Raina Whakakotahi-Whakaurunga Rau Ārai Papamaha PP/PE/PA/PETG/EVOH
Tawhā Hangarau Matua
| Tauira rārangi | Tauira whakaputa | Whānui o ngā hua | Te matotoru o ngā hua | Putanga whakaputanga hoahoa |
| 7 ngā paparanga whakakotahi-tahi | 120/75/50/60/75 | 800-1200mm | 0.2-0.5mm | 500-600kg/h |
| 9 ngā paparanga whakakotahi-tahi | 75/100/60/65/50/75/75 | 800-1200mm | 0.05-0.5mm | 700-800kg/h |
Kia mōhio: Ka taea te whakarerekē i ngā whakaritenga me te kore panui i mua.
Te āhua o te mākete o ngā tono takai EVOH
I roto i te ao o ngā takai kai mekameka makariri, i whakamahia e te tangata ngā rauemi whakarewa, karāhe rānei hei takai kai hei wehe i te urunga o ngā momo hau ki roto, ki waho hoki, kia pai ai te kounga o ngā ihirangi me te uara o ngā taonga. Nā te mea e toru ngā āhuatanga matua e pā kino ai te kai: ngā āhuatanga koiora (ngā tauhohenga whākōkī koiora, me ētahi atu), ngā āhuatanga matū (te nuinga ko te waikura o ngā wāhanga kai) me ngā āhuatanga ā-tinana (te waikura, te maroke, me ētahi atu). He wāhi nui ēnei āhuatanga ki ngā āhuatanga taiao pēnei i te hāora, te mārama, te pāmahana, te makuku, me ētahi atu, e pā kino ai te kai. Ko te ārai i te pirau o te kai ko te aukati i te tipu o ngā moroiti i roto i te kai, te ārai i te waikura o ngā wāhanga kai e te hāora, me te ārai i te makuku me te pupuri i te reka taketake o te kai.
Ko te Ethylene-vinyl alcohol copolymer, e kiia nei ko EVOH, e mōhiotia ana ko ngā kapia ārai nui rawa atu e toru o te ao me te polyvinylidene chloride (PVDC) me te polyamide (PA) [2]. Ka taea e EVOH te aukati nui i te urunga o te hāora ki te hau ki roto i te kai, ā, ka aukati i te whakaputanga o ngā paitini me ētahi atu matū kino nā te tipu haere o ngā moroiti, ā, ka taea hoki te aukati i ngā huringa hanganga i puta mai i te waikura, me te pupuri tonu i te kakara me te aukati i te parahanga kakara o waho. I tua atu, ka taea te whakakapi i te korenga o ngā āhuatanga ārai makuku e ētahi atu paparanga polyolefin. Nō reira, ka taea e ngā rauemi takai paparanga maha EVOH te aukati i te pirau o te kai me te whakaroa i te roa o te wā e mau ana. Hei tāpiri, he ngāwari ki te tukatuka me te hanga, ā, he pai te mahi tiaki taiao. Nā te pai o ngā āhuatanga ārai hau, te māramatanga, te kaha ki te tukatuka me te ātete whakarewa o te kapia EVOH, kei te whānui haere ngā mara tono, ā, kei te tere haere te tipu o te tono.
Te kapia ārai teitei EVOH
1. Ngā āhuatanga rauemi
Ngā Āhuatanga Ārai o EVOH Ko ngā āhuatanga ārai o ngā rauemi polymer e pā ana ki te kaha tiaki o ngā hua ki ngā hau ngota iti, ngā wai, te mamaoa wai, me ētahi atu. Ko ngā momo kapia e whakamahia whānuitia ana me ngā āhuatanga ārai pai ko: EVOH, PVDC, PAN, PEN, PA me PET.
