Xov xwm

"Metallocene" yog hais txog cov organic hlau sib txuas ua ke tsim los ntawm cov hlau hloov pauv (xws li zirconium, titanium, hafnium, thiab lwm yam) thiab cyclopentadiene. Polypropylene synthesized nrog metallocene catalysts hu ua metallocene polypropylene (mPP).

Metallocene polypropylene (mPP) cov khoom muaj kev khiav dej num siab dua, kub siab dua, kev thaiv ntau dua, tshwj xeeb Clarity thiab Transparency, qis tsw, thiab muaj peev xwm siv hauv Fibers, Cast Film, Txhaj Molding, Thermoforming, Kev Kho Mob, thiab lwm yam. Kev tsim cov metallocene polypropylene (mPP) muaj ob peb kauj ruam tseem ceeb, suav nrog kev npaj catalyst, polymerization, thiab tom qab ua tiav.

1. Kev npaj Catalyst:

Kev xaiv ntawm Metallocene Catalyst: Kev xaiv ntawm metallocene catalyst yog qhov tseem ceeb hauv kev txiav txim siab cov khoom ntawm cov txiaj ntsig mPP. Cov catalysts feem ntau koom nrog cov hlau hloov pauv, xws li zirconium lossis titanium, sib xyaw ntawm cyclopentadienyl ligands.

Cocatalyst Ntxiv: Metallocene catalysts feem ntau yog siv ua ke nrog cov cocatalyst, feem ntau yog cov khoom siv txhuas. Lub cocatalyst activates lub metallocene catalyst, cia nws pib cov tshuaj tiv thaiv polymerization.

2. Polymerization:

Kev npaj Feedstock: propylene, monomer rau polypropylene, feem ntau yog siv los ua thawj cov khoom noj. Cov propylene yog purified kom tshem tawm impurities uas yuav cuam tshuam rau cov txheej txheem polymerization.

Reactor Teeb: Cov tshuaj tiv thaiv polymerization tshwm sim hauv lub reactor raws li kev tswj xyuas kom zoo. Lub reactor teeb muaj xws li cov metallocene catalyst, cocatalyst, thiab lwm yam additives uas yuav tsum tau rau cov khoom polymer uas xav tau.

Polymerization Conditions: Cov kev mob tshwm sim, xws li kub, siab, thiab lub sijhawm nyob, tau ua tib zoo tswj xyuas kom ntseeg tau tias qhov hnyav molecular thiab cov qauv polymer. Metallocene catalysts pab kom tswj tau meej dua ntawm cov kev txwv no piv rau cov tshuaj catalysts.

3. Copolymerization (Yeem):

Kev koom ua ke ntawm Co-monomers: Hauv qee kis, mPP yuav raug copolymerized nrog lwm cov monomers los hloov nws cov khoom. Cov co-monomers feem ntau suav nrog ethylene lossis lwm yam alpha-olefins. Kev koom ua ke ntawm co-monomers tso cai rau kev hloov kho ntawm cov polymer rau cov ntawv thov tshwj xeeb.

4. Termination thiab quenching:

Reaction Termination: Thaum lub polymerization tiav, cov tshuaj tiv thaiv raug txiav. Qhov no feem ntau ua tiav los ntawm kev qhia txog tus neeg sawv cev txiav tawm uas cuam tshuam nrog cov khoom siv hluav taws xob polymer kawg, txwv tsis pub kev loj hlob ntxiv.

quenching: Lub polymer yog sai sai txias los yog quenched los tiv thaiv ntxiv cov tshuaj tiv thaiv thiab kom solidify lub polymer.

5. Polymer rov qab thiab tom qab ua tiav:

Polymer Separation: Lub polymer yog cais los ntawm cov tshuaj tiv thaiv sib tov. Unreacted monomers, catalyst residues, thiab lwm yam by-products raug tshem tawm los ntawm ntau yam kev sib cais.

Cov kauj ruam tom qab ua tiav: Lub mPP yuav dhau mus ua cov kauj ruam ntxiv, xws li extrusion, compounding, thiab pelletization, kom ua tiav daim ntawv xav tau thiab cov khoom. Cov kauj ruam no tseem tso cai rau kev koom ua ke ntawm cov khoom siv ntxiv xws li cov neeg ua haujlwm plam, cov tshuaj tiv thaiv kab mob antioxidant, stabilizers, nucleating agents, colorants, thiab lwm yam additives.

Optimizing mPP: Ib qhov tob tob rau hauv lub luag haujlwm tseem ceeb ntawm kev ua cov khoom siv ntxiv

Slip Agents: Cov neeg ua haujlwm plam, xws li cov saw ntev ntev fatty amides, feem ntau ntxiv rau mPP kom txo tau kev sib txhuam ntawm cov saw hlau polymer, tiv thaiv kev sib tsoo thaum ua haujlwm. Qhov no pab txhim kho cov txheej txheem extrusion thiab molding.

Flow Enhancers:Flow enhancers los yog kev pab cuam, xws li polyethylene waxes, yog siv los txhim kho cov yaj ntws ntawm mPP. Cov additives no txo ​​viscosity thiab txhim khu lub polymer lub peev xwm los sau pwm kab noj hniav, ua rau cov txheej txheem zoo dua.

