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GB 20265-2019Foot protection — Footwear protecting against chemicals (English PDF)

足部防护防化学品鞋

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Issued by

SAMR; SAC

Level / Type

National · Mandatory

Issue date

December 31, 2019

Implementation date

July 1, 2020

Scope

GB 20265-2019 is the English-translated version of 足部防护防化学品鞋.

GB 20265-2019 is the Chinese national standard for footwear that protects the wearer's feet from chemicals at work. It sets the terms and definitions, the classification and grading of such footwear, the technical requirements and the test methods, together with the marking and the information the manufacturer has to supply.

The requirements are organised by part of the shoe - whole shoe, upper, lining, tongue, insoles, outsole - and by property, from upper height, bonding strength, water resistance, leakproofness and slip resistance to pH, hexavalent chromium content, tear and abrasion resistance and chemical resistance.

Annex A gives the degradation test. Makers and testing laboratories of chemical-protective footwear use it. It replaces GB 20265-2006 and GB 20266-2006, was issued on 31 December 2019 and has applied since 1 July 2020.

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Document preview — GB 20265-2019

National Standard of the People's Republic of China

ICS: 13.340.50
Classification: C 73
Replacing: GB 20265-2006

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and grading
5 Technical requirements
5.1 General
5.2 Shoe
5.3 Upper
5.4 Lining
5.5 Tongue
5.6 Insoles and insoles
5.7 Outsole
5.8 Chemical resistance
6 Test method
6.1 Sampling and conditioning
6.2 Upper height
6.3 Upper/outsole and midsole bonding strength
6.4 Water resistance
6.5 Leakproofness
6.6 Non-slip properties
6.7 Ergonomic requirements
6.8 Upper thickness
6.9 Upper, liner and tongue tearing performance
6.10 Upper tensile properties
6.11 Upper endurance
6.12 pH
6.13 Hexavalent chromium content
6.14 Water permeability and water absorption
6.15 Abrasion resistance of linings and insoles
6.16 Insole and insole thickness
6.17 Water Absorption and Hydrolytic Absorption
6.18 Insole abrasion resistance
6.19 Outsole thickness
6.20 Tear Strength of Outsole
6.21 Abrasion resistance of outsole
6.22 Fold Resistance of Outsole
6.23 Chemical resistance
7 Identification
8 Information provided by the manufacturer
8.1 General requirements
8.2 Instruction manual and related information
8.3 Chemical resistance
8.4 Insoles
Appendix A (Normative) Degradation Test
References

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB 20265-2006 "Chemical Resistant Industrial Plastic Molded Boots" and GB 20266-2006 "Chemical Resistant Rubber boots for the industry". Compared with GB 20265-2006 and GB 20266-2006, except for editorial changes, the main technical content changes as follows.

--- Added some terms and definitions (see Chapter 3);

--- Increased classification and grading (see Chapter 4);

--- Added technical requirements and related content for Class I products (see Chapter 5);

--- Revised the chemical resistance requirements and test methods (see 5.8 and 6.23, GB 20265-2006 3.8, GB 20266-2006 3.7);

--- Modified the content of the logo (see Chapter 7, GB 20265-2006 Chapter 5, GB 20266-2006 Chapter 5);

--- Added "Information provided by the manufacturer" (see Chapter 8).

1 Scope

This standard specifies the terms and definitions, classification and grading, technical requirements, test methods, identification and information.

This standard applies to footwear that protects the wearer's feet from chemicals during operation.

2 Normative references

The following documents are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 2411 Plastic and hard rubber hardness tester for indentation hardness (Shore hardness)

GB/T 2941-2006 General test procedure for the preparation and adjustment of rubber physical test methods

GB/T 20991-2007 Test methods for personal protective equipment shoes

GB/T 22807 Determination of hexavalent chromium in chemical tests on leather and fur

GB/T 23462-2009 Test method for chemical substance penetration of protective clothing

GB/T 28287 Test method for slip resistance of foot protection shoes

HG/T 2581.1-2009 Determination of tear resistance of rubber or plastic coated fabrics. Part 1. Constant speed tearing method

QB/T 2711 Determination of tear force in physical and mechanical tests of leather. bilateral tear

QB/T 2724 Determination of pH in leather chemical test

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Degradation

Harmful changes in one or more properties of shoe materials due to contact with chemicals.These changes may include. peeling, swelling, breakage Cracking, embrittlement, discoloration, deformation, appearance change, hardening and softening.

3.2 Permeation

The process of chemicals passing through the shoe material at the molecular level.This process includes. adsorption of chemical molecules in contact with the (outer) surface of the material;

Diffusion of adsorbed molecules in a material; desorption of molecules from another (inner) surface of the material.

3.3 Test chemicals

Chemicals or mixtures of chemicals used to determine changes in transmission time and performance under laboratory conditions. The human body has an adverse effect.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 21 pages — is available in the English PDF.

Referenced standards

Normative references

Cited by

Editions of GB 20265

Edition	Title	Revision	Status
GB 20265-2019	Foot protection — Footwear protecting against chemicals	current edition	Current
GB 20265-2006	Foot protection — Footwear protecting against chemicals	previous edition	Superseded

This page sells the current edition, GB 20265-2019. Earlier editions are listed for reference only.

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