Huntsman Polyurethanes has released a new 3-D printing platform, Iroprint, featuring three new additives tailored for modern footwear production. The new range of additives—for polyurethane resin, powder and filament production methods—will initially be used to make both customizable, small-batch footwear, along with mass-manufactured shoes lines, and Huntsman said they’ll be released for use in more…