Welding by Ultrasonic Wave

Ultrasonic welding is a method of bonding by melting the bonding surface through frictional heat generation using ultrasonic waves (20 to 40kHz). All SUMIKASUPER LCP grades can be welded using ultrasonic vibration. The strength of the bonded surface remains virtually unchanged even after thermal aging for 1 hour at 250°C.

Welding Strength Measurement Method

The test conditions are as follows.

  • Test piece
    12.7 x 78 x 1.6mm 2 test pieces
    (One test piece has the protrusion shown below.)
  • Welding method
    After setting the test pieces as shown in the figure on the right, the test pieces were shaken for 0.6 to 0.8 seconds at a frequency of 19.5kHz, an amplitude of 34μm, and a load of 176.4N.
  • Measurement of welding strength
    Measure the shear strength at a tensile speed of 1.67 x 10-4m/s.

Table 5-2-1 Weldability by Ultrasonic Welder (Unit : N)

  Weld strength(N)
After welding
250°C,1hr
thermal aging
E5008L 650 570
E5008 510 400
E4008 460 460
E6008 740 740
E6006L 710 650

Figure 5-2-1 Test Method for Ultrasonic Welding

Figure 5-2-1 Test Method for Ultrasonic Welding
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