I-Virgin PLA resin, icwebezeliswa futhi yomiswa izinga lomswakamo elingu-400-ppm ngaphambi kokushiya isitshalo sokukhiqiza. I-PLA icosha umswakama we-ambient ngokushesha okukhulu, ingakwazi ukumunca umswakama ongaba ngu-2000 ppm endaweni evulekile futhi izinkinga eziningi ezitholakala ku-PLA zibangelwa ukomiswa ngokwanele. I-PLA idingeka ukuthi yomiswe kahle ngaphambi kokucubungula. Ngenxa yokuthi iyi-polymer yokujiya, ukuba khona ngisho nenani elincane kakhulu lomswakama ngesikhathi sokuncibilika kubangela ukuwohloka kwamaketanga e-polymer nokulahlekelwa isisindo samangqamuzana kanye nezakhiwo zemishini. I-PLA idinga amadigri ahlukene okomisa kuye ngebanga nokuthi izosetshenziswa kanjani. Ngaphansi kuka-200 PPM kungcono ngoba i-viscosity izozinza futhi iqinisekise ikhwalithi yomkhiqizo.
Njenge-PET, i-PLA emsulwa ilethwa i-pre-crystallized. Uma ingacwengisisiwe, i-PLA izonamathela futhi igxume lapho izinga lokushisa lifinyelela ku-60℃. Leli izinga lokushisa lengilazi le-PLA (Tg); iphuzu lapho i-amorphous material iqala ukuthamba. (I-Amorphous PET izohlangana ku-80℃) I-Regrind material etholwe ekukhiqizweni kwangaphakathi njenge-extruder edge trim noma i-thermoformed skeleton scrap kumele yenziwe ikristalu ngaphambi kokuthi iphinde icutshungulwe. Uma i-PLA ecwebezelayo ingena enqubweni yokomisa futhi ichayeke ekushiseni ngaphezu kuka-140 F, izohlangana futhi ibangele ukuvinjwa okuyinhlekelele kuwo wonke umkhumbi. Ngakho-ke, i-crystallizer isetshenziselwa ukuvumela i-PLA ukuthi idlule ku-Tg kuyilapho ingaphansi kokuyaluza.
Bese i-PLA idinga I-Dryer ne-crystallizer
1. Isistimu yokomisa evamile --- isomisi esisusa umswakama (desiccant).
Amamaki e-Amorphous asetshenziselwa izendlalelo zophawu lokushisa efilimini ayomiswa ku-60 ℃ amahora angu-4. Amamaki acwebezelayo asetshenziselwa ukukhipha ishidi nefilimu ayomiswa ku-80 ℃ amahora angu-4. Izinqubo ezinezikhathi zokuhlala ezinde noma amazinga okushisa aphezulu njengefayibha spinning zidinga ukomiswa okwengeziwe, kube ngaphansi kuka-50 PPM womswakama.
Ngaphezu kwalokho, isomisi se-infrared crystal --- I-IR Dryer ikhonjiswe ukuthi icwebeze ngempumelelo i-Ingeo biopolymer ngesikhathi somiswa. usebenzisa i-infrared drying (IR). Ngenxa yezinga eliphezulu lokudluliswa kwamandla ngokushisisa kwe-IR kuhlanganiswe nobude obuthile begagasi obusetshenzisiwe, izindleko zamandla zingancishiswa kakhulu, kanye nosayizi.Ukuhlolwa kokuqala kubonise ukuthi i-virgin Ingeo biopolymer ingomiswa futhi i-amorphous flake icwebezeliswe futhi yomiswe kungakapheli imizuzu eyi-15 kuphela.
I-infrared crystal dryer--- Idizayini ye-ODE
1. Ngokucutshungulwa Kokomisa kanye nokucwebezela ngesikhathi
2. Isikhathi sokumisa siyi-15-20mins (Isikhathi sokumisa singashintshwa njengemfuneko yamakhasimende ezintweni ezomisa)
3. Izinga lokushisa lokumisa lingalungiseka (Ibanga ukusuka ku-0-500℃)
4. Umswakama wokugcina: 30-50ppm
5. Izindleko zamandla zonga cishe u-45-50% uma ziqhathaniswa ne-Desiccant dryer &crystallizer
6. Ukonga isikhala: kufika ku-300%
7. Lonke uhlelo lulawulwa i-Siemens PLC, kulula ukuyisebenzisa
8. Ngokushesha ukuqalisa
9. Ukushintsha okusheshayo nesikhathi sokuvala
Izicelo ezijwayelekile ze-PLA (i-polylactic acid) ziyi
I-fiber extrusion: izikhwama zetiye, izingubo.
Ukubumba umjovo: amakesi ayigugu.
Izinhlanganisela: ngokhuni, PMMA.
I-Thermoforming: ama-clamshell, amathreyi amakhukhi, izinkomishi, ama-pods ekhofi.
Ukubunjwa kwe-Blow: amabhodlela amanzi (angenayo i-carbonated), amajusi amasha, amabhodlela ezimonyo.
Isikhathi sokuthumela: Feb-24-2022