Hydrochlorofluorocarbon (HCFC) is an ozone-depleting substance that is subject to environmental regulations based onthe Montreal Protocol, and in Republic of Korea, which is regarded as a developing country, its use will be restricted inphase starting in 2013 until finally being prohibited in 2030. HCFC is regulated Based on the Tokyo Protocol, HCFC isa regulated construction material for carbon dioxide reduction with GWP of 1,700~2,400 times that of CO2, with a GWPof 1. Using the CO2 in the heat insulating material in the extrusion process conditions are the first extruder, the polystyreneresin (melting point) and the blowing agent (CO2:Ethanol:HCFC) as interval (Mixing zone) which is the combinedpressure 11.0MPa, temperature 200oC, second within the extruder discharge pressure 6.5 MPa, and determines that it isdesirable to set the temperature of 115oC, the blowing agent mixing ratio (CO2:Ethanol:HCFC), taking into account thestability of the thermal conductivity of 30:20:50%, 25:25:50% is expected to be utilized in the foaming agent.

Abstract
 I. 서 론
 II. 실험계획 및 방법
  1. 실험계획
  2. 사용재료 및 제조설비
  3. 실험방법
 III. 실험결과 및 고찰
  1. 열전도율
  2. 굴곡파괴하중
  3. 압축강도
  4. 투습계수
  5. Cell size 분석
 IV. 결 론
 감사의 글
 References

• 윤상혁(한국건설기술연구원 공공건축연구본부 미래건축연구실) | Sang Hyuck Yoon Corresponding author
• 송태협(한국건설기술연구원 공공건축연구본부 미래건축연구실) | Tae Hyeob Song
• 이세현(한국건설기술연구원 공공건축연구본부 미래건축연구실) | Sea Hyun Lee