KR101441182B1 - Core material using a long glass fiber, method for fabricating the same and vacuum insulation panel using the same - Google Patents

Abstract

The present invention relates to a core material using a single fiber so as to maximize heat insulation performance of a vacuum insulation material by forming a core of a thin film by horizontally arranging the long fibers and forming a plurality of the core materials by lamination, To a vacuum insulation material.
According to the present invention, there is provided a method of manufacturing a core material for a vacuum insulation material used as a home appliance and a building material, the method comprising the steps of: forming glass fibers to a predetermined length; And arranging the glass fibers horizontally and then shaping the glass fibers into a board shape.
A vacuum insulator used as a household electric appliance and a building material, comprising a glass fiber board (111) having a thin film of glass fibers having an average length of 1000 to 5000 mu m and a diameter of 1 to 7 mu m horizontally arranged, 111) are laminated in a plurality of layers; And a cover material 120 for vacuum-packing the core material 110. [

Description

TECHNICAL FIELD [0001] The present invention relates to a core material using long fibers, a method of manufacturing the core material, and a vacuum insulation material using the core material.

The present invention relates to a vacuum insulation material, and more particularly, to a core material using long fibers capable of maximizing the heat insulation performance of a vacuum insulation material, a manufacturing method thereof, and a vacuum insulation material using the core material.

In general, a vacuum insulation panel (V-Panel) is composed of a shell material having a low gas permeability and a core material provided with a vacuum state. Such a vacuum insulation material has a very excellent heat shielding effect and can be used as a conventional insulation material such as polyurethane or styrofoam It is a high-tech material whose demand for insulation is increasing more than 8 times higher than that of insulation.

These vacuum insulation materials can be used not only in refrigerators, but also in industrial applications such as building walls, doors, etc. for construction, refrigeration vehicles, and vending machines. In particular, when vacuum insulation for refrigerators is applied to four sides of a refrigerator in which energy efficiency improvement is emphasized, the cooling efficiency can be improved and power consumption can be reduced by 20%. In addition, since the outer wall of the refrigerator can be designed thinly, the volume ratio can be improved by about 30%.

Such a vacuum insulation material has a cover material composed of a gas barrier film which has voids formed therein by porosity (80% or more) and maintains the vacuum state of the space, a porous material accommodated in the space of the encapsulating material and forming a vacuum space And a getter for adsorbing gas and moisture.

The cover material may be composed of a multilayer polymer and a film laminated with aluminum. The core material may be glass fiber or silica core having a desired hardness and desired size through a pretreatment process. It is a kind of intake and desorptive agent for absorbing gas and moisture remaining in the inside of the shell or newly entering.

However, in the conventional vacuum insulation material, the core material made of glass fibers undergoes a needling or thermal compression process, which is difficult to manufacture, and the initial performance deteriorates as the glass fibers are arranged alternately such as vertical, horizontal, and inclined.

The present invention has been conceived in order to solve the above-mentioned problems, and it is an object of the present invention to provide a method for forming a core of a thin film by horizontally arranging long fibers, And a method of manufacturing the same, and a vacuum insulation material using the core material.

The method for manufacturing a core material using long fibers according to the present invention for realizing the above object is a method for manufacturing a core material for a vacuum insulation material used as a home appliance and a building material, And arranging the glass fibers horizontally and then shaping the glass fibers into a board shape.

In this case, the glass fiber is a long fiber having an average length of 1000 to 5000 m.

The glass fiber has a diameter of 1 to 7 mu m.

The glass fiber may further include at least one of organic microfine fibers, fumed silica powder, silica powder, pearlite powder, and airgel powder.

Further, the glass fiber is characterized by being formed by any one of a wet-making method, a thermo-compression bonding method, an inorganic binder bonding method, and a needling method.

In addition, the wet manufacturing method includes the steps of filling a tank with a constant water and mixing the water with a binder to form an adhesive solution; Stirring the glass fibers so that the glass fibers are adhered; Passing the adhesive glass fiber between at least a pair of rollers to form a sheet or a board in a compressed state and removing moisture; Introducing the moisture-removed glass fiber into a dryer through a mesh belt and drying the glass fiber; And cutting the dried glass fiber into a predetermined size.

