Measurement of Film Thickness of Aluminum Honeycomb Panel

根据GB/T23443-2009Definition of National Standard for Aluminum Panel for Building Decoration,aluminum honeycomb panel指“Architectural decorative veneer layer with aluminum or aluminum alloy as the substrate, processed and formed with protective and decorative coating or anodic oxidation film on the decorative surface. At present, electrostatic spraying technology is widely used in the industry when spraying aluminum veneer, because electrostatic spraying has higher requirements on the temperature and humidity of the painting room. If the control is not good, the quality of the painting coating will be greatly affected. And electrostatic spraying is divided“Powder spraying”和“Liquid spraying”。

aluminum honeycomb panel在喷漆、烘干、自然降温之后，会进行出厂前的质检阶段，主要有膜厚检测和色差检测。这里主要讲膜厚检测，膜厚检测通常会采用膜厚仪进行检测。在这里有几个概念要简单介绍一下，“local film thickness”、“average film thickness”和“Minimum local film thickness”. among them,“local film thickness”Refers to a certain area on the decorative surface of the aluminum veneer not larger1㎝?The arithmetic average of the measured values obtained by not less than three film thickness measurements in the surface of the survey.;“average film thickness”Refers to at least five points measured on the decorative surface of aluminum veneer(Four corners and a center point)The arithmetic average of the local film thickness values.

“Minimum local film thickness”The minimum value of several local film thickness values measured on the decorative surface of the aluminum veneer is a very important parameter. In liquid spraying, the average film thickness of fluorocarbon spraying is greater than or equal30μm(1μm为1Micron, yes10?-6米), the minimum local film thickness should reach25μm;The average film thickness of fluorocarbon triple coating should be greater than or equal40μm, the minimum local film thickness should be greater than or equal34μm;The average film thickness of fluorocarbon four coating shall be greater than or equal65Micron, the minimum local film thickness should be greater than or equal55μm. The average film thickness of polyester liquid spraying is greater than or equal25μm, the minimum local film thickness should be greater than or equal20μm. In powder spraying, the minimum local film thickness of fluorocarbon spraying should be greater than or equal30μm, the minimum local film thickness of polyester spraying should be greater than or equal40μm。

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