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Modification recovery method for waste plastic

A recycling method and waste plastic technology, applied in the field of waste plastic recycling, can solve the problems of unsuitability for industrialized production, complex procedures, damage to plastic mechanical properties, etc., and achieve the effects of facilitating industrialized production, improving recycling performance, and high practical value

Inactive Publication Date: 2015-03-04
TIANJIN LISHUN PLASTIC PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing recycling of waste plastics is mainly to classify the waste plastics according to the material, and then heat and plasticize them again. In the process of adding plasticization to the recycled plastics, the plastic macromolecular chains will be depolymerized due to uneven heating or high temperature. , the original plastic additives will also be lost, greatly destroying the mechanical properties of the plastic, making the secondary processed recycled plastic unable to reach the performance index of the new material
The modification procedures of recycled plastics in the prior art are complex and costly, and are not suitable for industrial production

Method used

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  • Modification recovery method for waste plastic
  • Modification recovery method for waste plastic
  • Modification recovery method for waste plastic

Examples

Experimental program
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Effect test

Embodiment 1

[0015] The recycled waste PET plastics are crushed, cleaned, dehydrated and dried to remove water to obtain waste plastic raw materials, mixed with improver at a weight ratio of 95:5, and then added to a granulator for blending and granulation to obtain masterbatches.

[0016] Ratio of modifier components: 0.5% 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, 2-(2'-hydroxy-5'-methylphenyl)benzotriazepam oxazole 2%, dioctyl phthalate 2%, polyethylene wax 0.2%, 2,2-methylenebis(4-methyl-6-butylphenol) 2%.

Embodiment 2

[0018] The recycled waste PET plastics are crushed, cleaned, dehydrated and dried to remove water to obtain waste plastic raw materials, mixed with improver at a weight ratio of 98:2, and then added to a granulator for blending and granulation to obtain masterbatches.

[0019] Ratio of modifier components: 0.5% 2,5-dimethyl-2,5-di-tert-butylperoxyhexane, 2-(2'-hydroxy-5'-methylphenyl)benzotriazepam oxazole 2%, dioctyl phthalate 2%, polyethylene wax 0.2%, 2,2-methylenebis(4-methyl-6-butylphenol) 2%.

Embodiment 3

[0021] The recycled waste PET plastics are crushed, cleaned, dehydrated and dried to remove water to obtain waste plastic raw materials, mixed with improver at a weight ratio of 95:5, and then added to a granulator for blending and granulation to obtain masterbatches.

[0022] Ratio of modifier components: 2,5-dimethyl-2,5-di-tert-butylperoxyhexane 1%, 2-(2'-hydroxy-5'-methylphenyl)benzotriazepam oxazole 5%, dioctyl phthalate 5%, polyethylene wax 0.5%, 2,2-methylene bis(4-methyl-6-butylphenol) 5%.

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Abstract

A modification recovery method for waste plastic is disclosed. The following technical scheme is employed: 1) performing crushing, cleaning, dewatering and baking water removal on classified waste plastic to obtain a waste plastic raw material; 2) uniformly mixing the waste plastic raw material and a modifier according to the weight ratio of 95-98:5-2; 3) adding the mixed material into a pelletizer for blending and pelletizing; and 4) performing extrusion molding on master batch by an extruder. The modifier comprises the following compositions in percent by weight: 0-1% of a crosslinking agent, 1-5% of a light stabilizer, 1-5% of a plasticizer, 0.1-0.5% of a lubricant and 1-5% of an anti-oxidant. The beneficial effects comprise that the method has relatively good improvement on recovery of all waste plastic, and enables the performances of products prepared by using recovered plastic as a raw material to be relatively close to those of an original product. The method is simple in technology, low in cost and convenient for industrialized production, has relatively high utility value and can help to obtain relatively high economic profit.

Description

technical field [0001] The invention relates to the field of recycling waste plastics, in particular to a method for modifying and recycling waste plastics. Background technique [0002] The extensive use of plastic products has brought environmental pollution while facilitating people's lives. In order to solve the "white pollution" caused by plastics, research mainly focuses on degradable plastics and plastic recycling. Due to the high cost of research and development of degradable plastics and the inability to achieve secondary utilization, the research on plastic recycling is more worthy of development. The existing recycling of waste plastics is mainly to classify the waste plastics according to the material, and then heat and plasticize them again. In the process of adding plasticization to the recycled plastics, the plastic macromolecular chains will be depolymerized due to uneven heating or high temperature. , the original plastic additives will also be lost, great...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/06C08L27/06C08L23/12C08K5/00C08K5/14C08K5/17C08K5/12C08J3/22
Inventor 窦华利
Owner TIANJIN LISHUN PLASTIC PRODS
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