Ukomiswa kwe-infrared kungaba kakhulungcono ukusebenza kwe-twin-screw extruder ngoba yehlisa ukuwohloka kwevelu ye-IV futhi ithuthukisa kakhulu ukuzinza kwayo yonke inqubo.
Okokuqala , i-PET regrind izokwenziwa i-crystallized futhi yomiswe cishe imizuzu engu-15-20 ngaphakathi kwe-IRD.Le nqubo ye-crystallization kanye nokomisa ifinyelelwa ngenqubo yokushisa eqondile kusetshenziswa imisebe ye-infrared ukuze kuzuzwe izinga lokushisa elingu-170 °C.Uma kuqhathaniswa nezinhlelo zomoya oshisayo ezihamba kancane, okokufaka kwamandla asheshayo naqondile kunomthelela ebhalansini ephelele yamanani omswakama okokufaka ashintshashintshayo - amasistimu okulawula imisebe ye-infrared angasabela ekushintsheni kwezimo zenqubo ngemizuzwana.Ngale ndlela, inani kububanzi obungu-5,000 kuya ku-8,000 ppm ngaphakathi kwe-IRD lehliswa ngokufanayo libe umswakama osele ongaba ngu-150-200 ppm.
Njengomphumela wesibili wenqubo ye-crystallization ku-IRD, ukuminyana kwenqwaba yezinto ezichotshoziwe kuyanda, ikakhulukazi kuma-flakes wesisindo esincane kakhulu.Kulesi simo:I-IRD ingakhuphula ukuminyana kwenqwaba ngo-10% kuya ku-20%, okungase kubonakale kumehluko omncane kakhulu, kodwa kungathuthukisa kakhulu ukusebenza kokuphakelayo endaweni yokufaka i-extruder - nakuba ijubane le-extruder lihlala lifana, lingathuthukisa kakhulu ukusebenza kokugcwalisa isikulufu.
Njengenye indlela ye-crystallization yokushisa ephezulu kanye nezinhlelo zokomisa, uhlelo lwe-IRD lungaphinda luklanywe njengesisomisi esisheshayo ukuze sisebenze kahle futhi ezingeni lokushisa elingaphansi kuka-120 °C.Kulokhu, umswakama ozuziwe uzokhawulelwa "kuphela" cishe ku-2,300 ppm, kodwa ngale ndlela ungagcinwa ngendlela enokwethenjelwa, ikakhulukazi phakathi kwebanga lamanani ashiwo umenzi we-extruder.Esinye isici esibalulekile ukugwema ukuguquguquka okuphezulu nokuhlala njalo kwevelu, ngokuncipha komswakama okufika ku-0.6% okuzonciphisa kakhulu ipharamitha ye-IV ezintweni zepulasitiki ezincibilikisiwe.Isikhathi sokuhlala endaweni yokomisa singancishiswa sibe yimizuzu eyi-8.5 futhi ukusetshenziswa kwamandla kungaphansi kwama-80 W / kg / h.
Isikhathi sokuthumela: Feb-24-2022