Coating technology: determination method of volume percentage of non-volatile matter in coating

Core tip: the volume content of non-volatile matter in paint, commonly known as the volume solid content of paint, refers to the percentage of the volume of non-volatile matter in the initial volume of paint obtained after the paint product is cured or dried at a specified uniform thickness at a specified temperature for a specified time At present, the commonly used methods to determine the volume percent content of non-volatile matter in coatings are as follows: 1 The simple way is to use: Determination of NVM (%), density ρ 1 (g / M 3) and density ρ 2 of main solvent components in coating products（ 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 Coating home news: the volume content of non-volatile matter in coating, commonly known as the volume solid content of coating, refers to the percentage of the volume of non-volatile matter in the initial volume of coating obtained after the coating product is cured or dried at a specified uniform thickness at a specified temperature for a specified time At present, there are several commonly used methods to determine the volume percent content of nonvolatile matter in paint: 1 Simple method: to determine the nonvolatile matter NV m (%) (baking method) and density ρ 1 (g / m3) of paint products and the density ρ 2 (g / m3) of main solvent components in paint products Through the calculation of formula (1) and (2), the dry film can be obtained respectively The theoretical density ρ (g / M? 3) and the percentage content of nonvolatile matter NV V (%) of coating products ρ = (ρ 1 × NV m) / (100- ⌊ (ρ 1/ ρ 2) ⌋ × (100-NV m)) (1) NV v= (ρ 1 × NV m) / ρ (2) 2 Film thickness measurement method: the paint film is prepared on a smooth and flat surface Under the condition that the film is completely flat and the film thickness is uniform, the nonvolatile volume content of the paint is NVv (%): NV v= dry film thickness / wet film thickness × 100, News and coating of diatom mud, paint coating, coating process, fire retardant coating, diatom mud, paint coating, coating process, decoration knowledge and decoration effect map of fire retardant coating,