And 1 to 20 parts by weight of a binder is added and stirred with respect to 100 parts by weight of the above constant.

The binder may be any one of acrylic resin, PVA, urethane resin, epoxy resin, phenol resin, and polyamide resin.

The moisture removal and drying step of the glass fiber is performed in a vacuum chamber equipped with a forced exhaust system.

The thermocompression bonding is performed at a temperature of 400 to 1000 캜.

The thermocompression bonding method is characterized by using a plate press or a belt press.

The core material using the long fibers according to the present invention is characterized in that it is produced according to any one of the above production methods.

A vacuum insulating material used as a household electrical appliance and a building material includes a glass fiber board having a thin film of glass fibers having an average length of 1000 to 5000 mu m and a diameter of 1 to 7 mu m horizontally arranged, Core material; And a jacket material for vacuum-packing the core material.

In this case, the glass fiber board is stacked at least two or more times.

The glass fiber board is characterized in that both sides of the glass fiber board are laminated in a step or concavo-convex shape so that both side portions of the glass fiber board overlap each other.

Further, the glass fiber board is characterized in that it is laminated via an adhesive.

According to the present invention, it is possible to maximize the heat insulation performance of the vacuum insulation material by forming the core material of the thin film by horizontally arranging the glass fibers of a predetermined length and by laminating a plurality of the core materials .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an internal construction view of a vacuum insulator according to the present invention;
FIG. 2 is a detailed view of the portion 'A' of FIG. 1,
FIG. 3 is a photograph showing a core material in which glass fibers are arranged horizontally according to the present invention,
4 is a side sectional view showing various laminated shapes of the core material according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the drawings, the same reference numerals as in the drawings denote the same elements in the drawings, unless they are indicated on other drawings.

FIG. 2 is a detailed view of a portion 'A' of FIG. 1, and FIG. 3 is a photograph showing a core material in which glass fibers according to the present invention are horizontally arranged. FIG. And Figure 4 is a side cross-sectional view showing various laminate shapes of the core material according to the present invention.

1 to 3, a vacuum insulator 100 according to a preferred embodiment of the present invention, which is used as a household appliance and a building material, comprises a thin glass fiber board 111 formed by horizontally arranging glass fibers A core member 110 formed by laminating a plurality of glass fiber boards 111 and a cover member 120 for vacuum packing the core member 110. [

The configuration of the present invention will be described in detail as follows.

The core member 110 forms glass fibers in a predetermined length, while the glass fibers are horizontally arranged and then formed into a glass fiber board 111.

In this case, the glass fibers may have an average diameter of 1 to 7 mu m. That is, when the diameter of the glass fiber is less than 1 占 퐉, the porosity of the core 110 formed by the wet production method becomes too small and the heat insulating performance deteriorates. On the other hand, when the average diameter of the glass fiber exceeds 7 탆, there is a concern that the long-term durability may be deteriorated because the pore size becomes large.

In addition, the glass fibers may be formed of long fibers having a length of at least 1000 탆, preferably 3000 to 5000 탆 (as measured by dynamic image analysis). That is, when the glass fiber is formed to have a length within the range of 3000 to 5000 탆, the horizontal alignment of the glass fibers is optimized, and the effect of improving the thermal conductivity is enhanced, thereby improving the heat insulation performance of the vacuum insulation.

In other words, when the glass fibers are formed to a length of 1000 탆 or less, the glass fibers constituting the core material are arranged in a staggered manner such as vertical, horizontal, and inclined. On the other hand, when the glass fibers are formed to a length of 5000 mu m or more, it is difficult to arrange the glass fibers horizontally and to carry out the molding process.

The glass fiber may further include at least one of organic ultrafine fibers, fumed silica powder, silica powder, pearlite powder, and airgel powder so as to enhance long-term durability.

