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  • Advantages of FRP rebar 1. Low weight and high strength FRP rebar has double the strength of standard steel, but only a quarter of the weight. The low weight facilitates handling. FRP rebar is produced using high quality fibres, with a high fibre content of approximately 80%. The fibers are embedded in either a polyester or winylester or epoxy resin matrix. This gives the rod a high tensile strength prominient in the longitudinal directions. 2. Corrosion-resistance FRP rebar is corrosion resistant and therefore the only currently available system which can be regarded as permanent, even under difficult conditions with aggressive water and rock deformations. These products are used more and more increasingly for soil strengthening. 3. Excellent cuttability FRP rebar is easy to cut and that can help to protect the toolbit of cutter. 4.Anti-magnetic Reinforcement of beams and columns are the basic cases of application and here the special reinforcement of concrete plates on an airfield. Due to the necessity of a non-magnetic section, FRP reinforcement and all other parts must all be free from steel completely. 5. High thermal isolation FRP material has a significantly lower thermal conductivity than steel which avoids thermal bridges or heat transfer. 6. No electrical conductivity FRP material is electric isolating, so no electric flow will take place in the materials. 7. UV protection(optional) FRP products can be treated with a special UV protection, so the resin will not degrade when exposed to sunlight.
  • Advantages of FRP rock bolts 1. Low weight and high strength FRP rock bolts have double the strength of standard steel, but only a quarter of the weight. The low weight facilitates handling. The FRP bolt is produced using high quality fibres, with a high fibre content of approximately 80%. The fibers are embedded in either a polyester or winylester or epoxy resin matrix. This gives the rod a high tensile strength prominient in the longitudinal directions. 2. Corrosion-resistance FRP rock bolts are corrosion resistant and therefore the only currently available system which can be regarded as permanent, even under difficult conditions with aggressive water and rock deformations. These products are used more and more increasingly for soil reinforcement and ground anchoring. 3. Excellent cuttability FRP rock bolts are easy to cut and that can help to protect the toolbit of coal cutter. 4.Anti-static conditioning (optional) For application in tunnelling and mining an anti-static coating can be applied as an option to avoid any sparks in explosive environment. 5. Continuous threaded profile Due to its continuous thread profile, the FRP rock bolts offer a maximum bondage with all the grouting material and also concrete. The continuous thread profile has a great possibility to connect with couplers in any length and also can take high ultimate load. 6. High end loading The special thread profile and an optimized matching between bolt thread and nut thread ensure high end loads that can almost reach the level of steel anchor systems.
  • What are composites? What is FRP? What are composites? Composites are defined as materials which consist of not less than two different component materials, neither of which are well suited for construction purposes on their own, but which in combination result in a very strong and rigid material.  In fact, Composites have been known and used in construction for thousands of years. Straw mixed with clay for building clay huts in the Stone Age is one example. Steel-reinforced concrete is an example from modern times. In combinations of this type, tensile force is absorbed by the steel reinforcement, while the concrete absorbs the compressive load.  Composites basically consist of reinforcements and matrix and can be roughly divided into three groups according to the adopted matrix, which are metallic matrix composites, ceramic matrix composites and polymer matrix composites.  Typically, reinforcing materials are strong with low densities while the matrix is usually a ductile, or tough, material.If the composite is designed and fabricated correctly, it combines the strength of the reinforcement with the toughness of the matrix to achieve a combination of desirable properties not available in any single conventional material---That is also the consequence& charm of composites. What is FRP? FRP, which is the abbreviation of fiber-reinforced plastic, is a kind of composite material and belong to polymer matrix composites. That mean FRP is made of polymer matrix reinforced with fibers. The polymer matrix is usually an epoxy, vinylester of polyester thermosetting plastic while the fibers are usually fiberglass, carbon or aramid. FRP, with its good properties of light weight, high strength, excellent anti-corrosion and electrical insulation, etc, it can be widely used. The major applications are in the fields of aerospace, military, electrical utility, mining, ocean engineering…..
