Kev loj hlob ntawmCov tshuaj polyester tsis muaj rojcov khoom muaj keeb kwm ntau tshaj 70 xyoo. Hauv lub sijhawm luv luv no, cov khoom siv polyester resin tsis tau saturated tau tsim kho sai sai hauv cov txiaj ntsig thiab theem kev txawj ntse. Txij li thaum cov khoom siv polyester resin tsis tau saturated yav dhau los tau tsim kho mus rau hauv ib qho ntawm cov ntau yam loj tshaj plaws hauv kev lag luam thermosetting resin. Thaum lub sijhawm tsim cov polyester resins tsis tau saturated, cov ntaub ntawv kev txawj ntse ntawm cov khoom patent, cov ntawv xov xwm lag luam, cov phau ntawv kev txawj ntse, thiab lwm yam tshwm sim ib qho tom qab ib qho. Txog tam sim no, muaj ntau pua daim ntawv pov thawj tsim khoom txhua xyoo, uas cuam tshuam nrog cov polyester resin tsis tau saturated. Nws tuaj yeem pom tias kev tsim khoom thiab kev siv tshuab ntawm cov polyester resin tsis tau saturated tau dhau los ua neeg laus dua nrog kev txhim kho ntawm kev tsim khoom, thiab tau maj mam tsim nws tus kheej tshwj xeeb thiab tiav kev tsim khoom thiab kev siv tswv yim. Hauv cov txheej txheem kev txhim kho yav dhau los, cov polyester resins tsis tau saturated tau ua rau muaj kev pab tshwj xeeb rau kev siv dav dav. Yav tom ntej, nws yuav tsim kho rau qee qhov chaw tshwj xeeb, thiab tib lub sijhawm, tus nqi ntawm cov resins dav dav yuav raug txo qis. Cov hauv qab no yog qee hom polyester resin uas nthuav thiab muaj kev cia siab, suav nrog: resin uas tsis tshua muaj shrinkage, resin uas tsis kub hnyiab, resin uas tawv, resin uas tsis tshua muaj styrene volatilization, resin uas tiv taus corrosion, resin uas gel coat, resin uas kho tau lub teeb Cov resin polyester uas tsis muaj unsaturated, resins uas pheej yig nrog cov khoom tshwj xeeb, thiab cov ntoo ntiv tes ua haujlwm tau zoo uas tau tsim los ntawm cov khoom siv raw thiab cov txheej txheem tshiab.
1. Cov tshuaj txhuam qis qis
Cov resin no tej zaum yuav yog ib qho lus nug qub. Cov polyester resin tsis muaj roj hmab nrog rau qhov loj me thaum lub sijhawm kho, thiab qhov ntim me me feem ntau yog 6-10%. Qhov kev me me no tuaj yeem ua rau cov khoom puas tsuaj lossis tawg, tsis yog hauv cov txheej txheem molding (SMC, BMC). Txhawm rau kov yeej qhov tsis zoo no, cov thermoplastic resins feem ntau yog siv ua cov khoom ntxiv me me. Daim ntawv pov thawj hauv thaj chaw no tau muab rau DuPont hauv xyoo 1934, tus lej patent US 1.945,307. Daim ntawv pov thawj piav qhia txog kev sib xyaw ua ke ntawm dibasic antelopelic acids nrog cov vinyl compounds. Nws yog qhov tseeb, thaum lub sijhawm ntawd, daim ntawv pov thawj no tau tsim cov thev naus laus zis me me rau polyester resins. Txij thaum ntawd los, ntau tus neeg tau mob siab rau kev kawm txog cov txheej txheem copolymer, uas tom qab ntawd suav tias yog cov yas alloys. Xyoo 1966 Marco cov resins me me tau siv thawj zaug hauv kev molding thiab kev tsim khoom lag luam.
