Nkag siab iav Hloov Kub Kub (Tg) rau Roj Hmab Seals

 

Zoo siab txais tos rau peb -ib feem ntawm kev ua haujlwm ntawm Cov Roj Hmab Kub Kub Ua Haujlwm rau cov ntawv thov kev sib khi. Cov koob no yog sau tshwj xeeb rau kev yuav cov engineers, sealing design engineers, thiab technical professionals ua hauj lwm nrog railway braking systems, pneumatic tswj li qub, thiab hlau -bonded valve cores.

 

 

 

 

 

Hauv cov tshuab braking, pneumatic tswj li qub, thiab cov hlau sib txuas valve cores, cov khoom siv roj hmab yuav tsum muaj kev ruaj ntseg sealing kev ua tau zoo nyob rau hauv ntau yam ntawm ib puag ncig. Lub caij ntuj no ua haujlwm nyob rau sab qaum teb Europe tuaj yeem nthuav tawm cov khoom sib khi rau qhov kub thiab txias hauv qab -30 degree, ua haujlwm kub qis yog ib qho tseem ceeb tshaj plaws ntawm cov khoom siv xaiv.

 

Ntau tus engineers tsom rau hardness lossis tensile lub zog thaum sib piv elastomers. Txawm li cas los xij, rau qis- cov ntawv siv kub, cov ntsuas xws li iav Hloov Kub Kub (Tg), TR10, thiab Kub Kub Siab Brittleness muab cov ntaub ntawv muaj txiaj ntsig ntau dua. Kab lus no tsom tshwj xeeb rau Tg thiab nws qhov tseem ceeb engineering rau kev sib khi daim ntawv thov.

 

 

Roj hmab yog elastic vim nws cov saw hlau polymer tuaj yeem txav tau yooj yim. Raws li qhov kub thiab txias, molecular txav qeeb. Thaum cov khoom mus txog nws cov iav hloov pauv cheeb tsam, cov roj hmab maj mam poob elasticity thiab ua nruj. Raws li qhov kub thiab txias tseem poob qis, cov khoom siv yuav ua rau tawg txaus los ntawm kev cuam tshuam lossis deformation.

 

Rau lub valve cores siv nyob rau hauv railway pneumatic systems, qhov poob ntawm elasticity yuav ncaj qha txo qhov kev cia siab ntawm sealing thiab nce nqi txij nkawm. Nkag siab Tg yog thawj kauj ruam hauv kev kwv yees tus cwj pwm no.

 

 

Iav Transition Temperature yog qhov kub ntawm cov roj hmab hloov pauv los ntawm kev hloov pauv, roj hmab-zoo li lub xeev mus rau qhov khov, iav-zoo li lub xeev. Qhov no yog ib qho tseem ceeb ntawm cov khoom siv polymer uas piav txog cov molecular - hloov pauv hauv cov khoom.

 

• Elastic rov qab txo qis heev.
• Compression sealing kev ua tau zoo deteriorates.
• Dynamic txav yuav nyuaj.
• Crack kuj raug txo.

Cov khoom siv roj hmab	Yam Tg
NBR	-25℃rau -40 degree
HNBR	-30℃rau -45 degree
EPDM	-50℃rau -60 degree
FKM	-10℃rau -20 degree
TGE Optimized Tsawg-Tub NBR	qis dua -60 degree

 

 

Tg muab cov ntaub ntawv tseem ceeb txog kev coj tus cwj pwm molecular, tab sis nws yuav tsum tsis txhob siv ib leeg thaum ntsuas kev sib khi. Thaum Tg qhia txog thaj tsam qhov kub thiab txias qhov chaw nruj heev, qhov tseeb sealing kev ua tau zoo nyob ntawm cov khoom ntxiv nrog rau kev muaj peev xwm rov qab los ntawm deformation.

 

Qhov qis Tg feem ntau txhais tau hais tias cov roj hmab tseem hloov tau ntawm qhov txias dua. Txawm li cas los xij, nws tseem ceeb heev uas yuav tsum nco ntsoov tias kev sib xyaw ua ke ua lub luag haujlwm tseem ceeb dua li tsev neeg polymer ib leeg. Los ntawm kev xaiv polymer, optimized plasticizer systems, thiab ua tib zoo tswj kev kho tshuab, cov khoom siv zoo tshaj plaws tuaj yeem ua tiav cov txiaj ntsig Tg qis dua li cov qauv tsim.

 

 

Thaum sib piv cov roj hmab sib xyaw rau qis - daim ntawv thov kub, xav nug cov neeg muag khoom:

• Qhov ntsuas Tg tus nqi ntawm cov ntsiab lus tshwj xeeb yog dab tsi (tsis yog cov ntaub ntawv polymer nkaus xwb)?
• Tus qauv xeem twg siv los txiav txim Tg (DSC, DMA, thiab lwm yam)?
• Tg hloov li cas tom qab kev laus thaum tshav kub kub thiab dej raug?
• Dab tsi yog qhov kev sib raug zoo ntawm Tg thiab kev sib khi tiag tiag hauv koj daim ntawv thov?

 

 

Ntau tus engineers xav tias NBR tsis haum rau qhov kub hauv qab -30 degree. Qhov tseeb tiag, peb pab neeg engineering tau tsim tshwj xeeb qis -kub NBR cov tebchaw tshwj xeeb rau kev thov kev tsheb ciav hlau.

Peb tus nqi qis -kub NBR compound ua tiav:

• Iav Transition Temperature (Tg): qis dua -60 degree
• Zoo heev roj kuj tuav
• Cov roj hmab txhim khu kev qha-rau- hlau sib txuas rau kev sib koom ua ke valve core applications
• Kev ua haujlwm ruaj khov los ntawm kev rov ua dua qis -kub cycling

 

Ntau xyoo dhau los, peb tau muab ntau dua 1 lab roj hmab-cov hlau sib txuas valve cores rau peb cov neeg siv khoom thoob ntiaj teb, nrog rau 0 kev sib txuas tsis ua haujlwm. Cov yam ntxwv no ua rau TGE cov khoom tsim nyog rau kev tsheb ciav hlau nres, pneumatic li qub, cov cuab yeej tswj kev lag luam, thiab lwm yam kev siv uas xav tau kev sib khi ruaj khov hauv qhov chaw txias.

 

 

Iav Transition Temperature (Tg) yog cov khoom siv tseem ceeb uas piav qhia txog kev hloov pauv ntawm cov khoom siv roj hmab mus rau cov cwj pwm iav. Thaum nws muab cov ntaub ntawv tseem ceeb ntawm qhov qis - qhov kub thiab txias, cov engineers yuav tsum tsis txhob cia siab rau Tg ib leeg rau kev xaiv cov khoom sib khi. Nyob rau hauv peb tsab xov xwm tom ntej no nyob rau hauv no series, peb yuav tshuaj xyuas TR10 (Temperature Retraction ntawm 10%), uas ncaj qha cuam tshuam nrog qhov tseeb sealing kev ua tau zoo.

 

 

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Nrhiav rau roj hmab- hlau sib txuas valve cores rau braking lossis pneumatic tswj tshuab? Peb pab pawg neeg tsim khoom txhawb nqa kev xaiv cov khoom raws li kev ua haujlwm kub, kev sib khi xov xwm, thiab kev pabcuam lub neej. Peb muab cov kev cai roj hmab formulations, validated bonding txheej txheem, thiab zoo ib yam ntau lawm zoo los pab peb cov neeg muas zaub txhim kho cov cuab yeej kev ntseeg siab nyob rau hauv xav tau daim ntawv thov.Nyem no tiv tauj peb