TOP 5 Elastomers ee Gasket & Codsiyada Seal
Waa maxay Elastomers?Eraygu wuxuu ka yimid "elastic"-mid ka mid ah sifooyinka aasaasiga ah ee caag.Erayada "caag" iyo "elastomer" ayaa si is beddel ah loo isticmaalaa si loo tixraaco polymers leh viscoelasticity-badanaa loo yaqaan "elasticity."Astaamaha dabiiciga ah ee elastomers waxaa ka mid ah dabacsanaan, dheerayn sare iyo isku darka adkeysiga iyo qoyaanka ( qoyaanku waa hanti caag ah taas oo keenta inay u beddesho tamarta farsamada kuleylka marka la leexiyo).Qalabkan gaarka ah wuxuu ka dhigayaa elastomers wax ku habboon gaasaska, shaabadihii, go'doominta iyo wixii la mid ah.
Sanadihii la soo dhaafay, wax soo saarka elastomer waxa uu ka guuray caag dabiici ah oo ka soo baxay cinjirka geedka una gudbay kala duwanaanshiyaha isku dhafka caag aad loo farsameeyay.Marka la abuurayo kala duwanaanshiyahan, sifooyin gaar ah ayaa lagu helaa iyadoo la kaashanayo waxyaabaha lagu daro sida kuwa buuxinaya ama balaastiga ama iyadoo lagu kala duwanaanayo saamiga nuxurka ee qaab dhismeedka koobiyeerka.Kobcinta wax soo saarka elastomer-ka waxa ay abuurtaa fursado badan oo elastomer ah kuwaas oo la farsamayn karo, la soo saari karo lagana dhigi karo gudaha suuqa.
Si loo doorto walxaha saxda ah, waa in marka hore la baaro shuruudaha caadiga ah ee waxqabadka elastomer ee gaasaska iyo codsiyada shaabadda.Marka la dooranayo shay wax ku ool ah, injineeradu inta badan waa inay tixgeliyaan arrimo badan.Xaaladaha adeegga sida kala duwanaanta heerkulka hawlgalka, xaaladaha deegaanka, xidhiidhka kiimikaad, iyo shuruudaha makaanikada ama jirka dhamaantood waxay u baahan yihiin in si taxadar leh loo tixgeliyo.Iyada oo ku xidhan codsiga, xaaladahan adeeg waxay si weyn u saameyn karaan waxqabadka iyo rajada nolosha ee gaaska elastomer ama shaabad.
Iyadoo fikradahan maskaxda lagu hayo, aynu eegno shan ka mid ah elastomer-yada inta badan loo shaqeeyo ee gaasaska iyo codsiyada shaabadda.
1)Buna-N/Nitrile/NBR
Dhammaan ereyada isku midka ah, copolymer-ka caagga ah ee acrylonitrile (ACN) iyo butadiene, ama Nitrile butadiene rubber (NBR), waa doorasho caan ah oo inta badan la cayimo marka shidaal, saliid iyo/ama dufan ay jiraan.
Guryaha Muhiimka ah:
Heerkulka ugu badan ee u dhexeeya ~ -54°C ilaa 121°C (-65° – 250°F).
Iska caabbinta aadka u wanaagsan ee saliidaha, dareeraha iyo shidaalka.
Iska caabbinta naaxinta wanaagsan, socodka qabow, iska caabinta ilmada.
Loo door biday codsiyada Nitrojiin ama Helium.
Iska caabbinta liidata ee UV, ozone, iyo cimilada.
Iska caabbinta liidata ee ketones iyo hydrocarbons koloriinaysan.
Inta badan waxaa laga isticmaalaa:
Aerospace & Codsiyada Xakamaynta Shidaalka Baabuurta
Qiimaha Qaraabada:
Hooseeyo ilaa Dhexdhexaad
2)EPDM
Halabuurka EPDM wuxuu ka bilaabmaa kopolymerization ee ethylene iyo propylene.Midka saddexaad ee monomer, diene, ayaa lagu daraa si ay walaxda u nuglaato baaruud.Xarunta la soo saaray waxaa loo yaqaan ethylene propylene diene monomer (EPDM).
Guryaha Muhiimka ah:
Heerkulka ugu badan ee u dhexeeya ~ -59°C ilaa 149°C (-75° – 300°F).
Kulayl aad u fiican, ozone iyo caabbinta cimilada.
Iska caabbinta wanaagsan ee walxaha polar iyo uumiga.
Guryaha dahaarka koronto ee heer sare ah.
Iska caabbinta wanaagsan ee ketones, asiidhyada caadiga ah ee la qasi jiray, iyo alkalines.
