GB/T 33610.1-2019 PDF English
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GB
NATIONAL STANDARD OF THE
PEOPLE'S REPUBLIC OF CHINA
ICS 59.080.01
W 04
Textiles - Determination of deodorant property - Part 1:
General principle
(ISO 17299-1:2014, MOD)
ISSUED ON: DECEMBER 31, 2019
IMPLEMENTED ON: JULY 1, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Principle ... 8
5 Reagents ... 8
6 Materials and equipment ... 9
7 Test environment and sample conditioning ... 10
8 Test procedures ... 10
9 Result calculation ... 10
10 Determination of deodorant properties of textile products ... 11
11 Test report ... 11
Appendix A (Informative) Deodorant substances ... 12
Appendix B (Informative) Human sensory testing ... 15
Appendix C (Informative) Deodorant textile certification (Example) ... 17
Appendix D (Informative) Unpleasant odour chemical component and deodorization
mechanism ... 19
Appendix E (Informative) Determination of test conditions for instrumental test
methods ... 21
Textiles - Determination of deodorant property - Part 1:
General principle
1 Scope
This part of GB/T 33610 specifies the general principles for the determination of the
deodorant properties of textiles.
This part applies to textile products such as woven fabrics, knitted fabrics, non-woven
fabrics, fibers and yarns, braids, strips and ropes.
2 Normative references
The following documents are essential for the application of this document. For
referenced documents with dates, only the versions corresponding to the dates are
applicable to this document; for referenced documents without dates, the latest versions
(including all amendments) are applicable to this document.
GB/T 6529 Textiles - Standard atmospheres for conditioning and testing (GB/T
6529-2008, ISO 139:2005, MOD)
GB/T 33610.2 Textiles - Determination of deodorant property - Part 2: Detector
tube method (GB/T 33610.2-2017, ISO 17299-2:2014, MOD)
GB/T 33610.3 Textiles - Determination of deodorant property - Part 3: Gas
chromatography method (GB/T 33610.3-2019, ISO 17299-3:2014, MOD)
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 General
3.1.1 unpleasant odour
Unpleasant smells related to people's living environment, such as toilet smell, sweat
smell, body odour (2-Nonenal mixture odour) and excrement smell.
3.1.2 major component chemicals of unpleasant odour
The main chemical components of odours in people's living environment.
NOTE 1: These chemical components include:
-- Toilet odour: ammonia;
-- Sweat odour: ammonia, acetic acid and isovaleric acid;
-- Body odour (2-nonenal mixture odour): ammonia, acetic acid, isovaleric acid and 2-nonenal;
-- Excrement odour: ammonia, acetic acid, hydrogen sulfide, methyl mercaptan and indole.
NOTE 2: There may be other related chemical substances, but those listed are representative.
3.1.3 deodorant property
Ability to reduce unpleasant odours in surrounding air.
NOTE: The unpleasant odour is caused by the chemical components listed in 3.1.2.
3.1.4 deodorant textiles
Textiles with deodorant properties.
NOTE: The unpleasant odour is caused by the chemical components listed in 3.1.2.
3.1.5 deodorant substances
Substances that can react physically or chemically with unpleasant odours and reduce
them.
NOTE 1: The unpleasant odours are caused by the chemical components listed in 3.1.2.
NOTE 2: Appendix A gives examples of deodorant substances.
3.1.6 deodorant processing
The process of applying deodorant substances to the surface or inside of textile products
to give them deodorant properties, including padding and drying processes, addition
during chemical finishing, mixing into polymers during spinning, or other techniques.
3.2 Deodorant property test
3.2.1 evaluation of a deodorant property
The determination of the reduction rate of the concentration of unpleasant odour
chemical components in the container containing the sample, compared with the test
without the sample.
NOTE: The test method for the concentration of unpleasant odour chemical components is defined in
5.3 Methyl mercaptan (CH3SH): Standard test gas diluted with nitrogen to a
concentration (volume fraction) of 100 μL/L or 1000 μL/L.
5.4 Hydrogen sulfide (H2S): Standard test gas diluted with nitrogen to a concentration
(volume fraction) of 100 μL/L.
5.5 Indole (C8H7N): Reagent.
5.6 Isovaleric acid [(CH3)2CHCH2COOH]: The purity is 98.0%.
5.7 2-Nonenal (C9H16O): The purity is 95.0%.
5.8 Dilution gas: Dry air obtained by mixing nitrogen with a purity of 99.99% or above
and oxygen, or nitrogen with a purity of 99.99% or above.
5.9 Ethanol: The purity is 99.5%.
6 Materials and equipment
6.1 Sampling bags: Sampling bags with a capacity of 1 L, 5 L, or 50 L can be used as
required. The materials can be polyvinyl fluoride film, polyester and polyester
composite film, polyvinyl alcohol film, etc. The sampling bag needs to be installed with
a plastic or rubber tube before the test.
