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Method for reclaiming optical disk substrate from abandon optical disk

A technology for discarded optical discs and optical discs, which is applied in the fields of plastic recycling, chemical recycling, recycling technology, etc., can solve the problems of complicated process and difficult promotion, and achieve the effect of environmental protection of the process

Inactive Publication Date: 2008-04-09
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is more complex and difficult to promote

Method used

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  • Method for reclaiming optical disk substrate from abandon optical disk
  • Method for reclaiming optical disk substrate from abandon optical disk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Use mechanical methods such as cutters to separate the upper and lower substrates of DVD discs (except CD / VCD). Then take the above-mentioned stripped disc and place it in a pre-configured 20wt% NaOH solution (the volume of the solution is based on the complete immersion of the disc, the same below.), at 50°C and a stirring speed of 400r / min, stir 30min. Then the optical disc in the above solution was taken out and washed with water, placed in a pre-configured 10wt% hydrochloric acid solution, heated to 40°C, stirred and reacted at a stirring speed of 800r / min for 50min, and then the optical disc was taken out. Then the optical disc was washed with water and placed in 30wt% ethanol solution, allowed to stand at room temperature for 40 minutes, and then washed with water to obtain a clean and transparent plastic substrate. Finally the ethanol solution is evaporated to recover the alcohol.

Embodiment 2

[0026] The method is as in Example 1, the stripped optical disc is placed in a mixed solution of 5% NaOH and 10% NaCl or a 40% aqueous solution of KClO, and stirred for 30 min at a temperature of 65° C. and a stirring speed of 400 r / min. Other steps and obtained result are with embodiment 1.

Embodiment 3

[0028] Method is as embodiment 1, and the optical disk disc stripped is placed in 30% Na 2 CO 3 In the aqueous solution, stir for 40 min at a temperature of 60° C. and a stirring speed of 400 r / min. Other steps and obtained result are with embodiment 1.

[0029] The qualified rate of above-mentioned experimental result is all greater than 98% (wherein, qualified rate is the percentage of the completely clean and transparent plastic substrate weight that obtains after processing and the optical disc gross weight before processing); The original substrates were scanned with an electron probe, and the results were not significantly different.

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PUM

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Abstract

A method of recycling a compact disk substrate from waste discs pertains to the field of the electronic waste recycling technology. The invention has the following techniques: stripping treatment: the disc is put in alkali solution, alkaline salt solution, alkali solution including corresponding halide, or hypo-halogen acid salt solution one by one to isolate a printing layer and an aluminum layer from the CD. After being washed, other metals of the CD can be further separated by pouring acid liquor, and the CD is washed again and then put into the ethanol solution to strip the dye layer; separation and recovery: The CD substrate is taken out of the ethanol solution, and is washed in water to recycle plastic substrate. In the end, the ethanol is evaporated and recovered. The method has the advantages of realizing the recycle and the utilization of resources while reducing the environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of recycling electronic wastes, and in particular relates to a method for recovering disc substrates from discarded discs. The substrates in the discarded discs are separated, recovered and reused from metal layers, dye layers and the like. Background technique [0002] Optical disc is a plastic disc coated with a special dye layer or metal layer. It is widely used in various industries as a data and information storage medium. A large amount of CD solid waste will be generated when CDs are discarded due to damage or content upgrading during use, which will pose a threat to the environment. With the increasing number of discarded optical discs and the advancement of waste sorting and recycling management, the recycling and green treatment of waste optical discs is also increasingly necessary. [0003] The basic structure of an optical disc is shown in Figure 1 and Figure 2. The main structure of a recordabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B17/02C08J11/00B09B3/00
CPCB29L2017/005B29K2705/00B29K2069/00B29B17/02B29B2017/0296Y02P20/582Y02W30/62
Inventor 王志汪玉华郭占成公旭中林荣毅王明涌陈彦广
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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