Method for preparing wood-plastic composite from waste masks

A technology of wood-plastic composite materials and masks, applied in the field of materials, can solve problems such as low efficiency, backward recycling methods, secondary pollution, etc., and achieve the effects of long service life, reduced pressure, and not easy to be eaten by insects

Inactive Publication Date: 2020-08-28
南京浦世环境科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the recycling methods of discarded masks are relatively backward, mainly concentrated incineratio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing wood-plastic composite materials by utilizing waste masks, comprising the steps of:

[0021] (1) Collect the discarded masks in an airtight container, spray the discarded masks with a disinfectant (sodium hypochlorite solution with an effective chlorine concentration of 500mg / L-1000mg / L), and let them stand for 24 hours to obtain a disinfected mask;

[0022] (2) drying the sterilized mask, then cutting and crushing to a particle size of 0.05-1 mm to obtain mask particles;

[0023] (3) Add the mask particles to the electrostatic separator for electric separation (the working parameters of the electrostatic separator are: power is 2.2kw, speed is 1000r / min, and the output particle size is 200-400μm), and then added to the flotation machine Carry out flotation (the impeller speed of the flotation machine is 1000rpm, the gas flow rate is 100L / h, and the flotation time is 4min. The preparation method of the medicament used in the flotation: add methyl ...

Embodiment 2

[0026] In step (4), the polypropylene grafted maleic anhydride consumption is 20 parts, and all the other are identical with embodiment 1.

Embodiment 3

[0028] In step (4), the polypropylene grafted maleic anhydride consumption is 30 parts, and all the other are identical with embodiment 1.

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Abstract

The invention relates to a method for preparing a wood-plastic composite from waste masks. The method comprises the steps of disinfecting the waste masks through a disinfectant, drying the disinfectedmasks, cutting and brushing the masks to obtain mark particles, feeding the mask particles into an electrostatic separator for electric separation, feeding the mask particles into a flotation machinefor flotation to obtain polypropylene granules, adding wood flour and polypropylene grafted maleic anhydride to the polypropylene granules, mixing evenly, conducting mixing in an open mixing machine,conducting hot-pressing molding and conducting cooling to obtain the wood-plastic composite. Through the method provided by the invention, recycling of the masks is realized, the pressure of a refuselandfill is reduced, and the problem of secondary pollution of abandoned medical refuse is solved. The wood-plastic composite prepared through the method has the excellent mechanical performance, strong acid and alkaline resistance, water resistance and corrosion resistance, and is long in service life, free of bacteria breeding, not likely to be damaged by worms, free of fungi and suitable for serving as a building material, a furniture material and the like.

Description

technical field [0001] The invention relates to a method for recycling waste masks, in particular to a method for preparing wood-plastic composite materials by using waste masks, which belongs to the field of material technology. Background technique [0002] Affected by the novel coronavirus epidemic, more and more small and medium-sized enterprises have joined the ranks of producing masks, the production capacity of masks is increasing day by day, and the amount of discarded masks continues to increase. Disposable medical masks, medical surgical masks, N95, KN95 masks, etc. are all made of polypropylene melt-blown cloth as the main raw material. As a high molecular polymer, polypropylene has a stable chemical structure at room temperature and is difficult to degrade naturally. Therefore, if the discarded masks are not treated in a targeted manner, it will inevitably cause the problem of accumulation and pollution of discarded medical materials. [0003] In July 2019, the ...

Claims

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Application Information

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IPC IPC(8): B29B17/00B29B17/02B29B17/04B29C35/02B29B7/72C08L23/12C08L97/02C08L51/06
CPCB29B17/00B29B17/02B29B17/04B29C35/02B29B7/726C08L23/12B29B2017/0265B29B2017/0248C08L2205/16C08L2205/03C08L2207/20C08L97/02C08L51/06Y02W30/52Y02W30/62
Inventor 虞嘉希柏小东赵良
Owner 南京浦世环境科技发展有限公司
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