First, the principle
The main function of the laser marking powder is to absorb the
laser energy, convert the laser beam into heat energy, generate
thermal reaction, carbonization, evaporation and chemical reaction
of the plastic itself, so as to form a marking pattern on the
surface of the product;
The principle of "coloring" for laser marking
a. carbonization method
After laser irradiation, the additive heats up so that the
surrounding resin is coked, leaving the workpiece with a black
mark, and this method is generally applied to a light-colored
substrate. Generally common in the "white to black" technology.
b. Foaming method
The additive generates heat to achieve the degree of degradation of
the resin to generate hot gas to form a large number of fine
bubbles, which can be made into a light color or a white marking
effect, which is used for deep color and black substrates.
Generally used in the "black and white" technology.
c. ablation method
The resin is completely vaporized with a high energy laser to cause
the substrate to have a concave texture. Generally used in laser
direct molding technology (LDS) (Laser Direct Structuring)
c. Self-discoloration of additives
After laser excitation, the additive undergoes a chemical change,
which makes the color of the additive darker. This method is
applied to a substrate with a light color. Generally used in the
technology of "white and black".
Most general-purpose plastics and some engineering plastics, such
as PP, PE, PVC, PBT, PET, PA, ABS, POM, PS, PC, TUP, PUS, EVA,
etc., can also be used for plastic alloys such as PC/ABS. The laser
marking is clear and bright, marking black and white writing.
Three thousandths - five or so, depending on the transparency of
the plastic, the color is black, white and gray. According to the
different plastic raw materials provided by the manufacturer, the
company can give the matching formula recommended to achieve the
effect of laser marking on plastic.
Suitable for laser marking machine source type and wavelength
range: CO2 laser, light laser, Nd solid laser, infrared laser,
wavelength range: 308-1064nm.
Can be identified in:
Naturally colored plastic, white plastic, colored plastic, black
plastic laser marking has been successfully commercialized,
including animal ear tags, light switch covers, cosmetic packaging
materials, automotive interior buttons and door handles, instrument
panels, ABS keyboards for commercial machines, HDPE, ie, PET and
PVC rigid containers and container covers, nylon and PBT automotive
and non-automotive electrical connectors, hood components such as
fuse boxes and air caps, security labels, container locks,
stationery, appliance housings, etc.
Laser welding of plastics has been successfully applied in the
field of relays.