Cov hauv qab no yog kev tshuaj xyuas ntawm kev siv cov methyl tin stabilizers hauv PVC ua, raws li lawv cov yam ntxwv kev ua tau zoo thiab kev coj ua hauv kev lag luam:
1, Cov xwm txheej ntawm daim ntawv thov thiab kev hloov kho thev naus laus zis
1. Kev ua cov khoom tawv pob tshab
Haum rau cov ntawv PVC pob tshab, cov laug cam, cov yeeb yaj kiab cua sov siab thiab lwm yam khoom, siv nws qhov kev sib raug zoo nrog PVC resin, cov khoom xa tawm lub teeb tuaj yeem ncav cuag ntau dua 90%, thiab tsis muaj nag lossis daj tshwm sim.
2. Cov txheej txheem ib txwm muaj: dov ua, extrusion ua
Cov mis pom zoo: Ntxiv tus nqi 1.2-1.6 phr (siv zaj duab xis tuab 0.1-0.3 hli ua piv txwv)
3. Kev tsim cov kav dej thiab cov profile
Siv rau cov ntaub ntawv tsim kho xws li cov kav dej xa dej thiab cov qhov rooj yas thiab qhov rai, nws tuaj yeem tiv thaiv qhov oxidation thiab decomposition ntawm PVC thaum lub sijhawm ua tiav los ntawm kev ruaj khov thermal ntev, thiab txuas ntxiv lub neej tiv thaiv huab cua ntawm cov khoom los ntawm ntau dua 30%.
4. Khoom noj khoom haus / tshuaj ntim teb
Ua raws li EU ROHS thiab US ASTM D3421 cov qauv kev huv, siv rau hauv cov thawv ntim khoom noj, cov fwj ntim tshuaj, thiab lwm yam, cov khoom muaj cov hlau hnyav tsawg dua 0.1 ppm.
2, Kev sib piv ntawm cov txiaj ntsig ntawm daim ntawv thov
| Kev ntsuas kev ua tau zoo | Methyl tin stabilizer | Cov tshuaj stabilizer ntsev txhuas ib txwm muaj |
| Cov yam ntxwv xim pib | Dej ntshiab | Ua rau yellowing |
| Kev ua haujlwm ruaj khov ntawm thermal | Lub sijhawm ntev (≥ 180 ℃ kev ruaj khov tas mus li) | Muaj kev pheej hmoo siab ntawm kev ua tsis tiav hauv nruab nrab lub sijhawm |
| Kev nyab xeeb thiab kev phooj ywg ib puag ncig | Lub sijhawm ntev (≥ 180 ℃ kev ruaj khov tas mus li | Cov kuab paug ntawm cov hlau lead/cadmium |
| Kev ua tau zoo | Sib xws nrog tag nrho cov txheej txheem ntawm PVC tawv / mos | Tsuas yog rau cov khoom tawv |
Lus Cim: Cov ntaub ntawv no yog los ntawm kev sib piv ntawm cov kev ntsuas tiag tiag uas cov tuam txhab ua PVC ua hauv tsev thiab thoob ntiaj teb ua.
3. Txoj kev npaj ua kom zoo tshaj plaws rau kev hloov kho cov txheej txheem
1. Kev tsim qauv sib xyaw ua ke
Feem ntau siv ua ke nrog roj taum pauv epoxidized (3-5 phr) thiab calcium stearate (0.5-1 phr) los txhim kho cov dej ntws thiab txo cov nqi torque.
2. Kev tswj kub thaum lub sijhawm ua tiav
Nws raug pom zoo kom teeb tsa qhov kub thiab txias hauv ntu (160-185 ℃) kom tsis txhob muaj kev lwj ntawm cov pab pawg thiol los ntawm kev tshaj 210 ℃.
3. Kev kho mob uas tsis muaj dej noo
Thaum khaws cia, qhov av noo ib puag ncig yuav tsum khaws cia qis dua 60%. Ua ntej ua tiav, cov khoom siv PVC raw yuav tsum tau ziab ntawm 80 ℃ rau 2 teev kom tiv thaiv kev ua tsis tiav ntawm hydrolysis.
(Ceeb Toom: Cov khoom no yog cov kua nplaum tsis muaj xim thiab yuav tsum tau khaws cia rau hauv ib txoj kev kaw kom deb ntawm lub teeb.)
Lub sijhawm tshaj tawm: Tsib Hlis-19-2025
