Antiseptic bud-controlling preservative film for potatoes of purple sweet potatoes, sweet potatoes and yam beans

Abstract

The invention relates to a mould-proof high-permeable preservative film special for purple sweet potatoes. The preservative film is prepared from linear low-density polyethylene resin, low-density polyethylene resin, calcium carbonate master batch, antifog master batch, antibacterial master batch, silane coupling agent, oleamide, ethylene absorbent, CO2 absorbent, sprout inhibitor, thickening agent, antioxidant, thymol essence oil and methyl jasmonate. The prepared preservative film disclosed by the invention is bright in surface; strength, ageing resistance and stretchability of the film are enhanced; the preservative film has performance of breathability, moisture penetrability, sprout inhibition, mould prevention and fog prevention; the risk caused by high CO2 concentration in a purple sweet potato storage process is reduced; compared with other preservative films, the preservative film has more pertinence on refreshment of the purple sweet potatoes.

Description

technical field [0001] The invention belongs to the field of anti-mildew and fresh-keeping, in particular to an anti-corrosion and sprout-suppressing fresh-keeping film for purple potatoes, sweet potatoes and jicama. Background technique [0002] The main factors affecting the length of the fresh-keeping period of potatoes, especially purple potatoes, sweet potatoes and jicama are as follows: [0003] (1) Storage humidity: The storage environment of potatoes requires high humidity, generally above 90%. Anti-fog, avoid the formation of water droplets, avoid the growth of mold, and at the same time add preservatives to avoid the growth of mold. [0004] (2) Temperature: Due to the high storage temperature of potatoes, strong fruit respiration, high storage temperature (above 14°C), fast metabolism, and fast gas production, a material with good air permeability, especially fast adsorption of ethylene is needed. [0005] (3) Gas: Potatoes can release carbon dioxide and absorb ...

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Problems solved by technology

[0005] (3) Gas: Potatoes can release carbon dioxide and absorb oxygen during storage, and self-regulate the gas in the storage space. However, if the external atmosphere is not adjusted properly, it will easily cause gas disturbance, which will affect the storage period of potatoes.

[0009] (7) Bran heart: wounds such as cracks and cracks are caused during harvesting, storage and transportation, which enhance respiration, and excessive nutrient consumption causes bran heart, which affects the subsequent eating taste and storage time

However, during transportation and storage, the temperature is often lower than the optimum storage temperature, causing chilling damage to potatoes; high temperature and high humidity cause high respiratory intensity, serious problems of rot, germination, and browning, resulting in serious loss of nutrients

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