In the process of food storage, transportation and sales, plastic bags as commonly used packaging materials, its quality and characteristics are directly related to the safety and quality of food. A plastic bag suitable for food needs to meet many strict requirements.

First, safety compliance material

Food grade raw materials: Plastic bags suitable for food must use raw materials that meet food grade standards, such as polyethylene (PE), polypropylene (PP), etc. These materials are strictly tested and do not contain harmful substances, such as heavy metals, plasticizers, etc., to ensure that they will not migrate to food during contact with food, thus protecting the health and safety of consumers. For example, PE material has good chemical stability and hygiene, and is widely used in all kinds of food packaging.

Strict production process: The production process follows a strict quality management system to ensure that every link meets food safety standards. The production environment should be kept clean and hygienic to avoid secondary pollution in the production process. At the same time, the production equipment is regularly maintained and tested to ensure the stability of product quality.

Second, good physical properties

High strength and flexibility: food plastic bags should have enough strength to withstand the weight of food and extruding, pulling and other external forces during handling. At the same time, it also needs to have good flexibility, which is easy to package different shapes and textures of food. By optimizing the material formula and production process, the plastic bag has moderate flexibility under the premise of ensuring strength, to prevent cracking due to hardness, or to be too soft and unable to carry food.

Excellent barrier performance: Barrier performance is one of the key properties of food plastic bags. It needs to have good moisture resistance to prevent food from deteriorating and moldy due to moisture absorption; At the same time, it must have a certain oxygen resistance, slow down the oxidation rate of food, and extend the shelf life of food. For example, the use of multi-layer composite film structure can effectively improve the barrier performance of plastic bags and better protect the quality of food.

Third, reasonable functional design

Sealing performance: Good sealing performance is an important guarantee to keep food fresh. Food plastic bags are usually heat-sealed or self-adhesive sealing to ensure tight sealing, prevent air, moisture and odor from entering, and maintain the original flavor and quality of food. For some foods that need to be preserved, such as meat, seafood, etc., sealing performance is particularly important.

Easy to open and easy to carry: In order to facilitate the use of consumers, the design of food plastic bags should consider easy to open. The easy-to-tear design allows consumers to easily open the package without the help of tools. At the same time, reasonable design of the handle or easy to hold the structure, convenient for consumers to carry the purchased food.

Fourth, clear and accurate identification

Product information labeling: food plastic bags must be clearly marked with product name, material, specifications, manufacturer, production date, shelf life and other information, so that consumers understand the basic situation of the product, make a reasonable purchase and use decisions.

Safety warning labels: According to the characteristics of the food and relevant regulations, mark the necessary safety warning labels, such as "high temperature deformation, do not microwave", "avoid children's accidental eating", etc., to remind consumers to use and store food correctly to ensure the personal safety of consumers.

Plastic bags suitable for food have strict and clear requirements in terms of material, physical properties, functional design and identification. Only by meeting these requirements can we ensure the safety and quality of food in the packaging, storage and transportation process, and provide consumers with assured food packaging solutions.