THERMALLY-INSULATING SLEEVE

摘要

A thermally insulating sleeve (10; 30) comprises a generally-tubular wall portion (12; 32) formed from heat resistant material. The sleeve also comprises a heat-activatable layer (16; 36) on the interior surface (18; 38) of said wall portion (12; 32). The heat-activatable layer (16; 36) is such that, when subjected to heat, the layer increases in thickness, thereby improving thermal insulation.