Industrializable waste thermosetting plastic regeneration process and equipment based on mechanical and physical method

A thermosetting and physical method technology, applied in the direction of mechanical material recycling, plastic recycling, recycling technology, etc., can solve the problems of large decline in mechanical properties of products, difficulties in reusing and recycling, and difficulty in recycling, etc., to achieve recycled materials. High utilization rate and utilization value, no secondary pollution, and the effect of industrial application

Inactive Publication Date: 2012-04-18
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thermosetting plastics are mainly used in harsh environments such as heat insulation, wear resistance, insulation, and high voltage resistance. They have excellent performance, but thermosetting plastic products are often designed for long-term use, so they are difficult to destroy, and difficult to reuse and recycle. , because thermosetting plastics cannot be melted and plasticized again, recycling is extremely difficult
[0003] At present, there are three recycling methods for waste thermosetting plastics. One is physical recycling, which is to add particles as fillers to new materials to improve material performance. This method only changes the physical form of materials, and the process is simple and the product cost is low. It has good versatility, but its application is narrow, its economic value is not high, and the mechanical properties of the product are greatly reduced; the other is chemical recycling, which converts waste into chemical raw materials or other substances through chemical methods. The process is complicated and suitable for Poor performance and high production cost; another is the energy recovery method, which, like chemical recovery, is prone to produce toxic and harmful substances, causing secondary pollution to the environment and requiring large investment in equipment

Method used

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  • Industrializable waste thermosetting plastic regeneration process and equipment based on mechanical and physical method
  • Industrializable waste thermosetting plastic regeneration process and equipment based on mechanical and physical method
  • Industrializable waste thermosetting plastic regeneration process and equipment based on mechanical and physical method

Examples

Experimental program
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Effect test

Embodiment 1

[0070] In Example 1, waste and old thermosetting phenolic laminated plastics are taken as an example:

[0071] Firstly, waste and old thermosetting phenolic laminated plastics are cleaned and dried by a washing machine 1 and a dryer 2, and then transported to a crusher 4 by a first-stage conveyor belt 3 to be broken into lumps, and the lumps are sent by a second-stage conveyor belt 5 Transported to the raw material bin 9 of the regeneration device 6, the material is dropped into the regeneration device 6 by the raw material bin 9 through the lower hopper 8;

[0072] Close the feeding port on the lower hopper 8, open the gas valve of the nitrogen cylinder 11, nitrogen enters the cavity of the regeneration device 6 through the gas compressor 12 through the pipeline, and open the gas valve of the steam generator 13 at the same time, and the water vapor is introduced through the pipeline In the cavity of regeneration device 6, utilize temperature sensor 7 to display the temperatur...

Embodiment 2

[0078] Present embodiment 2 is an example with waste and old thermosetting rigid polyurethane plastics:

[0079] The regeneration process is the same as in Example 1, wherein the rotating speed of the shearing knife shaft 19 is 2000n / min, and the time to complete the degradation is 70 minutes. Due to the low strength of the thermosetting hard polyurethane plastic, the static grinding disc and the moving grinding disc can be selected from the grinding teeth to form an arc. In the form of a linear grinding disc, in this example, isocyanate and water are added to the raw material bin 9 to enhance the regeneration effect, and the degradation and regeneration products of waste thermosetting polyurethane are directly subjected to compression molding in the mold without vibration screening.

[0080] The experimental results show that: after pulverization and regeneration of thermosetting rigid polyurethane plastics, through the microstructure characterization test, the polymer network...

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Abstract

The invention discloses an industrializable waste thermosetting plastic regeneration process and equipment based on a mechanical and physical method. The invention is characterized in that: firstly, waste thermosetting plastics are cleaned and dried to obtain a raw material; secondly, the raw material is crushed to obtain a blocky standby material; finally, the blocky standby material is placed in a regeneration environment of steam with nitrogen as protection gas and is degraded through the treatment processes of shearing, grinding and stirring in the regeneration environment so as to obtain a degraded regeneration product. The invention enables the scope and approach of cyclic reutilization of thermosetting plastic waste to be developed and provides a novel regeneration method for comprehensive utilization of thermosetting plastic waste which is difficult to regenerate.

Description

technical field [0001] The present invention relates to an industrialized recycling process and equipment for waste and old thermosetting plastics, more specifically, an industrialized recycling process and equipment for waste and old thermosetting plastics based on mechanical physical methods Background technique [0002] Thermosetting plastics are linear or branched before curing. After curing, a three-dimensional network crosslinked structure is formed between molecular chains. Not only can they not be heated and melted, but they cannot be dissolved in solvents. Commonly used thermosetting plastics are plastics made of phenolic, polyurethane, epoxy, unsaturated polyester, etc. and their modified resins. Thermosetting plastics are mainly used in harsh environments such as heat insulation, wear resistance, insulation, and high voltage resistance. They have excellent performance, but thermosetting plastic products are often designed for long-term use, so they are difficult t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00B29B17/04
CPCY02W30/52Y02W30/62
Inventor 刘志峰吴仲伟石磊杨雪峰胡建赵建潘绍波
Owner HEFEI UNIV OF TECH
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