What does the test data tell you about the RDS bar?

Purpose of the experiment

Differences between Domestic (CN) Applicator rods and Imported Applicator rods in film effect and film thickness control

Experimental equipment

Experimental principle

By selecting two different brands of wire rod models with commonly used thickness of wet film in the market, scraping the film under the same sample/same experimental environment and the same substrate, after drying, using different brands of Coating Thickness Gauge to measure the thickness of dry film and coating effect, comparing imported US RDS brands and domestic (CN) brands Differences in film effect and film thickness accuracy.

The experimental process

1.1 Mold making process

1.1.1 In film: compare the actual effect of wet film after film

To highlight the authenticity, we illustrate with several videos shot on site

The performance in the wet film state is obvious. There are no scratches, wire drawing and other phenomena in the film process using RDS No. 11 and No. 18 wire rods. The whole plane is smooth and flat, and the overall film formation effect is good. Regardless of the use of domestic (CN) brand A25μm or brand B40μm, there is an obvious scratch/drawing phenomenon in the process of completing wet film Moulding.

1.1.2 After drying: compare the actual effect of the dry film after the film

Comparing the 4 dried Tinplates, the effect of film laminating on them can be seen with the naked eye. The coating prepared by RDS is very complete, and the surface does not have any wire drawing scratch phenomenon. The other two domestic (CN) brands have serious scratch drawing phenomenon. The following is a detailed comparison chart:

1.2 thickness of dry film measurement

We selected 2 domestic and foreign Coating Thickness Gauges to measure film drying coating Film thickness, determine the integrity of Film thickness on Tinplate by measurement of different points and determine the accuracy of wet film control by measurement of the same point data.

Analysis of experimental results

1/The data measured by different points shows that the data measurement of RDS at each point on the entire Tinplate is relatively uniform, and the other two brand data fluctuate greatly, which may be caused by the phenomenon of wire drawing, and also due to the selected domestic (CN) The rods are all formed, and the grooves formed by the extrusion process and the grooves formed by the wire winding process are different in shape. The process around Mayer-Rod follows the principle of Mayer-Bar, but in theory, the extrusion and wire winding should not be different except for the difference in the amount of Spreader. Miscellaneous should not be different. From this, it is inferred that the reason may exist in the process.

2/thickness of wet film accuracy control, according to the solid content of 25% of the sample and dry film measurement weighted average Film thickness value calculation results, RDS in the thickness of wet film control Accuracy is much higher than Miscellaneous two brands, especially in the thickness of wet film In the case of small, the film thickness Accuracy controlled by different types of RDS wire rods is very stable, while the other two brands show high Accuracy when the thickness of wet film is larger The smaller the wet film, the greater the difference in Accuracy, and even the 25μm brand has deviated significantly from its calibrated Film thickness.

3/Based on the above data, NBchao. Com Mall recommends that users choose imported brand rods such as RDS when the film is lower than 40μm, and choose low-priced brands according to the budget situation at 40μm.

[Objectivity Description]

This experiment is the measured data of NBchao. Com Mall laboratory and the data measured by non-Miscellaneous Measurement Institute;

The price difference ratio of the wire rod brands selected in this experiment is about 2:1, so the quality of different brands of wire rods will not be evaluated from the cost performance, but only compared from the molding effect and film thickness control Accuracy. Users choose by themselves according to actual individual ability;

This experiment objectively cannot represent the gap between the entire domestic (CN) bar and the US RDS bar. This experiment adopts a randomly selected method to sample the bar. In terms of data rigor, it only represents the 4 random bars in the experiment. Please do not generalize when reading this report.

NBchao. Com Mall

2018/6/30