Wuhan handern Plastic Film Application in Fruit Preservation
DATE：2020/5/20 8:34:16 / READ： / SOURCE：This station
Wuhan handern Plastic Film Application in Fruit Preservation
1) Research on fruits and fruits and vegetables. There are about 40 kinds of fruits and vegetables that have been studied. The fruits are: apples, bananas, oranges, lemon oak, grapefruit, sour food, persimmons, mountain plants, pears, peaches, Things, plums, grapes, pineapples, cherries, nectarines, pears, fragrant papayas, cantaloupes, watermelons, melons, strawberries, apricots, lychees, longan (longan), mangoes, kiwis, per sons, cranberries and tea fruits, etc. There are about 30 kinds of berries. The fruits and vegetables that have been studied are: tomatoes, green peppers, cucumbers, eggplant bitter melon, sweet corn, kidney beans, lima beans and okra. The results of the research on the above fruits affirmed the preservation effect of plastic film packaging. It is much better to use film packaging to increase the temperature than cold. Among them, apples, bananas, citrus fruits, persimmon pears, strawberries, green roots and tomatoes have been used for commercial storage and preservation in China. www.hanedrn.com Breathable membrane equipment
2) Research on leafy vegetables and cauliflower. The water content of leafy vegetables is very high. The main reason for post-harvest loss of freshness is the shrinkage caused by evaporation and water loss. In addition to the fruit film research, leaf vegetables and cauliflowers are the main ones. The types of research are: headed lettuce, vegetable, celery, headed cabbage, leek, leek, scallion, green onion, parsley, headed cabbage, kale, bun Ganlan, Wuqing Ganlan, rhubarb There are nearly 20 kinds of wildflowers, cauliflower, green cauliflower (stalk cauliflower), etc., and the film packaging has a very obvious fresh-keeping effect on these leaves and cauliflower, especially for green leaf vegetables. www.hanedrn.com Breathable membrane equipment
China ’s Beijing, Shenyang, Shanghai, and Taiyuan have used small-film packaging or large-scale tents to store cauliflower, cauliflower, yaohe celery, etc., and have received significant economic and social benefits. After harvest, green cauliflower is very easy to lose freshness. It can only be stored for half a month at low temperature, but it can be successfully kept fresh for 30-45 days by using plastic film single flower ball sealed packaging and combining with low temperature. 3) Research on rhizomes, there is still little research on the packaging of alcohol in rhizome vegetables. The rhizome vegetables that have been studied are: potato, Lingbai, Luotu, Hutu, Gaosuan, Ruolan, brand root, stone There are nearly ten kinds of Diaobai and European windproof; thin packaging can effectively prevent the tubers from losing water and shrinking, which can accelerate the healing of mechanical injuries during the harvest of tubers such as horse potatoes, but film packaging is not suitable for low temperature storage. Roots such as garlic. www.hanedrn.com Breathable membrane equipment
(2) Selection of film thickness The permeability of the film is inversely proportional to the thickness of the film, and the thickness of the film is directly proportional to the cost. So far, the thickness of the Yishi clothing that has been studied at home and abroad for fresh storage of fruits is 0.01-0.25mm. The thickness of the film suitable for packaging varies according to the type of product and the packaging method. At present, it is generally considered that single fruit packaging can be thinner. For example, for the packaging of dried fruit, the thickness of 0.01 ～ 0.02mm can be used, and the small package of 1-2kg per surface is generally 0.03-0.06m thick, and the thickness of 0.04 ～ 0.06mm is mostly used in China. The packaging volume is large, and it is easy to be damaged during storage and transportation, so the thickness of 0.1 to 0.2 mm should be used. www.hanedrn.com Breathable membrane equipment
Using films of different thicknesses sometimes results in the opposite. Bananas are packed with polyethylene films of different thicknesses. The time required for CO2 and O2 in the bag to reach equilibrium at 30 ° C is proportional to the film thickness. The balance value is linearly related to the film thickness, within the range of 0.02-0.08mm thickness. The length of the fresh-keeping time increases with the thickness, but when the film thickness exceeds 0.08mm, the fresh-keeping effect drops sharply. The thickness of polyethylene film suitable for different types of fruits and vegetables is different, such as citrus is 0.01 ~ 0.02mm, hawthorn is 0.04 ~ 0.08mm. www.hanedrn.com Breathable membrane equipment
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