Lub Koom Haum Kev Lag Luam Yas tom qab ntawd hu cov khoom no ua "SMC", uas txhais tau tias cov ntawv molding compound, thiab nws cov khoom sib xyaw ua ntej uas tsis tshua muaj zog "BMC" txhais tau tias cov khoom sib xyaw ua ke. Rau cov ntawv SMC, feem ntau yuav tsum tau ua kom cov khoom siv resin-molded muaj kev kam rau siab zoo, yooj ywm thiab A-qib gloss, thiab yuav tsum tsis txhob muaj cov kab nrib pleb me me ntawm qhov chaw, uas yuav tsum tau ua kom cov resin sib phim muaj qhov nrawm qis. Tau kawg, ntau daim ntawv pov thawj tau txhim kho thiab txhim kho cov thev naus laus zis no, thiab kev nkag siab txog cov txheej txheem ntawm cov nyhuv qis qis tau maj mam loj hlob, thiab ntau yam tshuaj tiv thaiv qis qis lossis cov khoom ntxiv qis tau tshwm sim raws li lub sijhawm xav tau. Cov khoom ntxiv qis qis uas siv feem ntau yog polystyrene, polymethyl methacrylate thiab lwm yam.
2. Cov tshuaj tua hluav taws
Qee zaum cov ntaub ntawv tiv thaiv hluav taws kub tseem ceeb npaum li kev cawm tshuaj, thiab cov ntaub ntawv tiv thaiv hluav taws kub tuaj yeem zam lossis txo qhov tshwm sim ntawm kev puas tsuaj. Hauv Tebchaws Europe, tus lej ntawm kev tuag los ntawm hluav taws tau txo qis li ntawm 20% hauv kaum xyoo dhau los vim yog kev siv cov tshuaj tiv thaiv hluav taws kub. Kev nyab xeeb ntawm cov ntaub ntawv tiv thaiv hluav taws kub nws tus kheej kuj tseem ceeb heev. Nws yog ib qho txheej txheem qeeb thiab nyuaj rau kev teeb tsa hom ntaub ntawv siv hauv kev lag luam. Tam sim no, Lub Zej Zog European tau thiab tab tom ua qhov kev ntsuam xyuas kev phom sij ntawm ntau cov tshuaj tiv thaiv hluav taws kub halogen thiab halogen-phosphorus. , ntau yam uas yuav ua tiav ntawm xyoo 2004 thiab 2006. Tam sim no, peb lub tebchaws feem ntau siv cov tshuaj chlorine-muaj lossis bromine-muaj diols lossis dibasic acid halogen hloov pauv ua cov khoom siv raw los npaj cov tshuaj tiv thaiv hluav taws kub. Cov tshuaj tiv thaiv hluav taws kub halogen yuav tsim ntau cov pa luam yeeb thaum hlawv, thiab nrog rau kev tsim cov hydrogen halide uas ua rau khaus heev. Cov pa luam yeeb tuab thiab cov pa luam yeeb lom uas tsim tawm thaum lub sijhawm hlawv ua rau muaj kev phom sij rau tib neeg.
Ntau tshaj 80% ntawm cov xwm txheej hluav taws kub yog tshwm sim los ntawm qhov no. Lwm qhov tsis zoo ntawm kev siv bromine lossis hydrogen-based flame retardants yog tias cov pa roj corrosive thiab ib puag ncig-polluting yuav tsim tawm thaum lawv raug hlawv, uas yuav ua rau puas tsuaj rau cov khoom siv hluav taws xob. Kev siv cov inorganic flame retardants xws li hydrated alumina, magnesium, canopy, molybdenum compounds thiab lwm yam flame retardant additives tuaj yeem tsim cov pa luam yeeb tsawg thiab cov tshuaj lom tsawg flame retardant resins, txawm hais tias lawv muaj cov teebmeem pom tseeb ntawm kev tswj pa luam yeeb. Txawm li cas los xij, yog tias qhov ntau ntawm inorganic flame retardant filler loj dhau, tsis yog tsuas yog viscosity ntawm cov resin yuav nce ntxiv, uas tsis zoo rau kev tsim kho, tab sis kuj thaum muaj ntau ntawm cov additive flame retardant ntxiv rau cov resin, nws yuav cuam tshuam rau lub zog kho tshuab thiab cov khoom hluav taws xob ntawm cov resin tom qab kho.
