Izindaba

Eminyakeni yamuva nje, kusungulwe uhlelo lwe-multi-screw eyenzelwe emakethe njengenye indlela yokuhlanza okukodwa ngohlelo lokusoma kwangaphambili. (Lapha sibiza uhlelo olunyulukisa ama-screw excrew excrew kufaka phakathi ama-twin-screw extres, iplanethi roller extreper njll.)

Kepha sicabanga ukuthi kuyadingeka ukuba nohlelo lokusoma ngaphambi kokusebenzisa i-multi-screw extred. Ngoba:

1) I-multi-screw extredrers enakho konke okunezinhlelo eziyinkimbinkimbi kakhulu ze-vacuum-degassing systems ezifakwe ku-extrolyser ukuvikela umphumela we-hydrolysis kusuka ku-Ayikho inqubo yangaphambi kokukhishwa. Imvamisa uhlobo olunjalo lwe-extreder ehlukile kusetshenziswa isimo:

Ubukhulu obuvumelekile bondla bondlayo akufanele bube buphakeme kune-3000 ppm (0.3%)

Eqinisweni, amabhodlela amabhodlela akhombisa ukuhlukahluka ngobumsulwa, usayizi wezinhlayiyana, ukusatshalaliswa kosayizi wezinhlayiyana nobukhulu - futhi ikakhulukazi kumswakama. Ama-flakes athunyelwe abathengi avumela ukugcinwa cishe cishe ku-5,000 ppm yomswakama emkhiqizweni nasekugcinweni kaninginingi leli nani lamanzi ebusweni bawo. Kwamanye amazwe, umswakama wondla okondla ungafinyelela ku-14,000 ppm ngisho nokupakishwa esikhwameni esikhulu.

Kokubili izinga eliphelele lokuqukethwe kwamanzi kanye nokwehluka kwalo, okungavikelekile, yinselele yangempela ye-extred exkerude ye-multi-screw kanye nomqondo ohlobene nodom. Lokhu kuvame ukuba nomphumela ekuguqukeni kwenqubo, okubonakalayo kusuka ekucindezelweni okungafani ngokweqile kwe-extruder.it kungenzeka kakhulu ukuthi inani elikhulu lomswakama lisasele njengoba lifinyelela esigabeni salo sokuncibilika ngenxa ye-resin, futhi inani elisusiwe ngesikhathi se-resin, kanye nenani elisusiwe ngesikhathi se-vacuum

2) I-PET i-hygroscopic kakhulu futhi imunca umswakama ovela emkhathini. Amanani amancane omswakama uzohlala eHydrolyze Pet esigabeni sokuncibilika, anciphise isisindo se-molecular. Isilwane kufanele some ngaphambi nje kokucutshungulwa, kanti isilwane esise-Amorphous sidinga i-crystalliting ngaphambi kokomiswa ukuze izinhlayiya zinganamatheli ndawonye njengoba zihamba.

I-Hydrolysis ingenzeka ngenxa yomswakama futhi lokhu kuvame ukubonwa njengokuncishiswa kwe-IV (ubuhlakani obuphakathi) bomkhiqizo. Isilwane "se-semi-crystalline". Lapho i-IV incishisiwe, amabhodlela angaphezulu futhi athambekele ekwehluleka "kwesango" (Iphoyinti Lommeli) ngesikhathi sokushaya nokugcwaliswa.

Kusho lwayo "Crystalline" lisho ukuthi linezingxenye zombili ze-crystalline nezempikiswano ezakhiweni zalo ze-molecular. Ingxenye ye-Crystalline ikhula lapho ama-molecule angayivumelanisa ngokwawo esakhiweni esiqondile esinemigqa. Ezifundeni ezingezona ze-crystalline ama-molecule asehlelweni elingahleliwe. Ngokuvikela ukuthi i-crystallity yakho iphakeme, ngaphambi kokucubungula, umphumela uzoba umkhiqizo ofanayo futhi ophakeme.

I-Ode yenziwe ama-rotary Dourary Durmary Durm Systems asenze le misebenzi engezansi ngendlela esebenza kahle kakhulu. Imisebe ekhethekile eyenzelwe i-shortwave infrared infrared ivuselela ukuguquguquka kokushisa kwe-molecular entweni eyomile ngqo ngaphandle kokuthatha igxathu elisebenzayo lokusebenzisa umoya ovuthayo. Ukushisa okunjalo ekushiseni nasezikhathini zokumisa kuncishiswa ebangeni lemizuzu engu-8,5 kuze kube yimizuzu engama-20 kuye ngohlelo oluthile, kanti amahora ambalwa kufanele abelwe ngezinhlelo ezijwayelekile zomoya noma zomoya owomile.

Ukomiswa kwe-infrared kungathuthukisa kakhulu ukusebenza kwe-twin-screw extreder ngoba kunciphisa ukucekelwa phansi kwamanani we-IV futhi kuthuthukise kakhulu ukuqina kwayo yonke inqubo.