Explore Range of Aramid Paper for
Motors
High-performance Metastar® aramid paper & electrical insulation systems. Class H (220°C) certified. Trusted by OEM engineers across India.
Complete Aramid Paper Range
We supply the full spectrum of Metastar® aramid papers and flexible laminates — from calendered electrical insulation to pressboards and composites.
Crepe Paper & Tubes
Flexible Creped Aramid & Tubes
Creped aramid papers and tubes designed for wire wrapping, lead outlets, and insulating irregular shapes. Provides high flexibility and conforms to complex geometries under winding stress.
YT594
Aramid Pressboard — High Density
Heavy structural pressboard for large power transformers and GSU applications. Replaces cellulosic pressboard in Class H systems. Engineered for long-term thermal stability and mechanical strength in heavy-duty Class H systems.
YT518 / YT568
Mica Aramid Paper (50% Fiber)
Calendered aramid paper containing 50% mica particles. Excellent thermal stability and electrical strength — prevents premature failure under partial discharge, extreme temperature and electrical stress.
YT822A / YT822B
Aviation-Grade Honeycomb Paper
50% lighter than aluminium honeycomb with 9x the specific strength of steel. Dimensional stability from -80°C to 200°C. Radiation resistant. Used in aircraft, satellite and aerospace composite structures.
YT822 / YT836
Industrial & Para-Aramid Honeycomb
Industrial-grade aramid honeycomb for rail transit interior structures. YT836 para-aramid for highest-performance aerospace applications. Used in train floors, walls, ceilings, luggage racks.
YT-CM-A005 / YT-CM
Mica Tape & Mica Aramid Paper
Mica-aramid tape (0.12 mm) and mica aramid paper (5% aramid fiber content) for railway traction motor insulation. Provides PD resistance under converter-generated voltage transients.
Tie Cords & Sleeving
Aramid Tie Cords & Sleeving
Meta and para-aramid tie cords (2-strand and 3-strand) for coil binding. Woven and braided aramid sleeving for wire protection and motor end-winding insulation at 220°C.
AM
Aramid / Polyester Film (1-sided)
Polyester film (PET) bonded to one side of Metastar® aramid paper. Offers one shiny film surface and one matte aramid surface. Used in motor slot insulation and applications where a single-sided dielectric barrier is sufficient. Class F.
APA
Aramid - Polyester - Aramid (3-layer)
High-performance 3-layer laminate featuring polyester film (PET) sandwiched between two layers of Metastar® aramid paper. Provides complete dielectric barrier with excellent mechanical flexibility. Standard Class F grade for AC motor manufacturing and transformer slot insulation.
AH
Aramid / Polyimide Film (1-sided)
Polyimide film (Kapton) bonded to one side of Metastar® aramid paper. Designed for single-sided barrier protection in high-temperature Class H systems. Combines the excellent chemical and thermal resistance of polyimide with aramid mechanical toughness.
AHA
Aramid - Polyimide - Aramid (3-layer)
Premium high-temperature 3-layer laminate featuring Kapton polyimide film sandwiched between two layers of Metastar® aramid paper. Engineered for critical Class H and Class N applications where polyester laminates cannot survive. Retains high dielectric and mechanical strength under continuous high-temperature operating conditions.
Metastar® Grade Selection Matrix
A technical guide to matching the correct Metastar® aramid paper grade and laminate with your specific electrical insulation requirements.
| Grade | Type & Structure | Oil-Filled Transformer |
Dry-Type Transformer |
Motors & Generators |
Railway Traction Motor |
EV Motor & Powertrain |
High Voltage Motor |
|---|---|---|---|---|---|---|---|
| YT510 | Calendered Paper (High dielectric barrier, high mechanical strength) | — | — | ||||
| YT511 | Uncalendered Paper (Porous open structure, high resin absorption) | — | — | — | — | — | |
| YT516 | Low-Halogen Paper (Eco-friendly battery & electronic barrier) | — | — | — | — | ||
| YT56 | Semi-Calendered Paper (Balanced thickness & flexibility) | — | — | — | — | — | |
| YT564 | Lamination Grade (Optimized adhesive & tensile strength for backings) | — | — | — | |||
| YT510D / YT56D | Diamond Aramid DDP (Epoxy dot coated, high bond strength) | — | — | — | — | — | |
| YT510C / YT511C | Crepe Paper & Crepe Tube (Expandable, insulation wrapping) | — | — | — | — | — | |
| YT592 - YT594 | Aramid Pressboard (Thick rigid structural boards) | — | — | — | — | — | |
| YM / YH / YMY / YHY | Flexible Laminates (Class H / Class F multi-layer composites) | — | — | — | |||
| YT-CM-A005 | Aramid Mica Tape (Excellent heat resistance, mechanical stress) | — | — | — | — | — | |
| YT-CM / YT518 / YT568 | Mica Aramid Paper (Hybrid high dielectric barriers) | — | — | — | — | ||
| YT7540 | Aramid Felt (Shock absorption, thermal protection) | — | — | — | — | — | |
| YT613 / YT616 / YT623 / YT626 | Aramid Accessories (Tie Cords & Sleevings for coil phase safety) | — | — | — | — | — |
Metastar® YT510 Technical Datasheet
Detailed physical, mechanical, electrical, and thermal properties of Metastar® YT510 calendered aramid paper.
