Plastic laser welding technology is gradually replacing UV glue welding

Laser equipment has been developing, from the popular UV strong glue in the past to the new popular plastic laser welding, special industrial chillers have been providing reliable temperature control solutions for the laser processing and manufacturing industry. Better mechanical equipment also makes social development stronger and stronger.

With the rapid development of diagnosis and treatment technology, people have higher and higher regulations on medical device products. Since the overall specifications of most medical device products are small, in order to be more powerful and safer to be applied to the sales market, they can only be maintained according to bonding or welding methods.

Ultraviolet strong glue is generally used for bonding and sealing medical machinery. This kind of medical machinery must have high quality and best credibility, such as injection needles, infusion tubes, electronic endoscopes, breathing tubes, etc. But there is no doubt that medical UV glue is an adhesive that must be directly cured according to ultraviolet rays, so it brings a lot of trouble to the company during the manufacturing process.

Troubles with using adhesives:

1. Strong glue has a strong odor and is difficult to recruit workers for manufacturing;

2. Organic solvents and fillers are not low-cost, and adhesives are expensive;

3. Ultraviolet rays have poor penetration into some plastics or transparent materials, and there is a curing depth, which limits the geometric shape of the cured product. Opaque positions and blind spots of direct ultraviolet rays are not easy to cure.

At present, the emergence of plastic laser welding just fills the shortcomings of this industry. Plastic laser welding is increasingly widely used in various industries of medical machinery with its advantages of partial heating, precision machining, and non-contact heating. Laser welding is a welding process that uses a particle beam with high efficiency energy relative density as a heat source, that is, the laser radiation source heats the surface of the steel part, and the surface heat diffuses inward and outward according to heat conduction, so that the steel part melts and produces a special dissolution pool. As shown in the figure, the particle beam is absorbed by the next layer of material according to the top layer of light-transmitting material, and the laser kinetic energy is converted into energy after being absorbed. Because the two layers of materials are pressed together, the energy is transferred from the absorption layer to the light-transmitting layer, promoting the melting and fusion of the two layers of materials.

With the gradual improvement of plastic laser welding, the plastic laser welding process has gradually replaced traditional medical adhesives.

Plastic laser welding can not only save the curing time of UV glue and greatly improve productivity, but also plastic laser welding does not have any consumables, and the laser service life is 2000-8000 hours, saving the company the cost of adhesives.