KR100356540B1 - vacuum adiabatic panel is adapted - Google Patents

vacuum adiabatic panel is adapted Download PDF

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Publication number
KR100356540B1
KR100356540B1 KR10-1998-0020967A KR19980020967A KR100356540B1 KR 100356540 B1 KR100356540 B1 KR 100356540B1 KR 19980020967 A KR19980020967 A KR 19980020967A KR 100356540 B1 KR100356540 B1 KR 100356540B1
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KR
South Korea
Prior art keywords
insulation panel
vacuum insulation
vacuum
foam
refrigerator
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KR10-1998-0020967A
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Korean (ko)
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KR20000000977A (en
Inventor
황진택
장미선
석상조
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삼성전자 주식회사
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Priority to KR10-1998-0020967A priority Critical patent/KR100356540B1/en
Publication of KR20000000977A publication Critical patent/KR20000000977A/en
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Publication of KR100356540B1 publication Critical patent/KR100356540B1/en

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Classifications

    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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
    • 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

Abstract

본 발명은 진공단열판넬에 관한 것으로, 본 발명의 진공단열판넬은 개방셀 경질 폴리우레탄 발포체를 수평 또는 수직몰드에서 프레스를 이용하여 발포체의 단열방향 기포의 두께를 0.05mm - 0.09mm의 수준으로 압축하는 제조방법을 제공한다. 이러한 제조방법으로부터 스킨층을 제거한 개방셀 폴리우레탄 발포체와 가스흡착제를 고진공용 필름으로 감싸고, 0.02 - 0.1mbar에서 진공배기하여 제조되는 진공단열판넬은 열전도율이 0.0045kcal/mhr℃ 이하의 뛰어난 단열성능을 보여줌과 동시에 발포체의 밀도가 높지 않기 때문에 경제적으로도 매우 유용한 제조방법이다. 또한 진공단열판넬의 냉장고 적용시에는 판넬을 플라스틱과 같은 시트판에 부착해서 돌기물을 이용해 냉장고의 내상 선반홈에 삽입하여 고정시키는 방법을 적용함으로써 기존 제조공정의 수정없이 작업의 효율성을 향상시킬 수 있는 효과가 있다.The present invention relates to a vacuum insulation panel, wherein the vacuum insulation panel of the present invention compresses the thickness of the bubble in the adiabatic direction of the foam to a level of 0.05mm-0.09mm by using a press in a horizontal or vertical mold of the open-cell rigid polyurethane foam It provides a manufacturing method. The vacuum insulation panel manufactured by wrapping the open cell polyurethane foam and gas adsorbent from which the skin layer was removed from the high vacuum film and evacuating the vacuum at 0.02-0.1 mbar has excellent thermal insulation performance of less than 0.0045 kcal / mhr ℃. At the same time, because the density of the foam is not high, it is economically very useful manufacturing method. In addition, when the refrigerator is applied to the vacuum insulation panel, the panel is attached to a sheet plate such as plastic, and the projection is inserted into the inner shelf of the refrigerator by using projections to fix it, thereby improving work efficiency without modifying the existing manufacturing process. It has an effect.

Description

진공단열판넬{vacuum adiabatic panel is adapted}Vacuum adiabatic panel is adapted}

본 발명은 개방셀 경질 폴리우레탄 발포체로 된 진공단열판넬에 관한 것이다.The present invention relates to a vacuum insulation panel made of open cell rigid polyurethane foam.

오존층의 파괴 및 지구 온난화 문제가 전 세계적인 환경이슈로 대두되면서 CFC 규제와 함께 에너지 사용량에 대한 규제도 점차 강화되고 있다. 따라서 이러한 환경규제에 보다 적극적으로 대응하기 위한 저에너지 소비형 냉장고가 요구되어 지고 있다. 이러한 요구로 인해 일본 및 유럽의 일부 회사에서는 단열성능이 우수한 진공단열판넬을 냉장고에 일부 적용하여 출시하고 있다.As the problem of destruction of the ozone layer and global warming has become a global environmental issue, the regulation of energy consumption is being tightened along with the regulation of CFC. Therefore, there is a need for a low energy consumption refrigerator to respond more actively to such environmental regulations. Due to these demands, some companies in Japan and Europe are applying some of the heat insulating vacuum insulation panels to refrigerators.

