WPC yog cov khoom sib xyaw tsim los ntawm kev siv cov yas kub yaj, suav nrog polyethylene, polypropylene, polyvinyl chloride thiab lawv cov copolymers ua cov nplaum, siv cov hmoov ntoo xws li ntoo, cog qoob loo, cog qoob loo cog hmoov ua cov khoom ntim, extrusion molding lossis nias txoj kev, txhaj tshuaj molding txoj kev.Cov khoom siv hluav taws xob kub yaj tuaj yeem siv cov khoom siv hluav taws xob los yog lub neej pov tseg, cov hmoov ntoo tuaj yeem siv cov khoom pov tseg, cov ntoo me thiab lwm cov ntoo tsis zoo.Los ntawm qhov kev xav ntawm kev tsim cov khoom siv raw, cov khoom siv ntoo yas qeeb thiab tshem tawm cov pa phem ntawm cov pov tseg yas, thiab tseem tshem tawm cov pa phem los ntawm kev ua liaj ua teb incineration rau ib puag ncig.Kev xaiv cov qauv ntawm cov khoom siv hauv cov txheej txheem sib xyaw suav nrog cov hauv qab no:
1. Polymers
Cov yas siv hauv kev ua cov ntoo-yas sib xyaw tuaj yeem yog cov thermoset plastics thiab cov thermoplastics, thermoset plastics xws li epoxy resins, thermoplastics xws li polyethylene (PE), polypropylene (PP) thiab polyoxyethylene (PVC).Vim tias qhov tsis zoo thermal stability ntawm ntoo fiber ntau, tsuas yog cov thermoplastics nrog kev ua haujlwm kub hauv qab 200 ° C tau dav siv, tshwj xeeb tshaj yog polyethylene.Kev xaiv cov yas polymers feem ntau yog raws li cov yam ntxwv ntawm cov khoom siv polymer, cov khoom xav tau, cov khoom siv raw, tus nqi thiab qib ntawm kev paub txog nws.Xws li: polypropylene tsuas yog siv hauv cov khoom siv tsheb thiab cov khoom siv hauv lub neej txhua hnub, PVC feem ntau yog siv rau hauv lub tsev qhov rooj thiab qhov rais, paving panels thiab lwm yam.Tsis tas li ntawd, lub yaj ntws tus nqi (MFI) ntawm cov yas kuj muaj qee yam cuam tshuam rau cov khoom ntawm cov khoom sib xyaw, nyob rau hauv tib txoj kev ua haujlwm, MFI ntawm cov resin yog siab dua, tag nrho infiltration ntawm cov hmoov ntoo zoo dua, Kev faib tawm ntawm cov hmoov ntoo yog ntau yam sib xws, thiab kev nkag mus thiab kev faib tawm ntawm cov hmoov ntoo cuam tshuam rau cov khoom ntawm cov khoom sib xyaw, tshwj xeeb tshaj yog qhov cuam tshuam lub zog.
2. Cov tshuaj ntxiv
Txij li cov hmoov ntoo muaj zog nqus dej thiab muaj zog polarity, thiab feem ntau cov thermoplastics tsis yog-polar thiab hydrophobic, kev sib raug zoo ntawm ob yog qhov tsis zoo, thiab kev sib txuas sib txuas yog me me, thiab cov khoom siv tsim nyog feem ntau yog siv los hloov kho qhov chaw ntawm polymer. thiab cov hmoov ntoo los txhim kho qhov sib cuam tshuam ntawm cov hmoov ntoo thiab cob.Ntxiv mus, cov nyhuv dispersion ntawm high-filling ntoo hmoov nyob rau hauv molten thermoplastics yog tsis zoo, feem ntau nyob rau hauv ib daim ntawv ntawm aggregation, ua rau lub yaj ntws tsis zoo, extrusion ua nyuaj, thiab cov tshuaj kho deg yuav tsum tau ntxiv los txhim kho cov ntws los pab. extrusion pwm.Nyob rau tib lub sijhawm, cov yas matrix kuj yuav tsum tau ntxiv ntau yam additives los txhim kho nws cov kev ua tau zoo thiab kev siv cov khoom tiav, txhim kho kev sib khi quab yuam ntawm cov hmoov ntoo thiab cov polymer thiab cov khoom siv ntawm cov khoom sib xyaw.Feem ntau siv additives muaj xws li cov pawg hauv qab no:
