A filin lantarki, ɗaya daga cikin mahimman abubuwan wayoyi da igiyoyi shine insulating da jacketing kayan.Shekaru da yawa, abubuwan da aka fi sani da suttura don igiyoyi masu amfani da wutar lantarki shine takarda mai cike da man fetur saboda kyawawan halayen lantarki.Har ila yau, yana da ikon jure babban nauyin nauyin zafin jiki ba tare da lalacewa ta wuce kima ba.Koyaya, saboda hygroscopicnature ɗin sa, kwafin ƙarfe ya lalace.Akwai, saboda haka, daɗaɗɗen buƙatun buƙatun abin rufewa mai ƙarfi, wanda ke da haɗuwa da yanayin rashin hygroscopic na thermoplasticmaterials.
Ci gaba da bincike don irin wannan kayan mafarki a ƙarshe ya haifar da gano polyethylene mai haɗin giciye.Haɗin kai na polymers yana nufin gyare-gyaren kaddarorin polymer ta hanyar haifar da haɗin sinadarai tsakanin macromolecules guda ɗaya.Ta hanyar haɗa nau'ikan polymers irin su aspolyethylene, hanyar sadarwa mai girma uku na haɗin gwiwa tana samuwa tsakanin sarƙoƙi na polymer wanda ke ƙara nauyin kwayoyin halitta.Wannan yana kwatankwacin tsarin '' vulcanising robar '.
Tsarin 'vulcanisation' na al'ada ya haɗa da dumama da ƙara sulfur ko wasu sinadarai don samar da hanyoyin haɗin kai tsakanin halayen dogayen sarƙoƙi na ƙwayoyin elastomer.Wannan tsari ya fara tun da daɗewa kuma har yanzu ana amfani da shi.Dukiyar polymer ya dogara da adadin sulfur da aka yi amfani da shi.Bugu da ƙari, sulfur da ake amfani da shi, mafi wuya shine samfurin, wanda ke jure yanayin zafi, matsi da ƙalubalen injina ga amincin sa.Amma sulfur vulcanisation yana da babban koma baya game da lafiyar ɗan adam da muhalli kuma yana da wasu naƙasasshe na tattalin arziki.Bugu da ƙari, tana buƙatar zafin jiki mai yawa don fara maganin sinadarai da fitar da iskar gas mai wari da mai guba tare da samar da ragowar sinadarai marasa ƙarfi waɗanda dole ne a cire su daga samfurin ƙarshe.
'Radiation crosslinking' ita ce ingantacciyar hanyar da ta ke ƙetare duk waɗannan munanan tasirin tsarin lalata.Hanya ce ta zafin daki tana da fa'ida mai mahimmanci a cikin kanta.Ana sarrafa shi cikin sauƙi kuma ana samun abubuwan da ake so na polymer ta hanyar canza kashi (lokacin haskakawa).Abubuwan da aka canza ba su da ƙasa da waɗanda ake samarwa ta hanyar sulfurvulcanisation.
Babban abu na ƙetare shi ne haɓaka ƙarfin juriya na thermal.Gabaɗaya, matsakaicin matsakaicin zafin jiki a cikin ɗan gajeren da'irar shine 140 ⬚C don kebul na polyethylene mara igiyar ruwa za'a iya haɓaka shi zuwa 250 ⬚C ta hanyar hanyar haɗin yanar gizo.Makasudi na biyu mafi gama gari shine tasirin ƙwaƙwalwar ajiya kamar wanda aka nuna ta hanyar raguwar tubing.Wannan ita ce sabon abu kuma mai kima na kadarorin polyethylene da aka lalata kuma ana kiyaye ta har abada a cikin polymer ba tare da la'akari da lokaci ba da kowane adadin nakasar da ta biyo baya.Don haka, idan polyethylene ya haskaka a cikin wani sashi na crystalline (watau ƙasa da wurin narkewa) sannan a zafi don cire lu'ulu'u, yana iya zama nakasu sosai (misali ta hanyar shimfiɗawa) sannan a sake sanyaya shi zuwa lu'ulu'u don yin gyara a cikin sabon siffarsa.Idan kayan ya sake yin zafi sama da narkewa, waɗannan lu'ulu'u suna ɓacewa kuma robar-kamar polyethylene za su kasance suna komawa ga sifar idan an ajiye shi a lokacin sakawa mai yuwuwa watanni ko shekaru kafin.An ƙera tubing ɗin da aka ƙera ta hanyar fitar da musamman ƙera polymer a cikin bututu sannan daga baya a haɗe wannan bututu.Bayan hayewa, ana yin zafi da bututun, an faɗaɗa kuma a sanyaya a cikin nau'in faɗaɗa.Wannan bututun da aka faɗaɗa, da zarar ya sake zafi zai koma baya zuwa sifarsa ta asali, wanda ya faru ne saboda tasirin ƙwaƙwalwar ƙwaƙwalwa na haɗin kai.Tunda ƙwayoyin polymer ɗin suna da alaƙa da juna ta hanyar kemikal kuma ba su da ikon motsawa bazuwar ba, an inganta abubuwa daban-daban kamar juriya na zafi, juriyar abrasion, kwanciyar hankali mai girma, kayan mannewa da sauransu.Don haka, crosslinking na iya ba da kyawawan kaddarorin ga polymer, watau tauri, sassauci, juriya mai tasiri, juriya da sinadarai da sauransu. Ana amfani da polyethylene mai zafi sosai don fina-finai masu ƙyalli don marufi, ɗaukar hoto da haɗin wutar lantarki, wanda zai iya jujjuya zafi zuwa sauran abubuwan da aka gyara. .Don sassauƙa, wayoyi/na shigar da kebul ɗin da aka haɗe ya fi sauƙi kuma ba shi da iyakacin tsayi.Bugu da ƙari, ba a buƙatar kumfa na ƙarfe don kiyayewa.Bugu da ƙari, abubuwan da ke da ƙarfi suna tsaka-tsaki tsakanin thermoplastic da anelastomer.
Lokacin aikawa: Fabrairu-18-2017