KR100329475B1 - Vacuum adiabatic panel and manufacturing method thereof - Google Patents
Vacuum adiabatic panel and manufacturing method thereof Download PDFInfo
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- KR100329475B1 KR100329475B1 KR1019980020966A KR19980020966A KR100329475B1 KR 100329475 B1 KR100329475 B1 KR 100329475B1 KR 1019980020966 A KR1019980020966 A KR 1019980020966A KR 19980020966 A KR19980020966 A KR 19980020966A KR 100329475 B1 KR100329475 B1 KR 100329475B1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
- B29C44/5681—Covering the foamed object with, e.g. a lining
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/001—Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/046—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of foam
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
- B32B37/1018—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure using only vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/304—Insulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2607/00—Walls, panels
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Thermal Insulation (AREA)
- Refrigerator Housings (AREA)
Abstract
본 발명은 진공단열판넬과 그 제조방법에 관한 것으로, 본 발명의 진공단열판넬은 몰드에 의하여 발포된 후 스킨층이 제거된 연속기포 구조를 가지는 개방셀 폴리우레탄 발포체, 발포체의 외면을 감싸는 금속 라미네이트 필름, 발포체 내부의 가스를 흡착하여 진공상태를 유지시키는 가스흡착제를 구비하며, 기포간 공극거리가 80 - 100㎛ 정도가 되도록 단열방향에 대하여 수직방향으로 폴리우레탄을 발포하여 제조된다. 이러한 본 발명에 따른 진공단열판넬은 수직몰드 발포방식에 의하여 균일한 물성 및 성능을 가지는 경질 폴리우레탄을 산업적으로 저렴한 제조비용으로 제조할 수 있고, 또한 성능이 균일하고 가격적으로 저렴한 심재를 적용함으로써 단열성능이 우수하고, 가격적으로 저렴한 진공단열판넬의 제조가 가능한 효과가 있다.The present invention relates to a vacuum insulation panel and a method for manufacturing the same, the vacuum insulation panel of the present invention is an open-cell polyurethane foam having a continuous bubble structure of the skin layer is removed after the foamed by the mold, the metal laminate surrounding the outer surface of the foam The film is provided with a gas adsorbent for adsorbing gas inside the foam to maintain a vacuum state, and is produced by foaming polyurethane in a direction perpendicular to the adiabatic direction such that the pore distance between bubbles is about 80-100 μm. The vacuum insulation panel according to the present invention can manufacture a rigid polyurethane having uniform properties and performance by the vertical mold foaming method at an industrially low manufacturing cost, and also by applying a core material with uniform performance and low cost Excellent heat insulation performance, it is possible to manufacture a low-cost vacuum insulation panel.
Description
본 발명은 진공단열판넬과 그 제조방법에 관한 것으로, 더욱 상세하게는 수직발포에 의하여 균일한 물성 및 성능을 가지는 경질 우레탄 발포체을 산업적으로 저렴한 제조비용으로 제조할 수 있도록 한 진공단열판넬과 그 제조방법에 관한 것이다.The present invention relates to a vacuum insulation panel and a method for manufacturing the same, and more particularly, a vacuum insulation panel and a method for manufacturing the rigid urethane foam having a uniform physical properties and performance by vertical foaming at an industrially low manufacturing cost It is about.
최근 세계적으로 지구 온난화와 화석연료가 고갈됨에 따라 이산화탄소의 배출량의 감소와 에너지 사용을 줄이려는 움직임이 선진국을 중심으로 확산되고 있다. 따라서 냉장고 업계에서는 에너지 절감이 큰 이슈로 대두됨에 따라 대책 마련에 부심하고 있는 설정이다.As global warming and fossil fuels are depleted in recent years, the movement to reduce carbon dioxide emissions and reduce energy use is spreading in developed countries. Therefore, in the refrigerator industry, energy saving is a big issue, and the government is trying to prepare a countermeasure.
