How is Teflon high-temperature fabric applied in the thermal insulation layers of spacesuits?
This article covers application of Teflon high-temperature fabric in spacesuit thermal insulation layers. Material essence: PTFE-coated fiberglass fabric, known in aerospace as Beta cloth, combining fabric flexibility with PTFE extreme-environment inertness. Role: outermost layer of Thermal Micrometeoroid Garment (TMG) in extravehicular mobility units, directly facing vacuum, extreme temperature differentials, and micrometeoroids as first physical/thermal barrier for inner aluminized films. Extreme environment protection: withstands -200°C to +260°C range (sun-facing >120°C to shadow -160°C); white surface reflects solar radiation; protects fragile aluminized polyimide films from scratches and tears. Motion assistance: low friction PTFE surface prevents layer tangling during joint bending, ensuring EVA flexibility.
