How about the products made of FRP material?

FRP is a material made of glass fiber composite with one or several thermosetting or thermoplastic resins, such as phenolic resins, epoxy resins, polyester resins, polyimide resins, etc. FRP is a new type of composite material developed in the early 20th century, which has many advantages such as light weight, high strength, anti-corrosion, heat preservation, insulation, sound insulation and so on. The earliest composite material to appear was fiberglass, which has nothing to do with steel.

There is no iron in FRP at all, and it is not a composite of glass and steel.

The first FRP is a material made of glass fiber and phenolic resin. It is a liquid raw material that impregnates glass fiber with phenolic resin, is preformed by molding, and then cured by phenolic resin to make FRP. Corrosion-resistant and long-lasting.

FRP is a high-quality composite material. It has special anti-corrosion function for various corrosive media such as acid, alkali, salt, oil, etc., and will not corrode. The life span of ordinary PVC is 15 years, while the life span of FRP is 50 years.

FRP has the advantages of high strength, and the reasons are:

Ordinary glass is a brittle material with low strength, and if the molten glass is drawn into very fine glass fibers, its properties will change greatly. Fiberglass is soft and can even be woven into cloth. At the same time, the finer the fiberglass, the stronger it is.

The strength of FRP can be compared to reinforced concrete. In reinforced concrete, it is mainly the steel bar that bears the external force, but the concrete is indispensable, it bonds the steel bar into a whole, not only gives the building component a certain shape, but also increases the strength. In FRP, glass fiber acts like steel bar, while phenolic resin plays the role of concrete, and the combination of the two gives FRP amazing strength.

FRP not only has high strength, but also has excellent corrosion resistance, thus becoming an important corrosion-resistant material. Lead used to be a corrosion-resistant metal material, and it was resistant to the corrosion of sulfuric acid, which is highly corrosive. The reason is that lead and concentrated sulfuric acid react to produce insoluble lead sulfate, which becomes a dense protective film covering the surface of metallic lead, so the reactor and pipeline of chemical plants are often lined with lead, and enamel lining can also be used.

If FRP is used instead, the corrosion resistance meets the requirements. FRP is also used for valves, pumps, fans, suitable for transporting corrosive liquid car car and train tanker, in the chemical plant to make storage tank for corrosive liquid, waste acid and waste liquid pool village and large area of anti-corrosion ground. Petroleum is also very corrosive, FRP can be used instead of steel pipes to make oil pipelines, oil trucks, greatly saving steel.

The characteristics of FRP are mainly as follows:

Lightweight and strong. The relative density is between, only 1 4 1 5 of carbon steel, but the tensile strength is close to or even more than that of carbon steel, and the specific strength can be compared with high-grade alloy steel. As a result, it is highly effective in aviation, rockets, spacecraft, high-pressure vessels, and other applications that require weight reduction.

The tensile, flexural and compressive strength of some epoxy FRPs can reach more than 400MPa.

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

Good electrical performance. It is an excellent insulating material used to make insulators. It can still protect good dielectric properties at high frequencies.

Microwave transmission is good and has been widely used in radomes. Good thermal performance FRP thermal conductivity is low, at room temperature, only 1 100 1 1000 of metal, is an excellent thermal insulation material. In the case of instantaneous ultra-high temperature, it is an ideal thermal protection and ablation resistant material, which can protect the spacecraft from high-speed air flow above 2000.

Good designability.

1) Various structural products can be flexibly designed according to the needs to meet the requirements of use, and the products can have a good integrity. (2) Materials can be fully selected to meet the performance of the product, such as: corrosion resistance, instantaneous high temperature resistance, special high strength in a certain direction of the product, good dielectric, etc.

Excellent manufacturability.

1) The molding process can be flexibly selected according to the shape, technical requirements, use and quantity of the product. (2) The process is simple, can be molded at one time, and the economic effect is outstanding, especially for the products with complex shapes and small quantities that are not easy to form, and its process superiority is more prominent.

