KR20200086844A - Vacuum Insulation Panel Impregnated with Hollow Glass Microsphere into Glass-Fiber Core - Google Patents

Abstract

The present invention provides a vacuum insulation panel for impregnating a glass fiber core with a hollow glass microsphere (HGM), which impregnates the glass fiber core which is an inner structure of the insulation panel with the HGM to efficiently improve insulation performance of the panel while maintaining inner pressure. To this end, the vacuum insulation panel for impregnating a glass fiber core with an HGM includes: a panel main body part having a core formed in a porous state to be formed in a decompressing state therein and an outer cover material surrounding an outer surface of the core to seal the same and compressing the core in a high vacuum state of being blocked from the outside; a getter part adsorbing remaining gas and moisture to maintain constant pressure in the panel main body part; and a plurality of HGM beads integrally coupled and formed into the core of the panel main body part and forming fine particles in a glass material which are hollow therein.

Description

Vacuum Insulation Panel Impregnated with Hollow Glass Microsphere into Glass-Fiber Core}

The present invention relates to a vacuum insulating panel impregnated with HGM in a glass fiber core, and more specifically, insulating the panel while maintaining the internal pressure by impregnating a glass fiber core, which is an internal component of the insulating panel, with HGM (Hollow Glass Microsphere). It relates to a vacuum insulating panel impregnated with HGM in a glass fiber core capable of efficiently improving performance.

Vacuum insulation material is commonly called VIP (Vacuum Insulation Panel), and as shown in [Fig. 1], as a high-performance insulation material having a thermal conductivity value of 0.0045 W/mK or less by vacuuming the inside of the insulation material below 1 mbar to maximize insulation performance, It is a heat insulating plate that has about 8 times better heat insulation performance than the existing heat insulation materials for buildings with thermal conductivity of 0.031~0.045 W/mK.

These vacuum insulation materials have been mainly used for electronic products such as household refrigeration and refrigeration equipment, and Japan has millions of panels per year, accounting for more than 50% of the vacuum insulation panel market for international home appliances, and the vacuum insulation panel market in Japan is growing rapidly. However, vacuum insulation panels for buildings are still in the research stage and have limited market in some European countries such as Germany and Switzerland. Although some countries have technologies related to products and manufacturing of vacuum insulating panels, the application of buildings has not yet been activated despite the high efficiency of insulating materials due to problems such as maintaining the vacuum of the insulating panels and thermal bridges of the joints. .

From 2001 to 2004, the European Energy Agency (IEA) ECBCS Annex 39'HiPTI-High Performance Thermal focused on European countries such as Switzerland (EMPA), France (CSTB), Netherlands (TU Delft), and Germany (ZAE-Bayern). Insulation' international joint research project has been conducted on vacuum insulation panels for buildings. Through this project, a study was conducted on the case of applying vacuum insulation panels to actual buildings to apply vacuum insulation panels to various places such as floors, roofs, terraces, non-bearing wall sandwich panels, railings, terraces, and prefabricated sheaths. Problems and precautions of vacuum insulation panels for application were presented.

The vacuum insulation panel is not a general insulation material, but can be viewed as a building insulation system based on materials and characteristics such as the core material, core back, and installation method of the vacuum insulation panel. For this reason, the panel insulation or vacuum insulation depending on the installation method in the building A thermal bridge is generated from the panel and affects the overall thermal performance of the building envelope. That is, as shown in [Fig. 2], the insulation performance of the building envelope to which the vacuum insulation panel is applied depends on the configuration method of the vacuum insulation panel, such as the boundary layer between the panel and the panel, spacers and joiners, and the installation method using existing building materials. It depends on the structural thermal bridge. In particular, the thermal bridge effect varies depending on the material and thickness surrounding the core bag in the vacuum insulating panel itself and the thickness of the vacuum insulating panel, and affects the insulation performance.

In terms of commercialization, vacuum insulation panels are most actively commercialized in Germany with R&D, and the US, China, and Korea are introducing related products to the market. Commercialized products of major vacuum insulation panels are distributed through German manufacturers such as va-Q-tec and Porotherm. Especially, vacuum insulation panels of va-Q-tec in Germany are the first vacuum insulation panels from the German Institute of Architecture and Technology (DIBT). Acquired building material approval.

