GB 28881-2023 PDF English
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Hand protection - Protective gloves against chemicals and micro-organisms
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| GB 28881-2012 | English | 220 |
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GB 28881-2023: Hand protection - Protective gloves against chemicals and micro-organisms---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GB28881-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 13.340.40
CCS C 73
Replacing GB 28881-2012
Hand protection -- Protective gloves against chemicals and
micro-organisms
Issued on. DECEMBER 28, 2023
Implemented on. JANUARY 01, 2025
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 5
4 Technical requirements... 6
5 Test methods... 9
6 Marks... 10
7 Information provided by manufacturer... 11
Annex A (normative) Test method for penetration resistance... 14
Bibliography... 19
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document replaces GB 28881-2012 "Hand protection - Protective gloves against
chemicals and micro-organisms". Compared with GB 28881-2012, in addition to
structural adjustments and editorial changes, the main technical changes are as follows.
- Changed the scope (see Chapter 1 of this Edition; Chapter 1 of Edition 2012);
- Changed some terms and definitions (see Chapter 3 of this Edition; Chapter 3 of
Edition 2012);
- Deleted the general provisions (see 4.1 of Edition 2012);
- Added the technical requirements and classification of protective gloves against
chemicals (see 4.1 of this Edition);
- Added the general protection requirements that should comply with the provisions
of GB 42298-2022 (see 4.1.2, 4.2.2 of this Edition);
- Changed the technical requirements for permeation resistance performance (see
4.1.4 of this Edition; 4.3.2 of Edition 2012);
- Added nitric acid, acetic acid, ammonium hydroxide, hydrogen peroxide,
hydrofluoric acid, formaldehyde and other permeation resistance performance
test chemicals (see Table 1 of this Edition);
- Changed the technical requirements for mechanical properties (see 4.1.5, 4.2.4 of
this Edition; 4.4 of Edition 2012);
- Changed the table of wear resistance, cut resistance, tear resistance and puncture
resistance in mechanical properties (see Table 3 of this Edition; see Table 3, Table
4, Table 5, Table 6 of Edition 2012);
- Deleted the ergonomic requirements (see 4.2 of Edition 2012);
- Added the technical requirements for protective gloves against micro-organisms
(see 4.2 of this Edition);
- Deleted the test methods for hand and glove size and dexterity (see 5.1 and 5.2 of
Edition 2012);
- Added the test methods for general protection requirements (see 5.1 of this Edition);
- Added additional sampling requirements in the permeation resistance performance
test method (see 5.3 and Figure 1 of this Edition);
- Changed the test methods for mechanical properties (see 5.4 of this Edition; 5.5,
5.6, 5.7, 5.8 of Edition 2012);
- Changed the requirements for marking (see Chapter 6 of this Edition; 6.1 of Edition
2012);
- Changed the information provided by the manufacturer (see Chapter 7 of this
Edition; 6.2 of Edition 2012);
- Partially changed the description of the air tightness test device and the liquid
tightness test device (see A.3 of this Edition; A.4 of Edition 2012);
- Partially changed the description of the air tightness test method and the liquid
tightness test method (see A.4 of this Edition; A.5 of Edition 2012).
Attention is drawn to the possibility that some of the elements of this document may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
This document was proposed by and shall be under the jurisdiction of Ministry of
Emergency Management of the People's Republic of China.
Versions of standard substituted by this document are.
- It was first published in 2012 as GB 28881-2012;
- This is the first revision.
Hand protection -- Protective gloves against chemicals and
micro-organisms
1 Scope
This document defines terms and definitions for protective gloves against chemicals
and micro-organisms, specifies technical requirements, labeling and information to be
provided by the manufacturer, and describes test methods.
This document applies to gloves for protective gloves against chemical and micro-
organism hazards.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
GB/T 23462-2009, Protective clothing -- Test method for chemical protective
materials to permeation by chemicals
GB 24541-2022, Hand protection -- Protective gloves against mechanical risks
GB 42298-2022, Hand protection -- General technical specifications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 protective gloves against chemicals
Gloves that protect the wearer's hands from chemicals.
3.2 protective gloves against micro-organisms
Protective gloves that can form an effective barrier against all types of microorganisms,
excluding viruses, thereby preventing their penetration.
