Zaukadaulo za Kupopera mbewu kwa Foam Polyurethane Field
Chithovu cholimba cha polyurethane (PU) ndi polima yokhala ndi gawo lobwerezabwereza la gawo la carbamate, lopangidwa ndi zomwe isocyanate ndi polyol. Chifukwa cha kusungunula kwake kwabwino kwambiri kwamafuta ndi magwiridwe antchito osalowa madzi, imapeza ntchito zambiri pamakoma akunja ndi kutsekereza padenga, komanso posungirako kuzizira, malo osungiramo tirigu, zipinda zosungiramo zinthu zakale, mapaipi, zitseko, mazenera ndi madera ena apadera otenthetsera matenthedwe.
Pakali pano, kupatula kutchingira padenga ndi kutsekereza madzi, imagwiranso ntchito zosiyanasiyana monga malo osungiramo ozizira komanso makhazikitsidwe akuluakulu mpaka apakatikati.
Ukadaulo wofunikira pakumanga kopopera kwa thovu la polyurethane
Kuchita bwino kwaukadaulo wopopera thovu wa polyurethane kumabweretsa zovuta chifukwa cha zovuta zomwe zingachitike ngati mabowo a thovu osafanana. Ndikofunikira kupititsa patsogolo maphunziro a ogwira ntchito yomanga kuti athe kuthana bwino ndi njira zopopera mbewu ndi kuthetsa mavuto omwe amakumana nawo pomanga. Zovuta zaukadaulo pakumangirira kupopera mbewu mankhwalawa zimayang'ana kwambiri pazinthu izi:
Kuwongolera pa whitening nthawi ndi zotsatira za atomization.
Kupanga thovu la polyurethane kumaphatikizapo magawo awiri: kutulutsa thovu ndi kuchiritsa.
Kuchokera pagawo losakanikirana mpaka kukula kwa chithovu kutha - njirayi imatchedwa thovu. Panthawi imeneyi, kugawanitsa kwa dzenje la buluu kuyenera kuganiziridwa pamene kuchuluka kwa ester yotentha kumatulutsidwa mu dongosolo panthawi ya kupopera mbewu mankhwalawa. Kufanana kwa bubble kumatengera zinthu monga:
1. Kupatuka kwa chiŵerengero cha zinthu
Pali kusiyana kwakukulu pakati pa thovu lopangidwa ndi makina ndi lomwe limapangidwa pamanja. Nthawi zambiri, makina opangidwa ndi zida ndi 1: 1; komabe chifukwa cha kusiyanasiyana kwa kukhuthala kwa zinthu zoyera za opanga osiyanasiyana - kuchuluka kwa zinthu zenizeni sikungafanane ndi izi zomwe zimapangitsa kuti pakhale kusiyana kwa kachulukidwe ka thovu kutengera kugwiritsa ntchito kwambiri zinthu zoyera kapena zakuda.
2.Kutentha kozungulira
Ma polyurethane thovu amakhudzidwa kwambiri ndi kusinthasintha kwa kutentha; njira yawo yotulutsa thovu imadalira kwambiri kupezeka kwa kutentha komwe kumachokera ku machitidwe onse a mankhwala mkati mwa dongosolo lokha pamodzi ndi zinthu zachilengedwe.
Kutentha kozungulira kukakhala kokwanira kuti chilengedwe chizitentha - chimafulumizitsa liwiro la momwe zimachitikira zomwe zimapangitsa kuti thovu litakulitsidwa ndi kusasunthika kosasinthasintha.
Mosiyana ndi kutentha kwapansi (monga pansi pa 18 ° C), kutentha kwina kumatayika kumalo ozungulira kumapangitsa kuti machiritso azitalikirapo pamodzi ndi kuchulukitsitsa kwa nkhungu kumapangitsa kuti mtengo wapangidwe ukhale wokwera.
3.Mphepo
Panthawi yopopera mbewu mankhwalawa, liwiro la mphepo liyenera kukhala lochepera 5m/s; Kupitilira muyeso uwu kumachotsa kutentha komwe kumapangidwa ndi zinthu zomwe zimakhudza kutulutsa thovu mwachangu ndikupangitsa kuti zinthu zikhale zolimba.
4.Base kutentha & chinyezi
Kutentha kwapakhoma kumakhudza kwambiri kutulutsa thovu kwa polyurethane panthawi yogwiritsira ntchito makamaka ngati nyengo yozungulira & m'munsi mwakhoma ndi yotsika - kuyamwa mwachangu kumachitika pambuyo pakupaka koyamba kumachepetsa kukolola konse.
Chifukwa chake, kuchepetsa nthawi yopuma masana pakumanga pamodzi ndi makonzedwe okonzekera kumakhala kofunika kwambiri kuti muwonetsetse kuti chiwongola dzanja cha polyurethane chikukulirakulira.
Foam Yolimba ya Polyurethane imayimira chinthu chopangidwa ndi polima chomwe chimapangidwa kudzera muzochita pakati pa zigawo ziwiri - Isocyanate & Polyether yophatikizidwa.
Zigawo za Isocyanate zimakhudzidwa mosavuta ndi madzi opangira urea; Kuchulukira kwa urea kumapangitsa kuti thovu likhale lolimba pomwe kumachepetsa kumatira pakati pawo & magawo kuyenera kupangitsa kuti pakhale malo opanda dzimbiri/fumbi/chinyontho/chinyontho/chinyontho makamaka kupewa masiku amvula pomwe kukhalapo kwa mame/chisanu kumafunika kuchotsedwa kenako kuumitsa musanapitirire.
Nthawi yotumiza: Jul-16-2024