6.2 Air pump: It shall be equipped with a flow meter that can measure 0.2 L/min and
5 L/min gas. If a flow meter is not equipped, a cumulative flow meter shall be used.
6.3 Cumulative flow meter: It is capable of measuring gas flow rates of 500 mL/min
and above.
6.4 Hand dryer: with an electric power of 1 kW; it is used to heat ammonia water to
40 ℃~50 ℃ and volatilize it in a 1 L plastic bag. It can be replaced by equipment with
the same function.
6.5 Syringes: Glass syringes with capacities of 0.5 mL and 100 mL.
6.6 Heat sealing device: It is used to seal the opening of the sampling bag. It can be
replaced by a seal with the same sealing ability.
6.7 Aspirator: It shall be capable of evacuating all the gas in the sealed 5 L sampling
bag. A vacuum pump can be used.
6.8 Sealing strip.
6.9 Oven: The temperature can reach 80 ℃.
6.10 Gas cylinders: Standard test gas-generating devices may also be used.
7 Test environment and sample conditioning
The test shall be carried out in a standard atmosphere with a temperature of (20.0±2.0) ℃
and a relative humidity of (65.0±4.0)% as specified in GB/T6529. The sample shall be
conditioned in this environment for at least 24 hours.
NOTE: This experiment can adopt the environment of temperature (23.0±2.0) ℃ and relative humidity
(50.0±4.0)% specified in GB/T6529. If adopted, please indicate it in the test report.
8 Test procedures
The test procedures are specified in the following standards:
-- GB/T 33610.2: Detector tube method;
-- GB/T 33610.3: Gas chromatography method.
In the above methods, the concentration of the unpleasant odour chemical component
when the sample is present is recorded as A, and the concentration of the unpleasant
odour chemical component when the sample is not present is recorded as B.
9 Result calculation
The reduction rate of the unpleasant odour chemical component concentration is
calculated according to formula (1):
where:
ORR -- unpleasant odour chemical component concentration reduction rate, %;
B -- the average value of the concentration of unpleasant odour chemical
components when no sample is present;
A -- the average value of the concentration of unpleasant odour chemical
components when the sample is present.
Appendix B
(Informative)
Human sensory testing
B.1 Overview
Human sensory testing has been used for a long time to measure unpleasant odours.
This method uses the human sense of smell as a detector.
The test procedure and research results of the human sensory testing will be reflected
in the instrumental test method standard for deodorant properties.
Therefore, the test steps of the human sensory testing are given in this appendix.
B.2 Odour intensity level
Unpleasant odour intensity is classified into the following 6 levels:
-- 0: No unpleasant odour;
-- 1: Faint unpleasant odour, the kind of the unpleasant odour cannot be identified
(unpleasant odour threshold concentration);
-- 2: Weak unpleasant odour, the kind of the unpleasant odour can be distinguished
(conceivable threshold concentration);
-- 3: Medium unpleasant-odour, easily detectable;
-- 4: Strong unpleasant odour;
-- 5: Very strong unpleasant odour.
B.3 Test methods
B.3.1 Test environment
The test environment shall be maintained at a temperature of (20.0±2.0) ℃ and a
relative humidity of (65.0±4.0)% or a temperature of (23.0±2.0) ℃ and a relative
humidity of (50.0±4.0)%, and shall comply with the provisions of GB/T 6529. There
shall be no unpleasant odour in the test environment that may affect the judgment of
the test personnel. The temperature and humidity of the test environment shall be
indicated in the test report.
B.3.2 Container
Appendix C
(Informative)
Deodorant textile certification (Example)
C.1 Deodorant textile certification
The main components of the certification system for deodorant textiles currently
established on the market are shown below.
C.2 Certification requirements
C.2.1 Labels
The certification label for deodorant textiles includes the following:
-- Certification organization;
-- Certification number;
-- Deodorization treatment targets: toilet odour, ammonia odour, sweat odour, body
odour (2-nonenal mixture odour), excrement odour;
-- Deodorization effect expression: When in direct contact with unpleasant odour
chemical components, the textile product can reduce the unpleasant odour in the
surrounding air;
-- Chemical component of unpleasant odour: see 3.1.2;
-- Deodorant substances: indicate the substances used for deodorization treatment;
-- Manufacturer.
C.2.2 Safety requirements for deodorant substances and products
Deodorant substances and products shall comply with the safety requirements of current
domestic regulations and certification standards, such as conducting skin allergy tests
and patch tests on deodorant textiles.
C.2.3 Requirements for deodorant properties
Through the determination of the minimum concentration reduction rate of each
unpleasant odour chemical component, it is judged whether the textile has a significant
deodorant effect. Table C.1 gives the minimum concentration reduction rate index.
From long-term experience, when the concentration reduction rate is greater than or
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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