Recently, a new five-layer co-extruded film packaging bag developed and produced by Jiangsu Kunshan Huayi Plastics Co., Ltd. has been put on the market. The packaging bag was tested by China Packaging Scientific Research and Testing Center and the gas barrier index was 0.1 order of magnitude. The product has excellent gas permeation resistance, can resist the corrosion of chemical substances, suitable for chemical, pharmaceutical, pesticide, spices, food additives and other product packaging, and can greatly extend the shelf life of products.

At present, most of the obstruction bag manufacturers in China are outdated in terms of technology and equipment, and most of them are mainly coextruded or coated nylon products, which have not kept pace with the development of high barrier packaging demand. With the rapid development of high-tech in our country, the export of chemical products is increasing day by day, and the demand for high-barrier packaging is increasing. The company developed a high-barrier, five-layer co-extruded film package using ethylene-vinyl alcohol copolymer (EVOH), which has excellent barrier properties, anti-oxygen permeation string is an order of magnitude higher than polyvinylidene chloride, higher than biaxially stretched nylon More than 100 times, 50,000 times more than commonly used low density polyethylene; Anti-carbon dioxide penetration 250 times higher than biaxially stretched nylon, 50,000 times higher than low density polyethylene; Resistance to nitrogen penetration higher than biaxially stretched nylon 700 Times, 180,000 times higher than low density polyethylene.