Tam sim no, ntau daim ntawv pov thawj txawv teb chaws tau tshaj tawm txog kev siv cov tshuaj tua hluav taws uas muaj phosphorus los tsim cov tshuaj tua hluav taws uas tsis muaj tshuaj lom thiab tsis muaj pa luam yeeb. Cov tshuaj tua hluav taws uas muaj phosphorus muaj cov nyhuv tua hluav taws zoo heev. Cov kua qaub metaphosphoric uas tsim thaum lub sijhawm hlawv tuaj yeem ua polymerized mus rau hauv lub xeev polymer ruaj khov, tsim ib txheej tiv thaiv, npog qhov chaw ntawm cov khoom hlawv, cais cov pa oxygen, txhawb kev qhuav dej thiab carbonization ntawm qhov chaw resin, thiab tsim cov zaj duab xis tiv thaiv carbonized. Yog li tiv thaiv kev hlawv thiab tib lub sijhawm cov tshuaj tua hluav taws uas muaj phosphorus kuj tseem siv tau ua ke nrog cov tshuaj tua hluav taws halogen, uas muaj cov txiaj ntsig synergistic pom tseeb heev. Tau kawg, kev tshawb fawb yav tom ntej ntawm cov tshuaj tua hluav taws uas muaj pa luam yeeb tsawg, tsis muaj tshuaj lom thiab pheej yig. Cov tshuaj zoo tagnrho yog tsis muaj pa luam yeeb, tsis muaj tshuaj lom, pheej yig, tsis cuam tshuam rau cov tshuaj, muaj cov khoom siv lub cev, tsis tas yuav ntxiv cov ntaub ntawv ntxiv, thiab tuaj yeem tsim ncaj qha hauv cov nroj tsuag tsim cov tshuaj.
3. Cov tshuaj nplaum tawv
Piv nrog rau cov thawj unsaturated polyester resin ntau yam, cov resin toughness tam sim no tau zoo dua heev. Txawm li cas los xij, nrog rau kev txhim kho ntawm kev lag luam downstream ntawm unsaturated polyester resin, ntau cov kev cai tshiab tau muab tso rau pem hauv ntej rau kev ua tau zoo ntawm unsaturated resin, tshwj xeeb tshaj yog nyob rau hauv cov nqe lus ntawm toughness. Lub brittleness ntawm unsaturated resins tom qab kho tau yuav luag dhau los ua teeb meem tseem ceeb txwv tsis pub txoj kev loj hlob ntawm unsaturated resins. Txawm hais tias nws yog cov khoom siv tes ua cast-molded lossis cov khoom molded lossis qhov txhab, qhov elongation ntawm tawg ua ib qho cim tseem ceeb rau kev ntsuam xyuas qhov zoo ntawm cov khoom resin.
Tam sim no, qee lub tuam txhab tsim khoom txawv teb chaws siv txoj kev ntxiv cov roj hmab saturated kom txhim kho kev tawv. Xws li ntxiv cov polyester saturated, styrene-butadiene roj hmab thiab carboxy-terminated (suo-) styrene-butadiene roj hmab, thiab lwm yam, txoj kev no yog rau txoj kev toughening lub cev. Nws kuj tseem siv tau los qhia cov polymers thaiv rau hauv cov saw tseem ceeb ntawm cov polyester tsis muaj roj hmab, xws li cov qauv network interpenetrating tsim los ntawm cov roj hmab polyester tsis muaj roj hmab thiab epoxy resin thiab polyurethane resin, uas ua rau lub zog tensile thiab lub zog cuam tshuam ntawm cov roj hmab zoo dua. , txoj kev toughening no yog rau txoj kev toughening tshuaj lom neeg. Kev sib xyaw ua ke ntawm kev toughening lub cev thiab kev toughening tshuaj lom neeg kuj tseem siv tau, xws li sib xyaw cov polyester tsis muaj roj hmab uas muaj zog ntau dua nrog cov khoom siv tsawg dua kom ua tiav qhov yooj ywm xav tau.
