Ob qho tib si dispersants thiab lubricants yog feem ntau siv additives nyob rau hauv cov xim sib xws.Yog tias cov khoom siv ntxiv no ntxiv rau cov khoom siv raw ntawm cov khoom, lawv yuav tsum tau ntxiv rau cov khoom siv raw cov ntaub ntawv hauv tib qhov kev faib ua feem ntawm cov xim sib piv cov ntaub ntawv pov thawj, kom tsis txhob muaj xim sib txawv hauv cov khoom tom ntej.
Cov hom dispersants yog: fatty acid polyureas, base stearate, polyurethane, oligomeric xab npum, thiab lwm yam. Feem ntau siv dispersants nyob rau hauv kev lag luam yog lubricants.Lubricants muaj cov khoom tawg zoo, thiab tuaj yeem txhim kho fluidity thiab pwm tso tawm cov khoom ntawm cov yas thaum molding.
Lubricants tau muab faib ua cov lubricants sab hauv thiab cov lubricants sab nraud.Internal lubricants muaj ib co compatibility nrog resins, uas yuav txo tau cov cohesion ntawm resin molecular chains, txo yaj viscosity, thiab txhim kho fluidity.Lub compatibility ntawm sab nraud lubricant thiab cov resin, nws adheres rau saum npoo ntawm molten resin los ua ib tug lubricating molecular txheej, yog li txo cov kev sib txhuam ntawm cov resin thiab cov khoom ua.Lubricants feem ntau muab faib ua pawg hauv qab no raws li lawv cov qauv tshuaj:
(1) Cov chav kawm kub kub xws li paraffin, polyethylene wax, polypropylene wax, micronized wax, thiab lwm yam.
(2) Fatty acids xws li stearic acid thiab base stearic acid.
(3) Fatty acid amides, esters xws li vinyl bis-stearamide, butyl stearate, oleic acid amide, thiab lwm yam Nws yog tsuas yog siv rau dispersing, uas bis-stearamide yog siv rau tag nrho cov thermoplastics thiab thermosetting plastics, thiab muaj ib tug lubricating nyhuv. .
(4) Hlau soaps xws li stearic acid, zinc stearate, calcium stearate, lauj kaub stearate, magnesium stearate, lead stearate, thiab lwm yam. muaj ob qho tib si thermal stabilization thiab lubricating teebmeem.
(5) Lubricants ua lub luag haujlwm hauv pwm tso tawm, xws li polydimethylsiloxane (methyl silicone roj), polymethylphenylsiloxane (phenylmethyl silicone roj), polydiethylsiloxane (ethyl silicone roj) thiab lwm yam.
Hauv kev txhaj tshuaj molding txheej txheem, thaum siv cov xim qhuav, cov tshuaj kho saum npoo xws li cov roj ntxhia dawb thiab cov roj diffusion feem ntau ntxiv thaum sib tov los ua lub luag haujlwm ntawm adsorption, lubrication, diffusion thiab pwm tso tawm.Thaum dyeing, cov ntaub ntawv raw yuav tsum tau ntxiv rau hauv kev faib ua feem nruab nrab.Ua ntej ntxiv tus neeg saib xyuas qhov chaw thiab kis tusyees, ces ntxiv cov toner thiab kis tusyees.
Thaum xaiv, qhov kub tsis kam ntawm cov dispersant yuav tsum tau txiav txim siab raws li molding kub ntawm cov khoom siv yas.Los ntawm kev xav ntawm tus nqi, nyob rau hauv txoj cai, cov dispersant uas yuav siv tau nyob rau hauv nruab nrab thiab qis kub yuav tsum tsis txhob xaiv rau high kub kuj.Qhov kub dispersant yuav tsum tau tiv taus siab tshaj 250 ℃.
Cov ntaub ntawv:
[1] Zhong Shung.Xim Xim.Beijing: Tuam Tshoj Art Publishing House, 1994.
[2] Song Zhuoyi et al.Yas raw khoom thiab additives.Beijing: Science thiab Technology Literature Publishing House, 2006.
[3] Wu Lieng et al.Masterbatch User Manual.Beijing: Chemical Industry Xovxwm, 2011.
[4] Yu Wenjie et al.Yas Additives thiab Formulation Design Technology.3rd Edition.Beijing: Chemical Industry Xovxwm, 2010.
[5] Wu Lieng.Plastic Coloring Formulation Design.2nd Edition.Beijing: Chemical Industry Xovxwm, 2009
Post lub sij hawm: Jun-25-2022