NGĀ Elastomers TOP 5 mō ngā tono Gasket me te Hiri
He aha ngā elastomers? I ahu mai te kupu i te kupu "elastic" - tētahi o ngā āhuatanga matua o te rapa. Ko ngā kupu "rapa" me te "elastomer" e whakamahia ana hei tohu i ngā polymers he viscoelasticity - e kiia ana ko te "elasticity". Ko ngā āhuatanga ā-roto o ngā elastomers ko te ngāwari, te roa teitei me te huinga o te manawanui me te whakamātao (ko te whakamātao he āhuatanga o te rapa e meinga ai ia kia huri i te pūngao miihini ki te wera ina pāngia e te piko). Mā tēnei huinga āhuatanga ahurei ka waiho ngā elastomers hei rauemi pai mō ngā gaskets, ngā hiri, ngā isolats, me ērā atu mea.
I roto i ngā tau, kua neke te hanga elastomer mai i te rapa maori i puta mai i te rapa rākau ki ngā momo rapa hangai kua tino hangaia. I te hanga i ēnei momo, ka tutukihia ngā āhuatanga motuhake mā te awhina o ngā tāpiringa pēnei i ngā whakakī, ngā mea hanga kirihou rānei, mā te rerekētanga o ngā ōwehenga ihirangi i roto i te hanganga copolymer rānei. Ko te whanaketanga o te hanga elastomer ka hangaia he maha ngā mea ka taea te hanga, te hanga me te wātea i roto i te mākete.
Hei whiriwhiri i te rauemi tika, me tirotiro tuatahi ngā paearu whānui mō te mahi a te elastomer i roto i ngā tono gasket me te hiri. I te wā e whiriwhiri ana i tētahi rauemi whai hua, he maha ngā āhuatanga me whai whakaaro ngā miihini. Me āta whakaaro ki ngā āhuatanga ratonga pēnei i te awhe pāmahana whakahaere, ngā āhuatanga taiao, te whakapā matū, me ngā whakaritenga miihini, ā-tinana rānei. I runga i te tono, ka pā nui ēnei āhuatanga ratonga ki te mahi me te roanga o te ora o tētahi gasket, hiri rānei a te elastomer.
Me ēnei ariā i roto i te hinengaro, kia tirohia e tātou ētahi o ngā elastomers e rima e whakamahia whānuitia ana mō ngā tono gasket me te hiri.
1)Buna-N/Nitrile/NBR
He kupu ōrite katoa tēnei, ā, he mea rongonui tēnei rapa hangai copolymer o te acrylonitrile (ACN) me te butadiene, te rapa Nitrile butadiene (NBR) rānei, e whakahuatia ana i te wā e kitea ana te penehīni, te hinu me/ngā hinu rānei.
Ngā Āhuatanga Matua:
Te Awhe Pāmahana Mōrahi mai i ~ -54°C ki te 121°C (-65° – 250°F).
He tino pai te ātete ki ngā hinu, ngā whakarewa me ngā wahie.
He ātete pai ki te pakū, te rere makariri, te ātete ki te haehae.
He pai ake mō ngā tono me te Hauota, te Hēriuma rānei.
Kāore i te tino ātete ki te UV, te ozone, me te huarere.
He ātete ngoikore ki ngā ketone me ngā warowaihā whai hauota.
Ko te mea tino whakamahia i roto i:
Ngā Taupānga Whakahaere Wahie Rererangi me te Motuka
Utu Whakatairanga:
Iti ki te Waenga
2) EPDM
Ka tīmata te hanganga o te EPDM mā te whakakotahitanga o te ethylene me te propylene. Ka tāpirihia he monomer tuatoru, he diene, kia taea ai te whakamomona i te rauemi ki te whanariki. Ko te matū ka puta ko te ethylene propylene diene monomer (EPDM).
Ngā Āhuatanga Matua:
Te Awhe Pāmahana Mōrahi mai i ~ -59°C ki te 149°C (-75° – 300°F).
He ātete pai ki te wera, te ozone me te huarere.
He ātete pai ki ngā matū porotaka me te mamaoa.
He tino pai ngā āhuatanga ārai hiko.
He ātete pai ki ngā ketone, ki ngā waikawa waimeha noa, me ngā kawakore.
Kāore i te tino ātete ki te hinu, te penehīni, me te hinu kōhinu.
He ātete ngoikore ki ngā hauwaiwai aliphatic, ngā whakarewa halogenated, me ngā waikawa kukū.
