Through the improvement and development of material technology, the production of woven bag manufacturers has been greatly improved in recent years, and the market has also been expanded and widely used in various fields. But in the process of use, we should pay attention to the safety of the use of woven bags, especially for food storage and transportation. The raw materials used to produce woven bags for food must meet food grade standards. High density polyethylene, low density polyethylene and linear low polyethylene are food grade raw materials. Our company is also very aware of this point, of course, there is no lack of a few manufacturers in the market in order to reduce the cost of non-food grade raw materials, or even containing heavy metals and other harmful substances waste plastic production ultra-thin color plastic bags. If they are used to store food, especially food containing oil and large water content, the oil and water in food will accelerate the decomposition of harmful substances and penetrate into the food, the consequences may lead to enteritis, gallstones and other diseases, affecting human health. Therefore, in daily use, we should use less or do not use colored woven bags to store food, to prevent unnecessary harm to our body.