Abstract: An aerosol metering valve comprising: (a) a valve stem movable between a rest position and a firing position comprising: a body portion comprising a circumferential sealing surface (b) a valve body comprising: a body wall, and an internal chamber defined at least in part by the body wall; and (c) a metering gasket having an inner periphery defining an aperture, being disposed near the most interior end of the internal chamber and being configured to be able to form a transient, substantially fluid-tight face seal against the circumferential sealing surface of the valve stem, where at the rest position of the valve stem, the body portion of the valve stem is located within the internal chamber and as the valve stem is moved from its rest position towards its firing position the circumferential sealing surface of the valve stem contacts the metering gasket to form a face seal thereby closing a metering chamber and thereafter further movement of the valve stem towards its firing position causes the metering gask

Abstract: An aerosol metering valve comprising: (a) a valve stem movable between a rest position and a firing position comprising: a body portion comprising a circumferential sealing surface (b) a valve body comprising: a body wall, and an internal chamber defined at least in part by the body wall; and (c) a metering gasket having an inner periphery defining an aperture, being disposed near the most interior end of the internal chamber and being configured to be able to form a transient, substantially fluid-tight face seal against the circumferential sealing surface of the valve stem, where at the rest position of the valve stem, the body portion of the valve stem is located within the internal chamber and as the valve stem is moved from its rest position towards its firing position the circumferential sealing surface of the valve stem contacts the metering gasket to form a face seal thereby closing a metering chamber and thereafter further movement of the valve stem towards its firing position causes the metering gask

Abstract: An industrial fabric comprising at least two separate continuous layers. Each layer includes at least one segment (1) fabricated as a plastics extrusion, such as a strip or panel. The layers are joined by means of cooperating linear interlocking structures (10) located on contiguous planar faces of the segments in the layers. After engagement to form a joint, the cooperating linear interlocking structures provide and maintain a void volume (30) between the layers, and resist compressive loading of the fabric in a more or less predictable manner. The segments may be fabricated from differing thermoplastics so as to impart differing physical properties to each layer. The segments may be porous or non-porous. The industrial fabrics are suitable for use in filtration, membrane, geotechnical and like applications, and find particular utility in continuous filtration applications such as pulp and paper making, sludge dewatering and the like.

Abstract: Sheet material which incorporates selected particulate is produced using a blown film die (1); polymer containing the selected particulate is supplied to the die inlet so that, when the polymer is extruded through the die and expanded to form a blown film (6), the selected particulate is incorporated in the blown film; and the selected particulate is added to a part only of the polymer supplied to the die, so that the particulate will be present in only a certain part, for example a surface, of the blown film and of sheet material produced from the blown film.

Abstract: Strong rigid foams comprising one or more layer minerals useful as insulation and fire-protection materials contain cells of which the mean diameter is below 60 microns, 90% have a diameter below 100 microns and substantially all are of diameter below 150 microns and are made by gasifying an aqueous suspension of the layer mineral(s) to produce a wet foam or froth containing bubbles of gas of which the diameters are as stated above and removing water from the wet foam or froth.

Abstract: A rigid inorganic foam of cellular structure comprising one or more layer minerals, and a method for making inorganic foams comprising gasifying a suspension of one or more layer minerals in a liquid medium, shaping the gasified suspension, and removing the liquid medium from the shaped gasified suspension.