Impamvu enye zingenzi zitera gushira imifuka yibikoresho bya plastike ya EVA

Nizera ko abantu benshi bahangayikishijwe cyane nikibazo cya plastike igenda ishiraImifuka y'ibikoresho bya EVA, none niki gitera imifuka yibikoresho gushira? Kugabanuka kw'ibicuruzwa bifite amabara ya pulasitike bifitanye isano no kurwanya urumuri, kurwanya ogisijeni, kurwanya ubushyuhe, aside na alkali birwanya pigment n'amabara, hamwe n'imiterere ya resin yakoreshejwe. Reka tubisesengure muri make hepfo.

1. Kurwanya Acide na alkali Kugabanuka kw'ibicuruzwa bya pulasitiki by'amabara bifitanye isano no kurwanya imiti y’ibara (aside irwanya alkali, irwanya redox).

Kurugero, molybdenum chromium itukura irwanya aside aside, ariko yunvikana kuri alkali, kandi umuhondo wa kadmium ntabwo urwanya aside. Izi pigment ebyiri hamwe na resinike ya fenolike bigira ingaruka zikomeye zo kugabanya amabara amwe, bigira ingaruka zikomeye kubirwanya ubushyuhe no guhangana nikirere byamabara kandi bigatera gushira.

2. Antioxyde: Pigment zimwe na zimwe zigabanuka buhoro buhoro bitewe no kwangirika kwa macromolecules cyangwa izindi mpinduka nyuma ya okiside.

Ubu buryo burimo okiside yubushyuhe bwo hejuru mugihe cyo gutunganya no okiside mugihe uhuye na okiside ikomeye (nka chromate yumuhondo wa chromium). Iyo ibiyaga, azo pigment hamwe na chrome yumuhondo bivanze, ibara ry'umutuku rizashira buhoro buhoro.
3. Ubushyuhe bwumuriro bwibintu bitarwanya ubushyuhe bivuga urwego rwo kugabanuka kwubushyuhe bwumuriro, amabara, hamwe no kugabanuka kwa pigment munsi yubushyuhe.

Ibimera bidafite umubiri bigizwe na oxyde yumunyu nu munyu, bifite ubushyuhe bwiza bwumuriro kandi birwanya ubushyuhe bwinshi. Pigment zakozwe mubintu kama kama bizahinduka mumiterere ya molekile hamwe no kubora kubushyuhe runaka. Cyane cyane kubicuruzwa bya PP, PA, na PET, ubushyuhe bwo gutunganya buri hejuru ya 280 ° C. Mugihe duhitamo amabara, kuruhande rumwe, tugomba kwitondera kurwanya ubushyuhe bwa pigment, kurundi ruhande, tugomba gutekereza igihe cyo guhangana nubushyuhe bwa pigment. Igihe cyo kurwanya ubushyuhe mubisanzwe ni 4-10. .

4. Umucyo Umucyo wamabara agira ingaruka zitaziguye kubicuruzwa.

Kubicuruzwa byo hanze byerekanwa numucyo ukomeye, urumuri (izuba ryizuba) urwego rwamabara yakoreshejwe nikimenyetso cyingenzi. Niba urwego rwumucyo rukennye, ibicuruzwa bizashira vuba mugihe cyo gukoresha. Urwego rwo kurwanya urumuri rwatoranijwe kubicuruzwa birwanya ikirere ntibigomba kuba munsi yurwego rwa gatandatu, kandi nibyiza guhitamo urwego rurindwi cyangwa umunani. Kubicuruzwa byo murugo, urwego rwa kane cyangwa gatanu rushobora gutoranywa.

Kurwanya urumuri rwabatwara resin nabyo bigira uruhare runini muguhindura ibara. Iyo resin imaze kuraswa nimirasire ya ultraviolet, imiterere ya molekile yayo irahinduka kandi ibara rigashira. Ongeramo urumuri rwumucyo nka ultraviolet yinjiza mumashusho yambere birashobora kunoza urumuri rwamabara nibicuruzwa bya plastiki byamabara.