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EVA plastic fi lm is the key material for V-process. Through decades of research, special EVA fi lm for V-process has been produced. The fi lm has adequate elongation; its maximum is about 800% in longitudinal direction and 750% in transversal direction. The single width of the fi lm is 2.8 m and the double width is 5.6 m, which is the widest sheet fi lm for V-process in China. Sheets with different thickness ranging from the thickest 0.35 mm to the thinnest 0.08 mm can meet different demandsdoaj:971c5725fe484e238c81d2f336c57e60 fatcat:igv3z2wbgbhsphyv2dxmmjtxf4