Piv nrog rau lwm cov khoom yas extruded, SUZHOU SUPXTECH zus tau tej cov uas tsis tshua muaj-ua npuas ncauj daim tawv nqaij PVC cov khoom yas tsis tsuas yog yuav tsum tau zoo plasticization nyob rau hauv tej yam melting siab, tab sis kuj muaj xws li cov kev cai rau qhov luaj li cas, kom muaj nuj nqis thiab uniformity ntawm ua npuas ncauj qhov, nrog rau lub thickness, hardness, brightness thiab tiav ntawm daim tawv nqaij.Qhov zoo ntawm lub cev foaming tsis yog tsuas yog cuam tshuam nrog cov qauv thiab cov ntaub ntawv raw, tab sis kuj cuam tshuam ncaj qha thiab txwv tsis pub ua haujlwm ntawm extruder ntsia hlau, yaj siab, kub, extrusion (traction) ceev, pwm di ncauj qhov sib txawv, pwm pwm kis, txias. dej kub thiab lwm yam.Yog li ntawd, piv nrog rau lwm cov khoom yas extruded, cov tawv nqaij ua npuas ncauj yas khoom muaj ib tug tej yam kev nyuaj, los ntawm kev xyaum thiab txoj kev xav muaj ntau yam unsolved teeb meem tsim nyog rau kev lag luam kws kho mob los kawm thiab daws.
1, daim tawv nqaij ua npuas ncauj PVC yas ntawv ntau lawm tshuab thiab cov yam ntxwv
Cov txheej txheem nyuaj hauv kev tsim cov tawv nqaij foaming PVC cov khoom yas yog foaming.Foaming yog tshwm sim los ntawm kev nce thiab nthuav ntawm yaj viscosity, roj siab tsim los ntawm foaming tus neeg sawv cev thiab atmospheric siab.
Cov txheej txheem foaming feem ntau mus txog peb theem:
(1) Foaming gas yog yaj mus rau hauv cov yas sib tov sib xyaw ua ke ntawm ib qho kub thiab siab nyob rau hauv lub extruder thiab mus txog lub xeev saturation los ua npuas core;
(2) Cov yaj yog extruded los ntawm cov tuag, thiab nrog lub siab tso tawm, lub supersaturated yaj cov roj nucleates, nthuav thiab precipitates, tsim ib tug uniform thiab ntom npuas qhov nyob rau hauv qhov sib txawv ntawm lub formwork;
(3) Nyob rau hauv cov nyhuv txias ntawm lub shaping ntaus ntawv, cov khoom foaming yog solidified thiab zoo li tus.Cov tawv nqaij zoo heev ua npuas ncauj PVC cov khoom siv yas muaj cov yam ntxwv ntawm ntau yam thiab ntom npuas qhov, me me thiab zoo li qub, ntom thiab tuab ua tau raws li qhov yuav tsum tau ua, zoo li du, siab hardness thiab brightness.
2, daim tawv nqaij ua npuas ncauj PVC yas board zoo yam tseem ceeb
Cov ntaub ntawv tseem ceeb uas cuam tshuam ncaj qha rau cov qauv zoo ntawm cov npuas yas yog foaming agent thiab foaming harmonizer.Cov khoom siv raw xws li stabilizer, lubricant, calcium carbonate thiab extrusion txheej txheem tswj tuaj yeem txhawb nqa thiab tswj cov foaming zoo rau qee yam.Vim tias qhov kub ntawm plasticization ntawm yaj nyob rau hauv cov txheej txheem extrusion ntawm cov khoom foaming yuav tsum yog me ntsis qis dua qhov decomposition kub ntawm foaming tus neeg sawv cev, qhov nruab nrab degree ntawm polymerization ntawm PVC resin, qhov kub ntawm cov txheej txheem yuav tsum tau rau yaj plasticization.Txhawm rau kom tau txais cov khoom yas uas muaj foamed, cov viscosity resin yuav tsum tsis txhob siab dhau.Nyob rau tib lub sij hawm, piv nrog rau lwm yam foaming khoom, vim hais tias tus ntoo khaub lig seem ntawm daim ntawv txoj kev yog dav, los ntawm extrusion lub taub hau rau hauv lub qhov ncauj tuag yuav tsum tau muab faib mus rau ib tug dav ntawm txog 1.3 m, thiaj li yuav pab txhawb lub dispersion thiab expansion ntawm npuas. , lub siab ntawm tag nrho cov hla ntu ntawm daim ntawv yuav tsum tau sib koom ua ke, cov kua dej ntawm cov yaj yog siab dua, thiab qhov hnyav molecular ntawm cov resin feem ntau me dua.Xws li SC-7 lossis SC-8 ncua kev kawm txoj kev xoob resin yog qhov tsim nyog.SUZHOU SUPXTECH
Post lub sij hawm: Dec-07-2022