FR4 Epoxy Fiberglass Sheet

https://www.jc-insulant.com/fr4-epoxy-fiberglass-sheet.html

FR4 epoxy fiberglass sheet is a glass-fiber-reinforced epoxy laminate widely used where mechanical strength, electrical insulation and dimensional stability are required. By combining fiberglass reinforcement with epoxy resin, this material provides a rigid engineering substrate that can also be cut and machined into customized components.

We supply FR4 fiberglass sheets, 3240 epoxy boards, anti-static fiberglass boards and flame-retardant fiberglass materials directly from the factory. Standard sheet supply and customized processing are both available, with thickness options from approximately 0.2 mm to 150 mm and additional thicknesses up to 200 mm available according to project requirements.

Customers can provide drawings, dimensions, thickness requirements or color references for customized production. CNC cutting, drilling, chamfering, slotting and engraving are available for applications requiring finished FR4 components rather than standard sheets.

FR4 Fiberglass Board Material for Custom Manufacturing

The FR4 fiberglass sheet is manufactured from fiberglass reinforcement and epoxy resin to create a rigid composite material suitable for electrical, mechanical and industrial components.

The material can be supplied as a standard sheet or processed according to customer drawings. This makes it suitable for buyers who require either raw laminate stock or ready-to-install machined parts.

Typical supply options include:

• FR4 epoxy fiberglass sheets

• 3240 epoxy fiberglass boards

• Flame-retardant fiberglass boards

• Anti-static fiberglass boards

• CNC-machined FR4 components

• Custom-cut insulation plates

• Drawing-based fiberglass parts

Standard sheet dimensions include 1020 × 1220 mm, 1220 × 2440 mm and 1000 × 2000 mm.

Actual material grade, thickness tolerance, color and technical values should be confirmed according to the selected product specification and approved production requirements.

Main Material Characteristics

FR4 epoxy fiberglass laminate is selected for projects that require a combination of structural rigidity and electrical insulation.

The fiberglass reinforcement contributes to the material's mechanical strength, while the epoxy matrix provides a stable composite structure. The resulting board can be processed into plates, brackets, spacers, supports and other engineered components.

The material offers:

• High mechanical strength relative to its weight

• Strong electrical insulation performance

• Good dimensional stability

• Resistance to moisture and corrosion

• Resistance to repeated mechanical stress

• Good machining and cutting characteristics

• Flame-retardant material options

• Multiple thickness and color choices

For electrical insulation applications, the material can be supplied with a UL94-V0 flammability rating according to the applicable material specification.

The actual performance of a finished component depends on the selected grade, thickness, manufacturing process and operating conditions.

Available Thicknesses, Sizes and Colors

We support a broad range of FR4 board thicknesses for different manufacturing requirements.

Standard thickness range: approximately 0.2–150 mm
Additional thickness: up to 200 mm available for selected requirements

Available appearance options include:

• Green

• Black

• Yellow

• Custom colors

Color customization can be discussed for OEM projects based on customer requirements.

Standard sheet formats include:

Standard Sheet Size	Availability
1020 × 1220 mm	Available
1220 × 2440 mm	Available
1000 × 2000 mm	Available

For non-standard dimensions, sheets can be cut according to customer drawings or specified measurements.

Typical Technical Data

The following values represent typical reference data for the supplied fiberglass epoxy material:

Property	Typical Value
Density	2.05–2.10 g/cm³
Flexural Strength	340–480 MPa
Tensile Strength	240–300 MPa
Compressive Strength	≥350 MPa
Dielectric Strength	20–25 kV/mm
Water Absorption	≤0.1%
Working Temperature	-20°C to 130°C
Flammability	UL94-V0

These figures are provided as reference values. The exact technical specification may vary according to material grade, thickness, manufacturing conditions and customer requirements. Project-specific technical data should be confirmed before production.

CNC Machining for FR4 Components

In addition to supplying raw FR4 sheets, we provide customized machining services for customers who need finished fiberglass components.

Processing options include:

• CNC cutting

• Precision drilling

• Hole machining

• Edge chamfering

• Slot machining

• Engraving

• Custom contour cutting

• Drawing-based component production

Customers can send PDF, DWG or STEP drawings for technical evaluation. Dimensions, hole locations, slots, contours and other machining requirements can then be reviewed before production.

Both small-volume orders and larger production batches can be handled according to the project requirements.

FR4 Applications in Industrial Manufacturing

FR4 epoxy fiberglass boards can be processed into components for a variety of industrial and electrical equipment.

Drone and UAV Structural Plates

FR4 sheets can be machined into frame plates and structural components for FPV drones, UAV equipment and other lightweight assemblies where a rigid composite material is required.

Electrical Insulation Components

The material is commonly processed into insulation-related parts such as:

• Motor brackets

• Transformer spacers

• Electrical support plates

• PCB support components

• Insulating plates

• Custom electrical fixtures

Mechanical and Industrial Components

Machined FR4 can also be used for selected tooling fixtures, industrial supports, structural plates and custom mechanical parts where the material specification meets the operating requirements.

Custom CNC-Machined Parts

For buyers with specific component designs, the sheet can be supplied as a starting material for CNC machining. Cutting, drilling, chamfering, slotting and engraving can be completed based on the supplied engineering drawing.

Factory Direct FR4 Sheet Supply

As a material manufacturer and processor, we provide direct factory supply for standard sheets and customized FR4 components.

Our production capability covers material preparation, sheet production, cutting, machining, inspection and order fulfillment. This allows customers to source both standard material and processed parts through one supplier.

For regular products, standard sheets may be available from stock. Simple processing orders for small batches can generally be completed within 3–5 days, subject to material availability, processing requirements and order quantity.

For larger OEM programs, production schedules are confirmed according to the approved specification and order requirements.

Quality Control and Production Experience

With more than 20 years of material manufacturing experience, we have developed production and processing capabilities for fiberglass-reinforced epoxy materials.

Quality inspection is carried out by batch before shipment. Depending on the product and order specification, inspection may cover dimensions, appearance, material characteristics and other agreed requirements.

For customized parts, production follows the customer's approved drawings and technical specifications to maintain consistency between batches.

OEM and Custom FR4 Solutions

Customized production is available for customers requiring non-standard materials or finished FR4 components.

You can specify:

• Material type

• Board thickness

• Sheet dimensions

• Finished-part dimensions

• Hole patterns

• Slots and cutouts

• Surface processing

• Color

• Quantity

• Packaging requirements

For drawing-based production, please provide the relevant PDF, DWG or STEP file together with any critical tolerances or technical requirements.

Our team can review the drawing and confirm material selection, machining feasibility and production requirements before quotation.

Global B2B Supply

We support bulk purchasing and international shipments for customers in multiple markets, including:

• Europe

• United States

• South America

• Southeast Asia

Whether you require standard FR4 sheets for further processing or CNC-machined fiberglass components ready for assembly, orders can be arranged according to your technical and quantity requirements.

Request an FR4 Fiberglass Sheet Quote

For a quotation, please provide the basic requirements such as sheet size, thickness, quantity, color or engineering drawing.

For customized parts, a PDF, DWG or STEP drawing allows us to evaluate the required machining process more accurately.

Contact us for FR4 material specifications, custom CNC machining, samples and bulk-order quotations.