TOP 5 Elastomers Don Gasket & Hatimin Aikace-aikace
Menene elastomers? Kalmar ta samo asali daga "na roba" - ɗaya daga cikin mahimman kaddarorin roba. Ana amfani da kalmomin "rubber" da "elastomer" tare da juna don komawa ga polymers tare da viscoelasticity-wanda aka fi sani da "elasticity." Abubuwan da ke cikin abubuwan da ke tattare da elastomers sun haɗa da sassauƙa, haɓakar haɓakawa da haɗuwa da haɓakawa da damping (damping dukiya ce ta roba wanda ke sa ta canza makamashin injin zuwa zafi lokacin da aka karkatar da shi). Wannan keɓaɓɓen saitin kaddarorin yana sa elastomers ya zama kyakkyawan abu don gaskets, like, isolat ors, da makamantansu.
A cikin shekaru da yawa, samar da elastomer ya yi ƙaura daga roba na halitta wanda aka samar daga latex na bishiya zuwa bambance-bambancen haɗin roba na injina sosai. A cikin ƙirƙirar waɗannan bambance-bambancen, ana samun takamaiman kaddarorin tare da taimakon abubuwan ƙarawa kamar masu filaye ko masu filastik ko ta bambancin ma'aunin abun ciki a cikin tsarin copolymer. Juyin halittar elastomer yana haifar da ɗimbin damammakin elastomer waɗanda za'a iya ƙirƙira, ƙera su kuma samar dasu a cikin kasuwa.
Domin zaɓar kayan da ya dace, yakamata mutum ya fara bincika ƙa'idodin gama gari don aikin elastomer a cikin gasket da aikace-aikacen hatimi. Lokacin zabar wani abu mai inganci, injiniyoyi za su yi la'akari da abubuwa da yawa. Yanayin sabis kamar kewayon zafin aiki, yanayin muhalli, hulɗar sinadarai, da buƙatun inji ko na zahiri duk suna buƙatar yin la'akari da su a hankali. Dangane da aikace-aikacen, waɗannan yanayin sabis na iya tasiri sosai ga aiki da tsammanin rayuwa na gasket ko hatimi na elastomer.
Tare da waɗannan ra'ayoyin, bari mu bincika biyar daga cikin elastomer da aka fi ɗauka don aikace-aikacen gasket da hatimi.
1)Buna-N/Nitrile/NBR
Dukkanin kalmomi masu ma'ana, wannan roba copolymer na acrylonitrile (ACN) da butadiene, ko Nitrile butadiene rubber (NBR), wani zaɓi ne sananne wanda galibi ana bayyana shi lokacin da man fetur, mai da/ko greases suke.
Babban Properties:
Matsakaicin Yanayin Zazzabi daga ~ -54°C zuwa 121°C (-65° – 250°F).
Kyakkyawan juriya ga mai, kaushi da mai.
Kyakkyawan juriya na abrasion, ruwan sanyi, juriya na hawaye.
An fi so don aikace-aikace tare da Nitrogen ko Helium.
Rashin juriya ga UV, ozone, da yanayin yanayi.
Rashin juriya ga ketones da chlorinated hydrocarbons.
Mafi yawan amfani a:
Aerospace & Automotive Man Fetur Aikace-aikace
Farashin dangi:
Ƙananan zuwa Matsakaici
2) EPDM
Abun da ke ciki na EPDM yana farawa tare da copolymerization na ethylene da propylene. An ƙara monomer na uku, diene, don a iya lalata kayan da sulfur. Ginin da aka samar an san shi da ethylene propylene diene monomer (EPDM).
Babban Properties:
Matsakaicin Yanayin Zazzabi daga ~ -59°C zuwa 149°C (-75° – 300°F).
Kyakkyawan zafi, ozone da juriya na yanayi.
Kyakkyawan juriya ga abubuwan polar da tururi.
Kyawawan kaddarorin rufewar lantarki.
Kyakkyawan juriya ga ketones, talakawa diluted acid, da alkalines.
Rashin juriya ga mai, fetur, da kananzir.
