The paint film cross-cutting device is designed and manufactured according to the ISO2409-1974 standard. It is mainly suitable for the determination of the adhesion of organic coatings. Not only for laboratories, but also for construction sites under various conditions.
The working principle and scope of the film cross-cutting device:
The instrument cuts and penetrates the coating pattern by a tool of a certain specification, and the finished pattern is classified into six levels to evaluate the resistance of the coating from the substrate separation.
This cross-cutting machine has three-size multi-blade cutting knives (1mm, 2mm, 3mm) which can be selected according to different experimental conditions. The multi-blade cutter with 1mm pitch is suitable for test strips with a coating thickness of <60um. The multi-blade cutter with 2mm spacing is suitable for test strips with a coating thickness of <60~120um. The multi-blade cutting cutter with 3mm spacing is for special purposes. Designed.
Paint film cross-cutting features:
It is used to uniformly draw a square of a certain size, and the degree of adhesion of the coating film to the substrate is evaluated by evaluating the integrity of the coating film in the square, which is represented by 'level'. It is mainly used for the determination of the adhesion of organic paint cross-cutting method, not only for the laboratory, but also for the construction site under various conditions. (This blade and process is only suitable for adhesion testing of coatings on non-metallic and soft metal substrates, requiring a balanced force to allow each scratch to pass through the coating).
Paint film cross-cutting technical parameters:
★ The spacing of multi-blade cutters is:
★The multi-blade cutter top line is:
Not less than 0.003mm (1±0.01mm)
Not less than 0.006mm (2±0.01mm, 3±0.01mm)
★Multi-blade cutter working tooth width: not less than 0.05mm
Paint film cross-cutting method:
★ Test strips must be prepared in accordance with ISOR1514 and ISO2808:
★ Place the test piece on a plate with sufficient hardness:
★ According to the thickness of the film to be tested, select the multi-blade cutting knife with the appropriate specifications.
After loosening one turn and moving the cutter body 3 or the threaded shaft 1, the multi-blade cutter can be changed, and then the lock member 2 can be used:
★ Handle the cross-cutting handle so that the multi-blade cutter is perpendicular to the test plane:
★ With uniform pressure, smooth non-fibrillation and cutting speed of 20~~50mm/s;
★ Rotate the test piece at a 90-degree angle and repeat the above operation on the cut slit to form a lattice pattern;
★ Using a soft brush along the pattern of the grid, the two diagonal lines are gently turned back five times and the brush is tested five times;
★ The test is done at least at three different locations on the test piece. If the experimental results at the three locations are different, the test should be repeated at more than three locations and all results recorded.
★六面：1mm 25格、1mm 100格、1.5mm 100格、2mm 25格（塑料手柄）
★四面：2mm 100格、3mm 25格（木手柄）
★单面：1mm 100格、2mm 100格（木手柄）另配备用刀片1片
QFH paint film cross-cutting work surface number:
★ Six sides: 1mm 25 grids, 1mm 100 grids, 1.5mm 100 grids, 2mm 25 grids (plastic handles)
★ four sides: 2mm 100 grid, 3mm 25 grid (wooden handle)
★Single side: 1mm 100 grid, 2mm 100 grid (wooden handle), 1 blade
QFH paint film cross-cutting notes:
★ All cuts should penetrate the coating, but the cut into the substrate should not be too deep;
★ If the coating is too thick and too hard to penetrate the substrate, the test is invalid and should be stated in the test report;
★ It must be measured with tape in special cases or when there are special requirements. The tape is typically a 25 mm wide translucent tape with a polyester film or acetate. Apply the tape to the entire cross-hatch and then tear it off at a small angle. The result can be obtained by the ratio of the surface of the paint film to the area of the peeled off:
★ The experiment should be carried out at a temperature of 23 ± 2 ° C and a relative humidity of 50 ± 5%.