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QC/T 1137-2020: Encapsulated Glazing for Road Vehicles
QC/T 1137-2020
QC
AUTOMOBILE INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 43.040.60
T 34
Encapsulated Glazing for Road Vehicles
ISSUED ON: DECEMBER 09, 2020
IMPLEMENTED ON: APRIL 01, 2021
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword...6
1 Scope...7
2 Normative References... 7
3 Terms and Definitions...8
4 Classification... 10
5 Technical Requirements... 10
6 Test Methods... 16
7 Inspection Rules... 28
8 Packaging, Marking, Transportation and Storage... 30
Encapsulated Glazing for Road Vehicles
1 Scope
This Document specifies the terms and definitions, classification, technical
requirements, test methods, inspection rules, packaging, marking, transportation and
storage of encapsulated glazing for road vehicles.
This Document is applicable to encapsulated glazing for road vehicles produced by
injection molding process.
This Document is not applicable to encapsulated glazing for road vehicles produced
by the tape bonding process.
2 Normative References
The following documents are essential to the application of this Document. For the
dated documents, only the versions with the dates indicated are applicable to this
Document; for the undated documents, only the latest version (including all the
amendments) is applicable to this Document.
GB/T 250 Textiles - Tests for Colour Fastness - Grey Scale for Assessing Change
in Colour
GB 8410 Flammability of Automotive Interior Materials
GB 9656 Safety Glasses for Road Vehicles
GB/T 11942 Colorimetric Methods for Colour Building Materials
GB/T 17340 Road Vehicles - Safety Glasses - Dimensions, Shapes and
Appearances
GB 17930 Gasoline for Motor Vehicles
GB 19147 Automobile Diesel Fuels
GB/T 22523 Feeler Gauge
QC/T 643-2000 Vehicle- Test Method of Contact Stain- Sealing Strips
3.10 Shrink mark
Local depression marks on the surface that are caused by shrinkage.
3.11 Flow mark
Surface marks that are caused by poor flow of encapsulation material.
3.12 Gas mark
When the melt fails to adhere to the cavity due to gas interference during mold filling,
misty or scattered traces are formed on the surface of the product.
3.13 Encapsulation bright patches
Spot-like chromatic aberration defects that are partially shiny on the encapsulation
surface.
3.14 Weld bond
The wiring where two or more strands of molten material meet during the injection
molding process.
3.15 Orange peel grain
Orange peel grain that appears on the encapsulation surface.
3.16 White line
Visible white lines that are formed on the edge of the glass after injection molding.
3.17 Crack
Traces of cracks or ruptures in the encapsulation material
3.18 Parting line
The boundary line between the upper and lower molds of the injection mold or the
boundary line created by the splicing of the molds.
3.19 Datum
The locations or regional points that are predetermined for detection and positioning
on the encapsulated glazing.
5.10 Xenon lamp aging resistance
After the test, the encapsulation material shall have no defects such as cracking,
chalking, bubbles or sticking; and the grey scale shall be no lower than Level-4.
5.11 Chemical resistance
After the test, the encapsulation material shall have no defects such as cracking,
chalking, bubbles or sticking; and the grey scale shall be no lower than Level-4.
5.12 Pollution resistance
After the test, there shall be no traces or light-yellow contamination outlines on the
test panel.
5.13 Flame resistance
The burning speed of the encapsulation material shall not exceed 70 mm/min.
6 Test Methods
6.1 Test conditions
Except for special provisions, the test shall be carried out under the following
conditions:
a) Ambient temperature: 20°C±5°C;
b) Atmospheric pressure: 8.60×104Pa~1.06×105Pa;
c) Relative humidity: 40%~80%.
6.2 Appearance quality
6.2.1 For the cleavage requirements in Table 2, take the product as the specimen, and
compare the difference between the specimen and the colour plate by visual
inspection.
6.2.2 For the colour requirements in Table 2, take the product as the specimen,
compare the difference between the specimen and the colour plate by visual
inspection; when there is a visual difference, test according to the provisions of GB/T
11942.
6.2.3 For the appearance quality requirements other than the cleavage and colour in
Table 2, take the product as the specimen, and place the specimen on the inspection
bench at an ambient illuminance above 1000Lx. The inspector is 600mm~800mm
Figure 3 – Schematic Diagram of Bonding Strength Test of Metal Peg after
Encapsulation
6.6 Low temperature resistance
6.6.1 Specimen
Take the product as the specimen; and the quantity shall be in accordance with the
requirements of 6.5. Place the specimen for at least 72h under the test conditions
specified in 6.1 before the test.
6.6.2 Test device
In the environmental test chamber, the temperature deviation range shall be within
±2°C, and the temperature uniformity shall be no greater than 2°C.
6.6.3 Test procedures
6.6.3.1 Place the specimen in a test chamber at a temperature of -40°C±2°C for 48h;
and then take it out and place it for 2h under the test conditions specified in 6.1.
6.6.3.2 Visually inspect the appearance of the specimen; and record the appearance
state.
6.6.3.3 Carry out the bonding strength test between the encapsulation material and
the glass according to the procedures in 6.5.1.3.
