Food bag with cooling function

Abstract

The invention discloses a food bag with a cooling function. The food bag sequentially comprises back lining layers, hydrogel layers, ventilation layers and isolation layers from outside to inside. Film blowing is carried out on polyethylene to form the back lining layers, the hydrogel layers comprise polymeric hydrogel, paper and plastic composite materials are perforated to obtain the ventilationlayers, the isolation layers comprise PET (polyethylene terephthalate) thin films, the thicknesses of the back lining layers are 0.3-0.5 mm, the thicknesses of the hydrogel layers are 2-4 mm, the thicknesses of the ventilation layers are 0.8-1.2 mm, and the thicknesses of the isolation layers are 0.3-0.5 mm. The food bag with the cooling function has the advantages that the polymeric hydrogel layers are main structures of the food bag, heat can be concentrated in gelatinous substances by the aid of physical principles, moisture in the hydrogel can be quickly evaporated to carry away heat in ambient environments, and accordingly the cooling purpose can be achieved; the back lining layers and the isolation layers can guarantee the hydrogel layers against being in contact with the external and realizing effects when the food bag is not used, only the isolation layers need to be directly torn down when the food bag is about to be used, the internal ventilation layers can be exposed, the moisture of the hydrogel layers can be evaporated via holes in the ventilation layers, cooling can be carried out, accordingly, frozen food in the food bag can be prevented from being quickly thawed ormolten, and the food bag can bring convenience for people in life.

Description

technical field [0001] The invention relates to the field of plastic film processing, in particular to a food bag with a cooling function. Background technique [0002] With the development of the commodity economy, plastic bags for containing food are used more and more widely. However, although the production process of plastic bags is continuously improved, there are still many shortcomings and inconveniences. For example, frozen foods are sold using plastic bags. It is very easy to thaw or thaw in the process of taking the bag home, so that the food will deteriorate, which is very inconvenient. Therefore, it is very necessary to develop a food bag with a cooling function to solve this problem. The invention introduces a food bag with cooling function. The polymer hydrogel layer is its main structure, which can concentrate heat to the jelly by using physical principles, and take away the moisture in the surrounding environment through the rapid evaporation of water in the...