Blending Novapol~R Tubular LDPE in Autoclave LDPE for Extrusion Coating Applications

摘要

In general autoclave LDPE outperforms tubular LDPE with respect to neck-in. The draw down limit for tubular LDPE on the other hand is higher than for autoclave. The work presented here provides technical details of the benefits of blending tubular LDPE with autoclave LDPE for extrusion coating applications. For a lab scale line, it is shown that at 30 to 50% tube resin content, a blended product performs at least equivalent to a 100% autoclave resin in that the blends showed acceptable neck-in performance but had higher drawdown speed and improved adhesion. This only holds true if the proper selection of blend components is made. A guideline is suggested as to how to make this blend selection.