Shortcoming. Low modulus of elasticity.

The modulus of elasticity of FRP is twice as large as that of wood, but it is 10 times smaller than that of steel (e=, so it often feels that it lacks rigidity and is prone to deformation in the product structure. It can be made into a thin shell structure, a sandwich structure, or made up for by high-modulus fibers or stiffeners.

Poor long-term temperature resistance.

Generally, FRP can not be used for a long time at high temperatures, and the strength of general-purpose polyester FRP is significantly reduced above 50, and it is generally only used below 100; The general-purpose epoxy FRP is above 60, and the strength is significantly reduced. However, it is possible to choose a high-temperature resistant resin that makes long-term operating temperatures between 200 and 300 possible.

Aging phenomenon. Aging is a common defect of plastics, and FRP is no exception, which can easily lead to performance degradation under the action of ultraviolet rays, sand, rain and snow, chemical media, mechanical stress, etc.

Low shear strength.

The interlaminar shear strength is borne by the resin, so it is very low. The interlayer adhesion can be improved by selecting the process, using coupling agents, etc., and the most important thing is to avoid interlayer shearing as much as possible when designing the product.

If according to the material attribution of FRP, it should belong to the series of composite materials, because in the production process of FRP, glass fiber is mainly used.

In addition, some reinforcing materials are formed after merging, so Qi Ruhu is called FRP, which can also be called fiber reinforced plastic. The supplies included in the reinforcing materials are: felt, yarn, tape, glass cloth and other materials.

Second, what are the uses of FRP?

When it comes to the use of FRP, it is too many to count, because it can basically be applied to any field, including the construction field, chemical field, transportation field, aviation field, road field, electrical industry, communication engineering and so on.

1. In our daily life, there are many FRP materials that can be accessed, such as safety helmets can be seen on some accessories of motorcycles.

It is also possible to use FRP material, including some Huagao barrage pots are also made of FRP material, and even the shells of many household appliances are also made of FRP.

2. After the secondary processing of FRP, it can also be used in different environments and fields, such as the production of FRP as food cans, FRP pipes or FRP handicrafts and so on. Even in our bathroom, when doing construction, the roof plate used on the roof can also be based on FRP.

The raw materials of green light are hard plastics, light spheres and worn-out plastic materials.

01 FRP is a fiber-reinforced plastic composed of glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin matrix. FRP is a glass fiber reinforced material, which is a new type of composite material developed in the early 20th century. It has many advantages such as light weight, high strength, anti-corrosion, heat preservation, insulation, sound insulation, etc., and the early composite material is FRP, in fact, it has nothing to do with the material of steel.

There is no iron in FRP at all, and it is not a composite of glass and steel.

Fiberglass, also known as glass fiber reinforced plastic, refers to the reinforced plastic with glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin matrix, and glass fiber or its products as reinforcing materials. FRP has the characteristics of light and hard, non-conductive, stable performance, high mechanical strength, less utilization, corrosion resistance, etc., and can replace steel to make machine parts, automobiles, ship shells, etc.

The concept of composite materials refers to the fact that one material cannot meet the requirements of use, and needs to be compounded by two or more materials to form another material that can meet people's requirements, that is, composite materials. For example, a single glass fiber, although the strength is very high, but the fibers are loose, can only withstand tensile force, can not withstand bending, shear and compressive stress, and is not easy to make a fixed geometric shape, is a soft body. If they are bonded together with synthetic resins, they can be made into a variety of rigid products with fixed shapes, which can withstand both tensile stresses and bending, compression, and shear stresses.

This results in a glass-fiber-reinforced plastic matrix composite.

FRP is a composite material that has developed rapidly in the past 50 years. 70% of the production of fiberglass is used to make fiberglass. FRP has a high hardness and is much lighter than steel.

