Kuyanika kwa infrared kumatha kwambirikupititsa patsogolo ntchito ya mapasa-screw extruder chifukwa amachepetsa kuwonongeka kwa mtengo wa IV ndipo amathandizira kwambiri kukhazikika kwa ndondomeko yonse.
Choyamba, PET regrind idzawunikiridwa ndikuwumitsidwa pafupifupi mphindi 15-20 mkati mwa IRD.Njira yowumitsa ndi kuyanika iyi imatheka ndi njira yowotchera mwachindunji pogwiritsa ntchito ma radiation ya infuraredi kuti akwaniritse kutentha kwa 170 ° C.Poyerekeza ndi makina oyenda pang'onopang'ono a mpweya wotentha, kulowetsa mphamvu mwachangu komanso mwachindunji kumathandizira kuti pakhale kusinthasintha kosinthika kwa chinyezi - makina owongolera ma radiation a infrared amatha kuyankha pakusintha kwazinthu mumasekondi.Mwanjira iyi, mtengo wa 5,000 mpaka 8,000 ppm mkati mwa IRD umachepetsedwa mofanana ndi chinyezi chotsalira cha 150-200 ppm.
Monga chotsatira chachiwiri cha njira ya crystallization mu IRD, kuchulukitsitsa kwazinthu zowonongeka kumawonjezeka, makamaka muzitsulo zolemera kwambiri.Mu chikhalidwe ichi:IRD ikhoza kuonjezera kachulukidwe kachulukidwe ndi 10% mpaka 20%, zomwe zingawoneke kusiyana kochepa kwambiri, koma zimatha kupititsa patsogolo ntchito ya chakudya pamalo olowera kunja - ngakhale kuthamanga kwa extruder kumakhalabe komweko, kumatha kusintha kwambiri ntchito yodzaza wononga.
Monga njira ina yosinthira kutentha kwambiri kwa crystallization ndi kuyanika makina, makina a IRD amathanso kupangidwa ngati chowumitsira mwachangu kuti chizigwira ntchito bwino komanso pakuyanika kutentha kosachepera 120 ° C.Pankhaniyi, chinyezi chomwe chingapezeke chidzangokhala "kokha" pafupifupi 2,300 ppm, koma motere chikhoza kusungidwa modalirika, makamaka mkati mwazinthu zomwe zimatchulidwa ndi wopanga extruder.Chinthu chinanso chofunikira ndikupewa kusinthasintha kwapamwamba komanso kosatha kwa mtengo, ndi kuchepa kwa chinyezi mpaka 0.6% zomwe zingachepetse kwambiri gawo la IV muzinthu zapulasitiki zosungunuka.Nthawi yokhala mu chowumitsira imatha kuchepetsedwa kukhala mphindi 8.5 ndipo kugwiritsa ntchito mphamvu kumakhala kosakwana 80 W / kg / h.
Nthawi yotumiza: Feb-24-2022