  • The introduction of pultrusion process What is FRP/pultrusion process? Fiber reinforced polymer or fiber reinforced plastic, FRP for short belongs to polymer matrix composites and can be produced by many crafts, such as pultrusion,  hand lay-up molding, filament winding, SMC/BMC, RTM, etc. Pultrusion is a manufacturing process for producing continuous lengths of FRP structural shapes. Raw materials include liquid resin mixture matrix(containing thermosetting resin, fillers and specialized additives)and reinforcement. The process involves pulling all the raw materials through a heated steel forming die using a continuous pulling devices. The reinforcements are in continuous forms and saturated with the resin mixture in the resin impregnator and pulled through the die. The gelation (or hardening) of the resin is initiated by catalyst in the resin mix and then by the heat from the die and soon a rigid, cured profiles is formed that corresponds to the shape of the die. The rate of the chemical reaction is controlled by heating and cooling zones along with the length of the die. During the last step, the profiles are shorted by a saw….. Pultrusion can be used to produce practically most constant cross sectional profiles. As pultrusion is a continuous process, the product can be manufactured to any length and the limit is only dictated by the ability to transport it. Although the concept of pultrusion seems quite simple, there is a delicate balance that has to be maintained between raw materials, temperature and production speed, etc.
  • The choosing of resin& fiber Matrix   The role of the matrix in a composite profile is partly to bind the reinforcement together, and partly to keep the reinforcement correctly positioned in relation to the cross section with a view to optimal utilization of the mechanical properties. The type of matrix also determines properties such as corrosion resistance, electrical insulation properties, and fire and temperature resistance. The following three types of matrix are fundamentally well suited to the pultrusion process. There are polyester, epoxy and phenol. Polyester Polyester is the most frequently used matrix as it produces a composite with good all-round properties. Unsaturated polyester can be divided into three main groups: orthopolyester, isopolyester and vinylester. Compared with orthopolyester, isopolyester increases impact resistance, provides greater flexibility, and increases resistance to temperatures. It also increases corrosion resistance. Vinylester has even better corrosion resistance and thermal properties. Since vinyl ester has greater elongation properties than ortho- and isopolyester, it also provides a composite with better impact resistance and improved fatigue properties. Epoxy Epoxy is used primarily for carbon-reinforced profiles, giving composites better fatigue and mechanical properties. Epoxy is more resistant to thermal influences and has better electrical properties. Phenol Phenol is used when there are requirements to high fire resistance, temperature resistance, low smoke generation, and flame retardation when subjected to fire. The choose of matrix can be decided according to the finished products application requirements and surroundings. “Suitability” is one of our designer’s last standards        Reinforcements Reinforcing materials can be various types of fiber roving, weaves and mats. The orientation of reinforcements is important for the finished profile’s mechanical properties. And the combination of different reinforcements depends on the customer’s requirements in the profiles’ strength, load capacities in different directions. Structural profiles are for example often subjected to loads that are transversal to the length of the profile (i.e. transversal to the direction of pultrusion), and these profiles must often be capable of resisting pull-out loads from bolts etc. Under such situation, not only smooth unidirectional roving is therefore used, but also mats and weaves with different fiber orientations are used. Mats and weaves with fibre orientations of between 45° and 90° contribute primarily to improving bolt pull-out strength and mechanical properties in the transverse direction. If a profile is to be located in a corrosive environment or often exposed to the sun, a special “surfacing veil” is used together with the above reinforcements. The combination of roving, weave, mat and surface veil can be designed and decided according to the finished products application requirements and surroundings. “Suitability” is one of our designer’s last standards。        
  • Advantages of FRP Pultruded profiles 1.High strength FRP Pultruded  profiles is stronger than structural steel on a pound-for pound basis. It has been used to buildings, walkway, sub-floors and platforms. 2.Light weight FRP is 20-25% the weight of steel and 70% the weight of aluminum. FRP profiles are easily transported, handled and lifted into place. Total structures can often be preassembled and shipped to the job site ready to installation 3.  Anti-corrosion FRP will not rot and are impervious to a broad range of corrosive elements. This feature makes frp a natural selection for indoor or outdoor structures in pulp and paper mills, chemical plants, water and sewage treatment plants, structural near salt water and other corrosive environments. 4.  Electro-magnetic transparency FRP are transparent to radio waves, microwaves and other electromagnetic. It is widely used to make antennas. 5.Non-conductive FRP has low thermal/ electrical conductivity. 6.Dimensional stability The coefficient of thermal expansion of FRP Pultruded  profiles is slightly less than steel and significantly less than aluminum. Aesthetics FRP are pigmented throughout the thickness of the part and can be made to virtually any desired custom color. Special surfacing veils are also available to create special surface appearances such as wood grain, marble, granite, etc.
