Patent ID: 7984738
Filing Date: 2011-07-26
Classification: B29C,B29K,C08K,H01F,Y10T

Abstract:
1. A method for controlled temperature bonding with a polymer composition comprising magnetic particles dispersed in a polymer matrix material, the method comprising the steps of: generating electromagnetic induction energy having an electromagnetic induction energy frequency selected from the range of 80 kHz to 30 MHz; pulse width modulating the electromagnetic induction energy to generate a first pulse width modulated electromagnetic energy having a pulse width modulation frequency and a first duty cycle selected from a plurality of duty cycles; heating the polymer composition with the first pulse width modulated electromagnetic induction energy for a first heating interval; pulse width modulating the electromagnetic induction energy to generate a second pulse width modulated electromagnetic induction energy having the pulse width modulation frequency and a second duty cycle selected from the plurality of duty cycles; and heating the polymer composition with the second pulse width modulated electromagnetic induction energy for a second heating interval.