1. Kev Txheeb Xyuas Txog TPU
Thermoplastic Polyurethane (TPU)yog ib qho elastomer linear block copolymer elastomer uas muaj kev ua tau zoo heev uas sib xyaw cov yam ntxwv zoo ntawm roj hmab thiab yas engineering. Nws muaj qhov zoo heev elasticity, lub zog kho tshuab, hnav tsis kam, thiab thermoplastic processability. Tsis zoo li cov roj hmab cross-linked ib txwm muaj, TPU muaj cov qauv cross-linking uas rov qab tau los ntawm hydrogen bonds, uas ua rau muaj kev ua kom sov dua, yaj thiab molding yam tsis muaj kev puas tsuaj loj heev. Cov yam ntxwv tshwj xeeb no ua rau TPU yog ib qho ntawm cov khoom siv thermoplastic elastomer (TPE) uas siv tau ntau tshaj plaws hauv kev tsim khoom lag luam, khoom siv rau cov neeg siv khoom, tsheb, kev kho mob thiab lwm yam teb.
Qhov kev ua tau zoo ntawm cov khoom TPU tiav lawm yog txiav txim siab los ntawm nws cov khoom siv raw, qhov sib piv thiab cov txheej txheem polymerization. Tag nrho cov khoom siv TPU lag luam yog polymerized los ntawm peb cov khoom siv raw tseem ceeb: cov saw ntev polyols, diisocyanates, thiab cov saw luv luv.
2. Cov Khoom Siv Raw Tseem Ceeb ntawm TPU
TPU yog ib qho khoom siv sib xyaw ua ke uas muaj cov ntu mos thiab ntu tawv sib hloov. Cov ntu mos muab TPU nrog kev ywj pheej, kev tawv thiab kev tiv taus kub qis, thaum cov ntu tawv muab kev tawv, lub zog tensile, kev tiv taus hnav thiab kev ruaj khov thermal. Peb cov khoom siv raw tseem ceeb sib raug rau kev tsim ntawm ob qho qauv ntu no.
2.1 Cov Polyols Ntev (Cov Khoom Siv Raw Mos)
Cov polyols ntev (cov diols ntev) yog cov khoom siv tseem ceeb rau kev tsim cov ntu mos ntawm TPU, nrog rau qhov hnyav molecular ntawm 1000 txog 3000 g / mol. Lawv yog cov khoom tseem ceeb ntawm TPU qhov elasticity thiab kev ywj pheej. Raws li cov qauv tshuaj lom neeg, polyols feem ntau muab faib ua ob pawg, uas txiav txim siab qhov kev faib tawm yooj yim thiab qhov sib txawv ntawm kev ua tau zoo ntawm TPU.
PolyesterPolyol: Tsim los ntawm cov tshuaj polycondensation ntawm dicarboxylic acids thiab diols. TPU tsim los ntawm polyester polyols muaj lub zog zoo heev, tiv taus kev sib txhuam, tiv taus roj thiab tiv taus kev laus. Nws muaj lub zog tensile siab thiab tiv taus kev tsim kua muag, thiab tsim nyog rau kev tsim cov khoom siv hnav siab, cov foob lag luam, cov ntaub ntawv khau thiab cov khoom nplaum. Txawm li cas los xij, polyester-based TPU muaj kev tiv thaiv hydrolysis tsis zoo thiab qhov kub qis toughness, thiab yooj yim hydrolysis thiab degradation hauv cov chaw noo noo ntev.
PolyetherPolyol: Polymerized los ntawm lub nplhaib qhib polymerization ntawm ether monomers. Polyether-raws li TPU muaj qhov zoo heev hydrolysis tsis kam, qis kub yooj ywm, dej tsis kam thiab microbial tsis kam. Nws tseem yoog tau thiab ruaj khov nyob rau hauv qhov kub tsawg heev, thiab tsis yooj yim rau dej thiab kab mob eroded. Nws yog dav siv rau hauv cov yeeb yaj kiab tsis muaj dej, cov khoom siv hauv qab dej, hlau thiab cable sheaths, thiab qis kub tsis kam. Nws qhov tsis zoo yog qhov qis dua me ntsis hnav tsis kam thiab roj tsis kam piv rau polyester TPU.
2.2 Diisocyanates (Cov Khoom Siv Raw Hard Segment Core)
Diisocyanates yog cov monomers reactive uas muaj NCO functional groups, uas react nrog hydroxyl pawg ntawm polyols thiab saw extenders los tsim cov qauv nyuaj, thiab yog qhov tseem ceeb rau kev txiav txim siab TPU qhov nyuaj, rigidity thiab thermal stability. Cov diisocyanate feem ntau siv hauv kev lag luam TPU yog MDI (Methylene Diphenyl Diisocyanate), uas muaj cov khoom siv tshuaj ruaj khov, kev ua haujlwm siab thiab kev hloov pauv qis, thiab tsim nyog rau feem ntau cov khoom TPU dav dav thiab kev ua haujlwm siab.