It is used as a fuel tank and pipe in jet aircraft, which can reduce the weight of the aircraft. The astronauts who landed on the moon carried miniature oxygen cylinders on their backs were also made of fiberglass. FRP is easy to process, stainless and rotten, and does not need to be painted.

China has widely used FRP to manufacture various small motorboats, lifeboats, yachts, and automobile manufacturing, saving a lot of steel.

Summary. Kiss.

1. Glass fiber, which is a kind of composite material, is usually used in aerospace, railway, construction, furniture, bathroom and other fields, and its strength is similar to that of high-grade alloys.

2. Epoxy resin, with its excellent viscosity and chemical resistance, is also a kind of polymer, and the process is flexible and can usually be made into coatings, adhesives, pouring substrates and so on.

3. Phenolic resin matrix, its heat resistance and burning resistance are excellent, and small molecules will be emitted when curing, which is generally used as a composite material.

What is the raw material of FRP?

1. Fiberglass is a type of composite material, which is usually used in aerospace, railway, construction, furniture, bathroom and other fields, and its strength is similar to that of high-grade alloys. 2. Epoxy resin, with its excellent viscosity and chemical resistance, is also a type of high-judge molecular polymer, and the process is flexible and can usually be made into coatings, adhesives, pouring substrates, etc. 3. Phenolic resin matrix, its heat resistance and burning resistance are excellent, and small molecules will be emitted when curing, which is generally used as composite materials.

FRP combines the advantages of glass and steel, its weight is not large, the density is normal, and it is one to one-fifth of the four things of carbon steel, and its tensile strength is about the same as carbon steel, and sometimes it is even better than carbon steel.

FRP is a fiber-reinforced plastic. FRP belongs to the composite material series, with glass fiber reinforced unsaturated polyester, epoxy resin and other materials as the matrix, plus some reinforcing materials, after merging and processing, reinforcing materials include glass cloth, felt, yarn, belt and other materials.

Composite materials generally refer to when a material cannot meet the requirements of use, it needs to be compounded by two or more materials to form another material that can meet people's requirements.

FRP can be divided into glass fiber reinforced composite plastics, carbon fiber reinforced composite plastics, boron fiber reinforced composite plastics and other types according to the different fibers used.

FRP has good thermal properties and manufacturability, and high strength, corrosion resistance, light weight, but long-term temperature resistance is relatively poor, can not be used at high temperature for a long time.

Glass fiber reinforced plastic (FRP), also known as GFRP, is a fiber-reinforced plastic, which generally refers to a matrix of glass fiber reinforced unsaturated polyester, epoxy resin and phenolic resin. Reinforced plastics with glass fiber or its products as reinforcing materials are called glass fiber reinforced plastics, or glass fiber reinforced plastics, which are different from tempered glass.

Due to the different types of resins used, there are polyester FRP, epoxy FRP, phenolic FRP. Light and hard, non-conductive, stable performance, high mechanical strength, less utilization, corrosion resistance. It can be used instead of steel to make machine parts and shells of automobiles and ships.

The scientific name of FRP is fiber reinforced plastics, commonly known as FRP (fiber reinforced plastics), that is, fiber reinforced composite plastics. According to the different fibers used, it is divided into glass fiber reinforced composite plastic (GFRP), carbon fiber reinforced composite plastic (CFRP), boron fiber reinforced composite plastic, etc. It is a composite material that uses glass fiber and its products (glass cloth, tape, felt, yarn, etc.) as the reinforcing material and synthetic resin as the matrix material.

Fiber-reinforced composites are composed of reinforcing fibers and a matrix.

The diameter of the fiber (or whisker) is very small, generally less than 10 m, the defects are few and small, and the breaking strain is about 30 parts per thousand, which is a brittle material, which is easy to be damaged, broken and corroded. Compared with fibers, the strength and modulus of the matrix are much lower, but it can withstand large strain, and often has viscoelastic and elastoplastic, which is a ductile material.