In domestic industry, OCI using fumed silica, KCC using glass wool, and LG Hausys, etc., based on the core material used inside the vacuum insulation panel, currently research and develop or commercialize vacuum insulation materials to build and vacuum domestic and foreign markets It can be said that the standardization of insulation and verification of performance are necessary. In addition, in Europe and Japan, such as Germany and Switzerland, the development and diffusion of vacuum panels for construction are rapidly increasing.

Buildings play an important role in reducing national greenhouse gases and building low-carbon society internationally, and building applications of high-efficiency insulation materials such as vacuum insulation panels are expanding due to energy efficiency improvement and policy implementation for the distribution of zero-energy buildings. Accordingly, it is necessary to develop technology for the performance and verification of vacuum insulation panel products for buildings in consideration of the specificity of using vacuum technology for buildings.

In recent years, as the demand for high-efficiency insulation materials has increased due to the strengthening of energy efficiency standards of buildings, green remodeling, and the spread of zero-energy buildings, technology development for vacuum insulation panels has been actively conducted and commercialized. Therefore, in order to expand the related industries through product performance and quality assurance, the establishment of standard standards for vacuum insulation panels for buildings has increased interest both at home and abroad, and for this, research on performance verification for building applications of vacuum insulation panels has been conducted. It is actively taking place.

Currently, the relevant standard of vacuum insulation panel is American ASTM (C1484-10; Standard specification for VIPs) standard. In addition, in Germany and Japan, vacuum insulation panel is applied according to the standards related to building materials of DIN and JIS. Doing. ASTM's C1484-10 standard is a separate standard for vacuum insulated panels rather than existing vacuum insulators, and defines the test methods for physical and mechanical properties of vacuum insulated panels. Therefore, standard effective heat resistance conditions and requirements for vacuum insulation panels are presented, and test items and methods are specified. Meanwhile, preparations have been made for the establishment of international standards for the application of vacuum insulation panels in the past few years, and international standard standards for vacuum insulation panels have been established under ISO TC163.

On the other hand, if the current trend of increase in building energy consumption (2.6% increase per year) continues, the building energy consumption in 2030 is estimated to increase to 34% of total energy consumption, and the continuous increase in buildings (estimated to increase more than 5 million by 2020) and Considering the increase in consumption in the cooling and home appliance sectors (an estimated 1.8x increase from 2000 in 2020), efforts to reduce energy consumption in buildings are urgently needed.

Recently, zero energy and green remodeling buildings have been introduced internationally, and many efforts have been made to minimize energy consumption in the building and produce energy to make the building self-reliant. In particular, high-performance insulation jackets in buildings should be considered first for zero-energy buildings. Therefore, in order to minimize the energy loss of the building envelope, advanced high-performance envelope insulation technology is required.

The share of residential and commercial buildings in the country's total energy consumption is about 22.3%, and this rate is gradually increasing. Accordingly, the government is making efforts to strengthen the standard for insulation of exterior walls of buildings. In order to satisfy the reinforced insulation standards, an increase in the insulation thickness is inevitable, and an increase in the insulation thickness leads to a decrease in the space occupied by the room. Therefore, applying high-performance insulation materials to buildings can be a more effective method for zero-energy buildings.

Vacuum insulation panels have long been used in refrigerators and refrigerators, and their application in buildings began only a few years ago. The vacuum insulation panel has a high thermal insulation performance of 5 to 8 times as compared to the existing thermal insulation material, even considering the loss due to the thermal bridge, and as shown in [FIG. 3], it can be applied as a high-performance thermal insulation sheath with a thin insulation layer. In addition, as shown in Figure 4, a graph showing the insulation thickness required to achieve a different heat permeability (U-value, (W m-2K-1)) of the existing heat insulating material and the vacuum insulation panel having different thermal conductivity. The insulation panel is about 6 times thinner than the existing ESP, rockwool, and glass fiber insulation, and can achieve a U-value of 0.1 to 0.2.

