JC/T 672-1997 English PDF (JC/T672-1997)

JC/T 672-1997: Electric heating glass of rear auto window
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JC/T 672-1997
JC
BUILDING MATERIAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Electric heating glass of rear auto window
ISSUED ON: AUGUST 05, 1997
IMPLEMENTED ON: JANUARY 01, 1998
Issued by: State Bureau of Building Materials Industry
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Requirements ... 4
4 Test method ... 7
5 Inspection rules ... 8
6 Marking, packaging, transportation, storage ... 9
Electric heating glass of rear auto window
1 Scope
This standard specifies the thickness, performance indicators, test methods, inspection
rules and marking, packaging, transportation, storage and other requirements of electric
heating glass of auto rear windows. It is applicable to all types of electric heating glass
of auto rear windows.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. The versions indicated at the time of publication of this
standard are valid. All standards are subjected to revision, AND parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable.
GB 1216-85 Micrometers
GB 5137.1-1996 Road vehicles - Safety glazing materials - Test methods for
mechanical properties
GB 5137.2-1996 Road vehicles - Safety glazing materials - Test methods for optical
properties
GB 9656-1996 Safety glasses for road vehicles
JC/T 512-93 Packaging of automobile safety glass
JC/T 673-1997 Performance test method for electric heating glass of rear auto
window
3 Requirements
3.1 Thickness
The thickness of the product shall comply with the provisions of 5.1 of GB 9656.
3.2 Transmittance
The transmittance of electric heating glass shall comply with the provisions of 5.2.2 of
GB 9656.
3.3 Impact resistance
The impact resistance of electric heating glass shall comply with the provisions of
5.12.2 (b) in GB 9656.
3.4 Fragmentation state
The fragmentation state of electric heating glass shall comply with the provisions of
5.13.2 in GB 9656.
3.5 Electric heating performance
3.5.1 Opacity
The opacity of electric heating glass shall not exceed 3%, or meet the requirements of
the corresponding product technical conditions.
Take three products for testing. If all three products meet the above requirements, they
are qualified; otherwise, they are unqualified.
3.5.2 Welding strength of electric plug
The electric plug shall not fall off the product after a tensile force of 80 N or more in a
direction perpendicular to the glass surface is applied for 2 s.
Take three products for testing. If all three products meet the above requirements, they
are qualified; otherwise, they are unqualified.
3.5.3 Bending resistance of electric plug
The electric plug on the product shall not be damaged after 3 tests.
Take three electric plugs for testing. If all three electric plugs meet the above
requirements, they are qualified. Otherwise, they are unqualified.
3.5.4 Resistance to cleaning agents
After cleaning the electric heating glass with a cleaning agent, it shall not cause
functional disorders of the electric heating glass, such as: electric heating wire falling
off, electric heating element failure, etc.
Take three products for testing. If all three products meet the above requirements, they
are qualified; otherwise, they are unqualified.
3.5.5 Power
The power of the electric heating glass shall be 4.0 ~ 4.5 W/dm2 (voltage is DC 12 V)
or meet the requirements of the corresponding product technical conditions.
Test according to Chapter 13 of JC/T 673.
4.5.8 Electrical and thermal shock resistance
Test according to Chapter 15 of JC/T 673.
4.5.9 Hot spot temperature
Test according to Chapter 14 of JC/T 673.
4.5.10 Durability
Test according to Chapter 19 of JC/T 673.
5 Inspection rules
5.1 Inspection classification
5.1.1 Exit-factory inspection
Inspection items include thickness, power, hot spot temperature, electrical plug welding
strength.
5.1.2 Type inspection
Inspection items include all technical requirements of the product specified in this
standard.
Type inspection shall be carried out in any of the following situations:
a) Trial design identification of new products or old products after trans-plant
production;
b) After formal production, if there are major changes in structure, materials,
processes that may affect product performance;
c) When normal production has been in place for one year;
d) When the production is resumed after suspension of one year;
e) When the exit-factory inspection results are significantly different from the last
type inspection;
f) When the national quality supervision agency proposes a type inspection
requirement.
