The material is used in the heat shield of the Apollo. When re-entering, the shield will burn because of the high temperature due to friction. However, Chartek chars, dissipates heat through burn-off and creates a protective coating which prevents the heat from penetrating anywhere further than the outer surface of the spacecraft, keeping the inside cabin at a comfortable temperature of 21oC.
When exposing to high temperature heat or flame, Chartek expands in volume, acting as an insulating barriers.
Although there is not yet any serious fire accident reflecting its quality, Chartek is considered an effective material used in modern fireproofing systems, based on the results of tests on stability, integrity and insulation conducted by the Underwritten Laboratories (UL) and Norwegian Petroleum Directorate (NPD).
The following table shows some comparison fire endurance times for various composite panels. The black bar shows 60 minutes for the time endurance of a Chartek-coated panel, which is relatively long.
It is constantly improved and recently has been marketed out in form of intumescent paints and foams; its innovations are critical fire-proofing materials in such industrial facilities as oil refineries, petrochemical plants, as well as in commercial infrastructures and such public buildings as schools, hospitals, airports and shopping malls.
Chartek and one of its innovations, Interchar, contribute largely to the development of safer workplace and public buildings. In normal condition, Chartek coating provides a resilient and smooth finish to...