Anti-counterfeiting! Application of 355nm UV Laser in Carbon Fiber Badminton Racket Marking

Carbon fiber material is a kind of special fiber with excellent mechanics and fine functions, and is widely used in many fields. Studies have shown that carbon fiber materials have a series of advantages such as high specific modulus and high specific modulus, light density, small thermal expansion coefficient, good damping performance, fatigue resistance, and large design freedom, and are especially suitable for sports equipment.

Carbon fiber materials are widely used in badminton rackets, so carbon fiber badminton rackets are very light in weight and strong in rigidity. This is especially true for high-end badminton rackets. In addition to the use of higher-strength carbon fiber materials, factors such as the racket’s shape and balance point are also comprehensively considered to help athletes absorb more vibration and shock during hitting, and give full play to technical, tactical and personal ability and achieve excellent results.

uv laser | green laser | Ultraviolet lasers | uv dpss laser | nanosecond laser | UV laser source | Solid State Lasers

Therefore, professional, high-end badminton rackets are often sold at very high prices, bringing very objective profits to manufacturers. In order to prevent counterfeit products from infringing on the brand image, badminton racket manufacturers need to do enough anti-counterfeiting homework when the badminton racket leaves the factory. The common practice is to paste anti-counterfeiting signs and engrave a unique steel stamp number on the racket shaft and cone cover, just like an ID card. In the same way, it is unique, representing the origin, production batch and other information. You can basically identify the authenticity of the racket just by looking at the writing of the numbers on the stamp number.

Laser marking has become a "mass market application", and the non-contact, permanent marking it brings can bring a reliable anti-counterfeiting solution for carbon fiber badminton rackets. According to the characteristics of carbon fiber and the requirements of anti-counterfeiting, RFH 355nm UV nanosecond solid-state laser can provide stable and fine marking effect.

First, the 355nm material of the short-wave factory has high absorption rate, and has a smaller thermal effect compared with green light and infrared light, and the single-photon energy of ultraviolet light is high, which is 3.49eV, which is higher than the bond energy of C-C bond under normal conditions (3.45eV). ), which can directly destroy the chemical bonds of carbon fiber materials, so it can bring very good cold working effect.

The second is the pulse width of less than 25ns. The laser beam with high energy density acts on the surface of the carbon fiber, and the heat is over before it can diffuse, which shows that the heat-affected zone is very small.

Third, laser marking does not produce mechanical extrusion or mechanical stress, and it is non-contact processing, so it will not be pressed to the surface of carbon fiber, so it will not be deformed, and the marking process will not yellow or burn.

Fourth, the beam quality is excellent and stable (M2<1.2), coupled with the natural easy-to-focus characteristics of 355nm ultraviolet light, the diameter of the focused spot can reach less than 20um, so that it can also be engraved in a very narrow rod area. All kinds of text, symbols and pattern information, the character size can be from millimeters to micrometers, which also has special significance for the anti-counterfeiting of products.

Therefore, the laser marking process can complete some modern processes that cannot be achieved by conventional methods, and is an ideal improvement plan for the traditional steel engraving process.