Coating Hiding Power Test Using Stepped Film Thickness
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Solution Overview
Problem
Existing methods for testing the hiding power of coatings face challenges in achieving uniform and accurate coating application, particularly for coatings with high hiding power, where slight film thickness differences are critical for evaluation.
Innovation Solution
The method involves using multiple black-and-white hiding testing materials with a black-and-white pattern, applying the coating in a stepwise manner to achieve target film thickness values differing by equal intervals, curing the coating, and evaluating the hiding power by comparing the testing materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the coating is applied sequentially to stepped surfaces by shifting and coating sections one by one, then the coating can be applied to create thickness variations, but it becomes hard to apply the coating uniformly and accurately
Solution Approach 1:
The invention divides the coating application process into multiple separate coating units, each handling a specific section. Instead of sequentially coating stepped surfaces with one complex process, multiple coating units work in parallel, each applying coating to its designated section. This segmentation simplifies the operation of each individual coating unit while achieving the overall goal of creating thickness variations across different sections.
Solution Approach 2:
The invention transitions from a sequential one-dimensional coating process to a parallel multi-dimensional approach. Multiple coating units are arranged spatially to coat different sections simultaneously, converting the time-based sequential process into a space-based parallel process. This dimensional change enables uniform and accurate coating application across all sections without the complexity of sequential stepped surface coating.
2Measurement precision
If multiple coating applications are performed to achieve precise film thickness, then the hiding power evaluation becomes more accurate, but the time and complexity of the testing process increases
Solution Approach 1:
The invention performs preliminary coating applications in parallel across multiple sections before final evaluation. By using multiple coating units to simultaneously apply coating to different sections with predetermined thickness variations, the system establishes the necessary thickness gradients in advance, eliminating the need for time-consuming sequential re-coating operations to achieve the required precision.
Solution Approach 2:
The invention creates multiple copies of the coating application process through parallel coating units. Each coating unit replicates the coating application function but operates independently on different sections. This copying approach enables simultaneous achievement of multiple coating thicknesses, reducing the overall testing time while maintaining the precision required for accurate hiding power evaluation.
Data Source
AI summary
A method of testing the hiding power of a coating using a plurality of black-and-white hiding testing materials each having a black-and-white pattern includes: arranging the plurality of testing materials side by side spaced substantially equal to each other; applying the coating to the plurality of testing materials, altering the number of times of the coating for each testing material such that film thickness values of the plurality of testing materials is different stepwise; curing the coating applied to the plurality of testing materials; evaluating the black-and-white hiding power of the coating by comparing each of the plurality of testing materials with other of the plurality of testing materials.