... Particle Size D50:3-5 micron Zinc Borate For PVC Wall Paper Molecular formula: 2ZnO·3B2O3·3.5H2OMolecular weight: 434.5SPECIFICATIONS ... current Antimony Oxide or halogen flame retardants, Zinc borate is directly used in PVC, PE, Polyolefin, Epoxy Polyamide etc ... it is widely used in textile, fiber, floor, leather, wall paper, carpet, paint etc decorative materials to improve flame retardant performance ...