YS/T 95.2-2016 PDF in English
YS/T 95.2-2016 (YS/T95.2-2016, YST 95.2-2016, YST95.2-2016)
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Aluminum foil for air conditioner - Part 2: Precoated aluminum foil
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| YS/T 95.2-2009 | English | 399 |
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Aluminum foil for air conditioner. Part 2: Precoated aluminium foil
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Aluminium foil for air conditioner Part 2: Hydrophilic aluminium foil
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Standards related to (historical): YS/T 95.2-2016
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YS/T 95.2-2016: PDF in English (YST 95.2-2016) YS/T 95.2-2016
YS
NON-FERROUS METAL INDUSTRY
STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
H 61
Replacing YS/T 95.2-2009
Aluminum foil for air conditioner -
Part 2. Precoated aluminum foil
ISSUED ON. APRIL 05, 2016
IMPLEMENTED ON. SEPTEMBER 01, 2016
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 Requirements ... 6
4 Test methods ... 11
5 Inspection rules ... 14
6 Marks, packaging, transport, storage ... 18
7 Order form (or contract) ... 20
Foreword
YS/T 95 “Aluminum foil for air conditioner radiator” consists of two parts.
- Part 1. Finstock;
- Part 2. Precoated aluminum foil.
This Part is Part 2 of YS/T 95.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces YS/T 95.2-2009 “Aluminum foil for air conditioner - Part 2.
Precoated aluminum foil”. Compared with YS/T 95.2-2009, the main technical
changes in this Part are as follows.
- deleted product models of P14, P23, P24, P43, P44, P51, P52, P61, P62;
- added product models of P31, P32;
- tightened harmful element limit value;
- added requirements for coating resistances to bending and acid;
- added provisions for measuring the hydrophilic angle after immersion in oil
resistance test method;
- modified requirements for coating appearance quality;
- the supplier and the purchaser are required to agree on the type of the no-
clean volatile oil for the hydrophilic angle of the test process;
- specified that harmful elements or harmful substances are tested according
to GB/T 26125, and antibacterial properties are tested according to GB/T
21866;
- modified test method for alkali resistance;
- modified test method for coating odor;
- added requirements for contact surface diameter of solvent resistant
hammer.
This Part was proposed by and shall be under the jurisdiction of National
Technical Committee on Non-ferrous Metal of Standardization Administration of
China (SAC/TC 243).
The drafting organizations of this Part. Yitong Technology Group Co., Ltd.,
Guangzhou Huigu Chemical Co., Ltd., Zhenjiang Dingsheng Aluminum Industry
Co., Ltd., Ruyuan Yao Autonomous County Yangzhiguang Hydrophilic Foil Co.,
Ltd., Jiangsu Chang Aluminum Co., Ltd., Xiamen Xiashun Aluminum Foil Co.,
Ltd.
Main drafters of this Part. Zhou Linjie, Zhou Yingchun, Dong Qibao, Li Yuefeng,
Shi Yuzhen, Zhang Jianming, Lao Xiaofeng, Wang Xiguang.
Versions of standard substituted by this Standard are.
- YS/T 95.2-2001, YS/T 95.2-2009.
Aluminum foil for air conditioner -
Part 2. Precoated aluminum foil
1 Scope
This Part of YS/T 95 specifies the requirements, test methods, inspection rules
and marks, packaging, transport, storage, quality certificate and order form (or
contract) content of precoated aluminum foil for air conditioner heat sink.
This Part is applicable to aluminum foil for air conditioner heat sink of which the
surface is covered with a corrosion-resistant layer and a hydrophilic coating
(hereinafter referred to as precoated foil).
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 1740, Methods of test for resistance to heat and humidity of paint films
GB/T 1771, Paints and varnishes - Determination of resistance to neutral salt
spray (fog)
GB/T 3199, Wrought aluminum and aluminum alloy products - Packing,
marking, transporting and storing
GB/T 6461, Methods for corrosion testing of metallic and other inorganic
coatings on metallic substrates - Rating of test specimens and manufactured
articles subjected to corrosion tests
GB/T 6682, Water for analytical laboratory use - Specification and test
methods
GB/T 9286, Paints and varnishes - Cross cut test for films
GB/T 9753, Paints and varnishes - Cupping test
GB/T 21866, Test method and effect for antibacterial capability of paints film
GB/T 22638.9, Test methods for aluminum and aluminum alloy foils Part 9.
