Yuav Ua Li Cas Thiaj Ua Tau Polyphenylene Sulfide (PPS) Yas Thiab Nws Siv Hauv Kev Siv Hauv Kev Lag Luam
Polyphenylene sulfide (PPS) yog ib hom yas engineering uas muaj kev ua tau zoo heev uas paub txog nws txoj kev tiv taus cua sov, kev ruaj khov zoo heev, thiab kev tiv taus tshuaj lom neeg zoo heev. Hauv ntau lub lag luam, PPS raug xaiv thaum cov yas ib txwm xws li PP, PE, lossis txawm tias nylon tsis muaj peev xwm ua tau raws li qhov xav tau ntawm qhov kub siab, kev raug tshuaj lom neeg hnyav, lossis qhov xav tau kev ua kom raug ntawm cov khoom. Tsab xov xwm no muab ib qho kev piav qhia txog yuav ua li cas PPS yas raug tsim tawm hauv kev lag luam (tsis tas yuav mus rau hauv cov ntsiab lus ua haujlwm uas muaj kev phom sij rau kev ua haujlwm sab nraum lub chaw tsim khoom) thiab nws ntau yam kev siv hauv kev siv hauv kev lag luam.
1. Polyphenylene Sulfide (PPS) yog dab tsi?
PPS yog ib qho semi-crystalline aromatic polymer uas muaj cov phenyl (phenylene) rings txuas nrog sulfur (sulfide) atoms. Cov qauv no muab PPS nws cov yam ntxwv tseem ceeb:
- Kev tiv taus cua sov: muaj peev xwm ua haujlwm ntawm qhov kub siab hauv lub sijhawm ntev.
- Tshuaj tiv thaiv: ruaj khov tiv thaiv ntau cov kuab tshuaj, cov kua qaub thiab cov hauv paus.
- Tiv thaiv hluav taws ntuj tsim: feem ntau muaj cov yam ntxwv tiv thaiv hluav taws.
- Ruaj khov qhov loj me: kev hloov me me ntawm qhov loj me thaum raug cua sov thiab cov khoom siv kho tshuab.
- Haum rau kev txhawb nqa fiber ntau: feem ntau ua los ntawm kev sib xyaw nrog iav fiber lossis carbon fiber kom ua rau muaj zog ntxiv.
Vim yog cov khoom no, PPS siv dav hauv cov khoom uas xav tau kev ua tau zoo - tshwj xeeb tshaj yog hauv tsheb, khoom siv hluav taws xob, roj & roj av, thiab cov khoom siv tshuaj lom neeg.
2. Kev Txheeb Xyuas Txog Yuav Ua Li Cas Thiaj Ua Tau PPS Yas (Txheej Txheem Kev Lag Luam)
PPS yog ua los ntawm cov txheej txheem polymerization uas muaj cov aromatic monomers thiab cov sulfur qhov chaw, ua raws li kev ntxuav, ziab, thiab tsim rau hauv cov resin pellets npaj rau kev ua tiav ntxiv (piv txwv li, txhaj tshuaj molding). Cov hauv qab no yog cov ntsiab lus ntawm cov theem.
A. Kev Xaiv Cov Khoom Siv Raw thiab Cov Ntsiab Cai ntawm Kev Ua Tshuaj
Hauv kev lag luam, PPS feem ntau yog tsim los ntawm kev sib xyaw ua ke uas tsim cov saw hlau polymer aromatic nrog cov sulfide bonds. Ib txoj kev paub dav dav yog polymerization uas muaj:
– Cov tshuaj Halogenated aromatic (piv txwv li qee cov dichlorobenzenes), thiab
- Cov chaw tsis muaj zog sulfide (piv txwv li sodium sulfide).
Cov tshuaj tiv thaiv yog ua tiav hauv cov kuab tshuaj aprotic polar tshwj xeeb thiab nyob rau hauv qhov kub thiab txias tswj tau. Lub hom phiaj tseem ceeb yog tsim cov saw hlau PPS nrog qhov hnyav molecular tsim nyog kom ua tau raws li cov lus qhia rau cov khoom siv kho tshuab thiab kev ua haujlwm tau zoo.
