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The difference between rice in vacuum bags and ordinary sacks

In the past, rice was mainly packed in ordinary sacks and cloth bags. Later, with the development of vacuum plastic (structure: synthetic resin, plasticizer, stabilizer, and pigment) packaging bags, rice was gradually packed in vacuum plastic bags. What is the difference between the two? Packing rice in sacks and cloth bags can be reused, but due to its high air permeability, moisture resistance (to prevent the items from becoming moldy and deteriorating), and poor light isolation, it is prone to mildew and insect damage. Food plastic bags commonly used in plastic bags are mostly made of polyethylene film, which is non-toxic and can be used to contain food. There is also a film made of polyvinyl chloride, which itself is non-toxic, but the additives added according to the use of the film are often harmful to the human body and have certain toxicity. Therefore, such films and plastic bags made of the films are not suitable for containing food. To identify polyvinyl chloride plastic bags and polyethylene plastic bags, the following simple method can be used for identification. The vacuum bag is filled with nitrogen, carbon dioxide and other gases after the vacuum is drawn. Nitrogen is an inert gas, which acts as a filling and keeps the vacuum bag at a positive pressure to prevent the air outside the bag from entering the bag, and has a protective effect on the food. Carbon dioxide has the activity of inhibiting microorganisms such as mold and spoilage bacteria. Some foods such as crispy and fragile food, easily deformed and oily food, food with sharp edges and corners or high hardness will puncture the vacuum bag, etc. After vacuum inflatable packaging, the inflation pressure in the vacuum bag is stronger than the atmospheric pressure outside the packaging bag, which can effectively Prevent the food from being crushed and deformed under pressure, and does not affect the appearance and printing decoration of the packaging bag. With the promotion of vacuum bag small packaging and the development of supermarkets, its scope of application will become more and more extensive, and some will gradually replace hard packaging. The rice vacuum packaging bags made of high barrier materials EVO H, PVD C, PE (polyethylene) T, PA and PE, PP, etc. , In addition, the printing patterns and trademarks on the rice packaging bags will be obvious, and the text and barcodes will be clearly visible, which will make it easier to attract customers and promote sales. The aluminum foil bag is also called decompression packaging, which is based on the principle of atmospheric pressure. The main function of the vacuum bag is to deoxygenate, so as to prevent the food from being moldy and deteriorating. Vacuum packaging is a process in which the oxygen in the packaging bag and in the food cells is extracted by an air extractor, so that the microorganisms lose their “living environment”. The vacuum bag can also prevent the oxidation of food, so that the food does not taste, and reduces the loss of vitamins A and C. Plastic bags are an indispensable item in people’s daily life and are often used to hold other items. It is widely used because of its advantages of low cost, extremely light weight, large capacity, and easy storage. However, due to the shortcomings of extremely long degradation cycle and difficult disposal of plastic bags, it has been banned by some countries for production and use. Increasing the quality of materials such as PE (polyethylene) T can increase the strength of the rice vacuum plastic (structure: synthetic resin, plasticizer, stabilizer, pigment) packaging bag, and improve its compression and rupture resistance. food bags, food packaging bags

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