Tam sim no, cov khoom siv hauv cov kav dej siv hauv tsheb tuaj yeem muab faib ua peb pawg: cov yeeb nkab nylon, cov yeeb nkab roj hmab thiab cov yeeb nkab hlau.Feem ntau siv nylon raj yog PA6, PA11 thiab PA12.Peb cov ntaub ntawv no suav nrog hu ua aliphatic Pa. PA6 thiab PA12 yog lub nplhaib qhib polymerization thiab PA11 yog condensation polymerization.
1. Qhov zoo ntawmnylon cevyog raws li nram no: ▼ roj kuj zoo heev (roj av, diesel), lubricating roj thiab roj, thiab tshuaj tiv thaiv.▼ Tsis tshua muaj kub cuam tshuam tsis kam: PA11 tuaj yeem tiv taus qhov kub thiab txias ntawm - 50 ℃ thiab PA12 tuaj yeem tiv taus qhov kub thiab txias ntawm - 40 ℃.▼ dav daim ntawv thov kub ntau: daim ntawv thov kub ntau ntawm PA11 yog - 40 ~ 125 ℃, thiab txoj hauj lwm ntawm PA12 yog - 40 ~ 105 ℃.Tom qab kev laus ntsuas ntawm 125 ℃, 1000h, 150 ℃ thiab 16h, PA11 yeeb nkab muaj qhov ua tau zoo ntawm qhov kub thiab txias.▼ tsis kam rau oxygen thiab zinc ntsev corrosion: tsis kam mus rau 50% zinc chloride tov rau ntau tshaj 200H.▼ tiv taus roj teeb acid thiab ozone.▼ nws yog cov khoom siv lubricating tus kheej nrog kev vibration tsis kam, hnav tsis kam, qaug zog ua haujlwm thiab tsis muaj kev sib txhuam coefficient.▼ UV tsis kam thiab atmospheric aging: UV kuj ntawm ntuj xim PA11 tuaj yeem siv rau 2.3-7.6 xyoo nyob ntawm thaj tsam sib txawv;Lub peev xwm los tiv thaiv ultraviolet dub PA11 nce plaub zaug tom qab ntxiv cov tshuaj tiv thaiv ultraviolet absorbent.
Cov txheej txheem ntawm cov yeeb nkab nylon yog: ① txheej txheem extrusion ② txheej txheem txheej txheem ③ txheej txheem sib dhos ④ txheej txheem nrhiav kom pom.Feem ntau,nylon cevmuaj cov txiaj ntsig zoo hauv kev ua tau zoo piv nrog cov yeeb nkab hlau, thaum nws zoo dua hauv cov tshuaj corrosion kuj thiab hnav tsis kam piv nrogstainless hlau yeeb nkab, uas ua lub luag haujlwm zoo hauv kev txo cov tsheb hnyav thiab cov nqi tsim khoom.
2. Muaj ntau ntauroj hmab hosecov qauv tsim rau tsheb, thiab cov qauv tsim muaj xws li hom zoo tib yam, hom siv zog ntxiv thiab hom coated.
Cov qauv ntawm cov roj hmab hose tam sim no, cov khoom siv roj hmab siv ntau tshaj plaws hauv kev ua lag luam yog FKM, NBR, Cr, CSM thiab eco: ▼ qhov kev pabcuam kub ntawm FKM (fluororubber) yog 20 ~ 250 ℃, uas yog siv rau O- nplhaib, roj foob, puab txheej ntawmroj hosethiab lwm yam khoom sealing.▼ qhov kev pabcuam kub ntawm NBR (nitrile roj hmab) yog 30 ~ 100 ℃, uas yog siv rau roj hmab hose, sealing nplhaib thiab roj foob.▼ qhov kev pabcuam kub ntawm Cr (chloroprene roj hmab) yog 45 ~ 100 ℃, uas yog tsuas yog siv rau daim kab xev, hose, hlau txheej, roj hmab phaj gasket 'plua plav cover, thiab lwm yam. ▼ qhov kev pab kub ntawm CSM (chlorosulfonated polyethylene roj hmab) yog 20 ~ 120 ℃, uas yog tsuas yog siv rau cov log tsheb, daim kab xev, lub txim plug sheath, xov hlau, hluav taws xob qhov chaw, O-rings, lub qhov rooj thiab qhov rais sealing strips, thiab lwm yam. ▼ qhov kev pab kub ntawm eco (Chloroether roj hmab) yog 40 ~ 140 ℃, uas yog tsuas yog siv rau kub nplhaib, diaphragm, poob siab ncoo, roj hmab hose, thiab lwm yam.
3. Raws li ib yam ntawm cov yeeb nkab nyuaj,cev hlaumuaj qhov zoo ntawm qhov hnyav hnyav, tus nqi siab thiab kev tawg yooj yim.Yog li ntawd, ntau thiab ntau lub tuam txhab tsheb xaiv tso tseg kev siv cov yeeb nkab hlau.Tam sim no, hlau txhuas yeeb nkab yog tsim rau cua txias system.Txawm li cas los xij, lub zog tensile, bursting siab thiab aging kuj ntawm cov kav hlau yog zoo dua li cov nylon kav thiab cov kav dej roj hmab.
Post lub sij hawm: May-24-2022