6.6.3.4 For specimens with metal peg, carry out the bonding strength test according to
the procedures in 6.5.2.2.3.
6.7 High temperature resistance
6.7.1 Specimen
Take the product as the specimen; and the quantity shall be in accordance with the
requirements of 6.5. Place the specimen for at least 72h under the test conditions
specified in 6.1 before the test.
6.7.2 Test device
In the environmental test chamber, the temperature deviation range shall be within
±2°C, and the temperature uniformity shall be no greater than 2°C.
6.7.3 Test procedures
6.7.3.1 Place the specimen in a test chamber at a temperature of 85°C±3°C for 168h;
and then take it out and place it under the test conditions specified in 6.1 for 2h.
6.7.3.2 Visually inspect the appearance of the specimen; and record the appearance
state.
6.7.3.3 Carry out the bonding strength test between the encapsulation material and
the glass according to the procedures in 6.5.1.3.
6.7.3.4 For specimens with metal peg, carry out the bonding strength test according to
the procedures in 6.5.2.2.3.
6.8 Humidity resistance
6.8.1 Specimen
Take the product as the specimen; and the quantity shall be in accordance with the
requirements of 6.5. Place the specimen for at least 72h under the test conditions
specified in 6.1 before the test.
6.8.2 Test device
Environmental test chamber. Accuracy requirements: temperature deviation range
shall be within ±2°C, relative humidity deviation range shall be within ±4%;
temperature uniformity shall be no greater than 2°C; relative humidity uniformity shall
be no greater than 4%.
6.8.3 Test procedures
6.8.3.1 Place the specimen in a test chamber at a temperature of 50°C±3°C and a
relative humidity of 95%±4% for 240h; and then take it out and place it for 2h under
the test conditions specified in 6.1.
6.8.3.2 Visually inspect the appearance of the specimen and record the appearance
state.
6.8.3.3 Carry out the bonding strength test between the encapsulation material and
the glass according to the procedures in 6.5.1.3.
6.8.3.4 For specimens with metal peg, the bonding strength test shall be carried out in
accordance with the provisions of 6.5.2.2.3.
6.9 High and low temperature cycle resistance
6.9.1 Specimen
Take the product as the specimen; and the quantity shall be in accordance with the
requirements of 6.5. Place the specimen for at least 72h under the test conditions
specified in 6.1 before the test.
level of the grey scale card, the level is regarded as the grey scale of the
specimen. When the colour difference is equal to the middle of some two levels
in the grey scale card, it can be set as the middle level.
6.11 Chemical resistance
6.11.1 Specimen
Take the product as the specimen; the quantity is 3 pieces. Place the specimen for at
least 72h under the test conditions specified in 6.1 before the test.
6.11.2 Chemicals
The chemicals used in the test shall include:
--- Vehicle window cleaning fluid: Commercially available glass cleaning fluid;
--- Gasoline: gasoline for automobiles that complies with the provisions of GB
17930;
--- Diesel: Diesel for vehicles that complies with the provisions of GB 19147.
6.11.3 Test procedures
6.11.3.1 Clean the specimen to ensure that there are no other residuals on the
encapsulation surface of the specimen.
6.11.3.2 Wrap the encapsulation part of the specimen by gauze fully wetted by the
chemical; keep for 1 min; remove the gauze; dry the surface of the specimen by
cotton cloth; leave the sample to dry naturally for 4h and observe the appearance
change visually. Detect the grey scale according to the procedures in 6.10.3.4 and
record the chemical designations.
6.11.3.3 In each test against each chemical, a new specimen shall be used.
NOTE: If the size of the specimen is large enough to ensure that it does not affect each other,
the test of resistance to multiple chemicals can be carried out on one specimen.
6.12 Pollution resistance
The test shall be carried out in accordance with Method-B of exposure pollution test
method specified in QC/T 643-2000.
6.13 Flame resistance
The test shall be carried out in accordance with the provisions of GB 8410.
unqualified.
7.3 Type inspection
7.3.1 General
Type inspection shall be carried out in one of the following situations:
a) Trial type appraisal of new or old products transferred to other factory for
production;
b) After formal production, if there are major changes in structure, materials and
processes, which may affect product performance;
c) During normal production, an inspection shall be performed periodically or after
a certain amount of output has been accumulated;
d) When the production is resumed after the product has been suspended for a
long time (referring to more than 1 year);
e) When there is a significant difference between the exit-factory inspection result
and the previous type inspection.
7.3.2 Inspection items
All items specified in 5.2~5.13.
7.3.3 Batching
The same as 7.2.2.
7.3.4 Sampling
For the items of appearance quality, size and goodness of fit, 3 pieces shall be
randomly selected from this batch of products. Other items are randomly selected
from the batch of products according to the quantity required by each inspection item
specified in Clause 6.
7.3.5 Judgment
7.3.5.1 Qualification judgment for single item
If each item to be tested of the specimen, such as appearance quality, size, goodness
of fit, bonding performance, low temperature resistance, high temperature resistance,
humidity resistance, high and low temperature cycle resistance, xenon lamp aging
resistance, chemical resistance, pollution resistance, flame resistance, etc. meet the
requirements, then such item is judged to be qualified; otherwise, it is unqualified.