Dab tsi yogtusZog ntawm TPU 2?
Kev nyuaj
Hardness, cov khoom siv tiv thaiv kom deformation lossis indentation, yog kev txiav txim siab ntau los ntawm cov ntsiab lus nyuaj hauv TPU. Ntug dej A thiab ntug dej D2240 lossis ISO 868) yog feem ntau siv. TPU Hardness Puas tuaj yeem raug nyob thoob plaws qhov ntau - los ntawm ntug dej A70 los ntawm ntug dej D80-los ntawm kev hloov kho ntu ntu.
Nruj
Ntshai, ntsuas los ntawm Flexural Modulus (Astm D790), tsis ncaj qha qhia los ntawm ntug dej hardness tab sis yog cuam tshuam los ntawm ntu segment. TPU Tav Yuav nce nrog cov ntsiab lus segment nyuaj tab sis tseem khaws tau zoo.
Dynasic Khoom
TPU ua yeeb yam zoo nyob rau hauv kev thauj khoom zoo, cyclic ntxhov siab, thiab siab} zaus vibrations. Cov Ntsiab Lus Tseem Ceeb Dynicic xws li:
Cia Modulus (E '): Sawv cev rau txoj haujlwm ywj; Nws sib txawv nrog qhov kub thiab zaus.
Ploj modulus (e ''): Qhia txog lub zog tsis muaj peev xwm; Peaks nyob ze ntawm lub khob hloov cua kub (TG).
Poob Factor (TanΔ=e '' / e '): Tsom kwm damping kev ua tau zoo. Ib qho siab dua yog qhov zoo rau kev nqus dej ua poob siab (piv txwv li, cov nqi khau), thaum txo qis dua yog qhov zoo dua rau cov ntawv thov (piv txwv li, khoom siv kis las).
Thermal Khoom
TPus feem ntau haum rau ntev -}}}}}}}}}}}} xyoo raug rau 120 degree. Cov kev siv nyiaj siab dua kub tuaj yeem ua tiav los ntawm nce cov ntsiab lus theem nyuaj lossis xaiv cov saw tshwj xeeb lossis Diisocyanates. Decomposition feem ntau pib maj mam ntawm 150-200 degree, nrawm ntawm 200-250 degree. Polyester -} based tpus feem ntau muaj zoo dua thermal thiab oxidative stability tshaj ether-ua cov versions.
Kev Ua Dej Txog Kev
Vim yog lawv ester lossis ether urethane txuas, TPUs muaj kev cuam tshuam rau cov hydrolysis rau qee yam. Lawv txoj kev tawm tsam yog nyob ntawm cov qauv tshuaj, nrog kev txiav txim ntawm kev ruaj ntseg yog: Polyether> Polycaprolactone- raws li> polyester. Polyester - bused tpus depade feem ntau los ntawm ester hydrolysis, uas yog catalyzed los ntawm cov kua qaub; Qhov no tuaj yeem raug txiav kev siv cov carbodiimide additives. Etet aug -} Raws Tpus feem ntau detharane txoj kev pab hydrolysis.
Qhov tshwm sim ib puag ncig xws li cov av noo, thiab pH, nrog rau lub xub ntiag thiab cov antioxidants, cuam tshuam ntau yam hydrolysis tsis kam.