Industrial Composite Products IEC / IS Compliant
ACC Insulations manufactures a complete range of glass fiber reinforced composite insulation products — engineered for demanding electrical, mechanical, and industrial service conditions. Each product combines superior dielectric strength, mechanical rigidity, and thermal stability to perform reliably where conventional materials fail.
Manufactured in Nashik, Maharashtra, our composites serve OEMs across power equipment, railways, defence, chemical plants, and telecommunications — backed by strict IEC and IS process controls.
What Are Industrial Composite Products?
Industrial composites combine engineering fiber reinforcements — primarily woven or non-woven glass fiber — with thermosetting resin systems such as epoxy, polyester, or phenolic. Cured under controlled heat and pressure, resulting laminates achieve mechanical strength, electrical insulation, thermal stability, and chemical resistance that no single raw material can match.
Compared to metals, ceramics, or paper-based insulation, fiber reinforced polymer (FRP) composites deliver better performance at lower weight, longer service life, and minimal maintenance overhead — making them a preferred choice for power equipment OEMs, EPC contractors, and defence procurement agencies.
Key Properties of Industrial Composite Products
Withstands high-voltage stress — suitable for medium and high-voltage insulation in transformers and switchgear.
Resists transformer oils, industrial acids, and alkalis — maintains properties across harsh chemical environments.
Dimensional and electrical properties remain stable across wide operating temperature ranges.
High flexural and compressive strength — supports structural loading without deformation or creep.
Epoxy glass laminates absorb minimal moisture — preventing degradation of dielectric properties over time.
Machinable to close tolerances — custom profiles, slots, and assemblies per OEM drawings and IS/IEC specs.
Industry-Wise Application Matrix
| Industrial Composite Product Applications by Sector | |
|---|---|
| Electrical & Power | Transformers, switchgear, generators, motors, control panels, bus bar supports, arc barriers |
| Defence | Military vehicles, naval vessels, air force equipment — established applications across all three services |
| Railways & Metro | Coach building panels, traction equipment insulation, rail track components, electrical cubicles |
| Automobile | Instrument panels, parcel trays, flooring, under-bonnet thermal shields, bumper structures |
| Foundries | Match plates, pattern boards — wear-resistant composite tooling |
| Forgings | Precision pattern making with dimensional stability at elevated temperatures |
| Textile Machinery | Picking sticks and shuttle components for high-speed automatic looms |
| Telecommunications | Underground cable covers, joint boxes, FRP telephone booths, enclosure panels |
| Chemical & Process | Pipelines, storage tanks, cryogenic vessel insulation, corrosion-resistant liners |
| Petroleum & Offshore | Offshore structural panels, non-corrosive pipe supports, blast-resistant partitions |
| Construction | Structural doors, flooring panels, cladding, thermal break insulation |
| Atomic Energy | Neutron shielding applications — compliant with radiation-environment requirements |
Types of Industrial Composite Products We Manufacture
Our manufacturing range covers four core composite product families — each available in standard grades and custom-engineered variants:
- Epoxy Glass Fiber Laminates (EPGC/UPGM 203): High dielectric strength sheets and rods for HV insulation in transformers and switchgear. Available in Grade G10, G11, FR4, and custom glass-epoxy formulations.
- Composite Insulation Boards & Sheets: Flat laminated boards for bus bar insulation, barrier boards, press boards, and structural spacers. Custom thicknesses from 1mm to 100mm+.
- Structural FRP Composite Components: Profiles, angles, channels, and flanges manufactured by filament winding or pultrusion — suited for railway and chemical plant structures.
- CNC Machined Composite Insulation Parts: Close-tolerance components machined from composite blanks — press rings, coil clamps, winding formers, and custom OEM parts per technical drawings.
Manufacturing Process
Every ACC Insulations composite product passes through a controlled multi-stage production sequence:
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Resin Impregnation Glass fiber woven fabric passes through calibrated resin baths — epoxy or polyester content controlled by weight ratio to achieve target electrical and mechanical properties.
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Layup & Stacking Pre-impregnated plies stacked in precise orientation — warp, weft, and angle layups engineered for the required isotropy or directionality of the final component.
