Lubricant yog ib qho tseem ceeb ntxiv rau hauv PVC ua. Ntxiv cov roj nplua nyeem tsim nyog hauv PVC tuaj yeem txo qhov kev sib txhuam ntawm cov khoom thiab macromolecules hauv PVC yaj ua ntej PVC yaj; Txo kev sib txhuam ntawm PVC yaj thiab cov khoom siv yas sib cuag. Tsim nyog tus nqi ntawm cov roj nplua nyeem tuaj yeem txhim kho cov dej ntawm PVC yaj, txhim kho kev tsim khoom, tiv thaiv qhov degradation ntawm PVC los ntawm kev sib txhuam kub, thiab txhim kho cov khoom zoo ntawm cov khoom.
Raws li kev ua haujlwm tuaj yeem muab faib ua cov lubricants sab nraud thiab cov roj lubricants sab hauv. Lub lubricant sab nraud tsis zoo sib xws nrog PVC thiab yooj yim rau migrate los ntawm cov resin yaj sab hauv rau saum npoo, tsim cov lubricant interface txheej, yog li txo cov kev sib txhuam ntawm cov khoom thiab cov neeg kho tshuab kev sib cuag nto ntawm PVC yaj thiab yas ua ntej PVC melting. Internal lubricant muaj pawg polar, thiab muaj kev sib raug zoo nrog PVC, tuaj yeem txo cov PVC intermolecular quab yuam, txo cov viscosity yaj, txhim kho yaj fluidity.
Kev faib cov roj lubricants sab hauv thiab sab nraud tsuas yog txheeb ze, thiab tsis muaj cov qauv kev faib tawm nruj. Nyob rau hauv cov resins nrog txawv polarities, lub luag hauj lwm ntawm sab hauv thiab sab nrauv lubricants yuav hloov. Piv txwv li, cawv stearate, amine stearate, butyl stearate, thiab monotriglyceride stearate muab cov lubrication sab hauv rau cov polar resins (xws li PVC thiab PA), tab sis qhia cov lubrication sab nraud rau cov tsis yog -polar resins (xws li PE thiab PP). Ntawm qhov tsis sib xws, macromolecule paraffin thiab lwm yam polar resin compatibility yog tsis zoo, xws li nyob rau hauv polar PVC siv los ua lwm yam lubricant, thiab nyob rau hauv PE, PP thiab lwm yam uas tsis yog -polar resin yog nyob rau hauv lubricant. Ntawm qhov sib txawv ntawm kev ua haujlwm kub, lub luag haujlwm ntawm cov roj lubricants sab hauv thiab sab nraud yuav hloov pauv, xws li stearic acid thiab stearic cawv siv hauv PVC calendering molding thaum ntxov, vim qhov kub ua haujlwm tsis zoo, tsis zoo sib xws nrog PVC, feem ntau ua lub luag haujlwm sab nraud lubrication, thaum kub. nce, thiab PVC compatibility nce, yog hloov mus rau hauv lub luag hauj lwm lubricant.
