Introduction and application of FRP

FRP

FRP (FRP), also known as GFRP, is fiber reinforced plastic. It generally refers to glass fiber reinforced plastic made of rubber coat, unsaturated resin and alkali-free glass fiber. It is a composite material that uses glass fibers and their products (glass cloth, felt, yarn, etc.) as reinforcement materials and synthetic resin as matrix materials. Fiber-reinforced composites are composed of reinforced fibers and a matrix. The diameter of fibers (or whiskers) is very small, generally below 10μm, with fewer defects and smaller fracture strains, which are brittle materials, which are prone to damage, fracture and corrosion. Compared with fibers, the strength and modulus of the matrix are much lower, but it can withstand large strains and is often viscoelastic and elastic-plastic, and is a tough material.

As a new composite material, fiberglass reinforced plastic has extremely superior physical properties.

1. Lightweight and high-strength

The relative density is between 1.5 and 2.0, only 1/4 to 1/5 of carbon steel, but the tensile strength is close to that of carbon steel, and the tensile, bending and compressive strength of the specially made high-strength FRP can reach more than 400Mpa.

2. Corrosion resistance, wear resistance

FRP is a good corrosion-resistant material and has good resistance to atmospheric, water and general concentrations of acids, alkalis, salts, and a variety of oils and solvents. It has been applied to all aspects of chemical corrosion protection and is replacing traditional carbon steel, stainless steel, wood, non-ferrous metals, etc.

3. Good electrical performance

FRP is a reinforced plastic and an excellent insulating material used to make insulators. It can still protect well at high frequency

Electricity. The microwave transmittance is good and has been widely used in radar radomes.

4. Good thermal performance

FRP has low thermal conductivity, at room temperature of 1.25~1.67kJ/(m·h·K), only 1/100~1/1000 of metal, making it an excellent thermal insulation material. It does not cause deformation and fission at ultra-high temperatures and ultra-low temperatures. It is an ideal thermal protection and ablation-resistant material under instantaneous ultra-high temperatures.

5. Excellent water resistance

Good mechanical properties and dimensional stability can be maintained under long-term immersion of high-temperature steam and hot water.

6. Easy to clean and easy to install

The surface of the fiberglass is made of high-quality rubber coat, with smooth surface and low texture, which can easily remove stains, which is conducive to the daily cleaning and maintenance of the product.

The production of fiberglass is mainly hand paste. Through manual operation, the shape of the product can be designed, with simple equipment and low cost; the product extrusion molding of machine is single, and the production of assembly lines greatly improves efficiency. With the inability to research and development of fiberglass products, the use of fiberglass is now involved in many fields.

1. Construction industry: industrial cooling towers, fiberglass doors and windows, building structures, enclosure structures, indoor equipment and decorative parts, fiberglass flat panels, corrugated tiles, decorative panels, fiberglass covers, sanitary ware and integrated bathrooms, saunas, surf bathrooms, construction formwork, storage ware, etc.
2. Chemical and chemical industry: corrosion-resistant pipelines, storage tanks, corrosion-resistant conveying pumps and their accessories, corrosion-resistant valves, grilles, ventilation facilities, sewage and wastewater treatment equipment and accessories, etc.
3. Automobile and railway transportation industry: automobile shells and other components (refrigerated trucks, RVs and dry trucks, etc.), all-plastic micro-cars, large passenger cars, car body shells, doors, inner plates, main columns, floors, bottom beams, bumpers, instrument screens, small passenger and vans, as well as fire tankers, refrigerated trucks, tractors and cabs and machine covers, etc.
4. In terms of railway transportation, there are train window frames, roof bends, roof water tanks, toilet floors, luggage car doors, roof ventilators, refrigerated doors, water storage tanks, and some railway communication facilities.
5. In terms of highway construction, there are traffic signs, isolation piers, sign piles, signs, road guardrails, etc., in the boat and water transportation industries.
6. Inland passenger and cargo ships, fishing boats, hovercrafts, various yachts, racing boats, high-speed boats, lifeboats, transportation boats, as well as fiberglass navigation beacon float drums and buoys, etc.
7. Electrical industry and communication engineering: There are arc extinguishing equipment, cable protection pipes, generator stator coils and support rings and conical shells, insulated pipes, insulated rods, motor guard rings, high-voltage insulators, standard capacitor shells, motor cooling casings, generator windshields and other strong electrical equipment; distribution boxes and distribution boards, insulated shafts, fiberglass covers and other electrical equipment; printed circuit boards, antennas, radar covers and other electronic engineering applications.

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