The glass fiber may be made of a core material 110 by any one of a wet process, a wet pressing process, a thermocompression process, an inorganic binder bonding process, and a needling process.

A description will be given of the wet manufacturing method among the above-mentioned manufacturing methods. First, a tank is filled with a constant, and a binder is mixed with this constant to form an adhesive solution. Then, the glass fibers are put into the solution and stirred so that the glass fibers are adhered.

Then, the adhered glass fiber is passed between at least one pair of rollers to form a sheet or a board, and moisture is removed. Then, the moisture-free glass fiber is put into a dryer through a mesh belt and dried . In this case, the temperature of the dryer is preferably about 300 캜.

Preferably, the moisture removal and drying step of the glass fiber is performed in a vacuum chamber equipped with a forced exhaust system.

When the drying process is completed, the dried glass fibers are cut to a predetermined size and then laminated to form a plurality of the core fibers 110 according to the present invention.

In this case, the binder is preferably added and stirred in an amount of 1 to 20 parts by weight based on 100 parts by weight of the constant.

The binder may be selected from the group consisting of an acrylic resin, a PVA, a urethane resin, an epoxy resin, a phenol resin, and a polyamide.

According to another manufacturing method, the core member 110 can be manufactured through a thermocompression bonding process in which glass fibers bonded by a binder are pressed and formed into a predetermined shape through predetermined thermocompression bonding, and the binder is heated and removed have.

In this case, the binder for binding the glass fibers may be composed of at least one of soluble sodium silicate, alumina sol, silica sol, and aluminum phosphate.

In order to manufacture the glass fiber board 111, the thermocompression process for heating and removing the binder contained in the glass fiber at a high temperature is preferably performed at a temperature of 400 to 1000 ° C. That is, when the thermocompression bonding process is performed at a temperature of less than 400 ° C, it is difficult to efficiently remove the binder, and the glass fiber structure is not properly deformed, resulting in poor compression efficiency. On the other hand, when the heating temperature is higher than 1000 ° C, the manufacturing cost of the core material 110 is excessively increased.

The thermocompression bonding process may be performed using a plate press or a belt press.

At least two or more glass fiber boards 111 formed by such a process may be stacked to form the core material 110. Preferably, the plurality of glass fiber boards 111 may be laminated via an adhesive.

The cover material 120 serves to vacuum-package the core material 110 manufactured through the above-described process. Preferably, such a cover material 120 has a laminated structure of an adhesive layer 121, a metal barrier layer 123, and a surface protective layer 125 from the inside to the outside.

More specifically, the adhesive layer 121 is a layer which is heat-welded by heat sealing, and serves to maintain a vacuum state. The adhesive layer 121 may be formed of a material such as high density polyethylene (HDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), unoriented polypropylene (CPP), stretched polypropylene (OPP), polyvinylidene chloride Vinyl chloride (PVC), ethylene-vinyl acetate copolymer (EVA), and ethylene-vinyl alcohol copolymer (EVOH). The adhesive layer 121 is preferably formed to a thickness of 1 to 100 탆 so as to provide a sufficient sealing property.

A metal barrier layer 123 is formed on the adhesive layer 121 to protect the core 110 and the gas barrier. Preferably, the metal barrier layer 123 may be formed to a thickness of 6 to 7 탆, and may be made of aluminum foil.

In addition, a surface protective layer 125 is stacked on the metal barrier layer 123. The surface protective layer 125 serves to prevent cracks from occurring when the metal barrier layer 123 made of a metal is folded. The surface protection layer 125 may be formed of polyethylene terephthalate (PET) having a thickness of 10 to 14 μm and nylon having a thickness of 20 to 30 μm.

Meanwhile, as shown in FIG. 4, the glass fiber boards 111 constituting the vacuum insulating material 100 may be stacked at least two or more times, and both sides may be stacked in a stepped or concave shape. That is, since the glass fiber boards 111 are stacked so that both sides of the glass fiber boards 111 are overlapped with each other, the vacuum insulation panels 100 can be installed in succession in accordance with the area of the object to be installed, .

