Grape fresh powder and preparation method thereof

Abstract

The invention relates to a grape fresh powder and a preparation method thereof, wherein the grape fresh powder comprises insecticides and heat-seal package papers, the insecticides are quantificationally heat-sealed in a medicine package which is made from package papers, and comprise pyrosulfite, controlled-release agents and filling agents, the heat-seal package papers are perforated through a laser perforating machine, holes are similar elliptical holes, the areas of the holes are 2-12*10-3mm2, and the density of the holes is 2-5/cm2. The grape fresh powder and the preparation method thereof are simple in process, high in production efficiency, steady and controlled in quality, and the slow release period of sulfur dioxide is 3-5 months.

Description

technical field [0001] The invention relates to a fruit and vegetable fresh-keeping agent, in particular to a grape fresh-keeping powder and a preparation method thereof. Background technique [0002] Grapes are grown widely all over the world. According to the statistics of the World Food and Agriculture Organization, in 2010, the world's grape cultivation area reached 7.198 million hectares, and the grape production was 68.312 million tons; my country's grape planting area is about 643,900 hectares, with a total output of 8.652 million tons. Grape is one of the four major fruits in my country, and more than 70% of it is used for fresh food. [0003] Grapes belong to berries, which contain a lot of sugar, organic acids, proteins, minerals and vitamins, etc., and have high nutritional and therapeutic value. However, the grape skins are juicy and have high water content. During transportation and storage, they are easily infected by gray mold, Penicillium, Alternaria, Clado...

AI Technical Summary

Problems solved by technology

[0007] First, the combination of ingredients in the preservative is unreasonable, and the release of sulfur dioxide is uneven, which can easily cause bleaching.

Such as patents CN1279021A, CN1234514A, CN1105081A, the grape fresh-keeping paper is generally made by mixing and stirring the preservative, water and adhesive to make a paste, and then brushing it on the base material and drying it. Water is decomposed into sulfur dioxide, which also directly affects the health of production workers

Among the fresh-keeping paper products currently available in the market, most of the sodium metabisulfite raw powder is directly used without adding other controlled-release ingredients, and no technical measures for slow-release are adopted. It is easy to cause sulfur dioxide to be released too quickly during application, resulting in fruit bleaching

[0008] The second is that the production process is complicated and the production efficiency is low; generally, the bottom substrate is made into a bag-shaped grid or a sunken cavity, and then the solid preservative is put into each bag-shaped grid or cavity, and then heat-sealed, cold-sealed It is made by bonding another layer or double-layer substrates by pressing or manually; as in patents CN1279020A, CN102894072A, CN2481520Y, and CN1760446A, the two layers of substrates are combined and hot-pressed to form mutually independent plane squares, Then quantitatively put preservatives in the grid for dry production, and then cut, punch, and pack into products; CN102972513A composite grape preservative paper needs to be fed twice in order and heat sealed twice, and the production process is cumbersome

Compared with other fresh-keeping papers, the number of layers is reduced, but the active ingredients are coated on the coating layer in the state of coating liquid, and it takes a certain time to dry, and the thickness of the coating layer is not easy to control, and the actual operation is difficult

[0009] The third is excessive use of paper, plastic and other substrates, causing greater pressure on the environment

Some packaging methods use paper bags to hold medicines, and then add a plastic film on the outside of the paper bags, open both ends and fix them with staples in the middle, but this production method is manual operation, low production efficiency, and uncontrollable quality

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