YS/T 95.2: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| YS/T 95.2-2025 | English | RFQ |
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Aluminum and aluminum alloy strips and foils for heat sinks of air conditioners - Part 2: Coated strips and foils
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YS/T 95.2-2025
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| YS/T 95.2-2016 | English | 145 |
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Aluminum foil for air conditioner - Part 2: Precoated aluminum foil
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YS/T 95.2-2016
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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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YS/T 95.2-2009
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| YS/T 95.2-2001 | English | 359 |
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Aluminium foil for air conditioner Part 2: Hydrophilic aluminium foil
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YS/T 95.2-2001
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Basic data | Standard ID | YS/T 95.2-2025 (YS/T95.2-2025) | | Description (Translated English) | Aluminum and aluminum alloy strips and foils for heat sinks of air conditioners - Part 2: Coated strips and foils | | Sector / Industry | Nonferrous Metallurgy Industry Standard (Recommended) | | Classification of Chinese Standard | H61 | | Classification of International Standard | 77.150.10 | | Date of Issue | 2025-04-10 | | Date of Implementation | 2025-11-01 | | Older Standard (superseded by this standard) | YS/T 95.2-2016 | | Issuing agency(ies) | Ministry of Industry and Information Technology | YS/T 95.2-2016: Aluminum foil for air conditioner - Part 2: Precoated aluminum foil---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Aluminum foil for air conditioner—Part 2. Precoated aluminum foil
ICS 77.150.10
H61
People's Republic of China Nonferrous Metals Industry Standard
Replacing YS/T 95.2-2009
Aluminum foil for air conditioner heat sink
Part 2. Coated aluminum foil
Part 2. Precoatedaluminumfoil
Published on.2016-04-05
2016-09-01 implementation
Ministry of Industry and Information Technology of the People's Republic of China
Foreword
YS/T 95 "Aluminum foil for air conditioner heat sink" is divided into two parts.
--- Part 1. Substrate;
--- Part 2. Coated aluminum foil.
This part is the second part of YS/T 95.
This part is drafted in accordance with the rules given in GB/T 1.1-2009.
This section replaces YS/T 95.2-2009 "Aluminum foil for air conditioner heat sinks Part 2. Coated aluminum foil", with YS/T 95.2-2009
In comparison, the main technical changes are as follows.
--- Removed P14, P23, P24, P43, P44, P51, P52, P61, P62 product models;
---Added P31, P32 product models;
--- Increased the limit value of harmful elements;
--- Increased coating resistance to bending and acid resistance;
--- The oil resistance test method adds the requirement to measure the hydrophilic angle after soaking;
--- Modified the requirements for the appearance quality of the coating;
--- require both the supplier and the buyer to agree on the type of no-clean volatile oil for the hydrophilic angle of the test process;
--- It is clear that harmful elements or harmful substances are tested according to GB/T 26125, and the antibacterial properties are tested according to GB/T 21866;
--- Modified the test method for alkali resistance;
---Modified test method for coating odor;
--- Increased the solvent resistance of the hammer contact surface diameter requirements.
This part is proposed and managed by the National Nonferrous Metals Standardization Technical Committee (TC/SC243).
This section drafted by. Yitong Technology Group Co., Ltd., Guangzhou Huigu Chemical Co., Ltd., Zhenjiang Dingsheng Aluminum Co., Ltd.,
Yangzhiguang Hydrophilic Foil Co., Ltd., Jiangsu Chang Aluminum Co., Ltd., Xiamen Xiashun Aluminum Foil Co., Ltd.
The main drafters of this section. Zhou Laijie, Zhou Yingchun, Dong Qibao, Li Yuefeng, Shi Yuzhen, Zhang Jianming, Yan Xiaofeng, Wang Xiguang.
The previous versions of the standards replaced by this section are.
---YS/T 95.2-2001, YS/T 95.2-2009.
Aluminum foil for air conditioner heat sink
Part 2. Coated aluminum foil
1 Scope
This part of YS/T 95 specifies the requirements, test methods, inspection rules and signs, packaging and transportation of coated aluminum foil for air conditioner fins.
The contents of the transport, storage, quality certificate and order form (or contract).
This section applies to aluminum foil (hereinafter referred to as coated foil) for air-conditioning fins coated with a corrosion-resistant layer and a hydrophilic coating.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article.
