powder insulation

powder insulation

[′pau̇d·ər ‚in·sə‚lā·shən]
(materials)
Thermal insulation material made up of a finely divided solid held between two surfaces (one hot, one cold); the powder reduces both convection and radiation heat flow between the surfaces.
References in periodicals archive ?
"My main work involved standing underneath hoppers - which were like funnels - and catching asbestos powder insulation in bags," said James, of Westerhope, Newcastle.
"While being labourer meant that I would undertake a range of tasks, my main work involved standing underneath hoppers -- which were like funnels -- and catching asbestos powder insulation in bags," said James, ofWesterhope, Newcastle.