  • Physical Parameters of Pultruded Profiles Mechanical performance Value Units Test method Tensile strength LW 230-600 Mpa ASTM D-638 CW 45-80 Tensile modulus LW 18-30 Gpa ASTM D-638 CW 7-13       Flexural strength LW 300-700 Mpa ASTM D-790 CW 80-120 Flexural modulus LW 20-26 Gpa ASTM D-790 CW 7-12 Compressive strength LW 280 Mpa ASTM D-695 CW 105 Compressive modulus LW 21 Gpa ASTM D-695 CW 7.9 Interlayer shear strength LW 25 Mpa ASTM D-2344 Impact strength   280 KJ/M2 ASTM D-256   Physical property Value Units Test method Barcol Hardness 50 --- ASTM D-495 Water absorption(25℃,24h) 0.2-0.5 % ASTM D-570 Density 1.75-2.00 g/cm3 ASTM D-792 Coefficient of thermal expansion(LW) 5.0 10-6/℃ ASTM D-696 Coefficient of thermal conductivity 0.4 W/(m.K) ASTM C-518 Elongation to break 0.9 % ASTM D-638   Electrical property Value Units Test method Arc resistance(LW) 120 seconds ASTM D-495 Dielectric constant(PF) 5 @60hz ASTM D-150 Dielectric strength(PF) 8 KV/mm ASTM D-149 Dielectric strength(LW) 1.6 KV/mm ASTM D-149 Surface resistance 1015-1012 Ω ASTM D-257 Volume resistance 1015-1012 Ω.cm ASTM D-257   Flammability property Value Units Test method Tunnel test Max 25 second ASTM E-4 Oxygen data 25-28   % ASTM 2863 28-32 >32 Flammability classification Self extinguish   ASTM D635 ※ LW - lengthwise   CW-crosswise  PE=perpendicular to laminate face.  ※  For more information, pls contact with Jinglue  ※Your designed profiles are also available.
  • List of standard FRP Pultruded profiles view/instance type dimension (mm) approximate weight(g/m)     round tube AxB JLF-RT32 32x27 430 JLF-RT34 34x38 540 JLF-RT36 36x30 580 JLF-RT38 38x32 610 JLF-RT40 40x34 650 JLF-RT50 50x44 850 JLF-RT70 70x57 2340 J LF-RT76 76x60 3160   Angle AxBxC   J LF-A38 38x38x4.8 640 J LF-A50 50x50x6.3 1100 J LF-A376 76x76x6.3 1710 J LF-A80 80x80x8 2250 J LF-A101 101x101x8 2840   round rod A   J LF-RR12 12.7 240 J LF-RR20 20 610 J LF-RR22 22 740 J LF-RR24 24 880 J LF-RR25 25.4 990     square tube AxB   JLF-ST38 38x3.5 980 JLF-ST50 50x5 1660 JLF-ST63 63x6.3 2600 JLF-ST76-3 76x3.5 2000 JLF-ST76-6 76x6.3 3150 JLF-ST89 89x6.3 3860 JLF-ST101-6 101x6.3 4400 JLF-ST101-8 101x8 5500 rectangular tube AxBxCxD   JLF-RT65/30 65X30X4X4 1250 JLF-RT75/35 75X35X3X6 1440 Flat bar AxB   JLF-FB35 35x11 710 JLF-FB100 100x2 370 Channel AxBxC   JLF-U60 60x40x5 1200 JLF-U89 89x38x6.3 1780 JLF-U127 127x42x6 2200 JLF-U152 152x4x9.5 3850 JLF-U190 190x55x6.3 3400 Gear tube AxB   J LF-G36 36x27 660 I beam AxBxC   JLF-I25/15 25x15x4.2 390 JLF-I38/15 38x15x4.2 490 JLF-I50/18 50x18x4.5 700   ※  For more information, pls contact with Jinglue ※Your designed profiles are also available.
