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

摘要

The invention relates to a process for producing cellulosic shaped articles with stabilized inclusions in a microfine dispersion of nonpolar organic compounds and mixtures by a dry-wet extrusion process. The shaped articles produced in this way exhibit by comparison with unmodified cellulose fibers a substantially increased storage capacity for heat and/or nonpolar active substances. They are suitable in particular for use in textiles for clothing, industrial textiles, leisure, medicine and cosmetics. Potential functional effects imparted include the physical effect of heat storage and/or the uniform and finely meterable storage and release of nonpolar active substances and plant extracts from the interior of the fibers of the shaped articles. It is possible through a suitable choice of the nonpolar portion to produce by this process also fibers capable of absorbing liquid or gaseous nonpolar substances.

主权项

1. 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, andthe 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.