Instead of Fiberglass Cloth 7628! 200gsm - 260gsm Silane Fiberglass Fabric for Insulation Laminates & Heat Insulation Application

1. Basic Material Properties

• Fiber Type: Typically E-glass (electrical grade), which offers high electrical resistivity, good mechanical strength, and thermal stability.

• Weave Pattern: Mostly plain weave, providing balanced strength, low elongation, and a smooth surface ideal for lamination or coating.

• Thickness range: approx. 0.2 – 0.35 mm (depending on exact weight and finish).

• Continuous operating temperature (fabric only): up to 550°C.

• Melting point: approx. 680–700°C.

2. Why 200–260 gsm for Insulation & Laminates?

This weight range is considered light-to-mid weight and offers a good balance between:

• Mechanical strength (tensile and tear resistance)

• Flexibility (easily wraps around pipes, ducts, or irregular surfaces)

• Resin absorption (for laminates)

• Cost efficiency (lighter than 300+ gsm fabrics, but stronger than 100 gsm)

3. Key Applications

A. Insulation Laminates (with resin)

• Used as reinforcement in epoxy, polyester, or phenolic resin composites.

• Produces rigid electrical insulation boards, GPO-3, FR-4, or industrial laminates.

• Requires silane finish for strong resin-to-glass bonding.

• Provides high dielectric strength, low moisture absorption, and good arc resistance.

B. Heat Insulation Jackets & Covers

• Used as the base fabric for removable insulation blankets (e.g., for valves, turbines, exhaust pipes).

• Often coated or laminated to improve thermal performance (see Section 4).

C. Fire Barriers & Welding Protection

• Can be used as a non-coated heat shield or welding blanket (if treated with high-temperature finish).

• Meets flame resistance standards such as ASTM E84 or EN 13501.

4. Common Finishes & Coatings for Heat Applications

The same base fabric can be transformed for different thermal roles:

5. Selection Guide by Application

✅ For rigid insulation laminates (electrical/mechanical)

Choose: 200–260 gsm plain weave, heat-cleaned + silane finish

• Good wettability with epoxy/phenolic resin

• High dielectric strength

• UL 94 V-0 rating available for flame retardancy

✅ For high-temperature removable insulation blankets (up to 260°C)

Choose: 200–260 gsm fabric + silicone rubber coating

• Retains flexibility after repeated heating

• Resists oil, water, and mild chemicals

✅ For radiant heat reflection + moisture barrier (≤150°C)

Choose: 200–260 gsm + aluminum foil lamination (foil on one or both sides)

• Low smoke & toxicity

• Ideal for pipe, duct, and automotive heat shields

✅ For extreme environment (chemical, non-stick, 260°C continuous)

Choose: 260 gsm fabric + PTFE impregnation/coating

• Excellent dielectric properties for high-performance electrical laminates

• Used in food processing, heat sealing, and chemical insulation

✅ For economical, non-coated thermal barriers (up to 550°C)

Choose: 200–260 gsm heat-cleaned fiberglass fabric (no coating)

• Welding curtains, furnace seals, or as a carrier for other insulation layers

6. Important Technical Notes

• Laminating performance: The fabric must be free of starches/sizing (heat-cleaned) to ensure proper resin penetration. A silane coupling agent is essential for high laminate shear strength.

• Thermal conductivity of glass fabric alone: approx. 0.04–0.07 W/m·K (in lamina direction). After lamination with resin or coating, conductivity will rise depending on the matrix material.

• Dielectric strength (for electrical laminates): typically > 10–20 kV/mm when properly impregnated with epoxy.

• If the application requires both heat insulation + structural strength, a multi-layer construction is recommended (e.g., fabric + fiberglass batting + fabric).

7. Summary Table

Now the price of electronic grade fiberglass cloth is too expensive and shortage,so you can choose our new specification (200-255gsm) for instead.

For any inquiry,Please contact +86 13961185092 Jackson Zhao (Wechat & Whatsapp)