KR101355675B1 - Flame retardant complex film and vacuum insulation panel applied the same - Google Patents

Abstract

The present invention relates to a composite film for vacuum insulator and a vacuum insulator using the same, a barrier layer and a barrier layer which is adhered to the protective layer and absorbs and distributes an external impact and blocks the inflow of external gas or water. The flame retardancy of the vacuum insulator is provided by providing a composite film for vacuum insulator, which is adhered to the lower part of the layer and adheres to the surface of the core material, and is provided with a film-shaped flame retardant coating layer on which the flame retardant is added. And to inventions capable of improving both thermal insulation.

Description

Flame retardant composite film and vacuum insulator using the same {FLAME RETARDANT COMPLEX FILM AND VACUUM INSULATION PANEL APPLIED THE SAME}

The present invention relates to a composite film for a vacuum insulation material and a vacuum insulation material using the same, by applying a flame retardant coating layer is added to the composite film flame retardant in order to add flame retardancy to the composite film used as the outer material of the vacuum insulation material, the flame retardant performance is It relates to a vacuum insulator which is excellent, has low thermal conductivity, and is capable of thinning in thickness.

Vacuum Insulation Pannel (Vacuum Insulation Pannel) is a shell material composed of a composite plastic laminate film with excellent gas barrier properties as a core material is a continuous foamed rigid plastic foam or inorganic material, and after depressurizing the interior, the gas barrier film of the peripheral edge It is produced by heat-sealing the laminated portion.

Such vacuum insulation material is used for home appliances such as TVs, mobile phones, water purifiers, hot and cold water heaters, laptops, fuel cell cases, and interior finishing materials for transportation such as automobiles and ships, and the vacuum insulation material used here is flame retardant or nonflammable to withstand heat. Required.

However, the composite film for vacuum insulation generally manufactured is not flame retardant because it is made of an organic material as disclosed in a number of documents, such as Korean Patent Publication No. 1998-0078092. Therefore, since the vacuum insulator using the conventional composite film as the shell material is susceptible to heat, when applied in a high temperature environment, the shell material may be damaged and the thermal insulation performance may deteriorate.

An object of the present invention is to provide a technique for forming a flame retardant coating layer to which a flame retardant is added to provide a composite film for vacuum insulation excellent in flame retardancy.

In addition, an object of the present invention is to provide a vacuum insulation material that is excellent in flame retardancy and maximizes thermal insulation performance in a high temperature environment by applying the composite film as described above.

The composite film for vacuum insulation material according to the present invention for achieving the above object is a protective layer for absorbing and dispersing an external impact, a barrier layer bonded to the lower portion of the protective layer, and blocking the inflow of external gas or moisture and The film is flame-retardant coating layer is adhered to the lower barrier layer, the thermal welding layer is in close contact with the surface of the core material, the flame-retardant coating layer is added to the flame retardant is added on the protective layer.

In addition, the vacuum insulator according to the present invention for achieving the above another object is formed of a core film and a composite film having a barrier property against gas or moisture and includes an outer cover material covering the core material, the composite film is subjected to external impact A protective layer for absorbing and dispersing, a barrier layer adhered to the lower portion of the protective layer, the barrier layer including aluminum foil, and a heat welding layer adhered to the lower portion of the barrier layer and in close contact with the core material. It is characterized in that the flame-retardant coating layer on the film is added to the flame retardant is added.

As described above, the composite film for vacuum insulation material according to the present invention is coated with a flame retardant is added to the flame retardant coating layer, there is an advantage that the flame retardancy and non-combustibility is very excellent compared to the conventional composite film for vacuum insulation.

In addition, the vacuum insulation material according to the present invention has the advantage that there is no deterioration of the insulation performance even when used in a high temperature environment, the composite film used as the shell material having a flame-retardant coating layer, and excellent flame retardancy and insulation even if manufactured in a thin thickness At the same time there is an advantage.

1 is a cross-sectional view showing the structure of a composite film for vacuum insulating material according to the present invention.
Figure 2 is a cross-sectional view showing the structure of the protective layer in the composite film for vacuum insulating material according to the present invention.
3 is a cross-sectional view showing the structure of the barrier layer in the composite film for vacuum insulating material according to the present invention.
4 is a cross-sectional view showing the structure of a vacuum insulator according to the present invention.
5 is a photograph showing a vacuum insulator test piece subjected to UL 94-V test.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to the flame-retardant composite film for a vacuum insulation material and a vacuum insulation material applied thereto.

