Optimizing the Benefits of Film Mineral Reinforcement: Interactions of Film and Concentrate Base Resins, 1996 Polymers, Laminations & Coatings Conference Proceedings
This study was conducted to determine the effect of three different calcium carbonate concentrates on the mineral reinforcement property response of films based on four different LLDPE resins. Each base resin was run neat (0% mineral) and reinforced with 13% and 26% of each concentrate type (10 & 20% CaCO3 ). Major differences were observed in the film properties and their response to concentrate addition. These differences are most likely related to rheology/viscosity match between concentrate and base resin, polymer/concentrate melting points, and the polymeric methods utilized in achieving high performance. Among the latter methods would be increased molecular weight/reduced melt index, narrowing of the molecular weight distribution, or modification of the short-chain branching distribution in the polymer.
Optimizing the Benefits of Film Mineral Reinforcement: Interactions of Film and Concentrate Base Res