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GB 9656-2021: PDF in English

GB 9656-2021
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 
5.1 General ... 11 
5.2 Visual field safety requirements ... 11 
5.2.1 Visible light transmittance ... 11 
5.2.2 Secondary image deviation ... 12 
5.2.3 Optical distortion ... 12 
5.3 Strength safety requirements ... 13 
5.3.1 Human head model impact performance ... 13 
5.3.2 Penetration resistance ... 14 
5.3.3 Impact resistance ... 14 
5.4 Damage safety requirements ... 16 
5.4.1 Fragment state ... 16 
5.4.2 Fire resistance ... 16 
5.4.3 Resistant-to-chemical ... 16 
5.5 Environmental durability safety requirements ... 17 
5.5.1 Wear resistance ... 17 
5.5.2 Heat resistance ... 17 
5.5.3 Radiation resistance ... 17 
5.5.4 Humidity resistance ... 18 
5.5.5 Resistant-to-temperature changes ... 18 
5.5.6 Simulated weathering resistance ... 18 
5.5.7 Volatile organic compounds ... 19 
6 Test methods ... 19 
6.1 General ... 19 
6.2 Tests of visual field safety performance ... 19 
6.2.1 Visible light transmittance ... 19 
6.2.2 Optical distortion ... 19 
6.2.3 Secondary image deviation ... 19 
6.3 Tests of strength safety performance ... 19 
6.3.1 Human head model impact performance ... 19 
6.3.2 Penetration resistance ... 20 
6.3.3 Impact resistance ... 20 
6.4 Tests of damage safety performance ... 20 
6.4.1 Fragment state ... 20 
6.4.2 Fire resistance ... 20 
6.4.3 Resistant-to-chemical ... 20 
6.5 Tests of environmental durability safety performance ... 20 
6.5.1 Wear resistance ... 20 
6.5.2 Heat resistance ... 21 
6.5.3 Radiation resistance ... 21 
6.5.4 Humidity resistance ... 21 
6.5.5 Resistant-to-temperature changes ... 21 
6.5.6 Simulated weathering resistance ... 21 
6.5.7 Volatile organic compounds ... 21 
7 Determination rules ... 21 
7.1 Individual determination ... 21 
7.2 Comprehensive determination ... 21 
Appendix A (Normative) Determination of the windscreen test area ... 23 
Appendix B (Normative) Individual determination rules for inspection items .. 33 
Bibliography ... 40 
Safety technical specification for glazing materials
used in power-driven vehicles
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
3.11
Glass panes other than windscreen
Glass at any location except the windscreen.
Note: They include but are not limited to sunroofs, side windows, rear windows, partitions
or partition windows in the compartment, window glass in all parts of the upper
compartment of a double-deck passenger car, and upper window glass that does not
provide the driver's field of view at the foremost part of a single-deck passenger car,
etc.
3.12
Head-up display windscreen
H.U.D windscreen
The windscreen which can image the information content in front of the driver
through the optical system.
[QC/T 1119-2019, definition 2.1.9]
3.13
Driver’s vision area
The area on the glass which enables the driver to fully observe the indirect
visual field device required by GB 15084 when necessary, and obtain the
required field of view.
3.14
Head injury criteria
HIC
The characteristic value which characterizes the degree of skull injury, which is
generally evaluated by the method of simulating the vertical impact of a blunt
object on the safety glazing material.
[QC/T 1119-2019, definition 2.5.8]
3.15
R point
The design point specified by the vehicle manufacturer for each seating position.
vehicle.
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%.
5.2.1.2 The visible light transmittance of the glass panes other than windscreen
(except for the driver's vision area) of highway buses, tourist buses, buses and
school buses with a passenger standing area, and passenger cars with a
central engine and an aspect ratio of less than or equal to 0.9 shall not be less
5.5.7 Volatile organic compounds
The volatile organic compound content of the film of safety glazing faced with
plastic material shall not be greater than 0.05 mg/cm2.
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.
6.5.2 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
According to the method specified in GB/T 5137.3, carry out the test. Calculate
the ratio OF the visible light transmittance of the rigid plastic glazing pane after
the test TO the visible light transmittance before the test, expressed as a
percentage, accurate to one decimal place.
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
d) A vertical plane passing through V1 and V2, in the +Y axis direction, and at
20° to the -X axis (the line of intersection between this plane and the outer
surface of the glass is denoted as T4).
A.4.1.2 The expanded area A refers to the test area A and its extension on the
outer surface of the windscreen to the median plane of the vehicle, and the
symmetric part of the extension and test area A to the median plane of the
vehicle.
A.4.1.3 For the windscreen of a single-person center-driving vehicle, the four
planes, which enclose the test area A, refer to a) and b) in A.4.1.1, as well as
the two vertical planes passing through V1 and V2, on the left and right sides of
the -X axis and at 15° with the -X axis direction. See Figure A.2.
A.4.2 Determination of test area B and reduced area B
A.4.2.1 Test area B is the area of the outer surface of the windscreen
surrounded by the following four planes:
a) A plane passing through V1, parallel to the Y axis, above the horizontal
plane, and at 7° to the -X axis (the line of intersection of this plane and the
outer surface of the glass is denoted as T5. The point of intersection of T5
and the vertical plane passing through V1 is denoted as Tr1 point);
b) A plane passing through V2, parallel to the Y axis, below the horizontal
plane, and at 5° to the -X axis (the line of intersection of this plane and the
outer surface of the glass is denoted as T6. The point of intersection of T6
and the vertical plane passing through V2 is denoted as Tr2 point);
c) A vertical plane passing through V1 and V2, in the -Y axis direction, and at
17° with the -X axis (the line of intersection between this plane and the
outer surface of the glass is denoted as T7);
d) A vertical plane symmetrical to c) with respect to the median plane of
vehicle (the line of intersection between this plane and the outer surface
of the glass is denoted as T8).
A.4.2.2 The reference points of area B are the following points. See Figure A.3.
And each point shall not enter the black border or shading zone area:
a) The points of intersection OF the line of intersection of the horizontal plane
through V1 on the outer surface of the glass AND T7 and T8, i.e. Tr3 point
and 𝑇௥ଷᇱ point.
b) Tr1 point and its symmetry point 𝑇௥ଵᇱ to the median plane of vehicle;
A.4.3.1 Test area I is the area of the windscreen surrounded by the following
four planes. See Figure A.6:
a) A plane passing through the straight line OQ (a horizontal straight line
passing through O point and perpendicular to the median plane of vehicle),
above the horizontal plane, and at 10° to the horizontal plane (the line of
intersection between this plane and the outer surface of the glass is
denoted as T1);
b) A vertical plane passing through O point, on the left side of the median
plane of vehicle and at 15° to the plane (the line of intersection between
this plane and the outer surface of the glass is denoted as T2);
c) The symmetry plane of Tc symmetrical to the median plane of vehicle, on
the right side of the longitudinal median plane of vehicle (if there is no
median plane of vehicle, it is symmetrical to the longitudinal vertical plane
of vehicle passing through O point. The line of intersection between this
plane and the outer surface of the glass is denoted as T3);
d) A plane passing through the straight line OQ, below the horizontal plane,
and at 8° to the horizontal plane (the line of intersection between this plane
and the outer surface of the glass is denoted as T4).
A.4.3.2 The 25 mm area inward from the edge of the windscreen or the inner
edge of the black border shall not enter the test area I.
A.4.4 Determination of test area I'
The test area I' is the entire area of the windscreen after removing the 100 mm
inward from the edge or the inner edge of the black border. See Figure A.7.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.