Iska caabbinta liidata ee saliidaha, shidaalka, iyo kerosene
Iska caabbinta liidata ee hydrocarbons aliphatic, dareerayaasha halogenated, iyo asiidhyada uruursan.
Inta badan waxaa laga isticmaalaa gudaha:
Deegaanka Qaboojiye/Qol- Qabow
Nidaamka qaboojinta Gawaarida iyo Codsiyada Ka-jaridda Cimilada
Qiimaha Qaraabada:
Hooseeyo - Dhexdhexaad
3) Neoprene
Qoyska neoprene ee caag synthetic waxaa soo saaray polymerization of chloroprene oo sidoo kale loo yaqaan polychloroprene ama Chloroprene (CR).
Guryaha Muhiimka ah:
Heerkulka ugu badan ee u dhexeeya ~ -57°C ilaa 138°C (-70° – 280°F).
Saamayn heer sare ah, naaxinta iyo guryaha u adkaysta ololka.
U adkaysiga ilmada oo wanaagsan
Biyo iska caabin heer sare ah.
Iska caabbinta dhexdhexaadka ah ee soo-gaadhista ozone, UV, iyo cimilada iyo sidoo kale saliidaha, dufanka, iyo dareerayaasha khafiifka ah.
Iska caabbinta liidata ee asiidhyada adag, dareerayaasha, esters, iyo ketones.
Iska caabbinta liidata ee chlorinated, udugga, iyo nitro-hydrocarbons.
Inta badan waxaa laga isticmaalaa gudaha:
Codsiyada Deegaanka Biyaha
Electronic
Qiimaha Qaraabada:
Hoose
4) Silikoon
Cinjirrada silikoonku waa polysilloxanes vinyl methyl polysiloxanes-polymer-sare ah, oo loo qoondeeyay sida (VMQ), kuwaas oo si aad u wanaagsan uga shaqeeya jawi kuleyl ah oo adag.Nadiifintooda awgeed, caagadaha silikoonka ayaa si gaar ah ugu habboon codsiyada nadaafadda.
Guryaha Muhiimka ah:
Heerkulka ugu badan ee u dhexeeya ~ -100°C ilaa 250°C (-148° – 482°F).
Iska caabin heerkul sare oo heer sare ah.
UV heer sare ah, ozone iyo caabbinta cimilada.
Wuxuu muujiyaa dabacsanaanta heerkulka hooseeya ee ugu fiican ee agabyada liiska ku jira.
Sifooyin koronto oo aad u wanaagsan.
Xoog adkaysi liidata iyo iska caabbinta ilmada.
Iska caabbinta liidata ee dareerayaasha, saliidaha, iyo asiidhka.
Iska caabbinta liidata ee uumiga.
Inta badan waxaa laga isticmaalaa gudaha:
Codsiyada Cuntada & Cabitaanka
Codsiyada Deegaanka Dawooyinka (marka laga reebo jeermiska uumiga)
Qiimaha Qaraabada:
Dhexdhexaad - Sare
5) Fluoroelastomer/Viton®
Viton® fluoroelastomers waxaa loo kala saaray magaca FKM.Fasalkan elastomers waa qoys ka kooban copolymers hexafluoropropylene (HFP) iyo fluoride vinylidene (VDF ama VF2).
Terpolymers ee tetrafluoroethylene (TFE), vinylidene fluoride (VDF) iyo hexafluoropropylene (HFP) iyo sidoo kale perfluoromethylvinylether (PMVE) oo ka kooban takhasusyo ayaa lagu arkay darajooyin sare.
FKM waxaa loo yaqaanaa xalka doorashada marka heerkulka sare iyo sidoo kale iska caabbinta kiimikada loo baahan yahay.
Guryaha Muhiimka ah:
Heerkulka ugu badan ee u dhexeeya ~ -30°C ilaa 315°C (-20° – 600°F).
Iska caabbinta heerkulka sare ee ugu fiican.
UV heer sare ah, ozone iyo caabbinta cimilada.
Iska caabbinta liidata ee ketones, ester-ka miisaanka unugyadu hooseeyo.
Iska caabin liidata aalkolada iyo xeryahooda nitro-ku jira
Iska caabbinta liidata heerkulka hooseeya.
Inta badan waxaa laga isticmaalaa gudaha:
Codsiyada Xiritaanka Biyaha/SCUBA
Codsiyada Shidaalka Gawaarida oo leh Waxyaalaha Sare ee Biyodiesel
Codsiyada Seal Aerospace ee Taageerada Shidaalka, Saliida, iyo Nidaamyada Haydarooliga
Qiimaha Qaraabada:
Sare
Waqtiga boostada: Abriil-15-2020