Lus Cim Tseem Ceeb: Txawm hais tias nws zoo li "kev tshuaj lom neeg yooj yim," cov txheej txheem PPS yog cov txheej txheem tshuaj lom neeg muaj kev pheej hmoo siab, suav nrog cov khoom siv corrosive / lom thiab cov xwm txheej tshuaj tiv thaiv uas tsis muaj kev nyab xeeb rau kev siv tsis yog hauv kev lag luam. Yog li ntawd, cov lus piav qhia no tau nthuav tawm ntawm lub tswv yim thiab cov txheej txheem ntawm cov nroj tsuag, tsis yog ua ib qho kev qhia ua tau zoo.
B. Theem Polymerization (Theem Reactor)
1. Reactor filling thiab inertization
Cov reactors kev lag luam feem ntau muaj cov txheej txheem sib xyaw, cua sov, txias, thiab tswj siab. Inertization (piv txwv li, nrog nitrogen) yog ua los txo qhov kev pheej hmoo ntawm cov tshuaj tiv thaiv tsis xav tau.
2. PPS cov tshuaj tiv thaiv saw hlau
Cov khoom siv raw raug ntxiv raws li cov piv txwv tshwj xeeb. Hauv qab cov txheej txheem, kev ua tshuaj tiv thaiv tshwm sim thiab cov saw polymer pib tsim. Cov kev ntsuas xws li kub, lub sijhawm ua tshuaj tiv thaiv, thiab kev sib xyaw ua ke yog qhov tseem ceeb:
– Qhov hnyav ntawm PPS,
- Kev faib tawm ntawm qhov hnyav molecular, thiab
- Qib ntawm kev ceg/qauv uas cuam tshuam rau cov khoom kawg.
3. Tswj viscosity thiab degree ntawm polymerization
PPS uas muaj qhov hnyav molecular qis dhau feem ntau yuav tawg yooj yim, thaum qhov hnyav molecular siab dhau tuaj yeem ua rau cov txheej txheem yaj nyuaj. Yog li ntawd, cov chaw tsim khoom feem ntau tswj qhov kawg ntawm cov tshuaj tiv thaiv kom ntseeg tau tias muaj cov khoom siv resin sib xws ntawm cov pawg.
C. Kev Sib Cais, Kev Ntxuav, thiab Kev Ua Kom Tsis Muaj Teeb Meem
Tom qab ua tiav qhov kev sib xyaw, cov khoom sib xyaw muaj PPS, cov ntsev inorganic by-product, thiab cov kuab tshuaj/reactant seem. Cov kauj ruam tom ntej feem ntau suav nrog:
- Kev lim/sib cais cov khoom khov kom rho tawm PPS los ntawm cov kua theem.
- Ntxuav ntau zaus kom txo cov ntsev thiab cov kuab paug.
- Kev ua kom tsis muaj zog yog tias muaj cov khoom uas yuav tsum tau txo qhov kev ua haujlwm ntawm cov tshuaj.
- Kev rov qab tau cov kuab tshuaj los ntawm kev distillation / rov ua dua tshiab rau tus nqi thiab kev ua haujlwm zoo rau ib puag ncig.
Theem kev ntxuav kom huv yog qhov tseem ceeb heev vim tias cov pa phem tuaj yeem txo qhov kev ruaj khov ntawm thermal, ua rau muaj kev xeb hauv cov tshuab, lossis ua rau cov khoom siv hluav taws xob puas tsuaj.
D. Kev ziab thiab kev tsim cov roj hmab (Pelletizing)
Cov PPS uas tau ntxuav lawm ces:
1. Ziab kom txo cov kuab tshuaj/dej uas tseem tshuav.
2. Yog tias tsim nyog, sib tov cov khoom ntxiv kom kho cov yam ntxwv:
- Iav fiber (GF) los ua kom muaj zog thiab tawv,
– PTFE los yog cov roj nplua nyeem khov kho kom txo tau kev sib txhuam,
- Thermal stabilizer, pigment, los yog mineral filler.
