What important information is revealed on the food packaging film (bag)? It's about your health.

With the continuous development of packaging technology, high-resistance plastic packaging materials that can guarantee quality, keep fresh, preserve flavor and extend shelf life in the food packaging industry, especially composite film (bag) are widely used in milk powder, tea, cooking Food, meat, flavor snacks, beverages, milk and other packaging. In addition to the processing technology and sterilization methods of food itself, how to choose appropriate packaging materials has a very important impact on ensuring food quality and safety.

At present, the widely used plastic packaging materials in the market are: 1. Polyethylene (PE) polyethylene has low transparency, has certain gas permeability, tensile strength and tear strength, and also has certain flexibility and good moisture resistance. It has good chemical stability and is a non-toxic packaging material. Therefore, it is often used in heat seal layers and moisture barrier coatings of composite materials. 2. Polypropylene (PP) Polypropylene is a polymer made of propylene. It is a very light plastic with good transparency and gloss. It has good physical and mechanical properties such as tensile strength, hardness and toughness, and good heat resistance. It can be used continuously at a high temperature of 120 ° C and can be cooked in boiling water. It has stable chemical properties and is stable to acids, bases, salts and many solvents in a certain temperature range. Health and safety, in line with food packaging requirements. 3. Polyester (PET) is commonly known as polyester. High transparency and good gloss. It has excellent gas barrier, oil resistance and fragrance retention properties. Hard and tough, high tensile strength. Good chemical stability, resistant to olefinic acids and alkalis. It has a wide temperature range and can be used at a temperature of -70 ° C to 120 ° C for a period of time at 150 ° C. Good health and safety. It is widely used in poultry meat packaging. A composite film based on PET can be used for cooking food packaging. 4. Polyamide (Pa) is commonly known as nylon, which has strong gas barrier properties, but has poor barrier properties against water vapor, strong water absorption, and swells with increasing water absorption, causing a sharp drop in gas barrier and moisture barrier properties. The strength and stability of the package size are also affected. It has good mechanical properties, good toughness and good wear resistance, cold resistance and heat resistance. The normal operating temperature range is -60 ° C ~ 130 ° C, and the maximum temperature can reach 200 ° C. It has stable chemical properties, good printability and good puncture resistance. The material meets the requirements for food safety regarding hygiene. Therefore, it is widely used in frozen packaging and retort packaging of foods. Due to its good printability and puncture resistance, most of the refined rice currently on the market is made of nylon bags.

We know that the materials used for food packaging must have appropriate barrier properties, such as high resistance to oil and oil and oil resistance; dry foods require high moisture resistance; aromatic foods require high resistance and odor; and fruits and vegetables are fresh. Live foods also require a certain degree of oxygen, carbon dioxide and water vapor permeability; at the same time have good physical and mechanical properties, including tensile strength, tear strength, impact strength, etc.; also have good chemistry Stability, should not have any chemical reaction with the food, to ensure the safety of food. It also has high temperature resistance and is suitable for high temperature sterilization and low temperature storage of food.

Therefore, most of the food packaging on the market is mainly composed of composite plastic film packaging, especially the high barrier material has become the main body of food packaging. Therefore, the first choice should be to consider the requirements of quality, preservation and flavor of the contents. At the same time, when selecting plastic film (bag), we must fully understand the relevant properties of plastics and make reasonable selection.

It is important to note that the plastic film (bag) used for food packaging must comply with the hygienic standard for plastic molded articles of the corresponding materials.

Waste low pressure polyethylene 10 kg

Compatibilizer (EEP) 3 kg

The granules produced by the above two methods can be used as raw materials for bottle products.

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