WO2019103309A1 - Laminate for outer cover material of vacuum insulation material, and outer cover material of vacuum insulation material, including same - Google Patents

Abstract

The present application relates to a laminate for an outer cover material of a vacuum insulation material, and an outer cover material of a vacuum insulation material, including the same.

Description

Vacuum Insulation Laminate for sheath material and vacuum insulation material including it

The present application relates to a laminate for a vacuum insulation panel shell material and a vacuum insulation panel shell material containing the same.

The vacuum insulation material is composed of a sheath material with low gas or moisture permeability, a core material having excellent heat insulation effect in a vacuum state, a getter material, and a sheath material having high water and gas barrier properties, It is a high-tech material that has recently increased in demand because of its high insulation performance several times higher than existing insulation materials such as urethane and styrofoam.

Generally, a vacuum insulation material is formed by including a metal component, thereby maintaining a vacuum state in the outer material to maintain gas barrier properties, moisture barrier properties, and insulation properties of the core.

On the other hand, the thermal efficiency of the vacuum heat insulator largely depends on the performance of the core material, but is also influenced by the thermal conductivity of the casing material surrounding the core material. Therefore, heat transfer phenomena due to high thermal conductivity of metal components may occur in a case of a vacuum insulation material containing a metal component. In order to minimize this, the metal was deposited on the substrate layer in the form of a metal thin film. As a concrete example, a cover material of a vacuum insulation material such as Korean Patent Laid-Open Publication No. 10-2017-0001232 includes three barrier layers, a first base layer, a second base layer, a third base layer . However, the barrier layer in the form of a base layer on which the metal is deposited is not effective in heat shielding.

Therefore, in order to reduce the heat transfer phenomenon of the vacuum insulation material, it is required to develop a material minimizing the metal component.

In order to solve the problems of the prior art, the present application has been made in order to solve the above-mentioned problems of the prior art by forming a thin film layer including a metal barrier layer including a base material layer formed with a metal deposition layer, a moisture containing at least one of an organic material and an inorganic material, And at least one nonmetal barrier layer including a base layer and a thermally adhesive layer at the lower end of the nonmetal barrier layer.

The present application also aims to provide a vacuum insulator shell material comprising the laminate.

In order to achieve the above-mentioned object, the present application discloses a substrate layer having a thin film layer including a metal barrier layer including a base material layer formed with a metal deposition layer, a moisture barrier material including at least one of an organic material and an inorganic material, And a thermal adhesive layer at the lower end of the non-metallic barrier layer.

The laminated material for a vacuum insulation material of the present invention has the effect of minimizing the difference in thermal conductivity and thermal conductivity before and after the thermal shock due to minimization of the metal deposition layer as compared with the conventional laminated material for a vacuum insulation material.

The present application also has the effect of providing a vacuum insulator shell material including the above laminate.

In order to solve the problems of the prior art, the present application has been made in order to solve the above-mentioned problems of the prior art by forming a thin film layer including a metal barrier layer including a base material layer formed with a metal deposition layer, a moisture containing at least one of an organic material and an inorganic material, And at least one nonmetal barrier layer including a base layer and a thermally adhesive layer at the lower end of the nonmetal barrier layer.

The present application also aims to provide a vacuum insulator shell material comprising the laminate.

In order to achieve the above-mentioned object, the present application discloses a substrate layer having a thin film layer including a metal barrier layer including a base material layer formed with a metal deposition layer, a moisture barrier material including at least one of an organic material and an inorganic material, And a thermal adhesive layer at the lower end of the non-metallic barrier layer.

The metal barrier layer may include a base layer formed on one surface or inside of the metal deposition layer. The metal deposition layer may be formed by depositing aluminum. The optical density (OD) of the metal deposition layer may be 2.0-4.0, and specifically, the optical density may be 3.5-4.0. The thickness of the metal deposition layer may be 30-40 nm. When the thickness of the metal deposition layer is in the above range, the durability of the laminate material for the cover material deteriorates, pinholes are not easily generated, and the inflow of foreign matter in the process can be prevented.

