B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 35/08 (2006.01) B29B 17/02 (2006.01) B29C 65/14 (2006.01) B29C 65/36 (2006.01) B29C 67/24 (2006.01) B29C 70/88 (2006.01) H05B 6/02 (2006.01) B29C 65/48 (2006.01)
Patent
CA 2058335
Both a system and method are provided for remotely heating a polymeric material to a selected temperature. The system generally comprises particulate ferro- magnetic material dispersed throughout the polymeric material to form a composite, wherein the particulate material has a Curie temperature that corresponds to the selected heating temperature, and a source of microwave energy for remotely applying a beam of microwave energy to the polymeric composite material. Preferably, the particulate ferromagnetic material comprises only about 2 percent of the total composite by weight. The polymeric material may be compliant, thermosettable plastic, and the Curie temperature of the particulate ferromagnetic material dispersed therein may advantageously be above the curing temperature of the polymer, such that the beam from the source of microwave energy may be used to remotely join surfaces or construct joints in composite structures. Alternatively, the polymeric material may be a meltable plastic, and the Curie temperature of the particulate ferromagnetic material may be chosen to be above the temperature of fusion of the polymer to create a polymeric composite which is magnetically separable from other polymers within a solid waste facility, and which may be melted down for recycling purposes. In a variation of this embodiment, a heat actuatable degradation chemical may be dispersed through the polymeric material along with the ferro-magnetic material to create a plastic composite which is selectively degradable by the remote application of microwave energy.
Clark William Guy Jr.
Junker Warren Robert
Shannon Robert Edward
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Westinghouse Electric Corporation
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