Nukawoe nye susu siwo ta PVC-plastik ƒe amadede nyea ɣie ɖo?

Nukawoe nye susu siwo ta PVC-plastik ƒe amadede nyea ɣie ɖo?

Plastikwo ƒe ɣie fia kɔsɔkɔsɔ ƒe dɔwɔwɔ si le polymer molecule kɔsɔkɔsɔ si le abe kɔsɔkɔsɔ ene ƒe gbagbã le dzoxɔxɔ gã, oxidizing nɔnɔme, alo le ultraviolet, infrared, kple nugbagbevi suewo ƒe dɔwɔwɔ te, si hea free radical detachment vɛ.

Nusiwo gbɔna koŋue nye alesi plastikwo ƒe ɣie bɔe:

1. Kekeli si woyɔna be ultraviolet

Kekeli si ɣea klẽna ɖe gota ya ƒe ƒuƒoƒoa me nye keklẽ si yia edzi ɖaa si ƒe ƒutsotsoe ƒe didime nye 0.7-3000nm, si me 300-400nm ultraviolet keklẽe nye nusi koŋ gbɔ polymer ƒe gbegblẽ tsona. Eye foton ƒe ŋusẽ si le ultraviolet ƒe didime si nye 290-400nm me nye 300-419kJ/E, si lolo wu kadodoŋusẽ si le atike ƒe kadodo tɔxɛ aɖewo siwo le polymers me ŋu.

2. Ŋusẽkpɔɖeamedzi si dzoxɔxɔdzidzenu kpɔna ɖe ame dzi

Dzoxɔxɔdzidzenu vovovowo kpɔa ŋusẽ vovovowo ɖe PVC ƒe kekeli ƒe liƒo dzi.

Ba/Cd kple organotin carboxylate ƒe atikewo (abe maleic anhydride ester organotin stabilizers ene) ateŋu ana UV ƒe liƒo vaseɖe afi aɖe na PVC profile siwo wozãna le gota, gake organotin ƒe atike siwo me sulfur le (abe sulfur Alcohol organic tin stabilizers ene) naa kekeli ƒe liƒo si seɖoƒe li na. Di-salt lead stabilizer ƒe kekeli ƒe liƒo kɔ wu tri-salt lead stabilizer tɔ.

3. Ŋusẽkpɔɖeamedzi si antioxidant system kpɔna ɖe ame dzi

Fifia la, nusiwo wotsɔna léa nu ɖe ​​te siwo PVC profile wɔlawo zãna la nye nusiwo wotsɔ wɔa nusiwo wotsɔ li ke koŋ. Tsɔ kpe ɖe atike vevitɔ si naa PVC ƒe gbegblẽ li ke ŋu la, wo dometɔ aɖewoe nye amisisi ƒe ɖoɖowo, antioxidant ɖoɖowo kple nusiwo naa PVC ƒe gbegblẽ ƒe ɖoɖo bubuwo.

Antioxidant ƒe ɖoɖoa ate ŋu anye phenolic stabilizers kple phosphite co-stabilizers. Ðewohĩ lãmenugbagbeviwo ƒe ɖiƒoƒo siwo ƒe amadede trɔna bɔbɔe anɔ atike siawo me, eye tsɔ kpe ɖe eŋu la, woate ŋu ato amadede ƒe tɔtrɔ me le kekeli, ɔksidzin, kple tsi ƒe dɔwɔwɔ me.