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

a technology of functional effect and cellulose, which is applied in the field of cellulosed molded articles having a functional effect and method for producing the same, can solve the problems of cation use, problematic working up of galvanically silver-plated polyamide silk on knitters and moulders, etc., and achieve the effect of high adsorption ability of active agents

Inactive Publication Date: 2006-12-21
THURINGISCHES INSTITUT FUR TEXTIL & KUNST FORSCHUNG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[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.

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.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

example 2

[0033] Fibres are produced according to example 1 with a titre of 0.17 tex and a content of weakly cross-linked cation exchanger of 6 weight-%, based on the content of cellulose. These fibres are loaded with silver according to example 1. The fibre-parameters are given in table 3.

example 3

[0034] Fibres are made according to Example 1 with a titre of 0.5 tex and a content of weakly cross-linked cation exchanger of 0.5 weight-%, based on the cellulosic content. The loading with silver ions is carried out according to Example 1. The parameters of the fibres are shown in table 3. Further, in table 3 a fibre without weakly cross-linked cation exchanger is shown for comparison.

TABLE 3fiber withoutweaklylinkedcationexample 2example 3exchangeryarn-countdtex0.170.50.5yarn-count relatedcN / tex35.837.638.1tensile tear resistance(dry)elongation (dry)%13.011.411.8yarn-count-related tearcN / tex8.29.19.5resistance of loopssilver contentg / kg fiber36.64.6—

[0035] It is evident from examples 1 to 3, that the silver content on a fibre is adjustable over a wide range via the content of weakly cross-linked cation exchanger. Even with 0.5 weight-% a high silver content is obtainable. The influence of 0.5 weight-% of the weakly cross-linked cation exchanger on the textile parameters of the ...

example 6

[0038] Fibres with weakly cross-linked cation exchangers as well as common ion exchangers of the prior art, made according to Examples 1 to 5 are loaded with silver, copper (II) and zinc ions. The results are shown in Table 5.

TABLE 5metal content g / kg fiberfiber incorporated withcoppersilversilver / zinc20 weight-% ion exchanger according to23.757.123.9 / 27.5example 4 (comparative example)20 weight-% ion exchanger according to11.541.736.4 / 24.5example 5 (comparative example)15 weight-% weakly linked cation25.585.559.3 / 30.5exchanger as in example 1 to 3

[0039] Fibres loaded with copper ions, silver ions or a combination of silver ions and zinc ions may be used as bactericide fibres.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D01F2/02D02G1/20D21F11/00D21H11/00A22C13/00D04H3/013C08J5/18C08J5/20D01F1/10D01F2/00D01F11/02D04H3/00D06M11/42D06M11/44D06M11/46D06M13/188D06M15/263D21H11/20D21H21/36D21H27/08
CPCD01F1/103D01F2/00D06M11/42D06M11/44D06M11/46Y10T428/2904D06M15/263D21H11/20D21H21/36Y10T428/2905D06M13/188
Inventor BUETTNER, REINERMARKWITZ, HARDYKNOBELSDORF, CARMENBAUER, RALFMEISTER, FRANK
Owner THURINGISCHES INSTITUT FUR TEXTIL & KUNST FORSCHUNG
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