Transparent freshness-preserving film capable of prolonging freshness-preserving time of fruits and vegetables and preparation process of transparent freshness-preserving film

Abstract

The invention discloses a transparent freshness-preserving film capable of prolonging the freshness-preserving time of fruits and vegetables and a preparation process of the transparent freshness-preserving film. The transparent freshness-preserving film is characterized by being prepared from, by weight, 1000-1200 parts of polyethylene, 100-120 parts of kaolin, 4-30 parts of sodium alginate, 16-150 parts of chitosan, 300-600 parts of dioctyl phthalate, 2-8 parts of ultraviolet light absorbent, 20-50 parts of polysulfonyldiphenylene phenyl phosphonate, 2-30 parts of antibacterial agents, 100-200 parts of beeswax and 10-30 parts of silicon dioxide, wherein the dioctyl phthalate serves as plasticizer. The transparent freshness-preserving film and the preparation method thereof have the advantages that the technology is good in holemaking effect, simple in process and low in product cost. By adding an appropriate number of inorganic particles, the film weight is increased, the transparency of the film is improved, meanwhile, the strength and softness of the film are further improved, the film can have a better freshness-preserving effect, the selling cycle is prolonged, the loss and consumption are lowered, and thereby the operation cost of a supermarket is lowered.

Description

Technical field [0001] The invention belongs to the technical field of plastic packaging, and specifically relates to a transparent preservative film capable of prolonging the preservation time of fruits and vegetables and a preparation process thereof. Background technique [0002] Polyethylene and polyvinyl chloride cling film are widely used in daily life. For the temporary preservation of vegetables, fruits and household food, as well as to prevent the smell of food during storage, the cling film must be used. At present, fruit and vegetable sales areas in supermarkets often use plastic wrap to simply package fruit and vegetable foods to make them more selling points. However, fruit and vegetable products must not only prevent insect bites or other external damage, but also ensure that the harmful gases generated during storage must be discharged in time to ensure fresh. However, the plastic wrap currently used is difficult to achieve this, so there is a possibility of accel...

AI Technical Summary

Problems solved by technology

However, the currently used plastic wrap is difficult to do this, so there is a possibility of accelerated spoilage for fruit and vegetable products that cannot be sold in time

On the other hand, there is a certain color difference between wrapped fruits and vegetables and unwrapped fruits and vegetables because they are covered with plastic wrap, which makes customers think they are not fresh. It can be seen that transparency is also one of the important indicators of this type of plastic wrap