Xim masterbatch, ib txoj kev siv ntau xim hauv kev lag luam cov ntaub ntawv polymer, ua haujlwm ntawm lub hauv paus ntsiab lus ntawm kev sib xyaw ua ke siab -cov xim xim nrog cov cab kuj thiab cov khoom siv ntxiv los ntawm cov txheej txheem tshwj xeeb rau hauv cov khoom nruab nrab. Hauv kev ua tiav tom qab, cov khoom tawg yooj yim thiab cov xim ruaj khov yog ua tiav los ntawm kev sib xyaw yaj. Lub hauv paus ntsiab lus no sib npaug ntsuas qhov tseeb, kev ua haujlwm yooj yim, thiab kev nyab xeeb ib puag ncig, muab cov xim masterbatch tseem ceeb hauv cov xim ntawm cov yas niaj hnub, roj hmab, thiab lwm yam ntaub ntawv.
Raws li txoj cai, xim masterbatch muaj peb ntu: cov xim, cov khoom thauj khoom, thiab cov khoom siv ntxiv. Cov xim tuaj yeem yog cov xim organic, cov xim tsis muaj xim, lossis xim xim, lub luag haujlwm muab cov xim xav tau thiab zais lub zog. Cov cab kuj feem ntau yog cov polymer uas muaj cov khoom yaj zoo ib yam li cov khoom siv matrix, xws li polyethylene, polypropylene, thiab polystyrene. Nws lub luag haujlwm yog ua kom miscible nrog cov matrix resin ntawm kev ua haujlwm kub, ua raws li kev thauj thiab dispersion nruab nrab rau cov xim. Cov khoom siv ntxiv muaj xws li dispersants, heat stabilizers, thiab antioxidants, siv los txhim kho kev ua haujlwm fluidity, tiv thaiv siab - kub degradation, thiab txhim kho xim ceev thiab huab cua tsis kam.
Lub hauv paus ntsiab lus ua haujlwm ntawm xim masterbatch tuaj yeem muab faib ua ob theem: kev npaj thiab kev thov. Nyob rau hauv lub sij hawm npaj, cov xim yog uniformly coated rau hauv cov cab kuj resin los ntawm siab - shear mixing, thiab ces granulated rau daim ntawv ntawm ib tug taag loj. Cov txheej txheem no refines thiab xauv cov xim, uas yuav yooj yim agglomerate los yog disperse unevenly, nyob rau hauv lub carrier matrix los ntawm mechanical quab yuam thiab additives, kom ntseeg tau sai deagglomeration thiab uniform tis thaum siv tom ntej.
Nyob rau hauv daim ntawv thov theem, cov xim masterbatch thiab cov matrix resin nkag mus rau hauv lub melting cheeb tsam ntawm extrusion, txhaj molding, tshuab moulding, los yog lwm yam khoom siv. Vim hais tias lub melting kub thiab viscosity ntawm cov cab kuj thiab matrix yog matched, cov xim masterbatch melts sai sai nyob rau hauv tshav kub thiab shear, tso cov xim sab hauv thiab uniformly dispersing nws nyob rau hauv lub yaj los ua ib tug zoo sib xws xim. Cov txheej txheem no zam cov plua plav paug, ntsuas qhov yuam kev, thiab cov teeb meem tsis sib haum xeeb cuam tshuam nrog ncaj qha siv cov hmoov av lossis kua xim xim, thaum tseem txo qis cov organic compound emissions thiab txhim kho kev huv thiab kev nyab xeeb.
Lub hauv paus ntsiab lus tom qab xim masterbatches yog qhov tseem ceeb "carrier-mediated dispersion-release" mechanism. Nws siv cov thermodynamic compatibility ntawm cov ntaub ntawv thiab cov kinetics ntawm kev ua kom ua tau zoo tsiv teb tsaws thiab sib faib faib ntawm siab -concentration coloring units nyob rau hauv lub matrix. Kev tswj xyuas meej ntawm kev ua tsis tau, xws li qhov kub thiab txias profiles, ntsia hlau ceev, thiab rov qab siab, yog qhov tseem ceeb rau kev ua haujlwm zoo ntawm txoj cai no.
Nyob rau hauv cov ntsiab lus, xim masterbatches, los ntawm kev tshawb fawb cov ntsiab lus ntawm kev sib xyaw thiab yaj dispersion, hloov cov txheej txheem xim nyuaj rau hauv kev ntsuas, rov ua dua, thiab ua haujlwm zoo ib puag ncig, muab kev ruaj khov, ua tau zoo, thiab yooj yim scalable tov rau xim cov ntaub ntawv polymer.