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China Suppliers Factory GFRP Strength Member for Optical Cable Reinforcement and Tensile Strength Improvement
Product Introduction
Optical cable reinforcement is an important component of optical cable, generally placed in the center of the optical cable. Its role is to support the optical fiber unit or optical fiber bundle, improving the tensile strength of the optical cable. Traditional optical cables use metal reinforcements.
FRP non-metallic reinforcement parts are more and more used in various optical cables for their advantages of light weight, high strength, corrosion resistance, and long life. GFRP fiber optic cable reinforcement core (glass fiber) is a new type of high-performance engineering composite material, which is made by pultrusion process after mixing resin as matrix material and glass fiber as reinforcement material.
GFRP non-metallic fiber optic cable reinforcement overcomes the defects of traditional metal fiber optic cable reinforcement, has excellent corrosion resistance, lightning resistance, electromagnetic field interference resistance, high tensile strength, light weight, environmental protection, energy saving and other significant advantages, and is widely used in a variety of fiber optic cables.
GFRP Features & Advantages
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High Performance: High tensile strength, high modulus, low thermal conductivity, low extension, low expansion, and wide temperature range.
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Weather & Lightning Resistance: Non-metallic materials are not sensitive to electric shock, making them highly suitable for lightning, rain, and other harsh climatic environment areas.
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Chemical Corrosion Resistance: Compared with the metal core, the GFRP reinforced core will not produce gas caused by the chemical reaction of metal and oil paste, thus protecting the fiber transmission index.
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Zero Electromagnetic Interference: It has the characteristics of high tensile strength, light weight, excellent insulation performance, and no electromagnetic interference.
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Safe Co-installation: The cable with a GFRP reinforced core can be installed next to power lines and power supply devices, and will not be interfered by the induced current generated by them.
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Easy Processing: Smooth surface, stable size, easy processing and laying, ensuring a wide range of applications.
GFRP Core Specifications
Standard Diameter Table Φ (Unit: mm)
| 0.40 | 0.50 | 0.60 | 0.70 | 0.80 | 0.90 | 1.00 | 1.10 | 1.20 | 1.30 | 1.40 |
| 1.50 | 1.60 | 1.70 | 1.80 | 1.90 | 2.00 | 2.10 | 2.20 | 2.30 | 2.40 | 2.50 |
| 2.60 | 2.70 | 2.80 | 3.00 | 3.30 | 3.40 | 3.50 | 3.80 | 4.00 | 4.60 | 5.00 |
Standard Delivery Lengths:
- Diameter (Φ0.40 - Φ2.3mm): 50.4km/barrel or customized
- Diameter (Φ2.40 - Φ3.5mm): 25.2km/barrel or customized
- Diameter (Φ3.60 - Φ5.0mm): 12.5km/barrel or customized
Note: Non-standard diameters and lengths can be produced according to user requirements.
GFRP Flat Core Specifications
| 0.60 x 1.30 mm | 0.70 x 3.00 mm | 1.00 x 3.00 mm | 1.20 x 3.80 mm | 1.27 x 3.00 mm | 1.40 x 3.00 mm | 1.60 x 3.00 mm |
Standard Delivery Lengths:
- Thickness (1.00mm and below): Standard delivery length ≧ 25km (Jet code meter)
- Thickness (1.20mm and above): Standard delivery length ≧ 15km (Inkjet meter)
Note: Non-standard sizes and lengths can be produced according to user requirements.
Packaging & Storage
GFRP reinforced core - Packaging (Wooden cable tray / Plastic cable tray)
GFRP Reinforced Core - Storage Guidelines
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The cable tray shall not be placed in a flat position and shall not be stacked high.
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The disc reinforcement core shall not be subjected to long-distance rolling.
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It shall not be subjected to collision, crushing, or any mechanical damage.
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Prevent moisture and long-term exposure to the sun, and strictly prohibit long-term rain exposure.
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Storage and transportation temperature range: -40°C ~ +60°C.
Technical Parameters
| Test Item | Unit (or condition) | Technical Parameter |
|---|---|---|
| Out-of-roundness | % | <5 |
| Appearance | - | No burrs, no cracks, feel smooth |
| Diameter tolerance | % | ±2 |
| Specific gravity | g/cm³ | 2.05 ~ 2.15 |
| Tensile strength | MPa | ≥1100 |
| Tensile modulus of elasticity | GPa | ≥50 |
| Bending strength | MPa | ≥1100 |
| Flexural elastic modulus | GPa | ≥50 |
| Elongation at break | % | 2.5% ≤ X ≤ 4% |
| Coefficient of linear expansion | 1/℃ (-30℃ ~ +80℃) | ≤8×10⁻⁶ |
| Thermal shrinkage rate | % | 0 |
| Water absorption | % | ≤0.1 |
| Minimum instantaneous bending radius | mm (20℃±5℃) | 25D |
| High temperature bending property | (50D, 120℃, 100h) | No burrs, no cracks, feel smooth, no bending, can spring straight |
| Low temperature bending property | (50D, -40℃, 100h) | No burrs, no cracks, feel smooth, no bending, can spring straight |
| Torsional property | ±360°/m | Indeterminate |
Frequently Asked Questions (FAQ)
1. What is a GFRP fiber optic cable reinforcement core?
A GFRP (Glass Fiber Reinforced Polymer) core is a high-performance composite material made by mixing resin and glass fiber through a pultrusion process. It is placed in the center of optical cables to support the fiber units and improve the overall tensile strength.
2. What are the main advantages of using GFRP over metal reinforcements?
Unlike traditional metal cores, GFRP is non-metallic, lightweight, and highly resistant to corrosion and electromagnetic interference. It also avoids chemical reactions with oil pastes that could affect fiber transmission and is completely safe from lightning strikes.
3. In what environments are GFRP reinforced cores most suitable?
Because they are insensitive to electric shock and resistant to chemical corrosion, GFRP cores are ideal for areas prone to lightning, heavy rain, and harsh climatic environments. They can also be safely installed next to high-voltage power lines.
4. What are the standard delivery lengths for GFRP cores?
Delivery lengths depend on the diameter. For diameters between Φ0.40-Φ2.3mm, the standard length is 50.4km per barrel. For Φ2.40-Φ3.5mm, it is 25.2km per barrel, and for Φ3.60-Φ5.0mm, it is 12.5km per barrel. Custom lengths are also available upon request.
5. How should GFRP reinforced cores be properly stored?
Cable trays should not be placed flat or stacked too high. The cores must not be rolled over long distances, subjected to mechanical damage, or exposed to long-term rain and moisture. The recommended storage and transportation temperature is between -40°C and +60°C.
6. Can GFRP cores withstand extreme temperatures?
Yes, GFRP cores have a wide operating temperature range. They exhibit excellent high and low-temperature bending properties, maintaining a smooth surface without cracking or bending permanently even after 100 hours of testing at 120°C or -40°C.