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GB/T 37977.49-2023: Electrostatics - Part 4-9: Standard test methods for specific applications - Garments
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Electrostatics - Part 4-9: Standard test methods for specific applications - Garments
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Basic data
| Standard ID | GB/T 37977.49-2023 (GB/T37977.49-2023) |
| Description (Translated English) | Electrostatics - Part 4-9: Standard test methods for specific applications - Garments |
| Sector / Industry | National Standard (Recommended) |
| Classification of Chinese Standard | L04 |
| Classification of International Standard | 17.220.20 |
| Word Count Estimation | 26,290 |
| Date of Issue | 2023-12-28 |
| Date of Implementation | 2024-04-01 |
| Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration |
GB/T 37977.49-2023: Electrostatics - Part 4-9: Standard test methods for specific applications - Garments
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 17:220:20
CCSL04
National Standards of People's Republic of China
Electrostatics Part 4-9: Standards for specific applications
Test methods clothing
Garments
(IEC 61340-4-9:2016, MOD)
Published on 2023-12-28
2024-04-01 Implementation
State Administration for Market Regulation
Released by the National Standardization Administration Committee
Table of contents
Preface III
Introduction IV
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Washing and testing environmental conditions 2
4:1 General 2
4:2 Low humidity 2
4:3 Normal humidity 2
5 Equipment and Materials 2
5:1 Resistance testing instrument 2
5:2 Resistance test electrode 3
5:3 Support plate 4
6 test 5
6:1 Sample preparation 5
6:2 Humidity requirements 5
6:3 Washing 5
6:4 Test procedure 5
7 Product Certification10
8 Test Report 11
Appendix A (Informative) Clothing Type and Resistance Value 12
Appendix B (Normative) Washing Method 13
B:1 Equipment 13
B:2 Detergent13
B:3 Washing conditions 13
B:4 Washing program 13
Appendix C (Informative) Data Record Collection Form (Example) 14
Reference 16
Figure 1 Clip electrode for suspended garment testing 3
Figure 2 Cuff test fixture for groundable anti-static clothing 4
Figure 3 Using meters and hand-held electrodes to test the resistance of groundable anti-static clothing and its schematic diagram 4
Figure 4 Detailed diagram of insulating strips inserted into sleeves 6
Figure 5 Schematic diagram of sleeve-to-sleeve point-to-point resistance test (two plug-in insulating strips inserted into two sleeves) 6
Figure 6 Schematic diagram of chip-to-chip point-to-point resistance test (supported by an insulating support plate) 7
Figure 7 Detailed diagram of test electrode insertion into cuff 7
Figure 8 Schematic diagram of cuff-to-cuff point-to-point resistance test (test electrode inserted into cuff) 8
Figure 9 Schematic diagram of cuff-to-cuff point-to-point resistance test (clip electrode suspension method) 8
Figure 10 Schematic diagram of resistance test of sleeve to grounding point 9
Figure 11 Schematic diagram of resistance test between cuff and grounding point 9
Figure 12 Schematic diagram of using a comprehensive tester to test the resistance of groundable anti-static clothing combined with the human body10
Table 1 Product Certification10
Table A:1 Clothing types and resistance values 12
Table B:1 Washing conditions 13
Table B:2 Washing program 13
Table C:1 Data collection table example 14
Foreword
This document complies with the provisions of GB/T 1:1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents"
Drafting:
This document is Part 4-9 of GB/T 37977 "Electrostatics": GB/T 37977 has released the following parts:
---Part 2-1: Test methods Materials and products electrostatic charge dissipation ability;
---Part 2-3: Test methods for resistance and resistivity of antistatic solid planar materials;
---Part 3-2: Simulation method of electrostatic effects and electrostatic discharge test waveform of machine model (MM);
---Part 4-8: Standard test methods for electrostatic discharge shielding bags in specific applications;
---Part 4-9: Standard test methods for clothing in specific applications;
---Part 5-1: General requirements for electrostatic protection of electronic devices:
This document is modified to adopt IEC 61340-4-9:2016 "Electrostatics Part 4-9: Standard test methods for clothing in specific applications":
Compared with IEC 61340-4-9:2016, this document has made the following structural adjustments:
---Delete the original "5:1 Test Equipment Requirements" and change "5:1:1 Resistance Test Instruments" to "5:1 Resistance Test Instruments": All clauses in Chapter 5
Move up one level;
---The content of "6:3 Cleaning" has been added to the preprocessing, and the original "6:3 Test Procedure" has been adjusted to 6:4;
---Added Appendix B (normative) "Washing Method" and adjusted the original Appendix B to Appendix C:
