Polyurethane (PU), lebitso le felletseng la polyurethane, ke motsoako oa polymer, o hlahisitsoeng ka 1937 ke Otto Bayer le ba bang. Polyurethane e na le mekhahlelo e 'meli e meholo: polyester le polyether. Li ka etsoa ka polasetiki ea polyurethane (haholo-holo foam), likhoele tsa polyurethane (tse tsejoang e le spandex Chaena), rabara ea polyurethane le elastomers. Polyurethane ke thepa ea polymer e loketseng ho sebelisoa e le sekoahelo sa lebili tlhahisong ea li-caster tsa indasteri.
Melemo e meholo ea li-caster tsa polyurethane ke tse latelang haholo-holo:
Taba ea pele, ts'ebetso ea mefuta e ka fetoloang
Lipontšo tse 'maloa tsa ts'ebetso ea' mele le ea mechini li ka fetoloa ka khetho ea lisebelisoa tse tala le liforomo, ka har'a mefuta e itseng ea liphetoho tse tenyetsehang, e le ho fihlela litlhoko tse ikhethang tsa mosebelisi bakeng sa ts'ebetso ea sehlahisoa.
Ea bobeli, khanyetso e phahameng ea ho khohlela
Ha ho na le metsi, oli le maemo a mang a ho sebetsa a mongobo, li-polyurethane caster li hanyetsa ho tsofala hangata ho feta thepa e tloaelehileng ea rabara ka makhetlo a 'maloa ho isa ho a mangata. Lisebelisoa tsa tšepe tse kang tšepe le tse ling tse thata, empa ha se hakaalo hore li hanela ho tsofala!
Ea boraro, mekhoa ea ho e sebetsana, ho sebetsa ho pharaletseng
Li-elastomer tsa polyurethane li ka bōptjoa ka rabara ea morero o akaretsang ka ho etsa polasetiki, ho kopanya le ho vulcanizing (MPU); li ka boela tsa etsoa rabara ea metsi, ho tšela le ho bopa kapa ho fafatsa, ho tiisa le ho bopa ka centrifugal (CPU); li ka boela tsa etsoa ka thepa ea granular le polasetiki e tloaelehileng ka ho enta, ho ntša, ho etsa calendering, ho etsa blow molding le mekhoa e meng (CPU). Likarolo tse bōpiloeng kapa tse entsoeng ka ente, ka har'a mofuta o itseng oa thatafalo, li ka boela tsa sehoa, tsa siloa, tsa cheka le ho sebelisoa ha mechini e meng.
Ea bone, ho hanyetsa oli, ho hanyetsa ozone, ho hanyetsa botsofali, ho hanyetsa mahlaseli a kotsi, ho hanyetsa mocheso o tlase, phetiso e ntle ea molumo, matla a matla a sekhomaretsi, ho lumellana ho hoholo ha lintho tse phelang le ho lumellana ha mali. Melemo ena ke eona hantle lebaka leo ka lona li-elastomer tsa polyurethane li sebelisoang haholo sesoleng, lifofaneng, li-acoustics, baeloji le mafapheng a mang.
Nako ea poso: Mphalane-30-2023