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 1740 paint film moisture resistance test method
Determination of neutral salt spray resistance of GB/T 1771 paints and varnishes
GB/T 3199 Aluminum and aluminum alloy processing products packaging, marking, transportation, storage
GB/T 6461 Metal and other infinite coatings on metal substrates after corrosion test samples and test pieces
GB/T 6682 Analytical laboratory water specifications and test methods
GB/T 9286 color and varnish paint film cross-cut test
GB/T 9753 paint and varnish cupping test
GB/T 21866 antibacterial coating (paint film) antibacterial determination method and antibacterial effect
Test methods for aluminium foil - Part 9. Determination of hydrophilicity
Test methods for aluminium foil - Part 10. Determination of surface density of coatings
GB/T 26125 Determination of six restricted substances (lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls and polybrominated diphenyl ethers)
YS/T 95.1 Aluminum foil for air conditioner fins Part 1. Substrate
3 requirements
3.1 Product Classification
3.1.1 Coating structure
A schematic diagram of the coating structure is shown in Figure 1.
Figure 1 Schematic diagram of the coating structure
3.1.2 Product model and its composition and description
The coated foil is divided into nine product models according to the coating structure, as shown in Table 1. Product model in English capital letter "P" plus two Arab
Digital form representation.
Table 1 Product model and composition
Product number
Product model
P primer layer (first digit after P) topcoat layer (second digit after P)
P11
P12
P13
P21
P22
P31
P32
P33
P41
Coated foil logo
1. organic anti-corrosion coating
2. inorganic passivation coating
3. Organic high anti-corrosion coating
4. Inorganic passivation coating organic high anti-corrosion coating
1. organic hydrophilic coating
2. inorganic hydrophilic coating
3. no coating
1. organic hydrophilic coating
2. inorganic hydrophilic coating
1. organic hydrophilic coating
2. inorganic hydrophilic coating
3. no coating
1. no coating
3.1.3 Function Code
The coated foil is classified into an antibacterial type, a lubricating type, and a common type according to functional characteristics. The antibacterial function code is “KJ”, and the lubrication function code is
"RH".
3.1.4 mark
The marking of the coated foil is expressed in the order of product name, standard number, product model, function code, grade, status, and size specifications.
An example is as follows.
Example 1. 8011 grade, H22 state, thickness 0.115mm, width 811.0mm, primer layer is organic anti-corrosion coating, topcoat layer is organic hydrophilic coating
Layer of common coated foil, marked as.
Coating foil YS/T 95.2-P11-8011H22-0.115×811
Example 2. 1200 grade, H24 state, thickness 0.105mm, width 792.0mm, primer layer is organic anti-corrosion coating, topcoat layer is inorganic hydrophilic coating
Layer of antibacterial coated foil, labeled.
Coating foil YS/T 95.2-P22KJ-1200H24-0.105×792
Example 3. 3102 grade, H26 state, thickness 0.100mm, width 810.0mm, primer layer is organic high anti-corrosion coating, common type coating without topcoat layer
Layer foil, marked as.
Coated foil YS/T 95.2-P33-3102H26-0.100×810
3.2 Chemical composition
The chemical composition of the coated foil (except Cd, Pb, Hg, Cr6) shall comply with the requirements of YS/T 95.1, harmful elements or harmful substances in the coated foil.
The limit shall comply with the requirements of Table 2.
Table 2 Limits of harmful elements or harmful substances
Limit of harmful elements or harmful substances/(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 Dimensional deviation
The coating foil size deviation shall be in accordance with YS/T 95.1.
3.4 Adhesion
The coated foil should be easy to unwind over the entire length of the roll and will not stick or tear when unrolled.
3.5 Mechanical properties, process performance
The room temperature tensile mechanical properties and process properties of the coated foil should be in accordance with YS/T 95.1.
3.6 Coating properties
The coating properties shall comply with the requirements of Table 3. When there are other special requirements, the supplier and the buyer shall negotiate and indicate in the order form (or contract).
Table 3 Coating properties
project
Coating performance
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 0.8~1.20.05~0.11.5~2.00.05~0.10.05~0.10.05~0.1
Topcoat layer - 0.20~0.30 0.3~0.7
Initial hydrophilic angle
Process hydrophilic angle
lasting
Hydrophilic
Continuous impregnation
Hydrophilic angle
Dry-wet cycle
Hydrophilic angle
≤10° ≤10°
≤20° ≤15°
≤28° ≤20°
≤30° ≤25°
Anti-cupping coating without peeling
Adhesion level 0
Anti-bending coating does not fall off
Salt spray resistance
Corrosive
Test time/h 500 1500 1500 500 500 1000 500 500 1000
Protection level ≥9.8 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5 ≥9.5
Table 3 (continued)
project
Coating performance
P13 P33 P41 P11 P21 P31 P12 P22 P32
Heat and humidity resistance
Test time/h 500 1500 1500 500 500 1000 500 500 1000
Protection level ≥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.