Determination of hydrophilic property
GB/T 22638.10, Test methods for aluminum and aluminum alloy foils - Part
10. Determination of mass per unit area (surface density) of coatings
GB/T 26125, Electrical and electronic products - Determination of six
regulated substances (lead, mercury, cadmium, hexavalent chromium,
polybrominated biphenyls, polybrominated diphenyl ethers)
YS/T 95.1, Aluminum foil for air conditioner radiator - Part 1. Finstock
3 Requirements
3.1 Product classification
3.1.1 Coating structure
See Figure 1 for coating structure.
Figure 1 -- Coating structure
3.1.2 Product model as well as composition and instructions
The precoated foil is divided into 9 product models according to the coating
structure, as shown in Table 1. The model number is expressed in English
capital letter "P" plus two Arabic numerals.
Substrate
Hydrophilic coating (top coat)
Hydrophilic coating (top coat)
Corrosion resistant layer
(primer)
Corrosion resistant layer
(primer)
Table 1 -- Product model and composition
Product
model
Composition of product model
P Primer layer (first digit after P) Topcoat layer (second digit after P)
P11
Precoated foil
mark
1. Organic anti-corrosion
coating
1. Organic hydrophilic
coating
P12 2. Inorganic hydrophilic coating
P13 3. Without coating
P21 2. Inorganic passivation
coating
1. Organic hydrophilic
coating
P22 2. Inorganic hydrophilic coating
P31
3. Organic high anti-corrosion
coating
1. Organic hydrophilic
coating
P32 2. Inorganic hydrophilic coating
P33 3. Without coating
P41
4. Inorganic passivation
coating + organic high anti-
corrosion coating
1. Without coating
3.1.3 Function code
The precoated foil is divided into antibacterial, lubricated and common types
according to its functional characteristics. Antibacterial function code is "KJ".
Lubricated function code is "RH".
3.1.4 Marking
The marking of the precoated foil is expressed in the order of product name,
standard number, product model, function code, designation, state, and size
specifications. Marking examples are as follows.
Example 1. the common type precoated foil of which the designation is 8011,
the state is H22, the thickness is 0.115mm, the width is 811.0mm, the primer
layer is an organic anti-corrosion coating, and the topcoat layer is an organic
hydrophilic coating, is marked as.
Precoated foil YS/T95.2-P11-8011H22-0.115×811
Example 2. the antibacterial type precoated foil of which the designation is 1200,
the state is H24, the thickness is 0.105mm, the width is 792.0mm, the primer
layer is an organic anti-corrosion coating, and the topcoat layer is an inorganic
hydrophilic coating, is marked as.
Precoated foil YS/T95.2-P22KJ-1200H24-0.105×792
Example 3. the common type precoated foil of which the designation is 3102,
the state is H26, the thickness is 0.100mm, the width is 810.0mm, the primer
layer is organic high anti-corrosion coating, there is no topcoat layer, is marked
as.
Precoated foil YS/T95.2-P33-3102H26-0.100×810
3.2 Chemical composition
The chemical composition of the precoated foil (except Cd, Pb, Hg, Cr6+) shall
comply with the requirements of YS/T 95.1. The limits of harmful elements or
harmful substances in the precoated foil shall comply with the requirements of
Table 2.
Table 2 -- Limits of harmful elements or harmful substances
Harmful elements or substances Limit/(mg/kg)
Cadmium (Cd) ≤75
Lead (Pb) ≤90
Mercury (Hg) ≤60
Hexavalent chromium (Cr6+) ≤60
Polybrominated biphenyls (PBBs) ≤100
Polybrominated diphenyl ethers (PBDEs) ≤100
3.3 Size deviation
The size deviation of precoated foil shall comply with the provisions of YS/T
95.1.
3.4 Adhesion
The precoated foil shall be easy to expand over the entire length of the roll, no
sticking or tearing when unfolded.