Ntxiv rau, cov diisocyanates qib tshwj xeeb xws li HDI thiab IPDI yog siv los ua aliphatic TPU. Cov TPU no tsis muaj cov qauv benzene nplhaib hauv cov saw molecular, qhia txog kev tiv thaiv daj zoo heev, kev ruaj khov ntawm lub teeb thiab kev tiv thaiv huab cua, thiab tshwj xeeb yog siv rau cov khoom sab nraum zoov, cov khoom dai kom zoo nkauj pob tshab, cov khoom sab nraud tsheb thiab cov khoom lag luam xim zoo.
2.3 Cov Khoom Siv Txuas Ntxiv Cov Saw Luv (Cov Khoom Siv Raw Uas Pab Txhawb Nqa)
Cov saw txuas yog cov diols luv luv uas muaj qhov hnyav molecular qis (feem ntau yog 1,4-Butanediol, BDO), uas cuam tshuam nrog cov diisocyanates ntau dhau los ua cov cheeb tsam tawv ntom. Lawv ua lub luag haujlwm tseem ceeb hauv kev kho qhov nyuaj, modulus thiab cov khoom siv kho tshuab ntawm TPU. Los ntawm kev hloov qhov sib piv ntxiv ntawm cov saw txuas, cov chaw tsim khoom tuaj yeem tswj tau qhov nyuaj ntawm TPU los ntawm 60 Shore A (lub xeev roj hmab mos) mus rau 85 Shore D (lub xeev yas tawv).
Cov qauv nyuaj uas tsim los ntawm cov saw hlau txuas thiab diisocyanates tsim cov ntsiab lus sib txuas ntawm lub cev los ntawm kev sib txuas hydrogen ntawm cov saw hlau molecular, uas ua kom ntseeg tau tias TPU muaj roj hmab zoo li elasticity ntawm chav tsev kub, thiab tuaj yeem yaj thiab ntws ntawm qhov kub siab rau kev txhaj tshuaj molding, extrusion, tshuab molding thiab lwm yam thermoplastic processing.
3. Kev faib tawm ntawm TPU raws li cov mis raw khoom
Raws li hom polyol raw khoom, cov khoom siv TPU industrial feem ntau muab faib ua peb series, npog feem ntau cov xwm txheej thov:
Polyester TPU: Cov khoom siv raw polyester polyol feem ntau yog cov khoom siv, muaj zog heev, tiv taus kev hnav thiab tshuaj lom neeg, tsim nyog rau kev lag luam hnav-resistant qhov chaw, khau hauv qab, tawv zaj duab xis thiab cov ntaub ntawv sib txuas.
Polyether TPU: Raws li cov ntaub ntawv raw polyether polyol, nrog kev ua haujlwm hydrolysis zoo dua thiab kev ua haujlwm kub qis, siv dav hauv cov yeeb yaj kiab tsis muaj dej tsis nkag, cov khoom siv kho mob, cov ntaub ntawv cable thiab cov khoom siv tiv taus txias.
TPU Hloov Kho Tshwj Xeeb: Raws li peb yam khoom siv raw, ntxiv cov khoom siv ua haujlwm (cov tshuaj tiv thaiv hluav taws, cov neeg sawv cev tiv thaiv ultraviolet, cov khoom tawv, thiab lwm yam) lossis siv cov qauv polyol sib xyaw los tsim cov tshuaj tiv thaiv hluav taws, tiv taus huab cua, pob tshab, tiv thaiv kab mob thiab lwm yam khoom siv TPU tshwj xeeb rau cov xwm txheej siab kawg.
4. Cov Khoom Tseem Ceeb Uas Txheeb Xyuas Los Ntawm Cov Khoom Siv Raw
Qhov sib piv sib xws thiab hom TPU raw khoom ncaj qha txiav txim siab qhov ua tau zoo ntawm cov khoom siv kawg, qhia txog cov yam ntxwv kho tau pom tseeb:
- Kev Kho Tau Qhov NyuajKev kho qhov sib piv ntawm cov ntu tawv (diisocyanate + saw hlau txuas ntxiv) tuaj yeem ua tiav qhov kev hloov pauv ntawm TPU, npog cov elastomer mos rau cov yas engineering nyuaj.
- Cov Khoom Siv Kho Tshuab: Cov ntaub ntawv raw Polyester coj lub zog tensile siab thiab hnav tsis kam; cov ntaub ntawv raw polyether ua kom zoo dua qhov tawv thiab qaug zog tsis kam.
- Kev Hloov Kho Ib puag ncig: Polyether TPU tiv taus hydrolysis thiab kub qis; aliphatic diisocyanate raw cov ntaub ntawv txhim kho kev tiv thaiv huab cua thiab kev tiv thaiv kev daj.
