• Title/Summary/Keyword: 단열소재

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경량 난연성 성형체 제조 및 특성

  • 강영구;조명호
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • 2003.05a
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    • pp.197-201
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    • 2003
  • 플라스틱 제품은 경량이며 내후성, 내구성, 방음성, 단열성, 절연성 등이 우수하고 또한 발포가공에 의해 원료 폴리머의 사용량을 저감시켜 생산원가를 줄일 수 있다는 커다란 장점이 있다. 그러나 물리적인 강도, 가연성, 내열성 등의 한계점 때문에 그 용도가 제한되고 있는 실정이다. 형상 변경이 비교적 용이한 경량 구조체를 이용한 건축소재는 협소공간의 고도 이용과 건설 분야의 양적, 질적인 측면에서 급속한 성장으로 건축자재의 경량화, 고급화 및 다양화를 요구하고 있으며 이에 polyurethane, polyethylene, polystyrene 등의 플리스틱 및 foam 형태의 저밀도 고분자 건축소재의 사용이 급증되고 있다.(중략)

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Fabrication of Light-weight Ceramic Insulation Materials by Using Oxide Ceramic Fibers for Reusable Thermal Protection Systems (산화물 세라믹섬유를 이용한 재사용 열보호시스템용 경량 세라믹 단열소재의 제조)

  • Seongwon, Kim;Min-Soo, Nam;Yoon-Suk, Oh;Sahn, Nahm;Jaesung, Shin;Hyeonjun, Kim;Bum-Seok, Oh
    • Journal of Powder Materials
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    • v.29 no.6
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    • pp.477-484
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    • 2022
  • Thermal protection systems (TPS) are a group of materials that are indispensable for protecting spacecraft from the aerodynamic heating occurring during entry into an atmosphere. Among candidate materials for TPS, ceramic insulation materials are usually considered for reusable TPS. In this study, ceramic insulation materials, such as alumina enhanced thermal barrier (AETB), are fabricated via typical ceramic processing from ceramic fiber and additives. Mixtures of silica and alumina fibers are used as raw materials, with the addition of B4C to bind fibers together. Reaction-cured glass is also added on top of AETB to induce water-proof functionality or high emissivity. Some issues, such as the elimination of clumps in the AETB, and processing difficulties in the production of reusable surface insulation are reported as well.

Introduction to Thermal Insulating Materials and Silica Aerogels (열 차단 소재와 실리카 에어로젤 개요)

  • Hong, Jin-Ho;Kim, Il;Yun, Ju-Ho;Shim, Sang-Eun
    • Elastomers and Composites
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    • v.46 no.1
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    • pp.29-36
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    • 2011
  • The term 'thermal insulating materials' describes a class of materials which can improve the thermal efficiency by reducing the thermal conduction, convention and radiation between the inside and outside of the system. As a thermal insulating material, numerous industrial applications are possible including the automobile, aerospace, aviation, and petrochemical. Especially, the silica aerogel, with their superior thermal insulating behavior, has been widely used as thermal insulating materials. Because the mechanical properties of the silica aerogel cannot meet the industrial demand, use of the silica aerogel is limited. This article aims to review the thermal insulating materials and silica aerogel, and to introduce the silica aerogel/polymer composites.

Mechanical and Fire Resistance Properties of Surface Preparation Mortar in Buildings Using Expanded Graphite (팽창흑연을 활용한 건축물 외단열 바탕조정재의 역학 및 연소 특성평가)

  • Ryu, Hwa-Sung;Shin, Sang-Heon;Song, Sung-Young;Kim, Deuak-Mo
    • Journal of the Korean Recycled Construction Resources Institute
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    • v.7 no.4
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    • pp.395-404
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    • 2019
  • In the case of fire, surface treatment agents used in external insulation finishing methods are substances that are vulnerable to fire due to thin finishes and the combustion of polymers. In this study, it was expected that the performance of surface preparation mortars could be improved by using expandable graphite with excellent thermal performance. Experimental results showed that the mechanical properties of surf ace preparation mortar were improved by using the fly ash and silica fume. Surface treatment materials using expanded graphite have a characteristic of expanding when a fire occurs. It has been shown that heat-swellable surface treatment materials can reduce the penetration of heat sources into the surface of synthetic insulation.

Evaluation on Adiabatic Property for Vehicular Sandwich Composite Structure (차체 구조용 샌드위치 복합소재 단열 특성 평가)

  • Lee Sang Jin;Oh Kyung Won;Jeong Jong Cheol;Kong Chang duk;Kim Jeong Seok;Cho Se Hyun
    • Composites Research
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    • v.19 no.1
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    • pp.9-14
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    • 2006
  • Experimental investigation on heat transfer ratio was firstly performed with three types of sandwich panels such as the Carbon/Epoxy Skin-Aluminum Honeycomb and Balsa Core Sandwich Panel of 37mm thickness, the Carbon/Epoxy Aluminum Skin-Honeycomb Core Sandwich Panel of 57mm thickness (including insulator) and the Carbon/Epoxy Skin-Aluminum Honeycomb Core Sandwich Panel of 37mm thickness based on the KS F 2278:2003(Insulation test method of windows). In additional to this investigation, experimental tests were also done for evaluation of heat transportation ratio with the Aluminum Skin- Aluminium Honeycomb Sandwich Panels of 27mm and 35mm thickness, and Aluminum Skin-Foaming Aluminum Sandwich Panel of 27mm thickness by the KS F2277:2002 (Insulation measuring method of construction component-Calibration heat box method or protective heat box method). In this study, it was found that the larger net heat transfer cross sectional area between the skin and the sandwich core is given, the higher heat transportation ratio occurs. It was also found that the hybrid type insulation had better insulation characteristics compared to the non-hybrid type insulation.

