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Method for recycling and separating paper, aluminum and plastic packaging boxes

A separation method and packaging box technology, applied in the direction of plastic recycling, recycling technology, solid waste removal, etc., can solve the problems of high cost, large usage, and inability to recycle plastics, and achieve low cost, high recycling efficiency, and convenience The effect of recycling and reuse

Active Publication Date: 2013-02-13
南通壹选智能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, experimental studies have found that when single organic solvents such as acetone and methylene chloride are used, it is almost impossible to separate the plastic from the aluminum foil, while when using a single organic solvent such as benzene, LDPE will be directly dissolved, and the plastic cannot be recycled
Therefore, a single organic solvent has defects such as large usage, high cost, and poor separation effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Cut the paper-aluminum-plastic packaging box into a block size of 40×40mm, and disperse it in a hydraulic disperser with a rotational speed of 500r / m, a pH of 7, a temperature of 40°C, and a mass concentration of the slurry of 1%. 20 minutes, and then use a slotted screen with a slot width of 0.1mm to screen. During screening, the mass concentration of the slurry is 0.8%. The pulp fibers obtained after screening are used for high-value utilization of cellulose, and the rest are aluminum-plastic composite materials. ;Put the obtained aluminum-plastic composite material and separating agent into a container at a constant temperature of 60°C at a solid-to-liquid ratio of 60g / L, ensure that the liquid amount of the separating agent is immersed in the aluminum-plastic material, and stir gently for 3 minutes to completely separate the aluminum. For plastic, the separated aluminum plastic is first cleaned with a 50% ethanol solution to remove benzene on the aluminum plastic, an...

Embodiment 2

[0018] Cut the paper-aluminum-plastic packaging box into 50×50mm block size, and disperse it in a hydraulic disperser with a rotation speed of 700r / m, a pH of 7, a temperature of 50°C, and a mass concentration of the slurry of 3%, and the dispersing time is 15min, and then screened with a slotted screen with a slot width of 0.13mm. During screening, the mass concentration of the slurry was 0.9%. The pulp fibers obtained after screening were used for high-value utilization of cellulose, and the rest were aluminum-plastic composite materials. ;Put the obtained aluminum-plastic composite material and liquid separating agent into a container with a constant temperature of 60°C at a solid-to-liquid ratio of 60g / L, ensure that the liquid amount of the separating agent is immersed in the aluminum-plastic material, and stir gently for 6 minutes to completely separate To remove the aluminum plastic, the separated aluminum plastic is first cleaned with a 60% ethanol solution to remove th...

Embodiment 3

[0022] Cut the paper-aluminum-plastic packaging box into 50×50mm block size, and disperse it in a hydraulic disperser with a rotating speed of 1000r / m, a pH of 8, a temperature of 50°C, and a slurry concentration of 5%. A slotted sieve with a slot width of 0.15mm is used for screening. When screening, the mass concentration of the slurry is 1.0%. The pulp fibers obtained after screening are used for high-value utilization of cellulose, and the rest are aluminum-plastic composite materials; The aluminum-plastic composite material and the liquid separating agent are placed in a container with a constant temperature of 60°C at a solid-liquid ratio of 60g / L to ensure that the liquid amount of the separating agent is immersed in the aluminum-plastic material, and the aluminum-plastic composite material can be completely separated by stirring slightly for 10 minutes. , the separated aluminum plastic is first cleaned with an 80% ethanol solution to remove benzene on the aluminum plast...

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Abstract

The invention provides a method for recycling and separating paper, aluminum and plastic packaging boxes. The method comprises the steps of: taking the paper, aluminum and plastic packaging boxes; dispersing in a hydraulic dispersion machine; screening and separating out pulp fibers for cellulose high-value use, wherein the rest are the aluminum and plastic composite materials; mixing the obtained aluminum and plastic composite materials with a separating agent, stirring slightly until separating out aluminum and plastic completely; and finally cleaning the separated aluminum and plastic respectively. The separating method of the invention is low in cost, high in recycling efficiency, and does not cause environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of separation of composite packaging materials, and relates to a method for recycling and separating paper, aluminum and plastic packaging boxes. Background technique [0002] The paper-aluminum-plastic packaging box represented by Tetra Pak is a high-humidity packaging carton made of paper, aluminum foil and polyethylene plastic, which can be used for liquid food such as milk, juice, soybean milk, coffee, wine, etc. Package. The packaging generally has 6 layers, which can effectively block all factors that affect the deterioration of milk and beverages. Among them, the contents of cardboard, polyethylene plastic and aluminum foil are 73%, 20% and 5% respectively. [0003] There are three main technical solutions for the recycling of traditional paper-aluminum-plastic packaging boxes: (1) Hydraulic recycled pulp technology: the pulp in the paper-aluminum-plastic packaging box is separated to make paper aga...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00B09B5/00B29B17/02C08J11/06
CPCB29L2009/003B29B17/02Y02W30/62
Inventor 张素风张璐璐梅星贤王娟娟杨恒林晓雷
Owner 南通壹选智能科技有限公司
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