Kubomi bethu, iikomityi zephepha ezilahlwayo azinamsebenzi. Nokuba zezokwamkela izalamane, abahlobo kunye nabathengi, okanye njengendlela yokwazisa, le komityi yephepha kufuneka isetyenziswe. Okwangoku, iikomityi zephepha ezilahlwayo ezithengiswayo zisetyenziswa kakhulu ziikomityi zephepha ezigqunywe yiPE kunye neekomityi zephepha ezigqunywe yiPLA. Zeziphi kwezi zinto zimbini ezingcono nezinobuhlobo nokusingqongileyo?
Iikomityi zephepha zemveli zihlala zisebenzisa umaleko we-PE coating kumphezulu wephepha elisezantsi ukuze zifumane ukusebenza okuhle kokungangeni manzi kunye nokusebenza okungenawoyela. Iikomityi zephepha ezigqunywe nge-PE aziboli, aziphindi zisetyenziswe, kwaye kunzima ukuziphinda zisetyenziswe. Iikomityi zephepha zemveli ezigqunywe nge-PE kunzima ukuziphinda zisetyenziswe kuba kunzima ukwahlula ifilimu ye-polyethylene kumphezulu wekomityi yephepha kwikomityi yephepha.
Izinto ze-PLA luhlobo olutsha lwezinto ezinokubola. Zizinto ezikhutshwa kwisitatshi sombona. Emva kokuba zisetyenzisiwe, zinokubola ziintsholongwane ezikwindalo phantsi kweemeko ezithile, kwaye ukubola ekugqibeleni kunokwenza i-carbon dioxide namanzi.
Iikomityi ezigqunywe ngePLA zihlala zinconywa njengendlela "enobuhlobo nokusingqongileyo" endaweni yeekomityi zephepha ezigqunywe ngePE, inyani kukuba iPLA ngokuyintloko yiplastiki kwaye ineengxaki ezifanayo neekomityi zephepha ezigqunywe ngePE. Ukubola kwe-PLA kufuneka kuhlangabezane neemeko ezimbini: ukufuma kwama-50%-60% kunye nobushushu obungama-50-70 degrees Celsius. Phantsi kwezi meko, kunokwenzeka ukuba iintsholongwane zibole kancinci kancinci i-PLA emva kweenyanga ezimbalwa okanye nangaphezulu. Nangona kunjalo, kunzima ukuba imeko-bume yendalo ifikelele kubushushu obufunekayo ukuze yonakale. Ukuba iimveliso ze-PLA zilahlwa ngokuthanda kwazo, azinakonakala ngokwenene. Ukuze yonakale i-PLA, kufuneka icutshungulwe kwimizi-mveliso kwiindawo ezikhethekileyo zokwenza umgquba. Enyanisweni, amazwe ambalwa anezi zakhiwo zoshishino.
Ukongeza, uphando lubonise ukuba izinga lokuwohloka kwe-PLA alinakwahlulwa kangako kweleplastiki eqhelekileyo emanzini acocekileyo nasemanzini olwandle. I-European Plastics Association ikwathe iiplastiki ezibolayo azinakuthathwa njengezinobuhlobo nokusingqongileyo kuneeplastiki zemveli ezingonakalisiyo. Ukuba iimeko zokuwohloka azifezekiswa, akukho mahluko phakathi "kweeplastiki ezibolayo" kunye neeplastiki eziqhelekileyo.
Nangona iikomityi zephepha ezigqunywe yiPLA zinokubola, ixabiso lezinto zePLA liphezulu ngokuphindwe kabini ukuya kathathu kunelePE, kwaye iindleko eziphezulu zezinto eziluhlaza zikhokelela kumaxabiso aphezulu. Ke ngoko, iikomityi zephepha ezilahlwayo ezisetyenziswa kakhulu kwimarike ziikomityi zephepha ezigqunywe yiPE.
Ixesha lokuthumela: Disemba-27-2022
