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.

Explore Range
Electric Motors
Electric Motors
Class H · 220°C Stator Insulation
Power Transformers
Power Transformers
High Dielectric Barrier Insulation
EV Traction
EV Traction
High Tensile & Thermal Strength
Conductors
Conductors
Aramid Tape Conductor Wrapping
Rail Traction
Rail Traction
Heavy Duty Vibration Resistant
Wind Turbines
Wind Turbines
Extreme Weather Endurance
Aerospace Systems
Aerospace Systems
Ultra-lightweight High Dielectric
Flexible Laminates
Flexible Laminates
Aramid Film Composites YMY/YHY
Product Catalog

Complete Aramid Paper Range

We supply the full spectrum of Metastar® aramid papers and flexible laminates — from calendered electrical insulation to pressboards and composites.

Metastar YT510 Calendered Aramid Paper Best Seller
Metastar®

YT510

Calendered Aramid Paper

High-density calendered aramid paper with high dielectric strength, mechanical toughness, and thermal stability. The industry standard for Class H motor slot liner and transformer insulation.

Thickness: 0.05 – 0.76 mm  •  Class H  •  UL 94V-0
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Metastar YT511 Uncalendered Aramid Paper
Metastar®

YT511

Uncalendered Aramid Paper

Uncalendered aramid paper with high porosity and excellent resin/varnish absorption. Ideal for composite laminations and applications requiring complete impregnation.

Thickness: 0.13 – 0.58 mm  •  Class H  •  High Resin Abs.
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Metastar YT516 Calendered Aramid Paper
Metastar®

YT516

Low-Halogen Calendered Paper

Environmentally friendly calendered aramid paper with low halogen content. Designed specifically for electronic insulation, lithium battery barriers, and eco-conscious applications.

Thickness: 0.05 – 0.38 mm  •  Low Halogen  •  UL 94V-0
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Metastar YT56 Semi-Calendered Aramid Paper
Metastar®

YT56

Semi-Calendered Aramid Paper

Semi-calendered aramid paper offering a balance of flexibility, varnish absorption, and mechanical stiffness. Perfect for electrical barrier shielding and phase insulation.

Density: 0.65 – 0.74 g/cm³  •  Class H
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Metastar YT564 Composite Grade Aramid Paper
Metastar®

YT564

Lamination-Grade Composite Paper

Calendered aramid paper engineered with optimized surface properties for bonding. Specially designed as the base paper for manufacturing film composite laminates (e.g. YM, YMY, YH, YHY).

High Surface Adhesion  •  Thin Gauges Available
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Metastar Aramid Crepe Paper & Tubes
Metastar®

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.

Custom Dimensions  •  High Elongation  •  Class H
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Metastar YT592 YT593 YT594 aramid pressboard sheets
Metastar®

YT592

Aramid Pressboard — Low Density

100% aramid fiber pressboard with excellent heat resistance, chemical stability and electrical strength. Good performance in both air and oil. Used for transformer spacers and end rings.

Thickness: 1.6, 3.2 mm  •  Sheet: 1600 * 2000 mm
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Metastar®

YT593

Aramid Pressboard — Medium Density

Medium-density structural pressboard for transformer core clamps, winding supports and inter-winding barriers. Ideal for high-reliability structural insulation in power transformer applications.

Thickness: 1.0 – 6.0 mm  •  High Rigidity
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Metastar®

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.

Thickness: 1.0 – 9.6 mm  •  10 Standard Sizes
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Metastar YT518 Mica-Aramid Hybrid Paper
Metastar® — Hybrid

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.

YT518: 0.08 – 0.38 mm  •  YT568: 0.05, 0.08 mm
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Metastar YT822A Aviation Grade Aramid Honeycomb
Metastar® — Honeycomb

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.

Paper Thickness: 0.04, 0.05, 0.08, 0.10 mm
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Metastar YT822 Industrial Honeycomb Paper
Metastar® — Honeycomb

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.

Paper Thickness: 0.04, 0.05, 0.08, 0.10 mm
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YT-CM
Metastar® — Mica Tape

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.

Tape: 0.12 mm  •  Mica Paper: 0.06 – 0.09 mm
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YT7540
Metastar®

YT7540

Aramid Felt

Needled aramid felt for thermal barrier, cushioning and end-winding support. Compressible under winding tension, resilient at 220°C — used where rigid sheet paper is too stiff.

Thickness: 2.5 mm, 5.0 mm  •  Highly Compressible
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Cords & Sleeving
Metastar®

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.