이 진공단열판넬은 내부에 충진되는 심재로 경제성과 생산성이 우수한 개방셀 경질 폴리우레탄 발포체가 이용되며, 이 때 단열방향의 공극거리를 0.12 - 0.13mm 까지 미세화하고, 외부에 고진공용 금속라미네이트 필름을 입히고, 가스흡착제를 삽입한 후, 내부를 0.02 - 0.1mbar 까지 감압시키도록 한 것이다.This vacuum insulation panel is filled with a core material filled inside, and an open-cell rigid polyurethane foam with excellent economics and productivity is used.At this time, the pore distance in the adiabatic direction is reduced to 0.12-0.13mm, and a high-vacuum metal laminate film is applied to the outside. After coating, the gas adsorbent is inserted and the inside is depressurized to 0.02-0.1 mbar.

그리고 열전도율은 0.006 - 0.007kcal/mhr℃ 이며, 기존의 폐쇄될 경질 폴리우레탄 발포체의 열전도율 0.013 - 0.020kcal/mhr℃ 보다 매우 우수한 단열성능을 보여준다. 이 때 충진재인 개방셀 경질 폴리우레탄 발포체의 기포간 공극거리를 미세화하기 위해 핵제로는 비극성을 가지는 유기화합물인 퍼플루오로 알칸 또는 테트라메틸 실란 등이, 변성 이소시아네이트로는 폴리메칠렌 폴리페닐 폴리이소시아네이트와 모노올과의 반응으로 생성되는 프리폴리머의 적용이 필수적이나, 그에 따르는 환경문제와 가격상승의 문제에 직면하여 있다.And the thermal conductivity is 0.006-0.007kcal / mhr ℃, shows a thermal insulation performance much better than the thermal conductivity of 0.013-0.020 kcal / mhr ℃ of the rigid polyurethane foam to be closed. At this time, in order to refine the air gap between the bubbles of the open-cell rigid polyurethane foam as a filler, a non-polar organic compound such as perfluoro alkane or tetramethyl silane is used as the nucleating agent, and polymethylene polyphenyl polyisocyanate is used as the modified isocyanate. The application of prepolymers produced by the reaction with and monools is essential, but there are environmental problems and price increases.

이러한 진공단열판넬의 환경문제를 극복하고 단열성능을 개선한 진공단열판넬의 새로운 제작방법으로는 100% 물발포 개방셀 폴리우레탄 발포체를 제조한 직후에 고압프레스 등을 이용하여 기포의 두께를 0.04mm 이하가 되도록 압축하여 열전도율이 0.0035 - 0.0040kcal/mhr℃ 인 진공단열판넬의 제조방법이 일본 특허평 6-213561 공보에 제안되고 있다. 그러나 프레스를 이용하여 기포의 두께를 0.01 - 0.04mm 가 되도록 압축하게 되면, 밀도가 100 - 300kg/㎥ 인 고밀도의 발포체가 형성됨으로써, 고밀도에 따른 폴리우레탄의 사용량이 증가하고 제조공정상의 난이한 점으로 인해 경제성이 미흡한 문제점이 있었다.As a new method of manufacturing a vacuum insulation panel which overcomes the environmental problems of the vacuum insulation panel and improves the thermal insulation performance, the thickness of the bubble is 0.04mm using a high pressure press immediately after manufacturing 100% water-foaming open cell polyurethane foam. Japanese Patent Application Laid-Open No. 6-213561 proposes a method for manufacturing a vacuum insulation panel having a thermal conductivity of 0.0035 to 0.0040 kcal / mhr ° C. by compressing it to be below. However, if the bubble is compressed to a thickness of 0.01-0.04 mm by using a press, a high density foam having a density of 100-300 kg / m 3 is formed, thereby increasing the amount of polyurethane used according to the high density and difficulty in the manufacturing process. Due to the lack of economic problems.

