Zortech International Limited

Other

Tony M Matthews

James D Jackson

Derek E Morgan

Darren J Glover

A surface of a hydrophobic microporous thermal insulation material is coated by first heating the surface of the microporous thermal insulation material so as to provide a hydrophilic surface layer on the hydrophobic material. Subsequently, a water-based coating, such as a water-based silicate adhesive, is applied to the hydrophilic surface layer of the hydrophobic material. An abrasive-and/or impact-resistant cover, such as a glass fibre cloth, may be applied to the coating.

Coating surface of hydrophobic microporous thermal insulation material

A microporous thermal insulation material is formed from an intimate mixture of a dry particulate microporous material and reinforcing glass filaments. The glass constituting the glass filaments contains not more than 1 per cent by weight Na.sub.2 O and preferably has the following composition:

Microporous thermal insulation material

An electro-therapy apparatus includes at least two electrodes adapted to feed oscillating current to selected sites on or beneath the epidermal or mucous surface remote from a treatment site. A common return electrode is provided at the treatment site which is subjected to the sum of the currents from the two feed electrodes. The feed electrodes may be contact feed electrodes or capacitative feed electrodes. The feed electrodes may operate at different frequencies so that the treatment site is stimulated by the beat frequency. This may be at or about 80 or 130 Hz, if an anaesthetizing effect is required.

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Kidderminster, United Kingdom

Tony M Matthews