Vacuum packaging is more insect-proof and mildew-proof than ordinary plastic packaging, and has a better preservation effect. But easy to leak. But no matter what, it should be easier to store than a paper bag. 1. Better preservation effect. 2. It is more wear-resistant than paper bags and not easy to break. At present, my country's rice sales packaging mainly uses plastic woven bags and composite plastic bags as packaging containers in terms of packaging materials. However, these packaging bags have many problems that need to be solved in transportation, loading and unloading, retail and other links. The use of plastic woven bags to package food is a serious waste. Generally, it can only be used once or twice, and the relative cost is relatively high. Moreover, the packaging method is simple and difficult to reseal after opening, which is not conducive to long-term storage and causes serious insect damage and mildew. The packaging materials have poor moisture resistance and barrier properties, and the grain is prone to oxidation and mildew. Plastic composite bags are made of high-barrier packaging materials. To a certain extent, they can solve the problems of mildew prevention, insect prevention, and preservation of food. However, post-processing is difficult. Because they are not easy to degrade, their use is also restricted. Domestic rice sales From the perspective of packaging technology, there are basically two types of packaging. One is ordinary packaging, which uses polypropylene plastic woven bags to package rice. No preservation technology is applied during the packaging process. This kind of packaging is very effective in preventing insects and preventing rice from being eaten. The effect of mold and preservation is poor; another method is to use vacuum packaging technology to evacuate the packaging bag. Vacuum packaging technology has a better preservation effect on the storage of rice, but due to the shape of the rice itself and the inappropriate selection of vacuum degree, currently The vacuum degree selected for rice vacuum packaging is generally between -0.07~-0.09kPa. As long as the vacuum degree is within this range, the product will be qualified when leaving the factory. Due to the high degree of vacuum, the packaging material tightly wraps the rice. Since the ends of the rice are sharp, the packaging bag is easily punctured by the rice grains, forming pinholes. In this way, the packaging bag will leak, causing the vacuum packaging to fail. Tests have shown that if a rice packaging bag with a vacuum degree of -0.094MPa is placed statically without stacking, the bag leakage rate will be 16% within 20 days. Therefore, high vacuum degree will inevitably lead to a high bag breakage rate. In addition, the friction, collision and falling between bags during the circulation process of packaging bags can easily cause bag breakage. According to statistics, the bag breakage rate of vacuum packaging during the circulation process reaches 30%. Due to the problem of vacuum packaging, rice is wasted, causing losses and trouble to both consumers and businesses. Therefore, when packaging rice to keep it fresh, it must be combined with the circulation environment, so as to achieve good results.