Process for producing cellulosic shaped articles, cellulosic shaped articles and the use thereof

A cellulosic extruded article comprising a cellulose matrix and, dispersed therein, inclusions of nonpolar organic compound(s), wherein

• said cellulosic extruded article comprises at least one of
• (i) a viscosity-increasing hydrophobic agent,
• (ii) nanoscale, hydrophobicized sheet particles or
• (iii) elongated hydrophobicized particles,
• said sheet particles surrounding the inclusions as barrier material,
• the nonpolar organic compound(s) is present in an amount of more than 10% by weight, based on the weight of the cellulose matrix, and
• the hydrophobicized sheet particles are modified sheet silicates;
• wherein the barrier material consists of hydrophobicized bentonite;
• the nonpolar organic compound(s) have a melting point of less than 100° C. and is/are selected from the group consisting of hydrocarbons, waxes, beeswaxes, oils, fatty acids, fatty acid esters, stearic anhydrides and long-chain alcohols,
• the hydrophobic viscosity increasing agent(s) is present in an amount of 1 to 50% by weight, based on the weight of the cellulose matrix, and
• said article has a specific latent heat of greater than 20 J/g in a temperature range from 15 to 45° C.