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FRP Reinforcing Pultruded Profiles Epoxy Fiberglass Flat Bar Fiberglass Flat Sheet Introduction FRP Flat sheet can be manufactured by pultrusion technique,SMC,continous forming and hand lay-up method. Different technique has different advantage &disvantage. Pls see below form. Item Pultrusion SMC Continuous Forming Hand Lay-Up Length No Length Limit,as long as the container can fit. ≤3600mm No Length limit,it can be rolled Customized Thickness 2-10mm 2-100mm 0.8-3.5mm Customized Width ≤2400mm ≤2400 ≤2400mm Customized Mould fee Yes Yes NO Yes Production Efficiency C B A D Application Floor,Bridge Panel,etc Electric Cabinet ,etc window,truck panel skin,etc Bridge and Wall Decorative ,etc Main Features 1) Skillful manufacturing 2) Modern design 3) Corrosion resistance 4) Light weight 5) High intensity 6) Aging resistance 7) Excellent dimension stability 8) Long service life 9) Smooth surface 10) Good flexibility 11) Manufactured using synthetic resin and reinforced with glass fiber. Properties 1. Excellent specific modulus and strength. 2. Good insulation properties. 3. Good water resistance and good fire resistance. It is widely used in marine, wind energy, sports, railway and aerospace industries. Tensile Modulus(Mpa) 75 95 130 175 250 320 Compressive Strength(Mpa) 0.9 1.4 2.0 3.0 4.8 6.2 Compressive Modulus(Mpa) 72 90 135 170 240 300 Shear Strength(Mpa) 0.76 1.15 1.6 2.2 3.5 4.5 Shear Mpdulus(Mpa) 20 27 35 50 85 104 Shear Strain(%) 20 30 40 40 40 40 Technical data Item P60 P80 P100 P130 P200 P250 Density ( kg/m3) 60 80 100 130 200 250 Tensile Strength(Mpa) 1.8 2.5 3.5 4.8 7.1 9.2 Tensile Modulus(Mpa) 75 95 130 175 250 320 Compressive Strength(Mpa) 0.9 1.4 2.0 3.0 4.8 6.2 Compressive Modulus(Mpa) 72 90 135 170 240 300 Shear Strength(Mpa) 0.76 1.15 1.6 2.2 3.5 4.5 Shear Mpdulus(Mpa) 20 27 35 50 85 104 Shear Strain(%) 20 30 40 40 40 40 Applications Wind energy: rotor blades, nacelles Marine: hulls, decks, bulkheads, superstructures, interiors. Our company is professional in producing FRP profiles, which have been exported to many abroad countries. Feel free to contact us for more information.

Fiberglass Pultrusion Profiles For the Construction Industry An increasing number of architects, engineers and builders are using fiberglass pultrusion for a variety of building and infrastructure projects and the trend is accelerating thanks to the many benefits delivered by the technology. Pultrusion is a process for producing linear fiber-reinforced plastic (FRP) composite profiles with a uniform cross-section. The pultrusion machine reinforces the fiber by impregnating them in a resin bath and then pulls it through a heated die in which the curing occurs. The finished profiles can be of virtually any cross-sectional shape (e.g., tubes, rods, I-beams, T-, U- and Z-profiles) that are either solid or hollow, then be cut to the desired length. The manufacturing process is highly automated, making pultrusion a fast and efficient method for producing high-performance building parts of various shapes and sizes that allow for much design freedom. Benefits Of Using Pultruded Fiberglass In Building and Construction DONGDING offers a flexible and scalable solution for creating items such as profiles or reinforcements for windows, doors, and frames, pipe and electrical supports, as well as roll-up door panels. Here are some key advantages of using pultruded fiberglass profiles in construction: ● The pultrusion process allows for rapid, cost-effective, and high-volume manufacturing of structural components that are strong, durable, and lightweight. In addition, you can accurately-control the resin content to adjust the properties and load-bearing capacity of the end products. ● Components of various characteristics can be created by using a range of reinforcing fibers and formats, such as glass or carbon fiber and thermoset matrix resins (e.g., polyester, vinylester, epoxy, phenolic, polyurethane, and thermoplastic resins.) ● Pigments can be added during the pultrusion process to create fiberglass profiles of any color, eliminating the time and cost required for painting. Surfacing veils can also be used to create appearances such as wood grain, marble, and granite to meet different design needs. ● The corrosion-resistant properties of composite materials provide a durable and low maintenance solution for products that are exposed to the weather. For example, pultruded roof trim, fascia, and soffit are lightweight and easy to install. ● A durable UV-resistant coating can be applied to pultruded fiberglass profiles for outdoor use to increase the durability of the components cost-effectively. ● Fiberglass profiles are easy to manipulate without the need for specialized tools. For example, they can be painted, cut or drilled using conventional hardened tools, and connected using bolts, screws, rivets, or adhesives at the construction sites. ● The pultrusion process offers virtually endless options for customization to meet various structural and design requirements. ● Pultruded profiles can be as much as 75% lighter than their steel counterparts without sacrificing structural strength. ● Fiberglass profiles are effective thermal breaks that prevent thermal bridging, which is a common challenge for steel and concrete and impacts a building's energy performance. Pultruded composites can effectively reduce heat conduction and therefore energy consumption of a building while preventing the formation of surface condensation. ● Transportation of the lightweight pultruded components is easy and inexpensive, which helps lower the overall cost of a building project. ● Glass fiber reinforced plastic (GRP) rebars can maintain their micro-structural integrity and mechanical properties for more than 15 years with very low maintenance requirements. The high durability enhances long-term performance while lowering the lifecycle cost of the building structures. ● Pultruded composites are extremely durable, have a long service life, require little maintenance, and mostly recyclable -- making them popular among architects, designers, developers, and builders since sustainability is now a key criterion for many construction projects. Conclusion With the many advantages, no wonder pultruded fiberglass profiles are widely adopted by designers, builders, and homeowners in a variety of applications, such as energy-efficient windows and doors, thermal breaks, window reinforcements, exterior trim, cladding, pergolas and arbors, columns, fencing and decking systems, and affordable modular housing systems. The materials are well-recognized for their superior performance in dimensional stability and thermal performance -- making them a great alternative for wood, PVC, steel, and aluminum in a variety of applications to achieve high cost-efficiency. Pultruded composites' low maintenance requirements, durability, and high strength characteristics also help homeowners reduce maintenance expenses and enable contractors to minimize recalls. With the aid of our design and engineering experts, you can select the right composition to meet specific needs, such as weight, flex, strength, density, firmness, and tensile requirements for construction projects of any nature.

