1. Ntuj Roj Hmab (NR)
Cov yam ntxwv ua haujlwm
Elasticity: Tensile elongation mus txog 1000%, nrog zoo resilience (rebound resilience> 70%).
Mechanical StrengthTensile lub zog yog li ntawm 20-30 MPa, tsim kua muag ntawm 50-60 kN / m.
Qhov kub thiab txias: -5℃txog 80℃(kev pabcuam kub txwv).
Tshuaj tiv thaiv: Ua rau cov roj, ozone, thiab muaj zog acids / bases.
Tej kev siv
Pneumatic log tsheb (suav suav txog 70% ntawm NR noj thoob ntiaj teb), kev sib cais ntawm kev vibration, thiab conveyor siv nyob rau hauv tsis yog - roj ib puag ncig.
2. Nitrile Butadiene Roj Hmab (NBR)
Cov yam ntxwv ua haujlwm
Roj kuj: Tus nqi o<10% in ASTM #3 oil at 70°C for 70h.
Mechanical Properties: Tensile lub zog 15-25 MPa, nrog zoo abrasion kuj.
Qhov kub thiab txias: -20℃txog 100℃(lub sij hawm luv mus txog 120℃).
Kev txwv: Tsis zoo ozone kuj thiab qis -kub yooj.
Tej kev siv
Seals rau automotive engines, roj hoses, thiab gaskets nyob rau hauv petrochemical khoom.
3. Silicone Roj Hmab (VMQ)
Cov yam ntxwv ua haujlwm
Kub siab heev: -60℃txog 250℃(kev pabcuam txuas ntxiv), nrog thermal stability mus txog 300 degree.
Biocompatibility: USP Class VI tau ntawv pov thawj rau daim ntawv thov kev kho mob.
Kev txwv: Tsawg zog kua muag (<10 kN/m) and poor oil resistance.
Tej kev siv
Kev kho mob catheters, aerospace seals, thiab siab -kub gaskets hauv semiconductor manufacturing.
4. Chloroprene Roj Hmab (CR)
Cov yam ntxwv ua haujlwm
Huab cua Resistance: Ozone resistance class A (ASTM D1149), UV stability >5 xyoos sab nraum zoov.
Qhov kub thiab txias: -30°C to 100°C, with flame-retardant properties (oxygen index >38).
Mechanical StrengthTensile zog 25-35 MPa, kua muag tsis kam 30-40 kN / m.
Tej kev siv
Hlau thiab cable rwb thaiv tsev, ru tsev membranes, thiab hluav taws hose liners.
5. Fluoroelastomer (FKM)
Cov yam ntxwv ua haujlwm
Tshuaj tiv thaiv: Resistant rau H₂SO₄ (98%), NaOH (50%), thiab aviation fuels.
Qhov kub thiab txias: -20℃txog 260 degree, nrog rau lub sij hawm luv luv mus txog 300℃.
Mechanical PropertiesLub zog tensile 15-20 MPa, compression teeb<20% at 200°C for 70h.
Tej kev siv
Seals nyob rau hauv tshuaj reactors, aerospace engine Cheebtsam, thiab downhole roj cov cuab yeej.
Cov txheej txheem xaiv cov khoom siv
| Kev ua tau zoo | Hom Roj Hmab pom zoo |
|---|---|
| High elasticity / hnav tsis kam | Ntuj Roj Hmab (NR) |
| Roj / media kuj | Nitrile Butadiene Roj Hmab (NBR) |
| Kub siab heev | Silicone Roj Hmab (VMQ) |
| Sab nraum zoov huab cua | Chloroprene Roj Hmab (CR) |
| Hnyav tshuaj ib puag ncig | Fluoroelastomer (FKM) |
Qhov kev sib piv no qhia txog qhov tseem ceeb ntawm kev sib piv cov khoom siv roj hmab nrog cov kev xav tau ntawm kev ua haujlwm. Cov kws tshaj lij thiab cov kws tshawb fawb txog cov khoom siv tuaj yeem siv lub hauv paus no los ua kom zoo tshaj qhov kev ntseeg siab ntawm cov khoom siv thiab cov nqi ntawm lub neej nyob hauv ntau hom kev lag luam.
