Process for determining the odor-inhibiting properties of textile auxiliaries
View Patent ↗Gaseous or volatile substances which are either themselves odor-active or components of odor-active mixtures of substances are applied to fabrics. The amount of these substances adsorbed by the textiles is then determined. It is then determined what amount of these substances is desorbed again by the textiles upon storage. Comparison of the results which are obtained on textiles which had been finished beforehand with textile auxiliaries with the results of non-finished textiles enables statements to be made regarding odor-inhibiting properties of textile auxiliaries.
1. A process for determining the odor-inhibiting properties of textile auxiliaries, where the following process steps a) to e) are carried out with a fabric to which the textile auxiliary to be investigated has been applied beforehand, and additionally with a fabric of the same provenance to which this textile auxiliary has not been applied:
a) application of a gaseous or volatile substance (substance A) to a fabric,
b) either
b1) extraction of a sample of the resulting fabric with a solvent in which substance A is readily soluble or
b2) heating a sample of the fabric obtained after carrying out step a) in a closed apparatus under conditions under which essentially complete desorption of substance A into the gas phase takes place, but no chemical decomposition of substance A,
c) determination of the amount of substance A extracted when carrying out step b1), or determination of the amount of substance A present in the gas phase after carrying out step b2),
d) storage of another sample of the fabric obtained after step a) at room temperature in a closed apparatus,
e) determination of the amount of substance A present after step d) in the gas phase in the closed apparatus,
where substance A is either itself odor-active or a component of an odor-active mixture of substances, where steps d) and e) can be carried out from the point of view of time before or after steps b) and c).
2. A process as claimed in claim 1 , wherein substance A is tobacco smoke, human perspiration and/or a perfume and/or a component present in tobacco smoke, human perspiration or perfume.
3. A process as claimed in claim 1 , wherein substance A is nicotine or an unbranched aliphatic, saturated or monounsaturated monocarboxylic acid having 4 to 12 carbon atoms.
4. A process as claimed in claim 1 , wherein, in step a), nicotine is used as substance A and is applied to the fabric by storing the fabric in a closed apparatus in an atmosphere containing nicotine.
5. A process as claimed in claim 1 , wherein the fabric consists of 100% by weight of cellulose fibers or polyester fibers or a mixture of these types of fiber.
6. A process as claimed in claim 1 , wherein the determination according to step c) and/or e) is carried out by means of gas chromatography.