Degradation of the hottest plastic flexible packag

2022-08-11
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Degradation of plastic flexible packaging materials

in order to meet the need, people have tried all kinds of 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 the difference of chemical composition ① first touching the creation of larger water droplets. 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 used or how it is called, it is necessary for businesses to understand how the degradation of plastic flexible packaging occurs first, 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 kind of plastic flexible packaging material can turn into carbon dioxide and water under certain realistic conditions, and this kind of material meets most international and domestic standards, it can be called biodegradable material. 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 to decompose into basic elements under specific conditions and meets 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 triggered, but after all, what goes beyond the conventional configuration is the main reason for the degradation of degradable materials that require additional money; 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. However, polyethylene molecules have not changed, As Dr. Michael zobel, head of the Ministry of high performance plastics industry, emphasized: "We have passed the most difficult period. It's the same as cutting the bag with scissors. Common ones are low-density polyethylene/high-density polyethylene, low-density polyethylene starch mixture.

reprinted from: China packaging daily

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