Kev nyab xeeb yuav tsum tau hloov pauv polyurethane ua npuas ncauj
(1) Txhawm rau tswj qhov kub thiab txias. Kev tsim cov polyurethane ua npuas ncauj yooj yim yog cov txheej txheem exothermic cov tshuaj tiv thaiv, tshwj xeeb tshaj yog cov tshuaj tiv thaiv ntawm toluene diisocyanate nrog dej yuav tsim kom muaj cua sov ntau. Thaum qhov kub siab tshaj 200 degree, carbon monoxide thiab cawv raug tso tawm thiab pib hlawv hauv qhov chaw, feem ntau hu ua "mob siab". Thaum cov polyurethane ua npuas ncauj hloov tau hluav taws kub, nws kis tau sai. Raws li kev sim, 400 kilograms ntawm npuas tuaj yeem hlawv tawm hauv 5 feeb. Yog li ntawd, nyob rau hauv cov txheej txheem ntau lawm, peb yuav tsum tau them sai sai rau qhov kev hloov ntawm qhov kub thiab txias thiab ntsuas kub ceev hauv lub sijhawm. Nyob rau lub caij kub kub, me me ntawm cov tshuaj tiv thaiv antioxidant Freon Ⅱ tuaj yeem ntxiv los ua kom cov cua sov ua kom sai.
(2) Ua tib zoo xaiv cov khoom siv raw. Cov khoom sib txawv muaj qhov sib txawv exothermic. Kev siv cov dej uas muaj cov polyether siab (ester) yog ib qho yooj yim los tsim kom muaj cua sov. Kev tsim cov khoom lag luam uas tsis tshua muaj siab yuav tsum muaj dej ntau thiab tseem muaj cua sov. Yog li ntawd, thaum hloov cov roj tshiab, ib qho kev sim me me yuav tsum tau ua, thiab kev soj ntsuam yuav tsum muaj zog. Thaum tsim cov khoom siv tsawg, yuav tsum tau saib xyuas tshwj xeeb rau kev nyab xeeb hluav taws.
(3) Nws yog ib qho tsim nyog yuav tsum nruj me ntsis tswj cov txheej txheem qauv. Nyob rau hauv cov txheej txheem ntau lawm, tus qauv piv tsis tiav, thiab nws yog ib qho yooj yim los tsim kom muaj cua sov. Piv txwv li, lub active catalyst yog ntxiv los yog tus nqi ntawm polyether (ester) yog tsis txaus, tshwj xeeb tshaj yog cov piv ntawm hydroxyl thiab isosine ester yog tsis sib npaug, los yog lub stirring yog tsis sib xws. nruj me ntsis raws li tus txheej txheem qauv los tiv thaiv ntau lawm. Tsis ncaj proportions.
(4) Lub rooj cob qhia yuav tsum ua kom tau raws li qhov yuav tsum tau ua. Lub rhiav kev tsim khoom yuav tsum muaj qhov cua zoo los tiv thaiv tshav ntuj ncaj qha, cov khoom siv hluav taws xob yuav tsum ua kom tau raws li qhov yuav tsum tau ua kom tawg, thiab cov khoom siv thiab cov khoom seem tsis raug tso cai rau hauv lub rhiav. Lub rooj cob qhia ntau lawm yuav tsum tau teem caij sib cais los ntawm lwm lub tsev thiab ua kom muaj kev nyab xeeb nyob deb.
(5) Kev ruaj ntseg cia yuav tsum. Cov khoom tsim tawm tshiab tseem muaj qhov kub thiab txias dua, thiab qee cov ntaub ntawv tsis ua tiav yog tseem exothermic, thiab yuav tsum tau txias tag nrho (feem ntau tshaj 24 teev) ua ntej muab tso rau hauv cia. Lub tsev khaws khoom yuav tsum ua kom tau raws li cov kev cai ntawm kev nyab xeeb hluav taws xob, muaj qhov cua zoo, ua tib zoo saib xyuas kev tiv thaiv tshav kub thiab txias thaum lub caij ntuj sov, tsis txhob raug tshav ntuj ncaj qha, tawm ntawm qee qhov kev nyab xeeb ntawm kev sib tsoo thiab stacking, thiab lub qhov rooj warehouse yuav tsum qhib sab nraud.
(6) Cov neeg ua haujlwm zoo yuav tsum tau ua. Rau qhov hloov pauv ntawm polyurethane ua npuas ncauj ntau lawm, cov neeg ua haujlwm yuav tsum tau txais kev cob qhia kev nyab xeeb tom qab hluav taws, thiab tsuas tuaj yeem ua haujlwm tom qab dhau qhov kev xeem. Lawv yuav tsum ua raws li lawv cov haujlwm thaum ua haujlwm. Cov thawj coj hauv tsev yuav tsum nkag siab txog cov yam ntxwv ntawm cov khoom siv hluav taws xob thiab cov txheej txheem tua hluav taws uas hloov tau yooj yim polyurethane ua npuas ncauj, ua tib zoo ua raws li cov cai ntawm hluav taws xob thiab hluav taws xob kev nyab xeeb, thiab nruj me ntsis txwv tsis pub foob pob hluav taws kom muaj kev nyab xeeb.
Nyob rau hauv cov txheej txheem ntau lawm, cov ntaub ntawv hloov pauv ntawm polyurethane ua npuas ncauj yuav ua rau hluav taws kub nyhiab, uas yuav ua rau muaj kev puas tsuaj rau tib neeg lub neej thiab kev nyab xeeb ntawm vaj tse. Yog li ntawd, peb yuav tsum tau xyuam xim rau qhov zoo ntawm cov khoom siv raw, feem ntawm cov khoom xyaw, kev tswj xyuas, cov chaw cog, thiab lwm yam kom tsis txhob muaj qhov tshwm sim ntawm hluav taws kub.