3.3 degradation
Contact with chemicals may cause destructive changes in one or more of the properties
of protective gloves.
NOTE. Including peeling, expansion, fragmentation, embrittlement, fading, deformation,
hardening and softening.
3.4 penetration
The process by which chemicals and/or microorganisms penetrate protective gloves at
a non-molecular level through defects such as pores, seams, pinholes, etc. in the
protective glove material.
3.5 permeation
The process by which chemical molecules are adsorbed by the protective glove material,
diffuse within the material, and precipitate from the other side of the material.
3.6 test chemicals
Chemicals or chemical mixtures used to determine the permeation properties of
protective glove materials under laboratory conditions.
3.7 normalized breakthrough time
The time from the start of the test until the chemical permeation rate (permeation
amount) reaches the standard permeation rate (permeation amount).
4 Technical requirements
4.1 Protective gloves against chemicals
4.1.1 General
Protective gloves against chemicals should meet the technical requirements of general
protection requirements (4.1.2), penetration resistance (4.1.3), permeation resistance
(4.1.4) and mechanical properties (4.1.5).
Protective gloves against chemicals are divided into Type A, Type B and Type C
according to the number of test chemicals and the level of permeation resistance
performance of each test chemical.
4.1.2 General protection requirements
Protective gloves against chemicals should comply with the requirements of Chapter 5
of GB 42298-2022 according to the grade and applicability of the product.
4.1.3 Penetration resistance performance
When the protective gloves against chemicals are tested according to the method
specified in 5.2, no leakage should occur.
4.1.4 Permeation resistance performance
4.1.4.1 Type A protective gloves against chemicals
Type A protective gloves against chemicals should be tested with the 6 test chemicals
listed in Table 1 based on the information provided by the manufacturer. The test should
be carried out according to the method specified in 5.3.The permeation resistance
performance level of each test chemical should not be less than Level 2 in Table 2.
4.1.4.2 Type B protective gloves against chemicals
Type B protective gloves against chemicals should be tested with the 3 test chemicals
listed in Table 1 based on the information provided by the manufacturer. The test should
be carried out according to the method specified in 5.3.The permeation resistance
performance level of each test chemical should not be less than Level 2 in Table 2.
4.1.4.3 Type C protective gloves against chemicals
Type C protective gloves against chemicals shall be tested with 1 of the test chemicals
listed in Table 1 based on the information provided by the manufacturer. The test shall
be carried out in accordance with the method specified in 5.3.The permeation resistance
level of each test chemical shall not be less than Level 1 in Table 2.
4.1.5 Mechanical properties
Protective gloves against chemicals are tested according to the method specified in 5.4
based on the mechanical property level of the product. At least one of the abrasion
resistance, cut resistance (disc knife test method), tear resistance and puncture
resistance should reach level 1 listed in Table 3.
4.2 Protective gloves against micro-organisms
4.2.1 General
Protective gloves against micro-organisms should meet the general protection
requirements (4.2.2), penetration resistance (4.2.3) and mechanical properties (4.2.4)
requirements.
4.2.2 General protection requirements
Protective gloves against micro-organisms should comply with the requirements of
Chapter 5 of GB 42298-2022 according to the level and applicability of the product.
4.2.3 Penetration resistance performance
When the microbial protective gloves are tested according to the method specified in 5.2, no leakage should occur.
5 Test methods
5.1 General protection requirements
The test shall be carried out according to the method specified in Chapter 5 of GB42298-2022 based on the grade and applicability of the product.
5.2 Penetration resistance performance
Perform the test as specified in Annex A.
5.3 Permeation resistance performance
Cut 3 specimens from the palm of the glove. If the glove length is greater than or equal
to 400 mm and the cuff material is claimed to have chemical protection performance,
an additional 3 specimens should be cut 80 mm from the end of the cuff (see Figure 1).
If there is a seam in the hand area, at least 1 specimen should include the seam. If the
chemical protection glove material adopts a multi-layer structure and there are other
material layers on the chemical protection layer, remove other material layers as much
as possible, such as the thermal insulation layer, without destroying the chemical
protection layer.
