Cellulosed molded article having a functional effect and method for producing the same

Abstract

The invention relates to a method for producing cellulosed molded articles having a functional effect. The method is characterized by charging cellulosed fibers or films with incorporated ion exchangers having bactericidal metal ions and/or ionic pharmaceutical active substances in such a manner that a depot of these active substances is built up in the fiber. Said depot time releases the active substances in the amount of the corresponding equivalent concentration when the fibers and films are used in aqueous solutions. The invention also relates to molded articles produced according to the inventive method.

Description

[0001] The invention relates to cellulosic forms as well as a method for producing cellulosic forms by the dry-wet extrusion process with improved and enhanced functional effects, especially applicable in medicine, hygiene, garment, paper manufacturing and packaging industry. [0002] The functional effect is directed to a steady and meticulously adjustable bactericide effect, especially for wound contact material, sports and leisure clothing, hospital textiles, filter and packaging papers. PRIOR ART [0003] It is well known that heavy metal ions like e.g. silver, quicksilver / mercury, copper, zinc and zirconium ions are deadening or growth inhibiting to bacteria, viruses, fungi or spores (Thurman et al., CRC Crit. Rev. In Environ. Contr. 18 (4), P. 295-315 (1989)). With respect to the bactericide effect silver ions are of particular interest. The important advantage of silver ions against other bactericide metal ions, like e.g. Hg2+, is the insensibility of the human metabolism against...

AI Technical Summary

Benefits of technology

[0010] Aim of the present invention is to provide a cellulosic form with functional effect as well as a method for preparing said cellulosic form, especially for the use in medicine, hygiene and garment, wherein said forms have a bactericide effect and wherein especially said advantages go along with breathable clothing. A further aim is to keep said active agents in a textile depot and further to obtain sufficient release of said agents from said depot over a period of time. The released concentrations of said agent should be controllable. Further the forms, especially fibres or foils, obtainable by the method of the invention, should be formed thus, that they are useful for preparing wound overlays, band-aids, sanitary products, textiles, special papers and packaging material, because of the high adsorption ability of active agents. Finally composites including differing fibres should be producible.

Problems solved by technology

Working up of said galvanically silver-plated polyamide silk on knitters and moulders is problematical, since the silver layer of the polyamide silk is partially deposited on the yarn leading devices leading to numerous shut downs of said devices.

A further disadvantage of said fibre is that only cations may be used for a bactericidal effect, but no bactericidal anions, e.g. benzoic acid and sorbic acid.