Composite film for vacuum insulation

1 is a cross-sectional view showing the structure of a composite film for vacuum insulating material according to an embodiment of the present invention.

Referring to FIG. 1, the composite film 500 for a vacuum insulator includes a flame retardant coating layer 100, a protective layer 200, a barrier layer 300, and a thermal welding layer 400.

Hereinafter, "upper" means a surface in the outward direction of the vacuum insulator, and "lower" means a surface in the inward direction of the vacuum insulator.

Flame Retardant Coating Layer (100)

The flame retardant coating layer 100 serves to protect from external heat when the vacuum insulator is applied in a high temperature environment. The flame retardant coating layer 100 includes a flame retardant, and is formed by coating on top of the protective layer 200.

When the vacuum insulator is used in a home appliance or the like having a relatively high temperature environment of 70 to 140 ° C., problems such as damage to the shell material caused by sudden smoke or high heat may occur. The composite film for vacuum insulation according to the present invention is formed with a flame retardant coating layer 100 containing a flame retardant to solve this problem.

The flame retardant coating layer 100 is added with a flame retardant for imparting flame retardancy. The flame retardant is not particularly limited as long as the material is imparted with flame retardancy, but preferably one or more materials selected from non-halogen type phosphorus compounds, nitrogen compounds, aluminum hydroxide, and antimony trioxide may be used.

Herein, the nitrogen compound is a generic term for flame retardants such as melamine type, urea type, amine type, and amide type, and phosphorus compounds are collectively referred to as phosphorus type flame retardants such as phosphorus and phosphoric acid esters. Preferably, the synergistic effect of flame retardant performance can be obtained by mixing the nitrogen compound and the phosphorus compound.

In addition, aluminum hydroxide is preferable as a flame retardant used in the present invention because it is less corrosive, has excellent electrical insulation, and is economically advantageous, and antimony trioxide has an advantage of a flame-retardant synergistic effect when it is used simultaneously with other flame retardants.

The flame retardant coating layer 100 may be formed by coating a surface of the protective layer 200 with a coating composition consisting of 10 to 90% by weight of the flame retardant and 10 to 90% by weight of a polymer resin and an organic solvent. In addition, it is preferably formed by coating on the upper portion of the protective layer 200 using a coating composition of 5 to 50% by weight of the phosphorus compound, 5 to 50% by weight of the nitrogen compound and 40 to 90% by weight of the polymer resin and the organic solvent. can do. When the phosphorus compound is added in less than 5% by weight, or when the nitrogen compound is added in less than 5% by weight, it is difficult to secure sufficient flame retardancy. In addition, when the phosphorus compound is added in excess of 50% by weight or the nitrogen compound is added in excess of 50% by weight, the content of other materials other than the flame retardant component may be reduced, thus making it difficult to form the flame retardant coating layer. The polymer resin and the organic solvent are preferably added in an amount of 40 to 90% by weight, and when added in an amount less than 40% by weight, difficulty in forming a flame retardant coating layer may be obtained. it's difficult.

The polymer resin may be a polymer resin such as polyester or polyurethane, and the organic solvent may be used without limitation as long as it is an organic solvent used in a general coating composition.

The coating method in which the flame retardant coating layer 100 is formed is not particularly limited. Preferably by a spray coating method, a roll coating method, or a gravure printing method.

In addition, the thickness of the flame-retardant coating layer 100 is also not particularly limited, but the limitation of a certain thickness is required according to the characteristics of the composite film to be manufactured and the thinning of the vacuum insulator. Therefore, it is preferable that the thickness of the flame-retardant coating layer 100 is 0.5-10 micrometers.

Protective layer (200)

The protective layer 200 absorbs and disperses external shocks, thereby protecting the surface or the core inside the vacuum insulator from external shocks. Therefore, the protective layer 200 is preferably formed of a material having excellent impact resistance.

As the material of the protective layer 200, a polycarbonate film, a polyimide film, a nylon film, or a polyethylene terephthalate (PET) film may be provided. One or more films among the films may be selected and used as a laminate, and a nylon film and a PET film may be bonded to each other as a protective layer. It is preferable that each of the above films is used in a thickness of 12 to 25 탆. If the thickness of the film is less than 12 ㎛ is likely to be damaged by an external impact or scratches, such as does not exhibit the function of the protective layer inherent, there is a disadvantage such as a cost problem when each film exceeds 25 ㎛ presented.

