• Title/Summary/Keyword: Time to Ignition (TTI)

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Evaluation of Combustion Characteristics of Outdoor Advertisement Materials (옥외 광고물 소재의 연소특성 평가)

  • Eom, Sang-Yong;Kim, Kyoung-Jin;Lee, Su-Kyung
    • Fire Science and Engineering
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    • v.26 no.5
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    • pp.79-84
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    • 2012
  • Combustion characteristics of outdoor advertisement materials were evaluated for fire risk assessment about fire expanding. At this study, the flame retardancy and the limiting oxygen index (LOI) was measured by UL 94 and ASTM D 2863 respectively. At the result of flame retardancy, foamex was V-0 grade and those of others were out of grade. LOI measurement showed that the LOI of foamex was highest in the samples. The cone calorimeter test was done by ISO 5660-1 to find the combustion characteristics. The cone calorimeter test showed that the outdoor advertisement materials were not good to prevent of fire expanding. The time to ignition (TTI) of flex was the fastest and the peak heat release rate (PHRR) as well as the total heat release (THR) of acrylic panel was higher than those of others.

Fire Resistance and Thermal Stability Study of Fire-Retarded Polypropylene Systems by Using Cone Calorimeter and Thermogravimetry (콘 칼로리미터와 TGA를 이용한 할로겐 계통의 난연제를 첨가한 폴리프로필렌 수지의 난연성 및 열 안정성에 관한 연구)

  • 곽성복;정찬화;남재도;김준형;최미애
    • Polymer(Korea)
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    • v.24 no.6
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    • pp.777-786
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    • 2000
  • Fire resistance and thermal stability of polypropylene composite systems were investigated by using several halogenated fire-retardants such as decabromodiphenyl oxide (DBDPO) and chlorinated paraffin wax (CPW). The fire resistance of composite systems was thoroughly examined by measuring limited oxygen index (LOI, ASTM D2863, ISO 4589) and characteristic properties of cone calorimetry(ASTM E1354, ISO 5660) heat release rates (HRR), time to ignition (TTI), total heat release (THR), effective heat of combustion (EHC), mass loss rates, etc. Comparing the cone calorimetry experimental results of the halogen flame retardants, DBDPO exhibited twice higher efficiency than CPW in polypropylene systems, and the LOI also showed similar trends to cone calorimetry. The thermo-oxidative stability of the composite systems was increased about 30-5$0^{\circ}C$ in thermogravimetry analysis.Collectively, the combustion, extinction and thermally-stable characteristics of flame retardants were identified in this study.

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A Study on Combustion Characteristics of Flame Retardant Treated Pinus Densiflora (방염처리 육송의 연소특성 연구)

  • Choi, Jung-Min;Ro, Ho-Seung;Jin, Young-Hwa
    • Fire Science and Engineering
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    • v.25 no.3
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    • pp.57-62
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    • 2011
  • The combustion characteristic was evaluated for Pinus densiflora, used as a building material in Hanok, which were treated with two different flame retardant method. The specimen was brushed with flame retardant liquid two or three times and then let the specimen dehydrated during 24 h for spreaded treating. And the other specimen was soaked in the liquid for 72 h. The test methods were inflammability test using meker burner and heat release rate test using cone calorimeter. As a result for the tests, flame retardant treated specimens met the requirements of the inflammability and the spreaded treated method was more efficient than immersed method. The spreaded treated specimen had lower combustive properties than immersed specimen in TTI (time to ignition), PHRR (peak heat release rate), MLR (mass loss rate) and THR (total heat release).