Izindaba

Eminyakeni yamuva, kunesistimu ye-multi-screw extruder esungulwe emakethe njengenye indlela ye-Single - screw extruder enesistimu yokomisa ngaphambili. (Lapha sibiza ama-multi-screw extrudering system afaka ama-Twin-screw extruder, ama-Planetary roller extruder njll.)

Kodwa sicabanga ukuthi kuyadingeka ukuba nesistimu yokomisa ngaphambili noma usebenzisa i-multi-screw extruder. Ngoba:

1) Izikhiphi ezinezikulufu eziningi ezinakho konke ziyizinhlelo eziyinkimbinkimbi kakhulu zokususa umoya ezifakwe ku-extruder ukuvimbela umphumela we-hydrolysis ukuthi ungenzeki ngenxa yokungafakwa kwenqubo yokomisa ngaphambilini. Ngokuvamile uhlobo olunjalo lwe-extruder luhlukile ekusebenziseni isimo:

Umswakama ophezulu wokuphakelayo ovumelekile akufanele ube ngaphezu kuka-3000 ppm (0.3 %)

Eqinisweni, ama-Bottle flakes abonisa ukuhluka kokuhlanzeka, usayizi wezinhlayiyana, ukusatshalaliswa kosayizi wezinhlayiyana nokuqina - futhi ikakhulukazi kumswakama. Ama-post-consumer flakes avumela ukugcina umswakama ofika ku-5,000 ppm emkhiqizweni kanye nokugcina izikhathi eziningi leli nani lamanzi phezu kwawo. Kwamanye amazwe, umswakama wesiphakeli ungafika ku-14,000 ppm noma upakishwe ku-Big Bag.

Kokubili izinga eliphelele lokuqukethwe kwamanzi nokuhluka kwawo, okungenakugwenywa, kuyinselelo yangempela ye-multi-screw extruder kanye nomqondo ohlobene wokususa umoya. Lokhu kuvame ukuphumela ekuguquguqukeni kwenqubo, okubonakala kusukela kungcindezi yokuphuma eguquguqukayo ngokwedlulele ye-extruder.Kungenzeka kakhulu ukuthi inani elikhulu lomswakamo lisasele njengoba lifinyelela esigabeni salo sokuncibilika ku-extruder ngenxa yezinga lomswakamo lokuqala ku-extruder. i-resin, kanye nenani elikhishwe ngesikhathi se-vacuum

2) I-PET ine-hygroscopic kakhulu futhi imunca umswakama ovela emkhathini. Umswakama omncane uzokhipha i-PET nge-hydrolyze esigabeni sokuncibilika, unciphise isisindo samangqamuzana. I-PET kumele yome ngaphambi nje kokucubungula, futhi i-amorphous PET idinga ukucwebezela ngaphambi kokuba yomiswe ukuze izinhlayiya zingabambeleli ndawonye njengoba zihamba ngenkathi ingilazi ishintsha.

I-Hydrolysis ingenzeka ngenxa yomswakama futhi lokhu ngokuvamile kungabonakala njengokuncipha kwe-IV (Intrinsic Viscosity) yomkhiqizo. I-PET "i-semi-crystalline". Lapho i-IV incishisiwe, amabhodlela aba brittle kakhulu futhi athambekele ekuhlulekeni “esangweni” (iphuzu lomjovo) ngesikhathi sokuvuthela nokugcwalisa.

Esimeni sayo “sekristalu” inezingxenye ezicwebezelayo nezingama-amorphous esakhiweni sayo samangqamuzana. Ingxenye ye-crystalline iqala lapho ama-molecule angakwazi ukuzivumelanisa khona nesakhiwo somugqa esihlangene kakhulu. Ezifundeni ezingezona i-crystalline ama-molecule ahlelwe ngokungahleliwe. Ngokuqinisekisa ukuthi i-crystallinity yakho iphezulu, ngaphambi kokucubungula, umphumela uzoba umkhiqizo ofanayo futhi ophezulu.

I-ODE Made IRD Infrared Rotary Drum Systems yenze le misebenzi emincane ngendlela eyonga kakhulu amandla. I-shortwave eklanyelwe ngokukhethekile imisebe ye-infrared ikhuthaza ukushintshashintsha kokushisa kwamangqamuzana ezintweni ezomile ngokuqondile ngaphandle kokuthatha isinyathelo esimaphakathi esingasebenzi kahle sokusebenzisa umoya oshisayo. Indlela yokushisisa enjalo ezikhathini zokushisa nezomisa iyancipha ibe yimizuzu engu-8.5 ukuya kwengama-20 kuye ngohlelo oluthile, kuyilapho amahora ambalwa kufanele abalwe kumasistimu omoya oshisayo noma owomile.

Ukomiswa kwe-infrared kungathuthukisa kakhulu ukusebenza kwe-twin-screw extruder ngoba kunciphisa ukuwohloka kwamanani e-IV futhi kuthuthukisa kakhulu ukuzinza kwayo yonke inqubo.