Sheath kapa sheath e ka ntle ke lesela le ka ntle le sirelelitseng mohahong oa thapo ea optical, haholo-holo e entsoeng ka thepa ea PE sheath le PVC sheath material, le thepa ea sheath e sa keneleng mollo ea halogen le lisebelisoa tsa sheath tsa motlakase tse sa thibeleng li sebelisoa liketsahalong tse khethehileng.
1. Lintho tse bonahalang tsa PE sheath
PE ke khutsufatso ea polyethylene, e leng motsoako oa polymer o entsoeng ke polymerization ea ethylene. Thepa e ntšo ea sheath ea polyethylene e entsoe ka ho kopanya ka mokhoa o ts'oanang le ho kopanya resin ea polyethylene e nang le stabilizer, carbon black, antioxidant le plasticizer ka tekanyo e itseng. Lisebelisoa tsa sheath tsa polyethylene bakeng sa likhahla tsa optical cable li ka aroloa ka polyethylene e tlaase-tlaase (LDPE), polyethylene e tlaase-tlaase (LLDPE), polyethylene e bohareng (MDPE) le polyethylene e phahameng (HDPE) ho ea ka boima ba 'mele. Ka lebaka la ho fapana ha tsona le libopeho tsa limolek'hule, li na le thepa e fapaneng. Polyethylene e tlaase-tlaase, e tsejoang hape e le polyethylene ea khatello e phahameng, e entsoe ka copolymerization ea ethylene ka khatello e phahameng (ka holimo ho 1500 atmospheres) ho 200-300 ° C le oksijene e le sesosa. Ka hona, ketane ea limolek'hule ea polyethylene e tlaase-tlaase e na le makala a mangata a bolelele bo fapaneng, a nang le lekala le phahameng la ketane, sebopeho se sa tloaelehang, crystallinity e tlaase, le ho feto-fetoha ha maemo le ho lelefatsa. Polyethylene e phahameng haholo, e tsejoang hape e le polyethylene e tlaase, e entsoe ka polymerization ea ethylene ka khatello e tlaase (1-5 atmospheres) le 60-80 ° C ka aluminium le li-catalyst tsa titanium. Ka lebaka la kabo e moqotetsane ea boima ba limolek'hule ea polyethylene e phahameng haholo le tlhophiso e hlophisehileng ea limolek'hule, e na le thepa e ntle ea mochini, ho hanyetsa lik'hemik'hale tse ntle le mefuta e mengata ea mocheso oa tšebeliso. Polyethylene sheath e entsoe ka ho kopanya polyethylene ea boleng bo holimo le polyethylene e tlaase ka tekanyo e nepahetseng, kapa ka ho etsa polymerizing ethylene monomer le propylene (kapa monomer ea bobeli ea 1-butene). Ka hona, ts'ebetso ea polyethylene ea mahareng e pakeng tsa polyethylene e phahameng haholo le polyethylene e tlaase-tlaase, 'me e na le ho feto-fetoha ha polyethylene e fokolang haholo le ho hanyetsa ho apara ka mokhoa o babatsehang le matla a tsitsitseng a polyethylene e phahameng. Linear low-density polyethylene e entsoe ka polymerized ka khase e tlase ea khase kapa mokhoa oa tharollo ka ethylene monomer le 2-olefin. Tekanyo ea lekala ea polyethylene e nang le mela e tlase e pakeng tsa letsoalo le tlase le letsoalo le phahameng, ka hona e na le khanyetso e ntle ea khatello ea tikoloho. Khanyetso ea khatello ea tikoloho ke sesupo sa bohlokoa haholo bakeng sa ho khetholla boleng ba lisebelisoa tsa PE. E bua ka ketsahalo ea hore sekhechana sa tlhahlobo ea lintho tse bonahalang se tlas'a khatello e kobehang se phunyeha tikolohong ea surfactant. Lintlha tse amang khatello ea kelello ea lintho tse bonahalang li kenyelletsa: boima ba molek'hule, kabo ea boima ba limolek'hule, crystallinity, le microstructure ea ketane ea molek'hule. Ha boima ba limolek'hule bo le boholo, ho fokotsa boima ba limolek'hule, ho ba le likamano tse ngata pakeng tsa li-wafers, ho ntlafatsa ho hanyetsa khatello ea tikoloho ea thepa, le bophelo bo bolelele ba tšebeletso; ka nako e ts'oanang, crystallization ea thepa e boetse e ama letšoao lena. Ho theola kristale, ho tla ba betere ho hanyetsa khatello ea tikoloho ea thepa. Matla a tsitsipano le bolelele nakong ea khefu ea lisebelisoa tsa PE ke sesupo se seng sa ho lekanya ts'ebetso ea thepa, hape e ka bolela esale pele ntlha ea ho qetela ea tšebeliso ea thepa. Likahare tsa khabone ka thepa ea PE li ka hanela ka nepo khoholeho ea mahlaseli a ultraviolet holim'a thepa, 'me li-antioxidants li ka ntlafatsa ka katleho thepa ea antioxidant ea thepa.
