Zvisimbiso zverabha zvePolyurethane, yakagadzirwa nezvinhu zve polyurethane rabha, zvinhu zvakakosha mumashandisirwo akasiyana-siyana emaindasitiri. Zvisimbiso izvi zvinouya nenzira dzakasiyana-siyana, zvinosanganisira O-rings, V-rings, U-rings, Y-rings, rectangular seals, custom-shaped seals, uye sealing washers.
Rabha yepolyurethane, iyo yakagadzirwa nepolymer, inobatanidza musiyano uripo pakati perabha yechisikigo nemapurasitiki echinyakare. Inonyanya kushandiswa mukugadzirisa kumanikidzwa kwesimbi, rabha yepolyurethane iri kutaurwa nezvayo inonyanya kushandiswa mumhando yepolyester casting. Inogadzirwa kubva kuadipic acid ne ethylene glycol, zvichikonzera polymer ine huremu hwemamorekuru hunosvika 2000. Iyi polymer inogadziriswazve kuti igadzire prepolymer ine mapoka ekupedzisira e isocyanate. Prepolymer inozosanganiswa neMOCA (4,4′-methylenebis(2-chloroaniline)) uye inokandwa mumamolds, ichiteverwa ne secondary vulcanization kugadzira zvigadzirwa zve polyurethane rabha zvine mwero wakasiyana wekuoma.
Kuomarara kwezvisimbiso zverabha zvepolyurethane kunogona kugadzirwa kuti kuenderane nezvinodiwa zvekugadzirisa simbi, kubva pa20A kusvika 90A pachikero chekuomarara kweShore.
Hunhu Hukuru hweKushanda:
- Kusapfeka Kwakanaka: Rabha yepolyurethane ine simba guru rekudzivirira kusapfeka pakati pemhando dzese dzerabha. Kuongororwa kwerabhoritari kunoratidza kuti kusapfeka kwayo kwakapetwa katatu kusvika kashanu pane rabha yechisikigo, uye mashandisirwo ayo chaiwo anowanzoonekwa kagumi kupfuura kugara kwenguva refu.
- Simba Rakakura uye Kusasimba: Mukati merudzi rwekuomarara kwegungwa kubva kuA60 kusvika kuA70, rabha yepolyurethane inoratidza simba rakakwirira uye kusasimba kwakanyanya.
- Kunyudzwa Kwepamusoro uye Kubatwa Nekutya: Pakupisa kwemukamuri, zvikamu zverabha zvepolyurethane zvinogona kunyudzwa 10% kusvika 20% yesimba rekunyudzwa, uye mwero wekunyudzwa wakakwira pakuwedzera kwekunyudzwa.
- Kuramba Mafuta Nemakemikari Zvakanaka: Rabha yepolyurethane hainyanyi kuenderana nemafuta ezvicherwa asiri epolar uye hainyanyi kukanganiswa nemafuta (akadai separafini nepeturu) nemafuta emakanika (akadai semafuta ehydraulic nemafuta ekuzora), inoshanda kupfuura marubha ekushandisa uye inokwikwidzana nerubha yenitrile. Zvisinei, inoratidza kuzvimba kukuru mualcohols, esters, uye aromatic hydrocarbons.
- Kukwikwidzana Kwakanyanya: Kazhinji pamusoro pe0.5.
- Zvimwe Zvimiro: Kudzivirira kupisa kwakaderera, kudzivirira ozone, kudzivirira mwaranzi, kudzivirira magetsi, uye kunamatira.
Mashandisirwo:
Zvichienderana nehukuru hwayo hwepanyama uye hwemakanika, rabha yepolyurethane inowanzo shandiswa mumabasa epamusoro-soro, kusanganisira zvigadzirwa zvisingaparare, zvinhu zvinodzivirira mafuta zvakanyanya, uye zvikamu zvekuomarara zvakanyanya, zvine modulus yakawanda. Inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana:
- Michina neMotokari: Kugadzira zvinhu zvinodzivirira mabhureki zvine frequency yakakwira, zvikamu zverabha zvinodzivirira kudedera, zvitubu zverabha, zvinobatanidza, uye zvikamu zvemichina yemachira.
- Zvigadzirwa Zvisingapindi Mafuta: Kugadzira maroller ekudhinda, zvisimbiso, midziyo yemafuta, uye zvisimbiso zvemafuta.
- Nzvimbo Dzakaoma Dzekukweshana: Dzinoshandiswa mumapaipi ekufambisa, machira emidziyo yekukuya, masikirini, mafirita, magadziko eshangu, mavhiri ekufambisa friction, mabushing, mabrake pads, uye matai emabhasikoro.
- Kudzvanya uye Kukombama muchando: Inoshanda sechishandiso chekugadzirisa maitiro matsva ekudzvanya nekukombama muchando, ichitsiva madhayi esimbi anotora nguva uye anodhura.
- Rabha reFuro: Nekushandisa nzira yemapoka eisocyanate nemvura kuburitsa CO2, rabha reFuro rakareruka rine hunhu hwakanaka hwemakanika rinogona kugadzirwa, rakakodzera kuputira, kuputira kupisa, kudzivirira ruzha, uye kudzivirira kudedera.
- Mashandisirwo Ekurapa: Anoshandiswa muzvikamu zverabha zvinoshanda, mitsipa yeropa yekugadzira, ganda rekugadzira, machubhu ekuisa mvura, zvinhu zvekugadzirisa, uye zvinoshandiswa pakushandisa mazino.
Nguva yekutumira: Gunyana-17-2025