2024 Tus sau: Beatrice Philips | [email protected]. Kawg hloov kho: 2024-01-18 12:13
Polyester cob yog cov khoom siv tshwj xeeb uas tau siv hauv ntau qhov kev lag luam. Nws muaj qhov sib xyaw ua ke yooj yim nrog cov lej loj. Kab lus no yuav tham txog cov yam ntxwv ntawm cov khoom no, nws lub ntsiab yam ntxwv thiab yam khoom.
Nws yog dab tsi?
Cov muaj pes tsawg leeg ntawm polyester cob yog tsim los ntawm cov polyester tshwj xeeb (kwv yees li 70%). Nws tseem muaj cov kuab tshuaj (txog 30%). Nws muaj peev xwm txo qis qib viscosity ntawm cov khoom . Cov tshuaj kuj tseem muaj tus pib, cov tshuaj tiv thaiv ua lub nrawm ntawm cov tshuaj tiv thaiv, ib qho kev tiv thaiv uas tiv thaiv cov tshuaj nkag los ntawm polymerization ntawm nws tus kheej.
Tom qab sib tov tag nrho cov ntsiab lus sib koom ua ke ua ntej pib kho cov tshuaj tiv thaiv, cov polyester yuav muaj qhov hnyav me me . Thaum lub sij hawm polymerization, cov khoom yuav pib tsim ua peb-seem mesh-type qaum, thiab lawv qhov hnyav yuav loj tuaj. Cov txiaj ntsig sib koom ua ke ua rau ua kom tawv thiab ntom ntawm cov khoom.
Cov khoom thiab cov yam ntxwv
Cia peb txheeb xyuas cov yam ntxwv tseem ceeb thiab cov khoom ntawm polyester cob:
- qib qis ntawm thermal conductivity;
- kev pab lub neej ntev;
- nce qib ntawm kev tiv thaiv ya raws;
- zoo hluav taws xob insulating zog;
- ntau yam;
- tsis kam mus rau qhov ua ntawm ntau yam khoom siv tshuaj;
- tshwj xeeb tsis kam hloov pauv kub sai.
Cov tshuaj no, hauv daim ntawv npaj siv tau, zoo sib xws hauv kev sib xyaw ua kua zib ntab . Thiab kuj muaj pes tsawg leeg muaj peev xwm lees txais ntau yam xim los ntawm daj rau xim av. Txawm hais tias muaj cov xim, cov khoom yog pob tshab. Tab sis nws yog ib qho tseem ceeb kom nco ntsoov tias polyester resins muaj kev phom sij rau tib neeg thiab, yog tias siv tsis raug, tuaj yeem ua teeb meem rau kev noj qab haus huv. Qhov txaus ntshai yog sawv cev los ntawm cov khoom siv styrene, uas suav nrog hauv lawv cov muaj pes tsawg leeg. Nws yog tshuaj lom thiab hlawv tau. Cov tshuaj yuav tsum tau siv nrog kev saib xyuas zoo tshaj plaws.
Tab sis hauv daim ntawv khov, cov khoom tuaj yeem siv tau yam tsis muaj kev puas tsuaj. Ib qho ntxiv, cov thev naus laus zis niaj hnub ua rau nws muaj peev xwm txo qis kev phom sij ntawm cov tshuaj zoo li no. Hauv khw muag khoom koj tuaj yeem pom cov ntxhiab tsw ntxhiab nrog cov ntsiab lus qis kawg nkaus . Shrinkage yog tus yam ntxwv rau polyesters. Nws tuaj yeem nce txog 8-10%.
Txawm hais tias tus txheej txheem nws tus kheej siv sijhawm qee lub sijhawm, yog li ntawd, kev cais tawm tsis tuaj yeem pom tam sim.
Cov muaj pes tsawg leeg tso cai rau koj los tsim cov txheej ruaj, txhim khu kev qha . Hauv qhov no, dhau sijhawm, qhov tawg me me thiab lwm yam tsis xws tuaj yeem tsim rau nws. Feem ntau, cov khoom lag luam coated nrog polyesters tseem tau kho nrog cov tshuaj tshwj xeeb uas tuaj yeem ua rau muaj zog ntxiv thiab hnav tsis kam ntawm txheej. Cov ntaub ntawv zoo li no muaj cov ntsiab lus melting siab (220-240 degrees). Lawv qhov ceev yog li 1.2 g / cm3. Cov ncauj lus kom ntxaws ntawm polyester resin tuaj yeem pom hauv GOST 27952-88.
Tsis txhob hnov qab tias cov khoom tau xa hauv "tsis quav ntsej" polymerization, yog li tom qab lub sijhawm luv luv nws yuav siv tsis tau. Lub neej txee ntawm polyesters feem ntau tsis pub dhau 6 lub hlis.
