A766 Aramid Insulation Paper

A766 Aramid Insulation Paper

UL Certification No.: E509207

Aratech® A766 is a high-temperature, calendered aramid insulation paper designed for Class H and C systems (200 °C). The calendered structure provides superior density, dimensional stability, and uniform electrical properties. With strong resistance to heat, flames, and chemicals, it delivers consistent performance in even the most demanding applications, making it an ideal choice for virtually every known electrical sheet insulation application. A766 is non-toxic and eco-friendly, and passed UL94 V-0 and VTM-0 burning tests.

It can be supplied in slit rolls (depending on the material thickness) or in rolls (≤ 2000mm)

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World-Class Aramid Insulation

Electrical Insulation Aramid Paper Solutions

As electrical systems become more powerful and compact, the demands on insulation intensify. We are the manufacturing partner for the future, producing aramid paper with the enhanced thermal and dielectric properties required for tomorrow's technology. Build safer, more reliable, and more competitive products with our forward-thinking insulation solutions.

Surface microstructure

Surface microstructure

Surface microstructure

High-Strength Aramid Paper for Demanding Insulation Applications.

Aratech® A766 Core Performance Features

The high-pressure calendering process creates a smooth, non-porous surface and a highly uniform internal structure, resulting in exceptional performance.

Superior Dielectric Strength

Offers a robust insulation barrier with a dielectric strength typically exceeding 17 kV/mm, safeguarding equipment from high-voltage stress and electrical breakdown.

Exceptional thermal stability

Engineered for continuous operation at 220°C, this paper maintains its full integrity for over a decade, ensuring reliability in Class H and C systems.

Superior Mechanical Toughness

Features high tensile and tear strength, providing excellent resistance to the physical stresses of automated winding and long-term operational vibration

Excellent Dimensional Stability

Exhibits minimal shrinkage or expansion even under extreme thermal cycling, maintaining precise insulation gaps and structural integrity over its entire service life.

Broad chemical compatibility

Offers excellent resistance to acids and alkalis, and fully compatible with all common industrial varnishes, resins, adhesives, and transformer fluids for seamless system integration.

outstanding Flame Retardancy

Non-melting, UL 94V-0 rated; Limiting Oxygen Index above the threshold for combustion in air at elevated temperatures. Offers safe insulation under elevated temperature and fire-risk environments

Where It Works

Main Application Areas

A766 is suitable for a full range of applications requiring sheet-type electrical insulation materials, offering strong overload resistance. It can be used in traction transformers, mining transformers, explosion-proof transformers, power transformers, reactors, and rectifiers for inter-turn, inter-layer, and end insulation. It is also applicable to traction motors, hydroelectric motors, wind power motors, mining and metallurgical motors, new energy vehicle drive motors, as well as generators operating under demanding electrical and thermal conditions

Dry-Type & Liquid-Immersed Transformers

Layer Insulation, Turn-to-Turn Insulation, Core Insulation, Phase Barriers, Lead and Tap Wire Wrapping.

Motors & Generators (Rotating Electrical Machines)

Slot Liners, Phase Insulation & Barriers, Slot Wedges & Closures, Turn Insulation in Form-Wound Coils.

Other High-Stress Electrical Applications

Chokes, Ballasts, and Reactors. Switchgear & Power Supplies, Printed Circuit Board (PCB) Insulation

Technical Data Snapshot

Items	Unit	TypicalValue								TestMethods
NominalThickness	mm	0.05	0.08	0.13	0.18	0.22	0.25	0.3	0.38	/
NominalThickness	mil	2	3	5	7	8.5	10	12	15	/
TypicalThickness	mm	0.059	0.081	0.134	0.183	0.225	0.268	0.323	0.404	GB/T451.3
BasisWeight	g/m²	41	64	117	168	216	257	311	388	GB/T451.2
Density	g/m³	0.7	0.79	0.87	0.92	0.96	0.96	0.96	0.96	GB/T451.3
DielectricStrength	kV/mm	17	21	23	25	28	24	22	22	GB/T1408.1
DielectricConstant	—	1.6	1.6	2.3	2.5	2.6	2.8	2.9	2.9	GB/T1409
Dielectric Loss Factor	X 10⁻³	4	5	6	6	6	6	8	8	GB/T1409
TensileStrength	MD (N/cm)	38	68	138	225	280	320	360	446	GB/T12914
TensileStrength	CD (N/cm)	19	39	69	115	140	165	183	230	GB/T12914
Elongation	MD (%)	6	7.5	11	11	12	13	10	11	GB/T12914
Elongation	CD (%)	5	6.5	9	9	9	10	7	9	GB/T12914
ElmendorfTearStr.	MD.(N)	0.7	0.95	2	3.1	3.6	4.5	5.7	7.5	GB/T455
ElmendorfTearStr.	CD (N)	1.3	1.7	3.5	5.3	6.6	8.5	10.7	14	GB/T455

Notes:

MD: Longitudinal direction
CD: Horizontal direction
Fast boost mode with φ6mm cylindrical electrode.
The test frequency is 50Hz.
The data in the sheet are typical and can not be used as the technical specification. Unless otherwise stated, all data were measured under “Standard Conditions” (with the temperature of 23℃ and the relative humidity of 50% RH).

Global Leader in Paper-Based Electrical Insulation

Why Choose Us

Partnering with Times Huaxian means more than sourcing reliable materials—it means securing a future-ready supply chain and accessing flexible solutions. We combine industrial scale with scientific rigor to support global distributors, OEMs, and service providers in building reliable electrical futures.

Certified Reliability

By using advanced online quality monitoring, we eliminate the human error and variability inherent in older production methods, ensuring that every roll performs exactly as specified.

Competitive Value

By partnering with us, you can integrate world-class, UL-certified insulation into your products at a significantly more competitive price point, directly improving your bill of materials (BOM)

Reliable Global Supply

we offer a more direct, transparent, and stable supply of critical materials. This allows you to reduce costly buffer inventory and insulate your operations from global supply shocks.