A kind of rigid polyurethane foam waste recycling spraying method

Abstract

The invention relates to a spraying method for recycling rigid polyurethane foam waste, comprising the following steps: step S1, preparing white material, black material and polyurethane recycled material, the mass ratio of each component is: white material is 1 part, black material The material is 1-1.5 parts, and the polyurethane recycled material is 0.1-0.2 parts; step S2, select a fully automatic inner tube screw transmission line and high-pressure spray foaming equipment, and put the white material and black material prepared in step S1 into the mixing In the material storage box of the material mechanism, the polyurethane regenerated material is put into the material storage tank of the powder blowing device; step S3, spraying and foaming, and the synchronous powder blowing operation is performed under the high-pressure spray gun of the high-pressure spraying and foaming equipment. The invention utilizes scraps, mold overflows and waste products in polyurethane foam production, grinds discarded hard polyurethane materials and adds them to new materials, and realizes polyurethane foaming of insulation pipes without reducing the heat preservation effect, not only New materials are saved, costs are reduced, and environmental pollution is reduced.

Description

technical field [0001] The invention relates to polyurethane spraying and foaming technology, in particular to a spraying method for recycling rigid polyurethane foam waste. Background technique [0002] The recycling of polyurethane materials has been the key research direction of various related companies in recent years. At present, polyurethane foam insulation materials are widely used. In factories producing polyurethane foam insulation materials, a large number of scraps, mold overflows and waste products are produced every year. If Recycling it can not only reduce environmental pollution, but also reduce the production cost of new products, and has good social and economic benefits. [0003] However, after the existing polyurethane foam insulation pipe is foamed, the foam structure formed is rigid polyurethane foam. Compared with soft foam, it is more difficult to recycle rigid polyurethane at present, and a large part of it is directly made Landfill treatment. At pr...

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Problems solved by technology

[0003] However, after the existing polyurethane foam insulation pipe is foamed, the foam structure formed is rigid polyurethane foam. Compared with soft foam, it is more difficult to recycle rigid polyurethane at present, and a large part of it is directly made Landfill treatment. At present, the reuse of rigid polyurethane materials is basically in the research and development stage, and there is no corresponding mature technology for reference.

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