Letlalo la maiketsetso le thehiloeng ho PVC (PVC-AL) e ntse e le thepa e hlahelletseng ka har'a makoloi a ka hare ho likoloi, upholstery le masela a indasteri ka lebaka la ho leka-lekana ha theko, ts'ebetso le bokhoni bo fapaneng ba botle. Leha ho le joalo, ts'ebetso ea eona ea tlhahiso e aparetsoe ke liphephetso tsa mantlha tsa tekheniki tse thehiloeng ho thepa ea lik'hemik'hale ea polymer-liphephetso tse amang ts'ebetso ea sehlahisoa ka kotloloho, ho latela melao le katleho ea tlhahiso.
Ho senyeha ha Thermal: Tšitiso ea Motheo ea Ts'ebetso
Ho hloka botsitso ha PVC ho mocheso o tloaelehileng oa ho sebetsa (160-200 ° C) ho baka bothata ba mantlha. Polymer e na le dehydrochlorination (HCl elimination) ka karabelo ea ketane e ikemetseng, e lebisang ho mathata a mararo:
• Tšitiso ea ts'ebetso:E lokollotsoe HCl e senya lisebelisoa tsa tšepe (li-calender, li-coating dies) 'me li baka ho phalla ha matrix a PVC, e leng se bakang bofokoli bo kang mahlaseli a holim'a metsi kapa botenya bo sa lekaneng.
• Phetoho ea 'mala oa sehlahisoa:Tatelano ea polyene e kopantsoeng e entsoeng nakong ea ho senyeha e fana ka bosehla kapa bosootho, e hlōleha ho finyella litekanyetso tse tiileng tsa ho lumellana ha mebala bakeng sa likopo tse phahameng.
• Tahlehelo ea thepa ea mochini:Chain scission e fokolisa marang-rang a polymer, e fokotsa matla a matla a letlalo a felisitsoeng le ho hanyetsa ho taboha ka 30% maemong a boima.
Mathata a Boikamahanyo ba Tikoloho le Taolo
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Tlhahiso ea setso ea PVC-AL e tobane le tlhahlobo e ntseng e eketseha tlasa melaoana ea lefats'e (mohlala, EU REACH, litekanyetso tsa US EPA VOC):
• Mesi e hlahisoang ke Volatile organic compound (VOC):Ho senyeha ha mocheso le ho kenya li-VOCs tsa polasetiki tse thehiloeng ho solvent (mohlala, li-derivatives tsa phthalate) tse fetang moeli oa tlhahiso.
• Mesaletsa ea tšepe e boima:Sistimi ea li-stabilizer ea lefa (mohlala, lead, cadmium-based) e siea litšilafalo, lihlahisoa tse thibelang ho tsoa litifikeiting tsa eco-label (mohlala, OEKO-TEX® 100).
• Qetellong ea bophelo bo ka sebelisoa hape:PVC e sa tsitsang e senyeha le ho feta nakong ea ts'ebetso ea mochini, e hlahisa leachate e chefo le ho fokotsa boleng ba lijo tse feptjoang hape.
Mafutsana Durability Tlas'a Maemo a Tšebeletso
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Le kamora tlhahiso, PVC-AL e sa tsitsang e na le botsofali bo potlakileng:
• Ho senyeha ho bakoang ke UV:Khanya ea letsatsi e etsa hore ho be le oxidation ea foto, ho pshatla liketane tsa polymer le ho baka bofokoli - bo bohlokoa haholo bakeng sa upholstery ea koloi kapa kantle.
• Ho falla ha Plasticizer:Ntle le matlafatso ea matrix a stabilizer-mediated, li-plasticizers li tsamaea ha nako e ntse e ea, tse lebisang ho thatafalang le ho peperana.
Karolo e Fokotsang ea PVC Stabilizers: Mechanism le Boleng
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Li-stabilizers tsa PVC li sebetsana le lintlha tsena tsa bohloko ka ho lebisa litsela tsa ho senyeha boemong ba limolek'hule, ka mekhoa ea morao-rao e arotsoe ka lihlopha tse sebetsang:
▼ Thermal Stabilizers
Tsena li sebetsa joalo ka li-scavenger tsa HCl le li-terminators tsa ketane:
• Ba fokotsa HCl e lokolotsoeng (ka ho arabela ka sesepa sa tšepe kapa li-organic ligands) ho emisa autocatalysis, ho eketsa botsitso ba fensetere ka metsotso e 20-40.
• Organic co-stabilizers (mohlala, hindered phenols) li tšoasa li-radicals tsa mahala tse hlahisoang nakong ea ho senyeha, ho boloka botšepehi ba ketane ea limolek'hule le ho thibela ho fetoha ha mebala.
▼ Li-Stabilizers tsa Leseli
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Li kopantsoe le lisebelisoa tsa mocheso, li monya kapa li senya matla a UV:
• Lisebelisoa tsa UV (mohlala, li-benzophenone) li fetolela mahlaseli a UV mochesong o se nang kotsi, ha li-amine light stabilizer (HALS) li thibetsoe ho nchafatsa likarolo tse senyehileng tsa polymer, e leng ho imena habeli bophelo ba ts'ebeletso ea kantle ea thepa.
▼ Mekhoa e metle ea tikoloho
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Calcium-zinc (Ca-Zn) e kopanyang li-stabilizersli nkile sebaka sa mefuta e meng ea tšepe e boima, tse fihlelang litlhoko tsa taolo ha li ntse li boloka ts'ebetso. Ba boetse ba fokotsa tlhahiso ea VOC ka 15-25% ka ho fokotsa ho senyeha ha mocheso nakong ea ts'ebetso.
Li-stabilizers joalo ka Tharollo ea Motheo
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Li-stabilizers tsa PVC ha se li-additives feela - li thusa ho hlahisa PVC-AL e sebetsang. Ka ho fokotsa ho senyeha ha mocheso, ho netefatsa ho lateloa ha melao, le ho matlafatsa nako e telele, ba rarolla liphoso tsa mantlha tsa polymer. Ho boletse joalo, ba ke ke ba sebetsana le mathata ohle a indasteri: tsoelo-pele ea li-plasticizers tse thehiloeng ho bio le ho tsosolosa lik'hemik'hale li ntse li hlokahala ho hokahanya PVC-AL ka botlalo le lipakane tsa moruo oa selikalikoe. Leha ho le joalo, hajoale, litsamaiso tse ntlafalitsoeng tsa stabilizer ke tsela e tsoetseng pele ka ho fetesisa ea tekheniki le e bolokang chelete e ngata ho ea ho letlalo la maiketsetso la PVC la boleng bo holimo le le lumellanang.
Nako ea poso: Nov-12-2025