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HPL
Keywords: plywood
As a traditional material, wood is widely used in all aspects of life. However, due to its limitations, such as waterproof, insect-proof, and size, users hope to expand the availability and application range of wood through artificial means, so composite board arises at the historic moment. The invention of composite board, can even go back to 3000 BC, as early as the beginning of the 1st century BC, the Romans have been familiar with veneer manufacturing technology, and plywood manufacturing principle. The French invented the veneer saw in 1812. In 1834, France issued a patent for the planer cutting machine. The development of materials, along with the pace of human progress and the development of wooden composite panels, enables navigators from all over the world to cross oceans and explore the unknown and the world in a further place. Electricity came into production in the 1870s; In the 1880s, the internal combustion engine was successfully developed. In 1855, Benz successfully produced a test car; The trial production of the 1903 aircraft was successful. With the progress of science and technology, the traditional wood composite board has been unable to meet the needs of the development of science and technology at that time, people are in urgent need of a new type of material, can keep up with the rapid progress of science and technology. So, a lot of scientists started to work on it. In 1896, a Belgian-born American chemist named Leo Baekeland mixed phenol and formaldehyde to produce a resin product that could be converted into an insoluble polymer, phenolic resin. And, by adding some sawdust filler, he got a very dark plastic material. In 1907, he applied for and patented the name Bakelite after his surname, which is the precursor of today's high-pressure laminated decorative plate HPL. HPL sheet? What kind of board is it? This material has excellent performance, different from the traditional composite board, and has the insulation, so, soon won the favor of the electronic industry, successfully replaced the ceramic and mica to become the best insulation material in electronic equipment. Since then, HPL has been used in many other fields, from sound, electricity, and heat isolation, to agriculture; From textiles to airlines. However, the use of phenol-formaldehyde polymers was limited due to their poor light resistance, and early HPL laminates could only be black or brown. In 1906, Leibich focused his research on melamine and formaldehyde. He found that after mixing these melamine and formaldehyde resins with cellulose and polymerization reaction, a kind of solid material with very good performance was generated, which was stable to light, anti-wear and non-conductive. By the 1940s, can be well applied to the development of melamine formaldehyde decorative paper material technology, so that the appearance of beautification has become possible. He can give the board a more pleasing, more decorative surface. Finally, in the 1950s, based on previous research by scientists, the modern HPL material was first commercially produced in the United States. This material is very revolutionary, it is different from traditional composite panels, and some other materials. Its plasticity and insulation, so that it has a wider range of applications; Corrosion resistance, and let it have a longer service life and; The outermost layer of decoration, removing paint, spray paint, wood plywood wallpaper and other additional decoration and processing. This new material has been a great success because of its aesthetic and functional advantages. It was first a great success in kitchen furniture, especially in the stereotypical "American" kitchen, where tables, shelves, bar counters, and all sorts of places that were once wood and wood-clad panels were replaced by it. In the decades that followed, research, innovation and development of the new HPL opened the door to a wide range of products in different market segments and more obscure potential applications. From the smoke-proof HPL of the 1960s to a self-supporting HPL; From laminated panels to prevent the spread of fire, to the types of materials developed later for use in the furniture industry; They range from compacted varieties to varieties mixed with various materials. Scientists have turned their imagination into reality, and the application and research of the HPL will continue. |