In addition, as shown in FIG. 2, an inorganic layer 200b made of aluminum (Al) or inorganic silica (Si ₂ O _3, etc.) may be formed on one surface of the film forming the protective layer 200.

The inorganic layer 200b may be added in terms of impact resistance, heat resistance, cold resistance, scratch resistance, moisture barrier property, gas barrier property and flexibility, and the thickness thereof is preferably 500 nm or less, More preferably, When the thickness of the inorganic layer (200b) is less than 5 nm, the barrier performance against gas, moisture and the like can not be exhibited properly. When the thickness of the inorganic layer (200b) is more than 300 nm, the barrier performance can be sufficiently exhibited, but it is not preferable because an excessive processing cost is required for forming the inorganic layer.

The inorganic layer (200b) may be formed by a deposition (such as Si ₂ O ₃₎ The aluminum (Al) or an inorganic silica.

Barrier layer 300

The barrier layer 300 is adhered to the lower portion of the protective layer 200, and serves to maintain the internal vacuum degree and block inflow of external gas or moisture.

In the present invention, an aluminum foil (Al foil) having excellent barrier properties is used as the material of the barrier layer 300, and among aluminum foils, iron (Fe) content of 0.65% by weight or less may be used. In the case of aluminum foil having an iron (Fe) content of more than 0.65% by weight, the increase in manufacturing cost is much larger than the improvement of barrier property, which is not preferable.

The thickness of the aluminum foil is preferably 6 to 12 mu m. When the thickness of the aluminum foil is less than 6 탆, cracks or defects may occur in the rolling process. When the thickness of the aluminum foil is more than 12 탆, heat is transferred along the aluminum foil having a high thermal conductivity, There is a problem that can be deteriorated.

On the other hand, when the aluminum foil is torn, gas or moisture may penetrate through the torn portion, thereby inhibiting long-term durability of the vacuum insulator.

Accordingly, in the present invention, a PET film or an EVOH (Ethylene Vinyl Alcohol) film may be adhered to the aluminum foil as a protective layer in order to supplement the barrier performance of the aluminum foil.

In addition, in the present invention, a PET film or an ethylene vinyl alcohol (EVOH) film in which the inorganic layer 300c made of aluminum or silica is formed may be used.

It is preferable that the thickness of the said PET film or EVOH film is 12-16 micrometers. If the thickness of the film is less than 12㎛ there is a problem that a defect may occur or tear when forming the film, if the film exceeds 16㎛ there is a problem that the workability is lowered, the overall film manufacturing cost rises.

The inorganic layer 300c may be added in terms of impact resistance, heat resistance, cold resistance, scratch resistance, moisture barrier, gas barrier, and flexibility, and the thickness thereof is preferably formed to be 500 nm or less, and 5 to 300 nm. It is more preferable to form. When the thickness of the inorganic layer 300c is less than 5 nm, the barrier performance against gas or moisture cannot be properly exhibited. In addition, when the thickness of the inorganic layer 300c exceeds 300nm, the barrier performance can be sufficiently exhibited, but it is not preferable because excessive process costs are required to form the inorganic layer 300c.

The inorganic layer 300c may be formed by depositing aluminum (Al) or inorganic silica (Si ₂ O _3, etc.).

As in the example illustrated in FIG. 3, the barrier layer 300 may include an EVOH film 300b in which the inorganic layer 300c is formed, and is bonded to the thermal welding layer 400 by being positioned inward from the outer cover material of the vacuum insulator. It is preferable that the aluminum foil 300a is relatively positioned outside to be bonded to the protective layer 210.

This is to complement the barrier performance of the aluminum foil in the case of the EVOH film (300b) in the present invention, the aluminum foil is much excellent in the barrier performance except the edge portion is located outside to act as a barrier for gas or moisture, EVOH This is because the film 300b preferably acts as a barrier only against the gas, moisture, and the like that are penetrated by the tearing of the aluminum foil 300a.

Thermal welding layer 400

The heat welding layer 400 is adhered to the bottom of the barrier layer 300, and is in close contact with the core surface of the vacuum insulator.

