Parchment paper is also known as industrial parchment paper. This kind of semitransparent packaging paper is widely used in mechanical parts, instruments, chemical and other industrial products, food, pharmaceuticals, inner packing for disinfection material, bobbin outer layer paper, agriculture, forestry and breeding in textile and chemical fiber industry. The characteristic of parchment is antistatic, air proof, grease-proof and water-proof and has high humidity, good elasticity ,high intensity and folding endurance. It can be used as semipermeable membrane.