Rohm and Haas Co. is offering a new impact modifier specifically aimed at bioplastics.
Polylactic acid polymer's use in packaging has been constrained because it is weaker and more brittle than conventional plastics, according to Philadelphia-based Rohm and Haas.
The firm's Paraloid BPM-500 makes bioplastics stronger without sacrificing clarity, which has been a shortcoming of previous modifiers, the company claims.
Paraloid BPM-500 uses dispersible nanoparticles that do not scatter light, the firm said. The additive at 5 percent loading in PLA exhibits less than 10 percent haze. As well, it is food-contact compliant in Europe and the United States.