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Process of regenerating waste medicine packing aluminium plastic sheet

A composite hard sheet and plastic-aluminum technology, applied in the direction of solid waste removal, non-surface active washing solvents, etc., can solve the problems of resource waste, shedding, unusable, etc., to solve the waste of aluminum resources, reduce the cost of regeneration, wash The effect of high clarity

Inactive Publication Date: 2008-04-23
刘继福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims at the problem that the hard sheet formed after the polyurethane adhesive fails is broken, deformed, peeled off, delaminated and cannot be used, and cannot be reused to cause a large waste of resources. It provides a plastic-aluminum composite hard sheet that can be stripped. The aluminum foil does not wrinkle, can maintain the original elongation and tensile strength, and regenerates the method of manufacturing invalid plastic-aluminum composite hard sheets

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] According to the method provided by the present invention, the plastic-aluminum composite hard sheet is placed in a liquid at 60°C to 100°C to dissociate and separate the aluminum foil plastic film, and the separation of plastic and aluminum is carried out in a liquid with temperature, so that the plastic-aluminum composite hard sheet passes through Liquid in the liquid tank, and keep the temperature of the liquid constant. According to the different tensile forces of the plastic-aluminum, the separated plastic-aluminum layers are respectively rolled into the front and rear rollers of the peeling machine in reverse, and the slow-speed operation is carried out to strip and rewind, so as to completely remove the failed plastic-aluminum composite hard sheet The plastic-aluminum film layer is peeled off and wound on two rollers in different directions. When peeling, the plastic-aluminum composite hard sheet placed in a liquid at a temperature of 60°C or above, the plastic-a...

Embodiment 2

[0016] The plastic-aluminum composite hard sheet was peeled off according to the method of the above-mentioned embodiment 1, and the step of separating the aluminum foil and the plastic film remained unchanged. Similarly, the dried aluminum foil is placed on the coating machine, and dimethyl sulfone is used to coat and remove the polyurethane adhesive remaining on the surface of the aluminum foil layer. The effect is ideal. Because dimethyl sulfone MSM is an organic sulfide, it is used as a gas chromatography stationary liquid, food additive and drug in industry. It is known that its ability to enhance the production of insulin in the body promotes the metabolism of carbohydrates and is an essential substance for the synthesis of collagen in the human body. It promotes wound healing and also acts on the synthesis and activation of B vitamins, vitamin C, and biotin needed for metabolism and neurological health. Human skin, hair, nails, bones, muscles and various organs contai...

Embodiment 3

[0018] The plastic-aluminum composite hard sheet was peeled off according to the method of the above-mentioned embodiment 1, and the step of separating the aluminum foil and the plastic film remained unchanged. Similarly, the dried aluminum foil is placed on the coating machine, and the polyurethane adhesive remaining on the surface of the aluminum foil layer is removed by coating with dimethyl sulfoxide. The effect is also ideal. Because dimethyl sulfoxide (DMSO) is an aprotic polar solvent. The molecular formula is (CH3)2SO, it is a colorless transparent viscous liquid at room temperature, bitter in taste, slightly smelly and slightly alkaline. It has high polarity, high hygroscopicity, high boiling point, extremely low toxicity, and good thermal stability. It is soluble in most organic substances such as water, ethanol, acetone, benzene, and chloroform, but not easily soluble in alkanes. It is a strong polar solvent. , has strong permeability to the human body. This prod...

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Abstract

The process of regenerating waste medicine packing aluminum-plastic sheet includes setting waste medicine packing aluminum-plastic sheet in some liquid at temperature over 60 deg.c to separate plastic layer from the aluminum layer, winding the separated plastic layer from the aluminum layer separately onto two drums, stoving the aluminum foil and washing in non-protonic organic solvent to eliminate residual adhesive, and adhering the cleaned aluminum foil to plastic film with new polyurethane adhesive to form the regenerated aluminum-plastic sheet. The present invention has complete stripping of aluminum foil and complete cleaning, and the regenerated aluminum-plastic sheet has high quality the same as new one.

Description

technical field [0001] The invention relates to a manufacturing method for regenerating plastic-aluminum composite hard sheets used for food and medical packaging after failure. It can be considered that the method involved in the present invention can also be used for stripping and regeneration of non-medical plastic-aluminum composite hard sheets. Background technique [0002] As an advanced composite material, aluminum-plastic composite packaging is widely used in product packaging for food, medicine, and chemical industries, and its usage is increasing year by year. Because the aluminum-plastic plate and aluminum-plastic composite film are plastic-aluminum composite hard sheets bonded together by aluminum and plastic, once the adhesive fails, it will not be able to form solid drug blister packaging and can only be discarded and incinerated, and cannot be used for aluminum smelting , It is also impossible to produce recycled plastics, and at the same time it has deepened...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09B3/00C11D7/50
Inventor 刘继福
Owner 刘继福
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