Thawj thawj zaug PVC tau pom yog los ntawm kev sib tsoo hauv xyoo 1872 los ntawm German chemist, Eugen Baumann.Nws tau raug tsim los ua ib lub khob ntawm cov yas chloride raug tso tawm rau hnub ci qhov twg nws polymerized.
Nyob rau hauv lub lig 1800s ib pab pawg neeg ntawm German ua lag luam txiav txim siab los nqis peev thiab tsim loj npaum li cas ntawm Acetylene, siv los ua roj nyob rau hauv lub teeb.Nyob rau hauv parallel kev daws teeb meem tau ua kom muaj txiaj ntsig thiab tsis ntev dhau los ua lag luam.Nrog rau qhov no Acetylene muaj nyob rau hauv ntau thiab tsawg tus nqi.
Nyob rau hauv 1912 ib tug German chemist, Fritz Klatte, sim nrog cov tshuaj thiab reacted nrog hydrochloric acid (HCl).Cov tshuaj tiv thaiv no yuav tsim cov vinyl chloride thiab tsis muaj lub hom phiaj meej nws tso rau ntawm lub txee.Lub vinyl chloride polymerized dhau sij hawm, Klatte muaj lub tuam txhab nws ua haujlwm rau, Greisheim Electron, los patent nws.Lawv tsis pom muaj kev siv rau nws thiab patent tas rau xyoo 1925.
Kev ywj pheej lwm tus kws tshuaj hauv Asmeskas, Waldo Semon ua haujlwm ntawm BF Goodrich, tau tshawb pom PVC.Nws pom tias nws tuaj yeem yog cov khoom siv zoo tshaj plaws rau cov ntaub thaiv da dej thiab lawv tau ua daim ntawv patent.Ib qho ntawm cov yam ntxwv tseem ceeb yog cov dej tsis muaj dej uas ua rau muaj ntau qhov kev siv thiab PVC tau loj hlob sai hauv kev lag luam.
PVC granule yog dab tsi thiab nws siv qhov twg?
PVC yog cov khoom siv raw uas tsis tuaj yeem ua tiav ib leeg piv rau lwm cov ntaub ntawv raw.PVC granules tebchaw yog raws li kev sib xyaw ntawm cov polymer thiab cov khoom ntxiv uas muab cov qauv tsim nyog rau kev siv kawg.
Lub rooj sib tham nyob rau hauv kev sau cov additive concentration yog raws li nyob rau hauv ib puas feem pua ntawm cov PVC resin (phr).Lub compound yog tsim los ntawm intimately sib xyaw ua ke cov khoom xyaw, uas yog tom qab hloov dua siab tshiab rau hauv lub gelled tsab xov xwm nyob rau hauv lub zog ntawm tshav kub (thiab shear).
PVC tebchaw tuaj yeem tsim tau, siv cov yas yas, rau hauv cov ntaub ntawv hloov tau, feem ntau hu ua P-PVC.Cov mos mos lossis hloov tau yooj yim PVC feem ntau yog siv hauv khau, kev lag luam cable, flooring, hose, khoom ua si thiab hnab looj tes.
Cov tshuaj uas tsis muaj plasticizer rau cov ntawv thov nruj yog tsim los ntawm U-PVC.Rigid PVC feem ntau yog siv rau cov kav dej, qhov rais profiles, phab ntsa npog, thiab lwm yam.
PVC tebchaw yog ib qho yooj yim rau txheej txheem ntawm kev txhaj tshuaj molding, extrusion, tshuab moulding thiab sib sib zog nqus daim duab.INPVC tau tsim cov khoom siv tau yooj yim PVC sib txuas nrog cov dej ntws zoo heev, zoo tagnrho rau kev txhaj tshuaj molding, nrog rau cov qib viscous rau extrusion.
Post lub sij hawm: Jun-21-2021
