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QC/T 985-2024: Automotive solar reflective coated laminated windscreen
QC/T 985-2024
QC
AUTOMOTIVE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
CCS T 26
Replacing QC/T 985-2014
Automotive solar reflective coated laminated windscreen
ISSUED ON: JULY 19, 2024
IMPLEMENTED ON: JANUARY 01, 2025
Issued by: Ministry of Industry and Information Technology of the People's
Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 6
4 Product classification ... 7
5 Technical requirements ... 7
6 Test methods ... 10
7 Inspection rules ... 16
8 Packaging, marking, transportation and storage ... 20
Automotive solar reflective coated laminated windscreen
1 Scope
This document specifies the terms and definitions, product classification, technical
requirements, test methods, inspection rules, packaging, marking, transportation and
storage for automotive solar reflective coated laminated windscreen.
This document is applicable to automotive solar reflective coated laminated windscreen,
and as a reference to automotive solar reflective coated laminated non-windscreen.
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements of this document. For dated references, only the
version corresponding to that date is applicable to this document; for undated references,
the latest version (including all amendments) is applicable to this document.
GB/T 5137.2, Test methods of safety glazing materials used on road vehicles - Part
2: Optical properties tests
GB/T 5137.4, Test methods of safety glazing materials used on road vehicles - Part
4: Determination of solar characteristic
GB 9656, Safety technical specification for glazing materials used in power-driven
vehicles
GB/T 10125-2021, Corrosion tests in artificial atmospheres - Salt spray tests
GB 11555, Motor vehicles - Windshield demisting and defrosting systems -
Performance requirements and test methods
GB/T 11942, Test method of chroma for colour building materials
GB/T 44153, General technical requirements for glazing materials used in power-
driven vehicles
GB/T 43299, Test methods of electrical heating properties for glazing materials
used in power-driven vehicles
JC/T 512, Packaging of automobile safety glass
QC/T 1119, Road vehicles - Safety glazing materials - Vocabulary
boundary ghosting
The state where the boundary of the film layer of the coated glass appears to be too
wide, with an uneven transition or yellowing and diffusion.
3.8
electro-magnetic field aperture
The coating-removed or uncoated area on the solar reflective coated laminated
windscreen to realize the vehicle-mounted wireless signal transmission function.
4 Product classification
Automobile solar reflective coated laminated windscreens are divided into heating type
and non-heating type according to whether they have heating function; and are divided
into Class I, Class II and Class III according to the total solar energy transmittance.
5 Technical requirements
5.1 Thickness deviation, size deviation, fit, overlap, edge quality, marking quality,
edge stress, pedestrian impact safety
Shall meet the requirements of GB/T 44153 or relevant technical conditions.
5.2 Vision safety performance, strength safety performance and environmental
durability safety performance
The vision safety performance (visible light transmittance, secondary image deviation,
light distortion), strength safety performance (human head model impact performance,
penetration resistance, impact resistance), and environmental durability safety
performance (wear resistance, heat resistance, radiation resistance, moisture resistance)
shall comply with the requirements for laminated safety glass for windscreens in GB
9656.
5.3 Appearance quality
5.3.1 The automotive solar reflective coated laminated windscreen shall comply with
the appearance quality requirements of GB/T 44153.
5.3.2 Coated glass shall also meet the requirements of Table 1.
5.9 Electrical attachment pull-out force
For an electrical plug with one end placed inside the laminated glass and in contact with
the coated surface, the pull-out force shall not be less than 50 N.
5.10 Overpressure
The circuit shall be turned on after the test, and the power change rate before and after
the test shall not be greater than 5%.
5.11 Resistance to low temperature electrical and thermal shock
After the test, the test sample shall not break, and the part beyond 15 mm of the edge
of the test sample shall not have visible defects such as discoloration, bubbles, cracks,
etc. After the test, the circuit shall be turned on, and the power change rate before and
after the test shall not be greater than 5%.
5.12 Moisture resistance
After the test, the test sample shall not break, and the part beyond 15 mm of the edge
of the test sample shall not have visible defects such as discoloration, bubbles, cracks,
etc. After the test, the circuit shall be turned on, and the power change rate before and
after the test shall not be greater than 5%.
5.13 Salt spray resistance
After the test, the test sample shall not have visible defects such as discoloration,
bubbles, cracks, etc.
5.14 Resistance to cold, hot and wet cycles
After the test, the part beyond 15 mm of the edge of the test sample shall not have any
visible discoloration, bubbling, turbidity, etc.
5.15 Thermal shock resistance
After the test, the part beyond 15 mm of the edge of the test sample shall not have any
visible discoloration, bubbling, turbidity, etc.
5.16 Thermal aging resistance
After the test, the part beyond 15 mm of the edge of the test sample shall not have any
visible discoloration, bubbling, turbidity, etc.
5.17 Low temperature resistance
After the test, the part beyond 15 mm of the edge of the test sample shall not have any
visible discoloration, bubbling, turbidity, etc.
6 Test methods
6.1 Test conditions
Unless otherwise specified, the test shall be carried out under the following conditions:
a) Temperature: 20 °C ± 5 ℃;
b) Relative humidity: 40% ~ 80%.
6.2 Thickness deviation, size deviation, fit, overlap, edge quality, marking quality,
edge stress, pedestrian impact safety
Inspection shall be carried out according to GB/T 44153 or the method agreed upon by
the supplier and the buyer.
6.3 Vision safety performance, strength safety performance and environmental
durability safety performance
Visible light transmittance, secondary image deviation, light distortion, human head
model impact performance, penetration resistance, impact resistance, wear resistance,
heat resistance, radiation resistance and moisture resistance are tested according to the
methods specified in GB 9656.
