FRP grating What is composite material?
Composite materials, composite materials, or composite gratings are materials composed of two or more materials that create new materials that are superior to those of the original materials. This material works separately. (According to Wikipedia)
* History and development
* Classification of composite materials
* Manufacture technology
Composite materials in the form of conventional FRP grating
History of formation and development:
Simple composite materials have existed since ancient times. Around 5000 BC, Egyptians knew how to mix small stones into the ground before making a sharp effort to avoid warping when exposed to the sun. Or the ancient Greeks also know how to get honey mixed with soil, sand and gravel to form building materials and the Vietnamese from the old self built house with mud mixed with chopped straw to subulate the walls, when Drying the plastered compound will become more solid.
Papier-mâché, a mixture of paper and glue, has been in use for hundreds of years.
The first artificial fiber-reinforced plastic is bakelite dating back to 1907, although natural polymers like the previous wax.One of the most common and familiar mixtures is glass fiber, in which small glass fibers are embedded in a polymer material (usually an epoxy or polyester). Fiber is relatively hard but brittle, while polymers are flexible and flexible but weak. With this innovative combination, fiberglass after dipping into polymer material becomes stronger, stronger than the original, and thanks to the polymer composition, the material has a certain degree of flexibility, becoming pliable. Better off
Although, for a long time, until the 1950s, new composite materials science was formed and appeared in US missile technology. Since then the “new material”, the new composite material has truly emerged and developed worldwide.
Classification of composite materials:
– Polymer composite materials
– Carbon-carbon composite materials
– This is carbon fiber carbon fiber base material.
– Ceramic composite materials
– Metal composite materials
– hybrid materials
– Synthetic wood
WPC (wood plastic composite) is a composite material that is molded from wood pulp and resin, and additionally admixed with additives such as colorants, stabilizers and additives. Intense, flame retardant
Frp grating redSort by material and substrate nature
Composite on organic: composite paper base (paperboard), plastic composite, asphalt, rubber floor (particle board, fiber sheet, canvas, waterproof material, automobile tire) … This base can be combined with all kinds of aggregates such as: organic fibers (polyamide, kevlar, high mechanical aramid), mineral fiber (fiberglass, carbon fiber …) Type (Bo, aluminum …). On organic composite floor materials only withstand maximum temperatures in the range of 200 to 300 ° C
Synthetic minerals: concrete, reinforced concrete, ceramic composite, carbon-carbon composite. This type of foundation is usually combined with the types of reinforcement such as: metal fibers (Bo, steel …), metal particles (ceramic), ceramic particles (ceramic carbide, ceramic Nitrogen …). On a composite mineral bed, the maximum heat resistance is between 600 and 1000 ° C.
Synthesized on metal base: titanium alloy base, aluminum alloy base … Usually combined with the material in the form of: metal fiber (Bo …), mineral fiber (carbon, SiC …). As well as mineral-based composite materials, metal-based composites are capable of withstanding temperatures of around 600 to 1000 ° C
Frp grating pultruded that sharp frp grating variety frp grating application
Sort by aggregate shape
Synthetic materials of fiber
Fiber is a material that has a dimensional dimension (called length) that is much larger than the other two dimensional dimensions of space remaining. In the other two dimensions they distribute discontinuities in the composite material, and in length they can be continuous or intermittent. It is common for these types of fiber materials to be associated with the composite word in the name. Composite products for civil use are usually made from fiber composite materials, mainly on plastic.
Grain is discontinuous, other fibers are not of preferred size. The most common type of composite material is concrete, often referred to simply as concrete, which is often referred to as composite fiber composite material.
Synthetic materials and fiber
Concrete is a kind of synthetic (or composite) mineral base. When concrete is combined with reinforcing steel to make reinforced concrete, the artificial stone made of cement is the base material, the concrete aggregate is yellow sand and macadam is the core, and the reinforcement in the calf Cardboard is fiber.
Manufacture technologyManufacture technology
– Mold technology in contact
– Paving machine
– Mold technology with elastic diaphragm
– Mold the vacuum
– vacuum mold- autoclave
– Mold diaphragm
– Pressure impregnation technology
– Pressure under normal conditions
– pressurize the vacuum
– Molding technology
– Direct stamping
– Die casting
– hot stamping
– Technology wrap
– Technology methods
– Pulltrusion technology
In particular, pulltrusion technology is a CONTINUOUS and automated process. PROFILE products (U-shaped, I-shaped) have good physical and chemical properties, which can replace traditional materials such as steel, aluminum and wood in many applications. Low scrap rate. The ability to choose the type of plastics, reinforcement material as well as labor intensity, the molding price can be adjusted in wide range.
Composite materials in the form of conventional FRP grating
• Overview of FRP grating:
FRP grating, also known as fiberglass reinforced plastic or glass fiber mesh, is a composite material produced by combining glass substrate and fiberglass. Fiberglass mesh is not corroded as other metal materials, thus minimizing the maintenance cost for the user.
FRP grating is cast alternately oriented layers of continuous fiberglass for strength and resin to reinforce the strands to provide shape and corrosion resistance. The two-dimensional power is relatively high so the material can withstand cuts in the panel to allow piping or equipment to pass without additional support. Not only that, fiberglass mesh also has high impact resistance as well as good chemical resistance.
• Composition of FRP grating:
FRP lined lining consists of continuous glass fibers wrapped in plastic and wrapped in a protective sheet that protects the fibers and allows the plastic to penetrate the outermost part of the rod as well as penetrate the filaments. the provincial. This ensures that the surface of the FRP grating is smooth and at the same time resistant to corrosion of the impurities and the surface environment, with a higher glass / plastic ratio than the molded products. Individual bars are then assembled with cross bars and epoxy to mechanically load the loadbars.
Wood slabs are also of constant strength, with much higher glass content, which gives them a greater range of castings. This product is usually indicated in applications that require longer stretches or heavier loads. Many types of resins can be used in the manufacture of FRP gratings including polyester, polyurethane, epoxy vinyl ester, isophthalic polyester, orthophthalic and Phenolics.
* • Application of FRP grating:
FRP grating is commonly used in chemical environments where the material has to be highly corrosion resistant and which is concerned with the adhesion safety of the substrate. Such as used to make stairs, walkways, urban drainage systems …
In addition, the industry also applies fuzzy grids in the bottling lines, food processing plants, lifting stations, commercial fish tanks, lubricating oil bases, plating shops, facilities Canned beverages, chemical plants and paper and pulp mills.