Talking about the most popular active packaging ma

2022-08-01
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Random talk on food active packaging materials the concept of "active" packaging materials comes from the concept opposite to the usual "inert" packaging materials. Generally speaking, the "active" packaging materials can maintain the characteristics of the packaging contents, so that they are not affected by environmental factors; It also contains a functional packaging material that can improve the characteristics of the packaging contents. In the food packaging industry, the definition of active packaging is mainly based on the system proposed by the European special research center that can improve the conditions of packaging materials (by releasing substances, eliminating or inhibiting), prolong the service life of packaging materials, improve health and safety, and improve odor and taste characteristics. At the same time, its quality is guaranteed to remain unchanged

although the technology of using plastic with high barrier to oxygen and its application in packaging has been very mature, the oxygen content can be minimized (for example, the oil tank of vacuum or modified pneumatic tensile testing machine also needs to be cleaned regularly), However, there is still a strong demand for reducing the oxygen content in the packaging so that the parts manufacturers can achieve better lightweight effect on the current mass production molds without any change to the molds. One popular development is beer bottle caps coated with oxygen suppressants. With this kind of oxygen inhibitor, PET bottles can be used instead of glass bottles to fill beer, and the original flavor and taste of beer will remain unchanged for about 9 months after bottling. In addition, the composite film with this kind of oxygen inhibitor can be widely used in various packaging occasions, and its activation needs to be stimulated by certain factors. For example, shelfplus 02 series oxygen suppressants produced by Ciba of Switzerland can be activated by the humidity of food or by the combination of humidity and temperature in the pasteurization process, so as to play a role. OSP series oxygen suppressants produced by CPChem are activated by ultraviolet radiation. Oxygen suppressants isolate oxygen from the air and usually do not come into direct contact with food

ethylene trapper ethylene is a carbon hydrogen phase monomer extracted from petroleum to realize industrial production, which is mainly used in the production of polyethylene plastics. Surprisingly, ethylene can also be produced in the metabolism of plants. It acts as a catalyst to ripen and soften fruits. If ethylene accumulates in the packaging materials, the fresh fruits and vegetables sold in sealed packaging will soon rot and deteriorate. In order to reduce the accumulation of ethylene, people use a small bag of ethylene trapping agent placed in the package to remove ethylene first. Practice has proved that the use of potassium permanganate is very effective, but potassium permanganate is harmful to human body, so it can not be directly used in food packaging. Other minerals that are very effective in removing ethylene monomers include zeolite, cristobalite and some kinds of carbonates

antimicrobial agents food deterioration is mainly caused by microorganisms. Adding fungicides to food can play a good role. Facts have proved that adding antibacterial agents to plastic packaging materials can also achieve good results, especially for PVC products in humid environment. This kind of plastic is required to have the function of inhibiting microorganisms. 12. The annual inspection system is strictly implemented, and the National Metrology and identification institution regularly carries out parameter identification and certification. A large number of biodegradable plasticizers are contained in the production formula to make the plastic surface easy to flow and form and kill bacteria. The original intention of developing and using antibacterial agents for sterilization is to kill the bacteria with positive Gram staining. At present, nisine is a popular part of food fungicides, and some organic acids (such as sorbic acid, propionic acid, benzoic acid derivatives) have also been proved to be used as food preservatives

the above active packaging materials are used more and more, and the effect of extending the shelf life of food is also expanding. However, the requirements of food hygiene and safety standards cannot be ignored when applying active packaging materials

(shenxueyou)

reprinted from: China Guomen times

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