a) Coupling tus neeg sawv cev tuaj yeem tsim muaj kev sib txuas sib txuas ntawm cov yas thiab ntoo hmoov;Nyob rau tib lub sijhawm, nws tuaj yeem txo qhov nqus dej ntawm cov hmoov ntoo thiab txhim kho kev sib raug zoo thiab kev tawg ntawm cov hmoov ntoo thiab yas, yog li cov khoom siv ntawm cov khoom sib xyaw tau zoo tuaj.Feem ntau siv coupling agents yog: isocyanate, isopropylbenzene peroxide, aluminate, phthalates, silane coupling tus neeg saib xyuas, txiv neej anhydride hloov polypropylene (MAN-g-PP), ethylene-acrylate (EAA).Feem ntau, qhov sib ntxiv ntawm tus neeg sawv cev sib txuas yog 1wt% ~ 8wt% ntawm cov hmoov ntoo ntxiv, xws li silane coupling tus neeg sawv cev tuaj yeem txhim kho cov adhesion ntawm cov yas thiab cov hmoov ntoo, txhim kho qhov tawg ntawm cov hmoov ntoo, txo cov dej nqus, thiab alkaline. kev kho cov hmoov ntoo tsuas tuaj yeem txhim kho qhov tawg ntawm cov hmoov ntoo, tsis tuaj yeem txhim kho cov dej nqus ntawm cov hmoov ntoo thiab nws cov adhesion nrog yas.Nws yuav tsum tau muab sau tseg tias cov txiv neej coupling tus neeg sawv cev thiab lub stearate lubricant yuav muaj ib tug repulsive cov tshuaj tiv thaiv, uas yuav ua rau ib tug txo nyob rau hauv cov khoom zoo thiab tawm los thaum siv ua ke.
b) Plasticizer Rau qee cov resins nrog cov iav siab hloov pauv kub thiab yaj ntws viscosity, xws li hardness PVC, nws yog ib qho nyuaj rau txheej txheem thaum nws ua ke nrog ntoo hmoov, thiab feem ntau yuav tsum tau ntxiv plasticizer los txhim kho nws cov kev ua tau zoo.Plasticizer molecular qauv muaj cov noob polar thiab tsis-polar, nyob rau hauv qhov kev txiav txim ntawm qhov kub thiab txias shear, nws tuaj yeem nkag mus rau cov saw hlau polymer molecular, los ntawm cov noob caj noob ces sib nyiam los ua ib qho kev sib txuam thiab ruaj khov, thiab nws qhov ntev uas tsis yog-polar molecule insertion. tsis muaj zog ntawm kev sib nrig sib attraction ntawm polymer molecules, thiaj li hais tias kev ua tau yooj yim.Dibutyl phthalate (DOS) thiab lwm yam plasticizers feem ntau ntxiv rau cov ntoo-yas composites.Piv txwv li, hauv PVC ntoo hmoov cov khoom sib xyaw, qhov sib ntxiv ntawm cov yas yas DOP tuaj yeem txo qhov kub thiab txias, txo qhov decomposition thiab pa taws ntawm cov hmoov ntoo, thiab txhim kho lub zog tensile ntawm cov khoom sib xyaw thaum lub elongation ntawm kev tawg nce nrog kev nce ntawm cov ntsiab lus DOP.
c) Lubricants Ntoo-yas composites feem ntau yuav tsum tau ntxiv lubricants los txhim kho lub fluidity ntawm cov yaj thiab cov nto zoo ntawm cov khoom extruded, thiab cov lubricants siv tau muab faib ua lubricants sab hauv thiab sab nraud lubricants.Kev xaiv ntawm cov roj nplaum sab hauv yog cuam tshuam nrog cov matrix resin siv, uas yuav tsum muaj kev sib raug zoo nrog cov resin ntawm qhov kub thiab txias, thiab tsim cov nyhuv plasticizing, txo cov cohesion zog ntawm cov molecules hauv resin, tsis muaj zog ntawm kev sib txhuam ntawm cov molecules, hauv kom txo cov yaj viscosity ntawm cov resin thiab txhim kho cov yaj fluidity.Lub lubricant sab nraud yeej ua lub luag haujlwm ntawm kev sib txuas ntawm lubrication ntawm cov resin thiab ntoo hmoov hauv kev ua cov yas molding, thiab nws lub luag haujlwm tseem ceeb yog los txhawb cov zawv zawg ntawm cov khoom siv.Feem ntau, lubricant feem ntau muaj ob qho tib si sab hauv thiab sab nraud lubrication zog.Lubricants muaj qee yam cuam tshuam rau lub neej kev pab cuam ntawm pwm, chim thiab ntsia hlau, lub peev xwm ntau lawm ntawm extruder, lub zog siv nyob rau hauv cov txheej txheem ntau lawm, nto tiav ntawm cov khoom thiab qhov kub tsis tshua muaj kev cuam tshuam ntawm qhov profile.Feem ntau siv cov roj nplua nyeem yog: zinc stearate, ethylene bisfatty acid amide, polyester wax, stearic acid, lead stearate, polyethylene wax, paraffin wax, oxidized polyethylene wax thiab lwm yam.