In this case, the joint of the glass fiber board 111 can be firmly coupled through an adhesive.

<Experiment and evaluation of insulation performance>

We will try to test the insulation performance according to the length of glass fiber under the condition shown in the following table.

First, two types of thin glass fiber glass boards are manufactured using glass fibers different in length such as 1048 탆 and 3012 탆, respectively, and then laminated in 12 layers. Then, each of the glass fiber boards was heated in an environment of the same temperature for a predetermined time, and the thermal conductivity at that time was checked. As a result, the following results were obtained.

Twelve glass fiber boards (1.0m) Twelve glass fiber boards (1.0m) Glass fiber length (탆) 1048 3012 Thermal conductivity (mW / mk) 2.86 2.40

In the case of the glass fiber board manufactured by forming the length of the glass fiber to 1048 탆, the thermal conductivity is 2.86 mW / mk, whereas the glass fiber board formed by forming the glass fiber length of 3012 탆 has the thermal conductivity of 2.40 mW / mk Respectively.

In other words, it was confirmed that the sample with longer glass fiber length improved the insulation performance by 16% or more when compared with the sample without glass fiber length.

100: vacuum insulation material 110: core material
111: glass fiber board 120: sheath material

Claims (16)

A method of manufacturing a core material for a vacuum insulation material used as a home appliance and a building material,
Forming a glass fiber with a predetermined length; And
And arranging the glass fibers horizontally and then shaping the glass fibers into a board shape,
The glass fiber is formed by any one of a wet process method, a thermo compression process, an inorganic binder bonding method, and a needling method,
In the wet production method,
Adding a constant to the tank, mixing the constant with the binder to form an adhesive solution;
Stirring the glass fibers so that the glass fibers are adhered;
Passing the adhesive glass fiber between at least a pair of rollers to form a sheet or a board in a compressed state and removing moisture;
Introducing the moisture-removed glass fiber into a dryer through a mesh belt and drying the glass fiber; And
And cutting the dried glass fiber into a predetermined size. The method according to claim 1,
The glass fiber may be,
And the average length is 1000 to 5000 占 퐉. The method according to claim 1,
The glass fiber may be,
And having a diameter of 1 to 7 占 퐉. The method according to claim 1,
The glass fiber may be,
Wherein the core material comprises at least one of organic microfine fibers, fumed silica powder, silica powder, pearlite powder, and airgel powder. delete delete The method according to claim 1,
And 1 to 20 parts by weight of a binder is added and stirred with respect to 100 parts by weight of the above constant. The method according to claim 1,
Wherein the binder comprises:
Acrylic resin system, PVA system, urethane resin system, epoxy resin system, phenol resin system, and polyamide system. The method according to claim 1,
The step of removing moisture and drying the glass fiber comprises:
Wherein the core material is formed in a vacuum chamber provided with a forced exhaust system. The method according to claim 1,
In the thermocompression bonding method,
Characterized in that the core material is carried out at a temperature of 400 to 1000 占 폚. The method according to claim 1,
In the thermocompression bonding method,
A method for manufacturing a core material using a long fiber, characterized by using a plate press or a belt press. A core material using a long fiber, which is produced by the manufacturing method of any one of claims 1 to 4 and 7 to 11. 1. A vacuum insulation material used as a home appliance and a building material,
A core member (110) formed by laminating a plurality of glass fiber boards (111) manufactured according to any one of the manufacturing methods of any one of claims 1 to 4, and 11 to 11; And
And a cover material (120) for vacuum packing the core material (110). 14. The method of claim 13,
The glass fiber board (111)
Wherein at least two layers are stacked. 15. The method of claim 14,
The glass fiber board (111)
Wherein both sides of the glass fiber board (111) are laminated in a step or concave shape so that both side portions of the glass fiber board (111) overlap each other. 14. The method of claim 13,
The glass fiber board (111)
Wherein the vacuum insulation material is laminated via an adhesive.

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