Xyoo 1958, Goodrich Chemical Company (tam sim no renamed Lubrizol) tau sau npe TPU hom Estane thawj zaug.Tshaj li 40 xyoo dhau los, muaj ntau tshaj 20 lub npe lag luam thoob ntiaj teb, thiab txhua lub npe muaj ntau yam khoom lag luam.Tam sim no, TPU raw khoom tuam ntxhab feem ntau suav nrog BASF, Covestro, Lubrizol, Huntsman Corporation, Wanhua Chemical Group, Shanghai Heng'an, Ruihua, Xuchuan Chemical, thiab lwm yam.
1, Qeb TPU
Raws li cov qauv muag muag, nws tuaj yeem muab faib ua hom polyester, polyether type, thiab butadiene type, uas feem ntau muaj ester pawg, ether pawg, lossis butene pawg.
Raws li cov txheej txheem nyuaj, nws tuaj yeem muab faib ua hom urethane thiab urethane urea hom, uas feem ntau tau los ntawm ethylene glycol chain extenders lossis diamine chain extenders.Kev faib ua feem yog muab faib ua hom polyester thiab polyether hom.
Raws li muaj los yog tsis muaj kev sib txuas, nws tuaj yeem muab faib ua cov thermoplastic ntshiab thiab semi thermoplastic.
Lub qub muaj ib tug ntshiab linear qauv thiab tsis muaj cross-linking bonds;Cov tom kawg muaj me me ntawm cov ntawv sib txuas sib txuas xws li Allophanic acid ester.
Raws li kev siv cov khoom tiav, lawv tuaj yeem muab faib ua qhov profiled (ntau lub tshuab caij), cov kav dej (sheaths, bar profiles), films (cov ntawv, nyias daim hlau), nplaum, coatings, fibers, thiab lwm yam.
2, Synthesis ntawm TPU
TPU belongs rau polyurethane nyob rau hauv cov nqe lus ntawm molecular qauv.Yog li, nws tau sau ua ke li cas?
Raws li cov txheej txheem sib txawv, nws feem ntau muab faib ua ntau hom polymerization thiab kev daws teeb meem polymerization.
Hauv bulk polymerization, nws tseem tuaj yeem muab faib ua cov txheej txheem ua ntej polymerization thiab ib-kauj ruam raws li qhov muaj lossis tsis muaj cov tshuaj tiv thaiv ua ntej:
Txoj kev prepolymerization muaj reacting diisocyanate nrog macromolecular diols rau ib lub sij hawm ntawm lub sij hawm ua ntej ntxiv cov saw txuas ntxiv los tsim TPU;
Cov txheej txheem ib kauj ruam suav nrog kev sib xyaw ua ke thiab ua rau macromolecular diols, diisocyanates, thiab cov saw txuas ntxiv los tsim TPU.
Kev daws teeb meem polymerization koom nrog thawj zaug dissolving diisocyanate hauv cov kuab tshuaj, tom qab ntawd ntxiv macromolecular diols los ua rau lub sijhawm qee lub sijhawm, thiab thaum kawg ntxiv cov saw txuas ntxiv los tsim TPU.
Hom TPU mos ntu, qhov hnyav molecular, cov ntsiab lus nyuaj lossis mos, thiab TPU aggregation xeev tuaj yeem cuam tshuam qhov ntom ntawm TPU, nrog qhov ceev ntawm kwv yees li 1.10-1.25, thiab tsis muaj qhov sib txawv tseem ceeb piv rau lwm cov roj hmab thiab cov yas.
Nyob rau tib lub hardness, qhov ceev ntawm polyether hom TPU yog qis dua li ntawm polyester hom TPU.
3, Kev ua haujlwm ntawm TPU
TPU hais xav tau ntau yam txheej txheem los tsim cov khoom kawg, feem ntau yog siv cov txheej txheem melting thiab kev daws rau TPU ua.
Melting processing yog ib qho txheej txheem uas feem ntau siv hauv kev lag luam yas, xws li kev sib tov, dov, extrusion, tshuab molding, thiab molding;
Kev daws teeb meem yog txheej txheem ntawm kev npaj cov kev daws teeb meem los ntawm dissolving hais nyob rau hauv ib tug hnyav los yog ncaj qha polymerizing lawv nyob rau hauv ib tug hnyav, thiab ces txheej, spinning, thiab hais txog.
Cov khoom kawg ua los ntawm TPU feem ntau tsis tas yuav vulcanization crosslinking cov tshuaj tiv thaiv, uas tuaj yeem ua rau luv luv lub voj voog ntau lawm thiab rov siv cov khoom pov tseg.
4, Kev ua haujlwm ntawm TPU
TPU muaj cov qauv siab, siab zog, siab elongation thiab elasticity, zoo heev hnav tsis kam, roj tsis kam, tsis kub tsis kam, thiab kev laus ua haujlwm.
Lub zog tensile siab, siab elongation, thiab tsis tshua muaj compression mus tas li deformation tus nqi yog txhua yam tseem ceeb ntawm TPU.
XiaoU feem ntau yuav piav qhia txog cov khoom siv kho tshuab ntawm TPU los ntawm cov khoom xws li tensile zog thiab elongation, resilience, hardness, thiab lwm yam.
High tensile lub zog thiab siab elongation
TPU muaj zog tensile zoo heev thiab elongation.Los ntawm cov ntaub ntawv hauv daim duab hauv qab no, peb tuaj yeem pom tias lub zog tensile thiab elongation ntawm polyether hom TPU zoo dua li cov yas polyvinyl chloride thiab roj hmab.
