Kapton

Part of speech: noun

Definitions

1. A tough, amber-colored polyimide film known for remaining stable across a very wide range of temperatures and used for insulation in electronics
2. A trademarked heat-resistant plastic film that electrical engineers and aerospace makers rely on for insulating wires and components under extreme conditions
3. A thin, flexible polymer sheet with exceptional thermal and electrical resistance, commonly used as insulating tape or a substrate in circuit boards

Etymology: Kapton is a trademark, and its story is less about word-building than about a product. It was introduced in the late 1960s by DuPont, the American chemical company, for a plastic film that stays stable across an extreme range of temperatures and resists chemicals, radiation and electrical current. The name was coined for that product, so it has no older meaning to trace; it simply names a material that was invented, patented and branded in that decade. The lowercase "kapton" that appears in some writing is the same trademark with its capital letter dropped, a common habit for brand names that have become generic labels for the material. The film is best known as the polyimide sheet that wraps spacecraft, insulates flexible circuit boards and protects wiring in aircraft and satellites, where its heat tolerance matters most.