Cov ntsiab lus ceev
Cov ntau yam:Epdm hardness feem ntau yog ntog ntawm40 thiab 90 ntug dej a.
Feem ntau ntau ntau ntau: 50 rau 80 ntug dej anpog feem ntau ntawm cov ntawv thov.
Kev Ntsuas Ntsuas:Ntsuas nrog aNtug dej Durometer.
EPDM Hardness Nplai Thiab Cov Ntawv Thov
Cov lus hauv qab no qhia txog cov kev siv nyuaj heev thiab lawv cov kev siv:
| Ntug dej hardness | Xav / Sib Piv | Cov Kev Siv EPDM UPDM |
|---|---|---|
| 40 - 50 A | Mos, zoo li tus cwj mem xaum | Cov mos mos weatherstripping, tsawg {{{0} hish chonge gaskets, cushioning pads. |
| 50 - 60 A | Nruab nrab - muag muag, zoo li lub tsheb log tsuj | Feem ntau rau cov ntsaws ruaj ruaj thiab gaskets.Automotive Qhov Rooj Ntsaws Ruaj Ruaj, Qhov Rais Ntsaws Ruaj Ruaj, General - hom phiaj zoo li gaskets. |
| 60 - 70 A | Nruab nrab - ruaj, zoo li lub laub taj laj lub log log | Cov haujlwm ua haujlwm.Radiator HOSES, Siv tau siv npog, ntau o {{{rings, Industrial Ntsaws. |
| 70 - 80 A | Ruaj, zoo li lub kaus mom nyuaj | High -} cov pa, yob npog, hnav ib daim nyias nyias, lub tsev vov tsev (firmer xav). |
| 80 - 90 A | Ruaj khov heev, zoo li kev ua si hocey | High -} abr្ abr abr abr abr abr application, cov log tsheb tawv, xav tau cov khoom lag luam khoom siv. |
Cov lus qhia ntxaws ntxaws
1. Dab tsi yog hardness (ntug dej a)?
Hardness yog kev ntsuas ntawm cov khoom siv tiv thaiv mus rau saum npoo indentation. IbTuab DUROMETERCov ntsuas cua nias ib qho ntsuas hluav taws xob ntsuas rau hauv cov qauv roj hmab, thiab cov kev tawm tsam yog tshwm rau ntawm ntug dej nplai. Ib tus lej ntau dua qhia tau cov khoom nyuaj.
2. Qhov xwm txheej uas txiav txim siab epdm hardness
Lub hardness ntawm ib qho tshwj xeeb epdm tsis tau txais rau lub hauv paus polymer; Nws yog txiav txim siab los ntawm daim ntawv qhia sib xyaw:
Fillers:Nov yog thawj qhov tseem ceeb.
Carbon Dub:Feem ntau kev txhawb nqa kev muab rau. Ua kom muaj cov pa roj carbon dub ua rau EPDM Harder Harder, muaj zog dua, thiab muaj kev puas tsuaj ntxiv}} tiv taus.
Pob zeb cov pob zeb:(piv txwv li, av nplaum, TALC) tau siv los txuas ntxiv cov compound thiab tuaj yeem nce hardness.
Yas hli:Cov no yog cov roj ntxiv los ua kom cov compoundsofterthiab hloov tau yooj yim dua. Lub tshuab hluav taws xob siab cov ntsiab lus ua tau nyob hauv qis qis ntawm lub siab tawv.
Tsev Kho Mob:Hom thiab tus nqi ntawm Curatives tuaj yeem cuam tshuam me ntsis hardness thiab txhav txhav ntawm polymer network.
Hom Polymer:Lub ethylene / propylene piv tau cuam tshuam hardness. Siab - Ethylene Epdm nyhav yuav nyuaj dua thiab muaj ntau crystalline.
3. Vim li cas hardness tseem ceeb
Xaiv lub hardness yog yog qhov sib npaug ntawm kev sib tw yuav tsum muaj:
Softer EPDM (piv txwv li, 50-60 a):
Pros:Muaj peev xwm muaj peev xwm sib haum los sib foob ntawm cov chaw tsis tu ncua lossis ntxhib, kev yoog tau ntau dua, nqus tau zoo dua.
Cons:Txo kev siv zog dua, siab dua rau kev muab extrude nyob rau hauv kev kub siab, tsawg dua kev puas tsuaj {{tsis kam.
Nyuaj EPDM (piv txwv li, 70-80 a):
Pros:Siab dua ua tsis kam, zoo dua tsis kam mus rau extrusion, txhim kho lub cev lub zog.
Cons:Yuav tsis muab ntim rau ntawm cov ntxhib cov chaw, yuav tsum muaj ntau dua kev quab yuam, tuaj yeem hloov tau yooj yim ntawm qhov kub tsawg.
Yuav ua li cas xaiv txoj kev nyuaj
Rau cov ntsaws ruaj ruaj / gaskets(piv txwv li, qhov rooj ntsaws, flanges):Softer Cov Khaub Ncaws (50-70 A)Feem ntau nyiam vim tias lawv tuaj yeem hloov tau yooj yim los sau cov khoob thiab ua raws li kev ua tsis tiav.
Rau Dynamic Ntim(piv txwv li, wipers, ntsaws ruaj ruaj rau kev tsiv safts):HARDER LAWV (70-80 A)zoo dua vim tias lawv tawm tsam thiab kev puas tsuaj thiab tsis tshua muaj kev sib tw lossis extrude.
Rau hoses thiab cov menyuam no: A Nruab Nrab Hardness (60-70 A)Yog muaj ntau, muab kev sib npaug zoo ntawm kev yoog tau, zuaj tsis kam, thiab kav ntev.
Rau lub roof miurranes:Feem ntau ntawmfirmer sab (50-80 a, feem ntau nyob ib ncig ntawm 60-70 a)Txhawm rau muab cov durability, kev sib tw tiv taus, thiab seem ruaj khov.
Piv nrog lwm cov ntaub ntawv
| Khoom | Lub hardness loj (ntug dej a) | Tej xwm ib ncig |
|---|---|---|
| Silicone Roj Hmab | 20 - 80 A | Yuav ua tau softer ntau dua epdm. |
| Nitrile (NBR) | 40 - 90 A | Zoo sib xws rau epdm. |
| TSHEB TOG TEAD | ~60 - 70 A | Muab cov ntaub ntawv zoo rau qhov nruab nrab "nruab nrab" hardness. |
| Hard mom | ~75 A | Muab cov khoom siv zoo rau "cov roj hmab nyuaj" roj hmab / yas. |
Tag
Tsis muaj ib qho "zoo tshaj plaws" Hardness rau epdm. Tus nqi zoo tagnrho nyob ntawm daim ntawv thov cov cai rauSealing Force, siab tsis kam, puas tsis kam, thiab yooj.
Nco ntsoov saib cov ntaub ntawv cov ntaub ntawv (TDS)Los ntawm cov chaw tsim khoom lossis cov chaw xa khoom rau qhov ua tau nyuaj thiab lwm yam khoom ntawm qhov tshwj xeeb epdm compound koj tab tom xav txog.
