GB/T 38398-2019Textiles—Filtration performance—Determination of most penetrating particle size (English PDF)
纺织品 过滤性能 最易穿透粒径的测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
December 31, 2019
Implementation date
July 1, 2020
Scope
GB/T 38398-2019 is the English-translated version of 纺织品 过滤性能 最易穿透粒径的测定.
GB/T 38398-2019 is the Chinese standard "Textiles—Filtration performance—Determination of most penetrating particle size". Its scope clause reads: This standard specifies the test method for the most easily penetrated particle size and filtration efficiency of textiles.
This standard applies to all types of air filtration fabrics and their products. Its clauses include terms and definitions; test principle.
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Document preview — GB/T 38398-2019
National Standard of the People's Republic of China
- ICS
- 59.080.30
- Classification
- W 04
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 terms and definitions
- 4 Test principle
1 Scope
This standard specifies the test method for the most easily penetrated particle size and filtration efficiency of textiles.
This standard applies to all types of air filtration fabrics and their products.
2 Normative references
The following documents are essential for the application of this document. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest version (including all amendments) applies to this document.
GB/T 6682 Analytical laboratory water specifications and test methods
3 terms and definitions
The following terms and definitions apply to this document.
3.1 Filtrationefficiency
The difference between the aerosol concentration before and after the textile filtration and the aerosol concentration before the filtration reflects the ability of the textile to capture particulate matter.
3.2 Particulate matter
Solid or liquid particulate matter in the air.
3.3 Filtration resistance
Static pressure difference between the upstream and downstream of the textile under certain test wind speed or volume.
3.4 Particle number concentration
The amount of particulate matter per unit volume of gas (air).
3.5 Minimum filtration efficiency
The efficiency corresponding to the lowest point of the textile particle size counting efficiency curve at a certain gas flow.
3.6 Most easily penetrated particle size mostpenetratingparticlesize; MPPS
The size of the particles that most easily penetrate the textile filter.
Note. The most easily penetrated particle size is the particle size corresponding to the lowest point of the particle size counting efficiency curve under certain test conditions.
4 Test principle
Aerosol generator and differential electromobility analyzer to produce aerosols of a certain particle size, using aerosols as particles in simulated environments
Test dust source. After the aerosol is filtered by the sample, the aerosol before and after the sample is collected, and measured by a condensing particle counter […]
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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.
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