JC/T 2170-2013 English PDF (JC/T2170-2013)

JC/T 2170-2013: Anti-reflective coated glass for photovoltaic modules
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JC/T 2170-2013
JC
CONSTRUCTION INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 81.040.30
Q 34
Record No.: 40924-2013
Anti-reflective Coated Glass for Photovoltaic Modules
ISSUED ON: APRIL 25, 2013
IMPLEMENTED ON: SEPTEMBER 9, 2013
Issued by: Ministry of Housing and Urban-Rural Development of the People’s
Republic of China
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Terms and Definitions ... 4
4 Materials ... 5
5 Requirements ... 5
6 Test Methods ... 12
7 Inspection Rules ... 25
8 Marking, Packaging, Transportation and Storage ... 27
Annex A (Informative) Spectral Transmittance - Another Method ... 29
Annex B (Normative) Test Methods relevant to IEC 61215-2005 ... 30
Anti-reflective Coated Glass for Photovoltaic Modules
1 Scope
This standard specifies the terms and definitions, materials, requirements, test methods, inspection
rules, marking, packaging, transportation and storage of anti-reflective coated glass for
photovoltaic modules (hereinafter referred to as anti-reflective coated glass).
This standard is applicable to single-side anti-reflective coated glass used for crystalline silicon
photovoltaic modules, and may serve for reference for other anti-reflective coated glass for
photovoltaic modules.
2 Normative References
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of the
referenced document (including any amendments) applies.
GB/T 1771-2007 Paints and Varnishes - Determination of Resistance to Neutral Salt
Spray
GB/T 2828.1 Sampling Procedures for Inspection by Attribute - Part 1: Sampling
Schemes Indexed by Acceptance Quality Limit (AQL) for Lot-by-lot
Inspection
GB/T 6739-2006 Paints and Varnishes - Determination of Film Hardness by Pencil Test
GB/T 8170 Rules of Rounding Off for Numerical Values and Expression and
Judgment of Limiting Values
GB/T 9056 Metal Ruler
GB/T 9266-2009 Determination of Scrub Resistance of Film of Architectural Paints and
Coatings
GB 15763.2-2005 Safety Glazing Materials in Building - Part 2: Tempered Glass
GB 15763.3-2009 Safety Glazing Materials in Building - Part 3: Laminated Glass
GB/T 22523 Feeler Gauge
GJB 150.12A-2009 Laboratory Environmental Test Methods for Military Material - Part
12: Sand and Dust Test
JB/T 2369 Reading Microscope
IEC 60068-2-78 Environmental Testing - Part 2-78: Tests - Test Cab: Damp Heat,
Steady State
IEC 61215-2005 Crystalline Silicon Terrestrial Photovoltaic (PV) Modules - Design
Qualification and Type Approval
3 Terms and Definitions
5.12 Humidity and freezing resistance
Mean decrease of the effective solar transmittance after test shall not be greater than 1% and the
film shall be free from obvious shedding, peeling and wrinkling.
5.13 Heat and humidity resistance
Mean decrease of the effective solar transmittance after test shall not be greater than 1% and the
film shall be free from obvious shedding, peeling and wrinkling.
5.14 Ultraviolet resistance
Mean decrease of the effective solar transmittance after test shall not be greater than 1% and the
film shall be free from obvious shedding, peeling and wrinkling.
5.15 Sand and dust resistance
Mean decrease of the effective solar transmittance after test shall not be greater than 1% and the
film shall be free from obvious shedding, peeling and wrinkling.
5.16 Impact resistance
The specimen shall not be damaged after test.
5.17 Fragment state
The minimum quantity of fragments of each specimen within any area (50mm×50mm) shall not
be less than 40, and a small amount of fragment strips with the length not exceeding 100mm are
allowed to exist.
5.18 Shot-bag impact performance
The specimen must meet the requirements either a) or b);
a) Where the glass is broken, the total mass of the 10 largest fragments of each specimen shall
not exceed the mass of specimen with 65cm2 in area, and the length of any glass fragment without
through crack reserved in frame shall not exceed 120mm;
b) Where the drop height of shot-bag is 1200mm, the specimen shall not be damaged.
5.19 Heat impact resistance
Anti-reflective coated glass shall be resistant to a temperature difference of 200℃ without
damage.
