Video: Puas yog polyurethane yog cov khoom siv phom sij?
2024 Tus sau: Stanley Ellington | [email protected]. Kawg hloov kho: 2023-12-16 00:17
Polyurethane polymer yog ib yam khoom uas combustible thiab yuav ignited yog raug rau ib tug qhib nplaim taws. Kev raug tshuaj lom neeg uas yuav raug tso tawm thaum lub sijhawm lossis tom qab siv polyurethane Cov tshuaj tsuag ua npuas dej (xws li isocyanates) muaj teeb meem rau tib neeg kev noj qab haus huv thiab yog li yuav tsum tau ceev faj tshwj xeeb thaum lub sijhawm thiab tom qab txheej txheem no.
Yog li, polyurethane puas yog hazmat?
PU ua npuas ncauj tsis raug xaiv los ua ib qho Cov khoom siv phom sij vim tias nws tsis suav tias yog ib yam khoom lossis cov khoom muaj peev xwm ua rau muaj kev phom sij lossis tsis tsim nyog rau kev noj qab haus huv, kev nyab xeeb, thiab khoom vaj khoom tsev thaum thauj hauv kev lag luam.
Tsis tas li ntawd, polyurethane yog dab tsi? Polyurethane yog ib tug polymer koom nrog urethane txuas. Cov kev sib txuas no yog tsim los ntawm reacting di- lossis poly-isocyanate nrog polyol. Polyurethane yog tshwj xeeb nyob rau hauv uas nws tsis yog manufactured zoo li ntau lwm yam plastics. Feem ntau cov polymers, xws li polyethylene, yog tsim nyob rau hauv daim ntawv ntawm cov hmoov thiab ces molded rau hauv ib tug xav tau daim ntawv.
Hauv qhov no, puas yog polyurethane khoom zoo?
Polyurethane yog siv nyob rau hauv cov khoom marine xws li lifeboats vim nws cov khoom tsis muaj dej. Polyurethane ntaub , sau PUL ntaub , yog waterproof ntaub , feem ntau polyester, tab sis tej zaum yuav yog paj rwb los yog polyblen khoom uas tau kub-laminated rau ib polyurethane txheej Nws yog lub teeb yuag thiab ruaj khov heev.
Puas yog polyurethane yog carcinogen?
Isocyanates yog cov khoom siv raw uas tsim txhua yam polyurethane cov khoom. Isocyanates suav nrog cov tebchaw uas muaj peev xwm ua rau tib neeg carcinogens thiab paub tias ua rau mob qog noj ntshav hauv tsiaj.
Pom zoo:
Puas yog kev tsim khoom siv nyiaj siv ua khoom muaj nqis lossis kev siv nyiaj?
Cov Nyiaj Siv Ua Haujlwm Raws Li cov nyiaj siv ua haujlwm tau raug tshwm sim tiag tiag, Lub Tsev Haujlwm Nyiaj Siv Ua Haujlwm tus as khauj raug rho tawm, thiab cov nyiaj tau los uas raug txiav txim raug tso tseg. Txhawm rau rov hais dua, Lub Tsev Haujlwm Nyiaj Siv Ua Haujlwm tus account tsis yog tus lej raug. Nws tsis sawv cev rau khoom vaj khoom tsev, kev lav phib xaub, kev siv nyiaj, lossis lwm yam ntsiab lus ntawm cov ntaub ntawv nyiaj txiag
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Lub algorithm twg yog siv los nrhiav kev sib koom ua ke ntawm cov khoom uas tus neeg siv khoom tuaj yeem yuav ntawm lub khw muag khoom?
Association Rule Mining Txoj hauv kev zoo tshaj plaws los nrhiav cov qauv no yog Kev Tshawb Fawb Kev Lag Luam Kev Lag Luam, uas yog cov txheej txheem tseem ceeb siv los ntawm cov khw muag khoom loj xws li Amazon, Flipkart, thiab lwm yam los txheeb xyuas cov neeg yuav khoom los ntawm kev nrhiav kev sib koom ua ke ntawm cov khoom sib txawv uas cov neeg siv khoom tso rau hauv lawv "kev yuav khoom. pob tawb”
Thaum twg cov khoom siv tiag tiag siv los ua cov khoom lag luam kom ruaj ntseg qiv nyiaj qiv cov ntaub ntawv?
Hauv kev qiv qiv nyiaj ruaj ntseg, ob cov ntaub ntawv tseem ceeb rau tus qiv nyiaj hauv kev ruaj ntseg. Thawj cov ntaub ntawv yog ib qho cuab yeej cuab tam uas yog siv nyob rau hauv feem ntau cov nyiaj txais qiv. Cov cuab yeej lien yog cov ntaub ntawv uas muab rau tus neeg qiv nyiaj muaj cai los txeeb cov khoom ntiag tug
Dab tsi yog cov khoom siv ncaj qha kev ua haujlwm thiab kev tsim khoom siv nyiaj siv ua haujlwm?
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