Difference between FRP and KFRP
FRP, fiber-reinforced composite plastic, is the abbreviation of fiber reinforced polymer. FRP is often used as the central reinforcement of outdoor optical cable; nowadays, the use of leather cable is more and more extensive. In addition to FRP as the central reinforcement, the leather cable also uses KFRP as the central reinforcement. The difference between the two kinds of central reinforcement is as follows
FRP (glass fiber) has the following characteristics:
Light and high
The relative density is between 1.5 ~ 2.0, only 1 / 4 ~ 1 / 5 of carbon steel, but the tensile strength is close, even more than carbon steel, and the specific strength can be compared with high-grade alloy steel. Therefore, it is effective in aviation, rocket, spacecraft, high-pressure vessel and other products which need to reduce the self weight. The tensile, flexural and compressive strength of some epoxy FRP can reach above 400MPa.
(2) Good corrosion resistance
FRP is a good corrosion-resistant material, which has a good resistance to atmosphere, water, acid, alkali, salt and a variety of oils and solvents. It has been applied to all aspects of chemical anticorrosion and is replacing carbon steel, stainless steel, wood, non-ferrous metals, etc.
(3) Good electrical performance
It is a good insulating material, used to make insulator. Good dielectric property can be protected at high frequency. Microwave transmission is good and has been widely used in radome.
(4) Good thermal performance
FRP has low thermal conductivity, 1.25-1.67kj / (m · h · K) at room temperature, only 1 / 100-1 / 1000 of metal, so it is an excellent thermal insulation material. In the case of instantaneous high temperature, it is an ideal thermal protection and ablation resistant material, which can protect the spacecraft from the erosion of high-speed airflow above 2000 ℃.
(5) Good designability
① According to the needs, we can design all kinds of structural products flexibly to meet the use requirements, which can make the products have a good integrity.
② Materials can be fully selected to meet the performance of the product, such as: can be designed to be corrosion-resistant, instantaneous high temperature resistant, product in a direction of high strength, good dielectric, and so on.
(6) Excellent workmanship
① The molding process can be flexibly selected according to the shape, technical requirements, use and quantity of products.
② The process is simple, it can be formed in one time, the economic effect is outstanding, and the number of products with complex shape and difficult to form is small.
2. KFRP (polyester aramid fiber)
Kevlar fiber reinforced cable (KFRP) is a new type of high performance non-metallic fiber reinforced cable, which is widely used in access network.
Light weight and high strength: aramid fiber reinforced cable has low core density and high strength, and its specific strength and specific modulus are far higher than that of steel wire and glass fiber reinforced cable;
Low expansion: in a wide temperature range, the linear expansion coefficient of aramid fiber reinforced cable is smaller than that of steel wire and glass fiber reinforced cable;
Impact resistance and fracture resistance: the reinforced core of aramid fiber-reinforced optical cable not only has tensile strength (≥ 1700mpa), but also has impact resistance and fracture resistance. Even in the case of fracture, the tensile strength of 1300mpa can still be maintained;
Good flexibility: Aramid fiber-reinforced cable reinforced core texture soft, easy to bend, its small bending diameter is 24 times of the diameter. 5. Make the indoor optical cable compact, beautiful, excellent bending performance, suitable for wiring in complex indoor environment.
From the cost analysis, FRP cost is more advantageous.
The customer can determine which kind of central reinforcement to use according to the comprehensive consideration of specific use requirements and cost comparison.