2024年4月11日发(作者：鄞绮晴)
JAPANESE AUTOMOBILE STANDARD
JAS0 M351: 1998
Automotive parts
-
Accelerated weathering testing method
by xenon-arc lamp for exterior parts
i. Scope
This standard specifies test procedures by xe-
non-arc lamp type weathering apparatus (here-
after referred
to
as "apparatus") for evaluating
the weatherability of various automotive materi-
als and parts such as body paint, exterior parts
paint, and plastics used for exterior equipment.
Note:
A
xenon-arc lamp type weathering apparatus
is an apparatus capable of irradiating artifi-
cial light similar
to sunlight in order to inves-
tigate the degree
of
weatherability over a
short period
of
time.
2. Normative References
This standard contains references
to
the follow-
ing standards, which by inclusion, constitute
provisions of this standard. Use the latest edition
of these standards.
JIS
B 7754
Light-exposure and light-and-
water exposure apparatus (Xe-
non-arc lamp type)
JIS D 0205
Test method of weatherability for
automotive parts
JIS
L
0843
Testing method for colour fast-
ness
to
xenon arc lamp light
JIS
2
8722 Methods of colour measurement-
reflecting or transmitting objects
JIS
2
8730
Colour specification-colour dif-
ferences of non-luminous materi-
als
JIS
2 8741
Specular glossiness-methods of
measurement
3. Definitions
Definitions of terms used in this standard follow.
a) Weatherability
Resistance
to
deterioration due mainly
to
ex-
posure
to
sunlight, rain and snow, or atmos-
pheric temperature and humidity in a natural
environment.
b) Black panel temperature (hereinafter
referred to as "B.P.,")
Temperature which represents the surface
temperature of a specimen and indicated by
a black panel temperature meter attached
to
a rack or turn table.
c) Xenon-arc lamp
Quartz jacketed xenon-arc lamps, by xenon-
arc discharge, emit radiation in a range that
extends from below 270nm in the ultraviolet
through the visible spectrum and into the in-
frared.
d) Light emitter
Part comprising a xenon-arc lamp and filter
e) Exposing stage
Final exposing stage where a specimen
evaluation test is performed.
4. Test Method
4.1 Items to be evaluated
Evaluated items include;
colour, gloss, and other.
4.2 Test conditions
Test conditions such as temperature, humidity,
and irradiance which affect the test results shall
be as follows.
a) Temperature
Light periods: 6.P.T 63I3"C or 83I3"C
Dark periods: 6.P.T 38-t2@C
b) Humidity
Light periods:
(50-t5)
%
RH
Dark periods:
(95I5)
%
RH
1
JAS0
M351: 1998
c) Irradiance ratio
The distribution
of
relative irradiance is
shown in Table i.
d) Irradiance
60 to 180
W/m2 (at wave length of between
300
and 400nm)
Note: Irradiance has an effect on the accelera-
tion, specimen temperature and heat
e) Irradiation method
Continuous irradiation or light-dark cycle
shall be used. The test conditions for each
mode are as follows.
Other water spray ratios used shall be de-
termined by the parties concerned.
f) Test period control
The period of any test shall be controlled by
history. Therefore, irradiance selec-
amount of irradiation light exposure.
tion must take into account the type of
specimens, and the degree of affection
by temperature.
Table I Distribution
I
of
relative spectral Irradiance for xenon-arc light sources
Wavelength
I
I
Relative spectral irradiance(’)
290-800
I
1
O0
C290
O
290
-
320 0.6
I
0
.2
320 -360 4.2I0.5
360-400 6.2+
1.0
Note(’): The spectral irradiance between
290
to
800
nm
is defined as
I00
%.
