YY/T 1632-2018 PDF in English
YY/T 1632-2018 (YY/T1632-2018, YYT 1632-2018, YYT1632-2018)
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| YY/T 1632-2018 | English | 110 |
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Water resistance of textiles for medical protective apparel. Impact penetration test
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YY/T 1632-2018: PDF in English (YYT 1632-2018) YY/T 1632-2018
PHARMACEUTICAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 11.120.20
C 48
Water Resistance of Textiles for Medical Protective
Apparel - Impact Penetration Test
ISSUED ON: DECEMBER 20, 2018
IMPLEMENTED ON: JUNE 1, 2019
Issued by: National Medical Products Administration
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Principle ... 4
5 Instruments and Textiles ... 5
6 Test Preparation ... 5
7 Operating Procedures ... 5
8 Result and Evaluation ... 6
9 Laboratory Report ... 6
Bibliography ... 10
Foreword
This Standard was drafted in accordance with the rules in GB/T 1.1-2009.
Please be noted that certain content in this document might involve patents. The
institution that issues this document does not undertake the responsibility of identifying
these patents.
This Standard was proposed by National Medical Products Administration.
This Standard shall be under the jurisdiction of Beijing Institute of Medical Device
Testing (BIMT).
The drafting organization of this Standard: Beijing Institute of Medical Device Testing
(BIMT).
The main drafters of this Standard: Huang Yongfu, Jiang Hongxia, Zhang Yaping,
Zhaodan.
Water Resistance of Textiles for Medical Protective
Apparel - Impact Penetration Test
1 Scope
This Standard stipulates the principle, operating procedures, result and evaluation, and
laboratory report of impact penetration test method for water resistance of textiles for
medical protective apparel.
This Standard is applicable to the evaluation of water resistance of textiles for medical
protective apparel with or without waterproof finishing.
This Standard is inapplicable to textiles for medical protective apparel that cannot
maintain a flat state under tension (hereinafter referred to as textiles).
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 6529 Textiles - Standard Atmospheres for Conditioning and Testing
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Water Resistance
Water resistance refers to textiles’ resistance to moisture and water penetration.
4 Principle
Spray a certain volume of water onto the surface of a sample. By weighing the mass
change of the water-absorbent paper under the sample before and after the spraying,
evaluate the sample’s water resistance.
5 Instruments and Textiles
5.1 Impact Water Permeability Tester
Impact water permeability tester is divided into Type-I and Type-II. Type-II adds water-
stopping baffle and waterdrop collection box. Sketch maps of the physical tester are
shown in Figure 1 and Figure 2; design parameters are shown in Figure 3.
5.2 Water-absorbent Paper
Thickness (0.71 ± 0.1) mm; gram weight (370 ± 4.5) g/m2; water-absorbing capacity
(220 ± 30) %; dimensions (229 ± 10) mm (152 ± 10) mm.
5.3 Water for Laboratory Use
Comply with Grade-3 water specified in GB/T 6682. Temperature shall be controlled at
(27 ± 1) °C.
5.4 Balance
Accurate to 0.1 g.
6 Test Preparation
At least cut off 3 samples from textiles. Sample dimensions are: (330 ± 10) mm (178
± 10) mm. If applicable, the samples’ lengthwise direction shall be warp-wise.
Before the test, conduct temperature and humidity adjustment treatment on the
samples and the water-absorbent paper in accordance with the stipulations in GB/T
6529. The treatment conditions are: relative humidity (65 ± 2) %; temperature (21 ±
1) °C; treatment duration shall be at least 4 h.
7 Operating Procedures
7.1 Use a spring clip with the chuck width of (152 ± 10) mm to clamp one end of the
sample on the top of the tester’s bevel. Use another spring clip with the mass of (0.45
± 0.05) kg and the chuck width of (152 ± 10) mm to clamp at the free end of the sample.
7.2 Weigh standard water-absorbent paper, accurate to 0.1 g. Insert it under the
sample.
7.3 Adjust the position of the nozzle, so that the center of the sample is (610 ± 10) mm
below the center of the nozzle surface.
7.4 Promptly and steadily inject (500 ± 10) mL of water (5.3) into the funnel of the tester;
make the water continuously spray onto the sample. When injecting the water into the
funnel, DO NOT generate vortex in the funnel; the spraying time shall be controlled
within 50 s.
7.5 After the entire spraying is finished (2 s after the fluid flow stops), carefully pick up
the sample. Remove the water-absorbent paper, then, quickly weigh it, accurate to 0.1
g.
8 Result and Evaluation
The water resistance test result of each sample is the increase in mass before and
after the test of the water-absorbent paper, expressed in grams (g). The result of
textiles’ water resistance is the average value of the test results of all samples.
When the test result of a single sample or the average test value is larger than 5.0 g,
it may be expressed as “+ 5.0 g” or “> 5.0 g” in the test report.
9 Laboratory Report
Laboratory report shall at least include the following content:
a) Serial No. of this Standard;
b) All the necessary information for the identification of test samples;
c) Quantity of test samples;
d) Environmental conditions (such as: temperature and humidity) of pre-
treatment and tests;
e) Any deviation from the specific test procedures in this Standard;
f) Test result.
Figure 1 -- Type-I Water Permeability Tester
Figure 2 -- Type-II Water Permeability Tester
Unit: millimeter
Keys:
1---glass funnel, 152 mm;
2---ring bracket;
3---metal rod, 12.7 mm;
4---rubber tube, 9.5 mm;
5---metal spring clip;
6---steel plate;
7---base;
8---spray nozzle (see the structure in A in this Figure);
9---25 holes, (0.99 ± 0.0055) mm;
a---brass (texture of sieve plate);
b---bronze (texture of spray nozzle).
Figure 3 -- Structure of Impact Water Permeability Tester
Bibliography
[1] AATCC Test Method 42-2013 Water Resistance: Impact Penetration Test
[2] ISO 18695:2007 Textiles - Determination of Resistance to Water Penetration -
Impact Penetration Test
__________ END __________
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Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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