Regeneration method for waste composite paper film

A composite paper and composite film technology, which is applied in the processing of waste paper, papermaking, paper recycling, etc., can solve the problems of difficult water absorption, inability to be broken into pulp, and unstable ingredient reuse.

Inactive Publication Date: 2007-10-17
吴宸 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. Due to the existence of the plastic film, the paper fiber in this paper film is difficult to absorb water during the regeneration process of soaking in water, so that the paper fiber that is not wetted and swollen cannot be obtained, and cannot be used in the next step. The beating operation section of the road is broken into pulp;
[0006] 2. It is necessary to separate paper fiber, plastic film, and aluminum foil from the waste composite paper film, but the products obtained from the three often contain the other two or one of the two, and the inclusion content is still Fluctuating, this will bring the trouble of product instability to the reuse of the ingredients of these three recycled materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Ingredients: Take 100 parts of "Tetra Pak" waste composite paper beverage box paper material collected from the society, put it in a rubbing and tearing disperser, add 450 parts of water, and 0.01 part of sodium methylene bismethyl naphthalene sulfonate , the pH of the feed liquid is 7±0.2;

[0064] Implementation of the separation step (1) operation: start the motor, stir at room temperature for 20 minutes and start to release the feed liquid containing the paper fiber, and the discharged feed liquid will filter the paper fiber therein through conventional solid-liquid separation process and mechanical separation. Take it out after washing to obtain paper fiber pulp that can be used in the papermaking industry; the washed water is discharged into the clean water tank, and about 450 parts of the purified water in the clean water tank are pumped and added to the rubbing and tearing disperser. For the separation of membrane materials, add an appropriate amount of sodium m...

Embodiment 2

[0072] Get about 100 parts of the plastic film obtained in Example 1 that has removed paper fibers and aluminum, place it in a pool that can store 2000 parts of water, add water, then stir the plastic film material to loosen it, and let it stand , pick up the plastic film on the upper layer of the pool water, these lighter plastic films are polyethylene or / and polypropylene plastic film materials separated by water flotation; and those that sink in the water or at the bottom are miscellaneous waste plastics with a larger specific gravity, These include halogenated polyolefin waste plastics containing heavy metal stabilizers;

[0073] The polyethylene or / and polypropylene plastic film material that this example water flotation method separates obtains, adopts known technology to carry out the granulation regeneration of plastics, just can obtain the regenerated polyethylene or / and polypropylene that can be used in the plastic products industry Plastic particles;

[0074] The m...

Embodiment 3

[0076] After the separation step (1) of Example 1, only an appropriate amount of aluminum-plastic composite film material remains, and the known plastic granulation regeneration technology is used to granulate this aluminum-plastic composite film material to obtain Recycled polyethylene or / and polypropylene plastic particles containing aluminum foil shavings are used as conductive or antistatic and reflective raw materials in the plastic products industry and waterproof coil industry.

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Abstract

A regeneration method for waste composite paper film material includes a separation step (1) and a separation step (2), wherein the separation step (1) mainly separates mostly paper fiber, and the separation step (2) further separates plastic film or / and plastic-aluminum composite film. The method including two steps can increase quality and quantity of regenerating paper, and reduce content of the plastic film and aluminum foil in the regenerating paper. The waste composite paper film material can be separated and regenerated without pollution, and can be used as raw material or auxiliary material for paper industry, rubber and plastic product industry and aluminum industry, wherein all kinds of recovery components are utilized.

Description

technical field [0001] The present invention proposes a recycling and utilization method of paper film waste mainly composed of paper fibers, plastics and aluminum foil, which involves regeneration treatment of solid wastes such as waste paper and waste plastics, and belongs to the technology of environmental protection and comprehensive utilization of solid wastes category. Background technique [0002] Composite paper and film waste refers to paper composed of paper fiber and plastic film or / and aluminum foil, or "paper" film composed of plastic film and aluminum foil. Composite paper film materials have been expanding their application fields in recent years. For example, the boxed dairy products and beverages purchased from supermarkets today are replaced by a composite paper branded as "Tetra Pak". For packaging, this "Tetra Pak" paper is a composite paper film material made of wood pulp fiber, polyethylene or / and polypropylene plastic film, and aluminum foil; Many no...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/02B29B17/00
CPCY02W30/62Y02W30/64
Inventor 吴宸澔
Owner 吴宸
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