본 발명은 상기의 문제점을 해결하기 위한 것으로, 본 발명의 목적은 진공단열판넬의 제조시 프레스 압착방법을 적용하되 적절한 밀도와 단열성능을 가지도록 한 진공단열판넬을 제공하는 것이다.The present invention is to solve the above problems, an object of the present invention is to provide a vacuum insulation panel to have a suitable density and insulation performance while applying a press crimping method in the manufacture of a vacuum insulation panel.

도 1은 본 발명에 따른 진공단열판넬과 냉장고의 내상을 보인 사시도이다.1 is a perspective view showing the inner phase of the vacuum insulation panel and the refrigerator according to the present invention.

도 2는 본 발명에 따른 진공단열판넬을 보인 사시도이다.2 is a perspective view showing a vacuum insulation panel according to the present invention.

도 3은 본 발명의 진공단열판넬의 수평몰드공정에 따른 제조공정을 보인 도면이다.Figure 3 is a view showing a manufacturing process according to the horizontal molding process of the vacuum insulation panel of the present invention.

도 4는 본 발명의 진공단열판넬의 수직몰드공정에 따른 제조공정을 보인 도면이다.4 is a view showing a manufacturing process according to the vertical molding process of the vacuum insulation panel of the present invention.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10...냉장고 내상 11...선반 홈10 ... refrigerator inner 11 ... shelf home

20...진공단열판넬 21...가스흡착제20 Vacuum insulation panel 21 Gas adsorbent

22...진공단열필름 30...시트22 ... vacuum insulation film 30 ... sheet

31...돌기 100...수평몰드31.Protrusion 100 ... Horizontal Mold

200...수직몰드200 ... Vertical Mold

전술한 목적을 달성하기 위하여 본 발명은, 내부에 가스흡착제가 설치되고, 외면이 고진공필름에 의하여 포장된 진공단열판넬에 있어서,In order to achieve the above object, the present invention, in the vacuum insulation panel is installed inside the gas adsorbent, the outer surface is packaged by a high vacuum film,

상기 진공단열판넬은 결합면에 두께가 0.5 - 1.5mm인 시트가 부착되고, 상기 시트에는 결합돌기가 설치된 것을 특징으로 한다.The vacuum insulation panel has a thickness of 0.5-1.5mm is attached to the bonding surface, the sheet is characterized in that the coupling projection is installed.

이하에서는 본 발명에 따른 실시예를 첨부된 도면을 참조하여 설명하기로 한다.Hereinafter, with reference to the accompanying drawings an embodiment according to the present invention will be described.

도 1은 본 발명에 따른 진공단열판넬과 냉장고의 내상을 보인 사시도이고, 도 2는 본 발명에 따른 진공단열판넬을 보인 사시도이다. 그리고 도 3은 본 발명의 진공단열판넬의 수평몰드공정에 따른 제조공정을 보인 도면이다.1 is a perspective view showing the inner phase of the vacuum insulation panel and the refrigerator according to the present invention, Figure 2 is a perspective view showing a vacuum insulation panel according to the present invention. 3 is a view showing a manufacturing process according to the horizontal molding process of the vacuum insulation panel of the present invention.

본 발명의 진공단열판넬의 제조방법은 도 3과 도 4에 도시된 바와 같이, 최초 외형을 이루는 몰드(100)(200)에 폴리우레탄을 발포하여 발포체(140)(240)를 형성하는 발포단계를 거친다. 이 발포단계에서는 수평몰드(100) 또는 수직몰드(200)에서 개방셀 경질 폴리우레탄을 발포기(120)(220)를 이용하여 발포하여 발포체(140)(240)를 제조하는 단계이다.The method of manufacturing a vacuum insulation panel of the present invention, as shown in Figure 3 and 4, the foaming step of forming a foam (140, 240) by foaming a polyurethane in the mold 100, 200 forming the initial appearance Go through. In this foaming step, the open cell rigid polyurethane is foamed in the horizontal mold 100 or the vertical mold 200 by using the foamers 120 and 220 to manufacture the foams 140 and 240.

