Physical And Mechanical Properties Of Food Packaging Bags

Including tensile strength and elongation at break, it reflects the product's ability to withstand tension during use. If this item is not qualified, food packaging bags are prone to cracking and damage during use.
In addition, it also includes gas barrier indicators such as gas permeability; Oil resistance index, heat resistance, cold resistance, and medium resistance; The sealing and peeling force of the bag, the pressure resistance and drop resistance of the bag, and other indicators reflect the reliability of food packaging bags in protecting the inner packaging.
The processing of plastic film bags must go through the process of heating, and plastic has problems of cracking, oxidation, degradation, and deterioration when heated. Therefore, when processing plastic film or bags with resin, additives such as antioxidants and heat stabilizers should be added to the resin. Some packaging film bags require anti-static, anti condensation, and high smoothness due to the packaging process and mechanical or content requirements. Therefore, additives such as anti-static agents, anti fogging agents, lubricants, and opening agents should also be added. All these additives must first undergo experimental testing in GB15139 "Food Safety Toxicology Evaluation Procedure" and be proven to be non-toxic before use, but there is also a limit on the amount of additives added. So, in the product, these low molecular weight substances that can be extracted, namely evaporation residue or things that can be oxidized and deteriorated, namely potassium permanganate consumption, cannot exceed the specified amount, and beyond that, they cannot be used. Therefore, there should be corresponding hygiene standards for molded products, with the aim of preventing indiscriminate use and abuse of additives, and better ensuring that materials directly packaged and in contact with food have high hygiene and safety performance.