TDS - Aramid Insulation Paper Series

1. Product Description

Aramid insulation paper (commonly known as 青稞纸 / Nomex-type paper) is a high-performance electrical insulation material widely used in battery pack assembly, motor winding, and power electronics. It offers excellent dielectric breakdown strength, stable mechanical properties in both machine direction (MD) and cross direction (XD), and reliable performance at elevated temperatures up to 120°C. Available in six standard thicknesses from 0.10 mm to 0.48 mm with tight dimensional tolerances of ±0.02 mm, it is suitable for a broad range of insulation and structural applications in energy storage systems.

2. Technical Specifications — By Thickness

Parameter	Unit	Values						Test Method
Nominal Thickness	mm	0.10	0.20	0.23	0.28	0.38	0.48	ASTM D374 / Micrometer
Thickness Tolerance	mm	±0.02 (All Grades)						Micrometer
Nominal Grammage (Density)	g/cm³	1.10 – 1.25 (All Grades)						Gravimetric
Tensile Strength (MD)	N/mm²	≥50	≥50	≥60	≥60	≥60	≥60	Universal Tester
Tensile Strength (XD)	N/mm²	≥25	≥25	≥30	≥30	≥30	≥30	Universal Tester
Elongation at Break (MD)	%	≥2% (All Grades)						Universal Tester
Elongation at Break (XD)	%	≥2% (All Grades)						Universal Tester
Dielectric Breakdown Voltage	kV/mm	≥4.5	≥4.5	≥4.5	≥4.5	≥5.0	≥5.0	High-Voltage Tester
Thermal Resistance (Continuous)	°C	120°C × 4H (post-test: dielectric & appearance pass)						Oven DHG

* MD = Machine Direction (longitudinal); XD = Cross Direction (transverse). All values represent minimum specification limits.

3. Incoming Quality Control (IQC) — Inspection Summary

Sampling Plan: GB 2828-2003 | Normal Single Sampling | CR = 0 | MA AQL = 0.65 | MI AQL = 1.0

#	Inspection Item	Method / Instrument	Sub-Items	Defect Class	Scope
1	Appearance	Visual inspection vs. approved sample	Surface uniformity, no fuzz, no bubbles, no pinholes, no wrinkles	● MA	1 pc/lot
2	Dimensional	Caliper / Micrometer	Thickness, Length, Width, Unit weight	● MA	1 pc/lot
3	Dielectric Breakdown	High-voltage tester	Breakdown voltage (kV/mm)	● MA	1 pc/lot
4	Mechanical Strength	Universal testing machine	Tensile strength MD/XD; Elongation MD/XD	● MA	1 pc/lot
5	Thermal Resistance	Oven @ 120°C × 4H → re-test dielectric & appearance	Post-bake dielectric strength & visual pass	● MA	1 pc/lot
6	Cross-Section (Dissection)	Micrometer / cross-section	Material layer thickness verification	● MA	1 pc/lot
7	Packaging & Labeling	Visual inspection	Label content matches physical product	● MI	100% Full Check

* Defect Classification: CR = Critical (reject lot) | MA = Major (AQL 0.65) | MI = Minor (AQL 1.0)

4. Key Features

6 standard thicknesses: 0.10 / 0.20 / 0.23 / 0.28 / 0.38 / 0.48 mm

Tight thickness tolerance: ±0.02 mm across all grades

High dielectric strength: ≥4.5 kV/mm (thin) / ≥5.0 kV/mm (thick)

Balanced MD/XD tensile strength — dimensional stability

Thermal stability: passes 120°C × 4H bake test

Consistent density: 1.10–1.25 g/cm³ across all grades

Custom slit widths and lengths available on request

Full IQC protocol per GB 2828-2003 sampling standard

5. Typical Applications

Battery cell slot insulation in ESS packs

BMS board inter-layer insulation

Motor winding slot liner

Transformer layer insulation

Capacitor winding insulation

Power electronics structural insulation

The data provided in this document is based on typical values obtained under standard laboratory test conditions and is for reference only. Actual performance may vary depending on application method and environmental conditions. Geson Supply reserves the right to modify product specifications without prior notice. Users are advised to conduct their own application trials before use.

Geson Supply
Kyle Sun
www.gesonco.com
kyle@gesonco.com
WhatsApp: +86 188 5766 5584

GESON SUPPLY

Aramid Insulation Paper (青稞纸) | 6 Thickness Options: 0.10 – 0.48 mm