3.5 Mechanical properties, process performance
The tensile mechanical properties and process properties of the precoated foil
shall meet the requirements of YS/T 95.1.
3.6 Coating performance
Coating properties shall meet the requirements of Table 3. When there are other
special requirements, the supplier and the purchaser shall negotiate and
indicate in the order form (or contract).
Table 3 -- Coating properties
Item Coating properties P13 P33 P41 P11 P21 P31 P12 P22 P32
Coating
surface
density
(single
side)
g/m2
Primer
layer
1.0~
1.5
1.5~
6.0
1.5~
6.0
0.8~
1.2
0.05
~0.1
1.5~
2.0
0.05
~0.1
0.05
~0.1
0.05~
0.1
Top
coat - 0.20~0.30 0.3~0.7
Hy
dro
ph
ilic
Initial
hydrophilic
angle -
≤10° ≤10°
Process
hydrophilic
angle
≤20° ≤15°
Lo
ng
la
stin
g h
yd
rop
hili
c a
ng
le
Co
nti
nu
ou
s im
pre
gn
ati
on
hy
dro
ph
ilic
an
gle
≤28° ≤20°
Dr
y-w
et
cy
cle
hy
dro
ph
ilic
an
gle
≤30° ≤25°
Anti-cupping No peeling of coating
Adhesion Level 0
Bending
resistance No peeling of coating
Sa
lt s
pra
co
rro
sio
res
ista
nc
Te
st
tin
e /
500 1500 1500 500 500 1000 500 500 1000
Pr
ote
cti
ve
le
ve
≥9.8 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5
He
at
an
d h
um
idit
y r
es
ista
nc
Te
st
tin
e /
500 1500 1500 500 500 1000 500 500 1000
Pr
ote
cti
ve
le
ve
≥9.8 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5
Acid resistance No black spots, white spots or blistering, falling off, etc. -
Alkali resistance No black spots, white spots or blistering, falling off, etc.
He
at
res
ista
nc
e 200°C 5 min Color unchanged
- 300°C
5 min
Yellowish or light-
loss coating Yellowish coating
Oil resistance Coating does not blister
Coating does not blister, hydrophilic angle
≤10°
Coating smell Odorless
Wash-fastness Coating does not fall off
Solvent resistance No bottoming
Antibacterial
(Escherichia coli,
Staphylococcus
aureus)
Antibacterial product’s antibacterial rate>99.0%
3.7 Appearance quality
3.7.1 The surface color of the precoated foil is determined by both parties. There
shall be no obvious chromatic aberration, leakage coating, corrosion, holes, etc.,
which affect the performance of the coating and the defects of the user. Defects
such as subtle color points, imprints, etc. that do not affect the use are allowed.
3.7.2 The precoated foil shall be tightly packed. The end surface shall be flush
and clean. There shall be no defects such as depression and dirt, allowing slight
burrs.
3.7.3 Precoated foil roll allows joints. Joints shall be clearly marked. The
number of joints per roll is not more than 1. The number of foil rolls with joints
is not more than 15% of the total number of rolls.
4 Test methods
4.1 Chemical composition
4.1.1 The chemical composition of the precoated foil (except Cd, Pb, Hg, Cr6+)
is inspected according to YS/T 95.1.
4.1.2 Harmful elements or hazardous substances are inspected according to
GB/T 26125.
4.2 Size deviation
The size deviation of precoated foil is inspected according to YS/T 95.1.
4.3 Adhesion
Adhesion is inspected by unrolling the precoated foil roll.
4.4 Mechanical properties, process performance
The tensile mechanical properties and process properties of the precoated foil
are inspected according to YS/T 95.1.
4.5 Coating surface density
Coating surface density is determined according to the method specified in
GB/T 22638.10.
4.6 Hydrophilicity
Hydrophilicity is tested according to the method specified in GB/T 22638.9. The
type of no-clean volatile oil used in the process of hydrophilic angle detection is
negotiated between the supplier and the purchaser and specified in the order
form (or contract). When the purchaser has special requirements on drying
temperature and drying time, it shall be indicated in the order form (or contract).
4.7 Anti-cupping
Carry out the test according to the provisions of GB/T 9753. Indentation depth
is 5mm.
