Kupititsa patsogolo ukadaulo wopangira zikopa zopangira zachilengedwe zozikidwa pa polyurethane yapamwamba yolimba yamadzi.

Chikopa chopangidwa ndi polyurethane ndi chinthu chatsopano chokhala ndi zolinga zambiri chomwe chachitika mwachangu m'zaka zaposachedwa.Amapangidwa pamaziko a zokutira polyurethane slurry ndi lotseguka selo dongosolo pa otsika m'munsi mwa nsalu ndi sanali nsalu nsalu.Komabe, ma polyurethanes ambiri omwe amagwiritsidwa ntchito ndi zosungunulira, ndipo kuwonongeka kwa chilengedwe ndi thupi la munthu chifukwa cha zotsalira za DMF ndi VOC volatilization pakupanga kwakhala vuto laukadaulo lomwe likuletsa kukula kwamakampani.Pakali pano, madzi opangidwa polyurethane ndi m'malo abwino zosungunulira zochokera polyurethane, koma zofooka zake ndi otsika olimba okhutira, osauka thupi katundu, zomatira mosavuta pa ❖ kuyanika pamwamba, osauka hydrolysis kukana, pang'onopang'ono volatilization mu ❖ kuyanika ndondomeko kupanga, ndi otsika kupanga. kuchita bwino.
Kutengera lingaliro la "chitetezo chobiriwira ndi chilengedwe" ndikuwongolera mtengo wowonjezera wa zinthu, ntchitoyi yapanga dongosolo laukadaulo watsopano wopanga ma polyurethane apamwamba komanso amadzimadzi komanso chikopa chopangidwa ndi chilengedwe chomwe chingalowe m'malo mwa polyurethane yosungunulira.Ma polyurethane okhala ndi madzi olimba kwambiri opangidwa ndikupangidwa amatha kuchepetsa zotsalira za DMF ndi kusinthika kwa VOC kuchokera kugwero lachitukuko ndikuwongolera magwiridwe antchito.Pa nthawi yomweyi, chifukwa filimuyi ili ndi magulu ambiri a hydrophilic ndi mapangidwe a microporous, chophimbacho chimakhala ndi mpweya wabwino komanso mpweya wabwino, ndipo ndizopanga zenizeni.Kuphatikiza apo, polyurethane imasinthidwa ndi zida za nano kuti ikhale yogwira ntchito kwambiri komanso yamitundu ingapo yachikopa ya polyurethane yomwe iyenera kufunidwa pamsika, kuti ipititse patsogolo mtengo wowonjezera wazinthu ndikulimbitsa mpikisano wamsika.
Zomwe zili mu kafukufuku:
(1) Kukonzekera ukadaulo wazinthu zolimba kwambiri zokhala ndi madzi a polyurethane.Malinga ndi masamu chitsanzo cha chochuluka kachulukidwe zinthu ozungulira, mkulu olimba zili amadzimadzi polyurethane ndi Mipikisano dimensional tinthu kukula kugawa anakonza.The Mipikisano dimensional tinthu kukula kugawa akhoza kusintha olimba zili odzola popanda kuwonjezera mamasukidwe akayendedwe apamwamba kwambiri.Vuto la kukhuthala kwakukulu ndi kulimba otsika popanga zinthu zambiri zam'madzi za polyurethane zimathetsedwa.Zomwe zili zolimba ndi> 50%, mawonekedwe a filimuyi ndi 101.1 °, ndipo kukana kwa madzi ndi kukana kwa hydrolysis kumatheka.
(2) Ukadaulo wopanga ma bass opangidwa ndi madzi a polyurethane thovu.Kutengera zolimba zolimba za aqueous polyurethane, kuphatikiza kwa njira zopangira thovu zakuthupi ndi zamankhwala kumasankhidwa kuti apange mabasi amadzi a polyurethane okhala ndi selo losinthika.Chogulitsacho ndi chochuluka, chakuda ndi chofewa, chokhala ndi mayamwidwe abwino a chinyezi ndi permeability, kukwaniritsa zero VOC ndi DMF mpweya pakupanga, kuchepetsa vuto la mapeto a chithandizo ndi kupulumutsa mtengo wa zosungunulira kuchira ndi mankhwala pambuyo pake.
(3) Kukonzekera umisiri wa zinchito madzi polyurethane.Multifunctional waterborne polyurethane with super hydrophobicity, wear resistance and anti-static properties zakonzedwa pogwiritsa ntchito makina ophatikizira a "mercapto monoene", nanotechnology ndi ukadaulo wochiritsa kuwala.Itha kugwiritsidwa ntchito pakupanga zikopa, zokutira nsalu, kulekanitsa mafuta ndi madzi, chitetezo chamagetsi ndi madera ena.