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Technique for producing high-purity PET (polyethylene terephthalate) granules from waste reflecting films

A process method and technology of reflective film, applied in the field of waste material utilization, can solve the problems of personal electrocution, affecting the safe operation of the power grid, etc., and achieve the effect of eliminating hidden safety hazards, improving industrial value, and huge social and economic benefits.

Inactive Publication Date: 2014-04-09
YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The reflective film is very light in weight, and the surface is coated with a metal reflective layer, which is conductive. In case of strong winds, it is easy to be scraped on the power line, causing tripping, power outages, and even personal electric shock fatal accidents, which seriously affects the safe operation of the power grid.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: a kind of processing method utilizing waste and old reflective film to produce high-purity PET pellet, it comprises the steps:

[0023] a. First, clean the waste reflective film and crush it until the length of the reflective film is less than 1cm;

[0024] B. adopt the sodium stearate emulsion that weight concentration is 2% to go out the reflective layer of reflective film, the weight ratio of sodium stearate emulsion and reflective film is 8:1;

[0025] c. Separate and recycle the removed reflective film waste by filtering, and dry at 60°C for 6 hours;

[0026] d. Add 2 parts of plasticizer octyl phthalate and 4 parts of petrolatum in 100 parts of reflective film material after separation and recovery by weight and stir evenly;

[0027] e. Add 0.18 parts of sucrose, 0.22 parts of glycerin and 2.6 parts of linear low density polyethylene in parts by weight to 100 parts of reflective film that has been stirred evenly;

[0028] f. Add 0.1 part of tribasi...

Embodiment 2

[0030] Embodiment 2: a kind of processing method utilizing waste and old reflective film to produce high-purity PET grain, it comprises the steps:

[0031] a. First, clean the waste reflective film and crush it until the length of the reflective film is less than 1cm;

[0032] B. Adopt the fatty acid surfactant emulsion that weight concentration is 8% to go out the reflective layer of reflective film, the weight ratio of fatty acid surfactant emulsion and reflective film is 12:1; Fatty acid surfactant emulsion is magnesium stearate, polyethylene Mixed water emulsion of glycol 2000 and polyethylene glycol 4000;

[0033] c. Separate and recover the removed reflective film waste by filtering, and dry at 80°C for 4 hours;

[0034] d. Add 2 parts of dimethyl phthalate, 2 parts of diethyl phthalate, 8 parts of petrolatum, 1 part of lead stearate, 1 part of reflective film material by weight in 100 parts of reflective film materials after separation and recovery. Parts of calcium s...

Embodiment 3

[0038] Embodiment 3: a kind of processing method utilizing waste and old reflective film to produce high-purity PET grain, it comprises the steps:

[0039] a. First, clean the waste reflective film and crush it until the length of the reflective film is less than 1cm;

[0040] B. Adopt the polyethylene glycol 6000 emulsion that weight concentration is 5% to come out of the reflective layer of reflective film, the weight ratio of polyethylene glycol 6000 emulsion and reflective film is 10:1;

[0041] c. Separate and recover the removed reflective film waste by filtering, and dry at 70°C for 5 hours;

[0042] d. Add 3 parts of octyl phthalate and 6 parts of glyceride, 0.6 part of lead stearate, 0.4 part of calcium stearate in parts by weight in 100 parts of reflective film materials after separation and recovery and stir evenly;

[0043] e. Add 0.5 part of sucrose, 0.6 part of glycerin, and 5 parts of linear low-density polyethylene to the mixture of 100 parts of reflective fil...

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Abstract

The invention discloses a technique for producing high-purity PET (polyethylene terephthalate) granules from waste reflecting films, which comprises the following steps: cleaning waste reflecting films, and pulverizing; extracting reflecting layers with a fatty acid surfactant emulsion, carrying out separation and recovery by filtration, adding a plasticizer and a lubricant, and evenly stirring; adding a nucleating agent, and evenly stirring; adding a heat stabilizer to react; and granulating with reactive extrusion forming equipment. The method has the advantages of simple production process, no pollution and high purity of the obtained PET material, and is an ideal method for recovering waste reflecting films.

Description

Technical field: [0001] The invention relates to a process method for producing high-purity PET (polyethylene terephthalate) pellets by using waste reflective film, and belongs to the technical field of waste material utilization. Background technique: [0002] In recent years, in order to improve the harvest and quality of crops and fruits, reflective film has been widely used in various fields of agricultural production. The reflective film is very light in weight, and the surface is coated with a metal reflective layer, which is conductive. In case of strong wind, it is easy to be scraped on the power line, causing tripping, power outage, and even personal electric shock death, which seriously affects the safe operation of the power grid. According to statistics, line failures caused by reflective film account for more than 30% of the total number of failures every year, and there is an upward trend. Therefore, the power supply department needs to spend a lot of manpower ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/02C08L23/06C08K5/00C08K5/12C08K5/098C08K5/1545C08K5/053C08K3/30C08J7/00
Inventor 邢国秀刘诗丽李林冯圣权王云波姜陆海
Owner YANTAI POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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