Antioxidants:

Stabilizers: Antioxidants yog ib qho tseem ceeb additives uas tiv thaiv mPP los ntawm degradation thaum ua. Hindered phenols thiab phosphites feem ntau yog siv cov stabilizers uas inhibit tsim cov dawb radicals, tiv thaiv thermal thiab oxidative degradation.

Nucleating Agents:

Nucleating agents, xws li talc los yog lwm yam inorganic tebchaw, yog ntxiv los txhawb kev tsim cov qauv crystalline ntau dua hauv mPP. Cov additives no txhim kho cov khoom siv hluav taws xob polymer, suav nrog kev nruj thiab kev cuam tshuam.

Colorants:

Pigments thiab Dyes: Cov xim feem ntau muab tso rau hauv mPP kom ua tiav cov xim tshwj xeeb hauv cov khoom kawg. Pigments thiab dyes raug xaiv raws li qhov xav tau xim thiab daim ntawv thov.

Impact Modifiers:

Elastomers: Hauv cov ntawv thov uas cuam tshuam tsis zoo yog qhov tseem ceeb, cov khoom hloov pauv xws li ethylene-propylene roj hmab yuav raug ntxiv rau mPP. Cov kev hloov kho no txhim kho lub zog ntawm cov polymer yam tsis muaj kev txi lwm yam khoom.

Compatibilizers:

Maleic Anhydride Grafts: Compatibilizers yuav raug siv los txhim kho kev sib raug zoo ntawm mPP thiab lwm yam polymers lossis additives. Maleic anhydride grafts, piv txwv li, tuaj yeem txhim kho qhov adhesion ntawm cov khoom sib txawv polymer.

Slip thiab Antiblock Agents:

Slip Agents: Ntxiv nrog rau kev txo qis kev sib txhuam, cov neeg ua haujlwm plam kuj tuaj yeem ua cov tshuaj tiv thaiv thaiv. Antiblock cov neeg ua haujlwm tiv thaiv kev sib txuas ua ke ntawm cov yeeb yaj kiab lossis cov ntaub ntawv thaum lub sijhawm khaws cia.

(Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias cov khoom siv tshwj xeeb uas siv hauv mPP formulation tuaj yeem sib txawv raws li daim ntawv thov, kev ua haujlwm, thiab cov khoom siv uas xav tau. kev tsim khoom ntawm mPP muab kev tswj hwm qib ntxiv thiab qhov tseeb, tso cai rau kev sib koom ua ke ntawm cov khoom siv ntxiv rau hauv txoj hauv kev uas tuaj yeem raug kho kom zoo kom tau raws li cov kev xav tau tshwj xeeb.)

Xauv Efficiency丨Kev daws teeb meem tshiab rau mPP: Lub luag haujlwm ntawm Novel Processing Additives, Dab tsi mPP manufacturers yuav tsum paub!

mPP tau tshwm sim los ua ib qho kev hloov pauv polymer, muab cov khoom zoo dua qub thiab txhim kho kev ua haujlwm hauv ntau yam kev siv. Txawm li cas los xij, qhov zais cia tom qab nws txoj kev vam meej tsis yog nyob rau hauv nws cov yam ntxwv tseem ceeb tab sis kuj tseem siv cov tswv yim ntawm kev ua tiav cov khoom siv ntxiv.

TIAB SA 5091qhia txog txoj hauv kev tshiab los txhawb kev ua tiav ntawm metallocene polypropylene, muab lwm txoj hauv kev rau PPA cov tshuaj ntxiv, thiab cov kev daws teeb meem los tshem tawm cov tshuaj fluorine-raws li PFAS kev txwv.

TIAB SA 5091yog Fluorine-Free Polymer Processing Additive rau extrusion ntawm polypropylene khoom nrog PP raws li cov cab kuj launched los ntawm SILIKE. Nws yog cov organic hloov pauv polysiloxane masterbatch khoom, uas tuaj yeem txav mus rau cov khoom siv ua haujlwm thiab muaj kev cuam tshuam thaum lub sijhawm ua haujlwm los ntawm kev ua kom zoo dua qub lubrication zoo ntawm polysiloxane thiab cov nyhuv polarity ntawm cov pab pawg hloov. Ib qho me me ntawm cov tshuaj tuaj yeem txhim kho qhov fluidity thiab kev ua tau zoo, txo qhov tuag drool thaum lub sij hawm extrusion, thiab txhim kho qhov tshwm sim ntawm shark tawv nqaij, dav siv los txhim kho lub lubrication thiab nto yam ntxwv ntawm yas extrusion.

Thaum twgPFAS-Dawb Polymer Processing Aid (PPA) SILIMER 5091yog koom ua ke rau hauv metallocene polypropylene (mPP) matrix, nws txhim kho cov yaj ntws ntawm mPP, txo kev sib txhuam ntawm cov saw hlau polymer, thiab tiv thaiv kev ua kom zoo thaum ua haujlwm. Qhov no pab txhim kho cov txheej txheem extrusion thiab molding. pab txhawb smoother ntau lawm txheej txheem thiab pab txhawb rau tag nrho cov efficiency.

Pov tseg koj cov txheej txheem qub qub,SILIKE Fluorine-dawb PPA SILIMER 5091yog yam koj xav tau!