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400gsm Fiberglass Cloth Roll
Product Overview
400gsm fiberglass cloth roll is a heavy-duty structural fabric manufactured from high-strength E-glass filaments, engineered for demanding load-bearing applications. With an areal weight of 400 g/m² ± 5% and thickness ranging from 0.38 mm to 0.45 mm, this cloth delivers exceptional tensile strength of 380 MPa in the warp direction and 360 MPa in the weft direction. The robust weave design incorporates a high fiber volume fraction (up to 60%) that enables fabrication of thick, high-performance laminates with minimal ply count. The cloth operates continuously at temperatures from –60°C to +550°C and is compatible with all major resin systems. The roll format provides efficient material utilization for large-scale industrial applications including wind energy, marine, and infrastructure projects.
Core Advantages
Product Specifications
| Fiber Composition | High-strength E-glass |
| Weave Type | Plain, Twill, or 8-Harness Satin |
| Areal Weight | 400 g/m² (±5%) |
| Thickness | 0.38 – 0.45 mm |
| Tensile Strength (Warp) | ≥ 380 MPa |
| Tensile Strength (Weft) | ≥ 360 MPa |
| Tensile Modulus | 72 – 78 GPa |
| Fiber Diameter | 9–13 µm |
| Yarn Count | 14 × 14 per inch |
| Continuous Operating Temperature | –60°C to +550°C |
| Roll Width | 800 mm, 1000 mm, 1200 mm |
| Roll Length | 30 m, 60 m, 100 m |
Application Fields
Handling & Installation Notes
Frequently Asked Questions
400gsm cloth provides 25% higher tensile strength per layer and 35% greater flexural modulus compared to 300gsm cloth. The heavier fabric reduces the number of plies needed for equivalent laminate thickness, simplifying manufacturing processes. For applications requiring high load capacity with minimal weight penalty, 400gsm cloth offers improved mechanical performance while maintaining good handling characteristics.
For vacuum infusion, use low-viscosity resins (100–200 cP) to ensure complete wet-out through the dense weave structure. The cloth's permeability of 1.2 × 10⁻⁹ m² requires infusion times of 8–15 minutes per meter length. We recommend pre-heating resin to 35–40°C to improve flow and reduce void content. A flow medium is recommended for panels larger than 2 m².
Yes, the cloth is suitable for prepreg production with epoxy, BMI, and phenolic resin systems. The uniform thickness allows precise resin content control (32–38% by weight). For prepreg applications, we recommend using resin film thickness of 0.10–0.14 mm per ply. The cloth provides stable handling characteristics on prepreg machines and maintains excellent tack during lay-up.
For pipe wrapping, the cloth provides external corrosion protection and structural reinforcement. Maximum operating pressure depends on the substrate pipe's design parameters. The cloth has been tested in applications with external pressures up to 12 MPa when combined with a rigid laminate structure. Always follow pipe manufacturer guidelines and perform pressure testing.
400gsm cloth maintains mechanical properties down to –196°C. At cryogenic temperatures, tensile strength increases by approximately 8–10% due to molecular alignment effects, while elongation decreases slightly. The cloth is suitable for cryogenic storage tanks, superconducting magnet supports, and aerospace applications requiring extreme temperature resistance.
For structural repairs, use a minimum overlap of 75 mm with 6–10 plies of 400gsm cloth. The overlap should be designed so that the repair strength exceeds the original structure's design strength. Use a scarf angle of 3–5 degrees for high-load areas. Always perform destructive testing on repair samples to validate the bond quality.