d) Colorant Nyob rau hauv kev siv cov ntoo-yas composite cov ntaub ntawv, cov solvable tshuaj nyob rau hauv ntoo hmoov yog ib qho yooj yim mus tsiv mus nyob rau saum npoo ntawm cov khoom, thiaj li hais tias cov khoom decolorization, thiab nws thiaj li ua grey, txawv cov khoom nyob rau hauv ib tug tej yam kev siv ib puag ncig, tab sis kuj tsim cov pob dub los yog xeb.Yog li ntawd, colorants kuj tau lug siv nyob rau hauv zus tau tej cov ntoo-yas composite cov ntaub ntawv.Nws tuaj yeem ua rau cov khoom muaj xim tsis sib xws thiab ruaj khov, thiab decolorization qeeb.
e) Foaming agent wood-yas composite material muaj ntau qhov zoo, tab sis vim yog cov khoom sib xyaw thiab cov hmoov ntoo, nws cov ductility thiab kev cuam tshuam tsis zoo raug txo, cov khoom yog nkig, thiab qhov ceev yog ze li ntawm 2 npaug ntau dua li cov ntoo tsoos. cov khoom, txwv nws txoj kev siv dav.Vim muaj cov qauv npuas zoo, cov foamed ntoo-yas composite tuaj yeem ua rau lub ntsej muag tawg thiab tiv thaiv kev nthuav dav ntawm cov kab nrib pleb, yog li txhim kho qhov cuam tshuam thiab ductility ntawm cov khoom, thiab txo qhov ntom ntawm cov khoom.Muaj ntau hom tshuab tshuab, thiab feem ntau yog ob feem ntau siv: endothermic blowing agents (xws li sodium bicarbonate NaHCO3) thiab exothermic blowing agents (azodibonamide AC), uas nws thermal decomposition cwj pwm txawv, thiab muaj kev sib txawv ntawm viscoelasticity thiab foaming daim ntawv ntawm polymer yaj, yog li tus neeg sawv cev tsim nyog tshuab yuav tsum raug xaiv raws li cov kev cai ntawm kev siv cov khoom.
f) Daim ntawv thov ntawm UV stabilizers thiab lwm yam UV stabilizers kuj tau tsim sai heev nrog kev txhim kho ntawm tib neeg cov kev xav tau rau qhov zoo thiab ua haujlwm ntev ntawm cov ntoo-yas composites.Nws tuaj yeem ua rau cov polymer hauv cov khoom sib xyaw tsis degrade lossis txhua yam khoom poob.Feem ntau siv yog thaiv amine lub teeb stabilizers thiab ultraviolet absorbers.Tsis tas li ntawd, txhawm rau ua kom cov khoom sib xyaw tuaj yeem tswj tau qhov zoo thiab ua haujlwm zoo, feem ntau yuav tsum tau ntxiv cov tshuaj tua kab mob, thiab kev xaiv cov tshuaj tua kab mob yuav tsum xav txog hom ntoo hmoov, qhov sib ntxiv, cov kab mob hauv lub cev. cov khoom siv sib xyaw siv ib puag ncig, cov ntsiab lus dej ntawm cov khoom thiab lwm yam.Zinc borate, piv txwv li, yog preservative tab sis tsis algal.
Kev tsim thiab siv cov khoom siv ntoo-yas sib xyaw yuav tsis tso tawm cov teeb meem tsis zoo rau tib neeg kev noj qab haus huv rau ib puag ncig, thiab cov khoom siv ntoo-yas lawv tus kheej tuaj yeem rov siv dua thiab rov siv dua, yog li cov khoom ntoo-yas yog hom tshiab ntawm kev tiv thaiv ib puag ncig ntsuab. cov khoom, uas tuaj yeem ua rau tus kheej tu ecological thiab muaj kev nthuav dav dav
Post lub sij hawm: Jun-24-2023