따라서 이와 같은 규제에 대응하는 방안의 일부로 단열성능을 획기적으로 향상시켜 주는 진공단열판넬이 일본 및 유럽을 중심으로 각광받고 있다. 일본의 경우는 샤프사 및 산요사에서 냉장고 일부 기종에 진공단열판넬을 적용하여 소비에너지 절감 및 내용적을 확대시킨 제품을 출시 중에 있다. 또한 유럽에서도 진공단열판넬을 적용한 냉장고를 보쉬-지멘스사와 몇 개 회사에서 출시 중에 있다.Therefore, a vacuum insulation panel that dramatically improves the thermal insulation performance as part of the countermeasures against such regulations has been spotlighted in Japan and Europe. In Japan, Sharp and Sanyo are launching products that reduce energy consumption and expand the capacity by applying vacuum insulation panels to some refrigerators. In Europe, refrigerators with vacuum insulation panels are also available from Bosch-Siemens and several companies.
일반적으로 진공단열판넬은 충진된 심재에 따라 실리카 충진형, 개방셀 경질 폴리우레탄 발포체 충진형, 개방셀 폴리스티렌 발포체 충진형, 유리솜 충진형으로 구분된다.In general, the vacuum insulation panel is divided into silica filled type, open cell rigid polyurethane foam filled type, open cell polystyrene foam filled type, and glass wool filled type according to the filled core material.
실리카 충진형은 제조시 분진발생으로 환경문제가 있고 무게가 무겁기 때문에 사용이 제한되고 있으며, 유리솜 충진형은 제조비용이 많이 드는 문제점이 있으며, 개방셀 폴리스티렌 발포체 충진형은 대량생산이 용이하고 경제성은 있으나 수분건조시 시간이 많이 걸리는 문제와 냉장고에 적용시 진공단열판넬이 수축하는 문제점을 지니고 있으며, 개방셀 경질 폴리우레탄 발포체 충진형은 실리카 충진형에 비하여 무게가 1/3 수준이며 대량생산이 용이하기 때문에 이를 적용하려는 업체가 늘어나고 있다.Silica filling type has limited environmental problems due to dust generation and heavy weight in manufacturing, and glass wool filling type has a problem of high manufacturing cost, and open cell polystyrene foam filling type is easy to mass production and economical However, it has a problem that it takes a long time when drying the moisture and the vacuum insulation panel shrinks when applied to the refrigerator. The open cell rigid polyurethane foam filling type is 1/3 of the weight compared to the silica filling type and is easy to mass-produce. Because of this, more companies are trying to apply it.
이와 같이, 냉장고 및 냉동기기 단열재의 열절연 특성을 개선하기 위하여 감소된 내부압력을 갖는 진공단열판넬은 금속 라미네이트 필름의 진공용기에 동봉된 심재로 구성되어 있다. 이러한 진공단열판넬에서 아이씨아이(ICI) 폴리우레탄사에서 개발한 진공단열판넬은 100% 개방셀 경질 폴리우레탄 발포체를 심재로 하여 외부에 고진공용 필름을 입히고, 내부를 0.05 - 0.1 mbar 까지 감압시켜 열전도율이 기존의 경질 폴리우레탄 발포체의 열전도율인 약 0.015 - 0.020kcal/mhr℃ 보다 월등히 향상된 약 0.0060kcal/mhr℃ 정도의 열전도율을 가지고 있다.Thus, in order to improve the thermal insulation properties of the refrigerator and freezer insulation, the vacuum insulation panel having a reduced internal pressure is composed of a core material enclosed in the vacuum container of the metal laminate film. In this vacuum insulation panel, the vacuum insulation panel developed by ICI Polyurethane Co., Ltd. is made of 100% open cell rigid polyurethane foam and coated with high vacuum film on the outside, and the inside is decompressed to 0.05-0.1 mbar. The thermal conductivity of the conventional rigid polyurethane foam is about 0.0060 kcal / mhr ° C, which is significantly improved from about 0.015-0.020 kcal / mhr ° C.
