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Views: 0 Author: Site Editor Publish Time: 2026-08-17 Origin: Site
1. Typical Application Industries and Scenarios
Power and Electrical Industry
Round rods are the most widely used category among glass fiber profiles. In high-voltage electrical equipment, round rods are used as insulating structural components for high-voltage switches, transformers and capacitors. They are also extensively adopted in antennas in communication equipment, wiring support pillars and insulating components of railway conductors. In addition, round rods are applied in scenarios such as core rods of organic composite insulators, support rods for metal-free optical cables and sucker rods for oilfields.
Chemical Anti-Corrosion Engineering
Round rods have excellent resistance to the atmosphere, water, acids, alkalis and salts of general concentrations, as well as various oils and solvents. In onshore and offshore anti-corrosion projects, cooling towers, sewage platform systems and chemical equipment supports, round rods are gradually replacing carbon steel, stainless steel, wood and non-ferrous metals.
Municipal and Transportation Facilities
Round rods are widely used in ladder handrail systems, cable trays, municipal facilities, traffic guardrails and other fields. They are also applied in the retaining walls of buildings such as parks and office buildings, as well as the connections between bricks on the slope protection of roads and rivers.
Sports, Leisure and Daily Use
The characteristics of light weight and good toughness make round rods suitable for kite skeletons, flying saucers, bow backs, electric aircraft and various toys. Meanwhile, they are widely used for flagpoles, fishing rod tips, golf bag rods, model skeletons, etc. In the agricultural field, round rods are used as support poles for greenhouses and support poles for garden trees.
Construction and Machinery
Round rods are used for building and bridge reinforcement, transmission shafts of mechanical equipment, mechanical transmission components such as PCB equipment.
2. Key Industry Requirements
Requirement Dimension | Customer Concern | Typical Scenario |
Mechanical strength | Whether it can withstand tensile, bending, and impact loads without deformation or fracture | High-voltage switch pull rods, chemical equipment support beams |
Corrosion resistance | Whether performance degrades in acid-alkali salt-spray environments | Offshore platforms, chemical plants, wastewater treatment tanks |
Electrical insulation | Whether it can reliably isolate at high voltage without breakdown or tracking | Substation insulator core rods, high-voltage switch insulating parts |
Weather resistance | Whether it ages and becomes brittle after long-term outdoor sun and rain exposure | Outdoor antenna brackets, traffic guardrails, garden support poles |
Dimensional precision | Whether diameter tolerance meets assembly requirements and straightness is up to standard | Precision mechanical drive shafts, PCB equipment components |
Customer Question | Standard Answer |
Q: How much tensile force can round rods withstand? Will they break easily? | Our round rods have tensile strength ≥ 600MPa, equivalent to withstanding over 60kg of force per square millimeter. At the same diameter, strength exceeds ordinary carbon structural steel (Q235 ~370MPa), fully capable for insulating pull rods, load-bearing supports, and similar applications. |
Q: How long can they last in acid-fume environments of chemical plants? | The rod matrix uses corrosion-resistant resin (e.g., vinyl ester). After long-term immersion in 10% sulfuric acid, hydrochloric acid, and other media, strength retention still reaches over 85%. Actual service life in chemical environments can reach 10~15 years, far exceeding ordinary carbon steel (which severely rusts in 2~3 years). |
Q: Will they age from sun exposure when used outdoors? | Standard products already include UV stabilizers and anti-aging surface veil. After 1,000 hours of xenon lamp accelerated aging testing, the surface shows no cracking with strength retention ≥ 90%. Normal outdoor service life is 15~20 years. |
Q: What diameter tolerance can be achieved? | φ3~10mm tolerance ±0.05mm, φ10~30mm tolerance ±0.10mm, straightness ≤0.5mm per meter. If you have higher precision requirements, we can provide precision grinding services. |
Round rods are manufactured using E-glass fiber yarns, mats, and fabrics as reinforcement, impregnated with solvent-free resin (epoxy / polyester / vinyl ester), and continuously baked and consolidated in specialized dies via the pultrusion process. The product features extremely high mechanical strength in the fiber direction, excellent dielectric properties, and availability in any length.
Round rod diameters cover a very wide range, with standard outer diameters from φ1.0mm to φ80mm. Common specifications include: φ6.9mm, φ7.9mm, φ8.5mm, φ9.5mm, φ10mm, φ11mm, φ12mm, φ12.7mm, φ16mm, φ18mm, φ25mm, etc. Length can be customized per customer requirements.
