Kapton HN (Polyimide)

Verifiedpolymer

Kapton HN is a high-performance polyimide film that represents the standard-grade variant of DuPont's Kapton family, engineered for thermal stability and electrical insulation across demanding temperature ranges. It is widely deployed in aerospace, electronics, and electrical industries where components must maintain dimensional stability and dielectric properties in high-heat environments—such as motor windings, transformer insulation, flexible printed circuits, and spacecraft thermal control systems. Engineers select Kapton HN over commodity polymers when extended service at elevated temperatures combined with mechanical reliability and chemical resistance is non-negotiable; its balanced stiffness and thermal durability make it a go-to material for harsh operational conditions where alternative plastics would degrade or fail.

aerospace insulation and thermal protectionelectric motor windingsflexible circuit boards and interconnectstransformer and high-voltage electrical insulationspacecraft and satellite componentshigh-temperature mechanical seals

Compliance & Regulations

?UL 94?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property OverviewNormalized to typical max values

Property	Value	Unit	Conditions
Ultimate Tensile Strength(σUTS)2 entries	231.0	MPa	23°C
↳	139.0	MPa	200°C
Young's Modulus(E)	2.500	GPa	23°C

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions
Glass Transition Temperature(Tg)	633	K	—
Maximum Service Temperature(Tmax)	673	K	—
Thermal Conductivity(k)	0.1200	W/(m·K)	—
Coefficient of Thermal Expansion(α (CTE))	0.0000200	1/K	—

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Dielectric Constant (Relative Permittivity)(εr)	3.400	-	—

Verified Unverified Low confidence (<80%) Link to source

Regulatory Screening

Environmental

Safety & Biocompatibility

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

Kapton HN (Polyimide)

Mechanical Properties

Thermal Properties

Electrical Properties

Regulatory Screening

Environmental

Safety & Biocompatibility