The base layer of the metal barrier layer may be formed of at least one of polyester, polyolefin, polyamide, and glass fiber independently of the non-metallic barrier layer described later. Specifically, the base layer may be a polyester, a polyolefin or a polyamide film or a sheet, or may be a polyester or a glass fiber nonwoven fabric, or may include at least one of the film or the sheet and a nonwoven fabric.

The base layer may be formed to a thickness of 5 탆 to 30 탆, specifically 10 탆 to 20 탆, more specifically 10 탆 to 15 탆, most specifically 11 탆 to 13 탆, It is not limited. If the thickness of the base layer is less than 5 mu m, the outer surface of the vacuum insulation panel material may be easily damaged by external impact or scratches, and if it exceeds 30 mu m, the manufacturing cost may be increased and the workability may be deteriorated.

The non-metallic barrier layer includes a base layer on which a thin film layer is formed, and one or more layers may be formed on the laminate for a vacuum insulation panel. The non-metallic barrier layer is transparent, but has a gas barrier property equivalent to that of the conventional metal layer, and little difference in thermal conductivity and thermal conductivity before and after thermal shock.

The thin film layer may be formed on the upper surface of the base layer with water and a gas barrier material including at least one of an organic material and an inorganic material. Specifically, the organic material may be at least one selected from the group consisting of ethylene vinyl alcohol, polyvinyl alcohol, and nano-clay, and the inorganic material may be at least one selected from the group consisting of silicon oxide and aluminum oxide. The organic material may be a thin film layer formed by coating or curing an organic material such as a plate-like or needle-like material on a substrate layer. The inorganic material may be deposited on the substrate layer by a method such as vacuum deposition, The material and the inorganic material may be barrier and may be formed in plural on the base layer in a composite coating manner.

The thin film layer may be formed to have a sufficient thickness to have moisture and gas barrier properties, and may be specifically 0.1 탆 to 1 탆, more specifically 0.3 탆 to 0.9 탆, most specifically 0.3 탆 to 0.6 탆. If the thin film layer is thicker than 1 占 퐉, the processability of the laminated material may be deteriorated.

The base layer of the non-metallic barrier layer may be formed of any one or more of polyester, polyolefin, polyamide, and glass fiber independently of the metal barrier layer. Specifically, the base layer may be a polyester, a polyolefin or a polyamide film or a sheet, or may be a polyester or a glass fiber nonwoven fabric, or may include at least one of the film or the sheet and a nonwoven fabric. The base layer may be formed to a thickness of 5 mu m to 30 mu m. If the thickness of the base layer is less than 5 mu m, the outer surface of the vacuum insulation panel material may be easily damaged by external impact or scratches, and if it exceeds 30 mu m, the manufacturing cost may be increased and the workability may be deteriorated.

The non-metallic barrier layer may be formed on at least one of the laminated material for the vacuum insulation material outer cover material, and specifically two or more of them may be formed. The non-metallic barrier layer may have at least one non-metallic barrier layer, and may be laminated with the metallic barrier layer to have moisture and gas barrier properties. Specifically, the non-metallic barrier layer may be formed to include a first non-metallic barrier layer and a second non-metallic barrier layer.

The gas barrier material of the first nonmetal barrier layer and the second nonmetal barrier layer may include an organic material or an inorganic material, and may include different materials. The gas barrier material of the first nonmetal barrier layer includes an organic material, and the gas barrier material of the second nonmetal barrier layer may include an inorganic material. By using the first nonmetal barrier layer and the second nonmetal barrier layer to include different materials, the disadvantages of each material can be compensated to minimize deterioration under various temperature and humidity conditions.

The thermal adhesive layer is formed at the lower end of the non-metallic barrier layer, and the thermal adhesive layer is a layer which is thermally adhered to the thermal adhesive layer of the laminated material for another vacuum insulation panel material when the vacuum thermal insulator is manufactured. The thermal adhesive layer may include at least one of a polyolefin-based resin, an ethylene-vinyl acetate copolymer (EVA) resin, and a methacrylate-methylethylene copolymer resin.

