Coating classification: test standard for waterborne coatings - Adhesion

Core tip: the adhesion of water-based wood paint should be measured on the wood substrate, and it is of no practical significance to measure the adhesion of wood paint by sample preparation on tinplate The test can be carried out according to the method specified in GB / T 9286-1998 cross cut test for paint film of paints and varnishes The thickness of the dry and flat board shall not be less than 10 m m The sample can be prepared by spraying and brushing In order to control the coating thickness, it is better to use the wire rod coater to prepare the sample, and the wet film thickness of the coating shall not exceed 120 μ M After the paint film is dried to the specified time, it shall be placed under the condition of controlled temperature and humidity for at least 16 h Paint knowledge | precautions for wall paint color selection Recommended introduction: when painting the wall, the owner sometimes has difficulty in choosing what color of the wall paint to paint In fact, there is no ugly color in the wall paint, only the disharmonious color matching The use of wall color contains the knowledge of health Too strong color will stimulate people's perception, make people have a sense of fidgety, affect people's mental health Grasp the basic principles of wall color and paint a colorful space 1、 Wall paint color selection notice 1 Light color is generally used for the top surface Light colors make people feel light, dark colors make people feel heavy Usually, the treatment of rooms is from top to bottom, from shallow to deep For example, the ceiling and walls of rooms are white and Paint Home News: the adhesion of water-based wood paint should be measured on the wood substrate It is of no practical significance to measure the adhesion of wood paint by making samples on tinplate The test can be carried out according to the method specified in GB / T 9286-1998 cross cut test for paint film of paints and varnishes The thickness of the dry and flat board shall not be less than 10 m m The sample can be prepared by spraying and brushing In order to control the coating thickness, it is better to use the wire rod coater to prepare the sample, and the wet film thickness of the coating shall not exceed 120 μ M After the paint film is dried to the specified time, it shall be placed under the condition of controlled temperature and humidity for at least 16 h before measurement The spacing between the cutting edges of the scriber is 2 mm, and the cutting is conducted along the direction of the wood grain at about 45 °, and then the second cutting is conducted at 90 ° of the first cutting direction, so that the cutting grain is a small square lattice The paint film must be cut through each cutting Clean with a soft brush and observe The cutting line is smooth and in good condition without falling off, which is level 0; there is a little coating falling off at the intersection of tangent lines, which is level 1 if the cross cutting area affected is not more than 5%; and level 2 if the area affected by coating falling off is 5% - 15% The material of wood has a great influence on the adhesion of paint The adhesion of paint on the smooth and dense wood surface is far better than that on porous wood The type of wood used should be indicated in the test Circle method and pull method are not suitable for the determination of adhesion of waterborne wood paint 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,