그리고 계속해서 압축단계를 거치게 된다. 이 압축단계는 택-프리타임(Tack-free time)이 지나고, 5분 이내에 30톤 이하의 압축프레스(110)(210)를 사용하여 수평 또는 수직방향으로 발포체(140)(240)의 기포 두께(t1)(t2)를 0.05 - 0.09mm가 되도록 압축하여 1 - 10분간 경화시킨 후, 표면의 스킨층을 제거하면 100% 개방셀 폴리우레탄 발포체(140)(240)를 얻게 된다.Then it goes through the compression stage. This compression step has a bubble thickness of the foams 140 and 240 in a horizontal or vertical direction using a compression press 110 or 210 of 30 tons or less within 5 minutes after the tack-free time. After (t 1 ) (t 2 ) is compressed to 0.05 to 0.09 mm and cured for 1 to 10 minutes, the skin layer on the surface is removed to obtain 100% open cell polyurethane foams 140 and 240.

그리고 가스흡착제를 삽입하는 가스흡착제 삽입단계를 거치고 난 후, 금속라미네이트 필름(22)으로 포장하면서 내부를 0.02 - 0.1mbar 까지 감압시키고 필름을 열융착하는 진공필름포장단계를 거치게 되면, 열전도율이 0.045kcal/mhr℃ 이하인 고성능의 진공단열판넬(20)을 얻을 수 있다.After the gas adsorbent insertion step of inserting the gas adsorbent, the film is wrapped with the metal laminate film 22, the pressure is reduced to 0.02-0.1 mbar, and the vacuum film packaging step of thermal fusion is performed. The thermal conductivity is 0.045 kcal. It is possible to obtain a high-performance vacuum insulation panel 20 of less than / mhr ℃.

본 발명의 도 3에 있어서의 수평몰드(100)의 내부크기는 가로(세로)가 400 - 1000mm 이고, 높이는 100 - 300mm 가 적당하며, 도 4에서 수직몰드(200)의 내부크기는 길이가 500 - 1000mm 이고, 폭은 50 - 150mm 이며, 높이는 300 - 600mm 가 적당하며, 제조하고자 하는 진공단열판넬(20)의 규격에 적합하도록 몰드(100)(200)의 규격을 결정하는 것이 바람직하고, 몰드(100)(200)의 온도는 40 - 60℃가 적당하다.In the present invention, the horizontal mold 100 has an internal size of 400-1000 mm, a height of 100-300 mm, and an internal size of the vertical mold 200 in FIG. -1000mm, width is 50-150mm, height is 300-600mm is suitable, it is preferable to determine the size of the mold 100, 200 to meet the specifications of the vacuum insulation panel 20 to be manufactured, As for the temperature of (100) 200, 40-60 degreeC is suitable.

한편, 프레스(110)(210)에 의한 압축공정 직전의 개방셀 경질 폴리우레탄 발포체(140)(240)의 제조를 위해 사용된 폴리올은 가교도가 높은 경질 발포체 제조용 폴리올을 2 - 4 가지 조합하여 사용하고, 발포체(140)(240)의 강도보강을 위해 글루코오스나, 글리세린 또는 펜타에리트리올 등을 첨가하였고, 발포체(140)(240)로는 100% 물발포 혹은 유기용제 발포제를 일부 혼합하여 사용하며, 본 발명에서는 핵제인 퍼플루오로 알칸과, 변성 이소시아네이트인 프리폴리머는 적용하지 않는다.On the other hand, the polyols used for the production of the open-cell rigid polyurethane foams 140 and 240 immediately before the compression process by the presses 110 and 210 are used in combination of 2 to 4 polyols for producing rigid foams having high crosslinking degree. In addition, in order to reinforce the strength of the foams 140 and 240, glucose, glycerin or pentaerythritol was added, and the foams 140 and 240 were used by mixing some 100% water foam or an organic solvent blowing agent. In the present invention, perfluoro alkanes, which are nucleating agents, and prepolymers, which are modified isocyanates, do not apply.

