Kodi PU material ndi chiyani?
Kutanthauzira koyambirira kwa zinthu za PU
PU imayimira Polyurethane, zinthu za polima zomwe zimagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana. Polyurethane imapangidwa ndi machitidwe a mankhwala pakati pa isocyanate ndi polyol, ndipo imakhala ndi zinthu zambiri zakuthupi ndi zamankhwala. Chifukwa PU imatha kusintha mawonekedwe ake posintha mawonekedwe ake, imagwiritsidwa ntchito pazinthu zosiyanasiyana, kuyambira pazovala mpaka zomangira.
Gulu ndi Katundu wa PU
Polyurethane imatha kugawidwa m'mitundu yosiyanasiyana, kuphatikiza thovu lolimba, thovu losinthika, ma elastomers, zokutira ndi zomatira. Ma thovu olimba amagwiritsidwa ntchito nthawi zambiri kutsekereza ndi mapanelo omangira, pomwe thovu losinthika limagwiritsidwa ntchito kwambiri pamipando, mipando yamagalimoto ndi matiresi. Komano, ma elastomers amawonetsa kukhazikika kwa rabara ndipo amagwiritsidwa ntchito popanga nsapato, matayala ndi zina zotero. Chifukwa cha kulimba kwake bwino, kukana kwa abrasion, kukana kwamafuta komanso kukana kukalamba, zinthu za PU zikuwonetsa magwiridwe antchito osiyanasiyana.
Kugwiritsa ntchito PU m'mafakitale osiyanasiyana
Polyurethane imagwira ntchito zosiyanasiyana m'magawo osiyanasiyana. Mwachitsanzo, pamakampani opanga nsalu, PU imagwiritsidwa ntchito kwambiri popanga zikopa zopanga, zomwe zimakhala ndi mawonekedwe ofanana ndi zikopa koma ndizotsika mtengo komanso zosavuta kuzisamalira. M'makampani omanga, thovu la PU limagwiritsidwa ntchito ngati chida chapamwamba kwambiri, chomwe chimayamikiridwa chifukwa cha kutsika kwamafuta komanso kukana chinyezi. M'makampani amagalimoto, zida za PU zimagwiritsidwa ntchito popanga thovu pamipando ndi zida zamkati chifukwa zimapereka chitonthozo komanso kulimba.
Kukhazikika kwa chilengedwe komanso kukhazikika kwa zida za PU
Pamene chidziwitso cha chilengedwe chikuwonjezeka, kukhazikika kwa zipangizo za PU kwakhala vuto lalikulu. Mwachizoloŵezi, mankhwala ena owopsa angagwiritsidwe ntchito popanga PU, koma m'zaka zaposachedwa, makampaniwa apanga njira zopangira zachilengedwe monga polyurethane yamadzi komanso kugwiritsa ntchito zinthu zongowonjezwdwa. Zida zatsopano za PU izi sizimangochepetsa kukhudzidwa kwa chilengedwe, komanso zimakulitsa chitetezo chazinthu komanso kukhazikika.
Chidule
Kodi PU material ndi chiyani? Ndizinthu zosunthika, zowoneka bwino za polima zomwe zimagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana. Kaya muzovala, zomanga, zamagalimoto, kapena zoteteza chilengedwe, PU imayamikiridwa chifukwa cha mawonekedwe ake abwino a physicochemical. Ndi kupita patsogolo kwaukadaulo komanso kupititsa patsogolo zofunikira zachitetezo cha chilengedwe, kuchuluka kwa ntchito ndi luso la zida za PU zipitilira kukula ndikuwongolera.