4.8 Adhesion
Cross-cut on the sample according to the provisions of GB/T 9286, the spacing
of the cross-cut is 1mm. Cover the cross-hatch coating with an adhesive tape
that has an adhesion greater than 10N/25mm. Press to remove the air under
the adhesive tape. Quickly pull up the tape at an angle perpendicular to the
surface of the coating. Then perform the rating.
4.9 Bending resistance
Make the end of the sample (in the length direction, the area 13mm~20mm from
the end) bend 180°, that is, bend to the two planes of the sample (0T as shown
in Figure 2). Make the two flat fitting parts of the sample bend 180° (1T as shown
in Figure 2). After the folded portion of the sample is bent by 180° (2T as shown
in Figure 2), the bending shall be continued for 180° (3T as shown in Figure 2).
Adhesive tape with adhesion greater than 10N/25mm is covered on the curved
surface of the top of the folded portion of the sample (end point along the length
of the sample). Press to remove the air under the adhesive tape. Quickly pull
up the tape. Observe the coating for delamination.
Figure 2 -- Inspection steps of bending resistance
4.10 Salt spray corrosion resistance
Test according to the neutral salt spray test method specified in GB/T 1771.
Sample size 70mm × 120mm. The evaluation of the test results shall be carried
out in accordance with the provisions of GB/T 6461. The defect area and
corresponding protection level generated by the test are shown in Table 4.
Table 4 -- Defect area and corresponding protection level
Proportion of defect area taking up in sample area Protective level
≤0.02 9.8
>0.02~0.05 9.5
>0.05~0.07 9.3
>0.07~0.10 9
>0.10~0.25 8
mm
4.11 Heat and humidity resistance
The test method for heat and humidity resistance is carried out in accordance
with the provisions of GB/T 1740. The determination level is in accordance with
the provisions of GB/T 6461. The defect area and corresponding protection
level generated by the test are shown in Table 4.
4.12 Alkali resistance
Pour the freshly prepared NaOH solution (100 g/L) into a beaker (300 mL of
capacity). Place the sample in the beaker. Make the sample completely
immersed in the solution at 20°C ± 2°C for 10 min. No overlap is allowed
between samples. Take out the sample and rinse with water. Observe the
surface of the coating after drying.
4.13 Acid resistance
Pour the newly prepared hydrochloric acid solution (1+9) into a beaker (300 mL
of capacity). Place the sample in the beaker. Make the sample completely
immersed in the solution at 20°C ± 2°C for 10 min. No overlap is allowed
between samples. Take out the sample and rinse with water. Observe the
surface of the coating after drying.
4.14 Heat resistance
Place the sample at a temperature of 200°C ± 5°C for 5 min. Observe coating
color. Place the sample at a temperature of 300°C ± 5°C for 5 min. Observe
coating color.
4.15 Oil resistance
Place the sample in the no-clean volatile oil for 24h. Then put it in an oven at
140°C ± 5°C for 5min ~ 10min. Observe the surface of the coating after drying
the no-clean volatile oil. And directly determine the hydrophilic angle according
to the contact angle measuring method specified in GB/T 22638.9.
4.16 Coating smell
Take 10 pieces of 30mm × 30mm precoated foil sample. Place five samples in
a Petri dish and place at room temperature as control samples. Load another 5
samples into another dish. Bake in an oven at a temperature of 140±5°C for 10
min. Take out and cool to room temperature. Open two Petri dish lids to detect
their odor with olfactory contrast. When the baking sample is heavier than the
comparative smell, it has an odor.
4.17 Solvent resistance
Wrap a 1kg hammer with at least six layers of gauze. The diameter of the
contact surface between the hammer and the sample is 14mm ± 0.5mm. After
the iron wrapped with the gauze is filled with methyl ethyl ketone, the surface
of the sample is rubbed along the same straight path along the same straight
path, at a rate of one round trip per second. Wipe one back and forth as one
time, 30 times in total. Observe whether the bottom is exposed. The gauze shall
be kept moist during the test.
