He rauemi whakamahana maha-whakamahinga, tino whai hua hoki te whakamahana pahuka rehu, i hangaia mai i te tauhohenga matū o ngā wāhanga matua e rua (te kapia polyol me te isocyanate). Ina honoa, ka tauhohe ngā rauemi e rua hei hanga i te pahuka polyurethane whānui e hiri ana, e ārai ana hoki i ngā mata. Nā te pikinga o te hiahia mō te whakamahana mahi-teitei mō ngā tono kāinga, arumoni me ngā mahi ahumahi kua piki ake te whakamahinga o te whakamahana pahuka rehu me te whakamarumaru pai, te ātete ki te makuku me te tautoko hanganga.
Te Hanganga o te Whakamarumaru Pahuka Rehu
Ko te hanga o te whakamahana pahuka rehu e whakawhirinaki nui ana ki te taunekeneke i waenga i ngā polyol me ngā isocyanate, e whānui ana ki te whakakī i te wāhi, ā, e whakapakeke ana hei pahuka whakamahana i muri i te rehu. Heoi, me whakahaere tika tēnei tukanga kia tika ai te matotoru, te hanganga me te ōritetanga o te pahuka. I konei, ko tewhakakorikori polyurethanehe mahi nui tāna ki te ārahi me te whakahaere i te tauhohenga.
Te Tūranga o ngā Kaikōkiri i roto i te Hanga Pahuka Polyurethane
He mea nui ngā kaiwhakaoho i roto i te hanga polyurethane nā te mea ka whakanui ake i te tere o te tauhohenga me te whakahaere i te wā tiēre, he mea nui tēnei mō te whakatutuki i te whānui pai o te pahuka. Ka taea hoki e te kaiwhakaoho te whakahaere i ngā tauhohenga tuarua, pērā i te tauhohenga wai, e tuku ana i te hau e hiahiatia ana hei tīmata i te mirumiru. He mea nui te taurite i waenga i ēnei tauhohenga mō te hanga hanganga pahuka ōrite me te hanganga pūtau me ngā āhuatanga ōrite. I roto i te hanga polyurethane, ka wehea ngā kaiwhakaoho kia rua ngā wāhanga:ngā whakakorikori aminemengā whakakorikori organometallic(pērā i te organotin, te bismuth, me te konutea).
MXC-TMA me MXC-BDMA: Ngā Whakakōkī mō te Whakamarumarutanga Pahuka Rehu
Ngā WhakakōkīMXC-TMAmeMXC-BDMAhe mārama ngā painga i roto i te hanga o te whakamahana pahuka rehu.MXC-TMAHe wai kore tae ki te kōwhai mārama e whakatairanga ana i te whakatītaha o te polyisocyanurate hei hanga i tētahi pihi piki ōrite me te whakahaere. He whānuitia te whakamahinga o te whakakorikori i roto i ngā pahuka pakari e hiahia ana kia pai ake te rere me te whakamaroke tonu, ā, he kōwhiringa pai mō ngā tono whakamahana e hiahia ana kia pono te hanganga.
I tētahi atu taha,MXC-BDMAKo te (N, N-dimethylbenzylamine, nama CAS 103-83-3) he whakakorikori benzyldimethylamine e whakamahia whānuitia ana i roto i ngā tono pahuka mārō. Ka whakarei ake i te rere wawe o te pahuka, ka hanga i ngā kōhao mirumiru ōrite, ā, ka whakarite i te hononga kaha ki te papa. Nā tēnei ka pai te MXC-BDMA mō ngā whakaritenga whakamahana mahi teitei i roto i ngā tono pahuka rehu, he mea nui te hanganga pahuka pumau, pakari me te piri.
Whakamutunga
He mea nui ngā whakakōkī polyurethane pērā i te MXC-TMA me te MXC-BDMA mō te whakatutuki i te kounga o ngā rauemi whakamahana pahuka rehu. Mā ō rātou āhuatanga ahurei ka taea te whakahaere tika i te hanganga pahuka, kia tika ai te mahi whakamahana i roto i ngā momo tono. I te mea kei te tipu haere tonu te hiahia mō ngā otinga whakamahana penapena-pūngao, kei te whai wāhi nui tonu ngā whakakōkī polyurethane matatau ki te whakarato i te whakamahana pahuka rehu kounga teitei, pakari hoki.
Wā tuku: Whiringa-ā-rangi-06-2024