또한 개방셀 폴리우레탄 발포체(110)(210)의 밀도는 진공단열판넬 제조시 휘어짐을 방지하고 경제성을 가지기 위해서는 60 - 100kg/㎥ 사이가 적당하다.In addition, the density of the open cell polyurethane foam (110) (210) is suitable between 60-100kg / ㎥ in order to prevent the bending during the manufacturing of vacuum insulation panel and to have economic efficiency.

이러한 본 발명에서 진공단열판넬(20)의 냉장고 적용시에는 도 1과 도 2에 도시된 바와 같이, 판넬(20)을 냉장고의 내상(10)에 붙임으로써 장애물 등으로 인한 작업의 난해성 문제를 극복하는 한편, 진공단열판넬(20)을 고온부인 철판에 접착시키는 것과 대비하여 저온부인 냉동실 또는 냉장실에 인접하고 있는 내상(10)에 위치함으로써 단열성능의 개선효과를 증대시킬 수 있게 되었다.In the present invention, when applying the refrigerator of the vacuum insulation panel 20, as shown in Fig. 1 and 2, by attaching the panel 20 to the inner box 10 of the refrigerator to overcome the problem of difficulty of work due to obstacles and the like. On the other hand, in contrast to bonding the vacuum insulation panel 20 to the iron plate, which is a high temperature portion, it is possible to increase the effect of improving the thermal insulation performance by being located in the inner phase 10 adjacent to the freezing chamber or the refrigerating chamber, which is a low temperature portion.

진공단열판넬의 냉장고 적용방법을 보다 자세히 설명하면, 도 2에 도시된 바와 같이 진공단열판넬(20)의 한 면에 핫멜트 또는 양면 테이프(32)를 도포한 후, 진공단열판넬(20)과 같은 크기의 사출 또는 압출 플라스틱 시트판(30)에 부착한다. 플라스틱 시트판(30)의 두께(T)는 0.5 - 2.0mm 가 적당하다. 그리고 시트판(30)이 부착되는 냉장고 내상(10)의 외측면에 선반의 안착을 위하여 내상(10)의 내측으로 돌출하여 있는 외측 홈(11)에 끼워질 수 있는 크기로 마련된 돌기(31)를 부착하고, 진공단열판넬(20)을 내상(10)에 조립하여 고정시킨 후, 외상을 결합하고 우레탄폼을 내상과 외상 사이에 발포한다.The refrigerator application method of the vacuum insulation panel in more detail, as shown in Figure 2 after applying a hot melt or double-sided tape 32 on one side of the vacuum insulation panel 20, such as vacuum insulation panel 20 Attached to a sized injection or extruded plastic sheet plate 30. The thickness T of the plastic sheet plate 30 is suitably 0.5 to 2.0 mm. And projections 31 provided with a size that can be fitted to the outer groove 11 protruding inwardly of the inner box 10 for mounting the shelf on the outer surface of the refrigerator inner box 10 to which the sheet plate 30 is attached. After attaching, and fixed by assembling the vacuum insulation panel 20 to the inner phase (10), to combine the outer wound and foamed urethane foam between the inner and outer wound.

이 때, 돌기(31)를 플라스틱 시트판(30)과 일체 사출하여도 된다. 이렇게 하면 진공단열판넬(20)을 냉장고 외판에 부착하였을 때 발생되는 철판 굴곡문제도 해결할 수 있고, 내상(10)의 선반을 이용해 항상 일정한 위치에 진공단열판넬(20)을 고정 부착시킬 수 있다.At this time, the protrusions 31 may be integrally injected with the plastic sheet plate 30. This solves the iron plate bending problem that occurs when the vacuum insulation panel 20 is attached to the refrigerator outer plate, it is possible to always fix the vacuum insulation panel 20 to a fixed position using the shelf of the inner box (10).

