Tyvek (r)are trademarks of the United States Dupont (tm), developed a packaging series wood products, locally known as ”tear is not bad”, called ”Tai wei ke” (China mainland translation special ”Te wei qiang”), spunbond olefin paper is a high-density polyethylene microfibre, specially treated to forming nonwoven, formed through a continuous process, 0.5 to 10 microns isotropic fiber fine in this process first jet spinning, then heatedpressure bonded together, and do not need to add binders and fillers. Type of sheet material with a balanced physical properties, combined with the characteristics of paper, cloth and film have, therefore its application is more flexible than traditional materials.