Kapton® B Polyimide Film

Industrial Applications

Kapton® B is specified wherever the polyimide family's thermal and electrical performance must be combined with intrinsic opacity, low reflectivity, and electromagnetic absorption:

✦ Optical Sensor Packaging & Photodetection Shielding

Used as the encapsulant and baffle material for photodetectors, ambient light sensors, proximity sensors, and image arrays, where stray light from ambient sources must be excluded to prevent false triggering or signal saturation. Kapton® B's inherent opacity eliminates the need for painted coatings that can outgas or flake in cleanroom or vacuum environments.

✦ Space Optical Systems & Cryogenic Instruments

Applied as a flexible stray-light baffle and structural light shield in space telescopes, cryogenic spectrometers, and satellite focal-plane array assemblies, where the film's cryogenic stability (to −269 °C), low outgassing, and radiation resistance qualify it for the demanding cleanliness and performance requirements of space optical instruments.

✦ Flexible Printed Circuits — Cover-Lay & Back-Plane

Used as a black cover-lay film and substrate backing in flexible printed circuits for consumer electronics, automotive sensor modules, and medical devices, providing electrical insulation of surface conductors while its opacity eliminates visual transmission of circuit traces — an aesthetic and IP-protection consideration for visible circuit assemblies.

✦ EMI Absorption & Near-Field Suppression

Applied in flexible electromagnetic absorber stacks and antenna near-field suppression structures, where the combination of carbon-black conductance gradient, polyimide dimensional stability, and flexibility enables conformal EMI mitigation in handheld devices, RFID systems, and near-field communication (NFC) antenna assemblies.

✦ High-Temperature Industrial Masking

Used as a high-temperature masking tape substrate and process baffle in soldering, thermal spraying, and powder coating operations, where its black surface absorbs radiant heat uniformly and its Kapton® thermal stability enables repeated use across multiple process cycles without degradation of the masking function.

✦ Aerospace & Defence Optical Baffles

Specified as a low-reflectivity, radiation-hard baffle material in military and civil aerospace electro-optical systems, missile seekers, and surveillance sensor assemblies, where black polyimide film provides stray-light suppression in a lightweight, formable, and thermally stable format that withstands the mechanical and thermal stresses of flight environments.

✦ Nuclear & Radiation-Hard Instrumentation

Used in the construction of radiation-hard detector housings, scintillator reflector wraps, and photomultiplier tube light-shield films at nuclear research facilities and in nuclear power plant instrumentation, where the film's combined radiation tolerance and optical opacity support reliable, long-lifetime detector performance in high-dose environments.