Disadvantages of Fiberglass:
1. Low modulus of elasticity
The elastic modulus of Fiberglass is twice as large as that of wood, but 10 times smaller than that of steel (E = 2.1 × 105). Therefore, it is often felt that the rigidity of the product structure is insufficient and it is easy to deform.
It can be made into a thin shell structure, a sandwich structure, or it can be made up by high modulus fibers or reinforcing ribs.
2. Poor long-term temperature resistance
Generally, Fiberglass cannot be used for a long time at high temperature. The strength of general-purpose polyester Fiberglass decreases significantly above 50 ° C, and it is generally only used below 100 ° C. The general-purpose epoxy Fiberglass has a significant decrease in strength above 60 ° C. However, it is possible to choose a high-temperature-resistant resin so that a long-term working temperature of 200 to 300 ° C is possible.
3. Aging phenomenon
Aging is a common defect of plastics, and Fiberglass is no exception. It is easy to cause performance degradation under the action of ultraviolet rays, wind, sand, rain, snow, chemical media, and mechanical stress.
4.Low shear strength
The interlayer shear strength is borne by the resin, so it is very low. You can improve the adhesion between layers by selecting processes and using coupling agents. The main thing is to avoid shearing between layers as much as possible during product design.