Laser Peeling

About Laser Processing

Laser processing is a form of thermal processing in which an object is irradiated with a light that has a high energy density (a laser beam). As the object absorbs energy from the laser beam, the surface temperature increases rapidly, causing the object to change states (to peel or to melt) as it reaches its melting or boiling point.

Laser Principles

Laser Principles

Laser Structure

Gas laser Solid-state laser
Excitation source Electrical discharge Light(LD)
Laser medium CO2, etc YAG, etc
Amplifier Optical resonator

Types, Applications, and Properties of Lasers

Two types of lasers, gas and solid-state, are used in the plastics industry.
Applications for lasers include 1. drilling, 2. cutting, 3. removing paint, 4. printing (marking), and 5. welding. The type of laser used depends on the material.

Laser Properties

Material Solid-state (YAG) laser Gas (CO2) laser
Wavelength 1.06μ Wavelength 10.6μ
Invisible light (infrared) Invisible light (infrared)
Plastic
Paint
Metal ×(Stainless is OK)
Plating ×
Transparencies (glass, resin) ×
Ceramic

Examples of Laser Processing

1. Laser type

Solid-state (YAG) laser

2. Applications

Removing paint

3. Resin Materials

PC

4. Processing

Add red print to a section of the PC molded item and paint the entire surface black.
Use a laser to remove paint from the sections that transmit light.