Bubble Stability and Maximum Output of SURPASS TM Slldpe Resin in Blown Film

摘要

The improvement in physical property performance of first generation metallocene catalyzed linear low-densitypolyethylene (mLLDPE) over Ziegler-Natta (Z/N) LLDPE is counterbalanced by a decrease inprocessability: higher extruder pressures, more energy consumption and decreased bubble stability. NOVAChemicals has developed a new class of single-site catalyzed LLDPE called SURPASS TM (sLLDPE) whichovercomes the processability issues encountered with the traditional mLLDPE, while maintaining theenhanced physical property performance.This paper focuses on:1. The effect of blow-up ratio, temperature profiles, film gauge and blend composition(LDPE/LLDPE) on blown film bubble instability and maximum output for sLLDPE .2. The comparison of bubble stability and maximum output of sLLDPE with conventionalmLLDPE’s resins.3. The application of analytical methods to predict resins’ processability and bubble instability.