11, wherein the first step includes disposing a stick getter material on the side of the core material.

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