Thaum nws los txog rau kev xaiv cov khoom siv rau koj cov khoom tom ntej, nws yog ib qho tseem ceeb uas yuav tsum ntsuas qhov zoo thiab qhov tsis zoo ntawm txhua qhov kev xaiv. Hauv tsab ntawv blog no, peb yuav muab piv rau ob yam khoom nrov: silicone roj hmab thiab polyurethane.
Dab tsi yog silicone roj hmab thiab polyurethane?
Silicone roj hmab thiab polyurethane yog ob qho kev siv elastomers. Lawv yog cov khoom siv ruaj khov uas tuaj yeem siv rau ntau yam kev siv, tab sis muaj qee qhov sib txawv tseem ceeb ntawm lawv.
Silicone roj hmab yog cov roj hmab hluavtaws ua los ntawm silicone, ib qho sib xyaw ntawm silicon thiab oxygen, txhais tau tias nws muaj peev xwm rov qab mus rau nws qhov qub qub tom qab tau ncab lossis compressed. Silicone roj hmab muaj ntau yam khoom muaj txiaj ntsig, suav nrog kev kub siab ua haujlwm, tsis muaj tshuaj lom, thiab tiv thaiv huab cua thiab kev laus. Nws yog siv rau ntau yam kev siv, suav nrog cov ntsaws ruaj ruaj, gaskets, hluav taws xob rwb thaiv tsev, thiab cov khoom siv tsheb.
Polyurethane yog lwm cov roj hmab hluavtaws ua los ntawm polyurethane, qhov sib xyaw ntawm carbon, hydrogen, thiab oxygen, tab sis nws tsis hloov pauv li silicone roj hmab. Polyurethane kuj muaj ntau yam muaj txiaj ntsig, nrog rau kev ua haujlwm siab thiab ua kom yooj yim. Nws yog siv nyob rau hauv ntau yam kev siv xws li hloov tau ua npuas ncauj cushions, coatings, adhesives, thiab sealants.
Dab tsi yog qhov txawv ntawm silicone roj hmab thiab polyurethane?
Thaum nws los txog rau kev xaiv cov khoom siv rau koj cov khoom, nws yog ib qho tseem ceeb uas yuav tau xav txog cov yam ntxwv ntawm txhua qhov kev xaiv. Qhov no yog qhov tseeb tshwj xeeb tshaj yog thaum txiav txim siab ntawm silicone roj hmab thiab polyurethane. Txawm hais tias ob qho tib si cov ntaub ntawv yog cov kev xaiv zoo tshaj plaws rau ntau yam khoom, lawv muaj cov yam ntxwv sib txawv uas yuav ua rau ib qho zoo dua li lwm tus.
Ib qho tseem ceeb sib txawv ntawm silicone roj hmab thiab polyurethane yog durometer, los yog hardness. Silicone roj hmab muaj ntau yam hardness, los ntawm mos heev mus rau heev nyuaj. Qhov no ua rau nws zoo tagnrho rau cov khoom uas yuav tsum tau mos los yog hloov tau, xws li gaskets lossis seals. Polyurethane kuj muaj ntau yam hardness, tab sis nws cov kev xaiv nyuaj yog nyuaj tshaj li silicone roj hmab cov kev xaiv nyuaj. Qhov no ua rau polyurethane zoo dua rau cov khoom uas yuav tsum tau ruaj khov, xws li lub log lossis casters.
Lwm qhov sib txawv ntawm silicone roj hmab thiab polyurethane yog cov txheej txheem kho. Silicone rubbers yog kho los ntawm ntau txoj kev, suav nrog cua sov, chav tsev kub vulcanization, thiab hluav taws xob. Polyurethane muaj ntau qhov txwv ntawm kev kho cov txheej txheem.
Thaum kawg, Silicone roj hmab feem ntau yog kub resistant thiab ruaj tshaj polyurethane, tab sis nws tseem kim dua. Polyurethane, ntawm qhov tod tes, yog hloov tau yooj yim dua thiab muaj qhov qis dua, ua rau nws hnyav dua.
Dab tsi yog cov txiaj ntsig ntawm silicone roj hmab?
Silicone roj hmab muaj ntau yam txiaj ntsig uas ua rau nws zoo tagnrho rau kev siv ntau yam kev lag luam thiab kev siv. Ib qho ntawm cov txiaj ntsig tseem ceeb tshaj plaws ntawm silicone roj hmab yog nws tsis kam mus rau qhov kub thiab txias. Qhov no txhais tau hais tias nws tuaj yeem siv rau hauv qhov chaw kub kub tsis muaj kev ntshai ntawm kev puas tsuaj lossis kev puas tsuaj. Tsis tas li ntawd, silicone roj hmab kuj tseem tiv taus cov tshuaj lom neeg, ua rau nws yog cov khoom siv zoo tshaj plaws rau kev siv nyob rau hauv cov xwm txheej uas muaj peev xwm raug rau cov tshuaj hnyav.
Dab tsi yog cov txiaj ntsig ntawm polyurethane?
Polyurethane yog cov khoom siv ruaj khov thiab ruaj khov uas tuaj yeem siv rau ntau yam kev siv. Nws yog resistant to tearing thiab abrasion, ua rau nws yog ib qho zoo tagnrho xaiv rau high-hnav cov khoom xws li tsheb qhov chaw, gears, thiab rollers. Polyurethane kuj tseem tsis muaj dej thiab tiv taus tshuaj tua kab mob, ua rau nws zoo tagnrho rau siv sab nraum zoov.
Kev cuam tshuam Environmental: lawv cuam tshuam li cas rau ib puag ncig?
