Invista: New Low-Melt, Sealing-Grade Polyester Polymer

Continuous polyester polycondensation pilot line in Gersthofen, Germany.

INVISTA, one of the world’s largest integrated polymers and fibers producers, has added Polyclear® Seal PET 7001/7003 for low-melt applications to its sealing-grade PET polymers portfolio. Polyclear® Seal PET 7001 and 7003 were developed and further optimized on INVISTA’s continuous polyester polycondensation pilot line in Gersthofen, Germany.

“Polyclear® Seal PET 7001 and 7003 addresses the market need for a low-melt, sealing grade PET polymer. Both polymers feature exceptional performance in use, with the primary difference being Polyclear® Seal PET 7001 is produced with an alternative catalyst,” said Ottmar Schmidt, INVISTA Polymer and Resins general manager for Europe. “The continuous polyester polycondensation pilot line was the cornerstone asset in the development of these polymers, as well as other polyester polymers from INVISTA, including PolyShield® resin.”

The continuous pilot line is heavily utilized by INVISTA for testing and developing polyester polymers, process improvements and modifications, and to support commercial scale production trials. Due to increased requests by customers, INVISTA has opened this asset to external parties interested in material and process development or small scale production campaigns of polyester for fiber, film, containers and engineering resins applications.

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The continuous pilot line has a nameplate capacity of 40 kg/h with a throughput ranging from 20 kg/h to 56 kg/h. Dosing points for additives covering all stages of the process are positioned throughout the line, including the capability of feeding liquid (molten) additives into the post finisher transfer line.

More Information: www.invista.com, www.polymers.invista.com

INVISTA Resins & Fibers GmbH, Hattersheim am Main, Germany

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