1： Plastic packaging is not fresh, but also has a plastic smell:
The quality of wine preservation not only directly affects its taste. Especially for collectors, it also determines the appreciation potential of wine.
Because the plastic packaging is transparent or translucent, the ultraviolet ray in the light also causes great damage to the wine, and is also one of the main culprits to accelerate the oxidation process of wine. Therefore, the wine that wants to be preserved for a long time must use dark glass bottles or opaque porcelain.
When wine is bottled, its change is a slow process. Vibration will accelerate the maturation of wine, and of course, the result will also make the wine rough. So it should be placed away from vibration and not moved frequently.
For wine that has been opened but not finished, the ideal method is to pump out the air in the wine bottle first, and then plug the bottle, which can be kept for a long time. Plastic packaging does not meet the requirements of sealing.
4： Defects of plastic packaging itself:
Compared with glass bottles (or porcelain containers), plastic packaging has a larger permeability coefficient of oxygen and carbon monoxide, which will lead to chemical reaction between the wine and plastic packaging, and the wine will be oxidized and the taste of wine will deteriorate.
The aging of plastic packaging products also affects the appearance quality, is not beautiful and practical, and pollutes the environment.
It can be packed in plastic drums. Some low-grade Baijiu sold on the market, such as Erguotou, sorghum wine, etc., are packed in plastic barrels. According to experts, at present, food-grade plastic packaging materials are mainly divided into two categories: common PE? Polyethylene plastics, the other is environmentally friendly PET? Polyester plastic. The former is applicable to ordinary foods and beverages, while the latter is applicable to foods and beverages with strong solubility such as wine and edible oil. Ordinary polyethylene plastic barrels are used to hold Baijiu. For a long time, polyethylene can be dissolved in alcohol, which may cause skin allergy and even anemia after people drink it. PET is a new type of high molecular polyester material with more stable molecular structure. It can be used to fill Baijiu without harm to human body, but its sealing is not as good as glass bottles. After being stored for a long time, the alcohol will gradually volatilize.
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