2. Ina whakamahia te EVOH hei rauemi ārai teitei, ka whakamahia he hanganga hiato maha-paparanga. Ko ngā rauemi hiato e whakamahia whānuitia ana ko: PP, HIPS, PE, EVOH, AD, ā, ko AD te piripiri i roto i te hanganga. Ka taea e te hanganga hiato maha-paparanga te whakamahi katoa i ngā āhuatanga o ia rauemi, te whakapai ake i te ātete wai o te EVOH, me te whiwhi i tētahi rauemi ārai teitei me ngā āhuatanga whānui tino pai. Ko te nuinga o ēnei i whakamahia i roto i ngā takai ngāwari i mua, engari ko ngā kapia hiato pēnei i te PP, PE, me te PA kāore i te ngāwari ki te werohia nā te pai o te pakari me te ngoikore o te pakari, e whakawhāiti ana i tā rātou tono i roto i te mara o te takai pakari, inā koa i roto i ngā hua whakakī ipurangi. He pai te pakari o te polystyrene ātete-pānga HIPS me ngā āhuatanga hanga pai, he pai mō te werohia me te pai mō ngā rauemi takai pakeke. Nō reira, he mea nui kia kaha te whakawhanake i ngā rauemi hiato ārai teitei EVOH e tika ana mō te takai pakeke.
Nā te ngoikore o te hototahitanga i waenga i te kapia EVOH me te kapia HIPS, me te rerekētanga nui o te tere rheology o te kapia, te kaha here i waenga i te papa me te EVOH, ngā whakaritenga mō ngā āhuatanga kume o EVOH i te wā o te hanga tuarua, me te tohatoha paparanga EVOH i te wā o te maramataka hei whakaputa pepa hiato, ko te ōritetanga o ngā rauemi hiato he take matua katoa e pā ana ki te mahi me te whakamahinga o ngā rauemi hiato, ā, he raruraru uaua hoki me whakatau i te wā e whakaputa ana i tēnei momo rauemi hiato.
Ko te mea nui ki te hangarau whakakotahi paparanga maha ko te piripiri (AD). Ko ngā rauemi takai whakakotahi o EVOH he PPEVOH te tikanga, engari kāore e taea te hono tika i te PP me te EVOH ki te wera, ā, me tāpiri he piripiri (AD) i waenganui i te PP me te EVOH. I te wā e whiriwhiri ana i te piripiri, me whakaaro ki te piripiri o te PP hei rauemi turanga, ko te tuarua ko te whakataurite i te matotoru rewa o te PP me te EVOH, ā, ko te tuatoru ko te whakaritenga o ngā āhuatanga kume, kia kore ai e wehea i te wā tukatuka tuarua. Nō reira, ko ngā pepa whakakotahi he pepa whakakotahi paparanga e rima (PPADEVOHADPP). /AD/EVOH/AD/R/PP, ko te paparanga o waho ko te rauemi hou PP, ā, ko ngā paparanga e rua atu ko te rauemi hangarua PP i kuruhia R(PP). Ka taea hoki te whakamahi i te hanganga kore-taurite, ā, ka taea te tāpiri i ētahi atu rauemi (PE/HIPS, me ētahi atu) hei whakakotahi. He rite tonu te kaupapa, ā, ka taea te whakatutuki i te tikanga whakakotahi paparanga maha.
Tono
He pai ngā āhuatanga ārai o te rauemi EVOH. Mā te hangarau whakaputa-tahi me te PP, PE, PA, PETG me ētahi atu rauemi, ka taea te tukatuka hei rauemi takai mama ārai-teitei 5-paparanga, 7-paparanga, me te 9-paparanga, e whakamahia ana i roto i ngā takai ārai-teitei, ngā inu tiēre, ngā hua miraka, ngā takai ika me ngā hua mīti matao me ētahi atu. I roto i te taha kore-kai, e whakamahia ana i roto i ngā rongoā, ngā takai whakarewa pūngoi me ētahi atu mara, me ngā āhuatanga ārai tino pai, e whakapai ake ana i te roa o te oranga o ngā hua.