그러나 100% 개방셀 경질 폴리우레탄 발포체를 충진한 진공단열재는 재료비 및 제조공정비 상승 등의 요인으로 기존의 경질 폴리우레탄 발포체에 비하여 단열성능이 2 - 3배 우수하지만 가격이 비싸 냉장고 및 냉동기기에 적용시 걸림돌이 되고 있다.However, the vacuum insulation material filled with 100% open cell rigid polyurethane foam has 2 ~ 3 times better thermal insulation performance than existing rigid polyurethane foam due to factors such as material cost and manufacturing process cost increase. City has become a stumbling block.
이를 해결하기 위하여 근래에는 진공단열재의 심재로 사용하는 100% 개방셀 경질 폴리우레탄 발포체 제조시 발포체로 사용하는 휘발성이 강한 저비점의 유기용제를 사용하지 않고, 물만을 사용하고 발포체를 더블 콘베이어에 의하여 대량생산함으로써 제조가를 낮추고 성능 및 물성이 균일한 발포체 제조방법을 제시하였다.In order to solve this problem, in recent years, 100% open-cell rigid polyurethane foam, which is used as a core material of vacuum insulation material, does not use a highly volatile low-boiling organic solvent, which is used as a foam, and uses only water and a large amount of foam by a double conveyor. By lowering the production price and producing a uniform foam performance and physical properties have been proposed.
이러한 진공단열판넬을 냉장고에 적용시에는 진공단열재의 두께에 따라 철판과 내상 사이에 우레탄 액을 채울 때 액의 흐름성에 큰 영향을 미치게 된다. 따라서 진공단열판넬을 냉장고에 보다 쉽게 적용하기 위해서는 단열성능이 우수하고 두께가 얇은 진공단열판넬을 제공하는 것이 중요하다.When the vacuum insulation panel is applied to a refrigerator, when the urethane liquid is filled between the iron plate and the inner phase according to the thickness of the vacuum insulation material, the flowability of the liquid is greatly affected. Therefore, in order to apply the vacuum insulation panel to the refrigerator more easily, it is important to provide a vacuum insulation panel having excellent heat insulating performance and a thin thickness.
그러나 이전의 기술에서는 안정적인 가격의 100% 개방셀 폴리우레탄 발포체는 수평몰드방식을 적용하여 전체적으로 균일한 물성을 가지는 발포체를 생성할 수 있지만, 발포체를 이용하여 진공단열판넬 제조시 단열방향으로의 셀공극을 150㎛ 이하로 줄이는 데는 한계가 있어 0.0070kcal/mhr℃ 이하의 단열성능을 가진 진공단열판넬을 얻을 수 없고, 또한 이를 냉장고에 적용시 소비전력면에서 크게 개선된 결과를 보여주지 못함에 따라 사용에 제한이 따르게 된다.However, in the previous technology, 100% open-cell polyurethane foam with stable price can produce foams with uniform physical properties by applying horizontal molding method, but cell voids in adiabatic direction when manufacturing vacuum insulation panels using foams Is limited to less than 150㎛, it is not possible to obtain a vacuum insulation panel with a thermal insulation performance of less than 0.0070kcal / mhr ℃, and also because it does not show a significant improvement in power consumption when applied to a refrigerator There will be restrictions.
본 발명은 상기의 문제점을 해결하기 위한 것으로, 본 발명의 목적은 단열성능이 우수한 진공단열판넬의 심재로 사용하는 100% 개방셀 폴리우레탄 발포체를 수직몰드방식에 의하여 열전달 방향 기포막간의 공극거리를 줄여 보다 단열성능이 우수하며 두께를 얇게 할 수 있는 진공단열판넬과 그 제조방법을 제공하는 것이다.The present invention is to solve the above problems, an object of the present invention is to 100% open cell polyurethane foam used as a core material of the vacuum insulation panel excellent in thermal insulation performance by the vertical molding method of the gap distance between the bubble film in the heat transfer direction It is to provide a vacuum insulation panel and a method of manufacturing the same that can be reduced in thickness and excellent insulation performance.
