Food grade plastic bags are generally divided into ordinary food packaging bags, vacuum food packaging bags, inflatable food packaging bags, boiled food packaging bags, steamed food packaging bags, and functional food packaging bags. The materials are also diverse, and common food grade plastic bag materials include PE (polyethylene), aluminum foil, nylon, and composite materials. In order to ensure the freshness and absence of disease and decay of food, food grade plastic bags have some common characteristics in both categories and materials. Firstly, they require complete isolation of organic solvents, oils, gases, and water vapor; Secondly, it has excellent permeability, moisture resistance, cold resistance, heat resistance, light avoidance, and insulation properties, and also has a beautiful appearance; Thirdly, it is easy to form and has low processing costs; Fourthly, it has good strength. Plastic packaging bags have high strength performance per unit weight, are resistant to impact, and are easy to modify.
In addition to the above characteristics, for consumers of edible products, food grade plastic bags also have some characteristics that come with hard requirements. Firstly, the main materials and auxiliary materials used generally do not contain harmful chemicals to the human body, or according to the special needs in the actual production process, the chemical content is within the standard range allowed by the country, and the chemical stability is strong; Food grade plastic bags sometimes also have corresponding anti-corrosion, rust prevention, and electromagnetic radiation protection functions to ensure food safety and hygiene from various perspectives.
Due to the close relationship between food grade packaging and people's lives, major manufacturers must strictly comply with production regulations and standards, and follow the production process of food grade plastic bags in order for products to ultimately pass the audit and be put into the market. So for consumers, how to distinguish food grade plastic bags? You can start from the following aspects: first observe the appearance when receiving the packaging bag, the food grade plastic bag material has no odor, uniform texture, bright color, high glossiness and transparency; Then it can be touched by hand. Food grade plastic bags have a good hand feel, are not sticky, smooth, and have no obvious particle sensation; Only when these requirements are met, can food grade plastic bags be safe and hygienic.
