Paint as a post-process of the wooden door processing, its advantages and disadvantages directly affect the final use effect. Because of the variety of wood lacquers, consumers are not very knowledgeable. Nowadays, the paint used in the wooden doors on the market is particularly "feeling", and consumers are "fudged" by accident.
The paint coating process of the wooden door is the last production process in the wooden door manufacturing process, and is also a very important process in the wooden door process. The level of the coating process can largely reflect the manufacturing level and competitiveness of a wooden door enterprise. The painting process of the wooden door is also the most technical operation in the whole wooden door manufacturing process. I often hear the sighs of the wooden door business owners: doing wooden doors, woodworking does not have to bother, it is the most headache.
When it comes to the painting of wooden doors, the core is: painting application technology and painting management. The application technology of wooden door painting is divided into three parts: coating selection, coating process design, coating equipment application coatings are mainly divided into PU paint coating (polyurethane paint), PE paint coating (unsaturated resin paint), UV paint. Five kinds of coatings (UV curing paint), NC paint coating (nitrocellulose paint), W paint coating (water paint).
In the wood door painting, the above five coatings are commonly used. They have different shares in different periods and different types of enterprises.
First, PU paint coating: PU paint is the most commonly used paint variety in domestic enterprises. It has good comprehensive performance, such as: construction performance, filling, fullness, hardness, grinding, scratch resistance, etc. have a good performance.
Second, PE paint coating: PE paint is the most commonly used PE primer. It is divided into a clear primer and a colored primer (primarily a white primer). PE primer is a kind of paint with high solid content. It has high hardness, strong anti-sag property and high fullness, but its construction performance is more complicated and brittle. PE topcoats are only bright products and have no matte finish, so the use of PE topcoats on wooden door finishes is rare.
Third, UV paint coating: UV coating is currently recognized as one of the two most environmentally friendly coatings in the world (the other is water-based paint). As a new paint, it has developed rapidly in recent years, especially in the Pearl River Delta region, the Yangtze River Delta region, furniture factories, wooden door factories, wood flooring factories are used very much, this is a very new expansion Coatings; the processes, equipment and technologies associated with this are becoming more and more mature.
Among all wooden door manufacturers, the first to use UV coatings is mainly concentrated in Hong Kong-owned enterprises in the Pearl River Delta region. They originally used transparent UV and UV surfaces to make transparent or transparent colored wooden door products. With the common development of UV coating technology and equipment technology, the construction technology of solid color UV products is also mature. At present, many companies in the Pearl River Delta region have used UV coatings to produce solid color wooden doors.
In addition to environmental protection, UV coatings are also excellent in coating performance, with good hardness and chemical resistance. High efficiency and low cost are also key factors for the widespread use of UV coatings. Its efficiency is dozens of times the general coating efficiency, and the cost of the paint used is one-third to two-thirds of the general paint. If you count the labor costs, the cost savings will be even more impressive.
However, UV coating also has its limitations. It can only be applied to the flat door of the wooden door by roller coating. In addition, UV coating has a relatively large investment in equipment. In the early days, the price of a complete UV coating line imported from abroad was as high as 15 million yuan. At present, many joint ventures and foreign-funded enterprises in China are producing similar equipment production lines, ranging in price from several hundred thousand yuan to several million yuan.
Fourth, NC paint coating: NC paint is a very old paint, and it is also a widely used variety. Its main applications on wooden doors are: transparent lacquer, colored lacquer (white, beige). Nitrocellulose varnish has good construction performance and shorter coating process time. Transparent nitrocellulose lacquers are commonly used in "open" and "semi-open" coatings and have excellent performance. The solid color lacquer is mostly used in the full-closed coating effect.
V. W paint: Most of the decoration is made of water-based paint. W coatings are relatively rare on furniture and wooden doors, but there are also some companies that use them to meet specific foreign customer requirements.
Water-based paints have relatively low solid content, thin paint film, low hardness, poor water resistance and high cost. However, with the continuous development of coating technology, these limitations are gradually being solved.
Summary: What type of coatings should be selected for wooden doors, and reasonable selection according to the positioning of each product and the requirements for the surface effects of the products. A reasonable selection can achieve the desired results, save labor and materials. On the contrary, it pays a high price but can't do what it wants. For example, customers require wooden doors to have a good fullness, and manufacturers use NC coatings for the coating process, even if they spend twice as much time and twice as much material as they can. Conversely, if the customer wants a fully open coating effect, then NC coating is an excellent choice. [ Follow the WeChat public account "Jiuzhengmen Window Network"; pay attention to courtesy, scan code to send millions of business opportunities ]
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