Heat resistance
200 ° C 5 min color unchanged
300 ° C 5 min coating yellowish or loss of light coating yellow
Oil-resistant coating, non-foaming coating, non-foaming, hydrophilic angle ≤10°
Coating smell without odor
The cleaning agent coating does not fall off
Solvent resistance without bottoming
Antibacterial (Escherichia coli,
Staphylococcus aureus
Antibacterial product antibacterial rate >99.0%
3.7 Appearance quality
3.7.1 The surface color of the coated foil shall be determined by the supplier and the buyer. There shall be no obvious color difference, leakage coating, corrosion, holes, etc., affecting the coating performance and the user.
The defects used exist. Defects such as subtle color points, imprints, etc., which do not affect the use, are allowed.
3.7.2 The coated foil should be tightly packed, the end surface should be flush and clean, and there should be no defects such as depression and dirt, and slight burrs are allowed.
3.7.3 Coated foil rolls allow joints, joints should be clearly marked, the number of joints per roll is not more than 1, the number of foil rolls with joints is not greater than the total volume
15% of the number.
4 Test methods
4.1 Chemical composition
4.1.1 The chemical composition of the coated foil (except Cd, Pb, Hg, Cr6) shall be inspected according to YS/T 95.1.
4.1.2 Harmful elements or hazardous substances shall be inspected according to GB/T 26125.
4.2 Size deviation
The dimensional deviation of the coated foil was checked in accordance with YS/T 95.1.
4.3 Adhesion
Adhesion is checked by unrolling the coated foil roll.
4.4 Mechanical properties, process performance
The room temperature tensile mechanical properties and process properties of the coated foil were tested in accordance with YS/T 95.1.
4.5 Coating surface density
The surface density of the coating was measured according to the method specified in GB/T 22638.10.
4.6 Hydrophilicity
Hydrophilicity was tested according to the method specified in GB/T 22638.9. Process for hydrophilic angle detection with no-clean volatile oil type by both supply and demand
Negotiate and indicate in the order form (or contract). When the demander has special requirements on drying temperature and drying time, it should be in the order form (or contract).
Note.
4.7 Anti-cupping
The test was carried out in accordance with the provisions of GB/T 9753, and the indentation depth was 5 mm.
4.8 Adhesion
Cross-hatch the specimen according to the provisions of GB/T 9286, and the spacing between the grids is 1 mm. Adhesive tape with adhesion greater than 10N/25mm
Cover the cross-hatch coating, press to remove the air under the adhesive tape, pull the tape quickly at an angle perpendicular to the surface of the coating, and then proceed
Rating.
4.9 resistance to bending
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 (such as
0T) shown in Figure 2. Bend the two flat fitting portions of the specimen by 180° (1T as shown in Figure 2), and then bend the folded portion of the specimen by 180°.
(2T as shown in Fig. 2), continue to bend 180° (3T as shown in Fig. 2). Cover the adhesive tape with an adhesion greater than 10N/25mm
The curved surface of the top end of the folded portion of the sample (the end point along the length of the sample) is pressed to remove the air under the adhesive tape, and the tape is quickly pulled up.
Observe the coating for delamination.
Figure 2 Schematic diagram of the bending resistance test procedure
4.10 Salt spray corrosion resistance
Test according to the neutral salt spray test method specified in GB/T 1771, the sample size is 70mm×120mm, and the test results are evaluated.
According to 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
Defect area as a percentage of sample area /% Protection 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
4.11 Resistance to heat and humidity
The test method for moisture and heat resistance shall be carried out in accordance with the provisions of GB/T 1740, and the judgment level shall be carried out in accordance with the provisions of GB/T 6461.
The area of the defect and the corresponding protection level are shown in Table 4.
4.12 Alkali resistance
Pour the newly prepared NaOH solution (100g/L) into a beaker (300mL capacity), place the sample in the beaker, and let the sample
At 20 ° C ± 2 ° C, completely immersed in the solution for 10 min, no overlap is allowed between the samples. Remove the sample and rinse it with water. Dry it and observe the coating.
surface.
4.13 Acid resistance
Pour the newly prepared hydrochloric acid solution (1 9) into a beaker (capacity. 300 mL), place the sample in a beaker, and make the sample at 20 °C ±
At 2 ° C, completely immersed in the solution for 10 min, no overlap was allowed between the samples. The sample was taken out and rinsed with water, and the surface of the coating was observed after drying.
4.14 Heat resistance
The sample was placed at a temperature of.200 ° C ± 5 ° C for 5 min to observe the color of the coating; the sample was placed at a temperature of 300 ° C ± 5 ° C for 5 min,
Observe the color of the coating.