The thermal adhesive layer may be formed to a thickness of 20 to 60 탆, specifically 30 to 50 탆. If the thickness of the heat-adhesive layer is less than 20 mu m, the adhesive force may be weak and the heat-adhesion may not be achieved. If the thickness exceeds 60 mu m, the inflow amount of the external gas and water vapor through the sealing layer may increase, and the durability of the vacuum insulation material may deteriorate.

Each layer of the laminate material for the vacuum insulation panel sheathing material may be adhered by an adhesive layer. Specifically, the adhesive layer may be a polyurethane-based adhesive, and the adhesive layer may be formed by applying 2 to 8 g / m ² , specifically 3 to 4 g / m ² .

The laminated material for the vacuum insulation panel material is prepared by preparing one or more nonmetal barrier layers including a metal barrier layer including a base material layer having a metal deposition layer and a base layer having a thin film layer formed thereon, And bonding the thermally adhesive layer to the bottom surface with an adhesive. Each of the metal barrier layer and the non-metallic barrier layer can determine the stacking order and direction in consideration of oxygen and moisture barrier properties, and more specifically, a metal barrier layer including a substrate layer having a metal deposition layer formed thereon from above, A first nonmetal barrier layer having a thin film layer formed on the substrate surface and a second nonmetal barrier layer having a thin film layer formed on the top surface of the substrate layer, the gas barrier material including an inorganic material, The coating or deposition layer is bonded together.

The laminated material for the vacuum insulation panel sheathing material may have a reduced change in thermal conductivity. MK or 2.2 mW / mK and / or 2.5 mW / mK, 2.7 mW / mK, or 3.0 mW / mK, respectively, as compared with the initial thermal conductivity of the vacuum insulation material of the laminated material for a vacuum insulation panel. mW / mK. < / RTI > The thermal conductivity measurement may be a comparison of thermal conductivities measured after 1, 2, 3, 4, 5, or 6 weeks of storage under the accelerated test conditions (temperature 80 ° C, 65% RH).

Further, the present application provides a vacuum insulator shell material using the laminate for a vacuum insulator shell material.

The envelope material of the vacuum insulation material may further include a protective layer on the laminated material. The protective layer serves to protect the outer covering from external shocks and scratches, and the protective layer may be at least one selected from the group consisting of polyethylene terephthalate (PET), nylon resin, and polypropylene (OPP).

In addition, the present application provides a vacuum insulation material using the vacuum insulation material.

The vacuum insulation material includes a core material and an adsorbent (getter). The vacuum insulation material is encapsulated by the vacuum insulation material and the encapsulation material through a known method, and is made of glass fiber, glass wool, polyurethane, polypropylene, It may contain more than one kind of core material and sorbent material.

Hereinafter, the present application will be described in more detail with reference to specific examples. However, the embodiments are only illustrative of the present application and the scope of the present application is not limited to the scope of the embodiments.

[Example]

Production Example 1: Production of laminated material for vacuum insulation panel sheathing material

(1) Preparation of metal barrier layer and non-metal barrier layer

A metal barrier layer was prepared by depositing aluminum having an optical density of 4.0 to form a thin film of about 30-40 nm or less on the surface of a substrate layer (polyester, polyolefin, polyamide, etc.).

(Bentonite, exfoliated graphite, vermiculite, or the like) is arranged as an organic material to form a thin film of about 0.5 탆 or less on the upper surface of a substrate layer (polyester, polyolefin, polyamide, etc.) A first nonmetal barrier layer was prepared.

Further, a thin film having a thickness of about 0.5 占 퐉 or less was formed on the upper surface of a substrate (polyester, polyolefin, polyamide or the like) by arranging an inorganic material (aluminum oxide or metal oxide) to prepare a second nonmetal barrier layer.

3 to 4 g / m < ² > of a polyurethane-based adhesive was applied between the metal barrier layer and the first and second nonmetal barrier layers, and then laminated from the top in the order of the metal barrier layer, the first and second nonmetal barrier layers.

