Virgin PLA resin, yog crystallized thiab qhuav rau 400-ppm noo noo theem ua ntej tawm hauv cov nroj tsuag ntau lawm.PLA khaws cov av noo nyob ib puag ncig sai heev, nws tuaj yeem nqus ib puag ncig 2000 ppm noo noo ntawm chav tsev qhib thiab feem ntau ntawm cov teeb meem tshwm sim los ntawm kev ziab tsis txaus.PLA yuav tsum tau qhuav kom zoo ua ntej ua.Vim hais tias nws yog ib tug condensation polymer, muaj txawm ib tug me me npaum li cas ntawm noo noo thaum lub sij hawm yaj ua rau degradation ntawm polymer chains thiab poob ntawm molecular hnyav thiab txhua yam khoom.PLA xav tau ntau qib ntawm ziab nyob ntawm qib thiab nws yuav siv li cas.Nyob rau hauv 200 PPM yog qhov zoo dua vim tias viscosity yuav ruaj khov dua thiab ua kom cov khoom zoo.
Zoo li PET, nkauj xwb PLA raug xa ua ntej-crystalized.Yog tias tsis crystallized, PLA yuav ua nplaum thiab clump thaum nws kub txog 60 ℃.Qhov no yog PLA lub iav hloov pauv kub (Tg);lub ntsiab lus ntawm cov khoom siv amorphous pib soften.(Amorphous PET yuav agglomerate ntawm 80 ℃) Regrind cov ntaub ntawv rov qab los ntawm lub tsev ntau lawm xws li extruder ntug trim los yog thermoformed skeleton seem yuav tsum tau crystalized ua ntej nws yuav tsum reprocessed.Yog tias crystallized PLA nkag mus rau hauv cov txheej txheem ziab thiab raug cua sov siab tshaj 140 F, nws yuav agglomerate thiab ua rau muaj kev puas tsuaj loj thoob plaws hauv lub nkoj.Yog li ntawd, lub crystallizer yog siv los tso cai rau PLA hloov los ntawm Tg thaum muaj kev ntxhov siab.
Tom qab ntawd PLA xav tau lub tshuab ziab khaub ncaws thiab crystallizer
1. Pa tshuab ziab khaub ncaws --- dehumidifying (desiccant) tshuab ziab khaub ncaws
Amorphous qib siv rau cov cua sov foob txheej hauv zaj duab xis yog qhuav ntawm 60 ℃ rau 4 teev.Cov qib crystallized siv los extrude daim ntawv thiab zaj duab xis yog qhuav ntawm 80 ℃ rau 4 teev.Cov txheej txheem nrog lub sijhawm nyob ntev lossis qhov kub siab dua li fiber ntau spinning xav tau kom qhuav ntau dua, kom tsawg dua 50 PPM ntawm cov dej noo.
Tsis tas li ntawd, Infrared siv lead ua tshuab ziab khaub ncaws --- IR Tshuab ziab khaub ncaws tau pom tias ua kom zoo crystallize Ingeo biopolymer thaum ziab.siv Infrared drying (IR).Vim tias qhov siab ntawm lub zog hloov pauv nrog IR cua sov ua ke nrog qhov tshwj xeeb nthwv dej ntev siv, cov nqi hluav taws xob tuaj yeem txo qis, nrog rau qhov loj me.Thawj qhov kev sim tau pom tias tus nkauj xwb Ingeo biopolymer tuaj yeem qhuav thiab amorphous flake crystallized thiab qhuav li ntawm 15 feeb xwb.
Infrared Crystal tshuab ziab khaub ncaws --- ODE Tsim
1. Nrog rau kev ua kom qhuav thiab crystallizing ib zaug
2. Lub sij hawm ziab yog 15-20mins (Lub sij hawm ziab kuj tuaj yeem hloov kho raws li cov neeg siv khoom xav tau ntawm cov khoom kom qhuav)
3. Kev ziab kub tuaj yeem kho tau (Ntau ntawm 0-500 ℃)
4. Thaum kawg noo noo: 30-50ppm
5. Tus nqi zog txuag li 45-50% piv nrog Desiccant tshuab ziab khaub ncaws & crystallizer
6.Qhov chaw txuag: mus txog 300%
7. Tag nrho cov txheej txheem yog tswj Siemens PLC, yooj yim rau kev khiav lag luam
8. Kev pib sai dua
9. Lub sijhawm hloov pauv sai thiab kaw lub sijhawm
Hom PLA (polylactic acid) daim ntawv thov yog
Fiber extrusion: hnab tshuaj yej, khaub ncaws.
Txhaj tshuaj molding: jewel case.
Cov khoom xyaw: nrog ntoo, PMMA.
Thermoforming: clamshells, ncuav qab zib tais, khob, kas fes pods.
Tshuab moulding: fwj dej (tsis yog carbonated), kua txiv hmab txiv ntoo tshiab, fwj tshuaj pleev ib ce.
Post lub sij hawm: Feb-24-2022