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Waste rigid polyurethane foaming plastic recycling and use method

A technology of rigid polyurethane and foamed plastics, applied in planting substrates, botanical equipment and methods, applications, etc., can solve problems such as resource waste and environmental pollution, and achieve the effect of efficient recycling

Active Publication Date: 2019-05-21
山东新亚科技服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At first, the most direct way for people to deal with these wastes was to incinerate or bury them, which caused serious pollution to the environment and a serious waste of resources.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039]A method for recycling waste rigid polyurethane foam plastics. Firstly, the waste rigid polyurethane foam plastics are sheared and crushed, and then ground after the shear crushing, and the waste rigid polyurethane foam is removed during the shear crushing and grinding process. Surfactants are added to the foamed plastics, and the grinding is continued until the obtained waste rigid polyurethane foamed plastics powder has a particle size of 30 μm to 40 μm, a volumetric water absorption rate of 100% to 200% and a porosity of 90% to 95%. High-quality polyurethane foam powder is used for water-absorbing powder;

[0040] The surfactant is made of the following raw materials by mass: 4 parts of sucrose fatty acid ester, 5 parts of soybean lecithin, 4 parts of dodecylbenzenesulfonic acid and 75 parts of water;

[0041] The mass of the added surfactant accounts for 2% of the mass of the waste rigid polyurethane foam.

Embodiment 2

[0043] A method for recycling waste rigid polyurethane foam plastics. Firstly, the waste rigid polyurethane foam plastics are sheared and crushed, and then ground after the shear crushing, and the waste rigid polyurethane foam is removed during the shear crushing and grinding process. Surfactants are added to the foamed plastics, and the grinding is continued until the obtained waste rigid polyurethane foamed plastics powder has a particle size of 30 μm to 40 μm, a volumetric water absorption rate of 100% to 200% and a porosity of 90% to 95%. High-quality polyurethane foam powder is used for water-absorbing powder;

[0044] The surfactant is made of the following raw materials in parts by mass: 3 parts of sucrose fatty acid esters, 4 parts of soybean lecithin, 5 parts of dodecylbenzenesulfonic acid and 80 parts of water;

[0045] The mass of the added surfactant accounts for 1.5% of the mass of the waste rigid polyurethane foam.

Embodiment 3

[0047] A method for recycling waste rigid polyurethane foam plastics. Firstly, the waste rigid polyurethane foam plastics are sheared and crushed, and then ground after the shear crushing, and the waste rigid polyurethane foam is removed during the shear crushing and grinding process. Surfactants are added to the foamed plastics, and the grinding is continued until the obtained waste rigid polyurethane foamed plastics powder has a particle size of 30 μm to 40 μm, a volumetric water absorption rate of 150% to 200% and an open porosity of 90% to 95%. High-quality polyurethane foam powder is used for water-absorbing powder;

[0048] The surfactant is made of the following raw materials in parts by mass: 5 parts of sucrose fatty acid ester, 4 parts of soybean lecithin, 4 parts of dodecylbenzenesulfonic acid and 70 parts of water;

[0049] The mass of the added surfactant accounts for 2% of the mass of the waste rigid polyurethane foam.

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PUM

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Abstract

The invention provides a waste rigid polyurethane foaming plastic recycling and use method which comprises the following steps: firstly, carrying out shearing crushing, grinding, adding a surfactant in the shearing crushing and grinding process, and continuously grinding till the particle size of obtained waste rigid polyurethane foaming plastic powder is smaller than or equal to 40 [mu]m, the volume water absorption rate is greater than or equal to 100% and the aperture ratio is greater than or equal to 90%. Under coactions of a mechanical action and a chemical action, closed cell foams are changed into opened cell foams, then the foams have water-absorbing quality and can be used as a water absorption powder material; the material can be mixed with fermentation culture seeds, carbohydrate and excrement below livestock beds in net bed breeding, and a composted fertilizer can be prepared through direct in-situ fermentation; the material can be also used as a medium of medium cultivation of soilless culture; the water absorption powder material has very wide application, and thus waste rigid polyurethane foaming plastics can be recycled and used with environmental protection, energyconservation and high efficiency.

Description

technical field [0001] The invention relates to the technical field of waste rigid polyurethane foam recycling, in particular to a method for recycling waste rigid polyurethane foam. Background technique [0002] Rigid polyurethane foam has many excellent properties such as toughness, wear resistance, heat insulation, solvent resistance, and aging resistance, making it widely used in: refrigeration equipment—such as refrigerators, freezers, cold storage, refrigerated vehicles, etc., polyurethane Rigid foam is the most ideal insulation material for refrigeration equipment; industrial equipment insulation - such as storage tanks, pipes, etc.; building insulation materials - in developed countries in Europe and the United States, polyurethane rigid foam for construction accounts for about 70% of the total consumption of rigid foam, is More than double the amount of rigid foam insulation materials such as refrigerators and freezers; transportation industry—such as car roofs, int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05F17/00C05G3/00A01G24/48A01G24/35
CPCY02W30/40
Inventor 孟扬徐春花
Owner 山东新亚科技服务有限公司
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