Modifying Film Conversion and End-Use Characteristics with Mineral Reinforcement, 1996 Polymers, Laminations & Coatings Conference Proceedings
Mineral reinforcement of polyethylene films has been shown to increase extrusion efficiency and process output, and to improve the ductile performance of LLDPE films without a loss of stiffness. Mineral reinforcement may also be used to modify the surface characteristics of blown and cast polyethylene films. Film blocking of linear-low density (LLDPE), very-low/ultra-low density (VL/ULDPE), and metallocene-catalyzed PE (mPE) can be eliminated with mineral addition. Film surface energy is increased improving ink adhesion and ease of treating without increasing the film’s tendency to block. Film coefficient of friction (COF) can be modified without the use of migratory additives. Depending on polymer type and additive package, the COF of “barefoot” LLDPE, VL/ULDPE, and mPE films is generally reduced with mineral addition, while that of HMW-HDPE films is increased.
Modifying Film Conversion and End-Use Characteristics with Mineral Reinforcement, 1996 Polymers, Lam