도 1은 본 발명에 따른 진공단열판넬을 보인 단면도이다.1 is a cross-sectional view showing a vacuum insulation panel according to the present invention.
도 2는 본 발명의 수직몰드를 보인 사시도이다.2 is a perspective view showing a vertical mold of the present invention.
도 3은 본 발명의 수직몰드에 의하여 발포된 진공단열판넬의 셀배향을 보인 도면이다.Figure 3 is a view showing the cell orientation of the vacuum insulation panel foamed by the vertical mold of the present invention.
도 4는 본 발명에 따른 진공단열판넬의 제조단계를 나타낸 제조공정도이다.Figure 4 is a manufacturing process showing the manufacturing step of the vacuum insulation panel according to the present invention.
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
10...진공단열판넬 11...발포체10 ... vacuum insulation panel 11 ... foam
12...금속 라미네이트필름 13...가스흡착제12.Metal Laminate Film 13 ... Gas Adsorbent
14...셀14 ... cell
전술한 목적을 달성하기 위하여 본 발명은, 몰드에 폴리우레탄이 발포되어 소정의 열전도도를 가지는 발포체를 구비한 진공단열판넬과 그 제조방법에 있어서, 상기 몰드에 폴리우레탄의 발포는 단열방향에 대해 수직방향이 되도록 하여서 단열방향에 대한 기포간 공극거리가 80 - 100㎛ 이하로 된 것을 특징으로 한다.In order to achieve the above object, the present invention is a vacuum insulation panel having a foam having a predetermined thermal conductivity by foaming polyurethane in a mold and a method of manufacturing the same, wherein the foaming of the polyurethane in the mold with respect to the heat insulation direction It is characterized in that the void distance between the bubbles in the adiabatic direction to be in the vertical direction of 80-100 μm or less.
이하에서는 도면을 참조하여 본 발명의 일실시예를 들어 본 발명의 진공단열판넬과 그 제조방법에 대하여 보다 구체적으로 설명하고자 한다. 본 발명은 이하의 실시예에 국한되지 않음은 물론이다.Hereinafter, an embodiment of the present invention with reference to the drawings will be described in more detail with respect to the vacuum insulation panel of the present invention and its manufacturing method. Of course, the present invention is not limited to the following examples.
도 1은 본 발명에 따른 진공단열판넬을 보인 단면도이고, 도 2는 본 발명의 수직몰드를 보인 사시도이다. 그리고 도 3은 본 발명의 수직몰드에 의하여 발포된진공단열판넬이 셀배향을 보인 도면이며, 도 4는 본 발명에 따른 진공단열판넬의 제조단계를 나타낸 제조공정도이다.1 is a cross-sectional view showing a vacuum insulation panel according to the present invention, Figure 2 is a perspective view showing a vertical mold of the present invention. And Figure 3 is a view showing the cell orientation of the vacuum insulation panel foamed by the vertical mold of the present invention, Figure 4 is a manufacturing process diagram showing the manufacturing step of the vacuum insulation panel according to the present invention.
본 발명의 도 1에 도시된 바와 같은 진공단열판넬은 도 4에 도시된 바와 같은 제조공정을 거쳐서 제조된다.The vacuum insulation panel as shown in FIG. 1 of the present invention is manufactured through a manufacturing process as shown in FIG.
이 제조단계는 수직몰드 방식을 이용하는데, 이는 몰드물(20)에 수직방향으로 우레탄폼을 발포하는 발포단계(S1)를 거치게 된다. 이에 따라 물성이 균일하고 열전달 방향 기포막간의 공극거리가 80 - 100㎛ 근처로 줄어든 경질 폴리우레탄 발포체(11)를 얻을 수 있다.This manufacturing step uses a vertical molding method, which is subjected to a foaming step (S1) of foaming urethane foam in a vertical direction to the mold 20. Thereby, the rigid polyurethane foam 11 can be obtained in which the physical properties are uniform and the pore distance between the heat transfer direction bubble films is reduced to around 80-100 μm.
