Infrared bushewa iya muhimmanciinganta aikin tagwaye-screw extruder saboda yana rage raguwar darajar IV kuma yana inganta kwanciyar hankali na dukan tsari.
Na farko, za a yi crystallized regrind na PET kuma a bushe a cikin kusan mintuna 15-20 a cikin IRD. Ana samun wannan tsari na crystallization da bushewa ta hanyar hanyar dumama kai tsaye ta amfani da radiation infrared don cimma yanayin zafin jiki na 170 ° C. Idan aka kwatanta da jinkirin tsarin iska mai zafi, shigarwar makamashi mai sauri da kai tsaye yana ba da gudummawa ga daidaitaccen ma'auni na madaidaicin ma'auni mai canzawa ta dindindin - tsarin sarrafa hasken infrared na iya amsawa ga canza yanayin tsari a cikin daƙiƙa. Ta wannan hanyar, ƙimar da ke cikin kewayon 5,000 zuwa 8,000 ppm a cikin IRD an rage shi daidai gwargwado zuwa ragowar ɗanɗanon abun ciki na kusan 150-200 ppm.
A matsayin sakamako na biyu na tsari na crystallization a cikin IRD, yawan adadin abin da aka murƙushe yana ƙaruwa, musamman a cikin ƙananan ƙananan nauyi. A cikin wannan yanayin:IRD na iya ƙara yawan ƙimar da kashi 10% zuwa 20%, wanda zai iya zama ɗan bambanci sosai, amma yana iya haɓaka aikin ciyarwa a mashigar extruder - kodayake saurin fitar da iska ya kasance iri ɗaya, yana iya haɓaka aikin cikawa.
A matsayin madadin babban tsarin crystallization da bushewa, tsarin IRD kuma ana iya tsara shi azaman na'urar bushewa mai sauri don aiki da inganci kuma a bushewar zafin jiki ƙasa da 120 ° C. A wannan yanayin, damshin abun ciki da aka samu zai iyakance ga "kawai" game da 2,300 ppm, amma ta wannan hanyar za a iya dogara da shi, musamman a cikin kewayon ƙimar da masana'antun extruder suka ayyana. Wani muhimmin al'amari shine nisantar babban canji na dindindin a cikin darajar, tare da rage yawan danshi har zuwa 0.6% wanda zai rage girman ma'aunin IV a cikin narkakken kayan filastik. Za'a iya rage lokacin zama a cikin na'urar bushewa zuwa mintuna 8.5 kuma yawan kuzarin ya kasance ƙasa da 80 W / kg / h
Lokacin aikawa: Fabrairu-24-2022