  • Chemical resistance chart of FRP          Resin Medium Vinylester Iso-phthalic Ortho-phthalic concentration% Maximum Use Temperature F/℃ concentration% Maximum Use Temperature F/℃ concentration% Maximum Use Temperature F/℃ Acetic Acid 50 180/82 50 125/52 5 77/25 Hydrofluoric Acid 10 149/65 ◎ ◎ ◎ ◎ Nitric Acid 20 130/54 20 70/21 20 N/R Phosphoric Acid 100 210/99 100 120/49 80 N/R Hydrochloric Acid 37 150/65 37 75/24 10 86/30 Sulfuric Acid 50 183/80 25 75/24 10 ◎ sodium bromide ALL 210/99 ALL 170/77 5 ◎ sodium hydroxide   25 180/82 N/R N/R N/R N/R sodium sulfate ALL 210/99 ALL 170/77 ALL 104/40 Ammonium Chloride ALL 210/99 ALL 170/77 ALL ◎ Ammonium bicarbonate 50 160/70 15 125/52 ALL ◎ ammonium sulfate ALL 210/99 ALL 170/77 ALL ◎ calcium nitrate ALL 210/99 ALL 180/82 ALL ◎ potassium dichromate ALL 210/99 ALL 170/77 ALL 77/25 Potassium sulfate ALL 210/99 ALL 170/77 ALL 104/40 Methanol 10 183/84 N/R N/R N/R N/R ethyl alcohol 10 155/82 50 75/24 10 77/25 Formaldehyde 37 140/60 50 75/24 25 86/30 Carbon tetrachloride 100 92/40 100 N/R 100 N/R chlorinated water SAT 200/93 SAT 80/27 SAT N/R Ferric Chloride ALL 210/99 ALL 170/77 ALL 104/40 Mercuric Chloride 100 210/99 100 150/66 100 104/40 hydrogen peroxide 30 150/65 5 100/38 5 N/R magnesium nitrate ALL 210/99 ALL 140/60 ALL 86/30 aluminum hydroxide 100 180/82 100 160/71 ALL ◎ ammonia water 28 100/38 28 N/R ALL N/R benzene 100 92/40 ALL N/R ALL N/R petrol 100 180/82 100 75/24 100 95/35 Glycerin 100 210/99 100 150/66 100 ◎ Vinegar 100 210/99 100 170/77 ALL ◎ Seawater ALL 210/99 ALL 158/70 ALL 113/45 Distilled water 100 180/82 100 170/77 ALL 86/30     ※ ALL– any density    SAT–saturated solution    N/R– not be recommended;◎- not be tested ※ This tablet is only for reference when you choose our company’s FRP products. ※  For more information, pls contact with Jinglue
  • Specifications and loaded capacity of FRP pultruded gratings /upload/file/files/20111111194515.pdf
  • Applications of FRP products Aerospace/military Automotive Rail transportation Marine/marinas Electrical utility Cooling tower Telecommunications Marine/marinas Electrical utility Electrical Electrical  Infrastructure Building and construction Mining Aerospace/military Food & beverage Consumer Water/wastewater Oil & gas Pulp & paper Sports & recreation Theme park Trade show Rail transportation Automotive

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