 The thermal welding layer 400 may be easily thermally welded, and also has excellent sealing property, such as LLDPE (Linear Low-Density Polyethylene), LDPE (Low Density Polyethylene), HDPE (High Density Polyethylene), CPP (Casting Polypropylene), and the like. It is preferable that it is formed by the film which consists of single or 2 types or more mixed.

It is preferable that the thickness of the heat welding layer 400 is 50 ~ 80㎛. If the thickness of the heat welding layer 400 is less than 50㎛ the peel strength of the heat welding layer is not effective to the role of the layer, and if the thickness of the heat welding layer 400 exceeds 80㎛ cost problems and heat welding The amount of gas or water vapor that enters through the layer increases, which causes the long-term durability of the vacuum insulator.

In addition, the thermal welding layer 400 has a crystallinity of 30% or more, and preferably has a softening point of 70 to 130 ° C. and a melting point of 100 to 170 ° C.

When the crystallinity of the thermal welding layer 400 is less than 30%, there is a disadvantage in that the internal vacuum degree is lowered due to the deterioration of barrier performance due to easy loosening of the intermolecular bonding force at a high temperature.

When the softening point of the heat welding layer 400 is less than 70 ℃, when using a vacuum insulator at a high temperature, there is a disadvantage that the intermolecular bonding strength of the heat welding layer is loosened to deteriorate the barrier performance of the outer cover material, and also the heat welding layer is reduced (Shrink There is a problem in that the internal vacuum of the vacuum insulation material is dismantled by causing a leak such as) to cause a leak (leak) to the outer cover material. If the softening point of the heat welding layer 400 exceeds 130 ℃, there is a disadvantage in that excessive heat and pressure must be applied to seal the heat welding layer.

And when the melting point of the thermal welding layer 400 is less than 100 ℃, there is a disadvantage that the internal vacuum is dismantled by breaking the heat welding layer due to the melting of the heat welding layer at a high temperature, if the temperature exceeds 170 ℃ of the heat welding layer The disadvantage is that excessive heat and pressure must be applied for sealing.

On the other hand, the films forming each layer are bonded to each other by an adhesive layer (not shown). In the composite film according to the present invention, it is preferable that the interlayer adhesive strength be 200 gf / 15 mm or more when used as the outer cover material for the vacuum insulator. If the adhesive strength is less than 200 gf / 15 mm, there may be a problem that peeling when applied to the outer shell material for vacuum insulation.

At this time, the adhesives which can be used to form the adhesive layer can be used alone or in combination of two or more thereof with a polyester adhesive or a polyurethane adhesive.

Vacuum insulation

Figure 4 is a cross-sectional view showing the structure of a vacuum insulator according to an embodiment of the present invention.

Referring to FIG. 4, the vacuum insulator using the composite film illustrated in FIGS. 1 to 3 as an outer cover material includes a core material 600 and an outer cover material 500 formed of the composite film. In addition, the vacuum cleaner may further include a getter 700 applied for the purpose of removing moisture inside the vacuum insulator.

At this time, the envelope 500 is made of a composite film according to the present invention mentioned above, a flame retardant coating layer is formed for the addition of flame retardant performance.

The core 600 of the vacuum insulator according to the present invention may be used without limitation as long as it is a known core material having glass fiber, glass wool, and heat insulation.

Preferably, the core material 600 may be formed by laminating one or more boards in which an agitated glass fiber is thermocompressed in an aqueous solution containing water or an organic compound. One or more plate-shaped boards (Board) made of a glass fiber aggregate of 1 to 10 μm and an inorganic binder containing silica may be formed by being stacked.

In addition, the core material 600 may be formed by laminating one or more mats of plate-shaped mats on which glass wool is required. The density of the mat is preferably 100 ~ 300 g / mm ³ . When the density of the mat is less than 100 g / mm ³ , it is difficult to secure sufficient thermal insulation performance. When the mat has a density of more than 300 g / mm ³ , there is a disadvantage in that the handling is not easy and the bendability of the vacuum insulation is reduced.

The vacuum insulation material according to the present invention may further include a getter 700 for the purpose of moisture absorption inside the vacuum insulation material. The getter 700 is attached to the core material or applied to the core material. 4 shows an embodiment in which the getter is inserted into the core material and applied.

