Industrial electrical insulating sheets are rigid or semi-rigid laminates made from thermoset resins (e.g., phenolic, epoxy) reinforced with cellulose, cotton, or fiberglass. They provide reliable electrical isolation, mechanical support, and arc resistance in high-voltage components such as switchgear, transformers, busbar supports, and control panels.
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Product Name |
Industrial Electrical Insulating Sheets |
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Certification |
ISO9001,IATF16949,ISO, REACH, RoHS |
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Hardness |
30~90 Sh-A |
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HS Code |
4016910000 |
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Trademark |
OEM, ODM |
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Production Capacity |
1000000PCS |
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Origin |
China |
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Type |
Vibration Damping |
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Transport Package |
Poly Bag, Carton; as Per Customer's Requirement |
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Specification |
Customized |
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Working Temperature |
-50~+240Degrees |
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Material |
NR/BR/NBR/SBR/IIR/IR/FPM/MVQ |
Features
High Dielectric Strength
Withstands up to 50 kV/mm-ensuring safe operation in medium-voltage applications without breakdown or tracking.
Arc & Flame Resistant
UL 94 V-0 rated; self-extinguishing and resistant to surface arcing under fault conditions.
Thermal Stability
Continuous use up to +130°C (Class B); some grades rated to +180°C (Class H) for demanding environments.
Mechanical Rigidity
High flexural strength (>150 MPa) maintains dimensional stability under bolted loads and thermal cycling.
Moisture & Chemical Resistant
Low water absorption (<2%) and resistance to oils, coolants, and cleaning solvents
Company Profile
Tianjin Ruidi International Trade Co., Ltd. (est. 1 987) is an ISO 9001-certified manufacturer of engineered rubber and polymer components. We supply custom sealing, damping, and insulating solutions to global OEMs in HVAC, automotive, industrial machinery, and power systems-supported by in-house compounding, precision molding, and export experience across 15+ countries.
Factory Workshop
Production Process
Our Equipment
Quality Management System
Certificate
Why Choose Us
Certified Compliance
Full documentation for ISO 9001, RoHS, REACH, and UL 94. Test reports available for dielectric strength, CTI, and flammability.
Precision Tolerances
Thickness held to ±0.1 mm on standard grades
Custom Capability
Cut-to-size parts, CNC machining, hole punching, and labeling per drawing (DXF/PDF accepted).
Procurement Services
Standard Sizes: Sheets from 1,000×2,000 mm to 1,220×2,440 mm; thicknesses 2–30 mm.
Packaging: PE film wrap → wooden pallets with edge protection; export-compliant fumigation-free.
MOQ: 1 sheet (stock grades); 50 m² for custom thickness/material.
Lead Time: 7 days for stock; 15–20 days for custom orders.
Logistics: FOB Tianjin / CIF / DDP. Full export docs: COO, MSDS, test certificates, packing list.
Samples: Free A4-sized samples for qualification (freight collect).
FAQ
Do you supply GPO-3 (epoxy glass) sheets?
Yes-UL-listed GPO-3 (Grade FR4/G10 equivalent) available in white, thickness 3–25 mm, with CTI >600V.
What's the comparative tracking index (CTI) of your phenolic sheets?
CE-grade (cotton-reinforced): CTI ≈ 175V; XXXP (paper-reinforced): CTI ≈ 100V. GPO-3: CTI >600V.
Can you machine complex shapes (e.g., slots, arcs)?
Yes-CNC routing, punching, and drilling available. Tolerance: ±0.2 mm.
Are your sheets suitable for outdoor switchgear?
Standard grades are for indoor use. For outdoor/humid environments, we recommend GPO-3 or silicone-coated variants.
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