The Effect of Molecular Characteristics Disparity of EVA/LDPE on its Cross-linked Blend Foam Density, Compression Set and Gel Content

The effect of melt flow index (MFI) and vinyl acetate content (VA%) of EVA copolymer on its crosslinked blend with 5 Phr LDPE foams were investigated and compared with an industrial shoe sole. The melt flow index of EVA increase from 2.5 to 25 g/10 min and its VA% increase from 18 to 28 enhanced the blend foam density and gel content in xylene from 0.68 to 0.92 g/cm3 and 0.75 to 1, respectively. It also decreased the sample compression set from 31 to 14%. The average cell size of the crosslinked blend foams were 680 and 460 μm, respectively.