(2) Formation of a thermal adhesive layer

Wherein one of a film selected from the group consisting of a polyolefin-based resin, an ethylene-vinyl acetate (EVA) resin and a methacrylate-methylethylene copolymer resin is applied to the bottom of the second nonmetal barrier layer at a coating amount of 3 to 4 g / m ² And then a heat-bonding layer was formed.

Experimental Example 1: Measurement of Oxygen Permeability

The oxygen permeability was measured with the first and second nonmetal barrier layers prepared in Production Example 1 and the laminate of Production Example 1 under conditions of a temperature of 23 캜 and a relative humidity of 0% RH.

As a result, the first and second non-metallic barrier layer has been found that the oxygen transmission rate 0.5cc / m ² / day and less than, the layered material while the oxygen transmission rate is 0.01cc / m ² / day is less than it was confirmed that the oxygen barrier effect.

Experimental Example 2: Measurement of water permeability

The moisture permeability of the laminate of Production Example 1 was measured according to ASTM F-1249 method, using a MOCON 3/33 apparatus.

As a result, it was confirmed that the laminated material of Production Example 1 had a water permeability of less than 0.01 g / m 2 / day and thus had moisture blocking effect.

Production Examples 2 and 3: Preparation of vacuum insulation material and vacuum insulation material

A protective layer was formed of polyethylene terephthalate resin on the metal vapor deposition layer of the laminate for vacuum insulation panel material manufactured in Production Example 1 to prepare a vacuum insulation panel cover material (Production Example 2).

Then, a vacuum insulation panel envelope material of Production Example 2 was obtained through a known method, and a vacuum insulation panel comprising at least one core material selected from glass fiber, glass wool, polyurethane, polypropylene and polyester and a getter material, (Production Example 3).

Experimental Example 3: Evaluation of Thermal Conductivity and Thermal Shock

Vacuum thermal insulation material was prepared from the vacuum insulation material of Production Example 3, and thermal conductivity was measured after the initial thermal conductivity was measured and stored for 6 weeks under accelerated test conditions (temperature 80 ° C, 65% RH). The change of the thermal conductivity before and after the acceleration test was less than 2.5 mW / mK, and it was confirmed that the conventional metal deposition layer implements the same performance as that of the envelope including three layers.

The laminated material for a vacuum insulation material of the present invention has the effect of minimizing the difference in thermal conductivity and thermal conductivity before and after the thermal shock due to minimization of the metal deposition layer as compared with the conventional laminated material for a vacuum insulation material.

The present application also has the effect of providing a vacuum insulator shell material including the above laminate.

Claims (8)

A metal barrier layer including a base layer on which a metal deposition layer is formed; At least one non-metallic barrier layer comprising a substrate layer on which a thin film layer is formed, the substrate layer comprising a moisture and gas barrier material comprising at least one of an organic material and an inorganic material; And A non-metallic barrier layer comprising a thermally adhesive layer at the bottom of the laminate for a vacuum insulation panel sheathing material. The method according to claim 1, Wherein the organic material is at least one selected from the group consisting of ethylene vinyl alcohol, polyvinyl alcohol, and nano-clay, and the inorganic material is at least one selected from the group consisting of silicon oxide and aluminum oxide Or more, laminated material for vacuum insulation material. The method according to claim 1, Wherein the thickness of the thin film layer is 0.1 占 퐉 to 1 占 퐉. The method according to claim 1, Wherein the base layer of the metal barrier layer and the base layer of the nonmetal barrier layer each independently comprise at least one of polyester, polyolefin, and polyamide. The method according to claim 1, Wherein the non-metallic barrier layer comprises a first non-metallic barrier layer and a second non-metallic barrier layer. The method of claim 5, Wherein the gas barrier material of the first non-metallic barrier layer comprises an organic material, Wherein the gas barrier material of the second nonmetal barrier layer comprises an inorganic material. The method according to claim 1, Wherein the heat-adhesive layer comprises at least one of a polyolefin-based resin, an ethylene-vinyl acetate copolymer (EVA) resin, and a methacrylate-methylethylene copolymer resin. A vacuum insulation panel sheathing material using the laminate for a vacuum insulation panel sheathing material according to any one of claims 1 to 7.