Metallocene LLDPE offers high clarity and downgauging ability in film

LyondellBasell announced the North American commercial launch of a new line of metallocene linear low-density polyethylene (mLLDPE), which it says exhibits the high dart impact/puncture resistance, organoleptics, clarity, and hot-tack and heat-seal performance metallocene resins are known for. Starflex production came online earlier this year, with the material to target high-performance film applications in food and medical packaging, shrink wrap, and heavy duty shipping sacks, among others. Stephen Imfeld, LyondellBasell’s new business development manager for polyethylene flexible applications in the Americas, told PlasticsToday that compared to conventional LLDPE materials Starflex resins allow processors to downgauge flexible packages and realize material savings and improved sustainability.

Imfeld said that at this time, there are six commercial products available based on three reactor grades, and the company is actively pursuing opportunities for additional grades. The key differences between the grades, which are based on Univation metallocene technology, are melt index, density, and additives. Two grades feature slip and antiblock additives, with another only offering antiblock. Base resin density ranges from .912 to .918. At this time, Starflex is produced at LyondellBasell’s Morris, IL LLDPE plant where Imfeld said the company is targeting annual production capacity exceeding 200 million lb. Imfeld noted that if needed, the company has the capability to expand to other assets. —Tony Deligio