Kev sib piv nrog epoxy
Nws tsim nyog hais txog qhov sib txawv ntawm polyester thiab epoxy compounds. Yog li, cov khoom siv dag zog, muaj peev xwm nplaum tau zoo dua hauv qhov kev xaiv thib ob . Thiab kuj cov khoom siv epoxy yuav muab lub sijhawm ua haujlwm ntev dua, nws muaj peev xwm rhaub. Tab sis tib lub sijhawm, cov khoom siv polyester yooj yim dua rau siv. Thaum ua ntawv thov epoxy, koj yuav tsum muaj qee yam txuj ci, vim tias thaum lub sijhawm txheej txheem kho nws sai sai nws cov viscosity, nws yuav dhau los ua haujlwm nyuaj nrog cov khoom siv.
Polyester tshwj xeeb tshaj yog tiv taus UV hluav taws xob . Ib qho ntxiv, nws muaj tus nqi qis dua. Rau kev tsim khoom ntawm ntau yam khoom lag luam uas yuav tsum hnav, nrog rau kev tiv thaiv dej thiab ua kom muaj zog, cov tshuaj epoxy yuav yog qhov kev xaiv zoo tshaj plaws. Nws yog ib qho tseem ceeb kom nco ntsoov tias nws tsis muaj cov ntsiab lus carcinogenic, nws tsis muaj nplaim hluav taws, thiab muaj kev nyab xeeb kiag rau thauj.
Saib
Cia peb ua tibzoo saib ntawm cov yam ntxwv ntawm qee yam ntawm cov khoom siv zoo li no.
Txaus
Cov tshuaj no tuaj yeem muaj cov sib txawv sib txawv, lawv qhov hnyav hnyav tuaj yeem qis thiab siab. Thiab lawv kuj yog ob qho tib si khov thiab ua kua. Cov kua nplaum yog cov khoom siv hluavtaws polymer uas tsis muaj ob lossis peb npaug sib luag hauv cov qauv txheej txheem . Cov sib txuas no feem ntau hu ua alkyd resins.
Cov qauv no tuaj yeem ncaj lossis ceg ntoo. Daim ntawv thov tseem ceeb ntawm cov khoom no yog kev tsim cov txheej tawv tawv rau cov khoom yob. Nws raug tso cai coj nws hauv kev tsim cov xim luam tawm thiab yob nrog txheej txheej tiv tshav kub.
Cov khoom noj uas muaj zaub mov tshwj xeeb yog ruaj khov thiab ruaj khov. Lawv tiv taus rau ntau yam kev cuam tshuam hauv huab cua, lawv xyaum tsis ua kom muaj kuab paug.
Tsis txaus
Qhov ntau yam no suav tias yog qhov feem ntau. Nws muaj ob lossis peb npaug nyiaj hauv nws cov qauv txheej txheem . Xws li kev sib xyaw ua ke tau los ntawm kev sib xyaw ua ke uas tshwm sim ntawm cov kua qaub tsis txaus. Cov tshuaj tsis txaus ntseeg feem ntau siv hauv kev tsim cov ntaub ntawv moulding, toners thiab laser tshuab luam ntawv. Lawv khav theeb siab ntawm kev tiv thaiv tshav kub, siab ua kom muaj zog, lub zog tensile, thiab lub zog khov kho.
Ntau yam kuj tseem tiv taus tshuaj xeb . Nws muaj cov khoom tshwj xeeb dielectric. Thaum rhaub, muaj pes tsawg leeg muaj cov kua zoo heev. Kev siv cov khoom tsis txaus yog qhov tshwj xeeb. Qhov no tuaj yeem piav qhia los ntawm qhov tseeb tias cov polymers tuaj yeem kho tau txawm tias nyob hauv chav sov. Ntxiv mus, tsis muaj cov khoom puas tsuaj yuav raug tso tawm rau ib puag ncig. Cov tshuaj ua kom tawv tawv rau cov tshuaj saturated thiab cov tsis txaus muaj nyob hauv cov khw muag khoom cais. Lawv muag hauv cov thawv uas muaj ntau qhov sib txawv.
Cov txheej txheem tsim khoom
Niaj hnub no, hauv cov khw tshwj xeeb, cov neeg siv khoom tuaj yeem tuaj yeem yuav cov khoom lag luam polyester los ntawm cov tuam txhab tsim khoom sib txawv
" Rempolimer" cov . Lub tuam txhab no tsim Neon S-1 cob. Cov tshuaj muaj qhov qis viscosity. Cov khoom lag luam raug tsim nrog styrene siv cov khoom ua kom zoo tshwj xeeb. Cov tshuaj no yog qhov zoo tshaj plaws rau kev kho tsheb, nrog rau kev kho ua haujlwm ntawm lub nkoj. Ua kom tawv tawv ntawm cov muaj pes tsawg leeg tshwm sim kwv yees li 40-45 feeb tom qab thov.
