Veneer decoration is a very important process in the production of panel furniture. It is used to decorate the furniture surface with veneer materials, to cover the defects of the material surface, improve the surface wear resistance, heat resistance, water resistance and corrosion resistance of the substrate, and at the same time improve And improve the strength and dimensional stability of the material. However, due to the different production methods of various enterprises, there are often some quality problems in the process of veneer decoration and use. Today, the top ten brands of China's top ten brands will propose corresponding solutions in this article.  1. Quality requirements for veneer decoration Thin wood and other materials veneers are not allowed to have degumming, bubbling and obvious penetration. The veneer should be tight and flat, and the texture should be similar. There should be no depressions, pitting, cracks, scratches, or collapses. Corners and cutting edges, etc. In the national standards, the requirements for the veneer of furniture: enterprises should organize production in strict accordance with the requirements of national standards, usually the internal standards of enterprises are stricter than national standards. 2, veneer processing technology Before the veneer material is applied, the plain plate is subjected to thick sanding or surface sanding to make the thickness and surface roughness meet the veneer quality requirements; single-sided or double-sided coating is applied on the surface of the sanded plain plate; Then, the decorative material is laid on the surface of the glue coating, and the pressure is solidified on the cold press or the hot press, so that the facing material and the substrate are tightly adhered together; then the trimmed sheet is trimmed and finished. The veneer work.  3. Analysis of main problems and causes in veneer production Substrate: The smoothness of the surface of the substrate, the bonding strength of the inner surface, and the uniformity of the thickness all affect the quality of the veneer. Surface quality of the substrate: The wood-based panel substrate used for panel furniture, the appearance quality, physical and chemical properties must comply with national standards. The surface of the substrate often has small areas of rubber spots, paraffin spots, oil stains and other impurities, which affect the penetration of the adhesive, so that the material can not be well glued, and there are problems such as degumming and bubbling. Substrate thickness deviation: The national standard of artificial board specifies that the thickness deviation is within ±0.2mm. If the thickness deviation exceeds the national standard, this will produce a variety of quality problems for thinner facing materials. Finishing material: the impregnated paper will cause white spots when it is too dry; the uneven thickness of the impregnated paper will cause discoloration, the thickness of the thin wood will be too thin, the structural structure will cause the conduit to be too large, and the moisture content will be too high, which will result in the surface of the adhesive, and the moisture content of the thin wood. It will cause black glue seams, seams or lap joints at the seams of the thin wood; sometimes the entire board surface will be warped and deformed. If the thickness of the veneer is too thin, the surface of the veneer will pass through. Moisture content of decorative materials: Moisture content is one of the important factors affecting the quality of veneer. It affects the viscosity of the adhesive used in the veneer, affects the wettability of the adhesive, and affects the apparent physical properties of the decorative material. Decorative material thickness: Thin wood usually has a thickness ranging from 0.3mm to 1.5mm. When the surface of the substrate is flat, the thickness of the thin wood can be smaller; when the surface is uneven, the thickness is large. Generally, the thickness of the thin wood used in the furniture company ranges from 0.4mm to 0.6mm, which can meet the requirements of the veneer process and meet the decorative requirements of the solid wood. The thickness of the thin wood is too thin. If the pipe is large, it will cause the rubber to penetrate the bottom. Color and other phenomena. The decorative paper used should also have a certain thickness, otherwise it will appear through the bottom. If the thickness is uneven, discoloration will occur. Veneering process: The veneering process includes the process method in the veneer, standardized operation, processing conditions, etc., which is the key link to ensure the quality of the veneer. Process method: Thick sanding of plain plates is an important process to ensure uniform thickness of the plates and improve the quality of the plates. Failure to operate or reduce this process will cause veneer defects, which cannot be remedied in later processes. . The gluing process is to uniformly apply a certain amount of glue to the surface of the substrate. Too much glue will make the rubber layer