Virgin PLA resin, imawunikiridwa ndikuuma mpaka 400-ppm mulingo wa chinyezi musanachoke pamalo opangira.PLA imatenga chinyezi chozungulira mwachangu kwambiri, imatha kuyamwa pafupifupi 2000 ppm chinyezi pachipinda chotseguka ndipo mavuto ambiri omwe amakumana nawo pa PLA amayamba chifukwa chakuyanika kosakwanira.PLA imafunika kuumitsidwa bwino musanakonze.Chifukwa ndi polima condensation, kukhalapo kwa ngakhale pang'ono pang'ono chinyezi pa kusungunula processing kumayambitsa kuwonongeka kwa unyolo polima ndi kutaya kwa maselo kulemera ndi makina katundu.PLA imafunika kuyanika mosiyanasiyana malinga ndi kalasi ndi momwe idzagwiritsire ntchito.Pansi pa 200 PPM ndiyabwino chifukwa kukhuthala kudzakhala kokhazikika ndikuwonetsetsa kuti zinthu zili bwino.
Monga PET, namwali PLA imaperekedwa isanakhale crystallized.Ngati sichonyezimira, PLA idzakhala yomata komanso yochuluka pamene kutentha kwake kufika 60 ℃.Uku ndi kutentha kwa galasi-kusintha kwa PLA (Tg);pomwe zinthu za amorphous zimayamba kufewa.(Amorphous PET idzafika pa 80 ℃) Regrind zinthu zomwe zapezedwa kuchokera kukupanga m'nyumba monga ma extruder edge trim kapena thermoformed skeleton scrap ziyenera kusindikizidwa zisanathe kukonzedwanso.Ngati crystallized PLA ilowa mu kuyanika ndikuwunikiridwa ndi kutentha pamwamba pa 140 F, idzaphatikizana ndikuyambitsa kutsekeka koopsa m'chombo chonsecho.Chifukwa chake, crystallizer imagwiritsidwa ntchito kulola PLA kuti isinthe kudzera mu Tg pomwe ikukumana ndi chipwirikiti.
Kenako PLA ikufunika Dryer ndi crystallizer
1. Dongosolo loyanika wamba --- chowumitsira madzi (desiccant).
Makalasi aamorphous omwe amagwiritsidwa ntchito popanga zigawo za kutentha mufilimu amawumitsidwa pa 60 ℃ kwa maola 4.Crystallized magiredi ntchito extrude pepala ndi filimu zouma pa 80 ℃ kwa maola 4.Njira zokhala ndi nthawi yayitali yokhalamo kapena kutentha kwapamwamba monga kupota kwa ulusi umafunika kuyanika kwambiri, mpaka chinyezi chosakwana 50 PPM.
Kuphatikiza apo, chowumitsira kristalo cha infrared--- IR Dryer awonetsedwa kuti amawunikira bwino Ingeo biopolymer pakuyanika.pogwiritsa ntchito infrared drying (IR).Chifukwa cha kuchuluka kwa mphamvu zotengera mphamvu ndi kutentha kwa IR kuphatikiza ndi kutalika kwa mafunde omwe amagwiritsidwa ntchito, mphamvu zamagetsi zimatha kuchepetsedwa kwambiri, limodzi ndi kukula kwake.Kuyesa koyamba kwawonetsa kuti namwali Ingeo biopolymer imatha kuwumitsidwa ndikuwunikiridwa ndi amorphous flake ndikuwumitsa mkati mwa mphindi 15 zokha.
Infrared crystal dryer--- ODE Design
1. Ndi processing wa Kuyanika ndi crystallizing pa nthawi
2. Kuyanika nthawi ndi 15-20mins (Kuyanika nthawi akhoza chosinthika monga chofunika makasitomala pa kuyanika zinthu)
3. Kuyanika kutentha kumatha kusinthidwa (Kuyambira 0-500 ℃)
4. Chinyezi chomaliza: 30-50ppm
5. Mtengo wamagetsi sungani pafupifupi 45-50% poyerekeza ndi Desiccant dryer &crystallizer
6.Kupulumutsa malo: mpaka 300%
7. Dongosolo lonse limayendetsedwa ndi Siemens PLC, yosavuta kugwira ntchito
8. Mofulumira kuyamba
9. Kusintha mwachangu ndi nthawi yotseka
Zomwe zimagwiritsidwa ntchito ndi PLA (polylactic acid) ndizo
Fiber extrusion: matumba a tiyi, zovala.
Jekeseni akamaumba: miyala yamtengo wapatali.
Zosakaniza: ndi nkhuni, PMMA.
Thermoforming: zipolopolo, thireyi cookie, makapu, makapu khofi.
Kuwomba: mabotolo amadzi (osakhala carbonated), timadziti tatsopano, mabotolo odzikongoletsera.
Nthawi yotumiza: Feb-24-2022