GB/T 23463-2009Protective clothing - Protective clothing against microwave radiation (English PDF)

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 replaces GB/T 23463-2009 "Protective Clothing - Microwave Radiation Protective Clothing". Compared with GB/T 23463-2009, except for the following.

Aside from structural adjustments and editorial changes, the main technical changes are as follows.

---The scope has been changed (see Chapter 1, Chapter 1 of the 2009 edition);

---Added terms and definitions for "microwave," "dynamic range," and "human model" (see 3.1~3.3);

---The terms and definitions of "occupational exposure" and "exposure limits" have been removed (see 3.1 and 3.2 in the 2009 edition);

---The protection levels have been changed (see Table 1, Table 2 in the 2009 edition);

---The testing method for shielding effectiveness has been changed (see 5.1, 5.1 and 5.13 in the 2009 version);

---The requirements for marking have been changed (see Chapter 6, Chapter 6 of the 2009 edition);

---Rename Appendix A to "Shielding Effectiveness Test Methods" (see Appendix A, Appendix A of the 2009 edition);

---A normative appendix, "General Requirements for Human Models," has been added (see Appendix B).

Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents.

This document was proposed and is under the jurisdiction of the Ministry of Emergency Management of the People's Republic of China.

The release history of this document and the document it replaces is as follows.

---First published in 2009 as GB/T 23463-2009;

---This is the first revision.

Microwave radiation protective clothing

1 Scope

This document specifies the technical requirements, labeling, and manufacturing requirements for microwave radiation protective clothing applicable to the frequency range of 300MHz~40GHz.

The information provided by the vendor describes the testing method.

This document applies to reflective microwave radiation protective clothing produced using methods such as metal fiber blending and fabric metallization. It also applies to...

Microwave-absorbing protective clothing that uses microwave-absorbing materials to attenuate microwave radiation.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 3917.3 Textiles - Tear Properties of Fabrics - Part 3: Determination of Tear Strength of Trapezoidal Specimens GB/T 3920 Textiles - Tests for color fastness - Color fastness to rubbing GB/T 3921 Textiles - Tests for color fastness - Color fastness to washing GB/T 3923.1 Textiles - Tensile properties of fabrics - Part 1: Determination of breaking strength and elongation at break (strip method) GB/T 12190-2021 Measurement Method for Shielding Effectiveness of Electromagnetic Shielding Room GB/T 12903 Terminology for Personal Protective Equipment GB.20097 General Technical Specification for Protective Clothing GB/T 21294 Test methods for physical and chemical properties of clothing

3 Terms and Definitions

The terms and definitions defined in GB/T 12903 and the following terms and definitions apply to this document.

microwave

Electromagnetic waves with frequencies in the range of 300MHz to 300GHz.

Note. Microwaves include pulsed microwaves and continuous microwaves.

dynamic range

The amplitude range of the receiving system operating in the linear region is equal to the difference between the maximum and minimum signal values.

human model phantommanmodel Made of low-loss, low-dielectric-constant electromagnetic wave-transparent material, this complete plastic dummy includes a head, torso, and limbs.

Under the same electromagnetic field environment and detection location, the electric field strength E0 at a certain point on the human model when not wearing microwave radiation protective clothing is different from that when wearing it.

The electric field strength E1 after wearing microwave radiation protective clothing is compared and expressed logarithmically.

SE=20lg

In the formula.

SE --- Shielding effectiveness, measured in decibels (dB);

E0 --- Electric field strength when not wearing microwave radiation protective clothing, measured in volts per meter (V/m);

E1 --- Electric field strength when wearing microwave radiation protective clothing, measured in volts per meter (V/m).

4 Technical Requirements