Coating technology: Cupping test of paints and varnishes

It is suggested that the cupping test of paints and varnishes is to evaluate the anti cracking or anti separation performance of paint film from metal substrate after it is gradually deformed under standard conditions Initially, cupping test is mainly used to determine the strength and deformation performance of metal plate If there is a crack in stamping, its pressing depth is the strength of metal plate To test the film on the metal substrate is actually to measure its strength, elasticity and adhesion to the metal when the substrate is extended This is an essential test item for those coatings that need to be post formed in coil coating industry and can making industry, such as coil coating, can coating, etc 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 cupping test of paints and varnishes is to evaluate the anti cracking or anti separation performance of paint film after it is gradually deformed under standard conditions Initially, cupping test is mainly used to determine the strength and deformation performance of metal plate If there is a crack in stamping, its pressing depth is the strength of metal plate To test the film on the metal substrate is actually to measure its strength, elasticity and adhesion to the metal when the substrate is extended This is an essential test item for the coatings that need to be post formed in coil coating industry and can making industry, such as coil coating, can coating, etc Inspection method of cupping test for paints and varnishes: Cupping test principle of cupping test for paints and varnishes: Cupping test is to use a ball punch at the head of the instrument to push the back of the paint test panel at a constant speed to observe whether the front paint film is cracked or peeled off from the substrate When the paint film is damaged, the minimum depth of punch pressing is cupping index, expressed in mm It differs from impact resistance in performance Cupping tester for paints and varnishes: steel plate: thickness 0.30-1.25mm, width and length, side length no less than 70mm operation points: firmly fix the test plate on the instrument, and the coating faces the film When the punch is at zero position, the top is in contact with the test plate Adjust the test plate so that the intersection of the center axis of the punch and the test plate is not less than 35mm from each side of the plate Turn on the instrument and push the punch towards the test plate at a constant speed until it reaches the specified depth or the coating cracks or separates from the substrate When the test is carried out according to the specified punching depth, when the specified depth is reached, take out the test plate, observe whether the coating cracks or separates from the base material, so as to pass or fail the evaluation; when the test is carried out according to the minimum depth of damage caused by the measurement, the result is represented by the minimum depth when the coating begins to crack or separates from the base material, and take two consistent results Note (1) before measurement, the punch should be at zero position (2) The thickness of the base material shall meet the requirements, otherwise, although the paint film is not damaged or fallen off during the test, the base material has cracked, which will lead to the test failure 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,