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Elastic laminate material, and method of making

  • US 20060169387A1
  • Filed: 12/30/2005
  • Published: 08/03/2006
  • Est. Priority Date: 01/03/2005
  • Status: Abandoned Application
First Claim
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1. A method of welding a nonwoven layer to a base layer, the method comprising:

  • (a) providing an ultrasonic system comprising an anvil and a horn stack comprising a horn, the anvil and horn having a gap therebetween;

    (b) placing the nonwoven layer and the base layer together within the gap between the anvil and the horn;

    (c) rotating at least one of the horn and the anvil while vibrating the horn with ultrasonic energy to obtain a frequency;

    (d) contacting the nonwoven layer and the base layer with the horn and the anvil;

    (e) monitoring at least one of the frequency and a temperature of at least one of the horn or the anvil; and

    (f) while maintaining the gap between the anvil and the horn based on either the temperature or a change in the frequency, welding the nonwoven layer to the base layer.

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