This contraction film has a very strong Winding strength and shrinking characteristic. It can make the product compact and fixed shrink packing into one unit, makes small scattered boxes or items into one packing unit. Even if in an adverse environment each packed products will not separate or become loose, it can pack the products tightly in one package, it can effectively prevent the product from dislocation and moving during transport process, suitable for promotions of large packaging in various shops, outside film can print logo or product name, or trademark, manufacturers contact details and information,, not only environmental and affordable, it can also greatly upgrade the product’s effectiveness, nontoxic, order less, suitable for long delivery, it became popular and internationally known as packing material for many products.