Preparation and preservation methods of longan preservative film

Abstract

The invention discloses a preparation method of a longan preservative film. The method comprises the following steps that weighing is performed; a preservative film is formed; the preservative film isstretched; corona treatment is performed on the lower surface of the preservative film; anti-fog particles are sprayed on the lower surface of the preservative film after corona treatment, so that the anti-fog particles and the preservative film are embedded to form an anti-fog layer; hot pressing is performed; drying is performed; rolling is performed; inspection, packaging and transport are performed. According to the method, corona treatment can be performed on the surface of the preservative film, and the anti-fog particles are sprayed, so that the firm anti-fog layer is formed on the surface of the preservative film, and the anti-fog effect of the preservative film is improved. The invention further discloses a preservation method, the anti-fog layer of the preservative film faces downwards to wrap a bowl opening of a bowl, water molecules in the bowl are diffused to the surface of the anti-fog layer, a transparent water film is formed, and thus the anti-fog effect is achieved.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping film, in particular to a preparation and fresh-keeping method of a longan fresh-keeping film. Background technique [0002] Longan is native to southern China, and its economic use is mainly as a fruit, because its aril is rich in vitamins and phosphorus, which is beneficial to the spleen and brain. The moisture of fresh longan is more than 80%. When the existing plastic wrap is used to preserve the longan pulp, because the pulp of the longan pulp has more moisture, it will emit a large amount of water. After condensation, the water vapor will condense into water on the inner surface of the plastic wrap Beads greatly affect the light transmittance in the packaging bag, making it impossible for people to clearly observe the situation inside, and the dripping water droplets will also cause harm to the longan, and the shell of the longan is rough, and it is often easy to wear and keep fresh me...

AI Technical Summary

Problems solved by technology

The moisture of fresh longan is more than 80%. When the existing plastic wrap is used to preserve the longan pulp, because the pulp of the longan pulp has more moisture, it will emit a large amount of water. After condensation, the water vapor will condense into water on the inner surface of the plastic wrap Beads greatly affect the light transmittance in the packaging bag, making it impossible for people to clearly observe the situation inside, and the dripping water droplets will also cause harm to the longan, and the shell of the longan is rough, and it is often easy to wear and keep fresh membrane

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