The technical differences between this document and IEC 61340-4-9:2016 and their reasons are as follows:
---In order to adapt to my country's technical conditions and facilitate the use of standards, GB/T 37977:23 is normatively cited instead of IEC 61340-2 (see
5:3:1);
---Added "6:3 Cleaning" as a pre-treatment to evaluate the long-term durability of clothing (see 6:3), and added a new normative appendix C "Washing Method"
Law";
---Added reference to GB/T 8629 to adapt to my country's actual requirements (see Appendix B):
The following editorial changes have been made to this document:
---The figures in this document have been redrawn, and they have been retyped and numbered according to the order in which they appear in the text of this document;
---List 6:4:2:1, 6:4:2:2, and 6:4:2:3 of this document in accordance with the test steps:
Please note that some content in this document may be subject to patents: The publisher of this document assumes no responsibility for identifying patents:
This document is proposed and administered by the Ministry of Industry and Information Technology of the People's Republic of China:
This document was drafted by: China Electronics Technology Standardization Institute, Suzhou Tianhua New Energy Technology Co:, Ltd:, Zhejiang Yiyuan Electrostatic
Technology Co:, Ltd:, Shenzhen Siteda Technology Co:, Ltd:, Xiamen Kangbao Dust-free Technology Co:, Ltd:, Guangdong Youke Testing Technology Services Co:, Ltd:
Ltd:
The main drafters of this document: Wang Ronggang, Cai Lihua, Zhang Yiyuan, Zha Chunjun, Dai Hongliang, Ma Qitian, and Zhu Xiudong:
Introduction
The GB/T 37977 series of standards are basic standards for electrostatics: They all adopt the IEC 61340 series of international standards to define electrostatic effects:
Simulation methods, anti-static parameter testing methods for anti-static materials and products, standard test methods in specific applications, electrostatic protection of electronic devices
Protect etc: The GB/T 37977 series of standards is planned to consist of 11 parts, consistent with the structure of the IEC 61340 series of standards:
---Part 2-1: Test methods for electrostatic charge dissipation capabilities of materials and products: The purpose is to specify test methods for testing insulation
and the static charge dissipation capabilities of static dissipative materials and products:
---Part 2-3: Test methods for resistance and resistivity of antistatic solid planar materials: The purpose is to specify test methods for measuring
Test the resistance and resistivity of the anti-static solid planar material: The applicable range of the measured resistance is 104Ω~1012Ω:
---Part 3-1: Simulation method of electrostatic effects and electrostatic discharge test waveform of human body model (HBM): The purpose is to specify
Basic requirements for electrostatic discharge current waveforms used to simulate HBM and the equipment used to generate and verify these waveforms:
---Part 3-2: Simulation method of electrostatic effects and electrostatic discharge test waveform of machine model (MM): The purpose is to specify
Basic requirements for simulating electrostatic discharge current waveforms of MM and the equipment used to generate and verify these waveforms:
---Part 4-1: Standard test methods Resistance of floor coverings and assembled floors in specific applications: The purpose is to specify the test
This test method is used to test the resistance of floor coverings and assembled floors, including ground resistance, point-to-point resistance and vertical resistance: It is
The applicable range of resistance measurement is 104Ω~1013Ω:
---Part 4-3: Standard test methods for footwear in specific applications: The purpose is to specify test methods for testing anti-static shoes
The resistance:
---Part 4-5: Standard test methods for characterization of electrostatic protection characteristics of human/shoe/ground systems in specific applications: The purpose is
It is a prescribed test method for evaluating the anti-static performance of the person/shoe/ground system:
---Part 4-6: Standard test methods for wristbands in specific applications: The purpose is to clarify the electrical and mechanical performance requirements of the wristband:
requirements, and experimental methods for testing these properties:
---Part 4-8: Standard test methods for electrostatic discharge shielding bags in specific applications: The purpose is to provide evaluation of electrostatic discharge screens
Test method for bag performance:
---Part 4-9: Standard test methods for clothing in specific applications: The purpose is to specify test methods for testing anti-static clothing
installed resistor:
---Part 5-1: General requirements for electrostatic protection of electronic devices: The purpose is to establish anti-static management and technical requirements to avoid or