4.15 Oil resistance
The sample is placed in the no-clean volatile oil for 24h, and then placed in an oven at 140 ° C ± 5 ° C for 5 min ~ 10 min, no cleaning
After the volatile oil is dried, the surface of the coating is observed, and the hydrophilic angle is directly determined according to the contact angle measuring method specified in GB/T 22638.9.
4.16 Coating odor
Ten sheets of 30 mm × 30 mm coated foil samples were taken, and five of the samples were placed in a petri dish and placed at room temperature as a control sample.
The other 5 samples were placed in another petri dish, baked in an oven at a temperature of 140 ± 5 ° C for 10 min, and taken out and cooled to room temperature.
Open the two petri dish caps to detect the odor by olfactory contrast. When the baking sample is heavier than the comparative odor, the odor is judged.
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 specimen is 14mm ± 0.5mm. a hammer that will wrap a gauze
After satiding with methyl ethyl ketone, follow the same straight path on the surface of the sample, and rub the surface of the sample in parallel with the hammer at a speed of one round trip per second.
Wipe one back and forth for a total of 30 times to observe whether the bottom is exposed. The gauze should be kept moist during the test.
4.18 Cleaning agent
Immerse the sample in a solution of three grade water and neutral detergent (pH=7.0±0.5) specified in GB/T 6682 (concentration. 30g/L)
Immerse for 72 h and the test temperature is 38 °C ± 1 °C. Then take out the sample, rinse the sample with tap water, and visually inspect the surface.
Apply adhesive tape with adhesive force greater than 10N/25mm to the sample and press to remove the air under the adhesive tape to perpendicular to the surface of the coating.
Quickly pull up the adhesive tape at an angle to see if the coating is peeling off.
4.19 Coating antibacterial
The antibacterial property of the coated foil is tested according to GB/T 21866.
4.20 Appearance quality inspection method
The quality of the appearance was visually inspected.
5 Inspection rules
5.1 Inspection and acceptance
5.1.1 The coated foil shall be inspected by the supplier to ensure that the quality of the product complies with the provisions of this part (or the order contract) and fill in the quality certificate.
5.1.2 The acquirer shall re-inspect the products received in accordance with the provisions of this section. Re-inspection results and provisions of this part or order form (or contract)
In case of discrepancy, it shall be submitted to the supplier in writing and resolved by negotiation between the supplier and the buyer. Objections that are subject to surface quality and dimensional deviation should be received
The product is filed one month from the date of the product, and the objection to other performance shall be filed within three months from the date of receipt of the product. If you need arbitration, supply and demand double
The party shall jointly conduct arbitration sampling at the demand side.
5.2 Batch
The coated foil shall be submitted for acceptance in batches, and each batch shall be of the same grade, state, size specification and the same model produced by the same surface treatment process,
The same functional code consists of a coated foil.
5.3 Weight
The product should be weighed.
5.4 Inspection items
Each batch of coated aluminum foil should be chemically composed (except Cd, Pb, Hg, Cr6), tensile strength, elongation after fracture, cupping value, and size deviation.
Test for poor adhesion, adhesion, joint quality, appearance hydrophilicity angle, cupping resistance, adhesion, and bending resistance. The supplier shall deal with Pb, Cd, Hg,
Monitoring and analysis of Cr6, polybrominated biphenyls and polybrominated diphenyl ethers, at least once a year, to ensure that harmful elements or hazardous substances meet the standards
begging. For the user to use the alkali-washed coated aluminum foil, it is also necessary to carry out the alkali resistance test. The other properties are not tested by the factory, and the supplier is based on the production situation.
In case of testing, the supplier shall ensure that the product meets the corresponding quality requirements by the process. If the user requests these items to be inspected, the order shall be made.
Indicated in the order (or contract).
5.5 Sampling
Product sampling should be in accordance with Table 5.
Table 5 Product sampling
Inspection item sampling requirements requirements chapter number test method chapter number
Chemical composition (except Cd, Pb, Hg, Cr6),
Dimensional deviation, mechanical properties, process performance
Press YS/T 95.1 3.2, 3.3, 3.6 4.1, 4.2, 4.4
Adhesive roll-to-roll test 3.4 4.3
Limitation of harmful elements or harmful substances, coating antibacterial supply and demand sides negotiate 3.2, 3.6 4.1, 4.19
The surface density of the coating is 2 rolls per batch, and 2 samples per coil are 3.6 4.5
Hydrophilic
Initial hydrophilic angle
Process hydrophilic angle
lasting
Hydrophilic angle
Continuous impregnation of hydrophilic angle
Dry-wet cycle hydrophilic angle
Take 2 rolls per batch and take 3 samples per roll.