그리고 상온에서 24시간 방치하고 난 후에 표면의 스킨층을 제거하는 스킨층 제거단계(S2)를 거치고, 발포체(11)를 절단하여 단열방향으로 셀(14) 크기가 작고 물성이 균일한 100% 개방셀 폴리우레탄 발포체(11)를 얻을 수 있도록 발포체(11)를 절단한 후, 가열기 등을 통한 수분제거단계(S3)를 거치게 된다.And after leaving at room temperature for 24 hours through a skin layer removing step (S2) to remove the skin layer on the surface, the foam 11 is cut to open the cell 14 in the adiabatic direction with a small size and uniform physical properties 100% open After cutting the foam 11 so as to obtain the cell polyurethane foam 11, it is subjected to a water removal step (S3) through a heater or the like.
그리고 발포체(11)의 절단 후 100% 개방셀 폴리우레탄 발포체(11)에 가스흡착제(13)를 삽입하는 가스흡착제 삽입단계(S4)와 계속해서 발포체(11)와 가스흡착제(13)를 고진공용 금속 라미네이트 필름(12)으로 감싸고 내부의 진공을 0.1 - 0.05mbar 까지 감압시키고 열융착을 하는 필름포장단계(S5)를 거치게 되면 최종적으로 단열성능이 우수한 진공단열판넬(10)을 얻을 수 있다.And after cutting the foam 11, the gas adsorbent insertion step (S4) for inserting the gas adsorbent 13 into the 100% open-cell polyurethane foam 11 and subsequently the foam 11 and the gas adsorbent 13 for high vacuum Wrapping with a metal laminate film 12, the vacuum inside the pressure reduction to 0.1-0.05mbar and through the film packaging step (S5) of the heat fusion can be finally obtained a vacuum insulation panel 10 excellent in thermal insulation performance.
이러한 제조공정에 있어서, 수직몰드(20)의 내부 크기는 도 2에 도시된 바와 같이, 높이(h)를 50㎝로 고정하고, 길이방향이 크기(l)는 50 - 100㎝ 사이이며, 폭(w)의 크기는 5 - 15㎝ 사이이다. 그리고 대형 진공단열판넬이 제조는 작은 발포체 판넬(10)을 2개 이상 사용하여 제조할 수 있다.In this manufacturing process, the inner size of the vertical mold 20 is fixed to the height (h) to 50cm, as shown in Figure 2, the longitudinal direction of the size (l) is between 50-100cm, width The size of (w) is between 5-15 cm. And large vacuum insulation panel can be manufactured using two or more small foam panel (10).
또한 도 3과 같은 연속기포 구조를 가지는 100% 개방셀 폴리우레탄 발포체(11)의 밀도는 대형 판넬(10)의 제조시 휘어짐을 방지하기 위해서는 60 - 80kg/㎡ 사이가 적당하다.In addition, the density of the 100% open cell polyurethane foam 11 having a continuous bubble structure as shown in Figure 3 is suitable between 60-80kg / ㎡ to prevent the bending during the manufacture of the large panel (10).
그리고 몰드(20)의 온도는 빠른 경화를 위하여 40 - 50℃ 사이가 적당하다. 본 발명에 있어서, 수직몰드(20)에 의하여 제조된 개방셀 경질 폴리우레탄 발포체(11)는 기존의 발포체에 비하여 압축강도가 매우 높기 때문에 이를 사용한 진공단열판넬(10) 제조시 두께를 10mm 까지 낮출 수 있다.And the temperature of the mold 20 is suitable between 40-50 ℃ for rapid curing. In the present invention, since the open-cell rigid polyurethane foam 11 manufactured by the vertical mold 20 has a very high compressive strength as compared to the conventional foam, the thickness of the vacuum insulation panel 10 using the same is lowered to 10 mm. Can be.
