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Organic antimicrobial textile

a textile and antimicrobial technology, applied in the field of organic antimicrobial textiles, can solve the problems of inability to easily degrade in the environment, microbial strains forming, and continuous contamination of the environment with these disinfectants, and achieve the effect of increasing the surface area

Pending Publication Date: 2021-01-28
LIVINGUARD AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention relates to a process for creating textile materials with antimicrobial properties. The process involves using an exhaust process to evenly spread a liquor containing antimicrobial agents across the entire textile material, resulting in no spots remaining untouched. The exhaustion rate should be at least 75%, preferably higher, to ensure optimal results. The temperature of the liquor during the exhaust process should not be too high, as this can cause yellowness and weaken the fabric. The textile material should also be dried to remove any remaining excess fluid before proceeding to a curing process, which can further improve the antimicrobial properties. The resulting textile material already has antimicrobial properties, but a secondary process cycle, such as padding, can further improve its performance. The optional secondary process cycle should not exceed 15% of the main process cycle.

Problems solved by technology

However, one major problem arising from the extensive use of disinfectants is the continuous contamination of the environment with these disinfectants.
Such contamination may ultimately result in the emergence of microbial strains that are resistant to commonly used antimicrobial agents.
However, these methods mostly rely on the use of synthetic antimicrobial agents that cannot be easily degraded in the environment.
Moreover, many antimicrobial agents known in the prior art are not approved for use as food additives or preservatives, and, in consequence, cannot be used in combination with food packaging.

Method used

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Examples

Experimental program
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Effect test

example 1

extile Treated with L-Arginine

[0177]A 100% viscose textile was treated with L-arginine in a two-cycle process, comprising in the main liquor application cycle an exhaustion process, and in the secondary process cycle a padding process.

[0178]A liquor for both the exhaust and the padding processes was prepared containing 30 or 40 grams L-arginine per liter (gpl). The pH was adjusted to pH 4.5 using citric acid. The liquor was stirred at 70° C. for 1 hour.

[0179]The exhaustion process was carried out with a wet pickup of about 100%, resulting in an on-weight-fabric L-arginine add-on of 3.0 / 4.0%. Exhaustion was performed with the undiluted liquor for 1 hour at 60° C., followed by drying at 120° C.

[0180]Padding was performed with an L-arginine concentration of 10 gpl in the liquor. The padding pickup rate was about 65%. Thus, the total amount of L-arginine added to the textile in the exhaust and padding processes together can be estimated to be 3.0 / 4.0%+0.65%=3.65 / 4.65% o.w.f.

[0181]After ...

example 2

extiles Treated with L-Carnitine

[0198]A 100% viscose textile was treated with L-carnitine in a two-cycle process, the main process cycle comprising an exhaust process and the secondary process cycle comprising a padding process.

[0199]A liquor was prepared by dissolving in water 40 gpl L-carnitine provided as powder, and adjusting the pH to pH 4.5 with citric acid. The liquor was stirred for 30 minutes at 60° C. before being applied to the textile samples by means of exhaustion, followed by drying at 120° C., and padding.

[0200]The exhaustion process was carried out with a wet pickup of about 100%, resulting in an on-weight-fabric L-carnitine add-on of 4.0%. The padding pickup rate was about 65%. Thus, the total amount of L-carnitine added to the textile in the exhaust and padding processes together can be estimated to be 4.0%+2.6%=6.6% o.w.f.

[0201]After padding, the textile was dried at 120° C. and cured at 180° C. for 2 minutes. After curing, one treated sample was tested directly f...

example 3

extiles Treated with Combinations of L-Arginine and Chitosan

[0204]A 100% viscose textile was treated with chitosan or with L-arginine and chitosan in a two-cycle process, comprising in the main liquor application cycle an exhaust step, and in the secondary process cycle a padding step.

[0205]A liquor for the exhaustion step was prepared containing 40 grams chitosan stock solution (8%) per liter or 40 grams of chitosan stock solution and 60 grams of L-arginine per liter. The pH was adjusted to pH 4.5 using citric acid or acetic acid. The liquor was stirred at 70° C. for 1 hour. The exhaustion process was carried out with a wet pickup of about 100%, resulting in a chitosan add-on of 0.32% o.w.f. and an L-arginine add-on (where applicable) of 6% o.w.f. Exhaustion was performed for 1 hour at 60° C., followed by drying at 120° C.

[0206]The liquor used in the padding process contained 10 grams chitosan stock solution (8%) per liter or 10 grams of chitosan stock solution and 30 grams of L-ar...

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Abstract

The present invention relates to a method of rendering a textile antimicrobial by treating the textile in a liquor application process with at least one amino acid and / or at least one amino acid derivative, and to a wash-durable antimicrobial textile obtained by the method.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a method of rendering a textile antimicrobial by treating the textile in a liquor application process with at least one amino acid and / or at least one amino acid derivative. The obtained textile is equipped with a high antimicrobial performance, which is durable over multiple washing cycles.BACKGROUND OF THE INVENTION[0002]Disinfectants are extensively used in everyday life to prevent microbial spread and microbial infections, such as in the health care sector, the food industry, agriculture, or in common household products.[0003]However, one major problem arising from the extensive use of disinfectants is the continuous contamination of the environment with these disinfectants. Usually, disinfectants are provided in solution and applied directly onto contaminated surfaces, such as in hospitals or of laboratory equipment, or skin wounds. In case these disinfectants are not neutralized, such as by autoclaving, or cannot be ...

Claims

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Application Information

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IPC IPC(8): D06M16/00D06M13/342D06M11/77D06M11/83
CPCD06M16/00D06M13/342D06M2200/00D06M11/83D06M11/77D06M13/144D06M15/03D06M15/15D06M2400/00D06M11/62D06C7/00
Inventor SWAMY, SANJEEVGÄLLI, RENÉ
Owner LIVINGUARD AG
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