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Method for preparing shaping clay from waste plastics and shaping clay prepared by using method

A technology of waste plastics and plastics, applied in the production of bulk chemicals, etc., can solve problems such as safety and environmental hazards, human health hazards, social resource waste, etc., and achieve the effects of good weather resistance, simple curing method, and strong plasticity

Inactive Publication Date: 2017-04-19
CHINA ACAD OF ART
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, with the improvement of living standards, the application of plastic materials is increasing, so the amount of waste plastics is also increasing, causing huge pollution to the environment; therefore, the treatment and processing of waste plastics are also more and more popular. Attention, now the common waste plastic recycling process, one is crushing, granulation and regeneration. This type of treatment has a great possibility of illegally remanufacturing waste plastics as daily plastics. Unknown waste plastics entering daily life will be harmful to human health, etc. The other type is incineration to generate electricity as garbage. Although this type of application can convert waste plastics into electric energy and contribute to society, the incineration of waste plastics not only has huge safety and environmental risks, but also A huge waste of social resources, so continue a safe and economical waste plastic disposal method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing plastic clay from waste plastics, comprising the following steps:

[0035] a) Classification: Classify waste plastics according to raw materials, and collect polyethylene phthalate plastics, high-density polyethylene plastics, low-density polyethylene plastics, polypropylene plastics, polystyrene plastics and polyvinyl chloride plastics;

[0036] b) Mixing: The sorted waste plastics are mixed according to the weight ratio of polyethylene phthalate plastics, high-density polyethylene plastics, low-density polyethylene plastics, polypropylene plastics, polystyrene plastics and polyvinyl chloride plastics. 30:20:60:25:10:8 for mixing and crushing into 100-mesh plastic mixture;

[0037] c) Hydrolysis: Add the mixed and pulverized plastic particles into the hydrothermal reaction kettle, then add an appropriate amount of water to control the temperature in the reaction kettle to 370°C and the pressure to 22MPa, the reaction time is 20 minutes, and then ...

Embodiment 2

[0042] A method for preparing plastic clay from waste plastics, comprising the following steps:

[0043] a) Classification: Classify waste plastics according to raw materials, and collect polyethylene phthalate plastics, high-density polyethylene plastics, low-density polyethylene plastics, polypropylene plastics, polystyrene plastics and polyvinyl chloride plastics;

[0044] b) Mixing: The sorted waste plastics are mixed according to the weight ratio of polyethylene phthalate plastics, high-density polyethylene plastics, low-density polyethylene plastics, polypropylene plastics, polystyrene plastics and polyvinyl chloride plastics. 32:28:76:28:11:9 for mixing and crushing into 120-mesh plastic mixture;

[0045] c) Hydrolysis: Add the mixed and pulverized plastic particles into the hydrothermal reaction kettle, then add an appropriate amount of water to control the temperature in the reaction kettle to 380°C and the pressure to 23MPa, the reaction time is 23 minutes, and then ...

Embodiment 3

[0050] A method for preparing plastic clay from waste plastics, comprising the following steps:

[0051] a) Classification: Classify waste plastics according to raw materials, and collect polyethylene phthalate plastics, high-density polyethylene plastics, low-density polyethylene plastics, polypropylene plastics, polystyrene plastics and polyvinyl chloride plastics;

[0052] b) Mixing: The sorted waste plastics are mixed according to the weight ratio of polyethylene phthalate plastics, high-density polyethylene plastics, low-density polyethylene plastics, polypropylene plastics, polystyrene plastics and polyvinyl chloride plastics. 34:32:74:32:11:11 for mixing and crushing into 140-mesh plastic mixture;

[0053] c) Hydrolysis: Add the mixed and pulverized plastic particles into the hydrothermal reaction kettle, then add an appropriate amount of water to control the temperature in the reaction kettle to 385°C and the pressure to 23MPa, the reaction time is 28 minutes, and then...

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Abstract

The invention discloses a method for preparing shaping clay from waste plastics and the shaping clay prepared by using the method and relates to the technical field of shaping clay production. The method for preparing the shaping clay from waste plastics comprises the steps of classified screening of waste plastics, proportioned mixing of the waste plastics, supercritical water decomposition treatment, organic solvent immersion and inorganic filler addition and the like. By using the method for preparing shaping clay from waste plastics, no pollution is caused or pollution is caused rarely in the preparation process, environmental hazards and resource waste caused by treating the waste plastics can be relieved, and a new approach is found for treating the waste plastics; and the shaping clay prepared by using the waste plastics has the characteristics such as high plasticity, good weather resistance and simple curing way.

Description

technical field [0001] The invention relates to the technical field of making plastic clay, in particular to a method for preparing plastic clay from waste plastics and the prepared plastic clay. Background technique [0002] Plastic clay is a commonly used material widely used in sculpture and creative design. It has the characteristics of strong plasticity and excellent weather resistance. In the existing market, plastic clay is usually a mixture of some inorganic minerals, such as clay minerals, but this type of plastic clay is difficult to cure and needs to be cured at high temperature; one type is plastic clay based on resin materials, such as PVC Soft pottery as the main raw material, this kind of plastic clay is less difficult to cure, and can be cured in an oven below 200 ° C, but due to its high manufacturing cost, the price is relatively expensive and can only be used to make small sculptures; It is a product such as cement gypsum. Although they are easy to cure, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L67/02C08L23/12C08L25/06C08L27/06C08K13/02C08K3/26C08K3/34C08K5/18C08K5/132C08K5/11C08K5/3437C08K5/12C08J3/00
CPCC08J3/00C08J2323/06C08J2423/06C08K2201/014C08L23/06C08L2205/025C08L2205/035C08L2207/062C08L2207/066C08L2207/20C08L67/02C08L23/12C08L25/06C08L27/06C08K13/02C08K2003/265C08K3/346C08K3/34C08K5/18C08K5/132C08K5/11C08K5/3437C08K5/12Y02P20/54
Inventor 朱发运
Owner CHINA ACAD OF ART