이하에서는 본 발명의 실시예를 도면을 참조하여 설명하기로 한다.Hereinafter, embodiments of the present invention will be described with reference to the drawings.

수평몰드방식은 도 3의 (a)와 (b), 그리고 (c)와 같이 상, 하 몰드용기(100)에 발포기(120)에 의하여 주입된 발포액이 부풀어 올라 상단까지 올라왔을 때, 30톤 이하의 프레스(110)로 초기 발포체 두께의 1/2이하로 (d)와 같이 눌러 압축방향의 개방셀 기포두께(t1)를 단열방향(열의 유통을 차단하기 위한 면)에 대하여 0.05mm의 크기가 되게 한다.When the horizontal molding method as shown in Figure 3 (a) and (b), and (c) when the foam liquid injected by the foamer 120 in the upper and lower mold containers 100 swells up to the top, Press the cell thickness (t 1 ) in the compression direction to less than 1/2 of the initial foam thickness with a press 110 of 30 tons or less, as in (d) 0.05 for the adiabatic direction (surface for blocking heat flow). Let mm be the size.

이 때, 압축이 용이하게 하기 위해 몰드(100)의 뚜껑에 설치된 진공펌프(130) 또는 진공청소기로 몰드(100) 안의 기체를 제거해 준다. 이렇게 하면 개방셀을 만들기 위한 부과적인 효과도 얻을 수 있다. 프레스(110)에 의한 압축공정은 용기(몰드)온도 40 - 60℃에서 1 - 10분 동안 지속하며 경화시키고, 완전개방셀 폴리우레탄 발포체(140)를 띠톱이 설치된 절단기를 사용해 스킨층을 제거하여 두께 10-30mm의 판넬(20)을 만든다. 그리고 120-130℃의 건조용 오븐에서 0.5-2시간 동안 건조시켜 수분 및 잔존가스를 완전히 제거하면 (d)와 같은 발포체(140)가 얻어진다.At this time, the gas in the mold 100 is removed by a vacuum pump 130 or a vacuum cleaner installed on the lid of the mold 100 to facilitate compression. This also has the additional effect of creating an open cell. The compression process by the press 110 is cured for 1 to 10 minutes at the container (molding) temperature 40-60 ℃, remove the skin layer by using a cutter with a band saw on the fully open cell polyurethane foam 140 A panel 20 of thickness 10-30 mm is made. And when dried in a drying oven at 120-130 ° C for 0.5-2 hours to completely remove the moisture and residual gas to obtain a foam 140 as shown in (d).

그리고 PET필름과 알루미늄박, HDPE필름으로 구성된 다층 라미네이트 필름(22)으로 포장한 후, 진공포장기 내에서 내부를 0.02 - 0.1mbar 로 감압하고 열융착하면, 도 2와 같은 진공단열판넬(20)이 제작되어진다.After packaging with a multilayer laminate film 22 composed of a PET film, an aluminum foil, and an HDPE film, the inside of the vacuum packaging machine is decompressed to 0.02-0.1 mbar and heat-sealed, whereby the vacuum insulation panel 20 as shown in FIG. It is made.