3. Muab cov khoom sib xyaw ua ke thiab pelletized rau hauv cov qauv cob qhia hauv kev lag luam.
Cov pellets no ces muab rau cov chaw tsim khoom kom ua tiav cov khoom kawg los ntawm kev txhaj tshuaj molding, extrusion, lossis compression molding.
3. Cov Txheej Txheem Tsim Khoom PPS (Tom Qab Ua tiav Resin)
Thaum PPS muaj nyob rau hauv cov pellets, cov chaw tsim khoom feem ntau siv cov hauv qab no:
- Kev txhaj tshuaj molding: feem ntau yog rau cov khoom precision (tsev nyob, connectors, valve Cheebtsam).
- Kev rho tawm: rau qee cov duab profile, cov yeeb yaj kiab / daim ntawv tshwj xeeb, lossis cov khoom txuas ntxiv mus.
- Kev txhaj tshuaj molding: tshwj xeeb tshaj yog rau cov khoom uas muaj qee yam kev txhawb zog lossis cov duab tshwj xeeb.
– Kev siv tshuab: PPS kuj tseem tuaj yeem siv tshuab tom qab molding (txawm hais tias qhov no feem ntau tshwm sim rau lwm cov yas), tshwj xeeb tshaj yog nyob rau hauv qee qib lossis cov khoom sib xyaw.
PPS muaj qhov kub ua haujlwm siab dua piv rau cov yas ib txwm muaj, yog li cov tshuab thiab pwm yuav tsum tau tsim los kom tiv taus cov xwm txheej no thiab tswj hwm kev siv crystallization tas li.
4. Kev siv PPS hauv kev siv hauv kev lag luam
Qhov zoo ntawm PPS ua rau nws sawv tawm hauv cov haujlwm hauv qab no.
A. Kev Lag Luam Tsheb
Tsheb niaj hnub xav tau cov khoom siv uas tsis hnyav tab sis tiv taus cua sov thiab tshuaj lom neeg:
– Cov khoom siv roj: cov khoom uas kov cov roj thiab nws cov khoom ntxiv.
- Cov khoom hauv qab lub hood (chav cav): vim tias lawv tiv taus cua sov thiab ruaj khov.
- Lub tsev sensor thiab lub connector: PPS ruaj khov, tseem ceeb rau kev kaw thiab kev ua kom raug.
PPS kuj tseem pab txo qhov hnyav ntawm lub tsheb, txhawb kev siv hluav taws xob kom zoo, thiab tseem tuaj yeem tiv taus qhov kub thiab txias heev.
B. Khoom Siv Hluav Taws Xob thiab Hluav Taws Xob
PPS nrov rau:
- Cov khoom siv hluav taws xob thiab cov khoom rwb thaiv tsev vim lawv cov khoom siv soldering ruaj khov thiab tiv taus cua sov.
- Cov khoom siv hloov pauv, relay thiab bobbin hauv qhov chaw kub.
- Cov ntawv thov uas xav tau kev tiv thaiv hluav taws tsis muaj ntau yam khoom ntxiv.
Kev ruaj khov ntawm PPS kuj tseem ceeb heev rau kev tswj "kev sib dhos ntawm tus pin" ntawm cov khoom sib txuas precision.
C. Kev Lag Luam Tshuaj thiab Kev Ua Khoom
PPS siv dav rau:
- Cov khoom siv twj tso kua mis thiab lub valve (impeller, qee lub casings, rooj zaum) vim tias lawv tiv taus cov tshuaj lom neeg xeb.
- Cov khoom siv ua haujlwm uas raug rau cov kuab tshuaj thiab cov tshuaj lom neeg hnyav.
- Cov lim hnab / cov lim xov xwm (hauv qee qhov kev siv) thaum xav tau kev tiv taus tshuaj lom neeg thiab kub.
