Method for recycling waste paper-plastic or paper-aluminum package material

Abstract

The invention discloses a method for recycling a waste paper-plastic or paper-aluminum package material. The method comprises the following steps: (1) cutting a waste package material into small pieces, washing to remove impurities, and drying; (2) putting the small material pieces into a water-soluble alkali solution, stirring under the constant temperature condition of 50-100 DEG C, so as to enable the alkali solution to dissolve the paper-plastic or paper-aluminum package material of the waste package material into paper pulp fiber and plastic or aluminum foil, thereby obtaining a separation mixture; (3) feeding the separation mixture into a high-frequency defibering machine so as to disperse and defiber the paper pulp fiber, thereby obtaining a defibering mixture; putting the defibering mixture into a slag cleaner, treating to respectively obtain paper pulp fiber and a plastic or aluminum foil material, subsequently drying the paper pulp fiber and the plastic or aluminum foil material so as to obtain a recycled paper pulp, plastic or aluminum foil material. The method has the excellent effects that paper pulp, plastic and aluminum foil are separated and recycled from the waste paper composite package material, and the method is simple in process, controllable in cost, resource-saving and beneficial for ecologic environment.

Description

technical field [0001] The invention belongs to the technical field of recycling processing and recycling of waste resources, and in particular relates to a method for recycling waste paper plastic or paper aluminum packaging materials. Background technique [0002] With the continuous improvement of people's living standards, there are higher requirements for the packaging of goods, such as food, medicine and other packaging, which require that the packaging should also have functions such as shading, heat sealing, and airtight. Therefore, the rapid development of the packaging industry has emerged Composite packaging materials that meet the above requirements. For example, paper-plastic (polyethylene PP, polypropylene PE as a composite of plastic layer and kraft paper) and paper-aluminum composite packaging materials (composite of kraft paper, PP layer, and aluminum film) are common composite packaging paper materials. Because of its safety and sanitation, convenient use ...

AI Technical Summary

Problems solved by technology

[0003] The raw materials used in the production of composite packaging materials need to consume non-renewable petroleum resources or metal resources. In addition, with the change of people's living habits, the packaging that is disposable and disposable has increased, causing a large amount of composite packaging waste to scatter in the environment, which not only wastes precious resources, causing serious pollution to the environment

At present, in terms of the recycling of these waste composite packaging materials, my country's recycling rate is less than 10%, which is far lower than the 50% to 60% recycling rate of similar waste products in developed countries.