GB 9656-2021 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB 9656-2021 | English | 430 |
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Safety technical specification for glazing materials used in power-driven vehicles
| Valid |
| GB 9656-2003 | English | 125 |
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Safety glazing materials for road vehicles
| Obsolete |
| GB 9656-1996 | English | 719 |
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Safety glasses for road vehicles (applicable for certification)
| Obsolete |
| GB 9656-1988 | English | RFQ |
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Safety glasses for road vehicles (for certification)
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GB 9656-2021: Safety technical specification for glazing materials used in power-driven vehicles
---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/GB9656-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
T 26
Replacing GB 9656-2003
Safety technical specification for glazing materials
used in power-driven vehicles
Issued on. APRIL 30, 2021
Implemented on. JANUARY 01, 2023
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword... 4
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Classification... 11
5 Technical requirements... 11
6 Test methods... 19
7 Determination rules... 21
Appendix A (Normative) Determination of the windscreen test area... 23
Appendix B (Normative) Individual determination rules for inspection items.. 33
Bibliography... 40
1 Scope
This Standard specifies the terms and definitions, classification, technical
requirements, test methods, and determination rules related to the safety
features of glazing materials used in power-driven vehicles.
This Standard applies to glazing materials used in power-driven vehicles
including categories M, N, O, as well as category L vehicles with cabs, and
special vehicles for agriculture and forestry.
This Standard does not apply to glazing materials used in lighting, signaling
devices and instrument panels of power-driven vehicles.
Note. See GB/T 15089 for the classification of category L, M, N and O vehicles.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 5137.1 Test methods of safety glazing materials used on road vehicles
- Part 1.Mechanical properties tests
GB/T 5137.2 Test methods of safety glazing materials used on road vehicles
- Part 2.Optical properties tests
GB/T 5137.3 Test methods of safety glazing materials used on road vehicles
- Part 3.Radiation, high temperature, humidity, fire and simulated weathering
resistance tests
GB/T 5137.5 Test methods of safety glazing materials used on road vehicles
- Part 5.Resistant-to-chemical and resistant-to-temperature changes test
GB/T 31849-2015 Film mounted motor vehicle glass
QC/T 1119-2019 Automobile safety glass terminology
3 Terms and definitions
The terms and definitions defined in QC/T 1119-2019 and the following ones
apply to this document. For ease of use, some terms and definitions in QC/T
1119-2019 are listed repeatedly below.
3.1 Power-driven vehicle
A wheeled vehicle which is driven or towed by a power unit and running on the
road for people to ride or to transport objects and perform special engineering
operations.
3.2 Safety glazing material
A transparent material, used in vehicles, which is processed or compounded by
inorganic materials and/or organic materials. It can effectively reduce the
possibility of personal injury; has a certain field of view, strength and durability.
[QC/T 1119-2019, definition 2.1.1]
3.3 Glazing materials used in power-driven vehicles
Safety glazing materials installed on power-driven vehicles to provide the driver
and occupants with an observation field of view, daylighting, separation of
compartment space, or other functions.
3.4 Tempered safety glass
A safety glazing material which is made of single-layer glass through special
heat treatment to increase its mechanical strength and be able to control its
fragmentation state after being broken.
[QC/T 1119-2019, definition 2.1.4]
3.5 Laminated safety glass
A safety glazing material which is made of two or more layers of glass glued
with one or more intermediate layers.
[QC/T 1119-2019, definition 2.1.5]
3.6 Glass-plastic safety glazing material
It is composed of one or more layers of inorganic materials and one or more
layers of organic materials. The side facing passengers after installation is
made of organic materials.
[QC/T 1119-2019, definition 2.1.2]
4 Classification
4.1 According to the production processing technology and/or material, glazing
materials used in power-driven vehicles are classified into laminated safety
glass, tempered safety glass, insulating safety glazing unit, glass-plastic safety
glazing material, rigid plastic glazing pane, and safety glazing faced with plastic
material.
4.2 According to the application location, glazing materials used in power-driven
vehicles are classified into windscreen and glass panes other than windscreen.
5 Technical requirements
5.1 General
5.1.1 Laminated safety glass, glass-plastic safety glazing material, and
tempered safety glass are suitable for any part of power-driven vehicles. When
tempered safety glass is used for the windscreen, it is only suitable for vehicles
with a design speed of less than 40 km/h. Insulating safety glazing unit and rigid
plastic glazing pane are suitable for any part other than the windscreen.
5.1.2 Laminated safety glass, tempered safety glass or insulating safety glazing
unit used for substrates of safety glazing faced with plastic material shall comply
with the relevant provisions of this Standard.
5.1.3 The safety technical requirements for glazing materials used in power-
driven vehicles include visual field safety requirements, strength safety
requirements, damage safety requirements, and environmental durability safety
requirements.
