Effects of Concentrate Carrier Resin on the Physical Properties of Low Density Polyetheylene Blown Film, 1990 Polymers, Laminations & Coatings Conference Proceedings

The use of color concentrates is one of the most popular methods of coloring thermoplastic materials. The concentrate approach to coloring introduces a small amount of a different resin from the concentrate into the polymer system which can affect the physical properties of the final product.

This study examines the effect of four different color concentrate carrier resins on the physical properties of blown film made from low density polyethylene. Each concentrate was used in blown film at three different levels (1.5, 3.0, and 5.0% TiO2 loading) and three film gauges (1.0, 1.5 and 2.0 mils) in order to observe changes in the physical properties as the amount of concentrate increases. The carrier resins include low density polyethylene (LDPE), linear low density polyethylene high density polyethylene (LLDPE), and (HDPE) ethylene vinyl acetate copolymer. (EVA) Data presented in this study should allow the blown film producer to anticipate the physical properties of the final film product when using different types of concentrates.