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Abstract
The design of a combinational
heating system, comprising a  cavity and a steam chamber
for the dye fixation of textiles in the form of tow or sliver padded with
appropriate dyes, is described in detail: The effects of moisture content,
type of dye/textile, depth of shade and temperature distribution on the
electrical characteristics of the resonant cavity are fully investigated.
Over the range of the process parameters examined the cavity remained tuned
and matched to the rest of the circuit and exhibited a coupling efficiency of
about 96%. The rate of dye fixation and penetration of the dye into the fibre
are compared with conventional data. Economic factors relating to its
adoption in a typical industrial continuous dye fixation line for yarns and
tows are discussed. The cavity was designed and constructed at Capenhurst, where the preliminary electrical measurements
were also performed while Ciba-Geigy carried out the dye fixation
experiments.
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