Lisebelisoa tsa lipeipi tsa PVC (Polyvinyl Chloride) li fumaneha hohle meahong ea sejoale-joale, lipeipi tsa metsi, drainage, phepelo ea metsi le lipalangoang tsa mokelikeli oa indasteri. Botumo ba bona bo bakoa ke melemo ea tlhaho: ho hanyetsa lik'hemik'hale, ho boloka litšenyehelo, le ho tiea ha sebopeho. Leha ho le joalo, sebopeho sa limolek'hule tsa PVC - tse khetholloang ka ho pheta-pheta likarolo tsa vinyl chloride - li etsa hore e be kotsing ea ho senyeha tlas'a khatello ea mocheso, oxidative le UV. Ke hona mooLi-stabilizers tsa PVCli bapala karolo ea bohlokoa: li fokotsa ho senyeha, ho netefatsa hore lisebelisoa tsa liphaephe li boloka botšepehi le ts'ebetso bophelong ba bona ba tšebeletso. Ka tlase ke tlhahlobo e qaqileng ea likopo tsa bona, mekhoa, le mekhoa ea khetho ea litsamaiso tsa lipeipi tsa PVC.
1. HobanengEtsa PVCLisebelisoa tsa Pipe li Hloka Li-stabilizers
PVC e senyeha ka mokhoa o ke keng oa etsolloa ha e le mochesong o phahameng (o tloaelehileng ts'ebetsong ea extrusion kapa enteng) kapa khatello ea nako e telele ea tikoloho (mohlala, khanya ea letsatsi, mongobo, kapa ho pepesehela lik'hemik'hale). Tsela e ka sehloohong ea ho senya ke dehydrochlorination: mocheso kapa matla a UV a senya li-bond tse fokolang tsa C-Cl, ho lokolla hydrochloric acid (HCl) le ho qala ho etsa ketane e lebisang ho polymer chain scission. Sena se bonahala ka:
• Ho fifala (ho ba mosehla kapa ho sootho)
• Ho lahleheloa ke matla a tšusumetso le ho feto-fetoha ha maemo
• Ho petsoha kapa ho putlama, ho beha kotsing ea ho hana ho lutla
• Tšilafalo ea maro a tsamaisoang (a bohlokoa haholo tsamaisong ea metsi a nooang)
Li-stabilizer li sitisa ts'ebetso ena, li etsa hore e be tsa bohlokoa haholo tlhahisong ea liphaephe tsa PVC.
2. Mechanisms ea PVC Stabilizers ka Pipe Fittings
Li-stabilizers li sebetsa ka mekhoa e mengata ea synergistic ho sireletsa PVC:
•Ho hloekisa HCl:Neutralize e lokollotsoeng hydrochloric acid, e e thibela ho baka tšenyo e eketsehileng.
•Free Radical Inhibition:Emisa tšebetso ea ketane e hlahisoang ke mocheso kapa li-radicals tsa mahala tse hlahisoang ke UV.
•Metal Ion Sequestration:Tlama litšila tsa tšepe (mohlala, tšepe, koporo) tse potlakisang ho senyeha.
•UVTšireletso:Bonahatsa kapa u monye mahlaseli a UV, a bohlokoa bakeng sa ts'ebetso ea lipeipi tsa kantle (mohlala, drainage e kaholimo ho mobu).
•Thuso ea ho Lubrication:Li-stabilizers tse ling (mohlala, li-stabilizers tsa UV), calcium stearate e fokotsa likhohlano nakong ea ts'ebetso, e thibela ho chesa haholo.
3. Mefuta ea Li-Stabilizers tse Sebelisitsoeng ho PVC Pipe Fittings
Khetho ea stabilizer e itšetlehile ka maemo a ts'ebetso, litlhoko tsa tšebeliso ea ho qetela, le ho latela melao ea tsamaiso. Mefuta e tloaelehileng e kenyelletsa:
4. Mekhoa e Bohlokoa ea Khetho bakeng sa Lisebelisoa tsa Pipe
Ha u hlakisa li-stabilizer bakeng sa lisebelisoa tsa lipeipi tsa PVC, bahlahisi ba tlameha ho nahana ka:
•Lisebelisoa tsa ho sebetsa:Lithempereichara tsa Extrusion/molding (160–200°C bakeng sa liphaephe) le linako tsa ho lula li laela botsitso bo hlokahalang ba mocheso. Mekhoa ea mocheso o phahameng (mohlala, lipeipi tsa metsi a chesang) li hloka li-stabilizers tse hanyetsanang le mocheso o matla (mohlala, organotin).
•Tikoloho ea ho Qetela:Lipeipi tsa metsi a nooang li hloka setifikeiti sa NSF/ANSI 61 kapa WRASCa-Znkapa li-stabilizers tsa organotin. Liphaephe tsa kantle li hloka li-stabilizers tsa UV, mohlala, li-stabilizer tse thibelang amine (HALS).
•Tumellano ea Taolo:Lithibelo tsa lefats'e holim'a lirafshoa tse boima (Pb, Cd) li sutumelletsa indasteri ho mekhoa e meng ea eco-friendly (Ca-Zn, organic-based stabilizers).
•Litšenyehelo khahlano le Ts'ebetso:Le hoja li-stabilizer tse thehiloeng ho loto li le theko e tlaase, litšenyehelo tsa nako e telele (mohlala, likotlo tsa taolo, liphephetso tsa ho tsosolosa) li rata mekhoa e tsitsitseng.
5. Mekhoa e Hlahang ho Theknoloji ea Stabilizer
Ha melaoana ea tikoloho e ntse e tiisa 'me ts'ebetso ea ts'ebetso e tla pele, indasteri ea lipeipi tsa PVC e fetohela ho:
•Litsamaiso tsa Ca-Zn tse sebetsang hantle haholo:E matlafalitsoe ka li-co-stabilizers (mohlala, polyols, zeolites) ho ts'oana le ts'ebetso ea mocheso ea mefuta e meng e thehiloeng ho loto.
•Multifunctional Stabilizers:Ho kopanya botsitso ba mocheso, khanyetso ea UV, le lubrication ka har'a tlatsetso e le 'ngoe ho nolofatsa libopeho.
•Li-stabilizer tse thehiloeng ho Bio:E tsoa mehloling e ka nchafatsoang (mohlala, li-ester tse thehiloeng ho limela), ho ikamahanya le lipakane tsa moruo tse chitja.
Li-stabilizers tsa PVCke motheo oa ts'ebetso le bophelo bo bolelele ba lipeipi tsa PVC, tse nolofalletsang ts'ebeliso ea tsona e bolokehileng le e ts'epahalang ho pholletsa le meaho ea bohlokoa. Ho tloha ho thibela ho senyeha nakong ea tlhahiso ho isa ho ts'ebeletso ea lilemo tse mashome libakeng tse thata, karolo ea bona e ke ke ea nkeloa sebaka. Ha indasteri e ntse e tsoela pele, ho tsepamisa maikutlo ho tse fokolang haholo, li-stabilizers tse sebetsang hantle-haholo-holo li-calcium-zinc complexes-li tla khanna mekhoa e mecha, ho leka-lekanya ts'ebetso le boikarabelo ba tikoloho. Bakeng sa lienjineri le bahlahisi, ho khetha se tsitsipano se nepahetseng ha se khetho ea tekheniki feela empa ke boitlamo ba ho tšoarella, polokeho le taolo ea melao.
Nako ea poso: Sep-02-2025