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Reinforcement effect of glass fiber on glass fiber reinforced plastic and nylon

 
一、What is glass fiber reinforced plastic?

  Glass fiber reinforced plastics are a wide variety of composite materials with different properties and wide applications. It is a new functional material made of synthetic resin and fiberglass composite material through a composite process.
The characteristics of glass fiber reinforced plastics:

(1)Good corrosion resistance: FRP is a good corrosion-resistant material. It has good resistance to the atmosphere; water and general concentrations of acid and alkali; salt, various oils and solvents, and has been widely used in chemical anti-corrosion. of all aspects. It is replacing carbon steel; stainless steel; wood; non-ferrous metals and other materials.

  (2)Light weight and high strength: The relative density of FRP is between 1.5 and 2.0, which is only 1/4 to 1/5 of that of carbon steel, but the tensile strength is close to or even higher than that of carbon steel, and the strength can be compared with high-grade alloy steel. , are widely used in aerospace; high-pressure containers and other products that need to reduce their own weight.

  (3)Good electrical properties: FRP is an excellent insulating material, used to make insulators, and can still maintain good performance at high frequencies.

  (4)Good thermal performance: FRP has low electrical conductivity, 1.25~1.67KJ at room temperature, only 1/100~1/1000 of metal is an excellent thermal insulation material. Ideal for thermal protection and ablation resistance under transient high heat conditions.

  (5)Excellent process performance: the molding process can be selected according to the shape of the product, and the process is simple and can be molded at one time.

  (6)Good designability: materials can be fully selected according to needs to meet the requirements of product performance and structure.

  (7)Low elastic modulus: The elastic modulus of FRP is 2 times larger than that of wood but 10 times smaller than that of steel, so it is often felt that the rigidity is insufficient in the product structure and is easily deformed. The solution can be made into a thin shell structure; the sandwich structure can also be made up in the form of high modulus fibers or reinforcing ribs.

  (8)Poor long-term temperature resistance: Generally, FRP cannot be used for a long time at high temperature, and the strength of FRP of general-purpose polyester resin will decrease significantly when it is above 50 degrees.

  (9)Aging phenomenon: under the action of ultraviolet rays; wind, sand, rain and snow; chemical media; mechanical stress, etc., it is easy to cause performance degradation.

  (10)Low interlaminar shear strength: The interlaminar shear strength is borne by the resin, so it is low. The interlayer adhesion can be improved by selecting a process, using a coupling agent, etc., and try to avoid interlayer shearing during product design.