PE heavy film bag, also known as FFS bag (Film-Fill-Seal Bag), is an automatic forming and filling bag. It is the latest high-speed packaging technology developed in Europe. It has the characteristics of high packaging efficiency and low cost. It is a high-tech product in the packaging industry. Compared with traditional plastic woven bags, PE heavy film bags have a unique raw material ratio, superior performance, environmental protection, easy recycling, and comply with the international requirements for the fourth category of environmentally friendly packaging materials. This kind of bag is usually used to pack items of 20kg or more, the most common such as 25kg of resin raw materials. PE heavy film bags are widely used in the field of packaging. They are not only used for packaging industrial and agricultural products, such as plastic raw materials, fertilizers, feed, etc., but also become a good helper in logistics and transportation because of their environmental protection properties.