The safety of food packaging bags can be guaranteed by the following multi-faceted measures:
Raw material selection
Conformity with standards: Selection of raw materials that conform to national standards for food safety, such as food-grade plastics, paper, metals and so on. These raw materials are strictly tested and do not contain toxic and harmful substances, such as lead, mercury, cadmium and other heavy metals, as well as plasticizers, aromatic amines and other harmful chemicals.
Supplier management: Establish a strict raw material supplier evaluation and selection system to ensure that raw materials are from reliable sources. Suppliers are required to provide quality documents and test reports of raw materials, and suppliers are regularly inspected and audited on site.
Production process control
Hygienic environment: The production workshop should be kept clean and hygienic, and sterilized regularly to prevent microbial growth. Production personnel are required to wear clean working clothes, masks, gloves, etc. and comply with hygienic operating procedures.
Process specification: production is carried out in strict accordance with the established production process and operating procedures, controlling the temperature, humidity, pressure and other parameters in the production process to ensure that the quality of the bags is stable. For example, in the blow molding process of plastic film, the temperature and blowing ratio should be precisely controlled to ensure the thickness uniformity and physical properties of the film.
Additive use: Strictly control the use of additives in terms of type and dosage to ensure that they comply with food safety standards. Additives should have a clear purpose of use, such as antioxidants, plasticizers, etc., and non-food-grade or unauthorized additives should not be used.
Quality Inspection
Physical properties testing: testing the tensile strength, elongation at break, tear strength, heat sealing strength and other physical and mechanical properties of the food packaging bags to ensure that they can withstand a variety of external forces in the process of food packaging and transportation without rupture, leakage and other problems.
Chemical performance testing: Detect the migration of harmful substances in the bags, such as heavy metals, plasticizers, solvent residues. By simulating the storage conditions of food in the packaging, the immersion test is carried out to detect whether the content of harmful substances in the immersion solution exceeds the standard.
Microbiological testing: Microbiological testing of the bags, including total bacteria, mold and yeast counts, coliforms, pathogenic bacteria and other indicators, to ensure that the bags meet the hygiene requirements and do not cause microbial contamination of food.