6.4 Appearance quality
6.4.1 The appearance quality of windscreen laminated glass shall be inspected using the
finished product as the test sample in accordance with the method specified in GB/T
44153.
6.4.2 Taking the finished product as the test sample, place it on the inspection rack under
an ambient illumination of 1 000 lx or above or outdoor natural light, as shown in Figure
1. Face the outer surface of the test sample to the inspector. The inspector is 300 mm
away from the test sample and uses a reading microscope with a graduation value of
0.1 mm to measure the boundary ghosting size; the inspector is 600 mm away from the
test sample and observes the sample surface perpendicularly to see if there are stripes,
stains, or water stains.
6.12 Resistance to low temperature electrical and thermal shock
Take three products as the test samples, and conduct the test according to the method
specified in GB/T 43299. After the test, calculate the power change rate according to
Formula (1) in 6.11.
6.13 Moisture resistance
Take three products as the test samples, and conduct the test according to the method
specified in GB/T 43299. After the test, calculate the power change rate according to
Formula (1).
6.14 Salt spray resistance
6.14.1 Sample preparation
Take the product or a 300 mm × 300 mm flat test piece made with the same structure,
same process and same material as the product as the test sample. The distance between
the film layer boundary and the glass edge is the same as that of the product. The
number of pieces is 3.
6.14.2 Test procedure
Conduct the neutral salt spraying (NSS) according to the method specified in GB/T
10125-2021, with a test period of 720 hours. After the test, treat the sample according
to the provisions of 12.2, then observe the changes in the appearance of the sample and
record the distance between the film layer boundary and the glass edge.
6.15 Resistance to cold, hot and wet cycles
6.15.1 Sample preparation
Same as 6.14.1.
6.15.2 Test device
For programmable environmental test chamber, the temperature deviation range shall
be within ±2°C, and the temperature uniformity shall be no greater than 2 °C; the
relative humidity deviation range shall be within ±4%, and the relative humidity
uniformity shall be no greater than 4%.
6.15.3 Test procedure
6.15.3.1 Carry out the test for a total of 4 cycles. Each cycle includes the following 7
stages: heating rate [1 ℃ ~ 3 ℃]/min, cooling rate [0.7 ℃ ~ 1 ℃]/min.
a) Heating stage: the temperature rises from 23 ℃ ± 2 ℃ to 90 ℃ ± 2 ℃.
b) Insulation stage: maintain the temperature at 90 ℃ ± 2 ℃ for 4 h.
c) Cooling stage: the temperature drops to 50 ℃ ± 2 ℃, and the relative humidity
is 95% ~ 100%.
d) Insulation stage: maintain the temperature at 50 ℃ ± 2 ℃, and the relative
humidity at 95% ~ 100% for 4 h.
e) Cooling stage: when the temperature drops to -40 ℃ ± 2 ℃ and the relative
humidity drops to 30% ~ 40%, no control will be carried out.
f) Insulation stage: maintain the temperature at -40 ℃ ± 2 ℃ for 16 h.
g) Heating stage: the temperature rises to 23 ℃ ± 2 ℃.
6.15.3.2 In the last cycle, maintain the temperature at -40℃±2℃ for 16 hours before
ending the test. Do not increase the temperature any further.
6.15.3.3 After the test, take out the sample and place it at room temperature for 4 hours
to observe the changes in the sample’s appearance.
6.16 Thermal shock resistance
6.16.1 Sample preparation
Same as 6.14.1.
6.16.2 Test device
For high and low temperature shock environment test chamber, the temperature
deviation range shall be within ±2 ℃, and the temperature uniformity shall not be
greater than 2 ℃.
6.16.3 Test procedure
6.16.3.1 Conduct the test for 4 cycles in total. A single cycle includes two processes, a)
and b). The switching time between a) and b) shall be ≤ 30 s:
a) Maintain the temperature at -40 ℃ ± 2 ℃ for 2 h;
b) Maintain the temperature at 80 ℃ ± 2 ℃ for 2 h.
6.16.3.2 After the test, take out the sample and place it at room temperature for 4 hours
to observe the changes in the sample's appearance.
6.17 Thermal aging resistance
6.17.1 Sample preparation
Same as 6.14.1.
Those that comply with the requirements of this document are qualified, and those that
do not comply are unqualified.
7.2.4 Comprehensive determination
If all the inspection items listed in Table 3 are qualified, the batch of products is judged
to have passed the ex-factory inspection, otherwise it is unqualified.
7.3 Type inspection
7.3.1 General
Type inspection shall be carried out in the following cases, including but not limited to:
a) When a new product is put into production, a product is finalized and identified,
or when production is transferred to another factory;
b) After formal production, if there are major changes in structure, materials and
processes, which may affect product performance;
c) During normal production, inspection shall be carried out periodically or after a
certain amount of production has been accumulated;
d) When the product is discontinued for more than half a year and the production
is resumed;
e) When the quality supervision department proposes a type inspection
requirement;
f) When the factory inspection results are significantly different from the last type
inspection.
7.3.2 Batching
Products of the same process, the same material and the same structure are considered
as one batch. When the product batch is greater than 1 200 pieces, samples are taken in
batches of 1 200 pieces. If the batch is less than 1 200 pieces, it is considered as one
batch.
7.3.3 Sampling
Same as 7.2.2.
7.3.4 Determination rules
7.3.4.1 Single item determination
7.3.4.1.1 Thickness deviation, size deviation, fit, overlap, edge quality, marking
quality, appearance quality