Circle Method Adhesion Tester for Paint Film

The circle method instrument for paint film adhesion uses a fixed needle to draw overlapping circles on the paint film surface at a constant speed, and evaluates adhesion based on the degree of paint film peeling according to a 7-level standard. It is used to verify the bonding strength between the coating and the substrate, commonly applied in quality inspections for industries such as automotive and furniture.
Selection
When selecting, consider the hardness of the material being tested to match the stylus specifications, check the stability of the turntable's rotational speed, confirm that the load range covers the testing standards, observe whether the reading device is clear, and ensure that the instrument has standard metrological certification.
Measurement method

Terms

Standards

Instruments

The paint film adhesion was measured by the circular trace method, the drawing diaMeter was 0-10.5 mm, and the Working Travel was 80mm. The integrity of the paint film was evaluated according to seven grades, and the operation was simple and reliable.

$ 404.00

The paint film adhesion was measured by the circular trace method, the drawing diaMeter was 0~ 10.5mm, and the Working Travel was 80mm. The integrity of the paint film was evaluated according to seven grades, and the operation was simple and reliable.

$ 267.00

Rotation speed 80rpm, Working Travel 80mm, in line with international standards, to ensure accurate and reliable film adhesion assessment.

$ 373.00

The adhesion was measured by the circular trace method, the drawing diaMeter was 0~ 10.5mm, and the Working Travel ≥ 80mm. The integrity of the paint film was evaluated by seven grades, and the operation was simple and conformed to the GB/T1720 standard.

$ 444.00

Electric Circle-drawing is used to ensure uniform speed and constant strength, Travel 20-80mm adjustable, Rotation speed 10-120 +/- 1 rpm adjustable, equipped with automatic judgment prompts and precision dual rail system to improve test Repeatability and data accuracy.

$ 1397.00

Adopt the circular roller scratch method to evaluate the adhesion grade, describe the adjustable diaMeter of 0-10.5 mm, equipped with four weights to achieve 200-1000g loading, table Travel ≥ 80mm, manual operation is stable and reliable.

$ 412.00

Set cross-cut adhesion, film thickness and Buchholz Crowd Hardness three test functions in one, cross-cut knife 6 blade spacing 1mm/2mm, Crowd knife load 500 +/- 5g, using the destruction Measurement principle.

$ 348.00

Hand type easy to operate, load 1000g, standard 6B-6H pencil, suitable for film hardness testing, test temperature 23 +/- 2 ℃ and Humidity 50 +/- 5% environment.

$ 341.00

Vacuum hardened stainless steel material, cutting depth can be accurately adjusted, weight only 352g easy to carry, suitable for different film thickness and substrate adhesion testing.

$ 1127.00

The hand wheel drive is used to realize the synchronization of the table movement and the needle drawing circle, the drawing diaMeter can be adjusted from 0 to 10.5mm, and it is equipped with 808 stylus and graded weight.

$ 267.00

Equipped with three swirl/spin cutter heads, the tooth spacing is 1mm, 2mm and 3mm respectively, and it is designed according to ISO2409 standard for accurate evaluation of coating adhesion performance.

$ 183.00

11 tooth cutter design, 2mm pitch, single-sided simple cutter head, can carry out cross-cut experiment, test coating adhesion, in line with a number of international standards.

$ 186.00

Hardness High Abrasion Resistance, cutting speed 20-50mm/s, suitable for film thickness 0~ 60μm, Handheld design is convenient for laboratory and field use.

$ 135.00

It adopts 11-tooth cutter design, provides four spacing options from 1mm to 3mm, and is suitable for paint film adhesion testing with a thickness of less than 250mm. The operation is simple and the results are accurate and reliable.

$ 146.00

The drying process of paint film and putty film can be accurately measured by using circular track needle design, equipped with four different radius needle (R0.25/0.5/1.0/1 mm), and the track period is 24h/r.

$ 223.00

Articles

The adhesion tester employs a comparative analysis of methods including the cross-cut test, the scratch test, and the pull-off test.
This article compares three commonly used adhesion testing methods: the cross-cut test, the scratch test, and the pull-off test.
Circle method adhesion tester for evaluating the bonding strength of organic coatings
This article introduces how the circle method adhesion tester evaluates the bonding force between organic coatings and substrates. The instrument uses a stylus to draw a spiral line on the coating surface, and the adhesion level is assessed based on the number of circles before the coating begins to peel off. A smaller number indicates stronger adhesion.
Circle Method Adhesion Tester for Evaluating the Adhesion of Paint Coatings by the Circular Rolling Line Method
The rolling circle method is a technique for testing the adhesion of paint coatings using a circle-drawing instrument. The instrument employs a fixed-load stylus to draw a continuous circular trace on the coating at a constant speed, and the adhesion level is assessed based on the peeling condition of the scratch.
Comparison of the Three Principles of Paint Film Adhesion Testers
There are primarily three principles for paint film adhesion testers, and selection should be comprehensively considered based on the coating characteristics, substrate type, and testing purpose.
Operation Specification for Circular Scratch Adhesion Tester
The circle method adhesion tester is used to evaluate the adhesion strength between coatings and substrates. Before operation, it is necessary to inspect the instrument, prepare samples, and control the ambient temperature and humidity. During testing, the sample should be secured, appropriate load and scratch spacing should be selected, and the stylus should be moved at a constant speed to create a circular scratch.
Correlation of Evaluation Results Among Circle Method, Grid Method, and Pull-Off Method in Adhesion Assessment
This article mainly discusses three common methods used in coating adhesion testing: the cross-cut test, the scratch test, and the pull-off test. The choice of method should be based on the specific characteristics of the coating and the testing objectives. Sometimes, combining multiple methods can provide a more comprehensive evaluation of adhesion performance.
Adhesion Test of Paint Film: Cross-Cut Method and Pull-Off Method
Film adhesion is a key performance indicator for evaluating the bond strength between a coating system and the substrate, with the cross-cut test and the pull-off test being two widely applied standard testing methods.