Irradiation
Light Light
I
Time (min)
I
102
I
18
Water spray on front surface
-
Spraying
Humidity (%RH)
50I5 95i5
Irradiation
Light Light Light Dark
Time (min)
40 20 60 60
Water spray
on
front surface
-
Spraying
- -
I
I
Water spray on rear surface
I
Humidity (%RH)
I
-
I
I
- I- I
50I5 95i5
I
50=5
I
Spraying
95I5
2
2024年4月11日发(作者：鄞绮晴)
JAPANESE AUTOMOBILE STANDARD
JAS0 M351: 1998
Automotive parts
-
Accelerated weathering testing method
by xenon-arc lamp for exterior parts
i. Scope
This standard specifies test procedures by xe-
non-arc lamp type weathering apparatus (here-
after referred
to
as "apparatus") for evaluating
the weatherability of various automotive materi-
als and parts such as body paint, exterior parts
paint, and plastics used for exterior equipment.
Note:
A
xenon-arc lamp type weathering apparatus
is an apparatus capable of irradiating artifi-
cial light similar
to sunlight in order to inves-
tigate the degree
of
weatherability over a
short period
of
time.
2. Normative References
This standard contains references
to
the follow-
ing standards, which by inclusion, constitute
provisions of this standard. Use the latest edition
of these standards.
JIS
B 7754
Light-exposure and light-and-
water exposure apparatus (Xe-
non-arc lamp type)
JIS D 0205
Test method of weatherability for
automotive parts
JIS
L
0843
Testing method for colour fast-
ness
to
xenon arc lamp light
JIS
2
8722 Methods of colour measurement-
reflecting or transmitting objects
JIS
2
8730
Colour specification-colour dif-
ferences of non-luminous materi-
als
JIS
2 8741
Specular glossiness-methods of
measurement
3. Definitions
Definitions of terms used in this standard follow.
a) Weatherability
Resistance
to
deterioration due mainly
to
ex-
posure
to
sunlight, rain and snow, or atmos-
pheric temperature and humidity in a natural
environment.
b) Black panel temperature (hereinafter
referred to as "B.P.,")
Temperature which represents the surface
temperature of a specimen and indicated by
a black panel temperature meter attached
to
a rack or turn table.
c) Xenon-arc lamp
Quartz jacketed xenon-arc lamps, by xenon-
arc discharge, emit radiation in a range that
extends from below 270nm in the ultraviolet
through the visible spectrum and into the in-
frared.
d) Light emitter
Part comprising a xenon-arc lamp and filter
e) Exposing stage
Final exposing stage where a specimen
evaluation test is performed.
4. Test Method
4.1 Items to be evaluated
Evaluated items include;
colour, gloss, and other.
4.2 Test conditions
Test conditions such as temperature, humidity,
and irradiance which affect the test results shall
be as follows.
a) Temperature
Light periods: 6.P.T 63I3"C or 83I3"C
Dark periods: 6.P.T 38-t2@C
b) Humidity
Light periods:
(50-t5)
%
RH
Dark periods:
(95I5)
%
RH
1
JAS0
M351: 1998
c) Irradiance ratio
The distribution
of
relative irradiance is
shown in Table i.
d) Irradiance
60 to 180
W/m2 (at wave length of between
300
and 400nm)
Note: Irradiance has an effect on the accelera-
tion, specimen temperature and heat
e) Irradiation method
Continuous irradiation or light-dark cycle
shall be used. The test conditions for each
mode are as follows.
Other water spray ratios used shall be de-
termined by the parties concerned.
f) Test period control
The period of any test shall be controlled by
history. Therefore, irradiance selec-
amount of irradiation light exposure.
tion must take into account the type of
specimens, and the degree of affection
by temperature.
Table I Distribution
I
of
relative spectral Irradiance for xenon-arc light sources
Wavelength
I
I
Relative spectral irradiance(’)
290-800
I
1
O0
C290
O
290
-
320 0.6
I
0
.2
320 -360 4.2I0.5
360-400 6.2+
1.0
Note(’): The spectral irradiance between
290
to
800
nm
is defined as
I00
%.
Irradiation
Light Light
I
Time (min)
I
102
I
18
Water spray on front surface
-
Spraying
Humidity (%RH)
50I5 95i5
Irradiation
Light Light Light Dark
Time (min)
40 20 60 60
Water spray
on
front surface
-
Spraying
- -
I
I
Water spray on rear surface
I
Humidity (%RH)
I
-
I
I
- I- I
50I5 95i5
I
50=5
I
Spraying
95I5
2