Application of the hottest resin composite

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Application of resin based composites

Application of resin based composites in the construction industry

the construction industry plays a very important role in the national economy. No matter which country, the construction industry is one of the pillar industries of the national economy. With the progress of society, people put forward higher and higher requirements for living area, housing quality and entertainment facilities, which is the driving force to promote the reform and development of the construction industry

the development direction of the modernization of construction industry is to improve construction conditions, speed up construction progress, reduce costs, improve quality, save energy, reduce transportation, protect cultivated land, protect the environment and improve technical and economic benefits. In order to achieve this goal, we must improve the existing building materials and develop new building materials

the development and use of resin matrix composites in the construction industry are very beneficial to reduce the self weight of buildings, improve the use function of buildings, reform the architectural design, accelerate the construction progress, reduce the project cost, and improve economic benefits. It is a necessary condition for the modernization of the construction industry

1. Architectural properties of resin matrix composites

(1) designability of material properties the properties of resin matrix composites can be designed according to the use requirements. If water resistance, corrosion resistance and high strength are required, resin matrix composites can be selected. Due to the light weight and convenient manufacture of resin matrix composites, it can be manufactured at one time for large-scale structural and complex architectural products, so as to improve the integrity of the architectural structure

(2) good mechanical properties. The mechanical properties of resin matrix composites can be designed in a wide range. Due to the different materials selected and the different laying directions and directions of reinforcement materials, composites with great performance discrimination can be obtained. For example, the tensile strength of unidirectional glass fiber reinforced epoxy composites can reach more than 1000MPa, which is higher than that of steel (building steel). Carbon fiber is selected as reinforcement, The elastic modulus of the prepared resin matrix composite can reach the level of building steel, but its density is 4 ~ 5 times smaller than that of steel. What is more prominent is that during the manufacturing process, resin matrix composites can be locally strengthened according to the stress status of components, which can not only improve the bearing capacity of the structure, but also save materials and reduce self weight

(3) good decorative. The surface of resin matrix composites is bright and clean, which can be prepared into various bright colors, and can also produce different patterns and patterns. It is suitable for manufacturing various decorative panels, large relief and arts and crafts sculptures

(4) light transmittance transparent glass fiber reinforced plastic has a light transmittance of more than 85% (similar to glass), which is not easy to break and can bear loads. When used in construction projects, the structure, enclosure and lighting can be designed comprehensively, which can simplify the lighting design and reduce the project cost

(5) the function of thermal insulation buildings is to prevent temperature changes caused by heat conduction and convection, and provide people with a good working and resting environment. The thermal insulation performance of general building materials is poor. For example, the thermal conductivity of ordinary concrete is 1.5 ~ 2.1W (M? K), the thermal conductivity of red brick is 0.81 w (M? K), and the thermal conductivity of sandwich structure of resin matrix composite is 0.05 ~ 0.08 w (M? K), which is 10 times smaller than ordinary red brick and more than 20 times smaller than concrete

(6) soundproofness soundproofing effect is one of the standards to evaluate the quality of buildings. However, among the traditional materials, the building materials with good sound insulation effect tend to have high density, poor heat insulation, and difficult transportation and installation. Although the sound insulation performance of resin matrix composites is not very ideal, it can dissipate vibration sound waves and spread sound waves. The specially designed sandwich structure can achieve the double-layer effect of sound insulation and heat insulation

(7) electrical performance FRP has good insulation performance. It is not affected by electromagnetic waves and does not reflect radio waves. Through the design, it can have good microwave transmission performance in a wide frequency band, and has special uses for buildings of electric communication systems, such as the manufacture of radar radomes and various machine rooms

(8) chemical corrosion resistant FRP has good anti microbial effect and resistance to acid, alkali, organic solvents and seawater corrosion. It is especially suitable for chemical construction, underground construction, hydraulic construction and other projects

(9) water permeability and water absorption FRP has low moisture absorption and is impermeable. It can be used in waterproof, water supply and drainage projects in construction projects

2. Application of resin matrix composites for construction

with the rapid development of the construction industry, composites are increasingly used in Construction Engineering:

(1) composite building products used as load-bearing structures include columns, trusses, beams, foundations, load-bearing folded plates, roof panels, floors, etc. these composite components are mainly used in the load-bearing structures of chemical corrosion plants Large plate structure of high-rise buildings and all FRP composite buildings. The new method obviously needs to first produce C-shaped frame through other processes

(2) enclosure structure composite enclosure structure products include various corrugated plates, sandwich structural plates, various composite plates of different materials, integral and assembled folded plate structures and shell structures. As a plate of shell structure, it is both an enclosure structure and a load-bearing structure. These components can be used as assembly components of exterior wall panels, partition boards, anti-corrosion floors, roof structures, sun visors, ceilings, thin shell structures and folded plate structures of industrial and civil buildings

(3) lighting products light transmission building products include transparent corrugated plates, translucent sandwich structural plates, integral and assembled lighting covers, etc., which are mainly used for skylights, roofs and surrounding walls of industrial plants, civil buildings, agricultural greenhouses and large public buildings

