FZ/T 73049-2024 (FZ/T 73049-2014) PDF English
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FZ/T 73049-2014: Knitted Mask---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/FZT73049-2014
TEXTILE INDUSTRY STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 59.080.30
W 63
Knitted Mask
针织口罩
Issued on: OCTOBER 14, 2014
Implemented on: APRIL 1, 2015
Issued by. Ministry of Industry and Information Technology of the
People’s Republic of China
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Specification... 5
4 Requirements... 5
5 Tests... 7
6 Determination Rules... 9
7 Product Instructions, Packaging, Transportation and Storage... 10
Knitted Mask
1 Scope
This Standard stipulates the specification, requirements, tests, determination rules,
product instructions, packaging, transportation and storage of knitted mask.
This Standard is applicable to the quality appraisal of face masks made mainly from
knitted fabrics.
This Standard is inapplicable to face masks for medical use and labor protection. This
Standard is inapplicable to clothing for infants and young children aged 36 months and
below.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 2910 (all parts) Textiles - Quantitative Chemical Analysis
GB/T 2912.1 Textiles - Determination of Formaldehyde - Part 1.Free and Hydrolyzed
Formaldehyde (water extraction method)
GB/T 3920 Textiles - Tests for Color Fastness - Color Fastness to Rubbing
GB/T 3921-2008 Textiles - Tests for Color Fastness - Color Fastness to Washing with
Soap or Soap and Soda
GB/T 3922 Textiles - Testing Method for Color Fastness to Perspiration
GB/T 4856 Package of Cotton Goods and Knitwear
GB 5296.4 Instructions for Use of Products of Consumer Interest - Part 4.Textiles and
Apparel
GB/T 5453 Textiles - Determination of the Permeability of Fabrics to Air
GB/T 5713 Textiles - Tests for Color Fastness - Color Fastness to Water
GB/T 7573 Textiles - Determination of pH of Aqueous Extract
GB 9994 Conventional Moisture Regains of Textile Materials
---Slight. defects are not visually obvious and can only be seen through careful
identification.
---Obvious. defects do not affect the overall effect, but the existence of defects can
be perceived.
4.4.2 Sewing regulations
4.4.2.1 All parts of stitch shall have an appropriate degree of tightness, so as to ensure
that thread will not be taken off or broken after stretching, and no seams will be leaked.
4.4.2.2 The sash shall be firmly sewn and has a suitable length.
5 Tests
5.1 Inspection of Intrinsic Quality
5.1.1 Test preparation and conditions
The samples taken must not have defects that would affect the test.
5.1.2 Test methods
5.1.2.1 pH value test
The test shall be conducted in accordance with the stipulations in GB/T 7573.
5.1.2.2 Formaldehyde content test
The test shall be conducted in accordance with the stipulations in GB/T 2912.1.
5.1.2.3 Undesirable odor test
The test shall be conducted in accordance with the stipulations in GB 18401.
5.1.2.4 Decomposable carcinogenic aromatic amine dye test
The test shall be conducted in accordance with the stipulations in GB/T 17592.
5.1.2.5 Fiber content test
The test shall be conducted in accordance with the stipulations in GB/T 2910, FZ/T
01026, FZ/T 01057 and FZ/T 01095.Calculate in accordance with the conventional
moisture regains. Conventional moisture regains shall comply with the stipulations in
GB 9994.
5.1.2.6 Color fastness to soaping test
The test shall be conducted in accordance with the stipulations of Method A (1) in GB/T
3921-2008.
5.1.2.7 Color fastness to water test
The test shall be conducted in accordance with the stipulations in GB/T 5713.
5.1.2.8 Color fastness to saliva test
The test shall be conducted in accordance with the stipulations in GB/T 18886; merely
test the skin-facing surface.
5.1.2.9 Color fastness to rubbing test
The test shall be conducted in accordance with the stipulations in GB/T 3920; merely
test the straight direction.
5.1.2.10 Color fastness to perspiration test
The test shall be conducted in accordance with the stipulations in GB/T 3922.
5.1.2.11 Air permeability test
The test shall be conducted in accordance with the stipulations in GB/T 5453.Pressure
drop on both sides of the sample is 100 Pa; the area of test is 20 cm2; test surface is
skin-facing surface; test zone is the central zone of face mask. Test 3 face masks; test
each face mask once. Take the arithmetic mean value of the test results of the 3 face
masks as the final test result.
5.2 Inspection of Appearance Quality
5.2.1 Lamp inspection is generally adopted. Use a 40 W white-light fluorescent lamp;
with a lamp cover on it. The vertical distance between the lamp cover and the center
of the inspection table is 80 cm ± 5 cm.
5.2.2 If natural light is used indoors, the incident direction of the light source is north to
the left (or the right) upper corner. DO NOT place the product under direct sunlight.
5.2.3 During the inspection, spread the product on the inspection table. Cover the
surface of the table with a white cloth. The inspection personnel’s sight shall be
squarely facing the surface of the product, and the distance between the eyes and the
product shall be above 35 cm.
5.2.4 Measurement parts and regulations
5.2.4.1 Measurement parts
Measurement parts are shown in Figure 1.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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