I-resin ye-Virgin PLA, i-crystallized kwaye yomiswa kwinqanaba le-400-ppm lokufuma ngaphambi kokushiya isityalo sokuvelisa.I-PLA ithatha ukufuma kwe-ambient ngokukhawuleza okukhulu, inokufunxa malunga ne-2000 ppm ukufuma kwindawo evulekileyo yegumbi kwaye uninzi lweengxaki ezifunyenwe kwi-PLA zivela ngenxa yokoma okunganelanga.I-PLA ifuneka ukuba yomiswe kakuhle phambi kokuba iqhutywe.Ngenxa yokuba yipolymer yokudibanisa, ubukho bobumanzi obuncinci kakhulu ngexesha lokunyibilika kubangela ukuthotywa kwamatyathanga epolymer kunye nokuncipha kobunzima bemolekyuli kunye neempawu zoomatshini.I-PLA idinga amanqanaba ahlukeneyo okomisa ngokuxhomekeke kwibakala kunye nendlela eya kusetyenziswa ngayo.Ngaphantsi kwe-200 PPM ingcono kuba i-viscosity iya kuzinza kwaye iqinisekise umgangatho wemveliso.
Njenge-PET, i-PLA enyulu ihanjiswa i-pre-crystallized.Ukuba ayikhazimliswanga, iPLA iya kuncamathelisa kwaye idibanise xa ubushushu bayo bufikelela kuma-60℃.Lo ngubushushu beglasi-yenguqu yePLA (Tg);indawo apho i-amorphous material iqala ukuthamba.(I-Amorphous PET iya ku-agglomerate kwi-80℃) I-regrind imathiriyeli efunyenwe kwimveliso yangaphakathi enje nge-extruder edge trim okanye i-thermoformed skeleton scrap kufuneka yenziwe ngekristale phambi kokuba iphinde icocwe.Ukuba i-PLA ecwebezelayo ingena kwinkqubo yokomisa kwaye ibonakaliswe ekufudumezeni ngaphezu kwe-140 F, iya kuhlanganisana kwaye ibangele imiqobo eyintlekele kuyo yonke inqanawa.Ke ngoko, icrystallizer isetyenziselwa ukuvumela iPLA ukuba itshintshe ngeTg ngelixa iphantsi kokuphazamiseka.
Emva koko i-PLA idinga i-Dryer kunye ne-crystallizer
1. Inkqubo yokomisa eqhelekileyo --- isisomisi sokususa umswakama (desiccant).
Amanqanaba e-Amorphous asetyenziselwa ukutywinwa kobushushu kwifilimu ayomiswa kwi-60 ℃ iiyure ezi-4.Amanqanaba eCrystallized asetyenziselwa ukukhupha iphepha kunye nefilimu yomiswa kwi-80 ℃ iiyure ezi-4.Iinkqubo ezinamaxesha amade okuhlala okanye amaqondo obushushu aphezulu afana nefiber spinning zifuna ukomiswa ngaphezulu, ukuya ngaphantsi kwe 50 PPM yokufuma.
Ukongeza, i-infrared crystal dryer--- I-IR Dryer ibonakaliswe ukuba iqaqambise ngokufanelekileyo i-Ingeo biopolymer ngexesha lokumisa.usebenzisa i-Infrared drying (IR).Ngenxa yezinga eliphezulu lokudluliselwa kwamandla kunye nokufudumeza kwe-IR ngokudibanisa nobude obuthile obusetyenzisiweyo, iindleko zamandla zinokuncitshiswa kakhulu, kunye nobukhulu.Uvavanyo lokuqala lubonise ukuba i-biopolymer enyulu ye-Ingeo inokomiswa kwaye i-amorphous flake ikhazimliswe kwaye yomiswe kwimizuzu nje eli-15.
Isomisi sekristale esine-infrared--- Uyilo lwe-ODE
1. Ngokucutshungulwa Kokomisa kunye nekristale ngexesha
2. Ixesha lokumisa li-15-20mins (Ixesha lokumisa liyakwazi ukulungelelaniswa njengemfuno yabathengi kwizinto zokomisa)
3. Ubushushu bokomisa bunokulungiswa (Uluhlu ukusuka ku-0-500℃)
4. Ukufuma kokugqibela: 30-50ppm
5. Iindleko zamandla zonga malunga ne-45-50% ngokuthelekisa ne-Desiccant dryer & crystallizer
6. Ugcino lwesithuba: ukuya kuthi ga kwi-300%
7. Yonke inkqubo ilawulwa Siemens PLC, kulula ukusebenza
8. Ngokukhawuleza ukuqalisa
9. Utshintsho olukhawulezayo kunye nexesha lokuvala
Izicelo eziqhelekileyo zePLA (i-polylactic acid) zi
I-Fiber extrusion: iibhegi zeti, iimpahla.
Isitofu sokubumba: iimeko zamatye anqabileyo.
Iikhompawundi: ngomthi, PMMA.
I-Thermoforming: i-clamshell, ii-cookie tray, iikomityi, iipod zekofu.
Ukubumba ukuvuthela: iibhotile zamanzi (ezingekho carbonated), iijusi ezintsha, iibhotile zokuthambisa.
Ixesha lokuposa: Feb-24-2022