Dab tsi yog sab hauv lub qhov rooj ntoo?

Lub qhov rooj ntoo hauv tsev muaj cov ntoo sab hauv muaj Kev siv-kev siv khoom siv ua tau los ntawm cov particeboardboard, chipboard thiab / lossis cov ntoo ntoo ntooCov. Ib qho tseem ceeb yog qhov tseem ceeb yog lub suab nrov intumescent uas yog nyob ib ncig ntawm cov npoo ntawm lub qhov rooj. Lub luag haujlwm tseem ceeb ntawm lub foob yog kom nthuav dav thaum kub ncav cuag dhau 200 degree.