Icyayi (nanone icyayi-itara, itara ryicyayi, buji yicyayi, cyangwa icyayi kitemewe, t-lite cyangwa t-buji) ni buji mu cyuma cyoroshye cyangwa igikombe cya plastiki kugirango buji ibashe gutemba burundu mugihe yaka. Mubisanzwe ni bito, bizunguruka, bigari kuruta uburebure bwabo kandi ntibihendutse.

Amatara y'icyayi ni akantu gato, gakunzwe cyane kumurika no gukwirakwiza impumuro nziza, ariko igihe cyose ufite urumuri rufunguye, ufite amahirwe yo gucana no kuva kubutegetsi. Koresha ubwitonzi igihe cyose utwitse ibishashara bishonga cyangwa buji zidafite amashanyarazi.

Amatara yicyayi akorwa niki? Hariho ubwoko bwinshi bwibishashara, kandi ubwoko butandukanye bwibishashara bifite ingingo zitandukanye zo gushonga. Gushonga ibishashara bya paraffin ni 57 ~ 63 ℃, ibishashara bya polyethylene ni 102-115 ℃, ibishashara bya EVA ni 93-100 ℃, ibishashara bya PP ni 100 ~ 135 ℃. Hariho kandi ibishashara bidasanzwe byinganda bifite aho bishonga bishobora kugera kuri 150 xIgishashara cyera gitunganijwe gifite aho gishonga cya 59.3 ℃ gifite aho gihurira cya 295 ℃, aho cyo gutwika cya 258 ℃ na flash point ya 220 ℃. Ingingo itetse ahanini iri hagati ya 300 ~ 550 ℃.

Mugihe cyo gutwikwa, buji iba yoroshye kandi idafite ishusho, igishashara cyicyayi cyicyayi kirashobora gushyuha byoroshye cyane gutwika ibikoresho bikikije umuriro. Shira buji yicyayi kure yikintu cyaka. Inzira nziza yo kubungabunga ibidukikije byaka neza kuri buji yoroheje yicyayi nukugumya buji kure yikintu cyose cyaka, abana ninyamanswa. Ntugashyire buji hafi yumwenda cyangwa indi myenda, kandi ntuzigere ushyira buji munsi yikintu cyose gishobora gufata umuriro. Irinde gushyira buji yicyayi hejuru yubuso bwa plastiki, kabone niyo yaba iri mubifata, kuko ubushyuhe bushobora gutera umuriro. Bika buji ahantu hafunguye kandi uzishimira amasaha menshi uhereye kuri buji yicyayi kandi uzarinda urugo rwawe umutekano.