Thermoplastic Polyurethane (TPU) yog hom polyurethane uas tuaj yeem muab cov yas ua kom sov thiab yaj los ntawm cov kuab tshuaj. Piv nrog compounding thiab casting polyurethanes, thermoplastic polyurethanes muaj me me lossis tsis muaj molecules tau yog qhov tseeb ntawm kev hloov pauv ntawm lub cev.
Lub tswv yim ntawm kev hloov pauv ntawm lub cev ua ntej tshaj tawm los ntawm Schollenberge CS xyoo 1958. Nws hais txog "kev sib txuas cov ntsiab lus ntawm" Nws tsis yog qhov tseeb cov tshuaj hla kev hla, tab sis nws plays lub luag haujlwm ntawm cov tshuaj hla kev hla dej. Vim tias qhov kev hla lub cev ntawm lub cev, polyurethane ua multiphas muaj cov qauv kev tshawb nrhiav multiphological multiphological. Lub hydrogen bonds ntawm polyurethane ntxiv dag zog nws morphology thiab ua rau nws tiv taus ntau dua cov av noo.
Dab tsi yog cov kev faib tawm ntawm polyurethane tpu?
Tam sim no uas peb paub dab tsi thermoplastic polyurethane tpu yog, nws cov kev faib ua dab tsi? Raws li cov qauv sib txawv, TPU tuaj yeem faib ua ntau txoj kev sib txawv.
Piv txwv li, raws li tus qauv segment segment, nws tuaj yeem faib ua hom qib polyester, hom Esteriene, uas muaj pawg Esteriene, uas muaj cov pab pawg Estheriene, ether Pawg lossis Butene pawg lossis pawg neeg qib siab. Raws li cov qauv segment nyuaj, nws tuaj yeem faib ua lub zog ua haujlwm thiab urethane urea extender lossis cov saw duas txuas tau txuas ntxiv.
Feem ntau ntawm kev faib tawm yog hom qib polyester thiab hom polyether.
Raws li txawm muaj kev sib txuas hla, nws tuaj yeem faib ua cov ntshiab thermoplastic thiab semi-thermopicast. Tus qub yog ib hom qauv dawb huv tsis muaj kev sib txuas sib txuas; Cov tom kawg muaj ib qho me me ntawm kev sib txuas sib txuas xws li allophanate. Raws li kev siv cov khoom tiav, nws tuaj yeem muab faib ua cov khoom tshwj xeeb) thiab cov duab hluav taws xob) thiab cov ntawv qhia (nplooj ntawv) thiab cov nplaum thiab cov hmoov txhuas.