With the rapid development of the panel furniture industry, there are more and more families using wood-based panels to make customized furniture, and the price of eco-boards on the market is high or low. The price of wood-based panels depends on the raw materials used (such as cores). , facing paper, adhesives, rubber sheets), also has a great relationship with the veneer technology used.
Generally, the common processing technology for melamine overlay paper is the hot pressing process. However, it should be noted that when the hot pressing process is performed, three processing elements will affect its final effect. These three factors are the time of hot pressing, the hot pressing temperature and the appropriate pressure.
Three elements of veneer hot pressing process
Hot pressing time: its length depends on the curing speed and hot pressing temperature of the melamine resin, and it is generally 40 to 50 s. If the time is too long, the resin will be cured too much, and the elasticity should be lost. It is easy to cause cracks or internal stress to the product, causing cracks and warpage in the subsequent processing. When the time is too short, the resin is not solidified, and it is easy to produce a sticking phenomenon, which affects the physical and chemical properties of the surface of the product and affects the durability of the product.
Hot pressing temperature: mainly catalyzes the chemical reaction of melamine resin, that is, accelerates curing. According to the actual requirements of the production and the author's experience, the hot plate temperature is suitable at 145-165 °C. The high temperature helps to release the mold after pressing, and can shorten the hot pressing time and increase the yield. However, the excessive temperature makes the resin less than uniform flow and solidifies, resulting in tiny pores on the surface.
Appropriate pressure: It can ensure a good combination between the substrate and the melamine paper. Under suitable temperature and pressure, the resin in the melamine paper melts and solidifies to form a closed and dense surface, and also can make the surface of the substrate Unsatisfactorily calming tiny pores to fill. However, the pressure is generally 2.0-3.0 MPa. Under the premise of not affecting the product quality, low pressure should be used as much as possible, which is beneficial to the service life of the equipment and hydraulic oil and the internal structure of the substrate. However, too low a pressure affects the bond strength of the substrate to the melamine paper and the resin flowability.
In addition, boost technology is an important factor affecting the machine cycle and product production efficiency of the entire equipment production line. According to the empirical data of the veneer technology in the same industry abroad, the time for the hot pressing of the sheet is extended by about 1 s for every 0.1 s of the boosting time.
The following is a comparison of Sophia veneer and technical indicators of similar products at home and abroad, refer to it!
Melamine paper veneer PK veneer veneer
The veneer surface of the panel furniture is more and more realistic, with a variety of styles and fashionable styles. As far as the current market is concerned, the veneer of panel furniture mainly consists of six materials such as sticker skin, veneer, baking varnish, crystal plate, fireproof board and molded board. Take the melamine paper veneer as an example, let's take a look at its advantages!
Melamine paper veneer
Advantages: The index of the people is extremely high and the price is quite affordable. Its color pattern is rich, and it is immersed in the air without volatility in the melamine resin solution, which makes the furniture sheet not easy to be deformed, and has good corrosion resistance and wear resistance.
Disadvantages: the edge banding is easy to degumming, and the surface is only a flat shape can not make the bump effect.
Appropriate object: The simple style of the aesthetics is not required for the aesthetics.
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