Te whakarite me ngā āhuatanga o te pahuka mārō-haurua o te polyurethane mō ngā puringa waka mahi teitei.
He wāhanga nui o te kāpata te okiokinga ringa i roto i te motuka, e pana ana, e kukume ana i te tatau, e whakanoho ana hoki i te ringa o te tangata i roto i te motuka. Mēnā he āhuatanga ohorere, ina tukinga te motuka me te kakau, ka taea e te kakau ngohengohe polyurethane me te PP whakarerekētia (polypropylene), ABS (polyacrylonitrile - butadiene - styrene) me ētahi atu kakau kirihou mārō te whakarato i te ngāwari me te ārai pai, ā, ka whakaiti i te whara. Ka taea e ngā kakau pahuka ngohengohe polyurethane te whakarato i te pai o te ahua o te ringa me te kakano mata ataahua, ā, ka whakapai ake i te whakamarie me te ataahua o te kokopiti. Nō reira, me te whanaketanga o te umanga motuka me te whakapai ake i ngā hiahia o te tangata mō ngā rauemi o roto, kei te kitea haere ngā painga o te pahuka ngohengohe polyurethane i roto i ngā kakau motuka.
E toru ngā momo ringaringa ngohengohe polyurethane: te pahuka pakari teitei, te pahuka kiri-ake, me te pahuka āhua-pakari. Ko te mata o waho o ngā ringaringa pakari teitei he kiri PVC (polyvinyl chloride), ā, ko te roto he pahuka pakari polyurethane. He ngoikore te tautoko o te pahuka, he iti te kaha, ā, kāore i te rawaka te piri i waenga i te pahuka me te kiri. He paparanga matua pahuka te ringaringa kiri-ake, he iti te utu, he teitei te taumata whakauru, ā, he whānui te whakamahinga i roto i ngā waka arumoni, engari he uaua ki te whakaaro ki te kaha o te mata me te whakamarie whānui. Ko te okiokinga ringa āhua-pakari kua hipokina ki te kiri PVC, he pai te pa me te āhua o te kiri, ā, he pai te ahua o te pahuka āhua-pakari o roto, he ātete ki te pānga, he mimiti kaha, he ātete ki te koroheketanga, nō reira he whānui te whakamahinga i roto i te whakamahinga o roto o ngā waka pāhihi.
I roto i tēnei tuhinga, ka hoahoatia te tauira taketake o te pahuka polyurethane mārō-haurua mō ngā ringaringa motuka, ā, ka rangahauhia tōna whakapainga i runga i tēnei kaupapa.
Wāhanga whakamātautau
Rauemi mata matua
Polyether polyol A (uara hydroxyl 30 ~ 40 mg/g), polymer polyol B (uara hydroxyl 25 ~ 30 mg/g): Wanhua Chemical Group Co., LTD. MDI whakarerekētia [diphenylmethane diisocyanate, w (NCO) he 25%~30%], whakakorikori hiato, kaiwhakamakuku (Kaihoko 3), antioxidant A: Wanhua Chemical (Beijing) Co., LTD., Maitou, me ētahi atu; Kaiwhakamakuku (Kaihoko 1), kaiwhakamakuku (Kaihoko 2): Byke Chemical. Ko ngā rauemi mata o runga ake nei he kounga ahumahi. Kiri arai PVC: Changshu Ruihua.
Ngā taputapu matua me ngā taputapu
Mīhini whakaranu tere-teitei momo Sdf-400, taurite hiko momo AR3202CN, pokepokea konumohe (10cm×10cm×1cm, 10cm×10cm×5cm), oumu pupuhi hiko momo 101-4AB, mīhini kume hiko whānui momo KJ-1065, whakamahana wera momo 501A.
Te whakarite i te tātai taketake me te tauira
Kei te Ripanga 1 te whakatakotoranga taketake o te pahuka polyurethane āhua-pakari.
Te whakarite i te tauira whakamātautau āhuatanga ā-pūkaha: i whakaritea te polyether hiato (rauemi A) kia rite ki te tauira hoahoa, i konatunatua ki te MDI kua whakarerekētia i roto i tētahi ōwehenga, i whakaohokia ki tētahi taputapu whakaoho tere-teitei (3000r/min) mō te 3~5 hēkona, kātahi ka ringihia ki roto i te pokepokea ai hei pahuka, ā, i whakatuwheratia te pokepokea ai i roto i tētahi wā kua whakaritea hei tiki i te tauira pahuka polyurethane āhua-pakari.
