The effect of use-connected impurities on the processing and mechanical properties
of low density polyethylene
The effect of the content of impurities in the scrap low-density polyethylene (PE-LD) (films from fertilizer bags, agricultural and packaging films) on a series of processing and mechanical properties of this material as well as on the process of film blowing has been investigated. It has been shown that imnurities cause a decrease of bulk density and angle of slide as well as of melt f low index. They have however no effect of the tensile strength and lower the relative elongation at break. At higher contents of impurities the extrusion efficienev of PF-LD decreases and product quality deteriorates.
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