Hariho ubwoko bwinshi bwamabati ya plastike hamwe nuburyo butandukanye bwo gukoresha. Kugeza ubu, ubwoko nyamukuru ni polyvinyl chloride, polystirene na polyester (PET). Urupapuro rwa PET rufite imikorere myiza kandi rwujuje ibyangombwa bisabwa mu rwego rw’isuku ku bicuruzwa bibumbwe hamwe n’ibisabwa kurengera ibidukikije mpuzamahanga. Nibiri kumeza yo kurengera ibidukikije. Kugeza ubu, gupakira bigomba kuba byujuje ibisabwa byo kurengera ibidukikije no gutunganya ibicuruzwa, bityo rero ibisabwa ku mpapuro za PET bigenda byiyongera. Iyi ngingo ivuga cyane cyane kubikorwa byumusaruro nibibazo bisanzwe byimpapuro za PET.
PET ikora tekinoroji yo gukora:
(1) URUPAPURO
Kimwe na plastiki zindi, imiterere yurupapuro rwa PET ifitanye isano rya bugufi nuburemere bwa molekile. Uburemere bwa molekuline bugenwa nubwiza bwimbere. Iyo hejuru yimitsi yimbere, nibyiza kumubiri nu miti, ariko amazi mabi hamwe ningorabahizi. Hasi yimbere yimbere, niko imiterere yumubiri na chimique nimbaraga zingaruka. Kubwibyo, ubwiza bwimbere bwurupapuro rwa PET bigomba kuba 0.8dl / g-0.9dl / g.
(2) Gahunda yumusaruro
Ibyingenziibikoresho byo gukora kumpapuro za PETikubiyemo iminara ya kristu, iminara yumye, extruders, imitwe ipfa, kalendari yimizingo itatu hamwe na coiler. Igikorwa cyo kubyaza umusaruro ni: ibikoresho fatizo byo korohereza-gukama-gukuramo plastike-gukuramo ibishushanyo mbonera-byerekana-ibicuruzwa.
1. Kurira. Ibice bya PET birashyuha kandi bigashyirwa mu munara wa kristu kugirango uhuze molekile, hanyuma wongere ubushyuhe bwikirahure bwikirahure bwibice kugirango wirinde gufatira hamwe no gufunga hopper mugihe cyo kumisha. Crystallisation ni intambwe yingenzi. Crystallisation ifata iminota 30-90 kandi ubushyuhe buri munsi ya 149 ° C.
2.Kama. Ku bushyuhe bwinshi, amazi azahindura hydrolyze kandi atesha agaciro PET, bikaviramo kugabanuka kwifata ryayo, kandi imiterere yumubiri, cyane cyane imbaraga zingaruka, bizagabanuka uko uburemere bwa molekile bugabanuka. Kubwibyo, mbere yo gushonga no gusohora, PET igomba gukama kugirango igabanye ubuhehere, bugomba kuba munsi ya 0.005%. Dehumidification yumye ikoreshwa mugukama. Bitewe na hygroscopique yibikoresho bya PET, mugihe amazi yinjiye cyane mubice byigice, hazashyirwaho imiyoboro ya molekile, kandi ikindi gice cyamazi kizinjira cyane mubice, bigatuma gukama bigorana. Kubwibyo, umwuka ushyushye ntushobora gukoreshwa. Ikime gishyushye gishyushye gisabwa kuba munsi ya -40C, kandi umwuka ushyushye winjira mu cyuma cyumye unyuze mumuzinga ufunze kugirango ukomeze.
3. Gufata. Nyuma yo korohereza no gukama, PET ihindurwamo polymer hamwe nikintu kigaragara cyo gushonga. Ubushyuhe bwa polymer ni hejuru kandi igipimo cyo kugenzura ubushyuhe ni gito. Inzira ya polyester yihariye ikoreshwa mugutandukanya ibice bidashongeshejwe gushonga, bifasha gukomeza inzira ndende kandi byongera umusaruro wa extruder. Yemera iminwa yoroheje ipfa hamwe na trottle inkoni. Umutwe wububiko urafashwe. Kwiruka biruka hamwe niminwa idafite iminwa yerekana ko kurangiza bigomba kuba byiza. Ubushuhe bubumba bufite ibikorwa byo kumena no gukora isuku.
4.Gukonja no gushiraho. Nyuma yo gushonga bivuye mumutwe, byinjira muburyo butaziguye kuri kalendari eshatu kugirango uhindure kandi ukonje. Intera iri hagati ya kalendari eshatu na kashe ya mashini muri rusange ibikwa nka 8cm, kuko niba intera ari nini cyane, ikibaho kizahita cyunvikana kandi kijimye, bikavamo kurangiza nabi. Byongeye kandi, kubera intera ndende, gukwirakwiza ubushyuhe no gukonjesha biratinda, kandi kristu ihinduka umweru, ibyo bikaba bitajyanye no kuzunguruka. Igice cya kalendari eshatu kigizwe hejuru, hagati na hepfo. Uruziga rwa roller rwagati rurakosowe. Mugihe cyo gukonjesha no gutanga ingengabihe, ubushyuhe bwa roller ni 40 ° c-50c. Igiti cyo hejuru no hepfo gishobora kuzamuka hejuru.
Igihe cyo kohereza: Nzeri-28-2023
