Material special for pipes and preparation method of material

Abstract

The invention provides a preparation method of a material special for pipes. The preparation method comprises the following steps: a) cleaning recovered waste polyethylene, and crushing to obtain crushed polyethylene; and b) mixing the crushed polyethylene obtained in the step a) with a cross-linking agent and calcium carbonate, and performing extruded granulation, thereby obtaining the material special for pipes. Compared with the prior art, the preparation method provided by the invention has the advantages that the recovered waste polyethylene serves as the main raw material and is subjected to molecular repair and performance reduction in the presence of a specific process by adopting specific components, so that the material special for pipes with excellent rigidity and toughness is prepared, and other various indexes of the product can reach the novel material level. Moreover, according to the preparation method provided by the invention, the recovered waste polyethylene can be fully utilized, pollution of solid wastes to the environment is reduced, the production cost is greatly reduced, and the material has obvious economic and environmental-friendly benefits.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a special material for pipes and a preparation method thereof. Background technique [0002] Due to the rapid development of the world economy, polyethylene has become the main raw material for chemical synthetic resins. The demand for it marks the petrochemical level of a country and people's living standards. According to the statistics of China Business Information Network, the output of plastic products in my country in 2014 It has exceeded 70 million tons; however, the annual recycling rate of waste plastics in my country is very low. From 2011 to 2013, the recycled waste plastics are only 13 million to 16 million tons per year, which is only about 26% to 30% of consumption. Due to the strong corrosion resistance of unrecycled plastics, the problem of environmental pollution caused by a large amount of waste plastics that are difficult to degrade is becoming more and...

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Problems solved by technology

[0002] Due to the rapid development of the world economy, polyethylene has become the main raw material for chemical synthetic resins. The demand for it marks the petrochemical level of a country and people's living standards. According to the statistics of China Business Information Network, the output of plastic products in my country in 2014 It has exceeded 70 million tons; however, the annual recycling rate of waste plastics in my country is very low. From 2011 to 2013, the recycled waste plastics are only 13 million to 16 million tons per year, which is only about 26% to 30% of consumption. Due to the strong corrosion resistance of unrecycled plastics, and the large amount of waste plastics that are difficult to degrade, the problem of environmental pollution is becoming more and more serious, which has affected the social natural environment and human health.

[0003] In order to reduce environmental pollution, it is necessary to recycle waste plastics efficiently. In some developed countries abroad, they use garbage collection systems to keep the recycling rate of waste plastics at about 10%. However, the current way of recycling waste plastics in my country is still relatively backward. This method is low in efficiency and labor-intensive, and the original performance of the plastic is greatly reduced due to repeated melting during the recycling process, which cannot meet the needs of consumers, nor can it adapt to the needs of market development. thus limiting its scope of application

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