Polyurethane elastomers ndeye block polymers, kureva, polyurethane macromolecules inoumbwa ne "soft segment" uye "hard segment" uye inoumba micro phase yekuparadzanisa chimiro.Iwo akaomesesa zvikamu (zvakatorwa kubva kune isocyanates uye macheni ekuwedzera) akaparadzirwa munzvimbo yakapfava chikamu chechikamu (chinobva kune oligomer polyols) uye chinotamba chinzvimbo chemuviri chekubatanidza mapoinzi.Naizvozvo, zvichienzaniswa nemamwe machira ekugadzira (elastomers), polyurethane elastomers ane simba riri nani uye nekupfeka kuramba, Kureba kwepamusoro kunogona kuchengetedzwa kana kuoma kwacho kwakakwira.
Elastic polyurethane zvinhu, zvinonzi "kesi" kune dzimwe nyika, kunyanya zvinosanganisira zvechinyakare polyurethane elastomer zvigadzirwa, polyurethane epurasitiki runway uye zvimwe zvinhu zvepavhu, polyurethane machira asingapindi mvura, zvinonamira, zvisimbiso, zvinonamira muhari, nezvimwewo, zvichiverengera 40% huwandu hwakazara hwezvigadzirwa zve polyurethane.Zvizhinji zvezvigadzirwa zvakaporeswa zvemakesi emidziyo (mvura-yakavakirwa-yemvura uye yakanyungudika-yakagadziriswa inobvisa mvura nezvinonyungudutsa) isiri furo elastic polyurethane zvinhu.PU synthetic leather resin, mamwe machira uye zvinonamira zvinonyungudutsa-based kana aqueous zvigadzirwa, izvo zvinogona zvakare kutorwa se polyurethane elastomer zvinhu mupfungwa yakafara.Mupfungwa nhete, polyurethane elastomer inoreva cast polyurethane elastomer (CPU), thermoplastic polyurethane elastomer (TPU) uye yakasanganiswa polyurethane elastomer (MPU), inoverengera 10% kana zvishoma kushoma kweiyo yakazara polyurethane.CPU neTPU ndiwo makuru epolyurethane elastomers, uye misiyano yavo iri muzvinhu zvakaita sekugadzira maitiro uye cheni extender.Idzi rudzi rwechinyakare polyurethane elastomer, inozivikanwawo se "polyurethane rabha", ndeyemhando yakakosha yerabha yekugadzira.High performance polyurethane elastomer ndicho chinhu chine yakanakisa kupfeka kuramba pakati pezvese synthetic polymer zvinhu.Iyo inozivikanwa se "mambo wekupfeka kusagadzikana".Inoshandiswa zvakanyanya muminda yakawanda, uye zvikumbiro zvitsva zvichiri kuwedzera.
Polyurethane elastomers inogona kushandiswa kutsiva simbi, mapurasitiki uye akajairwa rabha mune mamwe minda.
Kuenzaniswa nezvinhu zvesimbi, polyurethane elastomer ine zvakanakira uremu huremu, ruzha rushoma, kurasikirwa kuramba, mutengo wakaderera wekugadzirisa uye acid corrosion kuramba.Kuenzaniswa nemapurasitiki, ine zvakanakira kusimba kwakanyanya uye yakakwirira kupfeka kuramba.Kana ichienzaniswa nerabha yakajairwa, polyurethane elastomer ine zvakanakira kupfeka kuramba, kucheka kuramba, kuramba kubvarura, kukwirira kwekutakura, ozone kuramba, kugadzira nyore, kudira uye kudurura, uye kuomarara kwakakura.
Polyurethane elastomer inokosha yakasiyana-siyana ye polyurethane.Parizvino, kushandiswa kwayo kunoda kusvika 10% yehuwandu hwekushandiswa kwepolyurethane.Polyurethane elastomer inoshandiswa kugadzira marudzi ese emavhiri erabha, mabhandi ekutakurisa mvura, anodzivirira mvura uye anopokana nerubha hose, mitsetse yekuisa chisimbiso nemhete, tambo sheaths uye akasiyana mafirimu.Zvigadzirwa zvinoshandiswa zvakanyanya musimbi nesimbi, kugadzira mapepa, migodhi, michina, kudhinda uye mamwe maindasitiri.Polyurethane elastomer inogona kugadziridzwa nemamwe mapolymer, faibha, poda mafirita, nezvimwewo kuderedza mutengo nekuvandudza mashandiro.
Nguva yekutumira: May-05-2022