본 발명에서 완전 수발포로 제조된 개방셀 경질 폴리우레탄 발포체(11)는 폐쇄셀을 전혀 포함하고 있지 않지만, 장기적으로는 발포체 셀(14)의 벽의 내부에 함유된 가스들이 서서히 방출되며 열융착된 틈과 필름(12)을 통하여 미량의 가스가 투과되어 내부의 압력을 증가시킴으로써 진공단열재의 단열성능이 저하된다.In the present invention, the open-cell rigid polyurethane foam 11 made of fully water-foamed does not contain any closed cells, but in the long term, the gases contained in the walls of the foam cells 14 are gradually released and heat-sealed. A small amount of gas is allowed to pass through the gap and the film 12 to increase the internal pressure, thereby degrading the heat insulating performance of the vacuum insulator.
이와 같은 내부압력 상승의 문제를 해결하기 위하여 전술한 바와 같이, 가스를 흡착하여 내부의 진공상태를 15년 이상 유지시켜주는 무기물로 구성된 가스흡착제(13)를 사용한다. 본 발명의 실시예에 적용된 가스흡착제(13)는 이탈리아의 사이즈 케터스사의 무기계 가스흡착제(13)인 일명 '콤보 III'를 진공단열재 내부에 부착시켜 초기의 열절연 특성을 그대로 유지할 수 있었다.In order to solve the problem of the internal pressure rise, as described above, a gas adsorbent 13 made of an inorganic material that adsorbs gas and maintains the vacuum state therein for at least 15 years is used. Gas adsorbent 13 applied to the embodiment of the present invention was able to maintain the initial thermal insulation properties by attaching a so-called 'Combo III', which is an inorganic gas adsorbent 13 of Size Ketters of Italy inside the vacuum insulation.
본 발명에서는 수직몰드 발포방식을 도입하여 100% 개방셀 폴리우레탄 발포체(11)의 열전달 방향 기포막간의 공극거리가 줄어들고 연속기포 구조(도 3 참조)를 가지는 대형 100% 개방셀 경질 폴리우레탄 발포체(11)는 로터리 방식의 연속생산이 가능하게 되며 물성 및 성능이 일정하고 산업적으로 안정된 가격으로 제조하는 것이 가능하다.In the present invention, by introducing a vertical mold foaming method, the air gap between the 100% open cell polyurethane foam 11 in the heat transfer direction of the bubble membrane is reduced and a large 100% open cell rigid polyurethane foam having a continuous bubble structure (see Fig. 3) ( 11) is capable of continuous production of rotary type, and its physical properties and performances are constant and can be manufactured at industrially stable price.
그리고 발포체(11)의 고점도 이소시아네이트를 사용하면 더욱 균일한 물성 및 성능을 가지는 경질 폴리우레탄 발포체(11)를 얻을 수 있다.When the high viscosity isocyanate of the foam 11 is used, the rigid polyurethane foam 11 having more uniform physical properties and performance can be obtained.
또한 성능이 균일하고 가격적으로 저렴한 심재를 적용함으로써 단열성능이 우수하고 가격적으로 저렴한 진공단열판넬(10)의 제조가 가능하고, 냉장고에 적용시 진공단열판넬(10)의 두께를 줄일 수 있음에 따라 적용이 쉽고 에너지 소비량을 줄일 수 있다.In addition, by applying a core material with uniform performance and inexpensive price, it is possible to manufacture a vacuum insulation panel 10 having excellent thermal insulation performance and low cost, and to reduce the thickness of the vacuum insulation panel 10 when applied to a refrigerator. This makes it easy to apply and reduces energy consumption.
이하의 표 1은 본 발명에서와 같은 수직몰드와 종래의 수평몰드/더블 콘베이어 방식을 비교한 표이다.Table 1 below is a table comparing the vertical mold and the conventional horizontal mold / double conveyor system as in the present invention.
