Fiber reinforced plastics is one of the most common reinforced plastics. Fiber reinforced plastics usually have the following characteristics.

High strength and high modulus

The quantity strength and modulus of fiber reinforced are obviously improved. Such as some general plastics after reinforcement, can also be used in engineering plastics; Some engineering plastics, through fiber reinforcement, its strength, modulus can be close to the strength of steel, and even some reinforced plastics, the specific strength, specific modulus is better than the general metal materials.

Good shock absorption

On the one hand, due to the viscoelastic properties of the plastic matrix, the viscoelastic internal friction inside the plastic matrix can dissipate the mechanical energy when it is subjected to external shock vibration or frequent mechanical waves such as mechanical vibration and acoustic vibration. On the other hand, because the interface between the fiber and the matrix in the reinforced material has good vibration absorption ability, the vibration damping is very high, and the early damage will not be caused by resonance.

Good fatigue resistance

The fatigue resistance of reinforced plastics is better than that of metals because the interface between fiber and matrix can prevent crack propagation.

Good overload safety

There are a large number of independent fibers in fiber-reinforced plastics. When a few fibers break due to overload, the load is quickly redistributed to the damaged fibers, so that the entire component does not lose its bearing capacity in the short term.

High heat resistance

Most unreinforced thermoplastics have low thermal deformation temperature and can only work in the temperature environment of 50~200℃ for a long time. For example, nylon 6, before reinforcement, its thermal deformation temperature is about 60℃, and after reinforcement, the thermal deformation temperature can be increased to more than 190℃.

The linear expansion coefficient is small

Due to the addition of fiber materials, the linear expansion coefficient of reinforced plastics is low, so the product molding shrinkage rate is small, which brings very favorable conditions for manufacturing products with relatively high dimensional accuracy requirements. But the molding shrinkage rate is directional, which should be fully considered in product design, mold design and manufacturing.

Good design of material properties

Through the selection of different resins, different reinforcement materials, different other components, and different composition ratios, a variety of property combinations of fiber-reinforced plastics can be achieved to adapt to the load distribution of different engineering structures.