Preparation method of composite material prepared from paper mill sludge and plastic

Abstract

The invention discloses a preparation method of a composite material prepared from paper mill sludge and plastic. The preparation method of the composite material prepared from the paper mill sludge and the plastic comprises the following steps that the paper mill sludge is treated, and fibers in the paper mill sludge are recovered; the waste plastic is recycled and treated, and pure plastic is obtained; and the recycled plastic and fiber are heated and mixed, then the mixture is placed in a screw device or a plastic mixing mill to be mixed and then extruded out of a mold, and then cutting isperformed to prepare the composite material; the treatment method of the paper mill sludge comprises the following steps of pretreatment, drying, crushing and screening, specifically, the pretreatmentis performed with the weight of the paper mill sludge as the standard. According to the preparation method of the composite material prepared from the paper mill sludge and the plastic, the plastic recycling effect is good, the method is simple and convenient, the content of recycled plastic components is high, the performance of the plastic is well preserved, the separated solvent can be furtherrecycled, the economical efficiency of the technology is improved, the method can simply, conveniently and efficiently recycle the plastic, and the recycling rate can reach 90% or above.

Description

technical field [0001] The invention relates to the technical field of papermaking sludge and plastic recycling, in particular to a preparation method of papermaking sludge and plastic manufacturing composite materials. Background technique [0002] In order to protect the dwindling forest spontaneous combustion resources, it is an inevitable trend in the paper industry to use waste paper to produce recycled paper. However, a large amount of waste is generated in the process of producing recycled paper and paper, which brings serious environmental problems. There are many ways to recycle papermaking sludge. Longer fibers are used to make fiber composite materials; sludge with more fibers can be used to produce lactic acid; sludge can also be used as fuel to recover energy, etc. And due to the mass production, consumption and short use cycle of plastics, the amount of plastic waste has increased dramatically. A large amount of plastic waste not only causes a huge waste of r...

AI Technical Summary

Problems solved by technology

And due to the mass production, consumption and short use cycle of plastics, the amount of plastic waste has increased dramatically

The massive waste of plastics not only causes a huge waste of resources, but also brings great harm to the environment: polluting the soil and oceans, and producing a large amount of toxic substances through incineration.

[0003] However, the existing papermaking sludge and plastic recycling are complicated and the recycling rate is not high. Therefore, it is urgent to design a preparation method for papermaking sludge and plastic manufacturing composite materials to solve the above problems

Images