Te whakarite i te tauira mō te whakamātautau mahi hononga: ka whakatakotoria he paparanga kiri PVC ki te mata o raro o te pokepokea ai, ā, ka konatunatua te polyether kua whakakotahitia me te MDI kua whakarerekētia kia rite te ōwehenga, ka whakaohokia e te taputapu whakaoho tere-teitei (3 000 r/min) mō te 3~5 hēkona, kātahi ka ringihia ki te mata o te kiri, ā, ka kati te pokepokea ai, ā, ka pokepokea ai te pahuka polyurethane me te kiri i roto i tētahi wā kua whakaritea.
Whakamātautau mahi
Ngā āhuatanga mīhini: 40%CLD (pakeke pēhanga) e ai ki te whakamātautau paerewa ISO-3386; Ka whakamātauhia te kaha kume me te roa i te whatinga e ai ki te paerewa ISO-1798; Ka whakamātauhia te kaha haehae e ai ki te paerewa ISO-8067. Mahi here: Ka whakamahia te mīhini kume hiko whānui hei tihore i te kiri me te pahuka 180° e ai ki te paerewa o te OEM.
Te mahi koroheketanga: Whakamātauria te ngaronga o ngā āhuatanga miihini me ngā āhuatanga here i muri i te 24 hāora o te koroheketanga i te 120℃ e ai ki te pāmahana paerewa o te OEM.
Ngā hua me te kōrero
Āhuatanga mīhini
Mā te whakarerekē i te ōwehenga o te polyether polyol A me te polymer polyol B i roto i te tātai taketake, i tūhuratia te awe o ngā horopeta polyether rerekē ki ngā āhuatanga ā-pūkaha o te pahuka polyurethane āhua-pakari, e whakaaturia ana i te Ripanga 2.
E kitea ana i ngā hua o te Ripanga 2 ko te ōwehenga o te polyether polyol A ki te polymer polyol B he pānga nui ki ngā āhuatanga ā-pūkaha o te pahuka polyurethane. Ina piki ake te ōwehenga o te polyether polyol A ki te polymer polyol B, ka piki ake te roa i te wā whati, ka heke te pakeke pēhi ki tētahi taumata, ā, kāore e nui te rerekētanga o te kaha kume me te kaha haehae. Ko te mekameka ngota o te polyurethane he wāhanga ngohengohe me te wāhanga mārō, te wāhanga ngohengohe mai i te polyol me te wāhanga mārō mai i te here carbamate. I tētahi taha, he rerekē te taumaha ngota whanaunga me te uara hydroxyl o ngā polyol e rua, i tētahi atu taha, ko te polymer polyol B he polyer polyol kua whakarerekētia e te acrylonitrile me te styrene, ā, ka pai ake te pakari o te wāhanga mekameka nā te noho o te mowhiti benzene, ko te polymer polyol B kei roto i ngā matū ngota iti, e whakanui ana i te pakarukaru o te pahuka. Ina 80 ngā wāhanga o te polyether polyol A, ā, 10 ngā wāhanga o te polymer polyol B, ka pai ake ngā āhuatanga ā-pūkaha whānui o te pahuka.
Āhuatanga here
Hei hua e tere ana te pēhi, ka tino whakaitihia e te kakau te whakamarie o ngā wāhanga mena ka pakaru te pahuka me te kiri, nō reira me whai kaha te hononga o te pahuka polyurethane me te kiri. I runga i ngā rangahau o runga ake nei, i tāpirihia ngā momo whakamarara makuku hei whakamātautau i ngā āhuatanga piri o te pahuka me te kiri. Kei te Ripanga 3 ngā hua.
Ka kitea i roto i te Ripanga 3 he pānga mārama o ngā momo whakamarara makuku ki te kaha tihore i waenga i te pahuka me te kiri: Ka puta te hinga o te pahuka i muri i te whakamahinga o te tāpiri 2, ka puta pea tēnei i te nui o te whakatuwheratanga o te pahuka i muri i te tāpiritanga o te tāpiri 2; I muri i te whakamahinga o ngā tāpiri 1 me te 3, ka piki ake te kaha tihore o te tauira kau, ā, ko te kaha tihore o te tāpiri 1 he 17% teitei ake i te tauira kau, ā, ko te kaha tihore o te tāpiri 3 he 25% teitei ake i te tauira kau. Ko te rerekētanga i waenga i te tāpiri 1 me te tāpiri 3 te take matua o te rerekētanga o te makuku o te rauemi hiato i runga i te mata. I te nuinga o te wā, hei aromatawai i te makuku o te wai i runga i te totoka, he mea nui te koki whakapā hei ine i te makuku o te mata. Nō reira, i whakamatautauria te koki whakapā i waenga i te rauemi hiato me te kiri i muri i te tāpiritanga o ngā whakamarara makuku e rua i runga ake nei, ā, i whakaaturia ngā hua i roto i te Pikitia 1.