As a conventional technique disclosed in connection with the vacuum insulating panel as described above, Korean Patent Registration No. 753720 (2007.08.30.) is a vacuum insulation material containing a core material made of a fiber polymer in an outer shell material having gas barrier properties, The inside of the outer cover material is provided with a rectangular fiber polymer without a binder, a lead-shaped fiber polymer without a binder, and an inner wrapper surrounding the lead-shaped fiber polymer, wherein the inner wrapper includes the As the inside of the outer cover material is reduced in pressure and configured to be in a vacuum state, a vacuum insulation material is known that can improve the handleability of the core material and reduce the cost.

In addition, the registered patent publication No. 1820373 (2018.01.15.) includes a core material comprising at least one selected from glass fiber, glass wool, polyurethane, polypropylene and polyester; An outer covering material for vacuum-packing the core material; And a foam formed on the outer surface of the outer covering material, and the bonding portion between the silane layer and the foam of the outer covering material is heat-sealed and chemically bonded, and thus the workability is very excellent as the outer material and the foam are configured to be integrated. Construction vacuum insulation panels are known that can prevent the generation of environmental hormones and increase the effective space inside.

However, in the case of the prior art described above, since the internal pressure in the insulating panel continues to rise over time, there is a problem that the thermal conductivity increases and eventually the long-term performance decreases.

Furthermore, in the prior art, when a glass fiber is used as a core material for a vacuum insulation panel, the internal pressure increases over time, although the initial thermal conductivity is lower than that of a vacuum insulation panel to which other core materials are applied, resulting in an increase in thermal conductivity and thermal insulation performance. There was a problem that the drop was larger than that of a vacuum insulating panel composed of other core materials.

Accordingly, there is a need for research and development to secure long-term performance while improving insulation performance reduction over time with respect to thermal conductivity of a vacuum insulating panel in which a glass fiber is applied as a core material.

KR Registered Patent Publication No. 10-0753720 (2007.08.30.) KR Registered Patent Publication No. 10-1820373 (2018.01.15.)

The present invention is to solve the problems as described above, while applying a glass fiber to the core of a vacuum insulating panel, and impregnated with a HGM (Hollow Glass Microsphere) additive in the form of a bead in the core material, as the vacuum insulating panel passes over time An object of the present invention is to provide a vacuum insulating panel impregnated with HGM in a glass fiber core that can minimize an increase in thermal conductivity and minimize a decrease in thermal insulation performance.

The vacuum insulating panel impregnated with HGM in the glass fiber core material proposed by the present invention is a core core material that is formed to be porous to form a depressurized state inside, and is sealed by wrapping the outer surface of the core core material and sealing the core core material but being blocked from the outside. A panel body part having an outer covering material compressed in a state; A getter unit that adsorbs residual gas and moisture to maintain a constant pressure in the panel body unit; And a plurality of HGM beads which are integrally formed in the core core of the panel body part and constitute fine particles of a hollow glass material.

The core core material of the panel body part is made of glass fiber having an initial low thermal conductivity, and the shell material of the panel body part forms a double composite shape on the outer surface of the core core material, and aluminum foil and laminated film are sequentially stacked. do.

The HGM beads are made of fine particles having a diameter of 0.1 to 30 μm, and the HGM beads are formed by impregnation on the core core, followed by heat and pressure.

According to the vacuum insulating panel impregnated with HGM in the glass fiber core material according to the present invention, it is composed of a structure that is impregnated with heat and pressure after impregnating HGM beads in the core core material of the panel body portion compressed in a vacuum state. While maintaining the internal pressure in the vacuum state, the increase in thermal conductivity is reduced, and the thermal insulation performance of the product is continuously maintained, and the effect of securing excellent long-term performance is obtained.

1 is a view showing a conceptual diagram and detailed components of a general vacuum insulation panel.
Figure 2 is a photograph showing an example of a two-dimensional analysis of the thermal bridge according to the installation method of a typical vacuum insulation panel.
Figure 3 is a picture of a commercially available VIPs (left) and glass wool and vacuum insulation panels (right).
Figure 4 is a graph according to the thermal conductivity of the heat insulating material for the same heat transmission rate.
Figure 5 is a cross-sectional view schematically showing an embodiment according to the present invention.
Figure 6 is an enlarged picture of the core core and HGM beads in one embodiment according to the present invention.