Txawm hais tias ob qho tib si polyurethane thiab silicone roj hmab yog cov khoom siv hluavtaws tsim los ntawm polymerization, lawv muaj cov khoom sib txawv uas ua rau lawv txhua tus tsim nyog rau kev siv tshwj xeeb. Qhov sib txawv tseem ceeb ntawm ob yog polyurethane yog thermoset thaum silicone roj hmab yog thermoplastic. Qhov no txhais tau hais tias ib zaug polyurethane kho, nws tsis tuaj yeem yaj thiab hloov kho zoo li silicone roj hmab tuaj yeem. Lwm qhov sib txawv tseem ceeb yog tias polyurethane muaj cov pa roj carbon thaum silicone roj hmab tsis muaj.
Thaum nws los txog rau ib puag ncig, ob qho tib si cov ntaub ntawv muaj qhov zoo thiab qhov tsis zoo. Ntawm qhov ntxiv, tsis muaj cov tshuaj lom lossis cov hlau hnyav kom lawv tuaj yeem muab pov tseg yam tsis muaj kev puas tsuaj rau ib puag ncig. Txawm li cas los xij, vim tias lawv yog cov khoom siv hluavtaws ua los ntawm cov khoom siv roj av, lawv tsis yog biodegradable thiab yuav nyob twj ywm hauv qhov chaw pov tseg rau ntau xyoo.
Thaum twg yog silicone roj hmab qhov kev xaiv zoo tshaj plaws?
Muaj ntau hom roj hmab, thiab txhua tus muaj cov khoom tshwj xeeb uas ua rau nws zoo dua rau qee yam kev siv. Silicone roj hmab yog ib hom roj hmab ntau yam, thiab nws muaj ntau yam kev siv. Nov yog qee qhov xwm txheej thaum silicone roj hmab yog qhov kev xaiv zoo tshaj plaws:
-Thaum koj xav tau cov roj hmab uas muaj peev xwm tiv taus qhov kub thiab txias: Silicone roj hmab tuaj yeem tiv taus qhov kub ntawm -55 ° C txog + 300 ° C, ua rau nws zoo tagnrho rau cov ntawv thov uas lwm cov roj hmab yuav ua tsis tau.
-Thaum koj xav tau cov roj hmab uas tiv taus cov tshuaj: Silicone roj hmab tiv taus ntau yam tshuaj, nrog rau cov roj, roj, thiab cov kua qaub. Qhov no ua rau nws yog qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas lwm cov roj hmab yuav puas.
-Thaum koj xav tau cov roj hmab uas muaj cov khoom siv hluav taws xob zoo: Silicone roj hmab yog ib qho zoo heev insulator thiab tuaj yeem siv rau hauv cov ntawv thov uas cov khoom siv hluav taws xob yuav tsum tau cais tawm ntawm ib leeg.
-Thaum koj xav tau cov roj hmab hloov tau yooj yim: Silicone roj hmab hloov tau ntau dua li lwm hom roj hmab, ua rau nws zoo tagnrho rau cov ntawv thov uas yuav tsum tau hloov pauv.
Thaum twg yog polyurethane qhov kev xaiv zoo tshaj?
Polyurethane roj hmab yog cov khoom siv ntau yam uas tuaj yeem siv rau ntau yam kev siv. Nws muaj zoo heev abrasion kuj, ua rau nws zoo tagnrho rau cov khoom uas yuav pom kev siv hnyav. Nws kuj muaj cov tshuaj tiv thaiv zoo, ua rau nws yog qhov kev xaiv zoo rau cov khoom uas yuav nkag mus rau hauv cov khoom siv phom sij. Polyurethane kuj yog ib qho zoo insulator, ua rau nws zoo tagnrho rau cov khoom uas xav tau kev tiv thaiv hluav taws xob.
Yuav ua li cas xaiv ntawm silicone roj hmab thiab polyurethane?
Qhov no yog ib lo lus nug uas tsis muaj lus teb yooj yim. Nws nyob ntawm daim ntawv thov thiab cov khoom tshwj xeeb xav tau. Nov yog qee cov lus qhia dav dav:
Yog tias qhov kub thiab txias yuav tsum tau ua, mus nrog silicone roj hmab. Nws tuaj yeem tiv taus kub txog 204 ° C (400 ° F). Polyurethane tuaj yeem tiv taus kub txog 93 ° C (200 ° F). Xws li kub hloov silicone roj hmab rollers.
Yog tias qhov ntsuas kub tsawg yog qhov tsim nyog, xaiv cov roj hmab silicone. Nws nyob twj ywm hloov mus rau -55 ° C (-67 ° F). Polyurethane ua tawv thiab nkig ntawm -40 ° C (-40 ° F).
Yog tias cov tshuaj tiv thaiv yog ib qho yuav tsum tau, dua, xaiv cov roj hmab silicone. Nws tuav tau zoo hauv cov roj, roj, roj av, thiab cov kua dej hydraulic. Polyurethane tsis zoo rau cov roj thiab roj, tab sis ua tau zoo nrog aliphatic hydrocarbons xws li roj av.
Polyurethane outperforms silicone roj hmab nyob rau hauv abrasion kuj, tsim kua muag zog, thiab tensile zog. Yog tias cov khoom no tseem ceeb, mus nrog polyurethane. Xws li: Anti-slip lev rau drilling platform, PU vibrating npo.
xaus
Los ntawm kev sib tham saum toj no, nws yog qhov tseeb tias silicone roj hmab muaj ntau yam zoo dua polyurethane. Silicone roj hmab yog hloov tau yooj yim, ruaj, thiab tuaj yeem tiv taus kub dua li polyurethane. Nws kuj muaj ntau yam kev siv thiab tuaj yeem hloov kho kom tau raws li cov kev xav tau tshwj xeeb. Txawm li cas los xij, silicone roj hmab yog kim dua polyurethane thiab tsis yooj yim kom tau txais.
