2, has a melt strength from the die to have a certain flowing melt viscoelasticity, i.e. higher melt strength. Since the melt cast onto woven stretch the distance is a draw process film plastic bags, there is a certain draw ratio, it requires a certain degree of melt strength in order not to break or pull pulled off. Do plastic bags when the temperature of the production of raw materials ordinary plastic bags are generally polystyrene plastic bags recycled materials, is a carcinogen, when temperatures exceed 65 ℃, it will produce dioxins and other toxic substances. Plastic bags _ _ Beijing Xin Yu Mine plastic bags packaging plant by Xiong Yu Xin plastic packaging plant. Plastic bags packaging _ _ Beijing Xin Yu Mine plastic bags factory Xiong Yu Xin plastic packaging plant (www.xinyusl.com) (www.xinyusl.com) this year introduced a new upgrade, the above picture is for reference only, please call Tel or pictures on this page, for the latest information, contact: Wang Kai Lai.