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Recycling method of metallized polypropylene electrical film waste film

An electrical film and polypropylene technology is applied in the field of recycling and utilization of metallized polypropylene electrical film waste film, which can solve the problems of ineffective utilization of plated metal, ineffective utilization of polypropylene, and difficulty in utilization of electrical film, etc. The effect of easy operation, low environmental impact and low disposal cost

Inactive Publication Date: 2016-04-20
TONGLING CITY TIANYUAN NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is a layer of zinc-aluminum metal coating on the waste film, it is difficult to use this waste film as an electrical film
Usually these waste films are sent to plastic processing enterprises by recycling companies, added to other plastics, and used to make plastic packaging bags with low value, so that polypropylene cannot be effectively used, resulting in waste of resources; at the same time, the coated metal is not obtained. effective use, and even cause environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The inventive method is as follows:

[0016] (1) Cut the waste metallized polypropylene film into pieces whose length and width are no more than 1m for use;

[0017] (2) Put the above film fragments into the dilute sulfuric acid washing solution with a concentration of 15-30%, soak and stir for 8-10 hours, add dilute sulfuric acid during the washing process to maintain the pH of the washing solution at 2.6-3;

[0018] (3) Take out the soaked film fragments from the washing liquid and rinse with water to remove the remaining washing liquid on the surface;

[0019] (4) drying the washed film fragments;

[0020] (5) Polypropylene particles that can be used as raw materials for capacitor plastic parts such as electrical films or casings and positioning sleeves are made according to conventional methods.

[0021] Cutting the metallized polypropylene film waste film into film fragments is beneficial to speed up the dilute acid washing and water washing operations.

[0022]...

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PUM

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Abstract

The invention relates to a recycling method of waste metalized polypropylene electrical thin films. According to the recycling method, the waste metalized polypropylene electrical thin films are cut into thin film chips; the thin film chips are immersed in dilute sulfuric acid washing liquid, and are subjected to immersing and stirring for 8 to 10h, wherein pH value of the dilute sulfuric acid washing liquid is maintained to be 2.6 to 2.7; the thin film chips are washed with water, are dried, and are made into polypropylene particles which can be used as raw materials of electrical thin films. The recycled polypropylene particles can be used as raw materials of polypropylene electrical thin films or capacitor plastic components; coating metal can be recycled effectively; sources can be saved; and influence on the environment is less. The recycling method is simple; operation is easy; and processing cost is low.

Description

technical field [0001] The invention relates to a recycling method of metallized polypropylene electrical film waste film. Background technique [0002] Metallized polypropylene electrical film is the main raw material for making capacitors. Due to the production process of metallized polypropylene electrical film, due to equipment failure, operation error and other reasons, waste film will inevitably be produced; in addition, a large number of leftovers that need to be cut and formed during the production of capacitors are also produced. It is used in production to form waste film. This waste film accounts for about 3% of the total. Taking Anhui Tongfeng Electronics Co., Ltd. as an example, the annual output of various metallized polypropylene electrical films is about 2,200 tons, and about 66 tons of waste films are produced. Because there is a layer of zinc-aluminum metal coating on the waste film, it is difficult to utilize this waste film as an electrical film. Usua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29B9/00B29B17/00
CPCY02W30/62
Inventor 周建斌吴平张小红陈静
Owner TONGLING CITY TIANYUAN NEW ENERGY TECH