Heat insulation sheet and sheet material using heat insulation sheet

A heat insulation sheet for use in an interior material for a wall, a ceiling, a curtain, and a blind, the heat insulation sheet comprising:

• a base material made of paper or fabric and having flexibility;
• a carbon sheet made by rolling expanded graphite and having a thickness from twenty-five micrometers to one hundred micrometers;
• a fixing layer being arranged between the base material and the carbon sheet, the fixing layer being made of an acrylic solvent-based hot-melt pressure-sensitive adhesive or a silicon-based hot-melt pressure-sensitive adhesive,
• an activated carbon layer arranged outside of the carbon sheet on an opposite face to the fixing layer, the activated carbon layer housing a functional substance, and
• a surface material with good ventilation property attached to an outer face of the carbon sheet,
• wherein the surface material is a paper sheet, a fabric sheet, a textile fabric sheet, a vinyl chloride sheet, or a natural leather.