4.18 Wash-fastness
Immerse the sample in a solution (concentration. 30 g/L) of the tertiary water
and neutral detergent (pH=7.0±0.5) specified in GB/T 6682 for 72h. Test
temperature is 38°C ± 1°C. Then take the sample out. Rinse the sample with
running water and wipe it dry. Visually inspect the surface. Then attach the
adhesive tape with the adhesion greater than 10N/25mm to the sample. Press
to remove the air under the adhesive tape. Quickly pull up the adhesive tape at
an angle perpendicular to the surface of the coating. Observe whether the
coating is falling off.
4.19 Coating antibacterial property
Antibacterial property of precoated foil is inspected according to GB/T 21866.
4.20 Inspection method of appearance quality
Appearance quality is visually inspected.
5 Inspection rules
5.1 Check and acceptance
5.1.1 The precoated foil shall be inspected by the supplier to ensure that the
product quality complies with the provisions of this Part (or order contract). And
fill in the quality certificate.
5.1.2 The purchaser shall re-inspect the products received in accordance with
the provisions of this Part. If the result of the re-inspection is inconsistent with
the provisions of this Part or the order form (or contract), it shall be submitted
to the supplier in writing and shall be settled by negotiation between the supplier
and the purchaser. Objections on surface quality and size deviation shall be
submitted one month from the date of receipt of the product. Objections on other
properties shall be filed within three months from the date of receipt of the
product. If arbitration is required, the supplier and the purchaser shall jointly
conduct arbitration sampling on the purchaser’s.
5.2 Batching
Precoated foil shall be submitted for acceptance in batches. Each batch shall
be composed of the same type, same function of precoated foils with the same
type, state, size specifications and the same surface treatment process.
5.3 Weighing
The product shall be weighed according to actual weight.
5.4 Inspection items
Each batch of precoated foil shall be subject to the inspections of chemical
composition (except Cd, Pb, Hg, Cr6+), tensile strength, elongation after break,
cupping value, size deviation, adhesion, joint, appearance quality, initial
hydrophilic angle, anti-cupping, adhesion, bending resistance. The supplier
shall monitor and analyze Pb, Cd, Hg, Cr6+, polybrominated biphenyls and
polybrominated diphenyl ethers. The testing shall be performed at least once a
year to ensure that harmful elements or hazardous substances meet the
standard requirements. The alkali-washed precoated foil is also required for
alkali corrosion inspection. Other properties are not subject to exit-factory
inspection but shall be tested by the supplier according to the production state.
But the supplier must ensure that the product meet corresponding quality
requirements with process. If the user requests these items to be inspected, it
shall be indicated in the order form (or contract).
5.5 Sampling
The product sampling shall comply with Table 5.
Table 5 -- Product sampling
Inspection item Sampling rules Required sub-clause
Sub-clause of
test method
Chemical composition (except Cd, Pb, Hg,
Cr6+), size deviation, mechanical properties,
process properties
According to
YS/T 95.1 3.2, 3.3, 3.6 4.1, 4.2, 4.4
Adhesion Inspect roll by roll 3.4 4.3
Limits of harmful elements or harmful
substances, antibacterial properties of coating
Agreed by the
supplier and
the purchaser
3.2, 3.6 4.1, 4.19
Coating surface density
Take 2 rolls
from each
batch, 2
samples from
each roll
3.6 4.5
Hydrophilicity Initial hydrophilic angle
Take 2 rolls
from each
batch, 3
3.6 4.6
samples from
each roll,
sample size is
100mm×50mm
Process hydrophilic angle
Take 2 rolls
from each
batch, 3
samples from
each roll,
sample size is
100mm×50mm
Long
lasting
hydrophilic
angle
Continuous
impregnation
hydrophilic
angle
Take 2 rolls
from each
batch, 3
samples from
each roll,
sample size is
100mm×50mm 3.6 4.6
Dry-wet cycle
hydrophilic
angle
Take 2 rolls
from each
batch, 3
samples from
each roll,
sample size is
100mm×50mm
Anti-cupping
Take 2 rolls
from each
batch, 2
samples from
each roll
3.6 4.7
Adhesion
Take 2 rolls
from each
batch, 2
samples from
each roll
3.6 4.8
Bending resistance
Take 2 rolls
from each
batch, 2
samples from
each roll
3.6 4.9
Salt spray corrosion resistance
Take 2 rolls
from each
batch, 2
samples from
3.6 4.10
