In the process of vegetable circulation, the choice of packaging bag plays a crucial role in the maintenance of vegetable quality, the control of loss and the promotion of sales. Reasonable selection of vegetable packaging bags needs to be considered from many aspects. ​

First, choose according to the characteristics of vegetables

Leafy vegetables: leafy vegetables have high water content, vigorous respiration, and easy to lose water and wilting. Therefore, bags with good air permeability and certain moisture should be selected. For example, microporous plastic film bags can not only ensure the exchange of oxygen and carbon dioxide, but also maintain a certain humidity in the bag, delaying the aging of leafy vegetables. In addition, non-woven bags are also more suitable, and their air permeability is good, which can reduce the rot caused by humidity accumulation. ​

Root vegetables: Root vegetables are relatively resistant to storage, but some root vegetables release ethylene gas during storage, accelerating the ripening and decay of their own and surrounding vegetables. For such vegetables, packaging bags containing ethylene absorbent can be selected to effectively reduce the ethylene concentration in the bag and extend the fresh life of vegetables. At the same time, because the surface of root vegetables is relatively rough, the packaging bag needs to have a certain wear resistance to prevent being scratched. ​

Second, meet storage and transportation requirements

Short-distance transportation and short-term storage: For short-distance transportation and short-term storage of vegetables, you can choose low-cost, lightweight packaging bags, such as ordinary plastic film bags. This kind of packaging bag can play a basic dust-proof, anti-collision role, to protect vegetables from damage during transportation. ​

Long-distance transportation and long-term storage: If vegetables need long-distance transportation or long-term storage, the requirements for packaging bags are more stringent. It is necessary to choose packaging materials with good heat insulation and buffer performance, such as the packaging method combined with foam mesh and carton, which can reduce the vibration and collision of vegetables during transportation, and adjust the temperature to a certain extent to maintain the freshness of vegetables. ​

Third, pay attention to the functional characteristics of the packaging bag

Fresh-keeping function: high-quality vegetable packaging bag should have good fresh-keeping function, can adjust the gas composition in the bag, inhibit the respiration of vegetables, delay their metabolism. Some bags use air-conditioned packaging technology, by filling the right amount of nitrogen, carbon dioxide and other gases, to create a suitable gas environment, extend the freshness of vegetables. ​

Easy identification and information transmission: the packaging bag should be clearly marked with the variety of vegetables, origin, production date, shelf life and other information, convenient for consumers to identify and choose. In addition, some bags with transparent Windows can allow consumers to intuitively see the appearance of vegetables and increase confidence in buying. ​

Fourth, consider the material and environmental protection

Material selection: The material of the vegetable packaging bag should meet the food safety standards, non-toxic, tasteless, and will not pollute the vegetables. Common materials are polyethylene (PE), polypropylene (PP), etc. These materials have good flexibility and chemical stability, suitable for vegetable packaging. ​

Environmental requirements: With the improvement of environmental awareness, degradable materials are more and more widely used in vegetable packaging. Degradable plastic bags, paper packaging bags and other environmentally friendly packaging materials, can be decomposed in the natural environment, reduce environmental pollution, in line with the requirements of sustainable development. ​

Balance costs and benefits

When choosing vegetable packaging bags, it is necessary to consider the cost and benefit comprehensively. It is necessary to ensure the quality and function of the packaging bag, but also to control the cost and improve economic benefits. By comparing the price of different materials and specifications of packaging bags, choose cost-effective products to achieve the balance of cost and benefit. ​

The selection of vegetable packaging bags needs to comprehensively weigh the characteristics of vegetables, storage and transportation requirements, the function of the packaging bag, the environmental protection of the material and the cost effectiveness and other factors to ensure the quality and value of vegetables in the circulation process. ​