Ob lub ntsiab lus polyurethane yog ib qho polymer uas yog tsim los ntawm kev sib xyaw ob cov khoom xyaw. Thawj yog isocyanate compounds, thaum lub thib ob yuav yog cov tebchaw ntawm hydroxyl pawg. Cov khoom sib cuam tshuam los tsim cov polymer nrog cov qauv polyurethane.
Ntau yam ntawm polyurethane
Yuav kom tau txais cov khoom siv polymer, nws yuav tsim nyog los sib tov cov tawv tawv thiab cov hauv paus hauv qee qhov kev faib ua feem. Ob lub ntsiab lus polyurethane tuaj yeem sawv cev los ntawm txias thiab kub polymerization. Cov khoom siv tom kawg yuav tsum raug rau qhov kub siab, thaum lub qub polymerizes ntawm ntuj kub.
Lub ntsiab nta
Cov ntaub ntawv piav qhia uas siv rau pwm muaj cov yam ntxwv muaj zog, lawv tiv tausaggressive ib puag ncig thiab teeb meem cuam tshuam, nrog rau siab kub. Tag nrho cov nta no nthuav dav ntawm polyurethane. Nws yog tsim rau ntau lawm:
- xim;
- adhesive;
- sealants;
- varnishes.
Tom qab sib xyaw cov khoom sib xyaw, cov khoom sib xyaw tau txais cov dej ntws zoo heev, uas ua rau nws tuaj yeem ua cov khoom los ntawm nws siv tshuab casting. Raws li ib qho piv txwv, bushings rau mechanisms yuav txawv. Hauv tsab xov xwm peb tab tom tham txog ob lub ntsiab lus polyurethane txhaj tshuaj molding ntau yam. Cov khoom ntawm cov khoom yog txiav txim los ntawm cov khoom qub. Hauv qhov no, qhov sib xyaw ntawm isocyanate hardener thiab lub hauv paus tseem ceeb.
Ntxiv nta
Cov khoom siv tuaj yeem hloov pauv nyob ntawm qhov sib ntxiv ntawm cov khoom sib txawv, xws li muab tub lim thiab dyes. Qee cov polyurethanes hloov cov roj hmab, vim lawv elastic heev. Koj tuaj yeem pom cov polyurethanes uas tuaj yeem kho lawv cov qub qub thaum muaj kev puas tsuaj rau cov khoom siv, uas ua rau lawv muaj txiaj ntsig tshwj xeeb hauv kev lag luam.
Txheej txheem cej luam ntawm thaj chaw siv
Ob lub ntsiab lus polyurethane tau siv dav niaj hnub no. Cov khoom siv yog siv los ua cov hniav nyiaj hniav kub, ntau yam mechanisms thiab casting zog. Cov khoom ua haujlwm ntawm cov khoom tau txais yog qhov siab heev. Qhov no tso cai rau cov khoom siv txawm tias nyob rau hauv cov xwm txheej nyuaj. Raws li qhov tshwm sim, nws muaj peev xwm tau txais cov khoom khov, tawv thiab tshuaj tiv thaiv. Cov tom kawg tuaj yeem yog:
- gears;
- shafts;
- pulleys;
- wheels;
- rollers;
- siv sij hawm;
- sealing ntsiab;
- ntau yam txheej tiv thaiv;
- couplings;
- pipelines;
- bearing parts;
- bushings.
Cov khoom npaj tau txais txiaj ntsig zoo thiab siv sijhawm ntev, vim tias lawv tuaj yeem hnav thiab muaj zog. Liquid elastic ob lub ntsiab lus polyurethane ua lub hauv paus ntawm lub log rau lub laub thiab cov khoom thauj. Yog li ntawd, nws muaj peev xwm tau txais cov khoom uas muaj zog ntau dua li cov roj hmab. Lawv npaj ua haujlwm txawm tias lub tread raug puas lawm.
Cov khoom tsim los ntawm kev txhawb nqa thiab kev taw qhia cov menyuam, uas tau ua haujlwm nrog cov siv thiab cov khoom siv conveyor. Cov ntsiab lus tau npaj kom siv tau ntev dua li cov roj hmab iav siv, lem thiab lem.
Cov khoom siv yog siv rau kev poob siab absorbers thiab sealing cov ntsiab lus, vim hais tias nws yog ntau resistant rau hnav thiab lub zog. Yog li ntawd, cov khoom siv roj hmab tsis ntev los no tau nce ntxiv los ntawm polyurethane. Nyob rau tib lub sij hawm, elasticity tseem nyob rau tib theem. Ob lub ntsiab lus cam khwb cia polyurethane tau pom daim ntawv thov hauv kev tsim cov kav dej, uas muaj cov tshuaj tiv thaiv thiab lub zog. Cov ntsiab lus tiav. Tsis tas li ntawd, nrog kev pab ntawm cov khoom siv, cov kav dej tuaj yeem tiv thaiv tsis tsuas yog sab hauv, tab sis kuj los ntawm sab nraud.