- Kev Ua Haujlwm ZooKev faib tawm ntawm cov khoom siv raw khoom uas tsim nyog ua kom muaj kev yaj zoo, ua rau TPU hloov kho rau ntau yam thev naus laus zis ua cov thermoplastic thiab txhawb nqa kev rov ua dua tshiab.
5. Cov yam ntxwv ntawm kev tsim khoom thiab kev ua tiav
Cov khoom siv raw TPU yog tsim los ntawm kev polymerization ntau lossis kev daws teeb meem polymerization. Tom qab kev sib piv meej ntawm polyols, diisocyanates thiab saw extenders, cov ntaub ntawv dhau los ntawm kev kub siab polymerization, kev sib txuas ntxiv saw, txias thiab pelletizing los ua cov khoom siv raw TPU pellet sib xws. Tag nrho cov txheej txheem ntau lawm tsis muaj cov plasticizers, thiab cov khoom siv raw tiav lawm tsis muaj tshuaj lom thiab zoo rau ib puag ncig, ua tau raws li cov qauv kev tiv thaiv ib puag ncig thoob ntiaj teb xws li RoHS thiab REACH.
Ua ib yam khoom siv thermoplastic, TPU cov khoom siv raw pellets tuaj yeem ua tiav ncaj qha los ntawm cov khoom siv yas ib txwm muaj. Cov khoom seem thiab cov khoom pov tseg uas tsim tawm thaum lub sijhawm ua tiav tuaj yeem rov ua dua tshiab, yaj thiab rov siv dua, nrog rau kev poob khoom tsawg thiab kev siv cov peev txheej siab, uas ua raws li kev txhim kho ntawm kev tsim khoom ntsuab.
6. Cov Ntawv Thov Tseem Ceeb ntawm TPU Raw Materials
Tau txais txiaj ntsig los ntawm kev ua tau zoo ntawm cov qauv raw khoom, TPU raw khoom siv dav hauv ntau yam lag luam:
- Kev Lag Luam TshebCov khoom siv sab hauv tsheb, cov khoom nqus dej, cov yeeb nkab tsis muaj dej, cov hlau thiab cov hlua khi, vam khom cov khoom siv TPU hloov kho uas muaj zog thiab tiv taus huab cua.
- Cov Khoom Siv thiab Khau: Cov khau ua si hauv qab, cov thawv tiv thaiv xov tooj, cov khoom siv thauj khoom, cov siv roj hmab, siv cov roj hmab elasticity siab thiab hnav tsis kam ntawm polyester TPU.
- Kev Kho Mob & Cov Khoom Siv Txhua Hnub: Cov catheters kho mob, cov khoom siv tiv thaiv, cov khoom siv qib zaub mov, siv cov khoom siv raw polyether TPU uas muaj kev nyab xeeb rau zaub mov thiab hydrolysis-resistant.
- Kev Tsim Khoom Lag LuamCov gaskets uas tsis yooj yim hnav, cov siv conveyor, cov hoses hydraulic, cov zaj duab xis nplaum, siv tag nrho cov khoom siv TPU raw uas muaj zog thiab ruaj khov.
- Kev Lag Luam Zog Tshiab & Khoom Siv Hluav Taws XobCov yeeb yaj kiab tiv thaiv roj teeb, cov khoom siv hluav taws xob hloov pauv tau yooj yim, cov khoom siv rwb thaiv hluav taws xob, siv cov khoom siv hloov kho hluav taws xob thiab cov khoom siv rwb thaiv hluav taws xob TPU.
7. Kev Txhim Kho ntawm TPU Raw Materials
Nrog kev txhim kho ntawm kev tsim khoom lag luam thiab kev txhim kho ntawm cov kev cai tiv thaiv ib puag ncig, cov khoom siv TPU raw tab tom txhim kho mus rau kev ua tau zoo, kev tiv thaiv ib puag ncig thiab kev hloov kho. Kev lag luam tau cog lus rau kev tshawb fawb thiab kev tsim cov khoom siv bio-based polyol raw los hloov cov khoom siv roj av ib txwm muaj, txo cov pa roj carbon. Tib lub sijhawm, cov khoom siv TPU tshwj xeeb uas tiv taus huab cua siab, hluav taws kub siab, pob tshab siab thiab tiv taus kub qis heev tau raug hloov kho tas li kom ua tau raws li cov kev cai ua tau zoo ntawm lub zog tshiab, aerospace, kev kho mob siab thiab lwm yam kev lag luam tshiab. Tsis tas li ntawd, cov khoom siv TPU hloov kho dua tshiab thiab biodegradable tau dhau los ua qhov kev tshawb fawb tseem ceeb, txhawb kev txhim kho kev lag luam TPU.
Lub sijhawm tshaj tawm: Lub Rau Hli-15-2026