Xyoo 1958, Goodrich Chemical Company (tam sim no hloov npe hu ua Lubrizol) tau sau npe rau TPU hom Estane thawj zaug. Tau 40 xyoo dhau los, muaj ntau tshaj 20 lub npe lag luam thoob ntiaj teb, thiab txhua hom muaj ntau yam khoom. Tam sim no, cov chaw tsim khoom siv TPU feem ntau suav nrog BASF, Covestro, Lubrizol, Huntsman Corporation, Wanhua Chemical Group, Shanghai Heng'an, Ruihua, Xuchuan Chemical, thiab lwm yam.
1, Pawg ntawm TPU
Raws li cov qauv ntu mos, nws tuaj yeem muab faib ua hom polyester, hom polyether, thiab hom butadiene, uas feem ntau muaj pawg ester, pawg ether, lossis pawg butene.
Raws li cov qauv ntu nyuaj, nws muaj peev xwm muab faib ua hom urethane thiab hom urethane urea, uas tau txais los ntawm ethylene glycol saw extenders lossis diamine saw extenders. Kev faib tawm dav dav yog muab faib ua hom polyester thiab hom polyether.
Raws li qhov muaj lossis tsis muaj kev sib txuas, nws tuaj yeem muab faib ua cov thermoplastic ntshiab thiab semi thermoplastic.
Tus qub muaj cov qauv linear ntshiab thiab tsis muaj kev sib txuas sib txuas; Qhov kawg muaj me me ntawm cov kev sib txuas sib txuas xws li Allophanic acid ester.
Raws li kev siv cov khoom tiav lawm, lawv tuaj yeem muab faib ua cov khoom profiled (ntau yam khoom siv tshuab), cov kav dej (sheaths, bar profiles), cov yeeb yaj kiab (cov ntawv, cov phaj nyias), cov nplaum, cov txheej txheem, cov fibers, thiab lwm yam.
2, Kev tsim cov TPU
TPU yog ib feem ntawm polyurethane hauv cov qauv molecular. Yog li, nws tau sib sau ua ke li cas?
Raws li cov txheej txheem sib txawv, nws feem ntau muab faib ua cov polymerization loj thiab cov tshuaj polymerization.
Hauv kev ua polymerization ntau, nws kuj tseem tuaj yeem muab faib ua txoj kev ua ntej polymerization thiab ib kauj ruam raws li qhov muaj lossis tsis muaj kev ua ntej tshuaj tiv thaiv:
Txoj kev prepolymerization cuam tshuam nrog kev cuam tshuam diisocyanate nrog macromolecular diols rau ib lub sijhawm ua ntej ntxiv cov saw txuas ntxiv los tsim TPU;
Txoj kev ib kauj ruam suav nrog kev sib tov thiab ua kom cov macromolecular diols, diisocyanates, thiab cov saw hlau txuas ntxiv ua ke los tsim TPU.
Kev ua kom cov kua polymerization suav nrog thawj zaug yaj diisocyanate hauv cov kuab tshuaj, tom qab ntawd ntxiv cov diols macromolecular kom ua rau muaj kev cuam tshuam rau ib lub sijhawm, thiab thaum kawg ntxiv cov saw hlau txuas ntxiv los tsim TPU.
Hom TPU mos mos, qhov hnyav molecular, cov ntsiab lus tawv lossis mos mos, thiab TPU lub xeev sib sau ua ke tuaj yeem cuam tshuam rau qhov ceev ntawm TPU, nrog rau 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 yas.
Ntawm tib qho hardness, qhov ceev ntawm polyether hom TPU qis dua li ntawm polyester hom TPU.
3, Kev Ua Haujlwm ntawm TPU
Cov khoom TPU xav tau ntau yam txheej txheem los tsim cov khoom kawg, feem ntau yog siv cov txheej txheem yaj thiab cov txheej txheem daws teeb meem rau kev ua TPU.
Kev ua cov yas yaj yog ib qho txheej txheem siv ntau hauv kev lag luam yas, xws li kev sib tov, dov, extrusion, tshuab molding, thiab molding;
Kev ua cov kua yog cov txheej txheem ntawm kev npaj cov kua los ntawm kev yaj cov khoom me me hauv cov kuab tshuaj lossis ncaj qha polymerizing lawv hauv cov kuab tshuaj, thiab tom qab ntawd txheej, tig, thiab lwm yam.
Cov khoom kawg ua los ntawm TPU feem ntau tsis xav tau kev sib txuas ntawm vulcanization, uas tuaj yeem ua rau lub voj voog ntau lawm luv dua thiab rov ua dua cov khoom pov tseg.
4, Kev Ua Tau Zoo ntawm TPU
TPU muaj cov modulus siab, lub zog siab, elongation siab thiab elasticity, zoo heev hnav tsis kam, roj tsis kam, kub tsis kam, thiab laus tsis kam.
Lub zog tensile siab, elongation siab, thiab qis compression mus sij hawm ntev deformation tus nqi yog cov txiaj ntsig tseem ceeb ntawm TPU.
XiaoU yuav piav qhia txog cov khoom siv kho tshuab ntawm TPU los ntawm cov yam xws li lub zog tensile thiab elongation, resilience, hardness, thiab lwm yam.
Lub zog tensile siab thiab elongation siab
TPU muaj lub zog tensile thiab elongation zoo heev. 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 ntawm polyvinyl chloride yas thiab roj hmab.
Ntxiv rau, TPU tuaj yeem ua tau raws li qhov xav tau ntawm kev lag luam zaub mov nrog me ntsis lossis tsis muaj cov khoom ntxiv thaum lub sijhawm ua tiav, uas kuj nyuaj rau lwm cov ntaub ntawv xws li PVC thiab roj hmab kom ua tiav.