E kitea ana i te Pikitia 1 ko te koki whakapā o te tauira kau te mea nui rawa atu, arā, ko te 27°, ā, ko te koki whakapā o te kaiāwhina 3 te mea iti rawa atu, arā, ko te 12° anake. E whakaatu ana tēnei mā te whakamahi i te tāpiri 3 ka taea te whakapai ake i te mākū o te rauemi hiato me te kiri ki te whānuitanga nui ake, ā, he māmā ake te horapa ki te mata o te kiri, nō reira ko te whakamahinga o te tāpiri 3 te mea tino kaha ki te tihore.
Taonga tawhito
Ka pēhia ngā hua pupuri ringa i roto i te motuka, he teitei te auau o te pānga o te rā, ā, ko te mahi tawhito tētahi atu mahi nui me whai whakaaro ki te pahuka pupuri ringa polyurethane haurua-pakari. Nō reira, i whakamatautauria te mahi tawhito o te tauira taketake, ā, i whakahaerehia he rangahau whakapai ake, ā, i whakaaturia ngā hua ki te Ripanga 4.
Mā te whakatairite i ngā raraunga i te Ripanga 4, ka kitea kua tino heke ngā āhuatanga ā-pūkaha me ngā āhuatanga here o te tauira taketake i muri i te pakeketanga wera i te 120℃: i muri i te pakeketanga mō te 12 hāora, ko te ngaronga o ngā āhuatanga rerekē engari ko te mātotoru (koia anō kei raro nei) he 13%~16%; Ko te ngaronga mahi o te pakeketanga 24 hāora he 23%~26%. E tohuhia ana kāore i te pai te āhuatanga pakeketanga wera o te tauira taketake, ā, ka taea te whakapai ake i te āhuatanga pakeketanga wera o te tauira taketake mā te tāpiri i te akomanga A o te antioxidant A ki te tauira. I raro i ngā āhuatanga whakamātautau ōrite i muri i te tāpiritanga o te antioxidant A, ko te ngaronga o ngā āhuatanga rerekē i muri i te 12 hāora he 7%~8%, ā, ko te ngaronga o ngā āhuatanga rerekē i muri i te 24 hāora he 13%~16%. Ko te hekenga o ngā āhuatanga ā-pūkaha te take matua o te raupapa o ngā tauhohenga mekameka i puta mai i te pakaru o te here matū me ngā rauropi kore utu hohe i te wā o te pakeketanga wera, ka hua ake he huringa taketake i roto i te hanganga, i ngā āhuatanga rānei o te matū taketake. I tētahi taha, ko te hekenga o te mahi here i ahu mai i te hekenga o ngā āhuatanga ā-pūkaha o te pahuka tonu, i tētahi atu taha, nā te mea he nui ngā mea hanga kirihou kei roto i te kiri PVC, ā, ka heke te mea hanga kirihou ki te mata i te wā o te tukanga koroheketanga hāora wera. Mā te tāpiri i ngā antioxidants ka taea te whakapai ake i ōna āhuatanga koroheketanga wera, nā te mea ko te nuinga ka taea e ngā antioxidants te whakakore i ngā rauropi kore utu hou, te whakaroa, te aukati rānei i te tukanga waikura o te polymer, kia mau tonu ai ngā āhuatanga taketake o te polymer.
Mahi whānui
I runga i ngā hua o runga ake nei, i hangaia te tauira tino pai, ā, i aromatawaihia ōna āhuatanga rerekē. I whakaritea te mahi a te tauira ki te pahuka ringaringa polyurethane whānui e ātete ana ki te pikinga. Kei te Ripanga 5 ngā hua.
E kitea ana i te Ripanga 5, he pai ake te mahi a te tauira pahuka polyurethane tino pakari i ngā tauira taketake me ngā tauira whānui, ā, he pai ake te whakamahi i ngā ringaringa mahi-teitei.
Whakamutunga
Mā te whakarerekē i te nui o te polyether me te whiriwhiri i te kaiwhakamakuku me te antioxidant e tika ana, ka taea te hoatu ki te pahuka polyurethane āhua-pakari ngā āhuatanga miihini pai, ngā āhuatanga tawhito wera pai, me ērā atu mea. I runga i te mahi pai o te pahuka, ka taea te whakamahi i tēnei hua pahuka polyurethane āhua-pakari teitei ki ngā rauemi ārai motuka pēnei i ngā ringaringa me ngā tēpu taputapu.
Wā tuku: Hurae-25-2024