Kua noho te rauemi whakamahana pahuka rehu hei hangarau i roto i ngā whare hou, he pai ake te whakamahana wera, te ātete hau me te ātete makuku. Kei te ngako o tēnei pūnaha whakamahana mahi-teitei ko te pahuka polyurethane, he rauemi i hangaia mā te tauhohenga matū i waenga i ngā wāhanga matua e rua: te taha "A" (he polyisocyanate te nuinga) me te taha "B", he ranunga o ngā polyol, ngā whakakorikori, ngā kai pupuhi, ngā aukati mura me ngā surfactants. He mahi nui tā ngā whakakorikori polyurethane, pērā i te MXC-BDMA me te MXC-TMA, ki te akiaki i ngā tauhohenga, te arotau i te hanganga pahuka me te whakarite i te mahi e hiahiatia ana mō ngā momo tono whakamahana.
Ngā Wāhanga o te taha "B" i roto i ngā Pūnaha Rehu Polyurethane
I roto i ngā pūnaha pahuka polyurethane rehu (SPF), kei roto i te taha "B" he whānuitanga o ngā tāpiringa e whakatau ana i te mahi o te hua whakamutunga. Kei roto i ēnei tāpiringa:
- Ngā PolyolKo ngā poraka hanga matua e tauhohe ana ki ngā isocyanates hei hanga i te polymer polyurethane.
- Ngā WhakakōkīNgā matū matū e tere ake ai te tauhohenga i waenga i ngā polyol me ngā isocyanate, kia pai ai te hanganga me te whakamaroke o te pahuka.
- Ngā Kaihoko HukaNgā matū e āwhina ana ki te waihanga i te hanganga pahuka mā te whakaputa hau i te wā o te tauhohenga.
- Ngā Ārai MuraNgā tāpiringa hei whakapai ake i te ātete ahi o te pahuka.
- Ngā matū horoiNgā matū hei whakau i te hanganga pahuka, kia ōrite ai te hanganga pūtau.
MXC-BDMABenzyl Dimethylamine Catalyst mō te Pahuka Polyurethane Pakari
Ko te MXC-BDMA (CAS 103-83-3) he whakakorikori benzyl dimethylamine e whakamahia whānuitia ana i roto i te umanga polyurethane, inā koa i roto i ngā tono pahuka mārō. He tino whai hua ki te hanga pahuka polyurethane mārō, he pai rawa ngā āhuatanga whakamahana me te hanganga pai, ā, he maha ngā wā ka whakamahia hei rehu i te whakamahana pahuka.
Ko ngā painga matua o te MXC-BDMA i roto i ngā pūnaha pahuka rehu ko:
Te whakarei ake i te rere wawe: Mā te MXC-BDMA ka mau tonu te rere pai o te ranunga polyurethane i ngā wāhanga tōmua o te tukanga pahuka, kia ngāwari ai te rere me te whakakī i ngā āputa, i ngā wāhi koretake rānei.
Hanganga pūtau ōrite: Ka whakatairangahia e te whakakorikori te hanganga o ngā mirumiru iti, ōrite i roto i te pahuka, ā, ka whakapai ake i te whakamarumaru wera me te whakarite i te pumau ā-pūkaha. Ka āwhina hoki te hanganga pūtau ōrite i te pahuka kia mau tonu te piri o te hau, ka whakapai ake i te whai huatanga o te pūngao o te whakamarumaru.
Te piri kaha ki ngā papa: Mā te MXC-BDMA ka pai ake te piri i waenga i te pahuka me ngā momo papa, pērā i te rakau, te konganuku me te raima. Mā tēnei ka piri pūmau te pahuka rehu ki te mata e whakamahia ana, ahakoa i roto i ngā taiao uaua.
MXC-TMA: Kaiwhakaoho mō ngā Pūnaha Pahuka Polyisocyanurate
Ko tētahi atu whakakorikori nui i roto i ngā pūnaha polyurethane rehu ko MXC-TMA (CAS 75-50-3), he whakakorikori e ahu mai ana i te trimethylamine e tino pai ana mō ngā pūnaha pahuka polyisocyanurate (PIR). He rite te pahuka PIR ki te pahuka polyurethane, engari he nui ake te ōwehenga o ngā isocyanates kei roto i te tauira. Mā tēnei whakarerekētanga ka nui ake te pumau o te wera me te ātete ahi ki te pahuka, ka waiho hei whiringa whānui mō ngā tono whakamahana i ngā wāhi e tino nui ana te ātete ahi.
He maha ngā huarahi matua e whai wāhi ai a MXC-TMA ki ngā pūnaha PIR:
Hototahi ki ngā pūnaha PIR: Kua arotauhia te MXC-TMA mō ngā whakatakotoranga pahuka polyisocyanurate hei akiaki i te tauhohenga me te whakarite kia maroke pai, kia ōrite hoki te pahuka.
Te ātete ahi kua whakapaitia: He pai ake te ātete o te pahuka PIR ki te mura i te pahuka polyurethane paerewa. Mā te whakamahinga o te MXC-TMA i roto i ngā hanganga PIR ka whakarei ake i tēnei āhuatanga, ka waiho hei whiringa mō ngā whakamahinga i roto i ngā taiao mura, i ngā taiao pāmahana teitei rānei.
Te hanganga pahuka pumau: He rite ki te MXC-BDMA, ka whakarite a MXC-TMA kia hanga e te pahuka he hanganga pūtau ōrite, he mea nui hoki mō te pupuri i ngā āhuatanga ārai o te rauemi mō te wā roa.
Ko ngā pahuka PIR kei roto ko te MXC-TMA e whakamahia whānuitia ana i roto i ngā tuanui arumoni, i te whakamarumaru pakitara, me ētahi atu tono whakamarumaru mahi-teitei e hiahia ana ki te whakamarumaru me te tiaki ahi.
Te Hiranga o ngā Whakakōkī i roto i te Whakamarumarutanga Pahuka Rehu
Hei whakamutunga, ko ngā whakakorikori polyurethane pēnei i te MXC-BDMA me te MXC-TMA he wāhanga matua o ngā pūnaha whakamahana pahuka rehu. Ka āwhina rātou ki te whakahaere i te tauhohenga, te whakapai ake i te rere me te ōritetanga o te pahuka, me te whakarite i te piri kaha me te pumau.
Wā tuku: Hakihea-11-2024