PVC yog ib qho ntawm cov yas siv ntau tshaj plaws hauv kev lag luam. Plasticol, ib lub tuam txhab Italian nyob ze Varese tau tsim cov PVC granules tau ntau tshaj 50 xyoo tam sim no thiab cov kev paub dhau los tau tso cai rau lub lag luam kom tau txais kev paub tob heev uas peb tam sim no tuaj yeem siv nws los ua kom tau raws li txhua tus neeg siv khoom thov los muab cov khoom tshiab thiab txhim khu kev qha.
Qhov tseeb tias PVC siv dav rau kev tsim ntau yam khoom sib txawv qhia tau tias nws cov yam ntxwv tseem ceeb muaj txiaj ntsig zoo thiab tshwj xeeb. Cia peb pib tham txog qhov ruaj khov ntawm PVC: cov khoom siv yog tawv heev yog tias ntshiab tab sis nws hloov pauv tau yooj yim yog tias sib xyaw nrog lwm yam khoom. Qhov tshwj xeeb no ua rau PVC haum rau kev tsim cov khoom siv hauv ntau qhov chaw, los ntawm kev tsim kho mus rau kev tsheb.
Txawm li cas los xij, tsis yog txhua yam tshwj xeeb ntawm cov khoom no yooj yim. Qhov kub yaj ntawm cov polymer no qis heev, uas ua rau PVC tsis haum rau cov chaw uas muaj qhov kub siab heev.
Tsis tas li ntawd xwb, tej yam txaus ntshai kuj tshwm sim los ntawm qhov tseeb tias, yog tias kub dhau, PVC yuav tso cov tshuaj chlorine tawm ua hydrochloric acid lossis dioxin. Kev sib cuag nrog cov tshuaj no yuav ua rau muaj teeb meem kev noj qab haus huv uas kho tsis tau.
Yuav kom cov polymer sib xws nrog nws cov khoom lag luam, nws tau sib xyaw nrog cov stabilizers, plasticisers, colorants, thiab lubricants uas pab hauv cov txheej txheem tsim khoom nrog rau kev ua kom PVC yooj yim dua thiab tsis tshua muaj kev hnav thiab tsim kua muag.
Vim nws cov yam ntxwv thiab nws qhov txaus ntshai, cov PVC granules yuav tsum tau tsim tawm hauv cov chaw tsim khoom tshwj xeeb. Plasticol muaj cov kab ntau lawm tshwj xeeb rau cov khoom siv yas no.
Kauj ruam thawj zaug ntawm kev tsim cov PVC granules yog kev tsim cov raj ntev ntawm cov khoom siv los ntawm lub Hoobkas extrusion tshwj xeeb. Kauj ruam tom ntej yog txiav cov yas ua cov hlaws me me. Cov txheej txheem no yooj yim heev, tab sis nws yog ib qho tseem ceeb heev uas yuav tsum ceev faj thaum tuav cov khoom siv, ua raws li cov kev ceev faj tseem ceeb uas yuav ua rau nws nyuaj dua.
Lub sijhawm tshaj tawm: Kaum Ib Hlis-23-2022