What is the optimal length of glass fiber modified plastic?

With the continuous advancement of automobile lightweight, people are paying more attention to glass fiber reinforced modified plastics. Today, I will introduce to you the best length of glass fiber modified plastic.

The length of the glass fiber in the resin matrix is too short, it only serves as a filler, and does not enhance the effect (just the same effect as the cheap CaCO3, which will kill you); too long, although the enhancement effect is significant, it affects the glass Fiber dispersion in the resin matrix, molding processability, and product performance.

Therefore, it is generally believed that the ideal length of the glass fiber in the thermoplastic tree matrix should be 5 times its critical length. The critical length refers to the minimum length necessary for the stress of the glass fiber in a fiber-reinforced thermoplastic of a given diameter to reach its impact fracture stress value.

Because in glass fiber reinforced plastics, the length of glass fiber can transmit stress only when it reaches a certain length and act as a reinforcing material. Otherwise, it is high-grade CaCO3, so an optimal length is needed. However, even if the optimal length value is found, it cannot be 100% guaranteed that the effective length of the glass fiber in the product is this value, because the processing equipment and technology have a great influence on the final effective length of the glass fiber.