Polyurethane Yesigcilikisha: Izici kanye Ukucaciswa

Polyurethane glue kuyinto into kokuba eziningi kokufaneleka. Chief phakathi kwabo kukhona yokusebenza kwalo ngezindlela eziningi. Ingasetshenziselwa ngoba gluing amatshe, evele of ingilazi, metal, izinkuni, ngobumba, polyurethane kanye polystyrene, kanye eziningi nezinye izinto. Lokhu kungenxa adhesion eliphezulu ukwakheka kwazo zonke lezi zinhlobo izinto. Njengoba isibopho ke ikhonza polyurethane, ukuthi kucacile isihloko.

Compound ngosizo yayo evele kuqinisekisa ukumelana namakhemikhali, lokushisa ukweqisa, ehlasela izici ezihlukahlukene imvelo, amazinga okushisa aphakeme kanye umswakama. ekhuthaza ababhekene nesimo esinje kungabaduduza eqhutshwa ububanzi lokushisa uhla kusuka -60 kuya +120 degrees Celsius. Ngaphezu kwalokho, polyurethane ingcina ihlinzeka uxhumano eqinile, uzinzile emiphumeleni ezinjengokungcoliswa isikhunta nesikhunta pathogenic. podvspenivaniya impahla ikuvumela ukuba uqinisekise ukuthi isikhala phakathi evele kunenze nisondelane niye nagcwaliswa ngokuphelele kubo. Ukungabi kuleli kumakhemikhali awuketshezi nephunga iqinisekisa ukuphepha esiphezulu ngesikhatsi kokuhlinzwa.

Kukhona ezimbili ingxenye nokukodwa-ingxenye polyurethane ingcina. Indlela yesibili kulula ukuyisebenzisa futhi Ukusebenziseka okukhulu. Ngo oyiyo kukhona prepolymers isocyanate. Ngenxa viscosity eliphezulu umkhiqizo inikeza kakhulu setting kokuqala. ukusabela isocyanate umswakama asemkhathini kuholela ukusabela zamakhemikhali. yi Its kumiswa izibopho cross-yamangqamuzana, ukuze uxhumano iba namandla khulu.

Two-ingxenye polyurethane ingcina iqukethe e oyiyo ambalwa izingxenye okuyinto lapho esetshenziswa kuphela abe viscosity ongaphakeme. Kuphela emva kuhlangana mechanical wenziwa kwakwakhe isocyanate kanye ejenti polyol elapha, eliphumela isimo zokusebenza Yesigcilikisha. Hlanganisa izakhi ezidingekayo nokugcina ngokucophelela izimo ezithile inqubo, isb olinganise oyifunayo, ubude besikhathi kanye lokushisa. Lapho inqubo nokuxhumana izingxenye indlela efanele. Elandela zonke izimo kuholela yokuthi izici ngamandla uxhumano esebenzisa polyurethane ingcina uphakeme kakhulu.

Glue esekelwe polyurethane kungaba usizo olukhulu ebeka amapulangwe aphansi phansi. Kwezimo Russian kunconywa ukusebenzisa ukwakhiwa ezimbili-ingxenye ukuthi awanalo kumakhemikhali awuketshezi noma amanzi. izingoma ezinjalo bayakwazi ukumelana noma yimuphi umthwalo yokusebenza cishe, ngakho kufanele sisetshenziselwe ebeka ebhodini noma afanayo. I ingcina polyurethane singasebenza cishe zonke izinhlobo elisekela ngaphandle kokudinga priming ukuthethwa kwecala. Izinsalela uhlelo ukususa nje ngokwanele. Polyurethane ingcina oluqinisekisa namandla high phuca.