2. PVC sheath thepa
Lintho tse thibelang lelakabe tsa PVC li na le liathomo tsa chlorine, tse tla chesa lelakabe. Ha e chesa, e tla senya le ho lokolla palo e kholo ea khase ea HCL e senyang le e chefo, e tla baka kotsi ea bobeli, empa e tla tima ka boeona ha e tloha lelakabe, kahoo e na le tšobotsi ea ho se jale lelakabe; ka nako e ts'oanang, thepa ea sheath ea PVC e na le maemo a bonolo le ho atolosoa, 'me e sebelisoa haholo mehalang ea kahare ea optical.
3. Sesebelisoa sa sheath se se nang halogen se nang le malakabe
Kaha polyvinyl chloride e tla hlahisa likhase tse chefo ha li chesa, batho ba thehile mosi o fokolang, o se nang halogen, o se nang chefo, o hloekileng lelakabe le thibelang mollo, ke hore, ho eketsa li-inorganic flame retardants Al(OH)3 le Mg(OH)2 ho lisebelisoa tse tloaelehileng tsa sheath, tse tla lokolla metsi a kristale ha li kopana le mollo le ho monya mocheso o mongata, ka hona ho thibela mocheso oa thepa ea sheath ho nyoloha le ho thibela ho tuka. Kaha li-inorganic flame retardants li eketsoa ho thepa ea sheath e sa sebetseng ea halogen, conductivity ea li-polymers e tla eketseha. Ka nako e ts'oanang, li-resin le li-inorganic flame retardants li fapane ka ho felletseng ka lisebelisoa tsa mekhahlelo e 'meli. Nakong ea ts'ebetso, hoa hlokahala ho thibela ho kopanya ho sa tšoaneng ha li-flame retardants sebakeng sa heno. Li-inorganic flame retardants li lokela ho eketsoa ka bongata bo loketseng. Haeba karolo e le kholo haholo, matla a mochine le bolelele nakong ea khefu ea thepa e tla fokotseha haholo. Matšoao a ho lekola thepa e thibelang lelakabe ea li-halogen-free flame retardants ke index ea oksijene le khatello ea mosi. Lenane la oksijene ke palo e fokolang ea oksijene e hlokahalang bakeng sa lisebelisoa ho boloka ho tuka ho leka-lekaneng ka khase e tsoakiloeng ea oksijene le naetrojene. Ha index ea oksijene e le kholoanyane, e ntlafatsa thepa e thibelang malakabe. Mosi oa mahloriso o baloa ka ho lekanya phetisetso ea lebone le ts'oanang la leseli le fetang mosi o hlahisoang ke ho chesoa ha thepa sebakeng se itseng le bolelele ba tsela ea optical. Ha mosi o le tlase, ho fokotseha ha mosi le ho ntlafatsa ts'ebetso ea thepa.
4. Letšoao la motlakase le hananang le thepa ea sheath
Ho na le mehala e mengata ea mecha ea phatlalatso e ikemetseng ea optical (ADSS) e lutseng tora e le 'ngoe e nang le mela e phahameng ea motlakase tsamaisong ea puisano ea matla. Bakeng sa ho hlola tšusumetso ea matla a phahameng a motlakase a kenang ka har'a sheath ea cable, batho ba ntlafalitse mme ba hlahisa thepa e ncha e sa sebetseng ea leqeba la motlakase, thepa ea sheath ka ho laola ka thata litaba tsa khabone e ntšo, boholo le kabo ea likaroloana tse ntšo tsa carbon. , ho eketsa li-additives tse khethehileng ho etsa thepa ea sheath e na le ts'ebetso e ntle ea motlakase e thibelang leqeba.
Nako ea poso: Aug-26-2024