Mundima yemagetsi, chimwe chezvinhu zvakakosha pawaya dzemagetsi netambo insulating uye jacketing zvinhu.Kwemakore akawanda, pre-eminent insulation material yetambo dzemagetsi raive bepa rakaiswa mafuta nekuda kwehunhu hwayo hwemagetsi.Iyo ine zvakare hunyanzvi hwekumira yakakwira dhigirii yekupisa yekupisa pasina kuderera zvakanyanya.Nekudaro, nekuda kweiyo hygroscopicnature, iyo simbi sheath inonyorova.Pakave, saka, kudiwa kwenguva refu kwemagetsi emagetsi ekudzivirira, ayo aive nemusanganiswa weiyo isiri-hygroscopic chimiro che thermoplasticmaterials.
Kuenderera mberi kwekutsvaga kwechiroto chakadaro kwakazoguma nekuwanikwa kweiyo cross-yakabatana polyethylene.Iko kuchinjika kwemapolymers kunoreva kugadziridzwa kwepolymer zvivakwa nekuchidzira makemikari zvinongedzo pakati peumwe macromolecules.Nekubatanidza mapolymers akadai sepolyethylene, matatu-dimensional network yezvisungo inoumbwa pakati pepolymer cheni iyo inowedzera huremu hwemamorekuru.Izvi zvakafanana nemagadzirirwo e'vulcanising rubber'.
Maitiro echinyakare e'vulcanisation' anosanganisira kudziyisa nekuwedzera sarufa kana mamwe makemikari kuti agadzire machinjiro pakati pehunhu hurefu hurefu hwemamorekuru elastomer.Iyi nzira yakatanga kare uye ichiri kushandiswa.Iyo pfuma yepolymer inoenderana nehuwandu hwesarufa inoshandiswa.Uyezve iyo sarufa inoshandiswa ndeye, iyo yakanyanya kuoma chigadzirwa, icho chinomira yakakwira tembiricha, kudzvanywa uye nemakanika matambudziko kukuvimbika kwayo.Asi sulfur vulcanisation ine zvipingamupinyi zvakakomba maererano nehutano hwevanhu uye nharaunda uye ine zvimwe zvinokanganisa hupfumi.Uyezve, inoda kupisa kwakanyanya kuti itange kuita kwemakemikari uye inoburitsa magasi anonhuwa uye ane muchetura pamwe nekugadzira masara emakemikari akawanda asingadiwe anofanira kubviswa muchigadzirwa chekupedzisira.
'Radiation crosslinking' ndiyo nzira yakanyatsopupurirwa inodarika zvese izvi zvakaipa zvinokonzerwa nevulcanisation process.Iyo inzira yekudziya yekamuri ine pachayo yakakosha mutengo mukana.Iyo inodzorwa zviri nyore uye inodiwa zvimiro zvepolymer zvinowanikwa nekungochinja dosi (nguva yeradiation).Izvo zvakashandurwa zvinhu hazvisi zvakaderera kune izvo zvinogadzirwa nesulphurvulcanization.
Chinhu chekutanga chekuyambuka ndechekusimudzira iyo thermal resistivity.Kazhinji, tembiricha inotenderwa mupfupi wedunhu ndeye 140⬚C kune isina-crosslinked polyethylene tambo inogona kukwidziridzwa kusvika 250⬚C neradiation crosslinking process.Chechipiri chinonyanyozivikanwa chinangwa ndechekurangarira senge kuratidzwa ne shrink tubing.Iyi ndiyo isina kujairika uye yakakosha pfuma ye irradiated polyethylene uye inochengetwa zvachose mukati mepolymer zvisinei nenguva uye chero inotevera nhamba ye deformation.Nokudaro, kana polyethylene yakavhenekerwa mune imwe crystalline fomu (kureva pazasi penzvimbo yayo yekunyungudika) uye yozopisa kubvisa makristasi, inogona kuremara zvakanyanya (semuenzaniso nekutambanudza-ing) uye yozotonhodzwa zvakare kune makristasi kuti agadzirise muchimiro chayo chitsva.Kana zvinhu zvikapisa zvakare pamusoro pekunyungudika, makristasi aya anonyangarika uye rabha-senge polyethylene inozodzokera kuchimiro kana yakavharirwa panguva yekuvhenekesa pamwe mwedzi kana makore zvisati zvaitika.Shrink tubing inogadzirwa neextruding yakanyatsogadzirwa polymer muchubhu uye yozoyambuka iyi chubhu.Mushure mekuyambuka, thetube inopisa, yakawedzerwa uye yakanyoroveswa mune yakawedzera fomu.Iyi chubhu yakawedzerwa, yakambodziswazve inodzokera kuchimiro chayo chepakutanga, izvo zvinokonzerwa nekurangarira mhedzisiro yekuyambuka.Sezvo mapolymermolecules akabatana nemakemikari kune mumwe nemumwe uye asingachakwanise kufamba chero nguva, akasiyana siyana senge kupisa kupisa, abrasion resistance, dimensional stability, adhesion property nezvimwe zvinovandudzwa.Nokudaro, crosslinking inogona kupa zvinhu zvinodikanwa kune polymer, kureva kusimba, kushanduka, kupikisa, kupikisa kwemakemikari, etc. Irradiated polyethylene inoshandiswa zvakanyanya kupisa mafirimu ekupisa kurongedza, kuvhara uye kwekubatanidza magetsi, izvo zvinogona kupisa nyore nyore kune zvimwe zvikamu. .Nekuchinjika, iyo yakachinjika waya / tambo yekumisikidza iri nyore uye haina kubva paurefu hwekumisa.Uyezve, hapana metallic sheath inodiwa pakugadzirisa.Uye zvakare, iyo tensile zvivakwa zviri zvepakati pakati pe thermoplastic uye anelastomer.
Nguva yekutumira: Feb-18-2017