Cords OD: 1.0 – 4.0 mm  •  Sleeving ID: 2.5, 10 mm
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Metastar® Flexible Laminate AM
Metastar® — Laminate

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.

Thickness: 0.10 – 0.38 mm
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Metastar® Flexible Laminate APA
Metastar® — Laminate

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.

Thickness: 0.15 – 0.48 mm  •  Class F
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Metastar® Flexible Laminate AH
Metastar® — Laminate

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.

Thickness: 0.10 – 0.38 mm  •  Class H
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Metastar® Flexible Laminate AHA
Metastar® — Laminate

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.

Thickness: 0.15 – 0.48 mm  •  Class H  •  EV-rated
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B2B Material Portal

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) — — — —
—
Primary Engineering Choice
Secondary Choice / Composite Layer
— Not Applicable
Technical Data

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

10 mil / 0.25 mm
2 mil 3 mil 5 mil 7 mil 10 mil 12 mil 15 mil 20 mil 30 mil

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.

> 28%
Limiting Oxygen Index — will not support combustion in ambient air
V-0 / VTM-0
UL94 flammability certification
220 °C
UL thermal classification
High-radiation
Outstanding radiation resistance for critical control gear

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.

Manufacturing

Precision-engineered
in India

Stocked and distributed from our Mumbai facility – pan-India delivery for transformer, motor, and EV manufacturers.

YT510 Aramid Paper

Technical Datasheet

Thermal Class: Class H (220°C)
Dielectric Strength: ≥ 30 kV/mm
Thickness Range: 0.05 – 0.76 mm

Get complete mechanical, electrical, and thermal properties of Yantai Metastar® YT510 calendered paper.

Where aramid paper performs

Critical Applications

Power & Distribution Transformers

Power & Distribution Transformers

YT510 YT56 YT592-594
AC/DC Motors & Generators

AC/DC Motors & Generators

YT510 YMY YH
EV Traction Motors

EV Traction Motors

YMY YHY YT510
Railway Traction Systems

Railway Traction Systems

YT518 YT-CM YT822
Renewable Energy

Renewable Energy

YT510 YT56 YMY
Aerospace & High-Voltage

Aerospace & High-Voltage

YT822A YT836 YT518
Trusted Partner

Industry-Proven B2B Reliability

Harnawa's high-performance insulation solutions are trusted by leading electrical OEMs, power grid utilities, and manufacturers globally.

50+
Grid Utilities Supplied
20+ Years
Avg. Client Partnership
100%
Manufacturer Traceable
Class H
UL-Certified 220°C
About Us

Harnawa Insulations

Harnawa Insulations 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

Laminated Insulation Paper Composites
Fiberglass Insulation Sleeves
Insulation Pressboard / Papers
Fiberglass Insulated Cables (PTFE / Silicone)
Insulation Tapes High Temperature
Insulation Sheets and Components
Elantas Varnishes and Thinner
Fiberglass Yarn
View Full Product Range
WHY HARNAWA

More than a distributor.
A supply chain partner since 1972.

01

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.

02

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.

03

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.

GSTIN 27AAGCH7388K1ZV ISO 9001:2015 CERTIFIED AUTHORISED METASTAR® DISTRIBUTOR EST. 1972 · MUMBAI, INDIA
Get a Quote

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

Call / WhatsApp
+91 88798 11876 +91 74004 57843 +91 72766 71876
Email Addresses
enquiry@harnawainc.com sales@harnawainc.com
FAQ

Frequently Asked Questions

Calendered aramid paper (such as Metastar® YT510) undergoes a high-temperature rolling process that compacts the fibers, giving it high density, high dielectric strength, and excellent mechanical toughness. Uncalendered paper (such as Metastar® YT511) is uncompacted, making it porous, light, and highly absorbent. It is ideal for complete resin/varnish impregnation and laminate composite backings.

Yes, Harnawa Insulations Pvt. Ltd. is a strategic partner for Yantai Metastar Special Paper Co., Ltd. in India. All Metastar products we supply come with full manufacturer traceability and quality certificates.

Our aramid papers are available from 0.05 mm (2 mil) to 0.76 mm (30 mil) in 10–12 standard grades. Custom thicknesses can be sourced on request. Aramid paperboard (YT592/593/594) is available in thicker gauges for structural applications.

Yes. We offer custom slitting, sheeting, die-cutting, punching, and adhesive-backed tape conversion. Share your drawings or specifications and we'll provide a quote for processed aramid paper products.

Metastar products carry UL certification, ISO 9001, AS9100 (Aerospace), IATF 16949 (Automotive) certifications and are RoHS & REACH compliant. Harnawa is ISO 9001:2015 certified.

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