Mapangidwe luso - polyurethane otentha Sungunulani zomatira.

Zomatira zotentha zosungunuka ali ndi ubwino wa liwiro lomangirira mwachangu, kuteteza chilengedwe, njira yosavuta yolumikizirana, komanso mphamvu yabwino yomangirira komanso kusinthasintha. Chifukwa chake, zomatira zomata zomangira ma bukhu opanda zingwe zotentha, zomatira zosungunuka ndi kusindikiza, ndi kupanga nsapato zatulukira. , zomatira za nsalu zotentha zosungunuka ndi zinthu zina, ndipo m’zaka zaposachedwapa, pakhala kusintha kwatsopano pankhani ya kusiyanasiyana ndi kagwiridwe kake.

Zomatira zambiri zotentha zosungunuka zimapangidwa ndi ethylene-vinyl acetate (EVA), poliyesitala, polyamide ndi ma resins ena otentha. Chifukwa cha kuchepa mphamvu ndi elasticity wa EVA ndi poliyesitala otentha kusungunula zomatira, iwo sangathe kupirira kwambiri mphamvu kunja. Kuonjezera apo, chifukwa cha kusungunuka kwapamwamba komanso kuuma kwa zomatira zotentha za polyamide, ndizochepa zomwe zimagwiritsidwa ntchito.

Theotentha-kusungunuka polyurethane zomatira makamaka amagwiritsa ntchito chomangira wa haidrojeni mu kapangidwe kuti adutse thupi crosslinking, kuti polyurethane otentha-kusungunuka zomatira ali elasticity kwambiri ndi mphamvu. Zomatira za polyurethane zotentha zimataya chomangira chake cha haidrojeni chikatenthedwa, kukhala madzi osungunuka a viscous, ndikubwerera kuzinthu zake zoyambirira zitazizira. Choncho, zomatira za polyurethane zotentha zosungunuka zimakhala ndi mphamvu zomangirira kwambiri, kukana zosungunulira, kukana kuvala, ndi zina zotero. Zimakhala zodalirika kwambiri pakugwiritsa ntchito, mankhwala abwino komanso ofanana ndi thupi, njira yosavuta yolumikizira (kuchepetsa ndalama zopangira), ndi kutaya pang'ono (osagwiritsidwa ntchito). Zomatira zimatha kusungidwa kuti zigwiritsidwe ntchito pambuyo pake), palibe vuto losakanikirana, ndipo zomatira zimatha kukwaniritsa zinthu zabwino kwambiri zakuthupi. Kuonjezera apo, chifukwa chomatira chotentha chosungunuka sichigwiritsa ntchito zosungunulira za organic, malo opangirapo sadzakhala oipitsidwa, choncho amalandiridwa ndi ogwiritsa ntchito, ndipo angagwiritsidwe ntchito kwambiri pogwirizanitsa zipangizo zosiyanasiyana, makamaka kugwirizanitsa nsalu.

Zomatira zotentha za polyurethane zimasungunuka atha kugawidwa m'magulu awiri: imodzi ndi zomatira zomata za polyurethane zotentha za thermoplastic polyurethane elastomer, ndipo inayo ndi zomatira zotentha za polyurethane. Yotsirizira anawagawa chatsekedwa mtundu ndi chinyezi kuchiritsa otentha Sungunulani mtundu. Mtundu wosindikizidwa, chifukwa kutentha kwa dissociation kwa sealant ndipamwamba kwambiri mpaka 100℃ kapena zambiri, izo zichititsa thovu mu zomatira wosanjikiza, ndipo kokha ntchito yokonza mankhwala. Zomatira zamtundu wa polyurethane zomwe zimachiritsa chinyezi ndi gawo limodzi, zopanda zosungunulira, zomwe zimagwirizana ndi malamulo oteteza chilengedwe, ndizosavuta kugwiritsa ntchito, ndipo zimakhala ndi magwiridwe antchito ofanana ndi mtundu wa zosungunulira-based-reactive, kotero zimakhala zabwino. Chiyembekezo cha chitukuko.

Chinyezi cha PURking PUR chochiritsa zomatira zotentha zosungunuka zimakhala ndi ntchito yabwino kwambiri. Kuchokera mkati mwa magalimoto kupita ku mafakitale opangira mipando, imatha kupereka zapamwamba komanso zapamwambazomatira zotentha zosungunukas. Tikuyembekezera kukambirana ndi kugwirizana nanu.