Ikirangantego cya polyurethane, bikozwe mubikoresho bya reberi ya polyurethane, nibintu bigize ibice byinshi mubikorwa byinganda. Ikidodo kiza muburyo butandukanye, harimo O-impeta, V-impeta, U-impeta, Y-impeta, kashe y'urukiramende, kashe imeze neza, hamwe no gukaraba.
Polyurethane reberi, polymer yubukorikori, ikuraho itandukaniro riri hagati ya reberi karemano na plastiki zisanzwe. Byinshi bikoreshwa mugutunganya urupapuro rwicyuma, reberi ya polyurethane ivugwa cyane cyane mubwoko bwa polyester. Ikomatanyirizwa muri acide ya adipic na Ethylene glycol, bikavamo polymer ifite uburemere bwa molekuline igera ku 2000. Iyi polymer yongeye kwitabwaho kugirango ibe prepolymer hamwe nitsinda ryanyuma rya isocyanate. Prepolymer noneho ivangwa na MOCA (4,4′-methylenebis (2-chloroaniline)) hanyuma ikajugunywa mubibumbano, hanyuma ikurikirwa na volcanisation ya kabiri kugirango itange ibicuruzwa bya reberi ya polyurethane hamwe nuburemere butandukanye.
Ubukomezi bwa kashe ya polyurethane irashobora guhuzwa kugirango yujuje ibyangombwa bisabwa byo gutunganya impapuro, kuva kuri 20A kugeza 90A kurwego rwo gukomera.
Ibintu by'ingenzi biranga imikorere:
- Imyambarire idasanzwe yo kwambara: reberi ya polyurethane yerekana imyambarire irwanya ubwoko bwose bwa reberi. Ibizamini bya laboratoire byerekana ko imyambarire yayo yikubye inshuro 3 kugeza kuri 5 za reberi karemano, hamwe nukuri kwisi ikoreshwa kenshi kugeza inshuro 10 kuramba.
- Imbaraga Zinshi na Elastique: Muri Shore A60 kugeza A70 urwego rukomeye, reberi ya polyurethane yerekana imbaraga nyinshi kandi byoroshye.
- Kurenza urugero Cushioning na Shock Absorption: Ku bushyuhe bwicyumba, ibikoresho bya reberi ya polyurethane birashobora gukuramo 10% kugeza kuri 20% byingufu zinyeganyega, hamwe nigipimo kinini cyo kwinjirira mugihe cyinyeganyeza cyinshi.
- Amavuta meza na chimique irwanya: reberi ya polyurethane yerekana isano iri hagati y’amavuta y’amabuye y'agaciro adafite inkingi kandi ikomeza kutagira ingaruka ku bicanwa (nka kerosene na lisansi) hamwe n’amavuta ya mashini (nka hydraulic na lubricating amavuta), irusha rubber intego rusange hamwe na reberi ya nitrile. Ariko, irerekana kubyimba cyane muri alcool, esters, na hydrocarbone nziza.
- Coefficient yo hejuru cyane: Mubisanzwe hejuru ya 0.5.
- Ibintu byiyongereyeho: Kurwanya ubushyuhe buke, kurwanya ozone, kurwanya imirasire, kubika amashanyarazi, hamwe na adhesion.
Porogaramu:
Bitewe nuburyo bwiza bwumubiri nubukanishi, reberi ya polyurethane ikoreshwa kenshi mubikorwa byogukora cyane, harimo ibicuruzwa birwanya kwambara, ibintu birwanya amavuta menshi, hamwe nubukomere bwinshi, ibice byinshi-modulus. Irasanga ikoreshwa cyane mu nganda zitandukanye:
- Imashini na Automotive: Gukora feri yumurongo mwinshi wa feri ya feri, ibice birwanya anti-vibration reberi, amasoko ya reberi, guhuza, hamwe nibikoresho byimashini.
- Ibicuruzwa birwanya amavuta: Gukora imashini zandika, kashe, ibikoresho bya lisansi, hamwe na kashe ya peteroli.
- Ibidukikije bikarishye: Byakoreshejwe mu miyoboro ya convoyeur, gusya ibikoresho byo gusya, ecran, akayunguruzo, inkweto zinkweto, ibiziga byo gutwara ibiziga, ibihuru, feri, hamwe nipine yamagare.
- Gukonjesha Ubukonje no Kunama: Gukora nk'ibikoresho byo gukonjesha gukonje no kugonda, gusimbuza ibyuma bipfa gutwara igihe kandi bihenze.
- Rubber ya Foam: Mugukoresha reaction yitsinda rya isocyanate hamwe namazi kugirango irekure CO2, reberi yoroheje yoroheje ifitemo imashini nziza cyane irashobora gukorerwa, nibyiza kubitera, kubika ubushyuhe, gukoresha amajwi, hamwe no kurwanya anti-vibration.
- Porogaramu zubuvuzi: Zikoreshwa mubice bigize reberi ikora, imiyoboro yamaraso yubukorikori, uruhu rwubukorikori, imiyoboro ya infusion, ibikoresho byo gusana, hamwe no gukoresha amenyo.
Igihe cyo kohereza: Nzeri-17-2025