Isuku rya buji

Nyuma yo gushungura buji ya buji ikoreshwa mugihe runaka kumurongo uzunguruka, bizahagarikwa numwanda, kandi itandukaniro ryumuvuduko uri hagati yinjirira nisohoka rya sisitemu yo gushungura polymer yiyongera, kandi ibyo byungurujwe bya buji bikenera gusukurwa mbere yuko ikoreshwa.Isuku ikoresha cyane cyane uburyo bwumubiri nubumara bwo kubara, gushonga, okiside cyangwa hydrolyze polymer yometse ku bushyuhe bwinshi, hanyuma ugakaraba amazi, gukaraba alkali (aside) no koza ultrasonic.

Uburyo bwo gukora isuku burimo: uburyo bwo kubara, kwiyuhagira umunyu, uburyo bwa tri-Ethylene glycol, uburyo bwa hydrolysis bwo hejuru, uburyo bwo kuryama bwa alumina, hamwe nuburyo bwo koza vacuum.Kugeza ubu, uburyo bukoreshwa cyane bwo gukora isuku nuburyo bwa tri-Ethylene glycol, uburyo bwa hydrolysis bwo hejuru, hamwe nuburyo bwo koza vacuum.

Uburyo bwa tri-Ethylene glycol nugukoresha ihame ryuko polymer ishobora gushonga na tri-ethylene glycol mugihe cyo gutekesha glycol ya tri-Ethylene (285 ° C kumuvuduko usanzwe) kugirango ugere kumugambi wo gukora isuku.Intambwe yo gukora isuku nugushira ikintu kigomba gusukurwa muri tank ya tri-etylene glycol hamwe na sisitemu yo gushyushya, ukazamura kuva mubushyuhe bwicyumba ukagera kuri 265 ° C, ukagumana ubushyuhe mumasaha 6, hanyuma ukareka bikonja kugeza kuri 100 ° C. bisanzwe, fata ikintu kigomba gusukurwa, hanyuma ubishyire Kwoza mumazi ashyushye hafi 95 ° C muminota 20, hanyuma ubishire mumuti wa 10% NaOH mubushyuhe bwa 60-70 ° C kuri Amasaha 12, hanyuma ukakaraba n'amazi ashyushye.Niba ari spinneret hamwe na filteri yo gushonga, isuku ya ultrasonic irakenewe.Igikoresho cyoza ni amazi meza ku bushyuhe bwa 60-70 ° C.Igihe cyo gukora isuku ni iminota 15-20 hanyuma amaherezo gihumeka cyumuyaga uhumanye.

Uburyo bwa hydrolysis yo mu rwego rwo hejuru ni ugukoresha polymer kugirango byoroshye hydrolyz na alkaline hydrolyz ku bushyuhe bwo hejuru kugirango habeho ibintu bike bya molekile, kugirango ugere ku ntego yo kuvaho.Nugushira ikintu kigomba gusukurwa muri autoclave, kugaburira amavuta ya 0.3-0.6MPa, ubushyuhe bugera kuri 130-160 ° C, kandi igihe ni amasaha 2-8.Muri autoclave, niba hiyongereyeho NaOH nkeya, igihe cyogusukura kirashobora kugabanywa, hanyuma gukaraba amazi, gukaraba alkali, hamwe nogusukura ultrasonic.

Uburyo bwo gusukura vacuum nabwo bwitwa uburyo bwa vacuum pyrolysis.Ihame ryakazi ryayo ni ukubanza kuzamura ubushyuhe kugera kuri 300 ° C no gukomeza gushyuha mugihe runaka kugirango ushonge polyester cyangwa izindi polymers ndende kumurimo wakazi kugirango utunganyirizwe, kandi ibikoresho byashongeshejwe birasohoka birasohoka.Noneho shyushya, hafi ya 350 ° C, polyester isigaye itangira kubora, muriki gihe, fungura pompe vacuum kugirango yimuke, ubushyuhe bugere kuri 500 ° C, kandi ukomeze gushyuha.Mugihe kimwe, umwuka muke utangizwa kugirango okiside ibisigisigi.Muri vacuum, kwangirika kwubushyuhe no kubora kwa okiside ya polyester isigaye byihuse, kandi gaze yabyaye hamwe nuduce twa ivu byanyunyujwe kugirango bigere ku ntego yo gukora isuku.