Induction heating using dual susceptors
First Claim
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1. A heating agent for heating thermoplastic materials comprising (a) electrically non-conductive susceptors and (b) electrically conductive susceptors.
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Abstract
The invention relates to an agent for heating materials comprising (a) at least one plurality of electrically non-conductive susceptors and (b) at least one plurality of electrically conductive susceptors. Preferably the electrically non-conductive susceptors comprise micron-sized ferrimagnetic particles and the electrically conductive particles comprise ferromagnetic particles or intrinsically conductive polymer particles.
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Citations
90 Claims
- 1. A heating agent for heating thermoplastic materials comprising (a) electrically non-conductive susceptors and (b) electrically conductive susceptors.
- 16. A welding agent comprising (a) a matrix material and (b) an agent for heating the material, wherein the agent comprises (1) at least one plurality of electrically non-conductive susceptors and (2) at least one plurality of electrically conductive susceptors.
- 32. An article of manufacture comprising (a) a matrix material and (b) an agent for heating the material, wherein the agent comprises (1) at least one plurality of electrically non-conductive susceptors and (2) at least one plurality of electrically conductive susceptors.
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48. A method of rapid heating of a thermoplastic material comprising
(a) providing a first thermoplastic material, (b) providing at least one plurality of electrically non-conductive susceptors having a specific Curie temperature (Tc) in the first thermoplastic material, (c) providing at least one plurality of electrically conductive susceptors, (d) applying an alternating magnetic field to the first thermoplastic material to heat the susceptors, and (e) ceasing the applying of the alternating magnetic field when the susceptors reach the desired temperature.
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64. A method of rapid heating of a polymeric material comprising
(a) providing at least one polymeric material, (b) heating the polymeric material, (c) dispersing at least one plurality of electrically non-conductive susceptors having a specific Curie temperature (Tc) in the polymeric material, (d) dispersing at least one plurality of electrically conductive susceptors, (e) forming the polymeric material, (f) applying an alternating magnetic field to the polymeric material, (g) heating the susceptors and heating the polymeric material, and (h) ceasing the application of the alternating field when the susceptors reach the desired temperature.
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72. A method of heating a material comprising
(a) providing at least one plurality of electrically non-conductive susceptors in the material having a specific Curie temperature (Tc) in the material, (b) providing at least one plurality of electrically conductive susceptors in the material, (c) applying an alternating magnetic field to the material, wherein the susceptors in (a) generate heat due to hysteresis loss and the susceptors in (b) generate heat due to eddy current flow.
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80. A sealable apparatus comprising
a first element having a shaped matrix and having a rim; -
a second element having an annular area for bonding to the rim of the first element, at least one plurality of electrically non-conductive susceptors and at least one plurality of electrically conductive susceptors disposed in the rim of the first element or in the annular area of the second element, for heating the rim or the annular area to a desired temperature upon application of an alternating magnetic field, for bonding the first element and the second element together. - View Dependent Claims (81, 82, 83, 84, 85, 86, 87, 88, 89, 90)
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Specification