The getter may comprise a quicklime (CaO) powder having a purity of at least 95%, and at least one material selected from zeolite, cobalt, lithium, activated carbon, aluminum oxide, barium, calcium chloride, magnesium oxide, magnesium chloride, iron oxide, zinc and zirconium. It is preferable to include.

After inserting the core material and the getter into the shell material encapsulation and depressurizing the inside of the shell material, the heat-welding portion 510 of the shell material is sealed to manufacture a vacuum insulation material. The manufactured vacuum insulation material is used after folding the heat welding portion 510 to the core material side. When the vacuum insulator according to the present invention is manufactured in a thin film form having a thin thickness of 3 mm or less and applied to a home appliance or the like, the width of the heat welding part 510 is preferably 6 to 15 mm.

The vacuum insulation prepared as described above has an advantage of exhibiting excellent performance in both flame retardancy and insulation even under a temperature condition of 70 to 140 ° C. corresponding to a high temperature.

In particular, a display device such as a TV is required to apply a thin-film vacuum insulation material that requires flame retardancy and heat insulation at the same time, the vacuum insulation material according to the present invention is applied to less than 3mm to effectively block the heat generated from the PCB substrate of the optical sheet By preventing deterioration, there is an advantage of improving the durability, such as the sharpness of the device.

Hereinafter will be described with respect to an embodiment for a vacuum insulation material applied a composite film according to the present invention.

Example 1

Barrier layer consisting of a PET film deposited with a thickness of 250 nm and a protective layer with a thickness of 12 μm / aluminum foil of 7 μm, and a laminate of aluminum with a 250 nm deposited EVOH film of 7 μm / CPP with a thickness of 60 μm. A composite film having a structure in which a thermal welding layer made of a polypropylene film was sequentially stacked was prepared. Thereafter, a flame retardant coating layer was formed on the upper portion of the protective layer with a coating composition consisting of 30 wt% of nitrogen compound, 30 wt% of phosphorus compound, 20 wt% of polyester-based polymer resin, and 20 wt% of organic solvent (MEK). A composite film according to the present invention was prepared.

Next, a vacuum insulation material was applied to the composite film as an outer covering material. The core material of the vacuum insulation material was produced using glass fibers and an inorganic binder. In addition, a getter made of quicklime powder having a purity of 98% was inserted into the core material. The vacuum insulator thus prepared is 125 mm long, 13 mm long and 2.4 mm thick.

Example 2

A vacuum coating material prepared under the same conditions as in Example 1, but having a flame retardant coating layer formed thereon, comprising 50 wt% of a flame retardant additive including aluminum hydroxide and antimony trioxide, 20 wt% of a urethane-based polymer resin, and 30 wt% of an organic solvent. In the case of the barrier layer, a PET film was used instead of the EVOH film, and in the case of the thermal welding layer, the LLDPE (Linear Low-Density Polyethylene) was used instead of the CPP (Casting Polypropylene) film.

Example 3

All the same conditions as in Example 1 to prepare a vacuum insulator, the core material was produced in a mat type of needling glass wool.

Comparative Example 1

All the same conditions as in Example 1 to prepare a vacuum insulation, it was produced by applying an outer material without a flame-retardant coating layer.

Comparative Example 2

All the same conditions as in Example 2 to prepare a vacuum insulating material, but was produced by applying an outer material without a flame-retardant coating layer.

Experimental Example

1) Thermal conductivity measurement

[Table 1]

As a result of measuring the thermal conductivity of the vacuum insulators of Examples 1 to 3, it can be seen from Table 1 that all have a value of 0.0100 Kcal / mhr ° C. or less. At this time, HC-074300 (made by Ecosei Seiki) thermal conductivity measuring instrument was used for the measurement of thermal conductivity.

2) flame retardancy test

i) UL 94-HB test

The vacuum insulators of Examples 1 to 3 and Comparative Examples 1 and 2 were evaluated for flame retardancy by the HB method in accordance with the UL 94 certification.

The test was conducted by placing lines on 25 and 100 mm portions of the test piece, laying the test piece in a horizontal direction, and then applying a test flame to the test piece at a 45 ° angle for 30 seconds. The burning rate is calculated by measuring the time from when the flame begins to pass through the 25 mm section and reaches the 100 mm section.