hard and brittle; if the amount of glue is too small or the glue is uneven, local glue will be produced, resulting in bubbling; when the blank is used, the surface of the back surface of the adhesive should be symmetrical, otherwise it will cause the base. The surface of the material is unevenly stressed, causing the sheet to warp. Processing conditions: Ensure good processing conditions during the veneering process, such as clean environment, suitable humidity and temperature and pressure. Before the glue is applied, the surface of the board should be cleaned. After the glue is applied, the dust particles should be prevented from falling on the board surface. Otherwise, the surface of the board will have granular protrusions. Standardized operation: The veneer processing should be carried out in strict accordance with the process standards. Especially in the process of coating the substrate, the adhesive is first prepared in a certain proportion, stirred evenly, and then added to the glue applicator by a special container. In the actual operation, the worker will directly add the main agent of the adhesive to the rubber roller, and then add a modified material such as lignin powder to stir on the glue coating machine. This will occur, on the one hand, the adhesive is not evenly stirred, and large particles appear; on the other hand, the glue applicator is damaged; after the glue is applied, there are defects such as partial lack of glue and granules.  4. Measures and methods for resolving veneer quality Treatment of glue or crack: When the surface of the decorative surface is transparent or cracked, increase the thickness of the thin wood or cushion a layer of paper between the thin wood and the substrate, and the moisture content of the thin wood should not be too high. In addition, the hot pressing temperature and pressure are appropriately reduced. After the hot pressing, the plates are stacked facing the surface to reduce evaporation of water. Adjust the viscosity of the adhesive and the amount of glue applied, and appropriately increase the ratio of solid content of the adhesive. Treatment of surface grease or stains and base color: When the surface of the decoration is contaminated with oil, grease or wax, it can be dissolved and dissolved by organic solvent. Common solvents are alcohol, ether, benzene and acetone. Scrub first with weakly alkaline 1 sodium hydroxide or sodium bicarbonate, then wipe with water. Most of the stains on the surface are contaminated with tannins, pigments and iron ions in the wood, which can be erased with hydrogen peroxide or 5 oxalic acid. When the surface of the board is transparent, apply a thinner piece of wood or a piece of paper of the same color as the thin wood to the substrate, and then affix the thin wood. In addition, the substrate is colored, and then the wood method is applied to color the substrate, and the substrate is directly colored by a coating method, or a small amount of a coloring agent is added to the adhesive, and the coloring is performed while the glue is applied. Bubbling and degumming in a small area: the degumming or bubbling should be deflated first, and then glued. Use a sharp cutter to cut the bubbling wood in the direction of the wood grain to deflate, and use a thick syringe to inject the super glue into the bubbling, and then flatten it with an iron. For slightly larger bubbling, use a sharp blade to cut the thin wood at the bubbling direction and scrape the residual glue. Select the nearest thin wood to trim the desired size, and re-stick with the super glue, but note that The edge of the thin wood is also cut into a bevel to ensure that the repaired veneer is in contact with the original veneer slope, leaving no seam marks and a smooth surface. Large-area bubbling and degumming treatment: When large-area bubbling and degumming occur, and the number of workpieces is large, only the means of repair can not solve the problem fundamentally. It is necessary to check the reasons, analyze and discuss, and find corresponding measures. The surface of the sticker is uneven: in severe cases, the thin wood can be shaved to trim the surface of the part. The main reason is that the thickness deviation of the substrate is large, and the thickness deviation is reduced by the original sanding, and the curve is stable, which can basically meet the requirements of the veneer process. In addition, the surface of the plain wood-based panel has a high wax content, which will hinder the infiltration of the glue and reduce the bonding strength. ———————————— Top Ten Brands in China | Plate Joining | Top Ten Brands | Plate Brands | Sheets | Top 10 Brands of China | Eco-board |Shandong plate | Eco-board top ten brands | Plate investment | Plate agent | Environmental plate | Health plate | China Top Brand plate | plate 10 big brand-name goods | Chinese brand-name plate 10 Know how to love yourself Create a trend home for people who love home If you want to be environmentally friendly, choose a hundred treasures. 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