I ngā tau tata nei, kua nui te nekehanga o te umanga pahuka polyurethane ki ngā otinga pumau me te hoa-taiao. I roto i ēnei, ko ngā pūwero pupuhi hydrofluorolefin (HFO) te mea tino auaha, inā koa i roto i ngā pahuka rehu pūtau-kati. Kei te whānuitia te whakamahi i ngā pūwero huka HFO hei huarahi pai ki te taiao hei whakakapi i ngā pūwero huka hydrofluorocarbon (HFC) tuku iho i roto i ngā tono pahuka rehu polyurethane.
Te Mārama ki ngā Kaihoko Huka HFO
Ko te HFO, he whakarāpopototanga mō te hydrofluorolefin, he matū i hangaia mai i te hauwai, te fluorine, me ngā ngota waro he rite ki te HFCS engari he hanganga ahurei tōna e whakaiti ana i te pānga ki te taiao. Kāore i rite ki te HFC, kāore he kaha whakaiti ozone (ODP) a te HFO, ā, he iti hoki te kaha whakamahana ā-ao (GWP). He iti ake te pānga o te HFO ki te whakamahana ā-ao nā te poto o tōna oranga hau, nō reira he kōwhiringa pahuka rehu tino pai ki te taiao. Mā te whakauru i ngā kaihoko pahuka HFO ki te hanga pahuka rehu, ka taea e ngā kaihanga me ngā kaiwhakamahi mutunga te tautoko i tētahi taiao hauora ake me te whai i ngā ture ā-ao e aro ana ki te whakaiti i ngā tukunga kino.
Ngā Painga Matua o te HFO i roto i ngā Pahuka Rehu
Haunga te iti o te GWP me te kore ODP, he maha atu anō ngā āhuatanga pai o ngā HFO:
- Te iti o te kawe hiko:Nā tēnei āhuatanga i pai ai ngā pahuka rehu HFO mō te whakamahana i ngā wāhi tata ki ngā taputapu hiko me ngā waea.
- Kore-Mumura:Kāore e mura ngā pahuka HFO, ā, ka nui ake te haumaru o ngā hanganga e whakamahi ana i tēnei whakamarumaru.
- Kore-paitini, iti hoki te piki me te heke:Kāore he matū waro mimiti (VOC) i roto i ngā kaihoko pahuka HFO, ā, ka āwhina tēnei ki te whakapai ake i te kounga o te hau o roto, me te whakaiti i ngā mōrearea hauora e pā ana ki te hau matū mai i waho.
- Te Whakatutukitanga Taiao:Kei te piki haere te kaha o te tautoko a ngā HFO i ngā ture taiao, ā, he mea pai ake ēnei mō ngā mahi hanga whare pumau.
Ngā Whakakōkī Polyurethanei roto i ngā pahuka rehu HFO
Ngā whakakorikori polyurethaneHe mea nui te mahi a ēnei ki te whakapai ake i te mahi me te whai huatanga o ngā pahuka rehu HFO. Ka āwhina rātou ki te whakahaere i te tere o te tauhohenga i waenga i te isocyanate me ngā polyol, kia tika ai te whakamaroke o te pahuka, kia tutuki ai te matotoru me ngā āhuatanga ārai e hiahiatia ana. He maha ngā wā ka tīpakohia ngā whakakorikori e whakamahia ana me te HFO mō tō rātou hototahi ki ngā kaihoko pupuhi iti-tukunga, ka hua ake he hononga whai hua, he whakamaroke tere, me te pumau hanganga mō te wā roa.
Whakamutunga
Hei kaiwhakarato o ngā whakakorikori polyurethane, e mōhio ana mātou ki te hiranga o te tautoko i ngā whanaketanga e pai ana ki te taiao. Ko te whakamahi i ngā kaihoko pahuka HFO i roto i ngā pahuka rehu ehara i te mea ka tutuki noa i ngā whāinga pumau o te ao engari ka whakarei ake hoki i ngā āhuatanga mahi e kore e taea e ngā pahuka HFC tuku iho te tuku. Mā te huri ki ngā pahuka rehu e hangai ana ki te HFO me ngā pūnaha whakakorikori kua arotauhia, ka taea e ngā ahumahi te whakaiti i ō rātou tapuwae taiao me te whakatutuki i ngā paerewa teitei o te whakamarumaru me te pakari.
Wā tuku: Whiringa-ā-rangi 11-2024