6 Test Methods
6.1 Dimension and its permissible deviation
6.1.1 Dimension inspection
Dimensions shall be measured with a steel ruler or steel tape with the minimum scale of 1mm.
6.1.2 Permissible deviation of diagonal line
The length of two diagonal lines of glass shall be measured with steel tape and the deviation of
diagonal line shall be calculated according to Formula (1).
Where,
Δl — the deviation of diagonal line, mm;
l1 and l2 — the length of two diagonal lines, mm.
6.1.3 Permissible deviation of thickness and thickness difference
The external micrometer or instrument with precision of 0.01mm shall be adopted for the
measurement at the midpoints of the four sides 15mm away from the glass sheet sides. The
arithmetic mean value of measuring results is the thickness which is rounded off to two digits after
the decimal point (in mm). The difference between thickness and nominal thickness is calculated.
The thickness difference between the same glass is the difference between the maximum value
and the minimum value of the four measurement values.
6.2 Appearance quality
Product is taken as specimen, place the specimen vertically at the position 600mm away from the
screen in an environment not affected by external light. The screen is black and opaque, and it is
equipped with several 40W fluorescent lamps which are arranged with a spacing of 300mm. The
observer shall be 600mm away from the specimen, with included angle between sight and
specimen of 0°~60°, observe it back and forth as shown in Figure 1.
Metal ruler with division value of 1mm complying with GB/T 9056 and reading microscope with
division value of 0.01mm complying with JB/T 2369 are adopted for measuring length and width.
6.6.4 Test procedures
6.6.4.1 Push the sharp point of the pencil on the coating surface by at least 7mm according to the
procedures of 9.1~9.5 in GB/T 6739-2006.
6.6.4.2 After 30s, wipe it up with nonwoven fabric dipped with absolute ethanol; after drying,
inspect the specimen surface under 200× microscope, observe whether there is visible scratch on
the specimen surface.
6.6.4.3 If there is no scratch, repeat the test in the area which is not tested, replace the pencil
with relatively high hardness until a scratch with length at least 3mm appears.
If a scratch with length exceeding 3mm appears, decrease the pencil's hardness, repeat the test
until the scratch with length exceeding 3mm no longer appears.
6.6.4.4 Conduct parallel determination twice. If the two determination results are inconsistent,
repeat the test.
6.6.5 Result expression
If a scratch with length exceeding 3mm does not appear on anti-reflective coated glass, the
hardness of the hardest pencil is taken as the pencil hardness of the specimen.
6.7 Scrub resistance test
6.7.1 Test purpose
Determine attenuation of the effective solar transmittance τ and appearance change condition after
the specimen is subject to certain strength of scrub test.
6.7.2 Specimen
Anti-reflective coated glass with dimension of 300mm×300mm or 430mm×150mm made of the
same raw material and under the same process condition as the product is taken as the specimen, 3
pieces in total.
6.7.3 Apparatus and materials
Apparatus and materials shall meet the requirements of GB/T 9266-2009.
6.7.4 Test procedures
6.7.4.1 Put the side with membrane of the specimen upward to be in direct contact with the
brush, conduct scrub resistance test according to the method in GB/T 9266-2009, 400 times of
reciprocating brushing in total.
6.7.4.2 After the test is completed, take out the sample, clean it with deionized water first and
then absolute ethyl alcohol, place in a drying oven at (110±10)℃ for half an hour and cool to
room temperature for measurement.
6.7.5 Result expression
Before and after the end of the test, respectively determine the effective transmittance τ of the
uniformly distributed 5 points in the test area, then calculate the mean value. Finally calculate the
difference between the mean values of the effective solar transmittance τ of each specimen before
and after brushing resistance test.
6.8 Acid resistance test
6.8.1 Test purpose
Determine attenuation of the effective solar transmittance τ and appearance change condition after
anti-reflective coated glass is subject to certain strength of acid environment.
6.8.2 Specimen
Product is taken as the specimen, or anti-reflective coated glass with dimension of 300 mm×
300mm made of the same raw material and under the same process condition as the product is
taken as the specimen, 3 pieces in total.
6.8.3 Materials and reagents
Hydrochloric acid solution with concentration of 1mol/L.
6.8.4 Test procedure
6.8.4.1 Immerse all the specimen in 1mol/L hydrochloric acid at (23±2)℃ for 24h.
6.8.4.2 After the test is completed, take out the specimen, clean it with deionized water first and
then absolute ethyl alcohol, place in a drying oven at (110±10)℃ for half an hour and cool to
room temperature for measurement.