Reflex . Lub tuam txhab tsim khoom German no tsim cov khoom siv ntau yam uas haum rau laminating ntau yam khoom. Cov khoom muaj cov ntsiab lus styrene txo. Cov tshuaj yog qhov txawv los ntawm kev ua siab zoo rau iav, cov khoom siv hlau.
Thaum lub sijhawm tsim khoom, tshwj xeeb yas yas ntxiv rau qhov hnyav, uas ua rau muaj pes tsawg leeg haum rau ntim cov khoom hlau.
Norsodyne . Nyob rau hauv cov npe no, polyester cob tau tsim, uas yuav tsis plam nws cov khoom muaj txiaj ntsig nrog qhov raug rau lub teeb. Cov khoom lag luam ntawm cov khoom lag luam tau tiv taus tiv thaiv hluav taws xob ultraviolet. Cov tshuaj no feem ntau siv hauv ntau yam kev ua tiav. Rau cov qauv no, tshwj xeeb cov tawv tawv (Butanox) tau tsim cais. Cov yas yuav muaj cov khoom ua kom zoo txawm tias nyob nruab nrab kub.
Novol . Cov khoom lag luam yog siv los ua cov nplaum thaum ua haujlwm nrog cov khoom ua los ntawm roj hmab. Qee lub sij hawm nws kuj tseem siv los ua cov khoom ntim tau zoo. Cov cob yuav pab kaw qhov khoob ntawm iav, hlau, ntoo thiab yas yas. Lub tuam txhab cov khoom lag luam tuaj yeem khav ntawm qhov nyuaj thiab ua tau ntev.
Eskim . Cov chaw tsim khoom tsim cov resins nrog qib viscosity qis, yog li lawv yooj yim dua rau siv. Cov khoom lag luam muaj qhov nkag siab me ntsis rau qhov hnyav. Yog tias tsim nyog, tinting tuaj yeem ntxiv rau qhov loj. Nws sib xyaw tau yooj yim nrog yuav luag txhua cov xim. Koj tseem tuaj yeem ntxiv talcum, gypsum lossis cement thiab siv cov khoom thaum nchuav rau hauv pem teb.
Kamtex-Polyethers . Cov chaw tsim khoom no nyob hauv Russia. Nws tshwj xeeb hauv kev tsim cov ntau yam tsis txaus. Lawv tsim los kho kom sai li sai tau. Cov sib xyaw ua ke no tau tsim los ntawm cov tshuaj orthophthalic acid. Lawv khav theeb cov cuab yeej zoo, tiv taus zoo rau cov khoom siv tshuaj lom neeg thiab ya raws.
Cov ntawv thov
Polyester resins tau siv dav hauv ntau yam haujlwm
- Tsev . Cov khoom siv dav siv hauv kev tsim cov iav fiberglass, uas tau nruab nrog cov iav fiberglass tshwj xeeb. Cov khoom zoo li no yuav hnyav, muaj cov qauv pob tshab thiab cov khoom siv zoo. Cov ntu no kuj feem ntau siv los tsim ntau yam kev vov tsev, hinged qauv, teeb pom kev zoo. Ib qho ntxiv, chav da dej thiab rooj tuaj yeem ua los ntawm cov yas polyester. Nws feem ntau siv los tsim cov khoom siv tes ua zoo nkauj. Yog tias tsim nyog, cov khoom tuaj yeem pleev xim tau yooj yim hauv txhua xim.
- Kev Nkoj Nkoj . Feem ntau ntawm cov khoom hauv nkoj tsim kho tau sib kho nrog kev pab ntawm cov yas, vim tias lawv muaj kev tiv thaiv zoo heev rau cov dej noo. Txawm tias tom qab lub sijhawm ntev, cov qauv yuav tsis rot.
- Mechanical engineering . Polyester cob yog suav tias yog ib feem tseem ceeb ntawm kev ua haujlwm hauv tsheb. Thiab kuj tseem sib xyaw ua ke tuaj yeem tsim los ntawm nws.
- Tshuaj lom neeg kev lag luam . Polyesters yog siv hauv cov kav dej siv thauj cov roj. Tom qab tag nrho, cov tshuaj no muaj kev tiv thaiv zoo rau cov tshuaj lom neeg.
Nws yuav tsum tau sau tseg tias polyesters feem ntau siv los tsim cov pob zeb dag . Hauv qhov no, qhov hnyav yuav tsum tau diluted nrog cov khoom siv ntxiv: cov khoom siv ntxhia, cov zas xim. Qee zaum cov khoom sib xyaw tau yuav rau kev txhaj tshuaj molding. Kev sib xyaw tshwj xeeb kuj tseem tsim rau ua haujlwm nrog yas ua npuas dej, rau nchuav cov plag tsev. Cov khoom tshwj xeeb muaj nyob rau niaj hnub no. Thaum ua kom khov, lawv tso cai rau koj los ua khawm, thav duab thav duab, thiab ntau yam khoom dai kom zoo nkauj. Cov hom no xyaum ua ntoo ntoo zoo.