[Table 2]

UL 94-HB test results for Examples 1 to 3 and Comparative Examples 1 to 2 are summarized in Table 2 above. Looking at the Table 2, Examples 1 to 3 did not burn to 25mm in the horizontal direction even after applying a flame for 30 seconds. That is, the burn rate of the vacuum insulator according to Examples 1 to 3 is zero.

On the other hand, the vacuum insulators according to Comparative Examples 1 and 2 were continuously burned to have a horizontal length of 69 and 70 mm, and the total burned time was 74 and 76 seconds. When the combustion rate is measured through the combustion time and the horizontal horizontal length of combustion over the 25 mm portion, Comparative Example 1 corresponds to 77.6 mm / min and Comparative Example 2 corresponds to 77.14 mm / min.

UL 94-HB test certified burn rate criteria for test specimens having a thickness of less than 3 mm is less than 75 mm / min, Examples 1 to 3 meet the criteria, while Comparative Examples 1 to 2 are certified according to UL 94-HB. It can be seen that the criteria are not met.

That is, the vacuum insulating material according to the embodiments 1 to 3 has a thickness of less than 3mm, but it was confirmed that the flame retardancy is very excellent due to the flame-retardant coating layer formed on the outer cover material.

ii) UL 94-V testing

In addition, the flame resistance of the vacuum insulators of Examples 1 to 3 and Comparative Examples 1 to 2 were evaluated through a UL 94-V test.

In this test, flame retardancy was evaluated by producing Examples and Comparative Examples having a thickness of 1 mm.

The UL 94-V test places the specimen vertically, applies flame at the end for 10 seconds, then measures the time (T1) at which combustion of the specimen proceeds, and then flames at the end of the specimen for 10 seconds, and then It was carried out in such a way as to measure the time T2 at which combustion was finished.

[Table 3]

UL 94-V test results for Examples 1 to 3 and Comparative Examples 1 to 2 are summarized in Table 3 above. Looking at the Table 3, Examples 1 to 3, the combined combustion time of T1 and T2 is less than 30 seconds, the total combustion time is short compared to 41, 54 seconds of the combustion time (T1 + T2) of the comparative example It became. That is, it can be seen that the embodiment having the outer cover material with the flame retardant coating layer formed thereon has a shorter combustion time than that of the comparative example, thereby having excellent flame retardancy.

In addition, Figure 5 is a photograph showing a test piece subjected to the UL 94-V test, ① ~ ⑤ test pieces correspond to Comparative Examples 1 and 2, Examples 1 to 3 in order. Referring to FIG. 5, Examples 1 to 3 corresponding to ③, ④, and ⑤ can visually confirm that blackened portions are less than those of the comparative examples.

Through the flame retardancy test, Examples 1 to 3 it was confirmed that due to the flame retardant coating layer formed on the top of the outer shell material is very excellent in flame retardancy compared to the conventional vacuum insulation.

3) Thermal effect test when applying vacuum insulation

In addition, the vacuum insulator of Examples 1 to 3 was applied between the optical sheet inside the LED TV and the PCB substrate. As a result, it was confirmed that the heat generated from the PCB substrate has a thermal cutoff effect of 5 ° C or more compared with the case where the vacuum insulation is not applied in the process of transferring to the optical sheet.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments and can be manufactured in various forms, and having ordinary skill in the art to which the present invention pertains. It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

100: flame retardant coating layer
200: protective layer
300: barrier layer
400: heat welding layer
500: composite film
510: heat welding
600: heartwood
700: getter

Claims (25)