(4) door and window decorative materials belong to this kind of material products, including door and window cross-section composite pultrusion profiles, flat plates, embossed plates, composite plates, etc. generally, the window frame profiles are made of resin FRP. Composite doors and windows are waterproof, heat insulated and chemical resistant. It is used in industrial and civil buildings, and decorative panels are used as dados, ceilings, large reliefs, etc

(5) water supply and drainage engineering materials in municipal construction, a large number of composite materials have been used in water supply, drainage and sewage treatment projects, such as various specifications of water supply fiberglass pipes, high-level water tanks, septic tanks, anti-corrosion sewage pipes, etc

(6) sanitary ware materials belong to such products as bathtubs, washbasins, bedpans, and various integral and assembled toilets, which are widely used in sanitary engineering and various toilets of various buildings

(7) heating and ventilation materials are such composite products, including cooling towers, pipes, plates, grids, fans, blades and integrally formed heating and ventilation products. Ventilation kitchen, air supply pipe, exhaust pipe, anti-corrosion fan cover, etc. in the central air-conditioning system applied in engineering

(8) roof buildings of high-rise buildings, such as revolving restaurant roof, special-shaped spire decorative roof, building heightening, spherical roof, roof garden, roof swimming pool, billboards and advertising materials

(9) special buildings, large-span aircraft hangars, refrigerators of various sizes, mobile houses, sentry boxes, antique buildings, mobile theatres, microwave towers, shielding rooms, anti-corrosion workshops, hydraulic buildings, breakwaters, solar houses, inflatable buildings, etc

(10) there are many other uses of other composite materials in buildings, such as various furniture, manhole covers on the road, park and playground seats, bathing beach changing rooms, park antique pavilions, etc

application of resin matrix composites in the chemical industry

the composite based on resin has been used as a corrosion-resistant material in the chemical industry for more than 50 years. Due to its high specific strength, no electrochemical corrosion, low thermal conductivity, good thermal insulation and electrical insulation, smooth inner wall of products, low fluid resistance, convenient maintenance, light weight, convenient hoisting and transportation, resin matrix composites have been widely used in petroleum Chemical fertilizer, salt making, pharmaceutical, papermaking, seawater desalination, bioengineering, environmental engineering, metal electroplating and other industries

1. Application in the field of environmental protection

with the development of industry, environmental pollution has become one of the issues of concern in the world today. Many countries have invested huge human and material resources in the emerging industrial sector of environmental protection industry

FRP has been widely used in water supply and drainage pipeline engineering. In recent years, more and more pipelines of wastewater treatment systems are made of FRP. One basic reason is that the types and corrosion properties of corrosion-resistant media of wastewater are increasing, which requires the use of materials with better corrosion resistance, and corrosion-resistant FRP is the best material to meet this demand

the applications of composite materials in environmental protection include general industrial waste gas treatment, oil and water treatment, toxic waste water treatment, waste incineration treatment and municipal wastewater deodorization treatment

2. Application in the field of high purity water and food

this is a new field of application of resin matrix composites. The excellent corrosion resistance of resin matrix composites means that this material has the characteristics of liveliness and non pollution, and naturally becomes an optional material for highly clean items such as storing high-purity water, drugs, wine, milk and so on

3. Application in chlor alkali industry

chlor alkali industry is one of the earliest application fields of FRP as corrosion-resistant materials. At present, FRP has become the main material in chlor alkali industry. FRP has been used in various pipeline systems, gas blowers, heat exchanger shells, brine tanks, pumps, pools, floors, wallboards, gratings, handles, railings and other building structures. At the same time, FRP also began to enter all fields of the chemical industry

4. Application in the paper industry

the paper industry takes wood as raw material, and acid, salt, bleach, etc. are needed in the paper making process, which has a strong corrosive effect on metals. Only FRP materials can resist such harsh environment. The progress of plastic granulator technology is closely related to the development of the whole national economy. FRP materials have shown their excellent corrosion resistance in the pulp production of some countries

5. Application in metal surface treatment industry

most of the acids used in metal surface treatment plants are hydrochloric acid, and there is basically no problem using FRP

6. Thermal power generation

thermal power generation is dominated by combustion and fuel oil. FRP products can be used for general pipelines or waste water treatment facilities in power plants, and smoke exhaust and desulfurization devices are the focus of corrosion prevention

7. Seawater desalination

seawater desalination is divided into traditional distillation and reverse osmosis membrane methods. Because seawater is very easy to erode ferrous materials, most pipelines and containers in the desalination plant use FRP products

8. Applications in hot springs

hot springs are used for power generation and bathing. From the extraction to transportation of hot springs, glass fiber reinforced plastic pipes have been widely used

9. In the pharmaceutical industry, there are many kinds of drugs, and each raw material is different, but FRP is favored for the pharmaceutical industry

10. Transportation use

the use of FRP on tank cars has been proved to be more practical than rubber lining. For example, in the transportation of hydrochloric acid, rubber lining has been proved to be perforated due to sediment, which is the basic problem of hydrochloric acid, unless it is pure hydrochloric acid at 100 ℃. From many examples, it has been proved that vinyl resin is a correct choice to make tank body or lining. This is because vinyl resin has

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