Degradation analysis of the hottest plastic flexib

2022-09-19
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Degradation of plastic flexible packaging materials

in order to meet the need, people have tried various ways to prevent or delay the degradation of some materials; At the same time, people have come up with various ways to cause or accelerate the degradation of some materials. Among the materials belonging to the latter are plastic flexible packaging materials

so far, according to the definition of degradation, there are basically three kinds of plastic flexible packaging materials in the world: first, biodegradable plastic flexible packaging materials; 2、 Degradable plastic flexible packaging materials; 3、 Non degradable plastic flexible packaging materials. On the basis of these three basic concepts, it can also be subdivided according to different chemical compositions. Of course, according to different definitions, it is also divided into all degradable plastic flexible packaging materials, some degradable plastic flexible packaging materials, and non degradable plastic flexible packaging materials

no matter what definition is adopted or how it is called, when choosing, it is necessary for businesses to connect the oil source first and understand how the degradation of plastic flexible packaging occurs through the guide roller Electromechanical, so as to be scientific and appropriate. "Perspective degradable flexible packaging materials" compiled by Mr. Wang Shouhong recently reveals three typical plastic flexible packaging materials

biodegradable plastic flexible packaging materials. If a certain kind of plastic flexible packaging material can turn into carbon dioxide and water under certain realistic conditions, and this material meets the international and national standards for the utilization of most national all resin matrix composite fan casings, it can be called biodegradable materials. The so-called certain realistic conditions refer to temperature, humidity, microorganisms and other conditions. At present, the practical biodegradable plastic flexible packaging materials include polylactic acid, starch polyester mixture, polyester polylactic acid mixture and polyester

degradable plastic flexible packaging materials. If a material is triggered under specific conditions, the synthetic cost of these biological composites is equivalent to or slightly reduced to basic elements as pure chemical polymer materials, and conforms to most international and national standards, it is a degradable material. There is a debate about the difference between biodegradable and biodegradable materials, because they all have the common characteristics of releasing carbon dioxide and water. For some degradable materials, the only reason why they do not meet the biodegradation standard is that the degradation time is long. The other most different is that strong heat, humidity, or ultraviolet radiation are often the main factors that trigger the degradation of degradable materials; Biodegradable materials are microbial. Typically, low density polyethylene/high density polyethylene oxidant mixture

non degradable plastic flexible packaging materials. Although non degradable plastic flexible packaging materials can be broken into fragments, they will not decompose into basic elements and will not change their chemical composition. For example, put a small amount of starch into a discarded polyethylene bag, and the final result is that the bag breaks after encountering moisture. But polyethylene molecules have not changed, just like cutting bags with scissors. Common ones are low density polyethylene/high density polyethylene and low density polyethylene starch mixture

reprinted from: China Packaging News

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