A protective layer for absorbing and dispersing external impacts;
A barrier layer adhered to the lower portion of the protective layer and blocking inflow of external gas or moisture; And
And a heat welding layer adhered to the barrier layer and adhered to the surface of the core material.
The flame-retardant coating layer on the film is a flame retardant is added on top of the protective layer is formed,
The flame retardant coating layer is formed by coating the composition of the flame retardant 10 to 90% by weight of the polymer resin and 10 to 90% by weight of the organic solvent, the flame retardant comprises a nitrogen compound and a phosphorus compound Composite film for vacuum insulation material.
delete delete The method of claim 1,
The flame retardant coating layer
5 to 50% by weight of the phosphorus compound, 5 to 50% by weight of the nitrogen compound and
40 to 90% by weight of the composition of the polymer resin and the organic solvent is coated on the upper portion of the protective layer, characterized in that the composite film for vacuum insulation.
The method of claim 1,
The flame retardant coating layer
It is formed by spray coating, roll coating and gravure printing,
Composite film for vacuum insulation material having a thickness of 0.5 ~ 10 ㎛.
The method of claim 1,
The protective layer
At least one film selected from a polycarbonate film, a polyimide film, a nylon film, and a polyethylene terephthalate (PET) film is formed by stacking a thickness of 12 to 25 μm, respectively.
The method according to claim 6,
An inorganic layer made of aluminum or silica is formed on either side of the film (s) forming the protective layer,
The inorganic layer is a composite film for vacuum insulation, characterized in that formed in a thickness of less than 500nm.
The method of claim 1,
The barrier layer
An aluminum foil having a thickness of 6 to 12 μm and a PET film or an ethylene vinyl alcohol (EVOH) film having a thickness of 6 to 12 μm, respectively, are bonded to each other.
9. The method of claim 8,
On either side of the PET film and the EVOH film
A composite film for vacuum insulation, characterized in that an inorganic layer made of aluminum or silica is formed.
The method of claim 1,
The heat-
A composite film for vacuum insulation, characterized in that formed of a film made of at least one material selected from linear low-density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE) and casting polypropylene (CPP).
11. The method of claim 10,
The heat-
Having a thickness of 50 to 80 탆,
A composite film for vacuum insulation, characterized in that it has a degree of crystallization of at least 30%, a softening point of 70 to 130 ℃ and a melting point of 100 to 160 ℃.
The method of claim 1,
The protective layer, the barrier layer and the thermal welding layer are each bonded by a polyurethane-based resin or a polyester-based resin, the interlayer adhesive strength is characterized in that the composite film for vacuum insulation material characterized in that the 200 gf / 15 mm or more.
Heartwood; And
It is formed of a composite film having a barrier to gas or moisture, and covers the core material; includes;
The composite film
A protective layer that absorbs and disperses external impacts,
A barrier layer adhered to the lower portion of the protective layer and provided with an aluminum foil;
Is bonded to the lower portion of the barrier layer, and includes a heat welding layer in close contact with the core material,
On the upper portion of the protective layer is formed a film-like flame retardant coating layer is added flame retardant,
The flame retardant coating layer is formed by coating the composition of the flame retardant 10 to 90% by weight of the polymer resin and 10 to 90% by weight of the organic solvent, the flame retardant comprises a nitrogen compound and a phosphorus compound Vacuum insulation.
delete delete The method of claim 13,
The flame retardant coating layer
5 to 50% by weight of the phosphorus compound, 5 to 50% by weight of the nitrogen compound and
40 to 90% by weight of the polymer resin and the organic solvent composition is coated on the upper portion of the vacuum insulating material, characterized in that formed.
The method of claim 13,
The flame retardant coating layer
It is formed by spray coating, roll coating and gravure printing,
Vacuum insulator, characterized in that having a thickness of 0.5 ~ 10 ㎛.
The method of claim 13,
The thermal conductivity is 0.01 kcal / mhr ℃ or less, and has a thickness of 3 mm or less, vacuum insulator.
The method of claim 13,
The core
A vacuum insulator, characterized in that at least one plate-shaped board (Board) in which the stirred glass fiber is thermally compressed in an aqueous solution containing water or an organic compound.
The method of claim 13,
The core
At least one plate-shaped board (Board) consisting of a glass fiber aggregate having a diameter of 1 to 10 ㎛ and an inorganic binder containing silica is laminated.
The method of claim 13,
The core
Glass wool (Glass wool) is a vacuum insulation, characterized in that one or more laminated mat (Needling) treated plate (Mat) laminated.
22. The method of claim 21,
The density of the mat is a vacuum insulation, characterized in that 100 ~ 300 g / mm ³ .
The method of claim 13,
Vacuum insulator, characterized in that it further comprises a getter (Getter) attached to or inserted into the core material.
24. The method of claim 23,
The getter
Vacuum insulation comprising a quicklime (CaO) powder of at least 95% purity.
24. The method of claim 23,
The getter
A vacuum insulation material comprising at least one material selected from zeolite, cobalt, lithium, activated carbon, aluminum oxide, barium, calcium chloride, magnesium oxide, magnesium chloride, iron oxide, zinc and zirconium.

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