Tam sim no, SMC daim ntawv tau siv dav hauv kev lag luam tsheb vim lawv qhov hnyav sib dua, muaj zog siab, tiv taus corrosion, thiab tsim qauv yooj yim. Rau cov khoom tseem ceeb xws li cov vaj huam sib luag tsheb, qhov rooj tom qab, thiab cov vaj huam sib luag sab nraud, xav tau kev tawv zoo, xws li cov vaj huam sib luag sab nraud tsheb. Cov neeg tiv thaiv tuaj yeem khoov rov qab mus rau qee qhov thiab rov qab mus rau lawv cov duab qub tom qab muaj kev cuam tshuam me ntsis. Kev ua kom cov tawv ntawm cov resin feem ntau poob lwm yam khoom ntawm cov resin, xws li qhov nyuaj, lub zog flexural, tiv taus cua sov, thiab kev kho sai thaum lub sijhawm tsim kho. Kev txhim kho qhov tawv ntawm cov resin yam tsis poob lwm yam khoom ntawm cov resin tau dhau los ua ib qho tseem ceeb hauv kev tshawb fawb thiab kev txhim kho cov polyester resins tsis muaj roj.
4. Cov tshuaj styrene volatile tsawg
Thaum lub sijhawm ua cov tshuaj polyester resin uas tsis muaj roj, cov tshuaj styrene uas yaj tau yuav ua rau muaj kev puas tsuaj loj heev rau kev noj qab haus huv ntawm cov neeg ua haujlwm tsim kho. Tib lub sijhawm, styrene raug tso tawm mus rau hauv huab cua, uas kuj yuav ua rau muaj kuab paug loj heev. Yog li ntawd, ntau lub koom haum txwv qhov kev tso cai ntawm styrene hauv huab cua ntawm lub chaw tsim khoom. Piv txwv li, hauv Tebchaws Meskas, nws qib kev raug tso cai (qib kev raug tso cai) yog 50ppm, thaum nyob hauv Switzerland nws tus nqi PEL yog 25ppm, cov ntsiab lus qis no tsis yooj yim ua tiav. Kev cia siab rau qhov cua zoo kuj raug txwv. Tib lub sijhawm, qhov cua zoo kuj yuav ua rau styrene poob ntawm qhov chaw ntawm cov khoom thiab ua rau muaj ntau styrene mus rau hauv huab cua. Yog li ntawd, txhawm rau nrhiav txoj hauv kev los txo qhov kev yaj ntawm styrene, los ntawm cov hauv paus hniav, nws tseem tsim nyog ua tiav txoj haujlwm no hauv lub Hoobkas tsim cov tshuaj resin. Qhov no yuav tsum tau tsim cov resins uas tsis tshua muaj styrene volatility (LSE) uas tsis ua rau huab cua qias neeg lossis tsawg dua, lossis cov resins polyester tsis muaj styrene monomers.
Kev txo cov ntsiab lus ntawm cov volatile monomers tau yog ib qho kev kawm uas tau tsim los ntawm kev lag luam polyester resin txawv teb chaws hauv xyoo tas los no. Muaj ntau txoj kev siv tam sim no: (1) txoj kev ntxiv cov tshuaj tiv thaiv volatility qis; (2) kev tsim cov unsaturated polyester resins tsis muaj styrene monomers siv divinyl, vinylmethylbenzene, α-methyl Styrene los hloov cov vinyl monomers uas muaj styrene monomers; (3) Kev tsim cov unsaturated polyester resins nrog styrene monomers qis yog siv cov monomers saum toj no thiab styrene monomers ua ke, xws li siv diallyl phthalate Kev siv cov high-boiling vinyl monomers xws li esters thiab acrylic copolymers nrog styrene monomers: (4) Lwm txoj hauv kev los txo qhov volatilization ntawm styrene yog qhia lwm cov chav xws li dicyclopentadiene thiab nws cov derivatives rau hauv unsaturated polyesters Resin skeleton, kom ua tiav viscosity qis, thiab thaum kawg txo cov ntsiab lus ntawm styrene monomer.
