Effect of Antiblock Particle Size on Die Lip Build-Up Resulting in V-Smears in Blown Film, 1998 Polymers, Laminations & Coatings Conference Proceedings
The accumulation of deposits on the external surface of the die, commonly referred to as die lip build-up, has plagued the extrusion industry for many years. Frequent die cleaning, costly shutdowns, and lost production equates to lost revenue and profitability. Much research has been dedicated to identifying the source of die lip build-up, minimizing the build-up and extending the time between die cleanings. This paper summarizes over twelve years of investigative study and offers at least one method of minimizing the negative effects.
This paper will focus on die lip build-up associated with antiblock particle size distribution. Also, die lip build-up will be defined as the accumulation of polyethylene on the external surface of a die. V-Smears are defined as the surface defects caused when polymer build-up breaks free from the die and becomes attached to the film surface.
Effect of Antiblock Particle Size on Die Lip Build-Up Resulting in V-Smears in Blown Film, 1998 Poly