S-2 Glass Fabric (Ballistic)
Key Features
- S-2 high-strength glass — tensile ≥4500 MPa, modulus ≥85 GPa
- Satin 5HS / 8HS weave for deep drape over contoured armor and helmet geometries
- Three areal-weight grades (280 / 480 / 540 g/m²) cover thin prepreg to thick armor
- Ballistic-grade sizing qualified for phenolic, epoxy and vinyl ester armor matrices
- Used in NIJ Level III/IV armor backing and helicopter floor armor
S-2 Glass Fabric is a high-strength ballistic and aerospace cloth woven from S-2 magnesium-aluminum-silicate glass yarn, used as the reinforcement layer in lightweight armor composites and impact-tolerant aerospace structure. Weave construction is satin — 5-harness (5HS) for moderate drape on contoured armor panels, or 8-harness (8HS) for the deepest drape over compound curvatures such as helmet shells. Standard areal weights are 280, 480 and 540 g/m² to cover the range from prepreg layup of contoured parts up to thick monolithic armor laminates. Roll widths are 1000 mm and 1270 mm.
The fiber itself delivers single-filament tensile strength ≥4500 MPa and modulus ≥85 GPa — the same high-strength S-2 chemistry as the matching roving SKU. The sizing is ballistic-grade and qualified for phenolic, epoxy and vinyl ester resin matrices used in armor laminates. The fabric is the workhorse glass reinforcement for vehicle armor panels, NIJ Level III/IV body armor backing, helicopter floor armor, blast doors and ballistic helmet shells.
Specifications
| Parameter | Value |
|---|---|
| Sizing | Ballistic-grade, phenolic/epoxy/vinyl-ester-compatible |
| Glass Type | S-2 glass (Mg-Al-silicate, high-strength) |
| Areal Weight | 280 / 480 / 540 g/m² |
| Standard Width | 1000 / 1270 mm |
| Tensile Modulus | ≥85 GPa |
| Moisture Content | ≤0.2% |
| Weave Construction | Satin 5HS / 8HS |
| Ignition Loss (LOI) | 0.6–1.0% |
| Single-Filament Tensile Strength | ≥4500 MPa |
Applications
FAQ
Thinner cloth (280 g/m²) is used for contoured armor laminates where many plies are stacked and individual ply drape matters — helmet shells, curved vehicle panels, helicopter floor armor backing. Mid-weight (480 g/m²) is the workhorse for flat or mildly curved vehicle armor panels and NIJ Level III/IV soft armor backing where total panel build is moderate. Heavy cloth (540 g/m²) is used in thick monolithic armor laminates and blast doors where total areal weight of the panel dominates ply count and lamination cost. Final selection depends on the ballistic threat level, total panel thickness target and matrix resin volume.
Direct Contact
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