5.2 Group-batching and sampling rules
JC/T 672-1997
JC
BUILDING MATERIAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
Electric heating glass of rear auto window
ISSUED ON: AUGUST 05, 1997
IMPLEMENTED ON: JANUARY 01, 1998
Issued by: State Bureau of Building Materials Industry
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative references ... 4
3 Requirements ... 4
4 Test method ... 7
5 Inspection rules ... 8
6 Marking, packaging, transportation, storage ... 9
Electric heating glass of rear auto window
1 Scope
This standard specifies the thickness, performance indicators, test methods, inspection
rules and marking, packaging, transportation, storage and other requirements of electric
heating glass of auto rear windows. It is applicable to all types of electric heating glass
of auto rear windows.
2 Normative references
The provisions in following documents become the provisions of this Standard through
reference in this Standard. The versions indicated at the time of publication of this
standard are valid. All standards are subjected to revision, AND parties who reach an
agreement based on this Standard are encouraged to study if the latest versions of these
documents are applicable.
GB 1216-85 Micrometers
GB 5137.1-1996 Road vehicles - Safety glazing materials - Test methods for
mechanical properties
GB 5137.2-1996 Road vehicles - Safety glazing materials - Test methods for optical
properties
GB 9656-1996 Safety glasses for road vehicles
JC/T 512-93 Packaging of automobile safety glass
JC/T 673-1997 Performance test method for electric heating glass of rear auto
window
3 Requirements
3.1 Thickness
The thickness of the product shall comply with the provisions of 5.1 of GB 9656.
3.2 Transmittance
The transmittance of electric heating glass shall comply with the provisions of 5.2.2 of
GB 9656.
3.3 Impact resistance
The impact resistance of electric heating glass shall comply with the provisions of
5.12.2 (b) in GB 9656.
3.4 Fragmentation state
The fragmentation state of electric heating glass shall comply with the provisions of
5.13.2 in GB 9656.
3.5 Electric heating performance
3.5.1 Opacity
The opacity of electric heating glass shall not exceed 3%, or meet the requirements of
the corresponding product technical conditions.
Take three products for testing. If all three products meet the above requirements, they
are qualified; otherwise, they are unqualified.
3.5.2 Welding strength of electric plug
The electric plug shall not fall off the product after a tensile force of 80 N or more in a
direction perpendicular to the glass surface is applied for 2 s.
Take three products for testing. If all three products meet the above requirements, they
are qualified; otherwise, they are unqualified.
3.5.3 Bending resistance of electric plug
The electric plug on the product shall not be damaged after 3 tests.
Take three electric plugs for testing. If all three electric plugs meet the above
requirements, they are qualified. Otherwise, they are unqualified.
3.5.4 Resistance to cleaning agents
After cleaning the electric heating glass with a cleaning agent, it shall not cause
functional disorders of the electric heating glass, such as: electric heating wire falling
off, electric heating element failure, etc.
Take three products for testing. If all three products meet the above requirements, they
are qualified; otherwise, they are unqualified.
3.5.5 Power
The power of the electric heating glass shall be 4.0 ~ 4.5 W/dm2 (voltage is DC 12 V)
or meet the requirements of the corresponding product technical conditions.
Test according to Chapter 13 of JC/T 673.
4.5.8 Electrical and thermal shock resistance
Test according to Chapter 15 of JC/T 673.
4.5.9 Hot spot temperature
Test according to Chapter 14 of JC/T 673.
4.5.10 Durability
Test according to Chapter 19 of JC/T 673.
5 Inspection rules
5.1 Inspection classification
5.1.1 Exit-factory inspection
Inspection items include thickness, power, hot spot temperature, electrical plug welding
strength.
5.1.2 Type inspection
Inspection items include all technical requirements of the product specified in this
standard.
Type inspection shall be carried out in any of the following situations:
a) Trial design identification of new products or old products after trans-plant
production;
b) After formal production, if there are major changes in structure, materials,
processes that may affect product performance;
c) When normal production has been in place for one year;
d) When the production is resumed after suspension of one year;
e) When the exit-factory inspection results are significantly different from the last
type inspection;
f) When the national quality supervision agency proposes a type inspection
requirement.
5.2 Group-batching and sampling rules