The present invention is a panel body portion having a core material formed to be porous to form a depressurized state therein, and a shell material surrounding the outer surface of the core material and sealing, but compressing the core material in a high vacuum state blocked from the outside; A getter unit that adsorbs residual gas and moisture to maintain a constant pressure in the panel body unit; A plurality of HGM beads that are integrally formed in the core core of the panel body part and constitute fine particles of a hollow glass material; a vacuum insulating panel impregnated with HGM in a glass fiber core comprising a feature of the technology.

Next, a preferred embodiment of a vacuum insulating panel impregnated with HGM in a glass fiber core according to the present invention will be described in detail with reference to the drawings.

First, an embodiment of the vacuum insulating panel 100 impregnated with HGM in the glass fiber core according to the present invention, as shown in FIG. 5, the panel body portion 110, the getter portion 120 and the HGM bead 130 It is made including.

The panel main body 110 is configured to include a core core 111 that is a component for internal insulation, and a shell material 113 that is a component for external insulation.

The core core 111 is formed in the shape of a rectangular parallelepiped to form the overall shape of the vacuum insulating panel 100, and is formed to form an internal depressurized state.

In the above, the core core 111 is formed through a pre-treatment process (for example, a press or needle punch method) to reduce the size and volume while shaping the shape of the overall rectangular parallelepiped.

The core core 111 is constructed using a porous material, but constitutes the core core 111 using a glass fiber having a low initial thermal conductivity.

Since the core core 111 is constructed using a glass fiber, it is possible to create an initial low thermal conductivity, and reinforce the thermal conductivity increase and thermal insulation performance deterioration caused by the HGM beads 130 over time.

The outer cover material 113 wraps the outer surface of the core core 111 and seals it from the outside while exerting an external heat insulating function.

The shell material 113 is compressed to form a high vacuum state in which the core core 111 is blocked from the outside. That is, since the outer shell material 113 seals and compresses the core core 111 in a vacuum state therein, it blocks moisture permeability and air permeability so that internal temperature, external air, and moisture do not flow inside.

In the above, the inner vacuum degree of the sheathing material 113 toward the core core 111 is configured to form 10 ^-5 to 10 ^-2 Torr.

The outer shell material 113 is a structure in which the core core material 111 is formed in a double-complex form on the outer surface and sequentially stacked, and the aluminum foil 113a is wrapped in direct contact with the outer surface of the core core material 111. The laminated film (113b) to wrap the aluminum foil (113a) again constitutes.

In the above, the aluminum foil 113a and the laminated film 113b are sequentially heat-pressed, respectively, to form an integral part on the core core 111.

The getter part 120 adsorbs gas and moisture remaining inside the vacuum state of the panel body part 110 so as to maintain a constant pressure in the panel body part 110.

The getter part 120 is inserted into the core core 111 and forms a block-like cuboid shape.

The getter unit 120 may be configured using calcium oxide (CaO) and zeolite, which can exhibit adsorption performance. Also, the getter unit 120 may include at least one of BaLi, CoO, and CaO for absorbing oxygen, hydrogen, nitrogen, carbon dioxide, and water vapor.

The HGM beads 130 perform a function of maintaining thermal insulation performance together with the core core 111 in a vacuum state.

The HGM bead 130 forms a hollow bubble shape and is constructed using a glass material.

Since the HGM beads 130 do not act as pressure as the air is trapped in the hollow interior space, the overall volume and internal pressure rise even when the temperature increases by the amount of the HGM beads 130 included in the vacuum insulating panel 100. It is possible to be less affected.

The HGM beads 130 are formed of fine particles, but are formed of fine particles having a diameter of 0.1 to 30 μm. In more detail, the HGM beads 130 are constructed by mixing nanoparticles of 0.1 to 1.0 μm and microparticles of 1.0 to 30 μm.

In the above, as HGM beads 130, nanoparticles of HGM beads 130 and microparticles of HGM beads 130 are applied at a ratio of 2 to 4:6 to 8 to have a uniform distribution on the core core 111. Make up.

6, the HGM beads 130 are integrally formed in the core core 111 of the panel main body 110. As shown in FIG.

