Mumakore achangopfuura, kune akawanda-screw extruder system yakasimbiswa mumusika seimwe nzira kune Imwe - screw extruders ine pre-drying system.(Pano tinodaidza multi-screw extrudering system inosanganisira Twin-screw extruders, Planetary roller extruders etc.)
Asi isu tinofunga kuti zvakakosha kuve ne-pre-drying system kunyangwe iwe uri kushandisa multi-screw extruder.Nokuti:
1) Multi-screw extruders izvo zvese zvavanazvo zvakaoma kwazvo vacuum-degassing masisitimu akaiswa pane extruder kudzivirira hydrolysis mhedzisiro kuti isaitike nekuda kwekusina pre-kuomesa maitiro ari kuiswa.Kazhinji mhando yakadaro ye extruder yakasiyana nekushandisa mamiriro:
Hunyoro hunobvumidzwa hwekudya hahufanire kunge hwakakwira kupfuura 3000 ppm (0.3%).
Muchokwadi, Mabhodhoro maflake anoratidza kusiyana mukuchena, saizi yechidimbu, kugovera saizi yechikamu uye ukobvu - uye kunyanya mukunyorova.Post-consumer flakes inobvumira kuchengetedza kusvika ku5,000 ppm yehunyoro muchigadzirwa uye kuchengetedza kakawanda huwandu uhu hwemvura pamusoro payo.Mune dzimwe nyika, hunyoro hwekudya hunogona kusvika ku14,000 ppm kunyange yakazara muBig Bag.
Zvese zviri zviviri mwero wakakwana wehuwandu hwemvura uye kusiyanisa kwayo, izvo zvisingadzivisike, idambudziko chairo kune yakawanda-screw extruder uye yakabatana degassing pfungwa.Izvi zvinowanzokonzera kushanduka kwemaitiro, izvo zvinoonekwa kubva kune zvakanyanya kusiyanisa kubuda kudzvanywa kweiyo extruder. Zvinogoneka kuti huwandu hwakakura hwehunyoro huchiripo sezvo huri kusvika pakunyunguduka kwayo muextruder nekuda kwekunyorova kwekutanga mumhepo. resin, uye huwandu hwakabviswa panguva yevacuum
2) PET yakanyanya hygroscopic uye inotora hunyoro kubva mumhepo.Hunyoro hudiki hunyoro huchaita hydrolyze PET muchikamu chekunyunguduka, kuderedza uremu hwemamorekuru.PET inofanirwa kunge yakaoma isati yagadzirwa, uye amorphous PET inoda kupenya isati yaomeswa kuitira kuti zvimedu zvisanamatirane pazvinoenda kunyangwe girazi richichinja.
Hydrolysis inogona kuitika nekuda kwekunyorova uye izvi kazhinji zvinogona kuonekwa sekuderedzwa kweIV (Intrinsic Viscosity) yechigadzirwa.PET inonzi "semi-crystalline".Apo IV inoderedzwa, mabhodhoro anowedzera brittle uye anowanzokundikana pa "gedhi" (injection point) panguva yekuputika nekuzadza.
Munzvimbo yayo ye "crystalline" ine zvese zviri zviviri crystalline uye amorphous zvikamu mune yayo molecular chimiro.Iyo crystalline chikamu chinokura apo mamorekuru anogona kuzvibatanidza mune yakanyanya compact linear chimiro.Munzvimbo dzisiri dzekristaro mamorekuru ari mune yakasarudzika marongero.Nekuita inshuwarisi kuti crystallinity yako yakakwirira, isati yagadziriswa, chigumisiro chichava chakafanana uye chepamusoro chigadzirwa.
ODE Yakagadzirwa IRD Infrared Rotary Drum Systems yakaita aya madiki-mafunctions nenzira ine simba-inoshanda zvakanyanya.Yakakosha yakagadzirirwa shortwave Infrared radiation inomutsa kushanduka kwemamorekuru mune yakaoma zvinhu zvakananga pasina kutora nhanho isingashande yepakati yekushandisa mweya unopisa.Kupisa kwakadai mukupisa uye nguva yekuomesa yakaderedzwa kusvika pachiyero che8.5 chete kusvika kumaminitsi makumi maviri zvichienderana nekushandiswa chaiko, nepo maawa akati wandei achifanirwa kuverengerwa kune yakajairika inopisa-mhepo kana yakaoma-mhepo masisitimu.
Infrared drying inogona kuvandudza zvakanyanya kushanda kwetwin-screw extruder nekuti inoderedza kuderedzwa kweiyo IV tsika uye inovandudza zvakanyanya kugadzikana kwemaitiro ese.
Nguva yekutumira: Feb-24-2022