Lokacin zabar wani abu don samfurin ku na gaba, yana da mahimmanci a auna fa'ida da rashin amfanin kowane zaɓi. A cikin wannan shafin yanar gizon, za mu kwatanta shahararrun abubuwa biyu: silicone rubber da polyurethane.
Menene silicone rubber da polyurethane?
Silicone roba da polyurethane su ne nau'ikan elastomers guda biyu da ake amfani dasu. Dukansu kayan aiki ne masu ɗorewa waɗanda za a iya amfani da su don aikace-aikace iri-iri, amma akwai wasu bambance-bambance masu mahimmanci a tsakanin su.
Silicone roba robar roba ce da aka yi daga siliki, wani fili na siliki da oxygen, ma'ana yana da ikon komawa ga asalinsa bayan an miƙe shi ko an matsa shi. Silicone roba yana da abubuwa masu amfani da yawa, gami da juriya mai zafi, ƙarancin guba, da juriya ga yanayi da tsufa. Ana amfani da shi a aikace-aikace iri-iri, gami da hatimi, gaskets, rufin lantarki, da sassan mota.
Polyurethane wani roba ne na roba da aka yi daga polyurethane, wani fili na carbon, hydrogen, da oxygen, amma ba shi da sassauƙa kamar robar silicone. Har ila yau, Polyurethane yana da kaddarorin amfani masu yawa, ciki har da juriya mai girma da sassauci. Ana amfani da shi a cikin aikace-aikace iri-iri irin su kumfa mai sassauƙa, sutura, adhesives, da manne.
Menene bambance-bambance masu mahimmanci tsakanin silicone roba da polyurethane?
Lokacin zabar wani abu don samfurin ku, yana da mahimmanci a yi la'akari da halayen kowane zaɓi. Wannan gaskiya ne musamman lokacin yanke shawara tsakanin silicone roba da polyurethane. Ko da yake duka kayan biyu suna da kyakkyawan zaɓi don samfuran da yawa, suna da halaye daban-daban waɗanda zasu iya sa ɗayan ya fi dacewa da ɗayan.
Babban bambanci tsakanin silicone roba da polyurethane shine durometer, ko taurin. Silicone roba yana da fadi da kewayon taurin, daga mai laushi zuwa mai wuya. Wannan ya sa ya dace don samfuran da ke buƙatar zama mai laushi ko sassauƙa, kamar gaskets ko hatimi. Har ila yau, Polyurethane yana da nau'i mai yawa na taurin, amma mafi wuyar zaɓuɓɓukan sa sun fi wuya fiye da zaɓin siliki na roba. Wannan ya sa polyurethane ya fi dacewa da samfuran da ke buƙatar ƙarfi, kamar ƙafafu ko simintin ƙarfe.
Wani bambanci tsakanin silicone rubber da polyurethane shine tsarin warkewa. Ana warkar da robar silicone ta hanyoyi daban-daban, ciki har da zafi, vulcanization zafin ɗaki, da radiation. Polyurethane yana da mafi ƙarancin kewayon hanyoyin warkewa.
A ƙarshe, robar Silicone gabaɗaya ya fi juriya da zafi fiye da polyurethane, amma kuma ya fi tsada. Polyurethane, a gefe guda, ya fi sauƙi kuma yana da ƙananan yawa, yana sa shi sauƙi a nauyi.
Menene fa'idodin roba na silicone?
Rubber silicone yana da fa'idodi iri-iri wanda ya sa ya dace don amfani da shi a cikin masana'antu da aikace-aikace daban-daban. Ɗaya daga cikin fitattun fa'idodin roba na silicone shine juriya ga matsanancin yanayin zafi. Wannan yana nufin cewa ana iya amfani da shi a cikin yanayin zafi mai zafi ba tare da tsoron lalacewa ko lalacewa ba. Bugu da ƙari, roba na silicone kuma yana da matukar juriya ga sinadarai, yana mai da shi kyakkyawan abu don amfani a cikin yanayi inda akwai yuwuwar fallasa ga sinadarai masu tsauri.
Menene amfanin polyurethane?
Polyurethane abu ne mai ƙarfi, mai dorewa wanda za'a iya amfani dashi don aikace-aikace iri-iri. Yana da juriya ga tsagewa da abrasion, yana mai da shi kyakkyawan zaɓi don manyan kayan sawa kamar sassan mota, gears, da rollers. Polyurethane kuma ba shi da ruwa kuma yana da juriya ga harin sinadarai, yana mai da shi manufa don amfani da waje.
Tasirin muhalli: ta yaya suke shafar muhalli?
Ko da yake duka polyurethane da silicone rubber kayan aikin roba ne da aka kirkira ta hanyar polymerization, suna da kaddarorin daban-daban waɗanda ke sa kowannensu ya dace da takamaiman aikace-aikacen. Babban bambanci tsakanin su biyun shine polyurethane shine thermoset yayin da silicone roba shine thermoplastic. Wannan yana nufin cewa da zarar polyurethane ya warke, ba za a iya narkar da shi ba kuma a gyara shi kamar robar silicone. Wani maɓalli mai mahimmanci shine cewa polyurethane ya ƙunshi carbon yayin da silicone roba ba ya.