5.2 Visual field safety requirements
5.2.1 Visible light transmittance
5.2.1.1 The visible light transmittance of the windscreen shall meet the
requirements of Table 1.The visible light transmittance of the glass panes other
than windscreen used for the driver’s vision area shall not be less than 70%.
5.2.2 Secondary image deviation
5.2.2.1 The deviation of the secondary image of the windscreen shall meet the
requirements of Table 2.For the part where the 100 mm area inward from the
window opening enters the area I or the expanded area A, the maximum
deviation of the secondary image shall not be greater than 25'.
5.2.2.2 No inspection is performed for the 25 mm area inward from the window
opening or the inner edge of the black border. This area cannot enter area I or
the expanded area A. For the windscreen with a separation column in the center,
the 35 mm area adjacent to the separation column will not be inspected.
5.2.3 Optical distortion
5.3 Strength safety requirements
5.3.1 Human head model impact performance
5.3.2 Penetration resistance
For the laminated safety glass and glass-plastic safety glazing material for the
windscreen, within 5 s after the impact, the steel ball shall not penetrate the
specimen.
5.3.3 Impact resistance
5.3.3.1 For laminated safety glass for windscreen, the specimen after impact
shall meet the following requirements.
5.4 Damage safety requirements
6 Test methods
6.1 General
If the inspection item does not affect the performance of the specimen, the
specimen can be used to continue the test of other items. When using a special
test piece for testing, the test piece shall be produced with the same thickness,
the same material, and the same process conditions as the product.
6.2 Tests of visual field safety performance
6.2.1 Visible light transmittance
According to the method specified in GB/T 5137.2, carry out the test. When the
product is used as the sample, measure the flat part of the test area. For the
head-up display windscreen product, measure the flat and thicker part of the
test area.
6.2.2 Optical distortion
According to the method specified in GB/T 5137.2, carry out the test. When the
position of the window opening cannot be clearly indicated on the surface of the
windscreen, the edge of the windscreen shall prevail.
6.2.3 Secondary image deviation
According to the method specified in GB/T 5137.2, carry out the test. When the
position of the window opening cannot be clearly indicated on the surface of the
windscreen, the edge of the windscreen shall prevail.
6.3 Tests of strength safety performance
6.3.1 Human head model impact performance
According to the method specified in GB/T 5137.1, carry out the test. For
laminated safety glass, glass-plastic safety glazing material, and insulating
safety glazing unit, carry out a human head model impact test without
deceleration measurement. For rigid plastic glazing pane, carry out a human
head model impact test with deceleration measurement.
6.3.2 Penetration resistance
According to the method specified in GB/T 5137.1, carry out the test.
6.3.3 Impact resistance
According to the method specified in GB/T 5137.1, carry out the test. Rigid
plastic glazing pane is only subjected to low temperature test.
6.4 Tests of damage safety performance
6.5 Tests of environmental durability safety performance
6.5.1 Wear resistance
According to the method specified in GB/T 5137.1, carry out the test. For
products with a thickness of more than 20 mm, a flat test piece made of the
material of the surface to be ground of the product can be used as the specimen.
The condition of the surface to be ground of the specimen shall be the same as
that of the product. For safety glazing faced with plastic material, a 100 mm×100
mm film is attached to a 3 mm flat glass of the same size with a visible light
transmittance of (89±1)%, to make specimens. The number of specimens is 3
pieces. The equipment and procedures of the test shall meet the requirements
of GB/T 5137.1.The surface to be ground is the film surface. The number of
revolutions is 100 r.
6.5.2 Heat resistance
According to the method specified in GB/T 5137.3, carry out the test.
6.5.3 Radiation resistance
According to the method specified in GB/T 5137.3, test the laminated safety
glass and glass-plastic safety glazing material. And calculate the ratio of visible
light transmittance after the test to the visible light transmittance before the test,
expressed as a percentage, accurate to one decimal place. According to the
method specified in 6.10 of GB/T 31849-2015, test the safety glazing faced with
plastic material.
6.5.4 Humidity resistance
6.5.5 Resistant-to-temperature changes
According to the method specified in GB/T 5137.5, carry out the test.
6.5.6 Simulated weathering resistance
According to the method specified in GB/T 5137.3, carry out the test. And
calculate the ratio of visible light transmittance after the test to visible light
transmittance before the test, expressed as a percentage, accurate to one
decimal place.
6.5.7 Volatile organic compounds
According to the method specified in Appendix C of GB/T 31849-2015, carry
out the test.
7 Determination rules
7.1 Individual determination
The individual determination of each safety performance inspection item shall
be carried out in accordance with the provisions of Appendix B.
7.2 Comprehensive determination
When all the safety performance meets the requirements, the safety
performance of the product is determined as conformity; otherwise it is
nonconformity.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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