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GB/T 42718-2023: General technical requirements for electro-conductive material-over-foam gasket
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 42718-2023 | English | 379 |
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General technical requirements for electro-conductive material-over-foam gasket
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GB/T 42718-2023
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PDF similar to GB/T 42718-2023
Basic data | Standard ID | GB/T 42718-2023 (GB/T42718-2023) | | Description (Translated English) | General technical requirements for electro-conductive material-over-foam gasket | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | K04 | | Classification of International Standard | 17.220.99 | | Word Count Estimation | 20,264 | | Date of Issue | 2023-05-23 | | Date of Implementation | 2023-12-01 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 42718-2023: General technical requirements for electro-conductive material-over-foam gasket---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.
ICS17:220:99
CCSK04
National Standards of People's Republic of China
Electromagnetic Shielding Effectiveness of Wrapped Foam Pads
General Technical Requirements
Released on 2023-05-23
2023-12-01 implementation
State Administration for Market Regulation
Released by the National Standardization Management Committee
table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Technical requirements 2
4:1 Shielding effectiveness under working thickness 2
4:2 Resistance under working thickness 2
4:3 Compression set 3
4:4 Flame retardant performance 3
4:5 Environmental requirements 3
4:6 Appearance 4
5 Test method 4
5:1 Test conditions 4
5:2 Shielding effectiveness under working thickness 4
5:3 Resistance under working thickness 4
5:4 Compression set 4
5:5 Flame retardant performance 5
5:6 Environmental requirements 5
5:7 Appearance 5
6 Inspection rules 5
6:1 General Inspection Rules 5
6:2 Inspection classification 5
6:3 Factory inspection 5
6:4 Type inspection 5
7 Labeling, packaging, transportation and storage 6
7:1 Flag 6
7:2 Packaging 6
7:3 Transport 6
7:4 Storage 6
Appendix A (Normative) Test Method for Shielding Effectiveness of Wrapped Foam Pad 7
Appendix B (Normative) Test method for resistance under working thickness of wrapped foam pad 10
Reference 12
foreword
This document is in accordance with the provisions of GB/T 1:1-2020 "Guidelines for Standardization Work Part 1: Structure and Drafting Rules for Standardization Documents"
drafting:
Please note that some contents of this document may refer to patents: The issuing agency of this document assumes no responsibility for identifying patents:
This document is proposed by China Electrical Equipment Industry Association:
This document is under the jurisdiction of the National Standardization Technical Committee on Electromagnetic Shielding Materials (SAC/TC323):
This document was drafted by: Maxim New Materials Co:, Ltd:, Shanghai Institute of Metrology and Testing Technology, Shenzhen Feirongda Technology Co:, Ltd:
Co:, Ltd:, Jiangsu Institute of Quality and Standardization, Institute of Metal Research, Chinese Academy of Sciences, Chengdu Moore Huanyu Testing Technology Co:, Ltd:, Jinan
Zhongzheng New Materials Co:, Ltd:
The main drafters of this document: Chen Weibin, Chen Chaochan, Shi Weiwei, Yu Xiaolei, Ma Song, Chen Nan, Li Changlin, Li Siqing, Miao Yi:
Electromagnetic Shielding Effectiveness of Wrapped Foam Pads
General Technical Requirements
1 Scope
This document specifies the technical requirements, inspection rules, signs, and packaging of foam cushion materials in the frequency range of 10kHz~40GHz:
Requirements for packaging, transportation and storage, and the corresponding test methods are described:
This document applies to the design, production and testing of wrapped foam gasket materials for electromagnetic shielding, grounding, etc: applications:
2 Normative references
The contents of the following documents constitute the essential provisions of this document through normative references in the text: Among them, dated references
For documents, only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
this document:
GB/T 191 Packaging, storage and transportation icon marks
GB/T 2828:1 Counting sampling inspection procedure Part 1: Batch-by-batch inspection sampling plan retrieved by acceptance quality limit (AQL)
GB/T 2829-2002 Sampling procedure and table for periodic inspection counting (applicable to inspection of process stability)
GB/T 5169:16-2017 Fire Hazard Tests for Electrical and Electronic Products Part 16: Test Flame 50W Horizontal and Vertical Fire
Flame test method
GB/T 6669-2008 Determination of compression set of flexible foam polymeric materials
GB/T 26125 Determination of six restricted substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers) in electrical and electronic products
GB/T 26572 Limit Requirements for Restricted Substances in Electrical and Electronic Products
GB/T 26667 Terminology of electromagnetic shielding materials
3 Terms and Definitions
The following terms and definitions defined in GB/T 26667 apply to this document:
3:1
Wrapped foam linerelectro-conductivematerial-over-foamgasket
Shaped conductive foam pad
A type of electromagnetic shielding material that wraps a layer of conductive material outside the foam and fixes it on the working equipment to play the role of electromagnetic shielding or grounding:
3:2
SE
At a certain point under the same excitation, the ratio of the electric field strength, magnetic field strength or power measured when there is a shielding material to that when there is no shielding material:
3:3
initial thickness initialthickness
Ti
The original thickness of the wrap foam pad before compression:
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