Lokacin da yazo da tasirin muhalli, duka kayan suna da ribobi da fursunoni. A gefe guda kuma, babu wanda ya ƙunshi sinadarai masu guba ko ƙarfe masu nauyi ta yadda za a iya zubar da su cikin aminci ba tare da cutar da muhalli ba. Duk da haka, saboda su duka kayan aikin roba ne da aka yi daga samfuran tushen man fetur, ba su da lalacewa kuma za su ci gaba da zama a cikin rumbun ƙasa na shekaru da yawa.
Yaushe ne roba silicone mafi kyaun zabi?
Akwai nau'ikan roba da yawa, kuma kowannensu yana da kaddarorin da suka sa ya fi dacewa da wasu aikace-aikace. Silicone roba yana daya daga cikin nau'ikan roba mafi yawan gaske, kuma yana da nau'ikan aikace-aikace. Anan akwai wasu yanayi lokacin da silicone roba shine mafi kyawun zaɓi:
-Lokacin da kuke buƙatar roba mai iyawa jure matsanancin yanayin zafi: Silicone roba na iya jure yanayin zafi daga -55 ° C zuwa + 300 ° C, yana sa ya dace don aikace-aikace inda sauran rubbers zasu kasa.
-Lokacin da ake buƙatar roba mai juriya ga sinadarai: Silicone robar yana jure wa sinadarai daban-daban, ciki har da mai, mai, da acid. Wannan ya sa ya zama kyakkyawan zaɓi don aikace-aikace inda sauran rubbers za su lalace.
-Lokacin da kake buƙatar robar da ke da kyawawan kaddarorin wutar lantarki: Silicone rubber shine insulator mai kyau kuma ana iya amfani dashi a aikace-aikace inda kayan lantarki ke buƙatar ware su daga juna.
-Lokacin da kuke buƙatar roba mai sassauƙa: Silicone roba ya fi sauƙi fiye da sauran nau'ikan rubbers, yana sa ya dace don aikace-aikacen da ake buƙatar sassauci.
Yaushe polyurethane shine mafi kyawun zabi?
Polyurethane roba abu ne mai mahimmanci wanda za'a iya amfani dashi a aikace-aikace iri-iri. Yana da kyakkyawan juriya abrasion, yana sa ya dace da samfuran da za su ga amfani mai nauyi. Hakanan yana da kyakkyawan juriya na sinadarai, yana mai da shi kyakkyawan zaɓi don samfuran da zasu haɗu da abubuwa masu haɗari. Polyurethane kuma yana da insulator mai kyau, yana sa ya dace da samfuran da ke buƙatar kariya daga haɗarin lantarki.
Yadda za a zabi tsakanin silicone roba da polyurethane?
Wannan tambaya ce gama gari ba tare da amsa mai sauƙi ba. Ya dogara da aikace-aikacen da takamaiman kaddarorin da ake buƙata. Ga wasu jagororin gabaɗaya:
Idan ana buƙatar juriya mai zafi, tafi tare da robar silicone. Yana iya jure yanayin zafi har zuwa 204°C (400°F). Polyurethane na iya jure yanayin zafi har zuwa 93°C (200°F). Kamar canja wurin zafi na siliki roba rollers.
Idan ƙarancin zafin jiki ya zama dole, zaɓi roba silicone. Yana kasancewa mai sassauƙa har zuwa -55°C (-67°F). Polyurethane ya zama mai tauri kuma ya lalace a -40°C (-40°F).
Idan juriya na sinadarai ya zama dole, kuma, ɗauki robar silicone. Yana da kyau a cikin mai, mai, man fetur, da ruwa mai ruwa. Polyurethane yana da ƙarancin juriya ga mai da maiko amma yana da kyau tare da hydrocarbons aliphatic kamar man fetur.
Polyurethane ya fi ƙarfin roba na silicone a cikin juriya na abrasion, ƙarfin hawaye, da ƙarfin ɗaure. Idan waɗannan kaddarorin suna da mahimmanci, tafi tare da polyurethane. Kamar su: Anti-slip mat for hakowa dandamali, PU vibrating allon.
Kammalawa
Daga tattaunawar da ke sama, ya bayyana a fili cewa roba na silicone yana da fa'idodi da yawa akan polyurethane. Silicone roba ya fi sassauƙa, mai ɗorewa, kuma yana iya jure yanayin zafi fiye da polyurethane. Hakanan yana da fa'idar amfani iri-iri kuma ana iya keɓance shi don biyan takamaiman buƙatu. Duk da haka, roba silicone ya fi polyurethane tsada kuma ba shi da sauƙi a samu.
