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Reuse method for plastic handset sheathing material

A mobile phone shell and plastic technology, which is applied in the direction of mechanical material recycling, plastic recycling, recycling technology, etc., can solve the problems that the product is difficult to control accurately, the pressure, temperature and additives are not easy to control, and it is not easy to control.

Inactive Publication Date: 2006-09-27
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The patent does not involve the recycling technology of the mobile phone casing, nor does it involve the removal technology of the plastic surface coating. At the same time, the patent uses a thermal degradation method, the process is complicated, and the pressure, temperature and additives (catalyst) in the process are not easy to control. , high energy consumption, and requires high-temperature and high-pressure containers, which is a safe and professional operation. At the same time, the reaction product is a mixture, and the product is difficult to control accurately, and the final product performance is unstable or difficult to control.

Method used

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  • Reuse method for plastic handset sheathing material

Examples

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Effect test

example 1

[0027] Select 1kg of engineering alloy plastic marked with "PC+ABS" on the inside of the plastic case, manually remove the metal leads and embedded brass screw holes, put the mobile phone case into the sandblasting box for surface sandblasting, the air pressure is 0.5MPa, and the sand grains The diameter is 5mm, and the time is 30min. The surface pigment coating and adhesive parts are all peeled off and mixed into the sand particles. After being collected by winnowing (wind speed 10m / s), they are incinerated at 1300°C; the plastics without surface coating are taken out and cleaned with compressed air. (Air flow pressure 0.5MPa) After blowing off the surface debris, enter the pulverizer for crushing, select a screen with a diameter of 5mm, and separate the metal in the shell through wind selection (wind speed 30m / s), the metal is mainly stainless steel, non- The metal is an engineering plastic alloy (PC+ABS). Put the plastic granules into the extrusion granulator to granulate, ...

Embodiment 2

[0030] Select 1kg of polycarbonate plastic marked with "PC" on the inside of the shell, mechanically cut and remove the metal leads and embedded brass screw holes, put the mobile phone shell into the sandblasting box for surface sandblasting, select the airflow pressure 1.0MPa, and the sand grains The diameter is 3mm, and the time is 30min. The surface pigment coating and adhesive parts are all peeled off and mixed into the sand particles. They are collected by the water spinning method (the centrifugal speed of the particles is 100rpm, and the resting time is 20s after stopping the centrifugal rotation). They are incinerated in an incinerator at 1300°C. No environmental pollution; take out the plastic without surface coating, and use compressed air (air flow pressure 1.0MPa) to blow off the surface impurities, then enter the pulverizer for crushing, select the screen diameter of 2mm, and use the electrostatic method to remove the metal in the shell Separation, the air temperat...

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Abstract

The method of recovering plastic cellphone casing material belongs to the field of waste electronic product recovering and reusing technology, and aims at ensuring the pollution-less development of electronic industry. The plastic cellphone casing material recovering process includes the following steps: eliminating metal wires and brass parts from the casing, sorting into PC and PC+ABS, sand blasting to eliminate surface coating and adhered parts, crushing and sieving, gravitational sorting to separate metal from non-metal material, recovering metal material, cleaning non-metal material, adding small amount of assistant and extruding to pelletize or into plastic product. The method of the present invention has high production efficiency, high performance of the recovered material, low cost, and less pollution.

Description

technical field [0001] It belongs to the technical field of resource recovery and reuse of waste electronic products to ensure the pollution-free and sustainable development of the electronic industry. Background technique [0002] The invention is a recycling treatment method researched and developed aiming at the plastic shells produced by a large number of discarded mobile phones at present. All countries in the world are facing the problem of recycling waste electronic products. Among electronic and electrical products, mobile phones are a communication tool with a very high elimination rate. Although its designed service life is generally around seven or eight years, people are replacing their mobile phones faster and faster as the design size of mobile phones is getting smaller and smaller, with more functions and lower prices. Statistics show that the average replacement cycle for global mobile users is about 2 years, and in some economically developed countries and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/00B29B9/00B29B17/04B09B3/00
CPCY02W30/52Y02W30/62
Inventor 夏志东毛倩瑾王素云史耀武雷永平郭福李旸钟涛兴
Owner BEIJING UNIV OF TECH
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