Taw qhia
Thaum ua haujlwm hauv chav kuaj, kev nyab xeeb yog qhov tseem ceeb tshaj plaws. Qhov no suav nrog kev muaj cov cuab yeej tiv thaiv zoo xws li hnab looj tes, tsom iav, thiab cov tsho tiv no. Tab sis yuav ua li cas yog tias lub tsho tiv no ntawm lub lab nws tus kheej yog qhov txaus ntshai? Ib qho kev txhawj xeeb uas tshwm sim yog seb cov tsho uas siv tau pov tseg puas yog flammable. Nyob rau hauv tsab xov xwm no, peb yuav tshawb xyuas cov chemistry tom qab flammability thiab tshawb xyuas seb cov tsho uas siv tau pov tseg puas muaj kev nyab xeeb los siv hauv chav kuaj.
Dab tsi yog flammability?
Flammability yog lub peev xwm ntawm ib yam khoom mus ntes hluav taws los yog ignite nyob rau hauv lub xub ntiag ntawm lub tshav kub los yog nplaim taws. Qhov degree ntawm flammability tuaj yeem txiav txim siab los ntawm lub teeb nyem, uas yog qhov kub thiab txias ntawm cov khoom uas muab cov pa tawm txaus los tsim cov khoom sib xyaw nrog huab cua. Ib yam khoom uas muaj qhov taw tes qis qis yog cov nplaim taws ntau dua, thaum cov khoom uas muaj qhov taw tes siab flash yog tsawg dua.
Flammability yog ib yam khoom uas txawv ntawm cov khoom sib txawv. Qee cov ntaub ntawv, xws li ntoo thiab ntawv, yooj yim ignite ntawm kub hauv qab 200 degree, thaum lwm tus, xws li hlau thiab ceramics, yuav tsum tau kub ntau dua rau ignite.
Cov tsho pov tseg pov tseg yog dab tsi?
Cov tsho pov tseg pov tseg yog ib hom khaub ncaws tiv thaiv uas hnav tshaj cov khaub ncaws tsis tu ncua hauv chav kuaj. Lawv yog tsim los ntawm ntau yam ntaub ntawv, xws li polypropylene, polyester, thiab polyethylene. Cov tsho tiv no pov tseg yog tsim los hnav ib zaug thiab muab pov tseg kom tiv thaiv kev sib kis thiab kis ntawm cov khoom phom sij.
Puas yog pov tseg lab coats flammable?
Lub flammability ntawm pov tseg lab lub tsho yog nyob ntawm cov khoom uas lawv tau ua. Polypropylene thiab polyester yog inherently nplaim-retardant, txhais tau hais tias lawv nyuaj rau ignite thiab yuav tua tus kheej yog tias lawv ntes hluav taws. Cov ntaub ntawv no muaj cov ntsiab lus siab flash thiab pom tias muaj kev nyab xeeb los siv hauv chav kuaj.
Polyethylene, ntawm qhov tod tes, tsis yog nplaim taws-retardant. Nws muaj qhov taw tes qis qis thiab yooj yim rau ignite, ua rau nws muaj peev xwm hluav taws kub. Txawm li cas los xij, ntau lub tsho pov tseg uas tau ua los ntawm polyethylene raug kho nrog cov nplaim hluav taws kom ua rau lawv muaj kev nyab xeeb dua. Cov nplaim hluav taws no ua haujlwm los ntawm kev ntxiv cov tshuaj rau cov polyethylene uas ua rau nws tsis tshua muaj hluav taws kub thiab qeeb kom hlawv.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias thaum lub tsho tiv no pov tseg yuav raug kho nrog cov nplaim hluav taws, lawv tsis muaj hluav taws kub. Nyob rau hauv cov xwm txheej hnyav, xws li raug rau qhov chaw kub ntev los yog khaus, lawv tseem tuaj yeem ntes hluav taws thiab hlawv. Yog li ntawd, nws yog ib qho tseem ceeb uas yuav tsum tau ceev faj thaum ua hauj lwm nrog cov khoom muaj kev phom sij kom txo tau qhov hluav taws kub.
Lwm qhov kev txiav txim siab txog kev nyab xeeb thaum siv cov tsho uas siv pov tseg
Thaum flammability yog ib qho tseem ceeb rau kev txiav txim siab thaum siv lub tsho pov tseg, muaj lwm yam kev nyab xeeb uas yuav tsum tau coj mus rau hauv tus account. Cov tsho pov tseg pov tseg yuav tsum haum snugly thiab npog tag nrho lub cev txhawm rau muab kev tiv thaiv txaus tiv thaiv kev tawg thiab nchuav. Lawv yuav tsum tau ua los ntawm cov khoom siv tsis zoo rau cov tshuaj siv hauv chav kuaj, thiab yuav tsum tau hloov tsis tu ncua txhawm rau tiv thaiv kev sib kis.
Tsis tas li ntawd, nws yog ib qho tseem ceeb uas yuav tau ua raws li cov txheej txheem pov tseg kom raug thaum muab cov tsho uas siv los pov tseg. Lawv yuav tsum muab tso rau hauv ib lub hnab ntawv lossis lub thawv thiab muab pov tseg raws li cov cai hauv zos. Kev tsis pov tseg cov tsho hauv chav kuaj kom zoo tuaj yeem ua rau muaj kev sib kis ntawm ib puag ncig thiab muaj kev phom sij rau kev noj qab haus huv.
Xaus
Cov tsho tiv no pov tseg yog ib feem tseem ceeb ntawm kev nyab xeeb hauv chav kuaj, muab kev tiv thaiv kev phom sij xws li tshuaj lom thiab txaws. Txawm hais tias qee cov ntaub ntawv siv los ua cov tsho uas siv pov tseg yog cov nplaim hluav taws, lwm tus xav tau kev kho mob ntxiv txhawm rau txhawm rau pom tias muaj kev nyab xeeb. Polyethylene, ib qho khoom siv siv hauv cov tsho pov tseg, tsis yog nplaim hluav taws, tab sis tuaj yeem kho nrog cov nplaim hluav taws kub hnyiab kom nws siv tau zoo dua. Txawm li cas los xij, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias txawm tias cov khoom siv hluav taws xob tsis zoo yog qhov tsis muaj hluav taws kub thiab yuav tsum tau ceev faj kom txo qis kev pheej hmoo ntawm hluav taws. Los ntawm kev ua raws li cov txheej txheem kev nyab xeeb kom raug thiab pov tseg cov tsho hauv lab siv raws li cov cai hauv zos, cov neeg ua haujlwm hauv chaw kuaj mob tuaj yeem pab ua kom muaj kev nyab xeeb thiab noj qab nyob zoo hauv kev ua haujlwm.
