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Starch stiffens styrenic polymer

Proprietary compounding technology for blending plant-based starch with other polymers has been applied in the production of Terraloy BP-18003A, a blend of thermoplastic starch (TPS) and high-impact polystyrene (HIPS), with up to 30% TPS content. The supplier, Teknor Apex Co. (Pawtucket, RI), also offers a masterbatch option, Terraloy MB-18003A, with TPS content ranging up to 50%. Both products are for use in typical HIPS applications such as cutlery, disposable razors, and other consumer products.


“The new Terraloy products are the first polystyrene/starch blends that make it possible to effectively substitute for 100% HIPS in many applications,” says Edwin Tam, manager of new strategic initiatives. “While starch acts like a filler in conventional blends with HIPS and is incorporated through techniques that cause a dramatic fall-off in physical properties, the proprietary technology employed for Terraloy products disperses TPS in the host polymer in a unique morphological form that minimizes property losses.”

Terraloy BP-18003A compound is ready to process and requires no change in the tooling used for 100% HIPS processing. The recommended letdown ratio for Terraloy MB-18003A masterbatch is 1:1. [email protected]

TAGS: Materials
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