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Compression Molding / Hot Press Lamination Stacked plies cured under controlled temperature (130–180 °C) and hydraulic pressure — cross-linking resin into a monolithic, void-free laminate.
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CNC Precision Machining Cured laminates milled, drilled, and profiled to ±0.05 mm tolerances on multi-axis CNC machining centers — per OEM drawings or IS/IEC dimensions.
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Quality Testing & Dispatch Each batch tested for dielectric strength, flexural modulus, moisture absorption, and dimensional accuracy before dispatch — with test certificates.
Industrial Composites vs Conventional Insulation Materials
| Property | Glass Fiber Epoxy Composite | Steel / Aluminium | Pressboard / Paper |
|---|---|---|---|
| Dielectric Strength | Excellent | None (conductive) | Moderate |
| Corrosion Resistance | Excellent | Requires coating | Poor |
| Moisture Resistance | High | Low (rust) | Very Low |
| Weight | Low | Heavy | Low |
| CNC Machinability | Excellent | Difficult | Very Limited |
| Service Life | Long | Long (with maintenance) | Short |
Manufacturing Capabilities at ACC Insulations
Our Nashik facility operates advanced composite production infrastructure:
- Resin impregnation lines — controlled epoxy and polyester bath systems with real-time resin-content monitoring
- Multi-platen hydraulic hot-press laminators — capable of producing large-format laminate sheets and thick-section boards
- Multi-axis CNC machining centers — precision milling, drilling, and contouring to OEM tolerances
- In-house quality testing laboratory — dielectric strength, flexural, compressive, moisture absorption, and dimensional inspection equipment
Strict process controls at every production stage deliver uniform material properties and consistent batch-to-batch quality.
Quality Standards & Compliance
All industrial composite insulation products manufactured at ACC Insulations comply with:
- IEC 60893 — Industrial rigid laminated sheets based on thermosetting resins for electrical purposes
- IEC 60371 — Insulating materials based on mica
- IS 2036 — Indian Standard for glass fabric reinforced plastic products
- OEM-specific technical specifications — custom grade qualification on request
Products ship with dimensional inspection reports and dielectric test certificates. Third-party lab testing available on request.
Why Choose ACC Insulations for Industrial Composite Products
- Dedicated composite manufacturing expertise — years of focused production experience in glass fiber reinforced laminates and FRP components
- Full OEM customization — raw composite blanks to fully machined and finished insulation assemblies per customer drawings
- IEC and IS compliant production — stringent process controls and documented test records
- Pan-India supply capability — serving OEMs across Maharashtra, Gujarat, Tamil Nadu, Karnataka, and beyond
- Responsive technical support — material selection guidance, grade recommendations, and application engineering assistance
Engineering Tools Suite
Calculate precise dielectric margins, load-bearing capacities, and environmental tolerances for industrial composite insulation applications using our interactive tools.
Frequently Asked Questions
Yes. Glass fiber reinforced epoxy laminates deliver high dielectric strength and arc resistance — qualifying them for medium and high-voltage electrical insulation in transformers, switchgear, and control panels rated up to several kV.
Common resin systems include epoxy, polyester, and phenolic resins. Epoxy-based glass fiber composites (EPGC grades) prevail for high dielectric strength, thermal stability up to Class F/H, and low moisture absorption — making them the preferred choice for power equipment insulation.
Yes. Composite sheets and boards can be CNC milled, drilled, and profiled to ±0.05 mm tolerances — producing custom insulation components per OEM technical drawings and IS/IEC specifications. Components supplied with dimensional inspection reports.
Yes. Epoxy glass fiber composites exhibit low moisture absorption (typically <0.5% by weight) and excellent resistance to transformer oils, mineral acids, and industrial solvents — ensuring stable electrical properties and long operational service life.
ACC Insulations supplies composite insulation products to OEMs in electrical power, transformers, switchgear, railways, defence, automobile, chemical and process, petroleum and offshore, telecommunications, atomic energy, and construction sectors — across Maharashtra and pan-India.
Key standards include IEC 60893 (industrial laminated sheets for electrical purposes), IS 2036 (glass fiber reinforced plastic products), and relevant OEM-specific grade qualifications. Test certificates for dielectric strength and mechanical properties provided on dispatch.
