Method for recycling waste polyurethane rigid foamed plastic

Abstract

The invention discloses a method for recycling waste polyurethane rigid foamed plastic. The method comprises the following steps: grinding the waste polyurethane rigid foamed plastic into particles which can sieve by 60 mesh sieves; then adding a paste detergent according to a mass ratio of the waste polyurethane rigid foamed plastic particles to the paste detergent of 1:(0.2 to 0.6); placing the mixture into an auger machine to uniformly stir the mixture; and after packaging, obtaining a detergent for washing oil stain or stainless steel products polluted by dirt. According to the invention, as the waste polyurethane rigid foamed plastic particles are mixed with the paste detergent, friction generated when the detergent is in contact with skin and adsorption of the detergent to the oil stain are effectively improved; and moreover, due to the crisp and soft particles, damage to the skin cannot be caused. The method has the advantages that on one hand, the waste polyurethane rigid foamed plastic is recycled; and on the other hand, one detergent which is very suitable for garagemen or machine repair workers to use is obtained and the effect of really changing waste into valuable is realized.

Description

technical field [0001] The invention relates to a method for recycling waste polyurethane rigid foam plastics. Background technique [0002] Rigid polyurethane foam, referred to as rigid polyurethane foam, has excellent characteristics such as good heat insulation effect, light weight, high specific strength, and convenient construction. It also has the characteristics of sound insulation, shockproof, electrical insulation, heat resistance, cold resistance, and solvent resistance. It is used for the insulation layer of refrigerators and freezers, insulation materials for cold storage and refrigerated trucks, insulation materials for buildings, storage tanks and pipelines, etc. [0003] Currently, during the production of rigid polyurethane foam products, a certain amount of offcuts are produced. In addition, after refrigerators and freezers are scrapped and disassembled, many rigid polyurethane foams are also produced. The current waste rigid polyurethane foam is usually d...

AI Technical Summary

Problems solved by technology

The burial method invades the land, and the incineration method produces serious air pollution. At the same time, these two methods will also cause a huge waste of polyurethane resources.

[0004] Auto repairers or mechanic workers are in urgent need of a special cleaning product because they are exposed to heavy oil such as gasoline, diesel, and engine oil, and it is difficult to clean the oil with ordinary detergents.