Avient has expanded its Gravi-Tech density-modified polymers range to include more sustainable grades based on recycled and bio-based resin and/or filler. The new Gravi-Tech REC and the Gravi-Tech BIO formulations are tailored towards luxury cosmetic caps and closures. The first-generation Gravi-Tech formulations were developed to mimic the luxurious look, weight, and feel of die-cast or…