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

摘要

The improvement in physical property performance of first generation metallocene catalyzed linear low-density polyethylene (mLLDPE) over Ziegler-Natta (Z/N) LLDPE is counterbalanced by a decrease in processability: higher extruder pressures, more energy consumption and decreased bubble stability. NOVA Chemicals has developed a new class of single-site catalyzed LLDPE called SURPASS™ (sLLDPE) which overcomes the processability issues encountered with the traditional mLLDPE, while maintaining the enhanced physical property performance.rnThis paper focuses on:rn1. 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 .rn2. The comparison of bubble stability and maximum output of sLLDPE with conventional mLLDPE's resins.rn3. The application of analytical methods to predict resins' processability and bubble instability.