https://www.avient.com/sites/default/files/2021-11/avient-design-ergonomic-design-guide.pdf
A design with an unfilled plastic handle—in which the polymer contains no fillers—pushes the COM toward the blade, making the knife feel unbalanced in a power grip.
Figure 18 shows how Versaflex™ CE 3320-70 TPE resists staining from rubbing against blue jean material containing dye.
New polymers containing recycled content are being developed to reduce carbon emissions, energy usage, waste and pollution.