Paunenge uchitsvaga tambo dzakanakisa uye waya, kusarudza iyo chaiyo sheathing zvinhu kwakakosha. Iyo yekunze sheath ine akasiyana emabasa ekuona kusimba, kuchengetedzwa uye kuita kwetambo kana waya. Hazvishamisi kuti unofanira kusarudza pakati polyurethane (PUR) uyepolyvinyl chloride (PVC). Muchinyorwa chino, iwe uchadzidza nezve misiyano yekuita pakati pezvinhu zviviri izvi uye mashandisirwo ayo ega ega akanyatsokodzera.
Sheathing chimiro uye basa mumatambo uye waya
A sheath (inonziwo outer sheath kana sheath) ndiro rekunze retambo kana waya uye rinoshandiswa uchishandisa imwe yedzakawanda nzira dzekuburitsa. Iyo sheath inodzivirira tambo conductor uye zvimwe zvimiro zvemukati kubva kunze zvinhu senge kupisa, kutonhora, kunyorova kana kemikari uye mekiniki pesvedzero. Iyo inogona zvakare kugadzirisa chimiro uye chimiro cheiyo stranded conductor, pamwe neiyo shielding layer (kana iripo), nekudaro ichideredza kukanganiswa netambo yemagetsi inoenderana (EMC). Izvi zvakakosha kuve nechokwadi chekufambiswa kwesimba, chiratidzo, kana data mukati metambo kana waya. Sheathing inoitawo basa rakakosha mukusimba kwetambo uye waya.
Kusarudza iyo chaiyo sheathing zvinhu kwakakosha pakuona yakanakisa tambo kune yega yega application. Nokudaro, zvakakosha kunyatsoziva chinangwa chetambo kana tambo inofanira kushanda uye kuti ndezvipi zvinodiwa zvinofanira kuzadzisa.
Iyo yakajairika sheathing zvinhu
Polyurethane (PUR) uye polyvinyl chloride (PVC) ndiwo maviri anonyanya kushandiswa sheathing zvinhu zvetambo newaya. Pakuona, hapana mutsauko pakati pezvinhu izvi, asi zvinoratidzira zvakasiyana zvivakwa zvinoita kuti zvive zvakakodzera kune akasiyana maapplication. Uye zvakare, zvimwe zvinhu zvakati wandei zvinogona kushandiswa semasheathing zvinhu, zvinosanganisira kutengeserana rabha, thermoplastic elastomers (TPE), uye akasarudzika epurasitiki makomisheni. Nekudaro, sezvo ivo vasina kunyanya kuwanda kupfuura PUR nePVC, isu tichangoenzanisa maviri aya mune ramangwana.
PUR - Chinhu chinonyanya kukosha
Polyurethane (kana PUR) inoreva boka remapurasitiki akagadzirwa mukupera kwema1930s. Inogadzirwa nekemikari process inonzi addition polymerization. Iyo mbishi inowanzova petroleum, asi zvinhu zvekudyara zvakaita sembatatisi, chibage kana shuga beet zvinogona zvakare kushandiswa mukugadzirwa kwayo. Polyurethane inonzi thermoplastic elastomer. Izvi zvinoreva kuti ivo vanochinjika kana vachipisa, asi vanogona kudzokera kune yavo yepakutanga chimiro kana ichipisa.
Polyurethane ine kunyanya yakanaka mechanic properties. Iyo nyaya ine yakanakisa kupfeka kuramba, kucheka kuramba uye kubvarura kuramba, uye inoramba ichichinjika zvakanyanya kunyangwe pakudziya kwakadzika. Izvi zvinoita kuti PUR inyanyokodzera zvikumbiro zvinoda kufambisa uye kubhenda zvinodiwa, sengetani dzekudhonza. Mumarobhoti maapplication, tambo dzine PUR sheathing dzinogona kumira mamirioni ekukombama kutenderera kana akasimba torsional masimba pasina matambudziko. PUR zvakare ine yakasimba kuramba mafuta, solvents uye ultraviolet mwaranzi. Uye zvakare, zvichienderana nekuumbwa kwechinhu, haina halogen-isina uye inodzoreredza murazvo, ayo akakosha maitiro etambo dzakasimbiswa neUL uye dzinoshandiswa muUnited States. PUR tambo dzinowanzo shandiswa mukugadzira muchina uye fekitori, maindasitiri otomatiki, uye indasitiri yemotokari.
PVC - chinhu chinonyanya kukosha
Polyvinyl chloride (PVC) ipurasitiki yakashandiswa kugadzira zvigadzirwa zvakasiyana kubva kuma1920s. Icho chigadzirwa chegasi cheni polymerization yevinyl chloride. Kusiyana ne elastomer PUR, PVC i thermoplastic polymer. Kana zvinhu zvacho zvakaremara pasi pekudziya, hazvigone kudzoserwa kumamiriro ayo epakutanga.
Sechinhu chinopisa, polyvinyl chloride inopa mikana yakasiyana-siyana nokuti inokwanisa kuenderana nezvinodiwa zvakasiyana nekushandura chiyero chekuumbwa kwayo. Yayo mechanical mutoro simba haina kukwira sePUR, asi PVC zvakare yakanyanya hupfumi; Mutengo wepakati we polyurethane wakapetwa kana. Pamusoro pezvo, PVC haina kunhuhwirira uye inoshingirira kumvura, asidhi uye maajenti ekuchenesa. Ndicho chikonzero nei inowanzoshandiswa muindasitiri yezvekudya kana munzvimbo dzine hunyoro. Nekudaro, PVC haina halogen-isina, ndosaka ichinzi haina kukodzera kune chaiyo yemukati maapplication. Uye zvakare, haisi yekuzvarwa neoiri inodzivirira, asi ichi chivakwa chinogona kuwanikwa neakakosha emakemikari ekuwedzera.
Mhedziso
Zvese zviri zviviri polyurethane uye polyvinyl chloride zvine zvazvakanakira uye zvazvakaipira setambo uye waya sheathing zvinhu. Iko hakuna mhinduro chaiyo kune izvo zvinyorwa zvakanakira kune imwe neimwe application; Zvakawanda zvinoenderana nezvido zvemunhu zvechikumbiro. Mune zvimwe zviitiko, yakanyatsosiyana sheathing zvinhu inogona kunge iri yakanyanya kunaka mhinduro. Nokudaro, tinokurudzira vashandisi kutsvaga mazano kubva kune nyanzvi dzinoziva nezvezvakanaka uye zvakashata zvezvinhu zvakasiyana-siyana uye zvinogona kuyera mumwe nomumwe.
Nguva yekutumira: Nov-20-2024