Rashin juriya ga aliphatic hydrocarbons, halogenated kaushi, da kuma tattara acid.
Mafi Yawanci Aiki A:
Wuraren Firiji/Cikin Sanyi
Tsarin Sanyaya Mota da Aikace-aikacen Sauke Yanayi
Farashin dangi:
Ƙananan - Matsakaici
3) Neoprene
Iyalin neoprene na roba roba an samar da su ta hanyar polymerization na chloroprene kuma an san shi da polychloroprene ko Chloroprene (CR).
Babban Properties:
Matsakaicin Yanayin Zazzabi daga ~ -57°C zuwa 138°C (-70° – 280°F).
Kyakkyawan tasiri, abrasion da kaddarorin juriya na harshen wuta.
Kyakkyawan juriya da matsawa saitin.
Kyakkyawan juriya na ruwa.
Kyakkyawan juriya ga matsakaicin bayyanar sararin samaniya, UV, da yanayin yanayi haka ma mai, mai, da ƙaushi mai laushi.
Rashin juriya ga ƙarfi acid, kaushi, esters, da ketones.
Rashin juriya ga chlorinated, aromatic, da nitro-hydrocarbons.
Mafi Yawanci Aiki A:
Aikace-aikacen Muhalli na Ruwa
Lantarki
Farashin dangi:
Ƙananan
4) Siliki
Silicone rubbers sune manyan-polymer vinyl methyl polysiloxanes, wanda aka tsara a matsayin (VMQ), waɗanda ke yin aiki sosai a cikin ƙalubale na yanayin zafi. Saboda tsaftarsu, robar silicone sun dace musamman don aikace-aikacen tsabta.
Babban Properties:
Matsakaicin Yanayin Zazzabi daga ~ -100°C zuwa 250°C (-148° – 482°F).
Kyakkyawan juriya mai zafi.
Fitaccen UV, ozone da juriya na yanayi.
Yana nuna mafi kyawun sassaucin ƙananan zafin jiki na kayan da aka jera.
Kyakkyawan dielectric Properties.
Rashin ƙarancin ƙarfi da juriya na hawaye.
Rashin juriya ga kaushi, mai, da ma'aunin acid.
Rashin juriya ga tururi.
Mafi Yawanci Aiki A:
Aikace-aikacen Abinci & Abin Sha
Aikace-aikacen Muhalli na Magunguna (Sai dai haifuwar tururi)
Farashin dangi:
Matsakaici - High
5) Fluoroelastomer/Viton®
Viton® fluoroelastomers an rarraba su a ƙarƙashin nadi FKM. Wannan aji na elastomers iyali ne wanda ya ƙunshi copolymers na hexafluoropropylene (HFP) da vinylidene fluoride (VDF ko VF2).
Terpolymers na tetrafluoroethylene (TFE), vinylidene fluoride (VDF) da hexafluoropropylene (HFP) da kuma perfluoromethylvinylether (PMVE) dauke da fannoni ana lura da su a manyan maki.
FKM an san shi azaman maganin zaɓi lokacin da ake buƙatar babban zafin jiki da juriya na sinadarai.
Babban Properties:
Matsakaicin Yanayin Zazzabi daga ~ -30°C zuwa 315°C (-20° – 600°F).
Mafi kyawun juriya na zafin jiki.
Fitaccen UV, ozone da juriya na yanayi.
Rashin ƙarancin juriya ga ketones, ƙananan nauyin kwayoyin esters.
Rashin juriya ga barasa da abubuwan da ke ɗauke da nitro
Rashin juriya ga ƙananan zafin jiki.
Mafi Yawanci Aiki A:
Aikace-aikacen Rufin Ruwa / SCUBA
Aikace-aikacen Man Fetur na Mota tare da Babban Mahimmanci na Biodiesel
Aikace-aikacen Hatimin Jirgin Sama a cikin Tallafin Man Fetur, Mai mai, da Tsarin Ruwa
Farashin dangi:
Babban
Lokacin aikawa: Afrilu-15-2020