Elastic polyesters tau siv los tsim cov kaus mom tiv thaiv, ua si pob, laj kab . Lawv tuaj yeem tiv taus qhov hnyav poob siab. Resins tiv taus qhov cuam tshuam ntawm huab cua tau siv hauv kev tsim cov teeb pom kev hauv tsev, ru tsev, vaj huam sib luag rau sab nrauv ntawm cov tsev.
Kev tsim cov phiaj xwm dav dav tuaj yeem haum rau yuav luag txhua yam khoom.
Yuav ua li cas ua haujlwm nrog cov yas?
Tom ntej no, peb yuav tshuaj xyuas yuav ua li cas thiaj ua haujlwm tau zoo nrog cov khoom siv no. Feem ntau, nrog rau cov resins, muaj cov lus qhia ntxaws rau kev siv.
Kev cog qoob loo thiab siv
Hauv theem no, thawj zaug koj yuav tsum ntsuas qhov xav tau ntawm polyester cob, txhua qhov sib piv tuaj yeem pom hauv cov lus qhia. Koj yuav tsum pib ua haujlwm nrog me me . Tom ntej no, ntxiv tus tsuj roj. Koj yuav tsum tau maj mam ua kom muaj pes tsawg leeg. Tom qab tag nrho cov khoom sib xyaw maj mam thiab sib xyaw kom huv. Thaum ntxiv tus tsuj roj ntxiv, qhov hloov pauv xim yuav tshwm sim. Yog tias tam sim no tseem muaj qhov kub nce ntxiv, qhov no yuav txhais tau tias yog pib ntawm polymerization.
Thaum koj xav tau qeeb cov txheej txheem ua kom tawv, nws tsim nyog muab lub khob ntim nrog cov khoom hauv lub thoob ntim nrog dej txias . Thaum qhov sib tov hloov mus rau hauv cov kua gelatinous, lub sijhawm ntawm nws daim ntawv thov xaus. Cov txheej txheem no feem ntau siv sijhawm nruab nrab ntawm 30 txog 60 feeb. Nws yog qhov tsim nyog los siv cov khoom siv rau cov khoom ua ntej qhov kawg ntawm lub sijhawm no. Tom qab ntawd koj yuav tsum tau tos kom txog thaum ua tiav polymerization tshwm sim, cov tshuaj dries los ntawm ob peb teev mus rau ob hnub.
Tib lub sijhawm, polyesters tuaj yeem tau txais tag nrho lawv cov khoom tsuas yog tom qab 7-14 hnub.
Kev nyab xeeb engineering
Thaum ua haujlwm nrog polyesters, nws yog qhov tsim nyog yuav tsum nco ntsoov cov cai tseem ceeb txog kev nyab xeeb. Yog li, Hnav khaub ncaws tiv thaiv thiab hnab looj tes ua ntej . Kev siv tsom iav tshwj xeeb kuj tau pom zoo. Cov tshuaj yuav tsum tsis txhob cuam tshuam nrog thaj tsam ntawm daim tawv nqaij. Yog tias cov polyesters tseem nyob ntawm daim tawv nqaij, tam sim ntawd yaug thaj chaw no kom zoo nrog dej huv thiab xab npum, nws yog qhov zoo tshaj plaws los siv tus neeg sawv cev tshwj xeeb uas tsim los ntxuav cov yas.
Txhawm rau kom tsis txhob nqus cov pa ua pa polyester thaum ua haujlwm, koj yuav tsum tau hnav lub tshuab ua pa . Hauv chav uas qhov kev kho mob tau ua tiav, yuav tsum tsis muaj cov khoom siv cua sov, qhov chaw qhib hluav taws. Thaum muaj hluav taws, nws tsis tuaj yeem siv dej. Txhawm rau tua hluav taws, koj yuav tsum siv cov tshuaj tua hluav taws lossis tsuas yog xuab zeb.
Cia
Nws tsim nyog nco txog txoj cai khaws cia rau cov khoom sib xyaw polyester. Nws yog qhov zoo tshaj los tso lawv rau hauv thaj chaw uas muaj cua nkag tau zoo. Qhov zoo tshaj plaws kub yog 20 degrees Celsius. Feem ntau, cov tshuaj polyester tau khaws cia rau hauv lub tub yees, tab sis yuav tsum tsis pub kom khov. Hauv qhov no, cov tshuaj tuaj yeem siv tau thoob plaws xyoo. Thaum lub sijhawm khaws cia, nws raug txwv tsis pub tso cai tshav ntuj nkag mus rau hauv lub ntim nrog cov khoom.
Pom zoo:
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