Web Menu

Product Search

Language

Share

Custom Epoxy Resin Glassfiber Insulation Board
Home / Product / Prepreg / Epoxy Resin Glassfiber Insulation Board
  • Epoxy Resin Glassfiber Insulation Board
  • Epoxy Resin Glassfiber Insulation Board
  • Epoxy Resin Glassfiber Insulation Board
  • Epoxy Resin Glassfiber Insulation Board

Epoxy Resin Glassfiber Insulation Board

Contact Us
PREV：No previous productNEXT：No next product
Parameter
FR-4 / G11 SERIES
Epoxy Resin Glassfiber Insulation Board
Continuous E-glass fabric layers impregnated with brominated epoxy resin, compression molded at 160°C and 14 MPa. Dielectric strength 20–28 kV/mm (ASTM D149), water absorption ≤0.15% after 24 hours immersion. Operating temperature class F (155°C) with UL 94 V-0 flammability rating. Thickness range 0.3 mm to 50 mm, available in natural green, white, yellow, and black for electrical insulation and structural mounting.
Thermal classF (155°C)
UL flammability94 V-0
Dielectric20–28 kV/mm
▸ Technical advantages
  • Arc resistance: 180+ seconds without tracking (ASTM D495), specified for high-voltage switchgear and contactors.
  • Low dissipation factor: Tan δ 0.015–0.02 at 1 MHz, maintains signal integrity in high-frequency PCB applications.
  • Machining stability: Burr-free drilling with carbide tools; delamination controlled at hole diameters ≥0.8 mm.
  • Moisture resistance: Insulation resistance retention >95% after 96 hours at 95% RH.
▸ Mechanical & electrical data
Flexural strength (lengthwise)350 – 450 MPa
Tensile strength280 – 340 MPa
Compressive strength350 – 420 MPa
Volume resistivity10⁷ – 10⁸ MΩ·cm
CTI (comparative tracking)175 – 200 V (PLC 3)
⎯
Dimensional tolerances
0.5 – 1.6 mm ±0.10 mm
1.6 – 3.0 mm ±0.15 mm
3.0 – 6.0 mm ±0.20 mm
Length/width ≤1000 mm ±2.0 mm
⎯
Thermal & chemical
  • Continuous service: 130°C – 155°C
  • Thermal conductivity: 0.25–0.35 W/(m·K)
  • Chemical resistance: acetone, ethanol, mineral oils
  • Avoid: concentrated sulfuric acid
⎯
Processing parameters
  • Shearing ≤3 mm thickness
  • Drilling feed: 0.05–0.10 mm/rev
  • Spindle speed: 20k–40k RPM
  • Preheating at 80°C for punching >2 mm
◆ Application fields (certified per IEC 60893, NEMA LI-1)
Switchgear barriers Busbar supports PCB test fixtures Transformer spacers Motor slot wedges Arc chute plates Insulating washers
RoHS compliant · REACH SVHC free · Halogen-free grade available (IEC 61249-2-21)
Storage & handling
▸ Keep flat on pallets with edge support. Maximum stack height 800 mm to prevent warpage.
▸ Humidity range: 40% – 70% RH. Prolonged exposure >80% RH may increase water absorption above 0.3%.
▸ Avoid direct contact with copper or bare steel surfaces during long-term storage (oxidation risk).
Common questions & notes
Max operating voltage? 2.5 kV per mm thickness for AC (60% derating for DC).
Post-forming capability? No thermoforming after curing; pre-impregnated sheets only.
Outgassing in vacuum? TML 0.45%, CVCM 0.08% — suitable for vacuum chambers.
Warpage control? Annealing at 120°C for 2 hours reduces residual stress after machining.
ⓘ Certification options: MIL-I-24768, GB/T 1303.1, UL recognized (E number available). Batch traceability included. Mechanical values based on 1.6 mm thickness, longitudinal direction.
Related Products
About Us
Jiangyin Dongli New Materials Technology Co., Ltd.
Founded in 2018, Jiangyin Dongli New Materials Technology Co., Ltd. specializes in the comprehensive development and manufacturing of high-performance fiber composite materials. We are China Epoxy Resin Glassfiber Insulation Board Manufacturers and Custom Epoxy Resin Glassfiber Insulation Board Factory. Located in a 32,000-square-meter industrial complex, the company features precision-controlled production environments, including climate-regulated workshops and 100,000-grade purification zones.
As a one-stop factory with full process control, we integrate material innovation with engineering expertise to serve industries such as aerospace, automotive and sports equipment development. Our capabilities include the R&D and production of high-performance fiber fabrics through weaving and prepreg processes, as well as composite products utilizing autoclave, RTM, RMCP, PCM, WCM, and spraying technologies.
Certificate Of Honor
News
Get In Touch