6 Marks
6.1 Protective gloves against chemicals
6.1.1 The marks of protective gloves against chemicals shall comply with the requirements of 6.1 of GB 42298-2022.
6.1.2 The mark of protective gloves against chemicals should include a mechanical
property icon, which should be marked on the glove body. The mechanical property
icon should comply with the requirements of 7.2 in GB 24541-2022.
6.1.3 The protective gloves against chemicals shall be marked with the classification
icons of protective gloves against chemicals (see Table 4) and marked on the gloves.
The test chemicals for penetration resistance performance shall be marked below the
corresponding icons and indicated by the numbers in Table 1.
6.2 Protective gloves against micro-organisms
6.2.1 The marks of microbial protective gloves shall comply with the requirements of
6.1 of GB 42298-2022.
6.2.2 The mark of microbial protective gloves should include a mechanical property
icon,
7 Information provided by manufacturer
7.1 Protective gloves against chemicals
The information of protective gloves against chemicals should comply with the
requirements of 6.2 of GB 42298-2022 and should include the following.
7.2 Protective gloves against micro-organisms
The information of microbial protective gloves should comply with the requirements
of 6.2 of GB 42298-2022 and should include the following.
- Mechanical property level;
- Application scope and limitations of protective gloves;
- Methods for selecting protective gloves of appropriate size;
- Inspection method before using protective gloves;
- Wearing method of protective gloves and/or precautions for matching with other
protective equipment;
- If applicable, maintenance method of protective gloves.
In addition to the above information, the manufacturer should also provide the
following warnings.
- The test results do not reflect the actual protection period in the workplace.
- The penetration resistance is only tested under laboratory conditions and only
relates to the test specimen.
- It is recommended to check whether the gloves are suitable for the intended use.
The conditions in the workplace may differ from the type test due to objective
factors such as temperature changes, the occurrence of wear and degradation of
the glove material.
Annex A
(normative)
Test method for penetration resistance
A.1 Principle
A.1.1 Principle overview
The penetration resistance performance test methods include air tightness test and liquid
tightness test. Among them, the air tightness test method is the preferred method.
However, during the inflation process of the air tightness test of some protective gloves,
some parts are extremely inflated while other parts are not fully inflated or even cannot
take in air. Therefore, it is not suitable to use air tightness test, and only liquid tightness
test can be used.
A.1.2 Air tightness test
Immerse the gloves filled with a certain pressure of air in water. If a series of bubbles
appear on the surface of the gloves, it means that the gloves are leaking.
A.1.3 Liquid tightness test
Fill the glove with water. If water seeps out of the glove surface, it means the glove is
leaking.
A.2 Sampling
Take 1 glove of each size and at least 4 gloves for each test.
A.3 Test device
A.3.1 Air tightness test device
The schematic diagram of the air tightness test device is shown in Figure A.1, which
mainly includes the following parts.
a) Fixing device. the upper part of the frustum is connected to the air pressure
regulating device; the lower part can rotate 180° around the axis; it can keep the
test gloves airtight; its enlarged schematic diagram is shown in Figure A.2;
b) Air pump. can provide a pressure of 0 kPa~10 kPa;
c) Water tank. the size should meet the test requirements;
d) Pressure gauge. the measurement range is 0 kPa~10 kPa; the measurement
accuracy is 0.1 kPa;
e) Air pressure regulating device.
A.4 Test method
A.4.1 Sample preparation
Remove the test gloves. Record the name, model, batch number, size and brand
information of the gloves. Visually inspect the gloves. If the gloves have rips, tears or
holes, report the gloves as unacceptable.
A.4.2 Air tightness test
Fix the gloves on the fixture and immerse them in water at room temperature. Inflate
the gloves according to Table A.1 and keep it for 2 min [the inflation pressure
fluctuation in the gloves shall not exceed ±10%. When observing the possible bubbles,
the test time may be extended for a certain period of time, but it shall not exceed (30±5)
s]. For every 100 mm increase in the distance between the glove fingertips and the water
surface, the pressure shall be increased by 1 kPa. For example, if the glove fingertips
are immersed in water at a depth of 250 mm, the inflation pressure in the gloves shall
be increased by 2.5 kPa on the basis of Table B.1.
A.5 Result recording
The result record should include the following.
a) Complete identification information of the tested gloves;
b) Visual inspection results;
c) Test conditions;
d) Air tightness test or liquid tightness test results;
e) Explanation of no test.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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