Thaum lub sijhawm ua thiab kev tsim cov khoom siv ntawm cov khoom PVC, qee tus neeg siv qee zaum tsa qee cov lus nug: Vim li cas cov dej ntawm PVC cov khoom lag luam Kuv tsim dej? Vim li cas nws thiaj li txawm tias kuv tau siv dehumidifiers nyob rau hauv cov ntaub ntawv raw, tseem tshuav "dej tau tawm" ntawm qhov chaw ntawm kuv cov khoom? Thaum lub sijhawm ua lossis siv PVC Resin thiab cov khoom siv rov ua dua tshiab (rov ua dua tshiab), ib qho "tsis txaus siab yuav tshwm sim nyob rau ntawm cov khoom. Qhov tshwm sim no tseem hu ua cov nag lossis daus, kev ua kom txaus siab tshwm sim lossis qhov tshwm sim ntub ntawm cov khoom nto. Hauv qab no, peb yuav tshuaj xyuas qhov ua kom ua rau cov xwm txheej uas yuav ua rau cov xwm txheej no!
· Muaj teeb meem nrog tus thib ob nws tus kheej
①residual Qes - molecular - qhov hnyav
Unreacted monomers (VCM), oligomers lossis cov tshuab yas ntim hauv cov khoom siv ntau lawm los yog ntev}}}} ishipitates (zoo ib yam li cov dej ntws).
Yuav daws nws li cas:Xaiv cov siab - purity pvc resin (xws li ncua sij hawm, nrog residual vcm <1ppm)
②insufficient Thermal ruaj khov
PVC yog tus nquag txiav txim siab thaum lub sijhawm ua, tsim cov roj hcL. Yog tias tsis muaj cua sov stabilizers (xws li cov khoom muag txhuas txhuas cov khoom siv tau yooj yim ua ke nrog dej los ua cov kua qaub.
Yuav daws nws li cas:Kev tsim nyog ua kom muaj kev tsim nyog rau cov tshuaj tua hluav taws xob ntawm cov cua sov stabilizer lossis compound ua kom muaj zog ntxiv.
· Inerent tsis muaj peev xwm ntawm cov khoom siv rov ua dua tshiab
①imprities thiab cov khoom lag luam tsis zoo
Cov khoom siv uas ua dua muaj cov roj hmab uas muaj cov roj hmab uas muaj cov neeg muaj kuab paug), lim (roj stickinate), thiab lwm yam), thiab lwm yam.
Yuav daws nws li cas:Nruj me ntsis ntxuav cov khoom siv uas siv tau thiab ntxiv adsorbents (xws li actived carbon) kom tshem tawm impurities.
②MOLECATULAR BINK
Ntau txoj kev ua rau qhov tsis zoo ntawm PVC molecular chains, generating ntau qhov qis {{molecular {}} cov tshuaj hnyav thiab ua kom nrawm dua kev tsiv teb chaws.
Yuav daws nws li cas:Txwv txiav cov feem ntawm cov khoom siv ua rov qab thiab ntxiv cov sawv cev (xws li CPE) tib lub sijhawm.
· Charmula thiab cov txheej txheem ua haujlwm
①excive condizer lossis tsiv teb tsaws
Phthalate planizers (xws li dop) muaj kev sib txawv, tshwj xeeb tshaj yog nyob rau hauv high {{}} {} {} high shows shows shows្ត environ shows shows "" tawm hws ".
Yuav daws nws li cas:Hloov mus rau qhov siab - molecular - nyhav yooj yim tshuab lossis polyester-
②lubrical tsis ncaj
Cov roj nplua nyeem ntau dhau (xws li PE wax) yuav daus, ua cov hmoov nplej dawb lossis roj roj.
Yuav daws nws li cas:Txhim kho lubrication system (qhov sib piv ntawm lubrication sab hauv thiab sab nraud), xws li compounding oxidized polyethylene siv yeeb yaj kiab (ope quav ciab).
Tam sim no ua qhov kub siab dhau lawm
Thaum qhov ntsuas kub tshaj 190 degree, qhov kev txiav txim siab ntawm PVC intensifies, thiab cov tshuaj tsw heev thiab ua rau qhov chaw.
Yuav daws nws li cas:Tswj cov extrusion / txhaj tshuaj molding kub (160 {{}} 180 Qib), thiab siv cov neeg sawv cev tsawg (xws li NC foaming tus sawv cev).
· Tej yam khoom ib puag ncig
①THTHE COMPORT NTAWM COV KUB KUB
PVC cov khoom nqus noo noo nyob hauv ib puag ncig av, thiab ntxiv li CACO3) tej zaum yuav pom cov dej tom qab nqus dej noo.
Yuav daws nws li cas:Ntxiv cov desiccant lossis sab saum toj txheej kho.
Agtemperatature Qhov sib txawv
Thaum cov khoom raug nthuav tawm los hloov cov chaw txias thiab cov dej sov (xws li ntim cov dej hauv tub yees), cov dej ntws ntawm qhov saum npoo yog qhov yuam kev uas yog "tsis sib haum xeeb.
Yuav daws nws li cas:Txhim kho cov huab cua kev siv cua ntawm cov ntim lossis siv cov anti -} cov tshuaj condensation.
Los ntawm kev tshawb xyuas cov khoom siv PVC, siv cov khoom siv, cov qauv thiab cov khoom noj rau ntawm cov khoom lag luam "ntawm cov khoom lag luam"