FRP material

   FRP is the abbreviation for Fiber Reinforced Plastics. FRP began in the 20th century forties, China started to research from the 1958,now has been widely used in many areas of the national economy. FRP has many outstanding features:

   1¡¢Lightweight high-strength, specific gravity between 1.5 to 2.0, only the carbon steel 1 / 4 to 1 / 5, but the tensile strength could be closer to more than its steel, while the strength (strength of the material divided by the density value) can compared to high-alloy steel. Therefore, in aviation, rocket, spacecraft and other high-pressure vessel, and other need to reduce the weight of the product applications, has obvious advantages.

    2¡¢Chemical rot touch: FRP is a good corrosion-resistant materials, in general the concentration of acid, alkali, salt, a variety of oils and organic solvents, water has a better resistance to diseases. Now has been widely applied to chemical corrosion in many areas and made significant economic benefits. It is replaced by carbon steel, stainless steel, wood, non-ferrous metals.

   3¡¢Good electrical properties: FRP insulation properties (surface resistance, volume resistivity, breakdown voltage, etc.) was higher, and can be made into anti-static or conductive material. At high frequencies to maintain good dielectric properties, free from electromagnetic effects, does not reflect electromagnetic waves, through microwaves.

    4¡¢Instantaneous super-high temperature-resistant: Some FRP material capability of more than 3800 ¡æ instantaneous ultra high temperature shell and become a rocket into space, nose cone, nozzle ablative materials, such as the only option. FRP with low thermal conductivity at room temperature for 0.3 ~ 0.4 kcal / m • When • degrees, only the metal 1 / 100 ~ 1 / 1000, is an excellent insulation material.

    5¡¢No notch sensitivity: Fiber composite materials have a large number of independent fibers per square centimeter at the root of the fiber from several thousand to as many as tens of thousands of roots, From the mechanical point of view is typical of statically indeterminate system, and will not be like glass, metal, as a "notch sensitivity" (there is a rapid expansion of breakage), Even a small amount of fiber fracture component overloading, load quickly redistributed without the destruction of fiber.

    6¡¢Good Anti-fatigue performance: Fatigue damage is material in alternating loads, due to the formation and expansion of micro-cracks caused by low stress damage.

    7¡¢Can be prepared a transparent and multi-color products.

    8¡¢Design adaptability, molding character and Vietnam: FRP is a material, but also a structure that can use different materials and molding process to maximize the different products to meet different requirements.

Any product is divided into two, FRP is not a panacea, it also has shortcomings:

    1¡¢Low modulus of elasticity, FRP elastic modulus ratio of timber twice as large, but 10 times smaller than steel, so a sense of rigidity in the product structure, frequently inadequate, easy to deform.. FRP can be made into shell structures, sandwich structure, or by adding high-modulus carbon fiber to increase the rigidity FRP.

    2¡¢The long-term heat resistance is low, usually only at 100 ¡æ for the following long-term use, but through the use of high-performance resin, will bring the temperature rises to 200 ~ 300 ¡æ.

    3¡¢The existence of aging: antioxidant additive, surface coating, etc. to improve the situation.

    4¡¢Poor wear resistance: can be added to improve the wear-resistant materials, such as silicon carbide.

 

Note: FRP products and semi-finished products: 1, SMC modular water tanks; 2, SMC insulating parts; 3, the other SMC components (such as meter boxes, long-horned wood, short Angles, arc boards, power connectors, insulation sleeve, etc.); , various phenolic, epoxy-phenolic glass cloth insulation board; 5, Molding Compound, SMC material, BMC / DMC.

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