Progress of Wuhan handern Plastic Packaging Film
DATE：2020/5/17 8:20:59 / READ： / SOURCE：This station
Progress of Wuhan handern Plastic Packaging Film
Wuhan handern Plastic Packaging Film, and with the compounding of plastic film and other new materials, the development of processing technology and packaging machinery, the development of various technologies of plastic film from the packaging characteristics of materials, packaging skills to a new era, adapting to social The demand for packaging promotes the development of society, which in turn promotes the development of plastic films. In this way, problems continue to arise, problems are solved, and progress is made, which is manifested in the following two aspects: www.handern.com breathable membrane equipment1. The protection and preservation function of plastic film www.handern.com breathable membrane equipment
The protection and preservation functions are particularly prominent in food packaging. The packaging film requirements for food are strict. The resin, various additives of packaging materials, and the harmful problems of food additives, such as the preservation material AF2 [2 (2-furanyl) 3 (5-nitro, 2-furylacrylamide)] is prohibited. Most of the toxicity problems of antioxidants BHT, DHA, plasticizers DBP, DOPDOA, vinyl chloride monomer (VCM), etc. have been studied and solved. Regulations; and there are various difficulties in solving the problems of preventing the change of the standard concentration of children. Set the environmental conditions for preservation, such as temperature management, namely temperature preservation. In order to maintain the quality of fresh food, such as ① the decomposition of enzymes for food, the decomposition of foreign bacteria, yeast and other hygienic substances; ② the chemical action mainly based on oxidation; ③ the physical action mainly based on drying, etc. www.handern.com Breathable membrane equipment
To prevent its deterioration, these storage low temperature effects are very important. In response to this, modern freezing technology, partial freezing (partial freezing) utilization technology, etc .; as well as the use of cold storage agent, or insulation packaging, to achieve the development of cold storage. Depending on the type of food contained, storage conditions, shelf life, circulation conditions, etc., the technologies used for freezing, cold storage, ice temperature, partial freezing, super refrigeration, etc. are closely related to the packaging materials and packaging methods. In addition, the widespread use of new food film packaging technology methods for low temperature resistance of packaging materials required for low temperature processing and low temperature management, such as vacuum packaging, gas replacement packaging, cooking packaging, and drying (cold resistance), must also be fully considered. The deoxidizer is sealed in human packaging, aseptic packaging, etc. In addition, in terms of freshness preservation, the fresh fruits are packed with absorption and removal of ethylene gas to remove aging hormones to prevent ripening. A CA (controlled homosphere effect) effect that adjusts the gas composition of the package is adopted to prevent the microorganisms from acting on fresh food (fresh fruits, fresh fish, pork, etc.) to inactivate the microorganisms, and a functional film is used. In addition, it has developed film packaging, tray packaging and other related technologies for the purpose of water retention, flavor retention, aroma retention, tissue fiber retention, water droplets and gravy removal and absorption. www.handern.com Breathable membrane equipment
Second, the cold resistance and heat resistance of the film
The above-mentioned freezing temperature management is to maintain the rapid freezing and reach the temperature of the brine treated in an extremely low temperature in a very short time. At present, the liquid nitrogen freezing device that has been developed to replace the conventional table salt (NaCL) and propanol, such as ethanol brine and calcium chloride (CaC2) brine freezing devices, is increasingly developing environmental preservation technology under low temperature conditions. In order to withstand these extremely low temperature environments (using liquid ammonia or liquid CO2, the temperature in the store is 45 ° C, and the food center temperature is below -18 ° C), the film used must have the necessary performance (maintain strength, prevent embrittlement, deformation, Due to freezing fixation and resistance to other packaging barriers). In addition, for the preservation of food, heat treatments such as boiling and steaming are used, as well as the heat treatment of microwave ovens used by consumers for cooking food (more than 50% in some countries), and the heat treatment of food that has been cooked Therefore, the heat resistance of the packaging container is only 120 ℃. When heating or cooking oil-containing foods, the packaging material depends on the type of food. The packaging material must have a heat resistance of 230 ° C or higher. www.handern.com Breathable membrane equipment
In this case, most of the packaging materials are sachet packaging, tray packaging, film, sheet molding packaging, and as food containers, they should meet the two extreme conditions of refrigeration, frozen storage, low temperature circulation, and high temperature cooking. Various heat-resistant packaging films and sheets researched and developed to meet the above conditions have entered the market. www.handern.com Breathable membrane equipment
Author：admin