Kev ywj pheej yog qhov rhiab heev rau qhov kub thiab txias
Qhov kev ua siab ntev ntawm TPU yog hais txog qib uas nws rov qab sai sai rau nws lub xeev qub tom qab kev ntxhov siab deformation raug tshem tawm, qhia ua lub zog rov qab, uas yog qhov sib piv ntawm kev ua haujlwm deformation retraction rau txoj haujlwm xav tau los tsim kev ua deformation. Nws yog ib qho haujlwm ntawm dynamic modulus thiab kev sib txhuam sab hauv ntawm lub cev elastic thiab rhiab heev rau qhov kub.
Qhov rov qab poob qis nrog qhov kub txo qis kom txog thaum muaj qhov kub thiab txias, thiab qhov elasticity nce ntxiv sai sai. Qhov kub no yog qhov kub crystallization ntawm cov ntu mos, uas yog txiav txim siab los ntawm cov qauv ntawm macromolecular diol. Polyether hom TPU qis dua polyester hom TPU. Thaum qhov kub qis dua qhov kub crystallization, elastomer ua nyuaj heev thiab poob nws qhov elasticity. Yog li ntawd, resilience zoo ib yam li qhov rov qab los ntawm qhov chaw ntawm cov hlau tawv.
Qhov nyuaj ntawm qhov nyuaj yog Shore A60-D80
Qhov nyuaj yog qhov qhia txog lub peev xwm ntawm cov khoom siv los tiv taus kev deformation, kev ntaus nqi, thiab kev khawb.
Qhov nyuaj ntawm TPU feem ntau yog ntsuas siv Shore A thiab Shore D hardness testers, nrog Shore A siv rau TPUs softer thiab Shore D siv rau TPUs tawv dua.
Qhov nyuaj ntawm TPU tuaj yeem hloov kho tau los ntawm kev kho qhov sib piv ntawm cov saw hlau mos thiab tawv. Yog li ntawd, TPU muaj qhov nyuaj ntau yam, txij li Shore A60-D80, uas suav nrog qhov nyuaj ntawm roj hmab thiab yas, thiab muaj elasticity siab thoob plaws tag nrho qhov nyuaj.
Thaum qhov nyuaj hloov pauv, qee yam khoom ntawm TPU yuav hloov pauv. Piv txwv li, kev ua kom qhov nyuaj ntawm TPU nce ntxiv yuav ua rau muaj kev hloov pauv ntawm kev ua tau zoo xws li kev nce tensile modulus thiab lub zog tsim kua muag, kev nce rigidity thiab compressive stress (load capacity), txo qis elongation, nce density thiab dynamic heat generation, thiab nce environmental resistance.
5, Daim Ntawv Thov TPU
Ua ib qho elastomer zoo heev, TPU muaj ntau yam khoom siv hauv qab thiab siv dav hauv cov khoom siv niaj hnub, cov khoom siv kis las, cov khoom ua si, cov ntaub ntawv kho kom zoo nkauj, thiab lwm yam.
Cov ntaub ntawv khau
TPU feem ntau yog siv rau cov khoom siv khau vim nws qhov elasticity zoo heev thiab tiv taus kev hnav. Cov khoom khau uas muaj TPU yooj yim hnav dua li cov khoom khau ib txwm muaj, yog li lawv siv dav dua hauv cov khoom khau siab, tshwj xeeb tshaj yog qee cov khau kis las thiab khau yooj yim.
cov yeeb nkab
Vim nws qhov mos mos, lub zog tensile zoo, lub zog cuam tshuam, thiab tiv taus qhov kub thiab txias siab thiab qis, TPU hoses siv dav hauv Suav teb ua cov roj thiab roj hoses rau cov khoom siv kho tshuab xws li dav hlau, tank, tsheb, maus taus, thiab cov cuab yeej tshuab.
xov hlau
TPU muab kev tiv thaiv kev tsim kua muag, kev tiv thaiv kev hnav, thiab cov yam ntxwv khoov, nrog rau kev tiv thaiv kub siab thiab qis yog qhov tseem ceeb rau kev ua haujlwm ntawm cable. Yog li hauv kev ua lag luam Suav teb, cov cables siab heev xws li cov cables tswj thiab cov cables fais fab siv TPUs los tiv thaiv cov ntaub ntawv txheej ntawm cov qauv cable nyuaj, thiab lawv cov ntawv thov tau dhau los ua qhov dav dua.
Cov khoom siv kho mob
TPU yog ib yam khoom siv hloov PVC uas muaj kev nyab xeeb, ruaj khov thiab zoo, uas yuav tsis muaj Phthalate thiab lwm yam tshuaj lom neeg, thiab yuav mus rau hauv cov ntshav lossis lwm yam kua hauv lub raj xa dej lossis lub hnab kho mob kom ua rau muaj kev phiv. Nws kuj yog ib qib extrusion thiab qib txhaj tshuaj TPU uas tsim tshwj xeeb.
zaj duab xis
Zaj duab xis TPU yog ib zaj duab xis nyias ua los ntawm cov khoom siv TPU granular los ntawm cov txheej txheem tshwj xeeb xws li dov, casting, tshuab, thiab txheej. Vim nws lub zog siab, hnav tsis kam, elasticity zoo, thiab tiv taus huab cua, zaj duab xis TPU tau siv dav hauv kev lag luam, cov ntaub ntawv khau, cov khaub ncaws hnav, tsheb, tshuaj lom neeg, hluav taws xob, kev kho mob, thiab lwm yam.
Lub sijhawm tshaj tawm: Lub Ob Hlis-05-2020