Preparation of Sulphuric Acid by Contact process We will first start by addressing the question of what is sulphuric acid. Well, sulphuric acid is basically an oxidizing agent, a strong mineral acid, and a dehydrating agent. Sulphuric acid has the chemical formula H2SO4. The acid is a colourless liquid. It is soluble in water and generally releases heat on contact. Further, the acid is corrosive in nature to metals and tissues. It will even char wood and most other organic matter on contact, but chances of objects catching fire are null. The acid has a density of 15 lb/gal. Exposure to the acid can result in adverse health effects from inhalation. It depends on the rate of exposure and concentration. Sulphuric Acid 3D ball Structure That being said, the acid is usually manufactured using a method known as the contact process. Earlier, in this process, a chemical element known as platinum was first used as a catalyst. Later, an inorganic compound known as vanadium oxide replaced platinum due to cost constraints. In any case, today we will be looking at the contact process in detail. Contact process for manufacturing of sulphuric acid: Steps involved in the manufacturing of sulphuric acid are as stated below: Preparation of sulphur dioxide. Conversion of sulphur dioxide into sulphur trioxide. Conversion of sulphur trioxide formed into concentrated H2SO4. Step 1: Preparation of sulphur dioxide: SO2 is prepared by burning sulphur in the presence of excess air so that the product combines with oxygen which is helpful for the next stage. S(s) + O2 (g) → SO2(g) Step 2: Preparation of sulphur trioxide: Sulphur trioxide is formed when sulphur dioxide reacts with oxygen in a ratio of 1:1 at a temperature of 400 °C – 450°C and a pressure of 1-2 atm in the presence of V2O5 as a catalyst. This reaction is reversible in nature. 2SO2(g) + O2(g) ⇌ 2SO3(g) Step 3: Preparation of concentrated sulphuric acid: The sulphur trioxide formed is first made to react with concentrated sulphuric acid. Sulphur trioxide cannot be dissolved in water directly as it leads to the formation of fog. The product obtained after this reaction is known as oleum. The oleum obtained is then dissolved in water to obtain concentrated sulphuric acid. H2SO4 + SO3(g) → H2S2O7(l) H2S2O7(l) + H2O(l) → 2H2SO4 Uses of Sulphuric Acid In Industries: Up to 50 per cent of this liquid manufactured is used in the production of phosphoric acid which is in turn used to make phosphate fertilizers. It is used in the manufacturing of metals such as copper, zinc etc. 5 per cent of the produced acid is used in the making of fibres. In Domestic Environments: Used in acidic drain cleaners. Due to its strong dehydrating property, it can be used to remove the tissue paper. As a Catalyst: Used as a catalyst in the manufacturing process of nylon. Used in the Manheim process in the manufacturing of HCl. Used in petroleum refining. Frequently Asked Questions How Sulphuric acid is produced? Sulphuric acid is produced from sulphur. In the presence of air, sulphur dioxide is first obtained by burning the molten sulphur. In the presence of a catalyst for vanadium pentoxide, sulphur dioxide is then converted to sulphur trioxide. What type of acid is sulphuric acid H2SO4? Sulphuric acid is a powerful mineral acid that at all concentrations is soluble in water. Sulphuric acid contains two atoms of hydrogen, one atom of sulphur, and four atoms of oxygen. Sulphuric acid H2SO4- A colourless to dark brown liquid that is highly corrosive. What is the pH of Sulphuric acid? Because sulphuric acid is a strong acid, a sulphuric acid solution of 0.50 M has a pH near zero. Will sulphuric acid dissolve metal? Aluminum, which is a highly reactive metal, will not dissolve in oxidizing acids (e.g. nitric), as it will grow on its surface a protective layer of aluminum oxide. Thallium, for example, dissolves in sulphuric acid, but not in hydrochloric acid. Is H2SO4 a Monoprotic acid? The monoprotic acid is hydrobromic acid because only one proton (H) can be given. No monoprotic hydrogen exists. There are two acid protons in the starting acid, sulphuric acid (H2SO4). In other words, the sulfate molecule was bound to these acidic protons.