A kind of rigid polyurethane foam waste recycling spraying method

A technology of rigid polyurethane and foam waste, applied in the direction of coating, device for coating liquid on the surface, etc., can solve the problems of lack of technology and difficulty in recycling and reusing rigid polyurethane, so as to save new materials, reduce pollution, reduce cost effect

Active Publication Date: 2022-04-26
HENAN SANJIE THERMOELECTRIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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  • A kind of rigid polyurethane foam waste recycling spraying method
  • A kind of rigid polyurethane foam waste recycling spraying method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of rigid polyurethane foam waste reuse spraying method, comprises the following steps:

[0020] Step S1, preparing white material, black material and polyurethane regenerated material, the mass ratio of each component is: 1 part of white material, 1 part of black material, 0.1 part of polyurethane grinding material; the white material is polyurethane Rigid foam combined polyether, the black material is isocyanate, and the polyurethane recycled material is the particles made of hard polyurethane foam waste after cleaning and drying, and the particle size of the polyurethane recycled material is 80-400 mesh;

[0021] Step S2, select a fully automatic inner tube spiral transmission line 10 and high-pressure spray foaming equipment 8, the fully automatic inner tube spiral transmission line 10 is provided with a heating device 7 for heating the inner tube, and prepare the inner tube in step S1 The white material and the black material are put into the storage tank of ...

Embodiment 2

[0026] A kind of rigid polyurethane foam waste reuse spraying method, comprises the following steps:

[0027] Step S1, preparing white material, black material and polyurethane recycled material, the mass ratio of each component is: 1 part of white material, 1.5 parts of black material, 0.2 part of polyurethane recycled material; the white material is polyurethane hard Foam combined polyether, the black material is isocyanate, and the polyurethane recycled material is the particles made of hard polyurethane foam waste after cleaning and drying, and the particle size of the polyurethane recycled material is 80-400 mesh;

[0028] Step S2, same as step S2 of embodiment 1;

[0029] Step S3, spraying and foaming. During spraying and foaming, synchronous powder blowing operation is carried out under the high-pressure spray gun 9 of the high-pressure spraying and foaming equipment 8. The inner tube 11 of the heat preservation pipe with a diameter of 1.2 meters advances in a spiral th...

Embodiment 3

[0033] A kind of rigid polyurethane foam waste reuse spraying method, comprises the following steps:

[0034] Step S1, preparing white material, black material and polyurethane recycled material, the mass ratio of each component is: 1 part of white material, 1.5 parts of black material, 0.15 part of polyurethane recycled material; the black material is isocyanate, The white material is polyurethane hard foam combined with polyether, and the polyurethane recycled material is the particles made by washing and drying the rigid polyurethane foam waste, and the particle size of the polyurethane recycled material is 80-400 mesh;

[0035] Step S2, same as step S2 of embodiment 1;

[0036] Step S3, spraying and foaming. During spraying and foaming, synchronous powder blowing operation is carried out under the high-pressure spray gun 9 of the high-pressure spraying and foaming equipment 8. The inner tube 11 of the heat preservation pipe with a diameter of 1.2 meters advances in a spira...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B05D1/12B05D7/24
CPCB05D1/12B05D7/24
Inventor 陈朋张向辉张娇
Owner HENAN SANJIE THERMOELECTRIC TECH
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