COF & Blocking in mLLDPE Film: Why Don't My Recipes Work?, 1999 Polymers, Laminations & Coatings Conference Proceedings

Dr. Prakash Pate1 and Dr. Nilesh Savargaonkar

Ampacet Corporation

Increasing number of customers arc using metallocene polymers due to the general trend of running “hotter. thinner and faster”. We would like to learn more about the metallocene catalyzed polymers in general and would like to study the behavior of various additives in these polymers so that proper recommendations can be made to the customers using these polymers. Slips and antiblocks. being the most commonly used commodity additives, were selected first for this study.

The objectives of this project were as follows:

(1) Understand the diffusional behavior of slips in metallocene based polyethylenes and compare them to

Z-N based polyethylenes.

(2) Determine the optimum levels of slip and antiblocks required in metallocene LLDPEs to get a

coefficient of friction (COF) equivalent to Z-N based LLDPEs.

(3) Understand the effect of polymer density on COF. blocking and slip migration

(4) Examine the effect of long chain branching on COF. blocking and slip migration. by comparing

metallocene LLDPEs with and without LCB. of the same density

(5) Examine the quantity of two types of slips needed in various metallocene resins,