page_title: Kapton
section_title: Usage
hierarchical_section_title: Kapton / Usage
caption_attribution_description: English: Kapton tapes, three rolls of different widths
context_page_description: Kapton is a polyimide film developed by DuPont in the late 1960s that remains stable across a wide range of temperatures, from −269 to +400 °C. Kapton is used in, among other things, flexible printed circuits and space blankets, which are used on spacecraft, satellites, and various space instruments.
  The chemical name for Kapton K and HN is poly. It is produced from the condensation of pyromellitic dianhydride and 4,4'-oxydiphenylamine. Kapton synthesis is an example of the use of a dianhydride in step polymerization. The intermediate polymer, known as a "poly", is soluble because of strong hydrogen bonds to the polar solvents usually employed in the reaction. The ring closure is carried out at high temperatures.
context_section_description: The thermal conductivity of Kapton at temperatures from 0.5 to 5 kelvin is rather high for such low temperatures, κ = 4.638×10⁻³ T0.5678 W·m⁻¹·K⁻¹. 
  This, together with its good dielectric qualities and its availability as thin sheets have made it a favorite material in cryogenics, as it provides electrical insulation at low thermal gradients. Kapton is regularly used as an insulator in ultra-high vacuum environments due to its low outgassing rate.
caption: Kapton tapes, three rolls of different widths
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