With the development of new material processing technology, plastic products are widely used in aviation, shipbuilding, automobiles, medical equipment, food packaging, daily chemicals and other fields due to their light weight, corrosion resistance, good insulation and excellent molding and processing performance. Medical equipment and food packaging industries have extremely high requirements for welding efficiency and quality, requiring green environmental protection, good water tightness and air tightness, and sterility and dust-free... Transparent plastic laser welding machines perfectly meet the needs and are leading the new market for transparent plastic laser welding applications.
As we all know, the average efficiency of plastic laser welding is 2~3 times higher than that of traditional welding process, which has very obvious process advantages. The absorption rate of 1710nm wavelength laser in transparent/white plastic is several to 10 times higher than that of laser with shorter wavelength, which can perfectly weld transparent plastic components together, making it more flexible to use and more beautiful to weld. For example, brandnew 1710nm semiconductor laser only takes a dozen seconds to complete a complex plastic welding process.
Transparent/white plastic has a strong absorption rate for 1710nm laser. From the figure below, we can analyze that the absorption rate of transparent plastic for 1710nm laser is better than that of 2μm fiber laser. In addition, the output optical power of 1710nm laser does not need to be at least 100W like 808nm and 980nm. Generally, only tens of watts of optical power can meet most applications. Reduced power means lower cost, smaller size and greater practicality of laser.
The 1710nm direct semiconductor laser solution can save up to 10 times more energy than solid-state lasers or CO2 lasers, and save 30% more energy than fiber lasers.
The laser wavelength of a semiconductor laser is determined by the compound semiconductor material it uses. Brandnew has always focused on the research and development and production of semiconductors in the two major material systems of gallium arsenide and indium phosphide, with leading domestic and international technology levels. The wavelength of semiconductor lasers made of indium phosphide materials can cover the 900-2000nm band. Based on the market demand for transparent/white material welding, Brandnew actively develops 1710nm semiconductor lasers based on indium phosphide materials and has successfully developed 1710nm high-power semiconductor laser diode single-tube chips.
Based on the 1710nm high-power semiconductor laser diode single-tube chip, Brandnew successfully developed a 50W fiber-coupled module with an output fiber of 400μm/NA0.22.
The above figures are the LIV curve of the fiber-coupled module under 25℃ test conditions, the spectrum under 18A current, and the aging power change curve under 19A current. The aging time has exceeded 6000 hours. It can be seen from the aging power change curve that the module output power has not dropped significantly, and it has high reliability.
Plastic laser welding technology is a revolutionary green and environmentally friendly near-net-shape forming technology with extremely broad development and application prospects.
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