GB/T 42714-2023General specification for electromagnetic shielding heat-shrinkable tubes (English PDF)

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.

1 Scope

This document specifies the classification, technical requirements, inspection rules, marking, packaging, transportation and storage requirements of electromagnetic shielding heat shrinkable tubes, and describes corresponding test methods.

This document is applicable to the production and quality control of heat shrinkable tubes with electromagnetic shielding function within the frequency range of 14kHz~10GHz.

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 1040.2-2022 Determination of tensile properties of plastics - Part 2: Test conditions for molded and extruded plastics

GB/T 1551 Determination of Resistivity of Silicon Single Crystal Inline Four-Probe Method and DC Two-Probe Method

GB/T 1771 Determination of neutral salt spray resistance of paints and varnishes

GB/T 2406.2-2009 Determination of combustion behavior of plastics by oxygen index method - Part 2: Room temperature test

GB/T 2423.22-2012 Environmental testing - Part 2: Test methods Test N. Temperature change

GB/T 7141 Plastic heat aging test method

GB/T 26667-2021 Terminology of Electromagnetic Shielding Materials

GB/T 30142-2013 Measurement method for shielding effectiveness of planar electromagnetic shielding materials

GB/T 31838.2 Dielectric and resistance properties of solid insulating materials Part 2: Resistance properties (DC method) Volume resistance and volume resistivity

DL/T 1059-2007 Heat-shrinkable tubes for power equipment busbars

JB/T 7829-2006 Rated voltage 1kV (Um=1.2kV) to 35kV (Um=40.5kV) power cable heat shrinkable terminal

3 Terms and Definitions

GB/T 26667-2021, DL/T 1059-2007 and the following terms and definitions apply to this document.

3.1 The use of conductive, magnetic or both conductive and magnetic materials to reduce or block the propagation of electromagnetic fields to designated areas. [Source: GB/T 26667-2021, 3.1.6]