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YS/T 95.2-2025 English PDF

YS/T 95.2: Historical versions

Standard IDUSDBUY PDFLead-DaysStandard Title (Description)Status
YS/T 95.2-2025RFQ ASK 3 days Aluminum and aluminum alloy strips and foils for heat sinks of air conditioners - Part 2: Coated strips and foils Valid
YS/T 95.2-2016145 Add to Cart Auto, < 3 mins Aluminum foil for air conditioner - Part 2: Precoated aluminum foil Valid
YS/T 95.2-2009399 Add to Cart 3 days Aluminum foil for air conditioner. Part 2: Precoated aluminium foil Obsolete
YS/T 95.2-2001359 Add to Cart 3 days Aluminium foil for air conditioner Part 2: Hydrophilic aluminium foil Obsolete


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Older Standard (superseded by this standard): YS/T 95.2-2016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 an......
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