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家电用耐指纹镀锌板有何要求

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家电用耐指纹镀锌板有何要求

天物彩板专注彩板行业16年——更多家电专用彩涂板定制_耐指纹彩钢卷生产厂家请拨打网站上方电话咨询


家用电器对指纹电阻要求较高,应检测以下性能:
(1) 耐腐蚀性
指纹板的耐腐蚀性不仅要直接测试,还要在碱性脱脂和6mm挤压加工后用杯形测试仪进行测试。一般来说,未经处理的指纹板在96小时的盐雾试验中,以及脱脂和挤压后72小时和64小时的氧化面积应小于5%。
(2) 电导率
为了保证电子电器外壳具有良好的抗静电性能,3C厂商一般要求防指纹产品的表面电阻应小于一定范围。
(3) 耐湿热性

耐湿热试验是一种实验室模拟试验,旨在检验产品在运输和储存于相对恶劣的高温高湿环境中后,其表面是否能保持发黑和白锈。方法是将试样重叠后施加恒压,置于50℃和98%湿度下,120小时后检查色差变化。
(4) 耐高温性
部分用户在产品制造过程中,由于需要返工,多次进入涂料固化炉。他们希望防指纹产品的表面经过多次高温烘烤后不会变黄。样品在240℃下自然变色,然后进行4次自然变色。
(5) 指纹电阻
方法是将少量凡士林涂在样品表面,用脱脂棉均匀铺开,将多余部分擦掉,然后检查色差变化。
无铬防指纹板性能技术要求见下表。

The requirements of fingerprint resistance for household appliances are high, and the following properties should be tested:

(1) Corrosion resistance
The corrosion resistance of fingerprint plate should not only be tested directly, but also be tested after alkaline degreasing and 6 mm extrusion processing with cupping tester. Generally, the oxidation area of untreated fingerprint plate should be less than 5% in 96 h salt spray test, and 72 h and 64 h after degreasing and extrusion.
(2) Conductivity
In order to ensure that the electronic and electrical enclosures have good static resistance, 3C manufacturers generally require that the surface resistance of fingerprint resistant products should be less than a certain range.
(3) Hygrothermal resistance
The hygrothermal resistance test is a laboratory simulation experiment designed to examine whether the product can keep its surface from blackening and white rust after being transported and stored at relatively severe high temperature and humidity. The method is to apply constant pressure after overlapping the test samples, place them at 50 ℃ and 98% humidity, and check the change of color difference after 120 hours.
(4) High temperature resistance
Some users repeatedly enter the coating curing furnace due to the need of rework during the manufacturing process of the products. They hope that the surface of fingerprint resistant products will not turn yellow after several times of high-temperature baking. The method is to bake the sample at 240 ℃ for 20 minutes, then cool it naturally and cycle it for 4 times, and then check the change of color difference.
(5) Fingerprint resistance
The method is to apply a small amount of Vaseline on the surface of the sample, spread it evenly with absorbent cotton, and wipe off the excess part, and then check the change of color difference.
The technical requirements for the performance of chromium free fingerprint resistant board are shown in the table below.

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