Custom Die-Cut Formex GK17 GK10 Polypropylene PP Insulation Sheets & Parts
Product Overview
ITW Formex® GK Series is a market-proven flame-retardant polypropylene electrical insulation sheet engineered for harsh electronic environments. Featuring superior dielectric strength, an elevated thermal rating (115°C), and non-hygroscopic moisture protection, Formex GK protects sensitive electronics from electrical arcing and environmental hazards.
As an experienced converting specialist, we provide end-to-end custom die-cutting and fabricating solutions for Formex GK—delivering precision insulation parts, barrier cards, and score-and-fold enclosures ready for immediate assembly.
Our Custom Die-Cutting & Converting Services
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Precision Die-Cutting & Laser Cutting: Tailored to complex 2D shapes and tight tolerances per your CAD/DXF drawings.
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Score-and-Fold Fabrication: Excellent living hinge characteristics allow flat-shipped die-cut parts to fold easily into 3D insulating boxes and shields.
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Adhesive Lamination: Optional backing with high-performance acrylic tapes (such as 3M™ 9485PC, 3M™ 467MP, etc.) for easy installation.
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Slitting & Sheeting: Custom roll widths, narrow tapes, and pre-cut flat sheets.
Key Material Advantages
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UL 94 V-0 Flame Retardancy: Meets top global safety standards (UL Recognized File E121855, RoHS, REACH, WEEE).
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High Dielectric Breakdown Voltage: Outstanding dielectric strength (up to 2,200 V/mil @ 0.005") to prevent electrical tracking.
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Non-Hygroscopic (<0.06% Absorption): Maintains reliable insulation performance even in high-humidity conditions.
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UV & Outdoor Weathering Resistance: Selected black grades feature UL f1 ratings for outdoor application durability.
Technical Specifications & Available Thicknesses
| Part Number | Nominal Thickness | Thickness (mm) | Standard Format | Key Application |
| Formex GK-5 | 0.005" | 0.127 mm | Roll / Die-cut | Thin insulating films & wraps |
| Formex GK-10 | 0.010" | 0.250 mm | Roll / Die-cut | Power supply barriers & gaskets |
| Formex GK-17 | 0.017" | 0.430 mm | Roll / Die-cut | EV battery insulation & covers |
| Formex GK-30 | 0.030" | 0.760 mm | Sheet / Die-cut | Heavy-duty structural insulation |
| Formex GK-40 | 0.040" | 1.020 mm | Sheet / Die-cut | High-voltage cabinet shielding |
| Formex GK-62 | 0.062" | 1.570 mm | Sheet / Die-cut | Rigid barrier plates & partitions |
Main Applications
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EV Battery Packs & Energy Storage (ESS): Inter-cell barrier insulation, busbar protection, and battery module covers.
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Power Supplies & Inverters: Primary-to-secondary electrical isolation and heat sink barriers.
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Consumer & Industrial Electronics: Die-cut insulating liners inside TV chassis, computer servers, and home appliances.
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Transformers & Electrical Cabinets: High-voltage spark shields and arc guards.