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What is FRP pultruded profile?
PUBTIME:
2025-02-24 10:02:20
The basic components of pultruded FRP profiles are resin and glass fiber (including cloth, felt, etc.), which are reinforced by fiber (including glass fiber, carbon fiber, organic fiber and other metal and nonmetal fibers) and resin (mainly epoxy resin). Polyester resin, phenolic resin) as adhesive, supplemented by other auxiliary materials (main auxiliary materials: mold release agent, curing agent, catalyst, mold sealing agent, UV light stabilizer, mold cleaning water, gel coat, etc.). It has a series of excellent characteristics such as high temperature resistance, corrosion resistance, high strength, small specific gravity, low moisture absorption, small extension and good insulation. It has the advantages of high temperature resistance, corrosion resistance, high strength,
The basic components of pultruded FRP profiles are resin and glass fiber (including cloth, felt, etc.), which are reinforced by fiber (including glass fiber, carbon fiber, organic fiber and other metal and nonmetal fibers) and resin (mainly epoxy resin). Polyester resin, phenolic resin) as adhesive, supplemented by other auxiliary materials (main auxiliary materials: mold release agent, curing agent, catalyst, mold sealing agent, UV light stabilizer, mold cleaning water, gel coat, etc.). It has a series of excellent characteristics such as high temperature resistance, corrosion resistance, high strength, small specific gravity, low moisture absorption, small extension and good insulation. It has a series of excellent characteristics such as high temperature resistance, corrosion resistance, high strength, small specific gravity, low moisture absorption, small extension and good insulation. A series of excellent characteristics such as small extension and good insulation.
Application of pultruded profiles;
High-voltage cable bridge, insulating support member, antenna column, high-voltage power supply operating rod, generator radiator, stairs and handrails, operating platform, aisle, oil storage tank, power distribution board and room, drainage system, berth and seabed identification sign, working strut in train and automobile, corner board, highway guardrail, sound absorption board, filler support in tower, filter plate bracket and frame material of cold storage.
Characteristics and performance
1. Good dimensional stability
The thermosetting resin matrix is crosslinked by heating during processing to form a body-shaped network structure, and its products have good dimensional stability under normal conditions and small post-shrinkage after molding. The shape and size of the product change little under long-term continuous load, that is, the creep property is small. Its creep performance depends on the load, temperature and loading time. Under the condition of fixed load and temperature, the creep of thermosetting plastics after long-term loading is much smaller than that of thermoplastic plastics. The creep of thermosetting plastics after long-term loading is much smaller than that of thermoplastics.
2. Excellent heat resistance and high temperature resistance.
Thermosetting resin-based composites can no longer be softened after curing, and their products are quite stable in heat resistance. Measured by a load of 1.86MPa, their thermal deformation temperature is generally within 150 ~ 260℃, while fiber-reinforced thermosetting plastics are excellent thermal insulation materials, and their thermal conductivity is generally 0.35 ~ 0.47 w/(m k), which is only 1/100 to 1/1000 of that of metals, so they can be used as good insulation materials. Glass fiber/phenolic resin is an excellent thermal insulation material for rocket and missile engines.
3. Excellent electrical performance
Composite materials are excellent electrical insulating materials. If mica is used as filler, the products have better electrical properties, which can be used to manufacture special parts with excellent arc resistance, voltage resistance and induced electricity. Because the composite material has excellent electrical properties, its products have no electrochemical corrosion and stray current corrosion, and can be widely used to manufacture insulating parts in instruments, motors and electrical appliances, so as to improve the reliability of electrical equipment and prolong its service life. In addition, the products have good dielectric properties and microwave permeability under the action of high frequency, and have been used to manufacture a variety of high-frequency insulation products such as radomes.
4. Corrosion resistance
The electrochemical corrosion mechanism of resin-based composites is different from that of ordinary steel, because it is non-conductive and does not dissolve ions in dielectric solution, so it has good chemical stability to the atmosphere, water, acid, alkali, salt and other media with general concentration, especially in non-oxidizing strong acids and media with a wide ph range. Therefore, at present, it is widely used in the manufacture of corrosion-resistant products, which has played a good role in the corrosion of some media (such as hydrochloric acid, chlorine, carbon dioxide, dilute sulfuric acid, sodium hypochlorite and sulfur dioxide) that stainless steel can't cope with.
5. Good surface characteristics of FRP pultruded profiles.
When composite materials contact with chemical media, there is little corrosion and scaling on the surface, so they are often used to make fluid pipelines, which have small internal resistance and low friction coefficient, saving a lot of power. Because composite materials are generally not as easy to produce metal ions to pollute the medium as metals, this is also the reason why composite products are widely used in food and hospital industries.
The above superior characteristics of pultruded composite materials are mostly used in mechanical structural parts, insulation parts, high-frequency stress parts and other functional structural parts.
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