Why DuPont’s Kapton MT+ quietly powers the hottest electronics

Flexible, heat-resistant, almost stubbornly reliable - DuPont’s Kapton MT+ polyimide film is designed for engineers who push power electronics hard. What the specialty film can really do, where its limits lie, and why it matters more than most people notice.

Reviewed: ad hoc news Lifestyle & Consumer desk. Edited and checked on 2026-06-19, 04:22. Details in the imprint.

DuPont’s Kapton MT+ looks unspectacular at first glance - a thin amber-brown film on a roll - but in the hands of an engineer it becomes the quiet backbone of inverters, chargers, and power modules that have to survive brutal heat and vibration every single day.

What Kapton MT+ is built for

Kapton MT+ is a thermally conductive polyimide film designed for situations where electronics run hot but still need robust electrical insulation. It sits between power components and heat sinks, channeling heat away while keeping dangerous voltages under control.

Engineers typically use it in power supplies, industrial drives, EV inverters, and high-density chargers where every degree of temperature margin counts. The film replaces thicker, less efficient insulation stacks, enabling more compact, tightly packed designs.

How it behaves in daily use

On the production floor, Kapton MT+ cuts like a tough but obedient tape. It can be stamped, laser-cut, or laminated into multilayer stacks without shedding dust or cracking, which line workers appreciate when they have to hit tight cycle times.

In service, the material simply disappears from the user’s awareness. What you notice instead is what does not happen - no hot spots blistering plastic housings, no modules failing after a summer of full-load operation in cramped cabinets.

Thermal performance and limits

The central promise is a blend of high dielectric strength with improved thermal conductivity compared with standard Kapton variants. That means current can rise and switching frequencies can climb while temperatures stay within the strict limits power semiconductors demand.

There are limits, of course. For very extreme thermal interfaces or where large mechanical tolerances must be filled, classic gap pads, greases, or ceramic substrates still win. Kapton MT+ works best when the surfaces are relatively flat and clamping pressure is well controlled.

Design advantages for engineers

One of the quiet wins is thickness. Because the film combines insulation and thermal paths in a single, thin layer, designers can shrink stack heights. That can translate into slimmer wall boxes, lower-profile on-board chargers, or simply more room for busbars and connectors.

The polyimide backbone resists soldering temperatures and many solvents, so the film survives reflow profiles and cleaning steps that would destroy softer plastics. This robustness gives process engineers more headroom when they optimize ovens and chemistry.

Where it fits in DuPont’s portfolio

Kapton MT+ lives in a broader family of Kapton films that range from flexible circuit substrates to general-purpose electrical insulation. DuPont positions MT+ specifically where the combination of temperature, voltage, and power density is unforgiving.

For customers, this simplifies sourcing. Instead of juggling multiple suppliers for heat spreaders and insulation films, many can standardize around a single, well-known material family and tune thickness and grades as needed.

What users notice in the field

Maintenance teams might only see Kapton MT+ when a module is opened after years of service. The film often still looks tidy, with no discoloration or cracking even near components that have clearly lived a hard life.

Downtime becomes the real metric. When power cabinets keep running through heat waves and dusty seasons without insulation failures, operators develop a quiet trust in the material choices inside their gear.

Context and stock reference

For DuPont de Nemours Inc, specialty films like Kapton MT+ are part of a strategy to stay anchored in high-value materials that are hard to copy and deeply embedded in customer designs. Shares of DuPont de Nemours Inc (US26614N1028) trade on the NYSE in US dollars.

Key facts on Kapton MT+

• Product: Kapton MT+ polyimide film
• Manufacturer: DuPont de Nemours Inc
• Category: Lifestyle/Consumer
• Launch: Marketed as an enhanced thermal Kapton variant in the 2010s, positioned for modern power electronics designs
• RRP / Price: Typically sold by thickness and roll size; pricing negotiated per industrial order rather than public retail tariffs
• Availability: Available globally via DuPont’s industrial distribution partners and direct sales channels, with a focus on power electronics and industrial OEMs
• Target group: Engineers and manufacturers designing compact, high-reliability power electronics where heat and insulation are critical
• Highlight / USP: Combines high dielectric strength with improved thermal conductivity in a thin, mechanically robust polyimide film

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.