Resin System | Applications | Recommendation Priority |
Unsaturated Polyester (UP) | General industrial structural parts, general support, economical applications | ⭐⭐⭐ Best Value Choice |
Vinyl Ester (VE) | Chemical corrosion resistance, marine engineering, acid-alkali corrosive environments | ⭐⭐⭐ Best for Corrosive Environments |
Epoxy Resin (EP) | High-voltage insulation, precision electrical, high-strength load-bearing | ⭐⭐⭐ Best for Electrical / High Strength |
Unsaturated polyester resin offers good mechanical properties, cost-effectiveness, and easy processability, suitable for general applications. Vinyl ester resin provides enhanced chemical resistance and improved mechanical strength, commonly used in corrosive environments. Epoxy resin features excellent mechanical properties, high temperature resistance, and superior bonding capability, widely used in applications requiring exceptional strength and durability.
Application | Recommended Diameter | Recommended Resin | Key Requirements |
High-voltage switch insulating pull rod | φ16~25mm | Epoxy resin | Dielectric strength ≥ 15kV/mm |
Chemical equipment support beam | φ20~30mm | Vinyl ester resin | Acid-alkali corrosion resistant |
Garden tree support pole | φ8~12mm | Unsaturated polyester | Cost-effective, lightweight and high strength |
Precision mechanical drive shaft | φ6~10mm | Epoxy resin | Dimensional precision ±0.05mm |
Lightweight & High Strength: Density is only 1/4 of steel, while tensile strength ≥ 600MPa, comparable to ordinary carbon steel. At the same diameter, it is much lighter than metal, facilitating transportation, handling, and installation, significantly reducing labor costs.
Never Rusts: Completely iron-free, fundamentally eliminating electrochemical corrosion. After long-term use in humid, acid-alkali, and salt-spray environments, the surface remains as smooth as new, with no need for regular rust removal and painting like metal.
Excellent Electrical Insulation: Volume resistivity ≥ 10¹⁴ Ω·cm, dielectric strength ≥ 15kV/mm, making it an ideal insulating material for high-voltage power equipment. It safely isolates high voltage in high-voltage switches, transformers, capacitors, and other applications.
UV & Weather Resistant: Enhanced with UV stabilizers and anti-aging surface veil. After long-term outdoor sun and rain exposure, the surface shows no cracking with strength retention ≥ 90%, and service life reaches 15~20 years.
Easy Installation & Machining: Can be cut, drilled, and tapped with standard carbide tools. Lightweight and operable by one person, no heavy lifting equipment required.
5. Customizable content
Customization Item | Available Range / Specification | Tolerance / Notes |
Length | Standard: 1000mm / 2000mm / 3000mm; Max 6000mm | Cutting tolerance ±1mm (precision cut ±0.5mm) |
Diameter | Φ2.5mm ~ φ32mm | Standard tolerance ±0.05~0.15mm (depends on diameter); precision grinding up to ±0.02mm |
Color | Internal coloring (full-body) or surface spraying; Standard colors: White, black, gray, red, orange, yellow, green, blue; Pantone color number customization supported | PANTONE color customization supported |
Surface Treatment | Standard natural finish / precision grinding (Ra≤1.6μm) / sanding (enhanced adhesion) / spray coating / end chamfering, drilling, tapping | Multiple treatments can be combined |
Packaging Method | PE film bundling / heavy-duty carton (foam dividers) / export wooden case / palletization | Matched by transport method and quantity |
OEM Customization | Resin formulation (UP/VE/EP) customization / non-standard custom profile mold development / post-processing (cutting, drilling, tapping) / component assembly / brand laser marking or silk-screening | Mold development cycle: approx. 15~30 days; samples: 5~7 working days |
We provide full-chain OEM/ODM services from material formulation → cross-section design → mold development → pultrusion production → post-processing → assembly and packaging.
OEM Service Process:
Requirement Communication → Drawing / Sample Confirmation → Mold Development (if required) → Sample Production (5~14 working days) → Customer Confirmation → Mass Production → Full Inspection & Packaging → Delivery & Shipment
Minimum Order Quantity (MOQ):
Standard specifications: 5000~1,0000 meters (negotiable for first cooperation)
Non-standard mold opening: From 2,0000 meters (mold fee charged separately)
Sample order: Small quantity samples available (sample fee can be deducted from subsequent bulk orders)
