Lub hardness ntawm hnav- tiv thaiv polyurethane Cheebtsam yog ib qho tseem ceeb qhia txog cov khoom tsis kam rau compression thiab indentation; Nws yog feem ntau qhia siv Shore hardness nplai (Shore A lossis Shore D) *. Polyurethane cov ntaub ntawv nthuav tawm ntau dua elasticity yog feem ntau pom los ntawm Shore A hardness, feem ntau poob hauv 60A txog 95A ntau. Hloov pauv, cov khoom uas xav tau kev hnav zoo dua thiab kev nruj siv Shore D hardness, feem ntau ntawm 20D txog 50D. Kev ntsuas hardness feem ntau yog ua los ntawm tus qauv durometer, uas ntsuas cov khoom tsis kam rau indentation los ntawm nias lub indenter ntawm ib qho me me rau hauv nws qhov chaw. Qhov siab dua qhov hardness, qhov ntau dua cov khoom tiv thaiv rau kev puas tsuaj thiab nws cov load- bearing muaj peev xwm, txawm tias nws elasticity yuav raug txo me ntsis.
Kev xaiv ntawm hardness rau hnav-cov khoom tiv thaiv polyurethane ncaj qha cuam tshuam rau lawv txoj haujlwm ua haujlwm. Cheebtsam uas muaj zog dua yog haum rau siab - cuam tshuam thiab siab - ib puag ncig puas tsuaj - xws li cov uas pom nyob rau hauv mining crushers thiab pob zeb liners - qhov twg lawv muaj txiaj ntsig rau kev pab cuam lub neej. Hloov pauv, cov khoom siv nrog qhov qis qis yog qhov zoo tagnrho rau cov ntawv thov uas xav tau kev poob siab, kev tiv thaiv cov khoom siv, lossis kev tuav cov ntaub ntawv tsis yooj yim- xws li lub qhov rooj ntawm cov ntxaij vab tshaus vibrating thiab hopper liners - vim tias lawv pab txo cov khoom tawg thiab cov khoom siv.
