What are the differences between ordinary packaging bags and food packaging bags?
Release Date:
2023-12-26 11:34
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Many people may not realize the differences between food packaging bags and other types of packaging bags; in fact, there are numerous distinctions between the two. First, in terms of raw materials, food packaging bags must be made from food-grade plastic film, which is typically a multi-layer composite film—commonly referred to as rigid plastic—that can be either transparent or printed. Second, in terms of labeling requirements, food packaging bags are mandated to display specific information, including the name of the food product, its ingredients, nutritional values, applicable standards, shelf life, storage instructions, consumption guidelines, and details about the manufacturer. So, do you know what the key differences are between ordinary packaging bags and food packaging bags? If not, don’t worry—below we’ll provide a detailed comparison of the two, so let’s take a look.
Food packaging safety is a global issue, and in China the relevant safety standard is QS, which stands for “quality and safety.” The migration of substances from packaging materials is a critical factor affecting food safety and hygiene; as early as 1980, the renowned international food-packaging expert CONORRELIY discussed this issue in his book “METAL CONTAMINATION OF FOOD,” and it has also been incorporated into HACCP-based food-safety systems in recent years.
I. Paper Packaging. Paper is the oldest and most traditional packaging material; however, its potential safety hazards cannot be overlooked. The primary reason lies in the fact that chemical additives—such as sizing agents, fillers, bleaching agents, and colorants—are incorporated into the pulp during papermaking. Sizing agents typically include rosin soap; fillers comprise kaolin, calcium carbonate, titanium dioxide, zinc sulfide, barium sulfate, and magnesium silicate; bleaching agents include calcium hypochlorite, liquid chlorine, hypochlorous acid, sodium peroxide, and hydrogen peroxide; and colorants consist of water-soluble dyes and pigments, with the former including acid dyes, basic dyes, and direct dyes, and the latter comprising both inorganic and organic pigments.
II. Plastic Packaging: Plastics are the most widely used materials for food packaging. Plastics are generally classified into two main categories: thermosetting and thermoplastic. The former includes urea-formaldehyde resin (UF), phenolic resin (PF), and melamine-formaldehyde resin (MF); the latter comprises polyvinyl chloride (PVC), polyvinylidene chloride (PVDC), polyethylene (PE), polypropylene (PP), polystyrene (PS), nylon (NY), acrylonitrile-styrene copolymer (AS), acrylonitrile-butadiene-styrene copolymer (ABS), and polyester resins such as PET and PEN. Depending on the specific resin, different additives are employed, and adhesives such as TDI and TDA are used in the production of composite materials.
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