The glass fiber surface mat is an upgrade of the glass fiber mat according to the current state of the product after the use of the glass fiber products such as the glass fiber chopped strand mat plaid. Conventional chopped strand mat weight can be 100g to 900g, and the surface mat complements the chopped strand mat. The fiber filament is finer, shorter, lower in weight, thinner in thickness, and can be as low as 20g. From 20g to 100g of surface mat, it makes up for the shortcomings of chopped strand mat in some areas. Because the surface mat can effectively improve the appearance quality of FRP products, it is usually used in combination with other fiber products on the demanding FRP products.
The surface mat has a uniform fiber distribution, and the finished product has the characteristics of smooth surface, flatness, corrosion resistance, low adhesive content and good film mulchability, and is sought after by domestic and foreign customers.
The surface mat special production process determines that it has the characteristics of uniform surface fiber dispersion, good hand feeling, good gas permeability, strong resin penetration speed and the like. The surface mat is applied to FRP products. The good gas permeability makes the resin penetrate quickly and completely eliminates the phenomenon of bubbles and white stains. Its good embellishability is suitable for any complex shape products and molded surface, which can cover the cloth and improve the surface finish. Anti-leakage, while enhancing the interlaminar shear strength and surface toughness, improving the corrosion resistance and weather resistance of the product, is a necessary product for the manufacture of high quality FRP molds and products. Suitable for FRP hand lay-up.
The application of glass fiber in the construction field is mainly reflected in the exterior wall insulation and waterproofing, glass fiber reinforced cement and various building materials. Glass fiber is used in almost all types of exterior wall insulation systems. For example, the most widely used polystyrene and polyurethane sheets in foreign countries must be reinforced with glass fiber. This type of thermal insulation material has obvious safety and reliability, energy saving effect, long surface anti-seepage and anti-cracking effect, environmental protection and diversification of veneering practices. Glass wool can also be used directly as a wall insulation material.
Glass fiber reinforced cement is a composite material formed by using glass fiber as reinforcing material and cement paste or cement mortar as matrix. From the perspective of the development of the building materials industry, bulk building materials must be sustainable green materials. Cement and cement based materials are today's largest man-made materials. Therefore, both the world and China must rely on science and technology to save energy and protect the environment. Otherwise, cement and cement-based materials will become unsustainable materials. Cement-based materials must evolve toward high performance, working toward reducing usage, extending life, enhancing functionality, and especially reducing environmental costs. In addition, the application of FRP in the construction field includes lighting, sanitation, decoration, water supply and drainage, heating and ventilation, enclosing civil, electrical, tooling and so on. Building reinforcement and the application of FRP on bridges have become new concerns.
According to the “2014-2018 China Glass Fiber Industry Production and Sales Demand and Investment Forecast Analysis Report” published by Forward Industry Research Institute, the construction field is the largest application area in the glass fiber downstream application market. According to statistics, the demand for glass fiber in China's construction sector accounts for about 34% of the consumption of glass fiber products, and the ratio is calculated. In 2013, the application scale of glass fiber in China's construction sector was about 1.683 million tons, and the sales revenue reached 44.5 billion yuan. about.
Glass fiber is widely used in the construction industry. As can be seen from the following figure, there is a significant positive correlation between investment in construction industry and sales of glass fiber in this field, indicating that construction industry investment has a greater impact on glass fiber production.
From 2009 to 2013, China's urban construction industry investment grew at an average annual rate of 25%. Especially after China's 4 trillion economic stimulus plan was launched in 2009, the growth rate of construction industry investment increased sharply. The decline in China's macroeconomic growth rate in 2012-2013 is mainly due to the government's regulation of the real estate industry. Looking forward to the future, we are more optimistic about the investment growth rate of China's urban construction industry. It is expected that the average growth rate will remain between 20% and 25% in the next five years. Through the linear relationship between the sales revenue of the glass fiber industry and the investment in the urban construction industry, it can be seen that by 2018, the sales revenue of glass fiber in China's construction sector will increase to about 72.3 billion yuan, with an average annual growth rate of about 10%.
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