6.8.5 Result expression
Before and after the test is completed, respectively measure the effective solar transmittance τ in 5
areas in Figure 2 according to the requirements of 6.5, then calculate the mean value. Finally,
calculate the difference between the mean values of the effective solar transmittance τ of each
specimen before and after the test.
Product is taken as the specimen, or anti-reflective coated glass with dimension of
300mm×300mm made of the same raw material and under the same process condition as the
product is taken as the specimen, 3 pieces in total.
6.10.3 Apparatus
Apparatus shall meet the requirements specified in Annex B.2.1.
6.10.4 Test procedures
6.10.4.1 Carry out heat cycle test according to the procedures in B.2.2 of Annex B, with 200
cycles.
6.10.4.2 After the test is completed, take out the specimen, clean it with deionized water first
and then absolute ethyl alcohol, place in a drying oven at (110±10)℃ for half an hour and cool to
room temperature for measurement.
6.10.5 Result expression
Before and after the test is completed, respectively measure the effective solar transmittance τ in 5
areas in Figure 2 according to the requirements of 6.5 and calculate the mean value. Finally,
calculate the difference between the values of the effective solar transmittance τ of each specimen
before and after the test.
6.11 Humidity and freezing resistance test
6.11.1 Test purpose
To determine the attenuation of the effective solar transmittance τ as well as appearance changes
of anti-reflective coated glass, after it suffers from high temperature and high humidity as well as
subsequent subzero temperature.
6.11.2 Specimen
Product is taken as the specimen, or anti-reflective coated glass with dimension of
300mm×300mm made of the same raw material and under the same process condition as the
product is taken as the specimen, 3 pieces in total.
6.11.3 Apparatus
Apparatus shall meet the requirements specified in B.3.1 of Annex B.
6.11.4 Test procedures
6.11.4.1 Carry out humidity-freezing test according to the procedures in B.3.2 of Annex B, with
10 cycles.
6.11.4.2 After the test is completed, take out the specimen, clean it with deionized water first and
then absolute ethyl alcohol, place in a drying oven at (110±10)℃ for half an hour and cool to
room temperature for measurement.
6.11.5 Result expression
Before and after the test is completed, respectively measure the effective solar transmittance τ in 5
areas in Figure 2 according to the requirements of 6.5 and calculate the mean value. Finally,
calculate the difference between the values of the effective solar transmittance τ of each specimen
before and after the test.
6.12 Humidity and heat resistance test
6.12.1 Test purpose
To determine the attenuation of the effective solar transmittance τ as well as appearance changes
of anti-reflective coated glass, after it suffers from long-term moisture vapor transmission.
6.12.2 Specimen
Product is taken as the specimen, or anti-reflective coated glass with dimension of
300mm×300mm made of the same raw material and under the same process condition as the
product is taken as the specimen, 3 pieces in total.
6.12.3 Test procedures
6.12.3.1 Carry out the test according to IEC 60068-2-78. Put the specimen under room
temperature without any pretreatment into climatic chamber.
6.12.3.2 Carry out the test under the following severe conditions:
—Test temperature: (85±2)℃;
—Relative humidity: (85±5)%;
—Test duration: 1000h.
6.12.3.3 After the test is completed, take out the specimen, clean it with deionized water first
and then absolute ethyl alcohol, place in a drying oven at (110±10)℃ for half an hour and cool to
room temperature for measurement.
To determine the attenuation of the effective solar transmittance τ after it suffers from certain
intensity of dust blowing, sand blowing and dust falling.
6.14.2 Apparatus and materials
Sand and dust test chamber as well as sand and dust in accordance with GJB 150.12A-2009.
6.14.3 Specimen
Product is taken as the specimen, or anti-reflective coated glass with dimension of
300mm×300mm made of the same raw material and under the same process condition as the
product is taken as the specimen, 3 pieces in total.
6.14.4 Test procedures
6.14.4.1 Carry out dust blowing, sand blowing and dust falling procedures according to the
requirements specified in GJB 150.12A-2009. Thereinto, the dust blowing test concentration is
(10.6±7)g/m3 and the dust blowing speed is 8.9m/s; the sand blowing concentration is
(1.1±0.3)g/m3, the sand blowing speed is 18m/s ~ 29m/s and the sand blowing dura...