The sample size is. 100mm × 50mm
Take 2 rolls per batch and take 3 samples per roll.
The sample size is. 100mm × 50mm
Take 2 rolls per batch and take 3 samples per roll.
The sample size is. 100mm × 50mm
Take 2 rolls per batch and take 3 samples per roll.
The sample size is. 100mm × 50mm
3.6
3.6
4.6
4.6
Anti-cupping force 2 rolls per batch, 2 samples per roll 3.6 4.7
Adhesive extraction of 2 rolls per batch, 2 samples per roll 3.6 4.8
Bending resistance 2 rolls per batch, 2 samples per roll 3.6 4.9
Salt spray corrosion resistance
Take 2 rolls per batch and take 2 samples per roll.
The sample size is. 70mm × 120mm
3.6 4.10
Moisture and heat resistance 2 volumes per batch, 2 samples per coil 3.6 4.11
Alkali resistance
Take 2 rolls per batch and take 2 samples per roll.
The sample size is. 70mm × 40mm
3.6 4.12
Acid resistance
Take 2 rolls per batch and take 2 samples per roll.
The sample size is. 70mm × 40mm
3.6 4.13
Heat resistance 2 rolls per batch, 2 samples per roll 3.6 4.14
Oil resistance
Take 2 rolls per batch and take 3 samples per roll.
The sample size is. 100mm × 50mm
3.6 4.15
Coating smell
Take 2 rolls per batch and take 10 samples per roll.
The sample size is. 30mm × 30mm
3.6 4.16
Solvent resistance 2 rolls per batch, 2 samples per roll 3.6 4.17
Washing agent 2 rolls per batch, 2 samples per roll 3.6 4.18
Appearance quality by volume inspection 3.7 4.20
5.6 Determination of test 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 judged to be unqualified, and the other melting times are
Sub-test, qualified delivery. If the melting is not possible, the batch is judged to be unqualified.
5.6.2 If the dimensional deviation of any sample is unqualified, the product represented by the sample is judged to be unqualified.
5.6.3 If the tensile mechanical properties and process properties of any sample are unqualified, the batch (furnace) product shall be included (including the unqualified sample generation).
In the product of the table) (or on the product represented by the unacceptable sample), double the number of samples to repeat the test. Repeat the test
If the results are all qualified, the batch (furnace) product is judged to be qualified. If there is still unsatisfactory sample performance in the repeated test results, the batch (furnace) product is not judged.
qualified. The supplier and the buyer agree to allow the supplier to inspect the parts one by one, and the qualified ones deliver the goods.
5.6.4 If the test result of harmful elements or harmful substances in any sample or the test result of coating performance is unqualified, the batch of products is judged to be unqualified.
5.6.5 If the appearance quality of any product is unqualified, the product represented by the sample is judged to be unqualified.
6 Marking, packaging, transportation, storage
6.1 mark
6.1.1 Product logo
Mark (or label) the coated foil on each roll that has passed the inspection. The contents are as follows.
a) the inspection of the technical supervision department of the supplier (or the signature or seal of the quality inspection personnel);
b) product name;
c) brand;
d) status;
e) batch number (volume number);
f) size specifications;
g) Weight.
6.1.2 Box sign
The package label of the coated foil shall comply with the provisions of GB/T 3199.
6.2 Packaging, transportation and storage
The coated foil roll package is divided into a package and a simple package. The package should be agreed upon by the supplier and the buyer and placed in the order form (or contract).
Bright. Transportation and storage shall be carried out in accordance with the provisions of GB/T 3199.
6.3 Quality Certificate
Each batch of coated foil shall have a quality certificate in accordance with the requirements of this section, stating the following.
a) supplier name, address, telephone, fax;
b) product name;
c) brand;
d) status;
e) batch number (volume number);
f) size specifications;
g) net weight and number of pieces;
h) inspection results and inspection by the supplier's quality inspection department;
i) the number of this part;
j) Date of manufacture or date of packing.
7 Order form (or contract) content
The following should be included in the order form (or contract) for ordering the products listed in this section.
a) product name;
b) product model number and function code;
c) brand;
d) status;
e) size specifications;
f) weight;
g) the number of this part;
h) special requirements for coating properties, coating foil surface color, packaging method, factory inspection items, etc.;
i) special requirements for the type of no-clean volatile oil used in the process of detecting the hydrophilic angle of the process, drying temperature and drying time;
j) The result of the negotiation when adding content outside this section.
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