Abstract: The block resistance of pellets of copolymers of ethylene with acrylic or methacrylic acid is improved by addition of very low levels of certain defined liquid additives or water-soluble solid additives. This results in improved rates of pellet production, and in easier subsequent handling.

Abstract: An improved rotary melt cutter capable of accommodating a wide variation in polymer melt viscosities and melt characteristics is provided by use of a controlled pressure spring mechanism which operates in conjunction with each of several independently articulated knife-assemblies of the cutter. The knife-blade cutting-edges thereby maintain near-zero clearance from an extruder die-face from which polymer strands are being extruded. The cutter operates more effectively with less interruption and fouling than cutters of similar design but which utilize hydraulic pressure as the means of maintaining near-zero clearance.