Plastic adhesion layer cleaning agent as well as plastic cleaning process and equipment adopting same

Abstract

The invention relates to a plastic adhesion layer cleaning agent as well as a plastic cleaning process and equipment adopting the same. The cleaning agent comprises the following components in percentage by mass: 6-12 percent of a master solvent, 25-38 percent of a cosolvent, 1-3 percent of an activating agent, 2-4 percent of a thickener, 1-2 percent of a surfactant and the balance of water, wherein the master solvent is dimethyl sulfoxide or propylene carbonate; the cosolvent comprises the following components in percentage by mass: 38-50 percent of monohydric alcohol or polyhydric alcohol, 24-36 percent of phenylcarbinol and 20-32 percent of polyhydric alcohol ether. The cleaning process comprises the following steps: crushing plastic to form plastic fragments; putting the plastic fragments and the cleaning agent into a reaction kettle according to a mass ratio of 1: 2; heating to 65-75 DEG C in a sealed manner and stirring for 20-40 minutes; leading the cleaning agent out for recycling; separating and dehydrating the plastic fragments and stripped substances of the adhesion layer to obtain a recycled plastic finished-product; and periodically extracting liquid in a separating tank and recovering the cleaning agent. The equipment comprises the reaction kettle, the separating tank, an extracting pot, a liquid storage pot and a reflux condenser.

Description

technical field [0001] The invention relates to the technical field of plastic recycling, in particular to a plastic adhesive layer cleaning agent, a plastic cleaning process and cleaning equipment using the cleaning agent. Background technique [0002] With the development of the plastics industry, plastics with different properties are widely used as important raw materials in machinery, electronics, medical care, and various fields of life, such as optical discs, electrical device housings, auto parts, building pipes, plates, household appliances and toys, etc. ; Since waste plastics contain high-end plastics and a large amount of ordinary plastic production raw materials, they have huge potential economic value, and at the same time, they themselves constitute environmental problems. Therefore, the recycling of a large number of waste plastic products has also become a critical issue for resource reuse. However, since many plastic products are attached with an adhesive l...

AI Technical Summary

Problems solved by technology

The solvents of existing organic paint removers mainly contain dichloromethane, ethyl acetate, acetone, benzene, toluene, chloroform, etc., but the organic paint removers still have the following problems in use: (1) by dissolving and chemical reaction to remove paint , which is a consumable agent, has fast failure and cannot be recycled for one-time use, which not only increases the process cost, but also pollutes the environment; ⑵Because of its solubility in plastics, it modifies plastics and reduces the quality of recycled plastics; ⑶The above organic paint removal The agent can only remove the paint layer and ink layer, but cannot remove the above-mentioned metal foil layer, adhesive layer and protective film layer; (4) low boiling point, volatile, and large loss; (5) strong Odor, harmful to the health of operators

Therefore, how to develop a cleaning agent that can simultaneously remove the paint layer, ink layer and other material adhesion layers and overcome the above-mentioned organic paint remover's rapid failure, non-recyclable, polluting environment, volatile and strong odor for the above defects The shortcomings of the industry have become a concern in the industry

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