The HGM beads 130 are integrally formed on the core core 111, but are formed by impregnating the HGM beads 130 on the core core 111 and applying heat and pressure to form a mutually coupled structure.

Hereinafter will be described in detail by examples and comparative examples according to the present invention.

[Evaluation of thermal conductivity of vacuum insulation panels before and after accelerated aging]

In order to compare and evaluate the optimum design and thermal conductivity of the vacuum insulating panel 100, the core core 111 of the panel body portion 110 is woven into a sheet having a weight of 50 g/m 2 and a thickness of 5 mm, and then covered with a shell. Vacuum compression was performed with ash 113, and at this time, about 10% of the total HGM beads 130 in the core core 111 were impregnated, and then heat and pressure were applied to produce a vacuum insulation panel (Example 1).

On the other hand, to prepare a vacuum insulating panel 100 consisting of the core core 111 and the outer shell material 113 of the panel body portion 110, the HGM beads (in the core core 111 of the vacuum insulating panel 100) ( 130) was prepared without a vacuum insulation panel (Comparative Example 1).

The vacuum insulating panels of Example 1 and Comparative Example 1 prepared above were all subjected to an accelerated aging experiment after being left at a temperature condition of 80° C. for 8 days, and the performance of the vacuum insulating panels was measured by measuring the thermal conductivity before and after each accelerated aging. The degradation was compared and analyzed, and the results are shown in Table 1 below.

% of additives in
core materials Initial thermal
conductivity (W/mK) Aging thermal
conductivity (W/mK) Example 1 10% 0.002 0.0031 Comparative Example 1 - 0.002 0.0052

As a result of measuring the thermal conductivity before and after the accelerated aging experiment as described above, it can be seen that both the thermal conductivity in Example 1 and Comparative Example 1 increased after the experiment than before, and the HGM beads in the core core of the vacuum insulation panel were combined. Since the thermal conductivity of Example 1 is lower than the thermal conductivity (0.0052) of Comparative Example 1 in which HGM beads are not combined, the increase in thermal conductivity due to accelerated aging of Example 1 is lower, so the time in the vacuum insulating panel of the present invention has passed. It was analyzed that the increase in thermal conductivity is small due to the long-term performance of the vacuum insulation panel.

That is, according to the vacuum insulating panel impregnated with HGM in the glass fiber core material according to the present invention configured as described above, the core material of the panel body compressed in a vacuum state is impregnated with HGM beads, and is configured to be combined by heat and pressure. , It is possible to reduce the increase in thermal conductivity while maintaining the internal pressure in a vacuum over time, to maintain the thermal insulation performance of the product, and to secure excellent long-term performance.

In the above, a preferred embodiment of a vacuum insulating panel impregnated with HGM in a glass fiber core according to the present invention has been described, but the present invention is not limited to this, and various aspects within the scope of the claims and the specification of the invention and the accompanying drawings. It is possible to carry out by modifying to, this also falls within the scope of the present invention.

100: vacuum insulation panel 110: panel body
111: core core 113: outer shell material
113a: aluminum foil 113b: laminated film
120: getter unit 130: HGM bead

Claims (4)

A panel main body having a core core formed porous to form a depressurized state therein, and an outer shell material surrounding the outer surface of the core core and sealing the core core material in a high vacuum state blocked from the outside;
A getter unit that adsorbs residual gas and moisture to maintain a constant pressure in the panel body unit;
A vacuum insulating panel impregnated with HGM in a glass fiber core comprising; a plurality of HGM beads forming integrally formed inside the core core of the panel body portion and forming fine particles of a hollow glass material.
The method according to claim 1,
The core core material of the panel body portion, a vacuum insulating panel impregnated with HGM in a glass fiber core material, characterized in that consisting of a glass fiber (Glass Fiber) having an initial low thermal conductivity.
The method according to claim 1,
The outer shell material of the panel main body is a vacuum insulation panel in which HGM is impregnated into a glass fiber core material that is formed in a double-composite shape on the outer surface of the core core material, and that aluminum foil and laminated film are sequentially laminated.
The method according to claim 1,
The HGM beads are made of fine particles having a diameter of 0.1 to 30 μm,
The HGM beads are impregnated on the core core, and then heat and pressure are applied to form a bond.

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