Select a thickness
Drag the slider or click a label below to highlight the gauge across the data tables and read its headline specs.
Nominal thickness
Table 1 — typical values. AC rapid-rise dielectric strength withstood immediately at 50 Hz. Temperature and humidity have only a minor effect (see charts and Table 2).
1) GB/T1408.1-2006, Ø25 mm top / Ø75 mm bottom electrode · 2) GB/T1409-2006, Ø50 mm electrode, 50 Hz
Measured on 0.08 mm (3 mil) paper. Temperature has only a minor effect on electrical properties and resistivity.
Electric properties vs temperature
% of room-temperature value · Figure 1-a
Resistivity vs temperature
Surface & volume resistivity (log scale) · Figure 1-b
Table 2 — relative humidity has only a minor effect on electrical parameters. Keep paper sealed in its polyethylene wrapper until use to maintain uniform moisture content.
Table 3 — compact structure, smooth surface and stable dimensions. MD = machine direction, CD = cross direction.
Rising temperature and humidity improve elongation, tear strength and toughness while tensile strength decreases slightly — the two effects behave similarly.
vs temperature
% of room-temperature value · Figure 2
vs humidity
% of bone-dry value · Figure 3
UL-rated 220 °C insulation. Useful life follows the Arrhenius relation lg t = 5474.21/(T+273) − 6.87, giving an RTI of 215.4 °C (≈20,000 h to 50% MD strength).
Useful life vs temperature
Hours to 50% initial MD strength (log scale) · Figure 4 · 0.05 mm
Thermal conductivity vs temperature
mW/m·K · Figure 5 · 0.25 mm (10 mil)
A stable molecular structure gives excellent corrosion resistance and broad compatibility with electrical varnishes, adhesives, transformer fluids, lubricating oils and refrigerants.
Dimensional stability in solvents & fluids
% of original dimension over 70 days, 0.08 mm paper · representative of Figure 6 (a). Dimensions hold within ~97–100% across all media.
Precision-engineered
in India
Stocked and distributed from our Mumbai facility – pan-India delivery for transformer, motor, and EV manufacturers.
Technical Datasheet
Get complete mechanical, electrical, and thermal properties of Yantai Metastar® YT510 calendered paper.
Critical Applications
Power & Distribution Transformers
AC/DC Motors & Generators
EV Traction Motors
Railway Traction Systems
Renewable Energy
Aerospace & High-Voltage
Industry-Proven B2B Reliability
INSOURCES' high-performance insulation solutions are trusted by leading electrical OEMs, power grid utilities, and manufacturers globally.
INSOURCES Insulation
INSOURCES EXIM PVT LTD is a strategic partner for Yantai Metastar® aramid papers and a leading distributor of high-performance B2B electrical insulation systems in India since 1972. We supply ISO 9001:2015 certified, UL-rated Class H and Class C materials engineered for transformers, EV motors, rail traction generators, and heavy industrial machinery. Our long-term client partnerships are built on direct manufacturer traceability, strict B2B quality control, and decades of engineering expertise.
Our Core Product Range
More than a distributor.
A supply chain partner since 1972.
Technical Grade Selection Support
Calendered vs. uncalendered, paper vs. pressboard, laminate vs. composite — our team has specified aramid insulation materials for transformer, motor and generator applications since 1972. We help you get it right the first time.
India-Wide Distribution
Maintained inventory ensures consistent availability for repeat orders. Sales team coverage across West, South, East India and exports. Pan-India freight. Export documentation handled for buyers in Southeast Asia, Middle East and Africa.
Complete Insulation System
Aramid paper is one component. We also supply DMD/FPF laminates, Kapton polyimide films, insulation pressboard, Elantas impregnation varnishes, fiberglass sleeving and kraft papers — your full system from one purchase order.
Specify your requirement.
Get a quote today.
Tell us your product, grade, thickness, and application — or describe your transformer or motor requirement. Our technical team will recommend and quote the correct material within 2 hours.
100% Genuine Aramid Materials
Authorized distributor since 1972
Quick Turnaround
Quotes processed in less than 2 hours
Pan-India & Global Delivery
Secure packaging and rapid dispatch from Mumbai