이에 나타난 바와 같이 제조한 100% 개방셀 폴리우레탄 발포체(11)는 발포방향으로의 셀 크기 즉, 단열방향으로의 셀 크기가 종래의 수평몰드에서는 150㎛이고, 본 발명의 수직몰드 방식에서는 90㎛로 나타났다.100% open cell polyurethane foam 11 prepared as shown in the cell size in the foam direction, that is, the cell size in the adiabatic direction is 150㎛ in the conventional horizontal mold, 90㎛ in the vertical mold method of the present invention Appeared.
따라서 이에 따른 열전도도 또한 종래의 수평몰드에서는 0.0070kcal/mhr℃이고, 반면에 본 발명의 수직몰드에서는 0.0045kcal/mhr℃로서 종래의 수평몰드 방식에 비하여 본 발명의 수직몰드 방식으로 제조한 진공단열판넬의 성능이 보다 양호하다는 것을 알 수 있다.Therefore, the thermal conductivity is also 0.0070 kcal / mhr ℃ in the conventional horizontal mold, while in the vertical mold of the present invention is 0.0045 kcal / mhr ℃ vacuum insulation prepared by the vertical mold method of the present invention compared to the conventional horizontal mold method It can be seen that the performance of the panel is better.
이상과 같은 본 발명에 따른 진공단열판넬과 그 제조방법은 수직몰드 방식에 의하여 균일한 물성 및 성능을 가지는 경질 폴리우레탄을 산업적으로 저렴한 제조비용으로 제조할 수 있고, 또한 성능이 균일하고 가격적으로 저렴한 심재를 적용함으로써 단열성능이 0.0045kcal/mhr℃ 정도로 우수하고, 가격적으로 저렴한 진공단열판넬의 제조가 가능한 효과가 있다.The vacuum insulation panel and its manufacturing method according to the present invention as described above can produce a rigid polyurethane having uniform properties and performance by the vertical molding method at an industrially low manufacturing cost, and also the performance is uniform and cost-effective By applying an inexpensive core material, the thermal insulation performance is excellent at about 0.0045 kcal / mhr ° C, and it is possible to manufacture a low-cost vacuum insulated panel.
Claims (1)
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| KR20030064066A (en) * | 2002-01-25 | 2003-07-31 | 박광돈 | insulation pannel using a hermetically sealed blow-hole and the production method using the same |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06123550A (en) * | 1992-10-13 | 1994-05-06 | Matsushita Refrig Co Ltd | Pack of vacuum insulation material |
| JPH06337093A (en) * | 1993-05-27 | 1994-12-06 | Matsushita Refrig Co Ltd | Vacuum insulation pack |
| JPH0763469A (en) * | 1993-08-30 | 1995-03-10 | Hitachi Ltd | Vacuum heat insulating member |
| US5478867A (en) * | 1993-07-07 | 1995-12-26 | The Dow Chemical Company | Microporous isocyanate-based polymer compositions and method of preparation |
| JPH08291965A (en) * | 1995-04-20 | 1996-11-05 | Hitachi Ltd | Vacuum thermal insulating material |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06123550A (en) * | 1992-10-13 | 1994-05-06 | Matsushita Refrig Co Ltd | Pack of vacuum insulation material |
| JPH06337093A (en) * | 1993-05-27 | 1994-12-06 | Matsushita Refrig Co Ltd | Vacuum insulation pack |
| US5478867A (en) * | 1993-07-07 | 1995-12-26 | The Dow Chemical Company | Microporous isocyanate-based polymer compositions and method of preparation |
| JPH0763469A (en) * | 1993-08-30 | 1995-03-10 | Hitachi Ltd | Vacuum heat insulating member |
| JPH08291965A (en) * | 1995-04-20 | 1996-11-05 | Hitachi Ltd | Vacuum thermal insulating material |
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