each roll,
sample size is
70mm×120mm
Heat and humidity resistance
Take 2 rolls
from each
batch, 2
samples from
each roll
3.6 4.11
Alkali resistance
Take 2 rolls
from each
batch, 2
samples from
each roll,
sample size is
70mm×40mm
3.6 4.12
Acid resistance
Take 2 rolls
from each
batch, 2
samples from
each roll,
sample size is
70mm×40mm
3.6 4.13
Heat resistance
Take 2 rolls
from each
batch, 2
samples from
each roll
3.6 4.14
Oil resistance
Take 2 rolls
from each
batch, 3
samples from
each roll,
sample size is
100mm×50mm
3.6 4.15
Coating smell
Take 2 rolls
from each
batch, 10
samples from
each roll,
sample size is
30mm×30mm
3.6 4.16
Solvent resistance
Take 2 rolls
from each
batch, 2
3.6 4.17
samples from
each roll
Wash-fastness
Take 2 rolls
from each
batch, 2
samples from
each roll
3.6 4.18
Appearance quality Inspection roll by roll 3.7 4.20
5.6 Determination of inspection results
5.6.1 When the chemical composition of any sample is unqualified, when the
product can distinguish the melting time, the melting point represented by the
sample is determined as unqualified. Other melting times are inspected in
sequence. Only qualified products are delivered. If the melting time cannot be
distinguished, this batch shall be rejected.
5.6.2 If the size deviation of any sample is unqualified, the product represented
by the sample is determined as unqualified.
5.6.3 When the tensile mechanical properties and process performance of any
sample are unqualified, double samples shall be taken from the batch (furnace)
product (including the product represented by the unqualified sample) or from
(including the product represented by the unqualified sample for re-inspection.
When the re-inspection results are qualified, this batch (furnace) of products
shall be accepted. If there is still failed sample performance in re-inspection
results, this batch (furnace) of products shall be rejected. The supplier is
allowed to inspect piece by piece after agreed by the supplier and the purchaser.
Only qualified products are delivered.
5.6.4 If the inspection result of harmful elements or harmful substances in any
sample or the inspection result of coating performance is unqualified, this batch
of products shall be determined as unqualified.
5.6.5 If the appearance quality of any product is unqualified, the product
represented by the sample shall be determined as unqualified.
6 Marks, packaging, transport, storage
6.1 Marks
6.1.1 Product mark
Mark (or label) the precoated foil on each roll that has passed the inspection.
The following information shall be marked.
a) inspection seal of supplier’s technical supervision department (or
signature or seal of the quality inspection personnel);
b) product name;
c) designation;
d) state;
e) batch number (roll number);
f) size specifications;
g) weight.
6.1.2 Packaging box mark
The packaging box mark for precoated foil shall comply with GB/T 3199.
6.2 Packaging, transport, storage
Precoated foil roll packaging is divided into packaging box and simple
packaging. The packaging method shall be agreed by the supplier and the
purchaser and shall be indicated in the order form (or contract). Transport and
storage are in accordance with GB/T 3199.
6.3 Quality certificate
Each batch of precoated foil shall have quality certificate that meet the
requirements of this Part, indicating the following information.
a) supplier name, address, telephone, fax;
b) product name;
c) designation;
d) state;
e) batch number (roll number);
f) size specifications;
g) net weight and number of pieces;
h) inspection results of all items and inspection seal of supplier’s quality
inspection department;
i) reference to this Part;
j) date of manufacture or date of packaging.
7 Order-form (or contract) contents
The order-form (or contract) for the product listed in this Part shall contain the
following information.
a) product name;
b) product model, function code;
c) designation;
d) status;
e) size specifications;
f) weight;
g) reference to this Part;
h) special requirements for coating properties, coating foil surface color,
packaging method, exit-factory inspection items, etc.;
i) special requirements for no-clean volatile oil type, drying temperature and
drying time when testing the hydrophilic angle of the process;
j) negotiation results when adding content outside this Part.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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