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Environmental protection significance of natural fiber reinforced composite refractories

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Zhengzhou huixinlong refractory
Release time:
2020/03/30 11:16
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Environmental protection significance of natural fiber reinforced composite refractories
Composite refractories have become a hot alternative to steel production because of their high strength, low density and designability. In recent years, composite refractories have developed rapidly, especially the technology of glass fiber reinforced composite refractories has been relatively mature and has been widely used in the automobile industry. However, glass fiber is harmful to human body, and easy to bond after melting, which makes recycling difficult.
However, the natural fiber is recyclable, degradable, recyclable and renewable. There is no toxic emission when burning, and it can be biodegraded and recycled after landfilling. The natural fiber can be formed by one-step method, which is easy to bond with other materials, and generally no adhesive is used in the production process. So natural fiber is environmental protection material. The advantages of natural fiber in energy saving are also very obvious, such as the short growth period of hemp fiber, low requirements for the growth environment, and no need of pesticides and chemical fertilizers in the growth process. The energy consumption of natural fiber in the process of growth, harvest and processing is less, there is no pollution of "three wastes" in the production process, and there is no harmful free chemical substances in the use process.
In addition, polyester or polypropylene is generally used as matrix resin for natural fiber composite refractories, and wood fiber, hemp fiber and other natural fibers (straw, bamboo, sugarcane, coconut shell, etc.) are used as reinforcement materials. Because of the low price of matrix resin, the wide source and low price of fiber raw materials, natural fiber composite refractories have the price advantage that other composite materials can't match. In addition, the strength of natural fiber composite refractories is higher than that of glass fiber composite refractories. Using natural fiber composite refractories instead of glass fiber composite refractories to make auto parts can achieve 5% ~ 15% lightweight.
Now, the on-line production of natural fiber composite refractories and products has been developed, because the direct extrusion molding process is used, so the composite only experienced a heating process, which can reduce the thermal degradation of natural fiber such as heat sensitive materials. Through on-line production, using extrusion molding or injection molding process to produce automobile exterior decoration parts (including engine hood, spoiler, fender, etc.).
In a word, the natural fiber reinforced composite refractories are a kind of environmental protection materials with great development prospect. According to experts' assessment, its application will surpass that of fiberglass in five years.