New type of fruit and vegetable preservation bags

Fruits and vegetables play a crucial role in people's daily lives and are one of the indispensable food categories. They are rich in various carbohydrates, a wide range of organic acids, various vitamins and multiple inorganic salts. Because of this, fruits and vegetables have become an essential source of nutrition for humans. However, the production of fruits and vegetables has significant seasonal and regional characteristics. Coupled with the perishable nature of fruits themselves, this creates a sharp contradiction with consumers' diverse demands for fruits and the urgent need for regulation during off-seasons. Therefore, the issue of fruit and vegetable storage and preservation has become increasingly prominent. Thus, exploring safe and effective technologies for post-harvest storage and preservation of fruits is of great and far-reaching significance.

Traditional household preservation bags are mainly made of low-density polyethylene. This material is widely used due to its food safety guarantee, simple manufacturing process, relatively low cost, transparent appearance, and good toughness in low-temperature environments. However, due to the significant water-blocking effect of polyethylene material itself, it easily causes the water evaporated by fruits and vegetables during the ripening process to accumulate inside the bag, thereby accelerating the spoilage and rotting of fruits and vegetables. At the same time, polyethylene has poor oxygen-blocking performance, allowing oxygen to easily enter the interior of fruits and vegetables, accelerating various physiological metabolic activities, consuming a large amount of energy from fruits and vegetables and releasing heat, further accelerating the process of fruits and vegetables going bad and spoiling. 

Our team, after years of persistent practical application experiments, has finally obtained a unique material. This material can not only absorb the water evaporated by fruits and vegetables during the ripening process and permeate ethylene, but also effectively prevent oxygen from entering the preservation bag from the outside. By using multi-layer co-polymer blown film technology, a new type of fruit and vegetable preservation bag has been successfully manufactured. This preservation bag not only retains the advantages of polyethylene preservation bags, such as good toughness in low-temperature environments and a transparent appearance, but also effectively overcomes the defect of polyethylene easily accumulating water and causing fruits and vegetables to rot. Under the same storage conditions, this new material can extend the preservation period of fruits and vegetables by at least 7 days compared to traditional polyethylene. Due to the use of a single material, it is environmentally friendly, and given the excellent mechanical properties of the material, it can be reused in households, effectively avoiding unnecessary waste.