Production method of polyurethane foam powder solid waste particles

Abstract

The invention belongs to the technical field of polyurethane solid waste recycling, and particularly discloses a production method of polyurethane foam powder solid waste particles. The method comprises the steps of mixing, compressing, double-roller shaping, compressing roller granulating and sorting; and in the whole process, compressing is carried out for four times, and the bonding strength among polyurethane foam powder is improved through addition of an adhesive so that the size of polyurethane foam powder solid waste can be reduced by 15 times or above, and the particles are good in compactness and uniform in size. According to the method, the transportation cost and the storage cost of the polyurethane foam powder solid waste can be greatly reduced, the polyurethane foam powder solid waste can be conveniently added into the production of boards such as wood-plastic floors and the like, the generation of dust is effectively reduced, and the occurrence of fire disasters is avoided; and meanwhile, the reutilization of waste resources is well realized, and the manufacturing cost of the boards is reduced.

Description

technical field [0001] The invention belongs to the technical field of polyurethane solid waste recycling and utilization, and in particular relates to a production method of polyurethane foam powder solid waste particles. Background technique [0002] With the rapid development of my country's refrigerator manufacturing industry and widespread use, it has led to a sharp increase in discarded refrigerators. According to incomplete statistics, about 20 million refrigerators are discarded in my country every year, and the polyurethane insulation material in each refrigerator is about 7 kg, so about 140,000 tons of polyurethane foam waste is generated annually. Polyurethane foam waste is the powdered polyurethane left after the recycling plant crushes the polyurethane insulation material and recycles the metal. This polyurethane foam powder is a thermosetting plastic with a density of about 40 kg / m3. Except for filling bricks, cement and other building materials, the others are...

AI Technical Summary

Problems solved by technology

Such application has the following problems: due to the low solid waste density of polyurethane foam powder, when it is directly added to the board, to meet the production amount, the foam powder required is huge, which greatly increases the cost of transportation and storage, and the output is low, which will increase Production cost; and adding after compression can increase the output to a certain extent, but it cannot solve the problem of high transportation and storage costs, and it also puts forward higher requirements for process equipment

Therefore, it is difficult to popularize the application of polyurethane foam powder solid waste in boards

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