Tsis tas li ntawd, TPU tuaj yeem ua tau raws li qhov yuav tsum tau ua ntawm kev lag luam khoom noj khoom haus nrog me me lossis tsis muaj cov khoom ntxiv ntxiv thaum lub sijhawm ua, uas tseem nyuaj rau lwm cov ntaub ntawv xws li PVC thiab roj hmab kom ua tiav.
Resilience yog rhiab heev rau qhov kub thiab txias
Lub resilience ntawm TPU yog hais txog qib uas nws sai sai rov qab los rau nws lub xeev qub tom qab lub deformation kev nyuaj siab yog relieved, qhia raws li lub zog rov qab, uas yog qhov piv ntawm deformation retraction ua hauj lwm rau cov hauj lwm yuav tsum tau los tsim deformation.Nws yog ib qho kev ua haujlwm ntawm dynamic modulus thiab sab hauv kev sib txhuam ntawm lub cev elastic thiab rhiab heev rau qhov kub thiab txias.
Qhov rov qab txo qis nrog qhov txo qis kom txog rau thaum qhov kub thiab txias, thiab elasticity sai dua.Qhov ntsuas kub no yog qhov kub ntawm crystallization ntawm cov ntu mos, uas yog txiav txim siab los ntawm cov qauv ntawm macromolecular diol.Polyether hom TPU yog qis dua polyester hom TPU.Thaum kub hauv qab qhov kub ntawm crystallization, lub elastomer yuav nyuaj heev thiab poob nws elasticity.Yog li ntawd, resilience yog zoo ib yam li ib tug rebound los ntawm ib tug nyuaj hlau.
Lub hardness ntau yog Shore A60-D80
Hardness yog qhov taw qhia ntawm cov khoom muaj peev xwm tiv taus deformation, qhab nia, thiab khawb.
Lub hardness ntawm TPU feem ntau yog ntsuas siv Shore A thiab Shore D hardness testers, nrog Shore A siv rau softer TPUs thiab Shore D siv rau nyuaj TPUs.
Lub hardness ntawm TPU tuaj yeem hloov kho los ntawm kev kho qhov feem ntawm cov khoom muag thiab cov saw tawv tawv.Yog li ntawd, TPU muaj qhov sib txawv hardness ntau, xws li Shore A60-D80, hla lub hardness ntawm roj hmab thiab yas, thiab muaj elasticity siab nyob rau hauv tag nrho cov hardness ntau yam.
Raws li qhov hardness hloov, qee yam khoom ntawm TPU yuav hloov.Piv txwv li, nce qhov hardness ntawm TPU yuav ua rau muaj kev hloov pauv xws li nce tensile modulus thiab tsim kua muag lub zog, nce rigidity thiab compressive kev nyuaj siab (load muaj peev xwm), txo elongation, nce ceev thiab dynamic tshav kub tiam, thiab nce ib puag ncig kuj.
5, Kev siv TPU
Raws li qhov zoo tshaj plaws elastomer, TPU muaj ntau yam khoom siv hauv qab cov lus qhia thiab tau siv dav hauv cov khoom siv niaj hnub, cov khoom ua si, cov khoom ua si, cov khoom siv kho kom zoo nkauj, thiab lwm yam.
Cov ntaub ntawv khau
TPU feem ntau yog siv rau cov ntaub ntawv khau vim nws zoo elasticity thiab hnav tsis kam.Cov khau khau uas muaj TPU yog qhov nyiam hnav ntau dua li cov khoom khau ib txwm muaj, yog li lawv tau siv ntau dua hauv cov khoom khau siab, tshwj xeeb tshaj yog qee cov khau kis las thiab khau xws li khau.
cev
Vim nws qhov softness, zoo tensile zog, muaj zog muaj zog, thiab tsis kam mus rau siab thiab tsis kub, TPU hoses yog dav siv nyob rau hauv Tuam Tshoj raws li cov roj thiab roj hoses rau txhua yam khoom xws li aircraft, tso tsheb hlau luam, tsheb, maus taus, thiab tshuab cuab yeej.
kab
TPU muab kua muag tsis kam, hnav tsis kam, thiab khoov cov yam ntxwv, nrog rau qhov kub thiab txias tsis kam ua tus yuam sij rau kev ua haujlwm cable.Yog li ntawd, nyob rau hauv Suav lag luam, advanced cables xws li tswj cables thiab fais fab cables siv TPUs los tiv thaiv cov ntaub ntawv txheej ntawm complex cable designs, thiab lawv cov kev siv tau nce zuj zus.
Cov cuab yeej kho mob
TPU yog ib qho kev nyab xeeb, ruaj khov thiab zoo PVC hloov khoom siv, uas yuav tsis muaj Phthalate thiab lwm yam tshuaj lom neeg, thiab yuav tsiv mus rau cov ntshav los yog lwm yam kua hauv cov tshuaj catheter lossis lub hnab kho mob ua rau muaj kev phiv.Nws kuj yog ib qho tshwj xeeb tsim extrusion qib thiab txhaj tshuaj TPU.
zaj duab xis
TPU zaj duab xis yog ib zaj duab xis nyias ua los ntawm TPU granular khoom los ntawm cov txheej txheem tshwj xeeb xws li dov, casting, tshuab, thiab txheej.Vim nws lub zog siab, hnav tsis kam, zoo elasticity, thiab huab cua tsis kam, TPU films tau dav siv hauv kev lag luam, khau ntaub, khaub ncaws haum, tsheb, tshuaj, hluav taws xob, kev kho mob, thiab lwm yam.
Post lub sij hawm: Feb-05-2020