Reduce damage to electronic products due to electrostatic discharge:
Clothes made of chemical fibers are a common source of static electricity: Wear appropriate anti-static clothing over personal clothing to minimize the effects of electrical charges
Low: To effectively control static electricity, anti-static clothing should be grounded as much as possible:
This document describes the following three categories of clothing:
a) In an ungrounded environment, anti-static clothing inhibits or affects the electric field of ordinary clothing inside it: However, since there is no ground, the electrical
Charge may accumulate on its conductive or dissipative parts (if present):
b) Groundable anti-static clothing provides a higher level of control by grounding the low resistance fabric:
c) Groundable anti-static clothing systems provide a grounding path for the wearer: It works by inhibiting clothing worn on the inside of grounded anti-static clothing:
The electric field is generated and connects the wearer's skin to a defined ground path: Groundable anti-static clothing systems are also available with continuous
Or used with a continuous monitoring system in a manner similar to the continuous monitoring of wristbands within an anti-static work area (EPA):
Resistive performance is only one aspect of evaluating apparel applications: In order to fully evaluate the performance of the garment, it may also be necessary to consider electric field attenuation, static
Performance in terms of electrical attenuation, peak voltage, residual voltage and triboelectric charging: Other properties relevant to the application and environment, such as clean rooms
Compatibility, chemistry, and flame retardancy are all evaluated during the garment selection process, but these are outside the scope of this document:
Clothing made from fibers that are not conductive but may have other similar properties may produce some degree of electrical shock when connected to the ground:
Electrostatic charge dissipation or suppression: The methods provided in this document are not suitable for testing such garments:
It should be noted that some clothing fabrics and structures may have surface voltage accumulation and charge transfer, which may cause damage to electronic products:
damage:
Electrostatics Part 4-9: Standards for specific applications
Test methods clothing
1 Scope
This document provides resistance test methods for anti-static clothing: These methods are suitable for evaluating clothing that uniformly conducts static electricity or uniformly dissipates static electricity:
clothing, or clothing that uses components or parts with static conductive or static dissipative surfaces:
Note: The test methods specified in this document may not be applicable to clothing with embedded conductive layers:
The point-to-point resistance test method is to test between two cuffs, between any two pieces, and any two or more electrical connections on the garment:
Resistance between pieces, including resistance at garment seams and cuffs (where applicable):
Allows the sleeve-to-sleeve resistance testing method to be performed by hanging the garment using clips:
Point-to-point resistance, point-to-ground point resistance and system tests are used to judge whether the wearer is electrically connected to and provides a path to ground:
Methods for performance of static protective clothing: The system test is to detect the resistance of the wearer to the ground point through the clothing:
When system testing the wearer and groundable anti-static clothing as a whole system, the clothing grounding wire needs to be tested:
NOTE: Appendix A provides some service types and recommended resistor values:
2 Normative reference documents
The contents of the following documents constitute essential provisions of this document through normative references in the text: Among them, the dated quotations
For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to
this document:
GB/T 8629 Home washing and drying procedures for textile testing (GB/T 8629-2017, ISO 6330:2012, MOD)
GB/T 37977:23 Electrostatics Part 2-3: Test methods for resistance and resistivity of antistatic solid planar materials
(GB/T 37977:23-2019,IEC 61340-2-3,IDT)
IEC 61340-4-6 Electrostatics Part 4-6: Standard test methods for specific applications - wrist straps (Electrostatics-Part 4-6:
3 Terms and definitions
The following terms and definitions apply to this document:
3:1
acceptance testingacceptancetesting
Tests used to confirm that products delivered to users meet certification requirements:
3:2
Garment systemgarmentsystem
A system of all electrically interconnected components of anti-static clothing:
3:3
point-to-pointresistancepoint-to-pointresistance
The resistance between two points on the same piece or different pieces (surfaces) of a garment:
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