Woven bag, also known as snake skins. is a plastic bag, used for packaging, the raw materials are generally polyethylene, polypropylene and other chemical plastic materials. Weaving density refers to the number of weft yarns in 100mmx100mm woven fabric.
The national standard gb/t8946-1998 stipulates, "The bag will be flat, in the bag, the next two diagonally delineated 100mmx100mm two square, outside the box and the edge of the bag 100mm, visual box, the number of weft root, take the average, count when the last point when the end of a root, according to a single meter. "In the national standard, the density tolerance is specified while the weaving density is specified." The weaving density depends mainly on the packaging product, which is determined by the user.