Mhandara PLA resin, inonatswa uye yakaomeswa kusvika 400-ppm mwando nhanho isati yasiya chirimwa chekugadzira. PLA inotora mwando wepakati nekukurumidza, inogona kutora hunyoro hunosvika 2000 ppm panzvimbo yakashama yekamuri uye mazhinji ematambudziko anowanikwa paPLA anomuka nekusaomeswa kwakakwana. PLA inodiwa kuti iomeswe zvakanaka isati yagadziriswa. Nekuda kwekuti iri condensation polymer, kuvapo kwehunyoro hushoma panguva yekunyunguduka kunokonzeresa kudzikira kwemaketani epolymer uye kurasikirwa kwehuremu hwemamorekuru uye michina. PLA inoda madhigirii akasiyana ekuomesa zvichienderana negiredhi uye kuti ichashandiswa sei. Pasi pe200 PPM iri nani nekuti viscosity ichave yakagadzikana uye inova nechokwadi chemhando yechigadzirwa.
Kufanana nePET, mhandara PLA inounzwa pre-crystallized. Kana isina kucheneswa, PLA inonamira uye inoputika kana tembiricha yayo yasvika 60 ℃. Iyi ndiyo tembiricha yePLA yegirazi-shanduko (Tg); nzvimbo iyo iyo amorphous material inotanga kupfava. (Amorphous PET ichaita agglomerate pa80 ℃) Regrind zvinhu zvakadzoserwa kubva mukugadzira-mumba senge extruder edge trim kana thermoformed skeleton scrap inofanirwa kucheneswa isati yagona kugadziridzwa. Kana crystallized PLA ikapinda mukuomeswa uye inoratidzwa nekudziya pamusoro pe140 F, inokonzeresa uye kukonzera kuvharika kwenjodzi mumudziyo wese. Naizvozvo, crystallizer inoshandiswa kubvumira PLA kuti ishanduke kuburikidza neTg ichiri pasi pekunetseka.
Ipapo PLA inoda Dryer uye crystallizer
1. Yakajairika drying system --- inobvisa humidifying (desiccant) dryer
Amorphous mamakisi anoshandiswa kupisa seal layers mufirimu anoomeswa pa60 ℃ kwe4 maawa. Crystallized mamakisi anoshandiswa extrude sheet uye firimu anoomeswa pa80 ℃ kwe4 maawa. Maitiro ane nguva refu yekugara kana tembiricha yakakwira senge fiber kuruka inoda kuomeswa zvakanyanya, kusvika pasi pe50 PPM yehunyoro.
Uye zvakare, Infrared crystal dryer--- IR Dryer yakaratidzwa kuti inyatso kristaro Ingeo biopolymer panguva yekuomesa. uchishandisa Infrared drying (IR). Nekuda kwehuwandu hwepamusoro hwekufambiswa kwesimba neIR kudziyisa pamwe chete nehurefu hwemafungu hunoshandiswa, mutengo wesimba unogona kudzikiswa zvakanyanya, pamwe nehukuru.Muedzo wekutanga wakaratidza kuti mhandara Ingeo biopolymer inogona kuomeswa uye amorphous flake yakakwenenzverwa nekuomeswa mukati memaminitsi gumi nemashanu chete.
Infrared crystal dryer--- ODE Dhizaini
1. Nekugadzirisa kweDrying uye crystallizing panguva
2. Kuomesa nguva ndeye 15-20mins (Nguva yekuomesa zvakare inogona kuchinjika sezvinodiwa nevatengi pakuomesa zvinhu)
3. Kuomesa tembiricha inogona kuchinjika (Range kubva 0-500 ℃)
4. Kunyorova kwekupedzisira: 30-50ppm
5. Mutengo wemagetsi chengetedza nezve 45-50% uchienzanisa neDesiccant dryer &crystallizer
6.Space kuchengetedza: kusvika ku300%
7. Yese sisitimu inodzorwa Nokia PLC, iri nyore kushanda
8. Kurumidza kutanga
9. Kukurumidza kuchinja-pamusoro uye nguva yekuvhara
Yakajairika PLA (polylactic acid) maapplication ari
Fiber extrusion: mabhegi eti, zvipfeko.
Jewel moulding: jewel kesi.
Mishonga: nehuni, PMMA.
Thermoforming: clamshells, cookie trays, makapu, makofi pods.
Blow moulding: mabhodhoro emvura (asina carbonated), majusi matsva, mabhodhoro ekuzora.
Nguva yekutumira: Feb-24-2022