Introduction to cosmetics packaging the domestic current situation of the direct selling

Synthetic plastics in order to promote industrial development and improve people's living standard has made a great contribution. At the beginning of the development of plastic industry, chemical stability of the composite material is one of the important research content of people are very concerned about and. For decades, its stability has been a good solution. Dramatic is, today its stability has become obstacles to the further development of an important reason. 'agricultural film is a good example. Because is hard to biodegradable, can be used only once, the processing of the easiest way is to set it. Not only waste resource, but also causes pollution of the atmosphere. Waste plastics recycling and utilization, has become a worldwide topic. The traditional landfill and incineration method is gradually replaced by a multiplexing, degradation or decomposition process. The recycling of waste plastic products, not only can protect the environment, save energy, but also has the very good economy. Industry for plastics recycling and utilization of three concepts, namely direct use, conversion and burning or biological decomposition. Conversion as the name implies is used for other purposes. At the same time contains both chemical and physical methods. Chemical methods can be divided into two kinds: the first method is the use of polymer chemistry, polymer into small molecule compounds, or simple. Such as polyester can use hydrolysis, alcohol solution or ammonia solution method into a single or small molecular compounds. Hydrolysis reaction is the reverse reaction of polyester synthetic reaction, can be made into terephthalic acid and ethylene glycol ( Polyester synthetic raw material monomer) ； Methanol methyl alcohol solution can get terephthalic acid and ethylene glycol; Ethylene glycol alcoholysis products for terephthalic acid double hydroxyl ethyl ester; Propylene oligomer ChunChun solution, for the synthesis of unsaturated polyester ( Paint or ink) And with alkyd resin. Another method is to use plastic flammability, burned to produce heat energy to generate electricity. The two methods have advantages and disadvantages, chemical decomposition method, the resource utilization is higher, but the process is complex, high cost, thus affecting the recycling of plastic products. Incineration of waste gas, such as PVC ( Polyvinyl chloride (PVC) film) Containing chlorine gas produced by the body after combustion, is a component of acid rain, many other plastics produced by incomplete combustion exhaust gas, does great harm to the environment and human health, so this method has a tendency to be eliminated.