Focusing on High-Purity Gases for Minneapolis Laser Welding


Lasers were originally advanced by none other than Albert Einstein in the early days of the 20th century. It wasn’t until the 1980s, though, that lasers were applied to solder lead in electronic component circuit boards. And it wasn’t until 2002 that CO2 lasers were employed to weld polymers. Nowadays, Toll Company, one of over 150 PurityPlus® Partners at 600 locations nationwide, is thrilled to be a trusted Minneapolis producer of the high-purity specialty gases so necessary to the gas laser welding process. Our main customers are considerably automated high-volume manufacturers. Those associated with the automotive industry are likely the most conspicuous cases in point.

A few gas laser factoids:

  • Resonator gases are commonly an admixture of helium (He), carbon dioxide (CO2), and nitrogen (N2). The active gas that as a matter of fact initiates the laser light itself – infrared radiation – is CO2.
  • Shielding gases keep the weld area free of oxygen and water vapor, which helps hike the speed and quality of the welding process. Argon is the most common shielding gas. It tends to be mixed with helium, oxygen, or carbon dioxide, which significantly raises its plasma suppression properties.
  • As a resonator gas, ultra-high-purity (99.999%) PurityPlus® helium provides extremely high thermal conductivity, the better to conduct heat away from the electric discharge. This makes it ideal for very high-powered laser welding.
  • PurityPlus® carbon dioxide, while often used alone to operate CO2 lasers, is better intermixed with helium and nitrogen so as to achieve the very high laser powers needed for laser cutting and welding.
  • PurityPlus® nitrogen, particularly as an intermediary with CO2, is also advantageous to securing very high laser powers.
  • PurityPlus® argon, an inert gas and thus excellent as a shielding gas in laser welding, affords complete protection against ambient air. Given that it commonally supports plasma generation, it should not be used for laser powers above 3 kW.

No matter what your particular laser welding application here in Minneapolis, you can be sure we’ve got the PurityPlus® specialty gases with the certified high- or ultra-high purity required to fulfill it. Contact Toll Company today.