도 4는 수직몰드 압축프레스 방법으로 수직몰드(200) 하단 주입구에 발포기(220) 헤드를 부착하고, (a), 그리고 (b), (c)와 같이 개방셀 폴리우레탄 발포체(240)를 수직 발포한다. 그리고 수직몰드(200) 상단에는 공기를 배기시키는 홀(250)을 만들어 반응과정에서 발생되는 탄산가스 등을 제거해 준다. 그런 후에 (d), (f)에 도시된 바와 같이 프레스(210)로 측면에서 초기두께의 2/3 이하로 압축하여 개방셀 폴리우레탄 발포체(240)를 제조한다. 이에 따라 단열방향(열의 유통을 차단하기 위한 면)으로의 기포두께(t2)를 0.05mm에서 0.09mm가 되도록 제조한다.Figure 4 is attached to the foaming machine 220 head to the lower injection hole of the vertical mold 200 by the vertical mold compression method, and as shown in (a), and (b), (c) open-cell polyurethane foam 240 Fire vertically. And the vertical mold 200 to remove the carbon dioxide generated in the reaction process by making a hole 250 for exhausting the air. Thereafter, as shown in (d) and (f), the press 210 is pressed to 2/3 or less of the initial thickness on the side to prepare an open cell polyurethane foam 240. Accordingly, the bubble thickness t 2 in the adiabatic direction (surface for blocking the flow of heat) is manufactured so as to be 0.05 mm to 0.09 mm.

이하에서는 본 발명의 제조방법에 따른 네가지 경우의 실시예와 두 개의 비교예를 표1을 참조하여 비교 설명하고자 한다.Hereinafter, the four examples and the two comparative examples according to the manufacturing method of the present invention will be described with reference to Table 1.

[표1]Table 1

실시예 및 비교예 결과Example and Comparative Example Results

비교예 중의 비교예 1은 실시예 1 - 2와 동일한 원료 및 몰드를 사용하여 단열방향의 기포두께를 0.03mm가 되도록 제조한 것이고, 비교예 2는 프레스몰드를 사용하지 않고, 핵제와 변성 이소시아네이트를 이용하여 제조한 개방셀 폴리우레탄 발포체를 사용한 것이다.Comparative Example 1 of the Comparative Example was prepared using the same raw materials and molds as in Examples 1 and 2 so as to have a bubble thickness of 0.03 mm in the adiabatic direction, and Comparative Example 2 was prepared by using a nucleating agent and a modified isocyanate without using a press mold. The open cell polyurethane foam manufactured using the above-mentioned thing is used.

한편, 실시예 및 비교예의 진공단열판넬의 내부압은 진공포장기에서 0.05mbar로 제조하였고, 열전도율은 25℃에서 측정하였다.On the other hand, the internal pressure of the vacuum insulation panels of Examples and Comparative Examples was prepared at 0.05 mbar in a vacuum packaging machine, the thermal conductivity was measured at 25 ℃.

이에 나타난 결과에 따르면 실시예 1, 2, 3, 4에서와 같이 프레스로 압축하여 개방셀 경질 폴리우레탄 발포체의 단열방향 기포의 두께를 0.05 - 0.09mm가 되도록 하여 진공단열판넬을 제조하였을 때 열전도율은 0.045kcal/mhr℃ 이하의 매우 우수한 단열성능을 보여주고 있다.According to the results shown, when the vacuum insulation panel was manufactured by compressing with a press as in Examples 1, 2, 3, and 4 so that the thickness of the adiabatic bubble in the open-cell rigid polyurethane foam was 0.05-0.09 mm. It shows very good thermal insulation performance below 0.045kcal / mhr ℃.

반면에, 단열방향의 기포두께를 0.03mm가 되도록 제조한 비교예 1의 경우에는 단열성능은 매우 우수하지만 발포체의 밀도가 210kg/㎥정도로 실시예 1-4보다 2-3배 가량 높게 나타나고 있기 때문에, 경제성이 미흡한 결과를 보여주게 된다.On the other hand, in the case of Comparative Example 1 manufactured so that the bubble thickness in the adiabatic direction to 0.03mm, the heat insulating performance is very good, but since the density of the foam is about 210 kg / m 3, it is 2-3 times higher than in Example 1-4. The result is a lack of economic feasibility.

