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Method for detecting engineering covering power of coating

A detection method and hiding power technology, which is applied in the field of detection and evaluation of coating engineering hiding power performance, can solve problems such as inaccurate evaluation of construction performance, and achieve the effect of accurate evaluation

Inactive Publication Date: 2016-12-07
LANGFANG NIPPON PAINT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the difference between the detection method of the engineering hiding power of the coating in the prior art and the actual coating film thickness control of the coating on site, it is not possible to accurately evaluate the film thickness standard, range and color difference control requirements of the field coating control, etc. The defect of the on-site construction performance, the purpose of this invention is to provide a kind of detection method of the engineering hiding power of improved coating, take the film thickness control of on-site coating construction as a benchmark, and carry out with reference to the variation range of the film thickness in the on-site coating Experimental evaluation can more directly and accurately evaluate the performance of coatings on site

Method used

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  • Method for detecting engineering covering power of coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Testing of engineering hiding power of a kind of oil-based yellow medium paint

[0053] Use the yellow oil-based intermediate paint that was transported back from the car painting site. According to the feedback from the site, the film thickness of the paint construction is set to 40um, and the film thickness of the car body varies around 5um. There is no specific requirement for the color difference judgment.

[0054] According to the detection method of the engineering hiding power of coating of the present invention:

[0055] 1. Use an A4 tin plate and wipe it clean with a degreasing solvent.

[0056] 2. Use a ruler to divide the A4 tin plate into several parts according to the width of a grid of 3cm, such as figure 1 as shown, figure 1 Be the schematic diagram that test plate is equally divided in the detection method of the engineering hiding power of coating of the present invention, figure 1 Divide into 12 parts. And paste film thickness strips on both sides of...

Embodiment 2

[0068] Testing of engineering hiding power of a water-based topcoat

[0069] Use the water-based red topcoat to be evaluated, the matching red mid-coat and the varnish for the water-based topcoat that are transferred back from the automobile painting site. The film thickness is 15±3um, the varnish film thickness is 40±5um, and the color difference requirement is △E(45°)≤1.

[0070] According to the detection method of the engineering hiding power of coating of the present invention:

[0071] 1. Use an A4 tin plate, wipe it clean with a degreasing solvent, and evenly spray it with the red paint that is transported from the site and matched with the sample to be tested. The film thickness is controlled at 40um. After leveling, dry it in an oven at 140°C Bake for 20 minutes.

[0072] 2. Use a ruler to divide the intermediate coating board into several parts according to the width of a grid of 3cm, and then paste film thickness strips on both sides of the intermediate coating bo...

Embodiment 3

[0081] Testing of Engineering Hiding Power of a Refinish Paint

[0082] When developing a pearlescent repair paint with high chroma and brilliance compared with the current red color, it is necessary to evaluate the engineering hiding power of the repair paint after toning. The paint film thickness is 15±3um, and the repair varnish film thickness is 40±5um. The color difference requires no color difference and △E(45°)≤1.

[0083] According to the detection method of the engineering hiding power of coating of the present invention:

[0084] 1. Use an A4 tin plate, wipe it clean with a degreasing solvent, and evenly spray it with the red paint that matches the sample to be tested. The film thickness is controlled at 40um. After leveling, bake it in an oven at 140°C for 20 minutes.

[0085] 2. Use a ruler to divide the intermediate coating board into several parts according to the width of a grid of 3cm, and then paste film thickness strips on both sides of the intermediate coat...

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Abstract

The invention discloses a method for detecting engineering covering power of coating. The method comprises the following steps: treating a test plate, then coating, and drying after the coating is finished, measuring thickness of a paint film of the test plate step by step from top to bottom by adopting a film thickness gauge, finding out a position, the same with the on-site coating construction in film thickness, in the test plate as a reference position, and respectively finding areas in which chromatic aberration come into existence above and below the reference position, wherein film thickness range between an upper interval and a lower interval is namely an engineering covering power parameter of the coating; and then comparing with a construction film thickness control range, so as to judge whether the engineering covering power of the coating meets on-site construction control requirement. The method for detecting the engineering covering power of the coating takes film thickness control of the on-site coating construction as reference, experimental evaluation is carried out by referring to a variation range of the film thickness in the on-site coating, the engineering covering power of the coating is judged by virtue of visual and colorimeter data, and construction performance condition of the coating in the on-site coating can be evaluated more directly and accurately.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a method for detecting and evaluating the engineering hiding power performance of coatings. Background technique [0002] During the coating and construction process of the customer's site, the coating product is inevitably affected by the shape, flatness, spraying equipment, external environment and viscosity of the coating itself, resulting in that the coating film thickness cannot be completely consistent, and generally there are certain differences. When spraying colored paint, the difference in film thickness will lead to color difference, especially when spraying red, yellow, orange and other products with high chroma and low hiding power, the probability of color difference is high. When developing paint products, the black and white grid hiding power of the paint is generally tested, but the film thickness measured by the black and white hiding power is generally larger,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/26
CPCG01N33/26
Inventor 梅鹏杨秋红
Owner LANGFANG NIPPON PAINT
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