Gupfunyika firime, bizwi kandi nka firime irambuye cyangwa firime igabanya ubushyuhe. Filime yo gupfunyika hakiri kare hamwe na PVC nkibikoresho fatizo. Ariko, kubera ibibazo by ibidukikije, ibiciro byinshi, hamwe no kurambura nabi, yagiye isimburwa buhoro buhoro na firime ya PE. PE gupfunyika PE ifite ibyiza bikurikira: Hejuru ...
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