Sheet composed of exfoliated clay mineral and method for producing same

A sheet comprising 90 wt % or more of exfoliated clay minerals, having a density of 1.6 g/cm3 or less, a thickness of 0.1 to 10 mm and a compression ratio of 20% or more, the exfoliated clay minerals being selected from the group consisting of mica, montmorillonite, iron montmorillonite, beidellite, saponite, hectorite, stevensite or nontronite, the exfoliated clay minerals having a thickness of 0.5 nm to 1000 nm.

A sheet comprising 90 wt % or more of exfoliated clay minerals, having a density of 1.6 g/cm3 or less, a thickness of 0.1 to 10 mm and a compression ratio of 20% or more, the exfoliated clay minerals being selected from the group consisting of mica, montmorillonite, iron montmorillonite, beidellite, saponite, hectorite, stevensite or nontronite, wherein a void ratio, defined as the ratio of the total sum of volumes of voids having an equivalent diameter of 15 μm or more and the total volume in a region of interest, is 3 vol % or less.

A sheet comprising 90 wt % or more of exfoliated clay minerals, having a density of 1.6 g/cm3 or less, a thickness of 0.1 to 10 mm, a compression ratio of 20% or more and a bending strength of 1 MPa or more, the exfoliated clay minerals being selected from the group consisting of mica, montmorillonite, iron montmorillonite, beidellite, saponite, hectorite, stevensite or nontronite.