Thaum nrhiav txoj hauv kev los daws qhov teeb meem ntawm styrene volatilization, nws yog qhov tsim nyog los xav txog qhov siv tau ntawm cov resin rau cov txheej txheem molding uas twb muaj lawm xws li kev txau saum npoo, txheej txheem lamination, SMC molding txheej txheem, tus nqi ntawm cov khoom siv raw rau kev tsim khoom lag luam, thiab kev sib raug zoo nrog cov txheej txheem resin. , Resin reactivity, viscosity, cov khoom siv kho tshuab ntawm resin tom qab molding, thiab lwm yam. Hauv kuv lub tebchaws, tsis muaj txoj cai lij choj meej meej txog kev txwv tsis pub volatilization ntawm styrene. Txawm li cas los xij, nrog kev txhim kho ntawm cov neeg lub neej thiab kev txhim kho ntawm cov neeg paub txog lawv tus kheej kev noj qab haus huv thiab kev tiv thaiv ib puag ncig, nws tsuas yog ib qho teeb meem ntawm lub sijhawm ua ntej txoj cai lij choj cuam tshuam yuav tsum muaj rau lub tebchaws tsis muaj neeg siv khoom zoo li peb.
5. Cov tshuaj tiv thaiv corrosion
Ib qho ntawm kev siv loj ntawm cov polyester resins unsaturated yog lawv txoj kev tiv thaiv corrosion rau cov tshuaj xws li cov organic solvents, acids, bases, thiab ntsev. Raws li kev qhia ntawm cov kws tshaj lij network resin unsaturated, cov resins tiv thaiv corrosion tam sim no tau muab faib ua cov pawg hauv qab no: (1) o-benzene hom; (2) iso-benzene hom; (3) p-benzene hom; (4) bisphenol A hom; (5) Vinyl ester hom; thiab lwm yam xws li xylene hom, halogen-muaj compound hom, thiab lwm yam. Tom qab ntau xyoo ntawm kev tshawb nrhiav tas mus li los ntawm ntau tiam neeg ntawm cov kws tshawb fawb, qhov corrosion ntawm resin thiab cov txheej txheem ntawm corrosion tsis kam tau kawm tiav. Cov resin yog hloov kho los ntawm ntau txoj kev, xws li kev qhia txog cov pob txha molecular uas nyuaj rau tiv thaiv corrosion rau hauv unsaturated polyester resin, lossis siv unsaturated polyester, vinyl ester thiab isocyanate los tsim cov qauv network interpenetrating, uas yog qhov tseem ceeb heev rau kev txhim kho qhov corrosion tsis kam ntawm cov resin. Qhov corrosion tsis kam yog qhov zoo heev, thiab cov resin tsim los ntawm txoj kev sib xyaw acid resin kuj tuaj yeem ua tiav qhov corrosion tsis kam zoo dua.
Piv nrogcov tshuaj epoxy,Tus nqi qis thiab yooj yim ua cov unsaturated polyester resins tau dhau los ua qhov zoo heev. Raws li cov kws tshaj lij unsaturated resin net, qhov kev tiv thaiv corrosion ntawm unsaturated polyester resin, tshwj xeeb tshaj yog qhov alkali tsis kam, yog qis dua li ntawm epoxy resin. Tsis tuaj yeem hloov epoxy resin. Tam sim no, kev nce ntawm cov plag tsev tiv thaiv xeb tau tsim cov cib fim thiab kev cov nyom rau unsaturated polyester resins. Yog li ntawd, kev tsim cov tshwj xeeb tiv thaiv xeb resins muaj kev cia siab dav.
