Wood coating raw material composition, design requirements and coating procedures

China Coatings Online News Information: although there are many types of wood coatings, but the basic composition is mainly the following four:1, coating resin
coating resin is the most important component to determine all chemical properties and uses of coatings, such as NC construction and adhesion is good; 2, the volatile component of the coating solvent
coating is the solvent, its main function is to control and adjust the viscosity of the coating, so that the coating can be easily coated on the wood surface, and make it flow flat and form a flat coating film. Because solvents each have their own special solubility and evaporation speed, so the paint solvent is difficult to form a pure solvent, generally using a variety of solvent characteristics, according to the appropriate proportion of mixed.
3, pigments
in addition of pigments to transparent coatings
i.e. become (semi)transparent coatings, pigments are mainly used to give coatings rich color and enhance their protective functions.
4, body
materials to meet the needs of the application, in the paint to add zinc hard esterate, silica, flat wax... Wait a minute.5, additives
additives are additives used to control coating qualities to assist in the formation of excellent coating film. Adders include, desiccants, dispersants, mold inhibitors... Wait a minute.How to choose suitable wood coating
The nature of wood materials is completely different from other materials, so coatings suitable for other materials are not necessarily suitable for coating on wood materials, according to the nature of the wood itself and the effect requirements after coating, you can understand that good wood coating should have the following characteristics:1, coating Membrane needs to have good flexibility (scalability)
because wood by the environment temperature, humidity changes will produce unetrial shrink expansion, because the coating must have good flexibility (scalability), coating film to withstand the wood's homogeneous contraction expansion changes, otherwise the coating film will produce cracking, deformation and peeling and other shortcomings. 2, the coating film should have good adhesion to wood
wood is a hydro-friendly material, so the coating should also have a high degree of hydro-hydro, wetting and moderate permeability, in order to form a good attachment with wood. 3, the coating film needs to have good hardness and toughness
wood products surface is often subject to external friction and collision, so the coating film needs to have a fairly good hardness and toughness to prevent the formation of dents.4, the coating film should have good transparent performance to fully show the characteristics of wood
wood has a special texture and color. Therefore, the coating should be good transparency, in order to show and even emphasize the characteristics of wood, increase the user's visual perception. 5, the coating film needs to be water-resistant
However, this point and the above-mentioned coatings should have hydro-hydroffin just conflict, so it is necessary to reconciliate its properties, so that the coating has hydro-hydropicrality, and the formation of coating film has a moderate water resistance.6, the coating film can be dried at room temperature
high temperature, wood will produce shrinkage, bending, deformation and other shortcomings. Therefore, wood coatings
can be dried at high temperatures, preferably at room temperature, in order to produce good quality wood products.
7, coating film is not toxic
because wood furniture in the daily life of the public frequent contact, so the product after coating must be non-toxic, otherwise it will be harmful to human health."Wood coating design key"
engaged in the design of a wood coating project, before design should carefully consider the following points:
1, first recognize the use of the product (coated)?
2, decide to use wood material, features?
3, wood moisture content? Will you spit oil? Do you want to tie the oil with a
primer? Is the primary color uniform? Do you want to unify the base color?
5, the depth of the material capillary hole? Do you want to use earth pulp?
6, tone (specified color) dark or light? Do you want colorants to match coloring?
7.The clarity of the texture requirements? Three - dimensional? Do you want to apply NC head primer first? Or colorants with fillers? Is it transparent? Translucent? Or a shade of color?
8, coating film thickness? Are pores required to be open? (What's full?) How many times do second-degree primers have to be sprayed) or closed? Is it a highlight? Or flat light (a few points)? Do you want to light up?
9, the characteristics of the coating film requirements (especially the paint)? Paint selection?(Wood coating procedure (adjusted as needed)
1, white rough sanding (material adjustment)
2, bleaching (Bleaching)
3, putty
4, coloring (Stain)
5, wood sealer: can be sprayed after colorant, or sprayed on the white body better.
6, Sanding: grinding off the cerum hair, so that the coating is easy to enter the capillary, so as not to have the defect of blowing bubbles or deepening the depth of the capillary hole.
7, Filler.
8, medium coat: Sanding primer. Adjust the number of sprays according to the physical requirements.
9, grinding: absolutely thorough, otherwise it affects tightness and flatness.
10, top coat: transparent light;