Laser Welding

Laser welding is a method where laser light is used to generate heat at the interface with the welding target. When laser welding is used for resin, “light transmitting resins” and “light absorbing resins” are combined. SUMIKASUPER LCP is compatible with laser welding, but be sure to keep the following points in mind.

<Transmission Side Material>
Since SUMIKASUPER LCP has a filler, laser transmittance (infrared) is low, so it is necessary to reduce the thickness of moldings. Laser welding can be used for moldings with a thickness of up to 0.3mm (please contact us about thicknesses over 0.3mm). Since infrared transmittance is as low as 10 to 30%, there is a narrow application range. As for LCPs compatible with laser welding, grades with a low filler content and grades where only glass fiber is used are best. Grades with inorganic fillers added are not recommended since they have lower transmittance.

<Absorbing Side Material>
Use the same black grade as the transmission side material.

Figure 5-5-1 Testing Method for Laser Welding

Figure 5-5-1 Testing Method for Laser Welding

Table 5-5-1 Laser Weld Strength of SUMIKASUPER LCP

Transmitting side Absorbing side Glass plate Weld strength
(MPa)
Grade Test piece
thickness		 Grade Test piece
thickness
E6008 0.3mm E6008 B 0.5mm disuse 8.6
E6008 0.3mm E6008 B 0.5mm use 10.2
E4008 0.3mm E4008 B 0.5mm disuse 10.1
E6007LHF 0.3mm E4008 B 0.5mm use 15.6
Inquiries about SUMIKASUPER LCP