Research on the Architectural Applications of High-Performance Vacuum Insulation Panel (고성능 진공단열재의 건축적인 적용에 관한 연구)

  • Kwon, Young Cheol;Kim, Suk
    • Land and Housing Review
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    • v.10 no.3
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    • pp.23-32
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    • 2019
  • Vacuum Insulation Panel(VIP) has the lowest thermal conductivity among present insulations. It is composed of envelope, core material and getter. Aluminum film is usually used as the envelope of VIP, and it is important component to decide the useful life of VIP. In this research, the thermophysical properties of incombustible fiber glass core VIP were investigated with the possibility of its architectural applications. The results of this research can be summarized as follows: 1) The thermal conductivity of 20mm-thick fiber glass core VIP is resulted as 0.00177W/m·K, which means that 20mm-thick VIP can meet all the reinforced insulation guideline and it can be used in any envelope of any region in Korea. 2) As a result of the test of incombustion and gas toxicity, fiber glass core VIP was suitable for incombustible material. 3) As the test result for the long term thermal conductivity, fiber glass core VIP was found out that it would keep above 10 times insulating performance than polystyrene foam and glass fiber. 4) To meet the thermal transmittance of 0.12W/㎡K, limited-combustible insulation of expanded polystyrene foam and phenolic foam should be used respectively as thick as above 280mm and 170mm, incombustible VIP can meet the same insulation level with 20mm thickness. 5) The price competitiveness of incombustible VIP to meet the thermal transmittance of 0.12W/㎡·K was about 1,500won/㎡ higher than that of phenolic foam.

Environmental Problems and Recycling Technology for PS Resins (PS수지의 환경부하 및 그 RECYCLE기술)

  • 김정호
    • Resources Recycling
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    • v.6 no.2
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    • pp.60-69
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    • 1997
  • The paper lists various polymcr materials and lheir usage. It also presents the current stahls and projected estimation of the production of thzse resins and problems associated with these resins. A special section has been dedicated towards the problems associated with and recycle strategies for EPS. It also reviews various technologies treating PS resins.

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A Study on the Application of Thermal Insulation Composite Frame for Welding in Enclosed Space (밀폐 공간에서 용접작업을 위한 단열 복합재 프레임의 설계 적용 연구)

  • Lee, Jae-Youl;Jeong, Kwang-Woo;Hong, Sung-Ho;Shin, Kwang-Bok
    • Composites Research
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    • v.31 no.5
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    • pp.227-237
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    • 2018
  • In this paper, the design application for the lightweight and insulation of the manipulator of the mobile welding robot for the closed/narrow space is presented. A variety of robotic platforms have been developed for weld-worker using a welding robot outside a workpiece for welding work in a complex and narrow space such as a ship or an offshore plant. Normally, The development process of robots consists of machine development, electronic device development, control algorithm development and integration verification considering application environment and requirements. In order to develop the robustness of the welding robot, the lightweight design of the robot manipulator considering the environmental conditions was performed in the basic design of the robot platform. Also, The results of the robot selection and validation, analysis and testing for the insulation performance and cooling performance and the results of the research are shown.

A Study on Fire Risk of Multi-family Apartment Houses Constructed with the Exterior of the EIFS (외단열시스템 외장재로 시공된 다세대 공동주택의 화재위험에 관한 연구)

  • Min, Se-Hong
    • Fire Science and Engineering
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    • v.27 no.3
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    • pp.60-65
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    • 2013
  • EIFS system has the merit of low construction cost and shortening of construction period by easy-to-construct. For such reasons as mentioned above, it has been using across the board such as residential building, school, officetel, building remodeling and so on. It, however, has a drawback of generating plenty of combustible gases from styrofoam which is main material of it. In this regard, measures to prevent losses of life from combustible gases are needed urgently as fires on residential buildings applied EIFS caused human casualties resulted from combustible gases. With respect to the above, this study will analyze the risk of fires on residential facilities, such as multi-family apartment houses, schools and other buildings, applied EIFS which is the most frequently used as material of exterior wall and suggest countermeasure of it.

Thermal analysis of two main CCS(cargo containment system) insultaion box by using experimental thermal properties (실험적 열적 물성치를 반영한 CCS 방열박스의 열전달 해석)

  • Choi, Sung-Woong;Roh, Jeong-U;Kim, Moo-Sun;Lee, Woo-Il
    • Journal of the Computational Structural Engineering Institute of Korea
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    • v.24 no.4
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    • pp.429-438
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    • 2011
  • In this paper, experiment of thermal conductivity among thermal properties for CCS insulation material was carried out under the condition ranged from room temperature to cryogenic temperature. CCS insulation system should be sustained under cryogenic temperature($-163^{\circ}C$), and lots of investigations will be conducted how to block the heat to insulation material. CCS components which consist of various materials are especially the main interests, and how the temperature of the entire CCS along the location is should be investigated through these studies. With the experimental thermal properties, the steady state thermal analysis of the entire cargo system was conducted. When the LNG leaked through the insulation system with external impact, temperature distribution and thermal safety of secondary barrier, especially plywood and hull structure, was observed.