Coating process: coating adhesion test method

Core tips: 1 Test method: Cut 10 × 10 (100) 1mm × 1mm small grids on the surface of the test sample with a bagel knife, each of which shall be deep enough to the bottom layer of the paint; brush the fragments in the test area with a brush; firmly stick the small grid to be tested with 3m600 tape or equivalent tape, and wipe the tape with an eraser to increase the contact area and strength between the tape and the tested area; grasp the tape 1 by hand At the end, remove the adhesive tape in the vertical direction (90 °), and carry out the same test twice at the same position Two Paint knowledge how about Akzo Nobel Powder Coating Recommended introduction: powder coating is a kind of coating with different form from general coating, which is in powder form It is a new type of coating, because of its own advantages and more and more known by people Let's introduce Akzo Nobel Powder coating Akzo Nobel Powder coating is a cost-effective coating solution, which can be applied to different kinds of products After the treatment of static electricity and fire baking, a tough and durable coating surface will be formed, with the least impact on the environment Since the introduction of this technology, powder coating has been able to continue to maintain the Paint Home News: 1 Test method: use a hundred grid knife to draw 10 × 10 (100) 1mm × 1mm small grids on the surface of the test sample, each of which should be deep enough to paint The bottom layer of the test area; brush the fragments of the test area with a brush; firmly stick the small grid to be tested with 3m600 tape or equivalent tape, and wipe the tape with eraser to increase the contact area and strength between the tape and the tested area; grasp one end of the tape by hand, quickly pull off the tape in the vertical direction (90 °), and carry out the same test twice at the same position 2 Test conditions and standards: it is specified to use 3m600 or 610 adhesive tape to stick in Baige, and quickly pull up 3M adhesive tape, and the number of the top coat or electric degree layer glued by the adhesive tape shall be in accordance with the percentage of Baige: ISO grade: 0 = ASTM grade: 5b, the edge of the incision is completely smooth, and the edge of the lattice has no peeling ISO grade: 1 = ASTM grade: 4B there is small flake peeling at the intersection of cuts, and the actual damage in the delimited area is ≤ 5% ISO grade: 2 = ASTM grade: the edge and / or intersection of 3B notch has been peeled, and its area is more than 5% - 15% ISO grade: 3 = ASTM grade: 2B with partial peeling or full peeling along the edge of the incision, or partial lattice with full peeling The peeling area is more than 15% - 35% ISO grade: 4 = ASTM grade: 1b the edge of the incision is flaking / or some of the squares are partially or completely flaking, and the area is larger than 35% - 65% of the grid area ISO grade: 5 = ASTM grade: 0b there are pieces of paint falling off at the edge and intersection of the scribed line, and the total falling off area is greater than 65% According to the customer's requirements, whether the B-number test has passed the 100 grid test is required to be more than 4B by customers in the general mobile phone industry Use a Baige knife to cut 1 knife horizontally and longitudinally and form 100 small squares If there is no Baige knife, use an art knife Use a tape of 3m600 or 610 to stick it in Baige, quickly pull up 3M tape, and test the amount of falling off 3 Operation steps: ① use a scriber to cut a cross lattice pattern on the coating and cut it to the base material; ② brush it five times in the diagonal direction of the brush and stick it on the incision with adhesive tape and then pull it apart; ③ observe the situation of the lattice area with a magnifying glass ④ the adhesion of the cross cut results shall be in accordance with the standard grade of the second item 4 Relevant test tool product parameters: Baige tester (paint film scriber, paint film scriber) Product Description: designed and manufactured according to iso2409-1992 standard It is applicable to GB / t9286-98 and BS 3900 E6 / ASTM d3359 Features: it is used to draw a certain size of grid evenly, and evaluate the adhesion degree of the coating to the substrate by evaluating the integrity of the coating in the grid, expressed as "grade" It is mainly used for the determination of the adhesion of the organic paint by the cross cut method It is not only suitable for the laboratory, but also for the construction site under various conditions Application: the instrument is mainly suitable for the determination of the adhesion of organic coatings by the cross cut method It is not only suitable for the laboratory, but also for the construction site under various conditions Working principle and scope of application: with a certain specification of tools, the coating is cut and penetrated by lattice pattern, and the finished pattern is classified according to six levels to evaluate the resistance of coating separation from substrate Technical index: the distance between multi edge cutters is 1 ± 0.01mm and 2 ± 0.01mm respectively The straightness of the tooth top of the multi edge cutting cutter is ＜ 0.003mm ＜ 0.006mm respectively Width of working tooth tip of multi edge cutter: ＞ 0.05mm Distance between cutter teeth: 1mm / 2mm / 3mm film thickness: 60um / 120um / 120um 5 Operation and use method: the test piece must be prepared according to iso1514 and iso2808 Place the test piece on a plate with enough hardness Hold the scriber handle so that the multi blade cutter is perpendicular to the plane of the test piece Cut with uniform pressure, balanced non vibrating technique and cutting speed of 20-50mm / s Rotate the scale 90 ° and repeat the above operations on the cut to form a lattice pattern Use a soft brush to measure the two diagonals of the lattice pattern and brush the test piece gently backward 5 times and forward 5 times The test shall be completed at least at three different positions of the test piece If the test results at three different positions are different, the test shall be repeated at more than three positions, and all the results shall be recorded at the same time If it is necessary to replace the multi blade cutter, use a screwdriver to loosen the two screws on the cutter body, replace the cutter used, stick the blade part to the side of the handle, and tighten the screws 6 Note: ① all cuts shall penetrate the coating, but the cut in base material shall not be too deep ② if the coating is too thick and hard to penetrate the base material, the test is invalid, but shall be described in the test report ③ in case of special circumstances or special requirements, the tape method shall be used The tape is generally a 25 mm wide translucent tape, with the backing material of polyester film or acetate fiber Stick the tape on the whole grid and tear it off at the minimum angle The result can be obtained according to the proportion of the glued area on the surface of the paint film ④ the test shall be conducted at 23 ± 2 ℃ and 50 ± 5% relative humidity Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,