... .Particle Size D50:3-5 micron Zinc Borate For PVC Wall Paper Molecular formula: 2ZnO·3B2O3·3.5H2OMolecular weight: 434.5SPECIFICATIONS ... . Moreover, it is widely used in textile, fiber, floor, leather, wall paper, carpet, paint etc decorative materials to improve flame retardant ... : internal plastic with knitted exterior covered with film, with the net weight of 25kg or 40kg.