Safety and detection methods of plastic packaging bags

Some food packaging is very strong and has anti-counterfeiting labels, which are used to protect the interests of merchants from losses. The packaging bag can have labels such as laser logo, special color, SMS authentication and so on. In addition, in order to prevent theft, retailers put electronic monitoring labels on food packaging bags, and wait for consumers to take them to the outlet of the store to demagnetize. A single package helps to have precise control over the overall situation. For example, the amount of salt in the package can be known. It also makes it easier to calculate sales, such as when dairy companies deliver and recycle milk bottles instead of letting consumers fill them themselves. The quality of food packaging bags in the flexible packaging industry, especially the hygienic quality, is directly related to the safety of the packaged food. Therefore, it is necessary to ensure that the raw materials and additives used meet the quality requirements of the management system. It is necessary to improve the industry and national standards for packaging film bags and strictly implement them, strengthen the inspection and supervision of food packaging, prevent unqualified food packaging from entering the market, and strengthen management to ensure the healthy development of the flexible packaging industry. The inspection items of food packaging single film bags are mainly divided into the following categories: the appearance must not have defects such as air bubbles, perforations, water marks, violent tendons, poor plasticization, and fish-eye stiffness that are hindering use. Specifications, width, length, thickness deviation should be within the specified range. Physical and mechanical properties include tensile strength and elongation at break, which reflect the ability of the product to stretch during use. If this item is unqualified, the food packaging bag is prone to rupture and damage during use. Once upon a time, the quietly emerging plastic packaging bags replaced the ones in people's hands.“food basket”,“cloth bag”. But we see that while it brings convenience to people, there are also many hidden dangers. In recent years, the safety of food packaging materials has become increasingly prominent. Through observation, we can see that early stall owners use white plastic bags without any signs to pack fried dough sticks, porridge, steamed buns and other foods, as well as food such as stir-fries and cooked food for takeaways from restaurants, hotels, supermarkets, etc.; The packaging bags used by fruit stall owners are almost all colored plastic bags; while the plastic bags used by aquaculture owners are almost all black, and the strange smell of plastic bags can be smelled from a distance. Experts point out that food, especially cooked food, is often easily spoiled after being packaged in inferior plastic bags. After eating such spoiled food, it is easy to cause food poisoning symptoms such as vomiting and diarrhea. In addition, the plastic itself will release harmful gas, and the gas concentration increases with the increase of sealing time and temperature, resulting in different degrees of contamination of the food in the bag. The residues of vinyl chloride monomers in PVC, which may cause cancer, exceed national standards, or use processing aids that are prohibited in food packaging materials. It can be seen that the blind use of plastic bags to package food is harmful to health. In 1990, my country promulgated the 'Measures for the Hygiene Management of Plastic Products and Raw Materials for Food', which stipulates that recycled plastics shall not be used in the processing of plastic tableware, containers and food packaging materials; plastic products for food must be printed on obvious places.“for food”typeface. However, some of the plastic bags currently on the market belong to“Sanwu”Products, many of which are made of recycled plastics. Such plastic bags are harmful to human health when they come into direct contact with food, but they are still on the market because of their low prices.“popular”. It is understood that the 'General Rules for Prepackaged Food Labeling GB7718' is one of the national standards for food packaging labeling that the country has recently enforced.—2004' implements a mandatory product certification management system for food packaging products including lunch boxes, plastic bags, beverage packaging, etc., namely 3C certification, all food packaging materials must pass the certification before they can be put on the market to ensure the safety of food consumption. . Here, the quality supervision department reminds consumers: When choosing food packaging bags, you should see whether there is any food on the outer packaging.“for food”Chinese logo and 3C certification mark, etc., otherwise it cannot be used for packaged food. Consumers should master the following three simple methods for identifying food plastic packaging bags: First, the color of food plastic packaging bags should be white, and the colored ones cannot be used to package directly imported food, and special attention should be paid to those with peculiar smell; The second is that the food plastic bag has good texture, smooth hand feel, and the sound of shaking your hand is loud, and it can float on the water surface when placed in water. Spicy taste, which can continue to burn after leaving the fire.
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