Piv rau qee cov yas lwm yam, PPS tuaj yeem muab kev sib xyaw ua ke ntawm kev tiv thaiv tshuaj lom neeg thiab lub peev xwm ua haujlwm ntawm qhov kub siab dua.
D. Roj & Roj Av thiab Zog
Cov chaw muaj roj thiab roj av feem ntau muaj cov kua dej corrosive, kub siab, thiab cov khoom siv kho tshuab:
– Cov khoom siv ntsuas thiab lub tsev sensor,
- Qee qhov chaw sib khi hauv qab cov xwm txheej tsim nyog,
- Cov khoom siv twj tso kua mis / lub valve rau kev tiv taus tshuaj lom neeg.
Hauv kev lag luam hluav taws xob thiab kev tsim hluav taws xob, PPS kuj feem ntau raug xaiv rau cov khoom uas xav tau kev ruaj khov thiab kev tiv taus cua sov.
E. Cov Kev Siv Hauv Kev Lag Luam Dav Dav: Cov Bearings, Gears, thiab Cov Cheebtsam Sib Txhuam
Hauv qee qib PPS (feem ntau sib xyaw nrog cov roj nplaum / cov roj nplaum khov), PPS tuaj yeem siv rau:
- Bushing/bearing,
- Cov iav uas xav tau kev ruaj khov ntawm qhov ntev,
- Cov khoom txav tau uas xav tau kev tiv thaiv kev hnav thiab qhov sib txhuam qis dua.
Txawm li cas los xij, kev xaiv qib yog qhov tseem ceeb vim tias cov khoom tribological ntawm PPS tuaj yeem cuam tshuam los ntawm cov khoom sib xyaw.
5. Cov txiaj ntsig thiab kev cov nyom ntawm kev siv PPS
Cov txiaj ntsig tseem ceeb
- Kev ua haujlwm kub thiab tiv taus hluav taws
- Kev tiv thaiv tshuaj lom neeg dav dav
- Kev ruaj khov siab
- Haum rau cov iav / carbon fiber composites
Cov teeb meem uas yuav tsum xav txog
- Tus nqi siab dua li cov yas dav dav
- Kev ua tiav yuav tsum tau tswj qhov kub thiab tsim pwm kom zoo.
- Qee qib yuav tawg yooj yim dua yog tias tsis tau tsim los rau kev cuam tshuam.
– Kev xaiv cov khoom ntxiv/cov khoom ua kom muaj zog yuav tsum tau hloov kho kom haum rau qhov xav tau (piv txwv li hluav taws xob vs. tshuab vs. kev sib txhuam)
Xaus
Polyphenylene sulfide (PPS) yog ib hom yas engineering uas ua tau zoo heev uas tsim los ntawm kev polymerization ntawm cov tshuaj aromatics uas muaj sulfur hauv cov chaw ua haujlwm, ua raws li kev ntxuav, ziab, thiab pelletizing. Thaum cov resinized, PPS tuaj yeem pwm los ntawm kev txhaj tshuaj molding lossis lwm txoj hauv kev rau hauv cov khoom lag luam uas tiv taus cua sov, tiv taus tshuaj lom neeg, thiab ruaj khov rau cov ntawv thov precision. Vim nws cov khoom sib xyaw ua ke, PPS siv dav hauv tsheb, khoom siv hluav taws xob, cov khoom siv tshuaj lom neeg, roj & roj av, thiab qee yam khoom siv kho tshuab xws li iav thiab bushings.
Yog tias koj xav tau, kuv tuaj yeem kho tsab xov xwm no rau koj cov kev xav tau tshwj xeeb - piv txwv li, ib qho version uas muaj kev txawj ntse ntau dua (tham txog cov hom qib PPS, GF/CF reinforcement, lossis cov txheej txheem ua haujlwm dav dav) lossis ib qho version dav dav rau cov neeg nyeem uas tsis yog technical.
