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1. Ntxiv cov yas yas (feem ntau siv cov qauv)
Hom Hom Khoom Siv:
Ib qho piv txwv yog DOP (Dioctyl phthalate) thiab decp (dijinionyl phthalate) rau tus nqi qis, txawm li cas los xij, lawv muaj kev txhawj xeeb txog kev noj qab haus huv. Phthalic acid esters. ESO nrog rau ATBC Citric Acid Ester yog ib qho piv txwv ntawm cov kab ke ib puag ncig zoo thiab muaj kev lees paub rau kev tiv tauj cov zaub mov lossis kev kho mob. Polymeries cov roj hmab xws li cov ntoo muaj zog muaj cov kev tsiv teb tsaws chaw zoo ua rau lawv haum rau kev siv ntev.
Ntxiv RATIOIDE:
Tus nqi ntawm cov yas ua tau ntxiv yog feem ntau 30% ~ 70% ntawm PVC Resin. Qhov siab dua qhov sib piv, cov softer cov khoom.
Piv txwv li: Lub Cryizer cov ntsiab lus ntawm lub zog PVC yog li 10%, thiab cov muag muag pvc tau ncav cuag ntau dua 50%.
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2. Muag muag los ntawm cov cua kub (ib ntus)
Los ntawm cov cua sov, kev ua ntawm PVC molecular chains yog txhim kho thiab lawv tau ua ib ntus muag (lawv yuav rov qab mus rau lawv cov thawj lub xeev tom qab txias):
Muaj feem xyuam nrog cov xwm txheej: Kho cov khoom siv tawv PVC (xws li cov kav dej thiab ntaub pua rooj).
Cov kauj ruam ua haujlwm:
Siv cov tshuab ziab plaub hau lossis cua kub kub kom muaj cua daj cua dub rau 60 ~ 80 degree (zam kev sib deev los tiv thaiv kev lom zem).
Ncab lossis cov duab thaum kub, thiab cov duab tom qab txias.
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3. Kho cov khoom kub
Thaum lub sijhawm tsim khoom lossis kev tsim khoom ntawm PVC, tswj qhov kub yuav cuam tshuam kev muag khoom muag:
Tasning kub: sheate rau qhov extrusion lossis txhaj tshuaj yuav tsum tau txo qis kev tsim nyog (piv txwv li 180 degrees cov saw entangles thaum txhim kho softness.
Cua txias: Kev ua kom nruj ntawm cov khoom siv tau ntxiv thaum tus nqi txias tau qeeb, kom cov molecular chains muaj peev xwm so.
4. Blending Hloov Kho
Sib tov sib xyaws PVC nrog lwm lwm cov polymer kom haum rau kev txhim kho cov muag muag tag nrho:
Feem ntau siv cov khoom xyaw:
TPU (thermoplastic polyurethane): txhim kho kom tau yooj yim, thiab txhawb kom lub siab ntev.
Eva (Ethylene-Vinyl acetate): Ua kom muaj kev hloov pauv thiab txhim kho kev cuam tshuam tsis kam.
NBR (Nitrile Roj Hmab): Txhim Kho Yooj Yim ntawm kev txo qis kub.
5. Sab saum toj kho
Ntxiv lubricants los txo kev sib txhuam sab hauv thiab tsis ncaj ncees txhim kho mos mos kov:
Cov roj nplua nyeem sab hauv lubricts: xws li calaffe stearate thiab paraffin, txo kev sib txhuam ntawm molecular chains.
Cov roj nplua nyeem sab nraud: xws li roj silicone, txhim kho saum nplaim dog.
6. Restore laus thiab tawv tawv PVC
Nyob rau hauv rooj plaub no ua kom nruj vim yog yas yasnizer volatilization lossis oxidation, cov hauv qab no yuav pab tau:
Yas ua kom: qhov chaw ua si plooj (venterain) hauv cov yas (rau cov roj epoxidized, roj epoxidized, rau ib hnub los hloov qee qhov ntawm cov khoom sib cais.
So nrog glycerol: so cov npoo nrog glycerin daws (glycerin: Dej} {}}}}}}
