January 27, 2021 SHIRLEY, Mass. â January 27, 2021 â Bemis Associates â a manufacturer of thermoplastic films, tapes, and adhesives for bonding â in partnership with DuPont Tate & Lyle Bio Products, is announcing the launch of its first Sewfree® product made using renewable material. Biobased Sewfree 3700 has been developed utilizing 25-percent bio-based Susterra® propanediol from DuPont Tate & Lyle Bio Products, a renewably sourced, plant-based building block that delivers high performance across a wide variety of polymer applications. Susterra propanediol is a molecular building block that forms a key part of the polyurethane structure, resulting in a direct beneficial impact to carbon footprint as compared to standard petrochemical polyurethane building blocks.