Cov txheej gel ua lub luag haujlwm tseem ceeb hauv cov ntaub ntawv sib xyaw. Nws tsis yog tsuas yog ua lub luag haujlwm kho kom zoo nkauj ntawm qhov chaw ntawm FRP cov khoom, tab sis kuj ua lub luag haujlwm hauv kev tiv thaiv kev hnav, kev tiv thaiv kev laus thiab kev tiv thaiv tshuaj lom neeg corrosion. Raws li cov kws tshaj lij los ntawm unsaturated resin network, kev coj ua ntawm gel txheej resin yog los tsim cov gel txheej resin nrog qis styrene volatilization, cua qhuav zoo thiab muaj zog tiv thaiv corrosion. Muaj kev lag luam loj rau cov txheej gel tiv taus cua sov hauv gel txheej resins. Yog tias cov khoom FRP raug raus hauv dej kub ntev, cov blisters yuav tshwm sim ntawm qhov chaw. Tib lub sijhawm, vim yog qhov maj mam nkag mus rau hauv cov khoom sib xyaw, cov blisters ntawm qhov chaw yuav maj mam nthuav dav. Cov blisters yuav tsis tsuas yog cuam tshuam rau qhov tsos ntawm cov txheej gel yuav maj mam txo cov khoom muaj zog ntawm cov khoom.
Cook Composites thiab Polymers Co. ntawm Kansas, Tebchaws Meskas, siv cov txheej txheem epoxy thiab glycidyl ether-terminated los tsim cov gel txheej resin nrog viscosity qis thiab zoo heev dej thiab cov kuab tshuaj tiv thaiv. Tsis tas li ntawd, lub tuam txhab kuj siv polyether polyol-modified thiab epoxy-terminated resin A (flexible resin) thiab dicyclopentadiene (DCPD)-modified resin B (rigid resin) compound, ob qho tib si muaj Tom qab sib xyaw, cov resin nrog dej tsis tsuas yog muaj dej tsis zoo, tab sis kuj muaj kev tawv thiab lub zog zoo. Cov kuab tshuaj lossis lwm yam khoom qis-molecular nkag mus rau hauv FRP cov khoom siv system los ntawm cov txheej gel txheej, ua cov dej-resistant resin nrog cov khoom zoo heev.
7. Lub teeb kho cov tshuaj polyester tsis muaj zog
Cov yam ntxwv ntawm cov tshuaj polyester uas tsis muaj roj hmab ua kom lub teeb ci yog lub sijhawm ntev thiab kev kho sai. Cov tshuaj polyester uas tsis muaj roj hmab ua kom lub teeb ci tuaj yeem ua tau raws li qhov yuav tsum tau ua kom txo qhov volatilization ntawm styrene los ntawm kev kho lub teeb. Vim yog kev nce qib ntawm cov tshuaj photosensitizers thiab cov khoom siv teeb pom kev zoo, lub hauv paus rau kev tsim cov tshuaj photocurable tau tso tseg. Ntau yam tshuaj polyester uas tsis muaj roj hmab ua kom lub teeb ci tau tsim thiab muab tso rau hauv kev tsim khoom ntau heev. Cov khoom siv, kev ua haujlwm ntawm cov txheej txheem thiab kev tiv thaiv kev hnav ntawm qhov chaw tau txhim kho, thiab kev ua haujlwm ntawm kev tsim khoom kuj tau txhim kho los ntawm kev siv cov txheej txheem no.
8. Cov khoom siv pheej yig nrog cov khoom tshwj xeeb
Cov resins no suav nrog cov resins ua npuas dej thiab cov resins dej. Tam sim no, qhov tsis txaus ntawm lub zog ntoo muaj qhov sib txawv ntawm qhov ntau. Kuj tseem muaj qhov tsis txaus ntawm cov neeg ua haujlwm txawj ua haujlwm hauv kev lag luam ua ntoo, thiab cov neeg ua haujlwm no tau txais nyiaj ntau ntxiv. Cov xwm txheej zoo li no tsim cov xwm txheej rau cov yas engineering nkag mus rau hauv kev lag luam ntoo. Cov resins ua npuas dej tsis muaj roj thiab cov resins uas muaj dej yuav raug tsim los ua ntoo dag hauv kev lag luam rooj tog vim lawv tus nqi qis thiab cov khoom muaj zog siab. Daim ntawv thov yuav qeeb thaum pib, thiab tom qab ntawd nrog kev txhim kho tas mus li ntawm cov thev naus laus zis ua tiav, daim ntawv thov no yuav raug tsim kho sai.
