Method of using steel slag as filler for plastic product

A technology for plastic products and fillers, which is applied in the field of fillers for plastic products, can solve the problems of waste utilization and high cost of fillers, and achieve the effects of reducing dimensional shrinkage, improving heat resistance and improving dimensional stability.

Inactive Publication Date: 2006-10-18
陈涛
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  • Summary
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above fillers fail to achieve waste utilization, and the cost is relatively high

Method used

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Embodiment Construction

[0007] Scrap steel slag is brown and mainly contains CaO, SiO2, Al2O3, Fe2O3. The scrap steel slag is mechanically deironed and ground to obtain a powdery substance. According to different waste plastic processing techniques and types, the particle size can also be different. Injection molding, extrusion molding The particle size should be 100-150 mesh (147μm-104μm), and the particle size of blow molding and blown film should be 150-200 mesh (104μm-74μm). Then the steel slag powder is used as a filler and mixed with plastic or waste plastic regenerated particles and extruded through a screw extruder.

[0008] In order to ensure that the scrap steel slag filler is well dispersed into the polymer melt, the matrix resin is heated and sheared for the shortest time, and does not decompose, and the melting zone should preferably have an exhaust function. Ordinary single-screw extruders and twin-screw extruders can mix low-filling polymers, and special screw design and extruder combi...

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Abstract

The present invention is method of using steel slag as filler for plastic product. Steel slag is first iron eliminated and ground into powder, the steel slag powder is then mixed with plastic, including regenerated plastic, and the mixture is finally extruded in a screw extruder to form. The present invention has waste utilized to lower material cost, raise the heat resistance, mechanical strength and rigidity of material, reduce shrinkage of product and raise the size stability of product.

Description

technical field [0001] The invention relates to a method for using waste steel slag as a filler for plastic products. Background technique [0002] In plastic, rubber and other polymer material products, in order to reduce cost and improve performance, it is often necessary to add a certain amount of filler. These fillers are generally required to be low in price, low in relative density, easy to process, good in mixing performance with resin, large in filling capacity, and able to develop special effects of products, etc. Plastic materials can be divided into 18 categories of resins, more than 200 varieties, because the requirements of different uses require modification and composite materials, chemical modification methods and physical modification methods can be used for modified plastic materials, filling, reinforcement, and blending are commonly used methods of physical modification. [0003] Currently commonly used inorganic fillers include: mica powder, calcium car...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K11/00
Inventor 陈涛
Owner 陈涛
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