The Effect of Sealing Primer on the Paint Finishing Process of Solid Wood Furniture

The sealer is made of a special resin that reacts with the resin and oil on the surface of the wood. It reacts to form a layer on the surface of the wood that prevents upward migration of unevaporated water and oil in the conduit. Film. Sealing primers require extremely strong penetrating power, drilling with holes, high viscosity, good filling properties, fast drying, and easy sanding. After sanding the solid wood furniture blanks, the first step is to apply a sealer finishing process before finishing the finish and top coat. Its main functions are:

1 Prevent paint film from collapsing defects, which are commonly called “eye slim” phenomenon. Wood is composed of numerous cells of different shapes, sizes, and arrangements. Wood cells have different rates of growth as the weather changes throughout the year, so that the cells surround the wood's medullary heart with a size, densely stacked arrangement. The cells are longitudinally sectioned on the transection plane and are in different lengths of grooves (cell cavities, cell walls forming grooves) arranged in parallel to form a strip of woodgrains; on the chord section, the cells are alternately stacked in dense color depth and loose color. Arranged to show beautiful patterns of peaks. This beautiful pattern must be used in the furniture paint finishing process and must be dealt with at the same time. If a groove with a beautiful pattern is not filled and filled in the process of painting, it will cause the paint film to collapse. This phenomenon is generally called "eye slimmer". At the same time, the amount of topcoat will increase,

The increase in furniture production costs.

2 Prevention of “spray” defects in paint films Wood cells usually contain resins, gums, tannins, pigments, volatile oils, and water. The most common resin is turpentine, which is composed of turpentine and rosin. Turpentine is a good solvent for various oil paints. When lacquer paints are applied directly on the surface of turpentine-containing wood, they are dissolved by turpentine and affect the drying of the coating. The tannin in wood is an organic tannin, soluble in water, and can react with metal salts such as chromium, manganese, iron, and lead to become colored organic salts, which can interfere with the coloring effect of paint. Volatile oils in wood can affect the cure of paint films. Many of the above factors cause paint film defects, which are often referred to as “spitting” phenomena. Therefore, the surface of the wood must be effectively sealed to ensure that the paint film has a long-term, effective protection and decorative effect on the surface of the wood.

3 to prevent the removal of wood cilia is not clean, and reduce the adhesion of paint film There are countless tiny wood cilia in the wood ducts, these wood cilia in furniture, blank sanding, sandpaper can not be completely removed, when coated When the paint is applied, the wood cilia will harden and protrude, reducing the adhesion of the paint film and making the wood texture unclear. The coating head is sealed off the primer, dried, and gently polished to remove the wood cilia, which greatly enhances the surface adhesion of the paint film.