Te nuinga o te wā e whakamahia ana i roto i:
Ngā Taiao Pouaka Whakamātao/Rūma Matao
Pūnaha Whakamatao Waka me ngā Taupānga Whakakore-Huarere
Utu Whakatairanga:
Iti – Waenga
3) Neoprene
Ka hangaia te whānau neoprene o ngā rapa hangai mā te whakapūhuitanga o te chloroprene, ā, e mōhiotia ana hoki ko te polychloroprene, ko te Chloroprene rānei (CR).
Ngā Āhuatanga Matua:
Te Awhe Pāmahana Mōrahi mai i ~ -57°C ki te 138°C (-70° – 280°F).
He āhuatanga tino pai mō te ātete ki te pānga, te korokoro me te mura.
He pai te ātete haehae me te huinga pēhanga.
Ātete wai tino pai.
He ātete pai ki te pānga taurite ki te ozone, te UV, me te huarere, tae atu ki ngā hinu, ngā hinu whakangao me ngā whakarewa ngawari.
Kāore i te tino ātete ki ngā waikawa kaha, ki ngā whakarewa, ki ngā esters, me ngā ketones.
Kāore i te tino ātete ki ngā warowaihā kua whakapūkaratia ki te hauota, ki te kakara, me te nitro-waihāokawa.
Te nuinga o te wā e whakamahia ana i roto i:
Ngā Taupānga Taiao Wai
Hikohiko
Utu Whakatairanga:
Iti
4) Hiraka
Ko ngā rapa silicone he vinyl methyl polysiloxanes polymer-teitei, e tohua ana ko (VMQ), e tino pai ana te mahi i roto i ngā taiao wera uaua. Nā te parakore, he tino pai ngā rapa silicone mō ngā mahi akuaku.
Ngā Āhuatanga Matua:
Te Awhe Pāmahana Mōrahi mai i ~ -100°C ki te 250°C (-148° – 482°F).
He ātete tino pai ki te pāmahana teitei.
He ātete tino pai ki te UV, te ozone me te huarere.
E whakaatu ana i te ngāwari pai rawa atu ki te pāmahana iti o ngā rauemi kua whakarārangihia.
Ngā āhuatanga dielectric tino pai.
He ngoikore te kaha kume me te ātete haehae.
Kāore i te tino ātete ki ngā whakarewa, ngā hinu, me ngā waikawa kukū.
Kāore i te pai te ātete ki te mamaoa.
Te nuinga o te wā e whakamahia ana i roto i:
Ngā Taupānga Kai me te Inu
Ngā Whakamahinga Taiao Rongoā (Haunga te whakahoromata mamaoa)
Utu Whakatairanga:
Waenga – Teitei
5) Pūwhakapūngao Fluoroelastomer/Viton®
Ko ngā Viton® fluoroelastomers kua whakarōpūtia i raro i te tohu FKM. Ko tēnei akomanga o ngā elastomers he whānau kei roto ko ngā copolymers o te hexafluoropropylene (HFP) me te vinylidene fluoride (VDF, VF2 rānei).
Ka kitea ngā terpolymers o te tetrafluoroethylene (TFE), te vinylidene fluoride (VDF) me te hexafluoropropylene (HFP) me ngā mea motuhake kei roto ko te perfluoromethylvinylether (PMVE) i ngā taumata matatau.
E mōhiotia ana te FKM hei otinga whiriwhiri ina hiahiatia he ātete pāmahana teitei me te ātete matū.
Ngā Āhuatanga Matua:
Te Awhe Pāmahana Mōrahi mai i ~ -30°C ki te 315°C (-20° – 600°F).
Ko te ātete pāmahana teitei tino pai.
He ātete tino pai ki te UV, te ozone me te huarere.
Kāore i te tino ātete ki ngā ketone, ki ngā esters taumaha ngota iti rānei.
He ātete ngoikore ki ngā waipiro me ngā matū kei roto he hauota
Te ātete ngoikore ki te pāmahana iti.
Te nuinga o te wā e whakamahia ana i roto i:
Ngā tono hiri wai/SCUBA
Ngā tono wahie motuka me ngā kukū teitei o te Biodiesel
Ngā tono hiri ā-rangi hei tautoko i ngā pūnaha wahie, hinu whakahinuhinu, me te waipēhi
Utu Whakatairanga:
Teitei
Wā tuku: Paenga-whāwhā-15-2020