Cov polyester resins uas tsis muaj roj tuaj yeem ua npuas los ua cov resins uas siv tau ua phab ntsa, chav dej faib ua ntej, thiab ntau ntxiv. Lub zog thiab lub zog ntawm cov yas ua npuas nrog cov polyester resin tsis muaj roj ua lub matrix zoo dua li cov PS ua npuas; nws yooj yim dua rau kev ua dua li cov PVC ua npuas; tus nqi qis dua li cov yas polyurethane ua npuas, thiab ntxiv cov tshuaj tua hluav taws kuj tuaj yeem ua rau nws ua hluav taws thiab tiv thaiv kev laus. Txawm hais tias cov thev naus laus zis siv cov resin tau tsim tag nrho, kev siv cov polyester resin ua npuas hauv rooj tog tsis tau them sai sai. Tom qab kev tshawb nrhiav, qee cov tuam txhab tsim cov resin muaj kev txaus siab rau kev tsim cov khoom siv tshiab no. Qee qhov teeb meem loj (skinning, honeycomb qauv, gel-foaming lub sijhawm sib raug zoo, exothermic curve tswj tsis tau daws tag nrho ua ntej kev tsim khoom lag luam. Txog thaum tau txais cov lus teb, cov resin no tsuas yog siv tau vim nws tus nqi qis hauv kev lag luam rooj tog. Thaum cov teeb meem no daws tau, cov resin no yuav siv dav hauv cov chaw xws li cov khoom siv ua npuas hluav taws es tsis yog siv nws cov nyiaj txiag xwb.
Cov tshuaj polyester uas muaj dej tsis muaj roj tuaj yeem muab faib ua ob hom: hom uas yaj tau hauv dej thiab hom emulsion. Txij li xyoo 1960s txawv teb chaws, muaj cov ntawv pov thawj thiab cov ntaub ntawv sau tseg hauv thaj chaw no. Cov tshuaj polyester uas muaj dej yog ntxiv dej ua cov tshuaj polyester uas tsis muaj roj rau cov tshuaj ua ntej cov tshuaj gel, thiab cov dej muaj txog li 50%. Cov tshuaj no hu ua WEP resin. Cov tshuaj no muaj cov yam ntxwv ntawm tus nqi qis, lub teeb tom qab kho, nplaim taws zoo thiab tsis ntsws. Kev tsim kho thiab kev tshawb fawb ntawm cov tshuaj uas muaj dej hauv kuv lub teb chaws tau pib xyoo 1980s, thiab nws tau siv sijhawm ntev heev. Hauv kev siv, nws tau siv los ua tus neeg sawv cev anchoring. Cov tshuaj polyester uas tsis muaj roj yog ib hom tshiab ntawm UPR. Cov thev naus laus zis hauv chav kuaj mob tau dhau los ua neeg laus dua, tab sis muaj kev tshawb fawb tsawg dua ntawm daim ntawv thov. Cov teeb meem uas yuav tsum tau daws ntxiv yog qhov ruaj khov ntawm cov tshuaj emulsion, qee qhov teeb meem hauv kev kho thiab molding, thiab qhov teeb meem ntawm kev pom zoo ntawm cov neeg siv khoom. Feem ntau, 10,000-ton unsaturated polyester resin tuaj yeem tsim tau txog 600 tons ntawm cov dej khib nyiab txhua xyoo. Yog tias qhov shrinkage tsim nyob rau hauv cov txheej txheem ntau lawm ntawm unsaturated polyester resin siv los tsim cov dej-muaj resin, nws yuav txo tus nqi ntawm resin thiab daws qhov teeb meem ntawm kev tiv thaiv ib puag ncig ntawm kev tsim khoom.
Peb ua lag luam hauv cov khoom siv resin hauv qab no: unsaturated polyester resin;cov roj hmab vinyl; gel txheej resin; epoxy resin.
Peb kuj tsim khoomfiberglass direct roving,cov ntaub fiberglass, fiberglass mesh, thiabfiberglass roving.
Tiv tauj peb:
Xov tooj: +8615823184699
Xov tooj: +8602367853804
Email:marketing@frp-cqdj.com
Lub sijhawm tshaj tawm: Lub Rau Hli-08-2022
