Food packaging bags, is a kind of packaging design, life in order to facilitate the preservation, storage of food, resulting in product packaging bags. Food packaging bags are film containers that are in direct contact with food and are used to contain and protect food. In life, food packaging has the largest number and the widest content. Most foods are delivered to consumers after packaging. The more developed countries, the higher the packaging rate of goods.

Today, with the internationalization of commodity economy, food packaging and commodities have been integrated. As a means of realizing commodity value and use value, it is increasingly playing an important role in the fields of production, circulation, sales and consumption. Food packaging bags should be produced using food-grade plastic film, usually two or more layers of composite bags.

Because of the diversity of food, the food packaging bag type is rich and varied, and the specifications are uncertain. According to different classification standards, the classification of food packaging bags is also different.

First, according to the different raw materials for the production of packaging bags, it can be divided into: low-pressure polyethylene plastic bags, polyvinyl chloride plastic bags, high-pressure polyethylene plastic bags, polypropylene plastic bags, etc.

Second, according to the different shape of the packaging bag, it can be divided into: upright bag, sealed bag, vest bag, square bottom bag, plastic strip bag, sling bag, special-shaped bag and so on.

The third is classified according to the form of packaging, which can be divided into: medium sealing bag, three-sided sealing bag, four-sided sealing bag, yin-yang bag, self-standing bag, zipper bag, suction nozzle bag, film roll and so on.

Four is classified according to the function of the packaging bag, can be divided into: high temperature cooking bag, high barrier bag, vacuum packaging bag and so on.

Five is based on the production process classification is often divided into: plastic bags and composite bags.

In our lives, food such as rice usually uses vacuum packaging such food packaging bag type. The use of vacuum packaging can reduce the oxygen concentration in the storage environment, inhibit the respiratory intensity of rice and the reproduction of mold, prevent rice aging, mildew, insects, etc., and better maintain the quality of rice. Due to the large vacuum degree, the packaging material tightly wraps the rice, and the rice ends are sharp, the packaging bag is easily broken by the rice grains, resulting in the failure of the vacuum packaging. The friction, collision and drop between the bag and the bag during the circulation of the packaging bag are also easy to cause the bag to break. Therefore, in the preservation of rice packaging at the same time to combine with the circulation environment, so as to achieve good results.