이상과 같은 본 발명의 진공단열판넬은 개방셀 경질 폴리우레탄 발포체를 수평 또는 수직몰드에서 프레스를 이용하여 발포체의 단열방향 기포의 두께를 0.05mm - 0.09mm의 수준으로 압축하는 제조방법을 제공한다. 이러한 제조방법으로부터 스킨층을 제거한 개방셀 폴리우레탄 발포체와 가스흡착제를 고진공용 필름으로 감싸고, 0.02 - 0.1mbar에서 진공배기하여 제조되는 진공단열판넬은 열전도율이 0.0045kcal/mhr℃ 이하의 뛰어난 단열성능을 보여줌과 동시에 발포체의 밀도가 높지 않기 때문에 경제적으로도 매우 유용한 제조방법이다. 또한 진공단열판넬의 냉장고 적용시에는 판넬을 플라스틱과 같은 시트판에 부착해서 돌기를 이용해 냉장고의 내상 선반홈에 삽입하여 고정시키는 방법을 적용함으로써 냉장고의 구조 변경이나 제조공정의 수정 없이 간단하게 진공단열판넬을 냉장고에 부착시킬 수 있으므로, 냉장고의 단열성능을 향상시킬 수 있음은 물론, 제조작업의 효율성을 향상시킬 수 있는 효과가 있다.The vacuum insulation panel of the present invention as described above provides a manufacturing method of compressing the thickness of the foam insulated in the adiabatic direction of the foam using a press in a horizontal or vertical mold in the open cell rigid polyurethane foam to a level of 0.05mm-0.09mm. The vacuum insulation panel manufactured by wrapping the open cell polyurethane foam and gas adsorbent from which the skin layer was removed from the high vacuum film and evacuating the vacuum at 0.02-0.1 mbar has excellent thermal insulation performance of less than 0.0045 kcal / mhr ℃. At the same time, because the density of the foam is not high, it is economically very useful manufacturing method. In addition, when the refrigerator is applied to the vacuum insulation panel, the panel is attached to a sheet plate such as plastic, and then inserted into the inner shelf shelf of the refrigerator using protrusions to fix the refrigerator, without changing the structure of the refrigerator or modifying the manufacturing process. Since the panel can be attached to the refrigerator, it is possible to improve the thermal insulation performance of the refrigerator, as well as to improve the efficiency of the manufacturing operation.

Claims (1)

내부에 가스흡착제가 설치되고, 외면이 고진공필름에 의하여 포장된 진공단열판넬에 있어서,In the vacuum insulation panel in which the gas adsorbent is installed inside and the outer surface is packed by high vacuum film, 상기 진공단열판넬은 결합면에 두께가 0.5 - 1.5mm인 시트가 부착되고, 상기 시트에는 결합을 위한 돌기가 설치된 것을 특징으로 하는 진공단열판넬.Wherein the vacuum insulation panel is a vacuum insulation panel, characterized in that the sheet is attached to the bonding surface is 0.5-1.5mm thick, the projection is installed on the sheet.
KR10-1998-0020967A 1998-06-05 1998-06-05 vacuum adiabatic panel is adapted KR100356540B1 (en)

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KR100466614B1 (en) * 2002-03-08 2005-01-15 삼성전자주식회사 Manufacturing method of open cell hard polyurethane form and vacuum adiabatic panel
KR20200012273A (en) 2018-07-26 2020-02-05 남상민 Double Vacuum Insulating Panel and Manufacturing Method Thereof

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EP3789417A1 (en) * 2019-09-06 2021-03-10 Covestro Deutschland AG Polyurethane-based insulation body and method for producing the same

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JPH0763469A (en) * 1993-08-30 1995-03-10 Hitachi Ltd Vacuum heat insulating member
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JPH0763469A (en) * 1993-08-30 1995-03-10 Hitachi Ltd Vacuum heat insulating member

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100466614B1 (en) * 2002-03-08 2005-01-15 삼성전자주식회사 Manufacturing method of open cell hard polyurethane form and vacuum adiabatic panel
KR20200012273A (en) 2018-07-26 2020-02-05 남상민 Double Vacuum Insulating Panel and Manufacturing Method Thereof

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