GB 9656-2021Safety technical specification for glazing materials used in power-driven vehicles (English PDF)

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]

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.

5.3 Strength safety requirements

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.

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.

6.5 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 mmx100 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.

6.5.5 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.

7.1 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.