Tshaj tawm ntawm kev siv ntxiv
Raws li cov neeg siv khoom, ob lub ntsiab lus polyurethane yog siv hauv kev tsim khoomadhesives thiab xim thiab varnishes. Cov sib tov tom qab polymerization yog resistant rau sab nraud tsis zoo influences, tuav ruaj khov thiab npaj txhij mus ua hauj lwm rau lub sij hawm ntev. Cov kua polyurethane tshwj xeeb tshaj yog siv hauv kev tsim cov pwm uas tau tsim los ntawm kev siv tshuab casting. Tom qab ntawd, cov khoom zoo li no yog siv rau casting:
- paj;
- polyester resin;
- wax;
- gypsum.
Raws li cov neeg siv khoom, cov kua dej ob lub ntsiab lus polyurethane kuj tseem siv rau hauv cov tshuaj, qhov twg cov khoom siv los ua lub hauv paus rau cov hniav tshem tawm. Polyurethane feem ntau siv rau hauv kev tsim cov hniav nyiaj hniav kub. Nws tuaj yeem muab nchuav rau hauv cov plag tsev, uas yog cov yam ntxwv ntawm kev ua haujlwm ntev, hnav tsis kam thiab siab load peev.
Polyurethane qhov chaw ua haujlwm zoo dua cov hlau hauv qee qhov chaw, raws li cov neeg siv khoom. Txawm li cas los xij, cov cuab yeej tsim khoom siv tau yooj yim dua, uas ua rau nws tuaj yeem tau txais cov khoom me me thiab cov castings loj, qhov qub uas tuaj yeem hnyav tsis ntau tshaj li ib gram, thaum tom kawg tuaj yeem hnyav 500 kg lossis ntau dua.
Ntau txog pwm polyurethane
Ob-tiv thaiv pwm ua polyurethane muaj peev xwm tiv taus qee yam ntawm cov castings. Yog tias peb tab tom tham txog cov khoom lag luam zoo tib yam, ces pob zeb casting tuaj yeem nqa tawm yam tsawg 1200 zaug. Yog tias cov ntaub ntawv zoo tshaj plaws tau siv rau hauv cov txheej txheem pwm tsim thiab cov kev xav tau sib xyaw tau ua tiav, ces cov pwm yuav npaj kom tiv taus txog li 4000 castings. Qhov no kuj muaj tseebrau rooj plaub thaum cov pwm raug ua rau lub tshuab nqus tsev, thiab kuj tau siv rau cov khoom siv tsis zoo abrasive, txhoj puab heev thiab nplaum.
Kev paub koj tus kheej nrog ntau yam ntawm kev lag luam thoob ntiaj teb, koj yuav nkag siab tias polyurethane hnub no yog sawv cev los ntawm ntau lub npe, ntawm lawv nws yuav tsum tau sau tseg:
- vulcoprenes;
- vulkollans;
- adiprenes;
- poramoldy.
Yog tias koj nyiam cov npe Lavxias, ces koj yuav tsum xaiv NITs-PU 5, SKU-PFL-100. Lawv yog tsim los ntawm polyesters ntawm domestic ntau lawm, thiab qhov zoo yog tsis phem tshaj li txawv teb chaws analogues. Ntxiv mus, lawv yog cov thawj coj hauv qee qhov kev txwv.
Polyurethane qib sib txawv hauv cov tshuaj muaj pes tsawg leeg, tus naj npawb ntawm urethane pawg, kev tsim kho ntawm cov saw hlau polymer thiab cov khoom hnyav molecular ntawm cov khoom. Cov cuab yeej tuaj yeem hloov kho los ntawm kev ua tib zoo xaiv cov khoom siv raw. Raws li qhov tshwm sim, tuaj yeem tau txais cov saw hlau txuas thiab nrum polymer.
YPolyurethane pwm additives
Ob lub ntsiab lus polyurethane rau pwm tuaj yeem ntxiv nrog cov khoom sib txawv, uas yog:
- hloov pauv;
- dyes.
Lawv tsim nyog los txhim kho qhov zoo ntawm cov khoom sib xyaw. Piv txwv li, cov kev hloov pauv yog siv los ua kom cov tshuaj tiv thaiv sai, uas ntxiv rau cov khoom me me. Raws li rau pigments, lawv muaj peev xwm hloov qhov tsos ntawm lub caij los ntawm kev kho xim. Txhawm rau txo cov ntsiab lus yas, cov khoom ntim tau siv, uas kuj ua rau cov khoom pheej yig dua.
Cov khoom sau tuaj yeem yog:
- talc;
- chalk;
- carbon dub;
- tshuaj, iav, carbon fibers.
Txawm li cas los xij, daim ntawv teev npe no tsis tuaj yeem hu ua tiav. Polyurethane pwm rau pob zeb muaj xim ntxoov los ntawm lub teeb daj mus rau xim av. Yog tias koj siv cov tshuaj ntxiv tshwj xeeb, koj tuaj yeem tau txais yuav luag txhua yam xim.
Zaj lus
Polyurethanes niaj hnub no tau pom lawv daim ntawv thov hauv yuav luag txhua qhov chaw ntawm kev lag luam. Cov khoom siv kuj tseem siv tau hauv lub neej txhua hnub. Cov kua ob-tivthaiv polyurethane yog ib qho ntawm cov lus qhia pheej hmoo. Nws siv tau yooj yim thiab nrawm ua haujlwm ntawm casting los ntawm pob zeb thiab gypsum. Nrog kev pab los ntawm polyurethane, nws tau dhau los ua cov ntaub ntawv me me, paving slabs thiab cov khoom zoo nkauj txawm nyob hauv tsev.
