He rauemi maha ngā momo pahuka ngāwari o te polyurethane e whakamahia whānuitia ana i roto i ngā momo mahi, mai i te whakaruru i ngā tāonga whare ki ngā nohoanga motuka. Ka pāngia te mahi a ēnei pahuka e te whiriwhiringa o ngā whakakorikori, e whakahaere ana i ngā tauhohenga matū matua i te wā e hangaia ana te pahuka. Kei roto i ngā tauhohenga matua ko te tauhohenga gelation (te hanganga o ngā carbamates) me te tauhohenga pahuka (te tauhohenga i waenga i te wai me ngā isocyanates, ka puta he urea me te hau). Me ata taurite ēnei tauhohenga kia hangaia te hanganga pahuka e hiahiatia ana, ahakoa he pūtau tuwhera, he pūtau kati rānei.
Kaiwhakaoho mō ngā Pahuka Ngāwari:MXC-A1 (BDMAEE)
Ko te MXC-A1, e mōhiotia ana hoki i roto i te matū ko N,N,N',N'-tetramethyl-2,2′-oxybis(ethylamine), tētahi o ngā whakakōkī amine tuatoru tino whai hua e whakamahia ana i roto i te hanga pahuka ngāwari polyurethane. He wai kore tae ki te kōwhai pakupaku, he tino kaha te mahi whakakōkī me te whiriwhiri mō te tauhohenga pahuka.MXC-A1ka whakatairanga i te tauhohenga urea (tauhohenga wai-isocyanate), he mea nui mō te hanga pahuka polyurethane ngohengohe me te pahuka mārō.
Ka taea te whakarōpū i ngā tauhohenga matua i roto i te hanga pahuka ki:
- Tauhohenga Whakapūkara:Te hanganga o ngā carbamates mā te tauhohe i ngā isocyanates me ngā rōpū hydroxyl (-OH) i roto i ngā polyols.
- Tauhohenga Huka:Ko te tauhohenga o ngā isocyanates ki te wai, ka hua ake te hanganga o te urea me ngā mirumiru hau e whakawhanui ana i te hanganga pahuka.
Te Whakataurite i te Whakapūtanga me ngā Tauhohenga Huka
Ko te angitu o te hanganga o te pahuka ngāwari—ahakoa he pūtau-tuwhera (e tuku ana i te hau kia puta) he pūtau-kati rānei (e whakarato ana i te whakamarumaru pai ake)—e whakawhirinaki ana ki te taurite i waenga i te tere o te whakakī me te tere whakawhānui o te hau. Ka whakahaerehia tēnei taurite mā te whakarerekē i te momo me te nui o ngā whakakorikori me ngā whakaū pahuka i roto i te hanganga.
He tino pai te MXC-A1 mō ngā tono pahuka pakari teitei (HR) me te hanga werohanga tauhohenga (RIM) nā tōna kaha ki te whakatere i te tauhohenga pahuka me te pupuri tonu i te mana whakahaere i te tukanga whakapūkara. Mā te whakahaere i te kukū o te whakakōkī, ka taea e ngā kaihanga te arotau i te taurite i waenga i te hanganga hau me te hanganga o te pahuka.
Ngā Whakamahinga o te MXC-A1 i roto i te Pahuka Ngāwari
He whānuitia ngā whakamahinga o te MXC-A1 ki te whakaputa i te nuinga o ngā momo pahuka polyurethane, ahakoa he nui te mahi me te whai huatanga e tino pai ana mō ngā hua pahuka ngohengohe. I roto i ngā pahuka pakari-teitei, pērā i ngā mea e whakamahia ana i roto i ngā nohoanga motuka me ngā urunga tāonga, ka whakarite te MXC-A1 i tētahi hanganga pūtau ōrite, ā, ka whakarei ake i te pakari me te whakamarie o te pahuka. He mea whakamahi noa hoki i roto i ngā hua RIM ina hiahia ngā pahuka ngāwari ki te whakatutuki i ngā āhuatanga miihini me te tinana e hiahiatia ana.
Hei whakamutunga, he mea nui ngā whakakorikori polyurethane pēnei i te MXC-A1 ki te whakatutuki i ngā āhuatanga mahi e hiahiatia ana o ngā pahuka ngāwari. Mā te whakatairanga i ngā tauhohenga pahuka me te whakakīkī nui, ka taea e rātou ngā kaihanga te whakarite i te hanganga, te pakari, me te pumau o te pahuka ki ngā hiahia tono motuhake.
Wā tuku: Hanuere-13-2025