ISO 17299 Textiles - Determination of Deodorant Properties

The “ISO 17299 Textiles - Determination of Deodorant Properties” standard, developed by the International Organization for Standardization (ISO) , consists of the following sub-sections published under the same title:

• The standard “ISO 17299-1 Part 1: General principle” describes the general principle and deodorant test methods for deodorant textile products for textile products such as woven fabric, knitted, nonwoven, fibers and yarns, braided products, tapes and slings.

In principle, the concentration of gaseous odor component chemicals in the sampled containers (A) and unsampled containers (B) is measured using the specified instruments after the specified contact time. The reduction rate is determined from the chemical concentration with and without the sample. The test should be conducted either with the odor chemical alone or with mixed odor component chemicals, as described in each section of ISO 17299.

The test environment must be maintained at 20 degrees Celsius and 65 percent relative humidity, according to the ISO 139 standard. Samples are kept under the same conditions for at least 24 hours. For this test, a temperature of 23 degrees Celsius and 50 percent relative humidity, according to the ISO 139 standard, can be used, and the conditions used are then recorded in the test report.

The test procedure is described in other parts of this standard. In all parts, the concentrations of the test gas without and with the sample are shown as B and A, respectively.

• The standard "ISO 17299-2 Part 2: Detector tube method" describes a deodorant test method using a detector tube for all textiles. This method is applicable to odorant chemicals such as ammonia, acetic acid, methyl mercaptan, and hydrogen sulfide.

In principle, the concentration of gaseous odor component chemicals in containers with or without a test sample after a specified contact time is measured using detector tubes. The percentage odor reduction of the chemical concentration is calculated from the concentration data with and without the sample. Each chemical must be tested separately.

Testing for each odor component chemical is performed separately. Each odor component chemical is prepared immediately prior to testing. Other gas preparation methods, such as using a standard gas generator (e.g., a parmearator or cylinder), may also be used.

The test environment is maintained at 20 degrees Celsius and 65 percent relative humidity in accordance with ISO 139. The dimensions and masses of the samples are shown in the table provided in the standard. The number of test samples for a test is three. For multi-layered products, the edge and the untreated layer (or the unrelated layer) can be covered with aluminum foil to prevent contact with odorous gas, or the sample can be folded in half with the untreated layer inside. The samples are conditioned under the conditions used for the test for at least 24 hours.

• The standard "ISO 17299-3 Part 3: Gas chromatography method" describes a gas chromatography test method for deodorant testing of all textile products. This method is applied to fragrance component chemicals such as indole, isovaleric acid, nonal, and acetic acid with added sodium chloride. This test method describes two preparation methods:
  • In Method A, a fragrance chemical is applied in a container, avoiding contact with a sample. Each chemical is tested individually.
  • In Method B, an odorant chemical is injected directly into a sample in a container. The chemicals tested in this method are a mixture of acetic acid and sodium chloride.

In principle, the concentration of gaseous odorant chemicals in containers with or without a test sample is measured by gas chromatography (GC) after a specified contact time. The rate of decrease in the concentration of odorants in the container is calculated from the concentration data with and without the sample.

The test environment used in this test is 20 degrees room temperature and 65 percent relative humidity in accordance with the ISO 139 standard.

This standard defines two preparation methods: method A and method B. One method is selected with the approval of the relevant parties. For textile products, the sample size or mass is indicated in the table provided in the standard. For multi-layered products, the edge and the untreated layer (or non-relevant layer) can be covered with aluminum sheets to prevent contact with the odor medium, or in method A, the product can be folded in half with the non-relevant layer inside.

• The standard "ISO 17299-4 Part 4: Condensation Sampling Analysis" describes a deodorant testing method using analytical instruments after condensation sampling methods for all textile products. This method is applicable to gaseous odorants such as indole, methyl mercaptan, hydrogen sulfide, isovaleric acid, and nonal.

In principle, the concentration of a gaseous odorant in a container with or without a textile sample is measured using instrumentation after a specified time. The rate of decrease in the gaseous odorant concentration is calculated from the difference between the average concentration data obtained between the container with and without the sample. Testing should be performed separately for each chemical.

For textile products, the sample size or mass is shown in the table provided in the standard. For multilayer products, the edge and the untreated layer (or untargeted layer) may be covered with an aluminum sheet, or the test sample may be folded in half with the untreated layers facing inward to prevent the untreated layers from coming into contact with the odorous atmosphere. The sample is conditioned as specified in ISO 17299-1.

• The standard "ISO 17299-5 Part 5: Metal-oxide-semiconductor sensor method" describes a deodorant test method using an odor analyzer equipped with multiple metal-oxide-semiconductor sensors for compound odors. The artificial compound odors used in this standard are half sweat odor, half body odor (nonenal mixture odor), and half fecal odor. This standard applies to all types of textiles, including woven fabrics, knits, yarns, threads, fibers, braids, and cords.

In principle, semi-unpleasant odorous gases are placed in plastic bags with or without a test sample. After a 2-hour reaction time, the odor unit concentration of the remaining gases is obtained using an odor tester with 10 metal oxide semiconductor sensors. The rate of decrease in odor chemical concentration is calculated from the odor unit concentration with and without the sample.

• The standard "ISO 17299-6 Part 6: Gas chromatography method using automatic dosing and sampling" describes gas chromatography (GC) test methods for deodorant testing of all textile products. These methods apply to fragrance component chemicals such as indole, isovaleric acid, and nonal. This document describes two methods:
  • Method A (single analysis) is the method in which a fragrance chemical is applied in a container, avoiding contact with a test sample.
  • Method B (auto-regeneration) is the method in which a fragrance chemical is applied in a container avoiding contact with a test sample and tested repeatedly with a test sample.

One or both methods are selected with the approval of the relevant parties. Examples of test conditions are included in the standard appendix (Annex B).

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