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2017年9月14日星期四

Environmental significance of composite refractory materials

The composite refractory material has been developed rapidly in recent years because of its high strength and low density, which is a kind of popular material instead of steel production. In particular, the technology of glass fiber reinforced composite refractory has been mature and In the automotive industry has been a lot of applications. However, the glass fiber is harmful to the human body and is easy to be bonded after melting, resulting in difficulty in recycling.

The natural fiber is recyclable, biodegradable, available, renewable, incineration when no toxic emissions, landfill biodegradable, and can be recycled; natural fiber can be used one-step molding, bonding with other materials Easy, the production process generally do not use adhesive. So natural fiber is environmentally friendly materials. Natural fiber in the energy advantage is also very obvious, such as Ma fiber growth period is short, the growth environment is not high, the growth process without pesticides and fertilizers. Natural fiber in the growth, harvest and processing of energy consumption less, the production process without "three wastes" pollution, the use of the process without harmful free chemical precipitation.



In addition, natural fiber composite refractories generally use polyester or polypropylene as the base resin, the use of wood fiber, hemp fiber and other natural fibers (straw, bamboo, sugar cane, coconut shell, etc.) as a reinforcing material. Substrate resin is cheap, fiber raw materials from a wide range of prices are also very low, so the natural fiber composite refractory materials have other composite materials can not match the price advantage. Moreover, the strength of natural fiber composite refractories is also higher than the glass fiber composite refractory, the use of natural fiber composite refractory instead of glass fiber composite refractory manufacturing auto parts can achieve 5% to 15% of the lightweight.

Now, the production of natural fiber composite refractory materials and products have been developed, because the use of direct extrusion injection molding process, so the composite material only experienced a heating process, which can reduce the natural fiber such heat sensitive materials heat degradation. Production of automotive exterior trims (including hoods, spoilers and fenders, etc.) is produced by on-line production using extrusion molding or extrusion molding.

In short, the natural fiber reinforced composite refractory material is a very promising environmentally friendly materials. According to expert evaluation, 5 years after its application will exceed the glass fiber.



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