Abstract: A plant for making melt-blown type non-woven fabric including a distributor including at least one main access for placing in fluid passage connection with a main conduit of a case for conveying polymeric fluid and a plurality of secondary accesses for placing in fluid passage connection each with a respective secondary conduit of the case for conveying gas; a dispenser in fluid passage connection with the distributor, for dispersing polymeric filaments from the polymeric fluid and including at least one spinneret for forming the polymeric filaments and an air blade for receiving gas to guide the polymeric filaments exiting the dispenser. The spinneret comprises includes a plurality of pinnacles flanked and each including a main outlet for conveying polymeric fluid. towards a respective delivery direction. The air blade is to convey gas jets to converge towards each delivery direction.

Abstract: A plant for making spunbond type polymeric filament defining an extrusion direction and including, in order along the extrusion direction, an extrusion head including at least one main channel to allow the passage of polymeric fluid through the extrusion head, a distributor including at least one distribution conduit in fluid passage connection with the main channel to distribute the fluid, at least one spinneret having holes each running parallel to the extrusion direction in fluid passage connection with the distribution conduit and suitable for extruding the fluid to make a respective polymeric filament, at least one distribution tank between the distributor, downstream of the conduit, and the spinneret, upstream of the holes, connecting, in fluid passage connection, the conduit and holes and defining a first thickness along the extrusion direction between 3 and 5 mm.

Abstract: Distributor of polymeric filament for spunbond and/or melt-blown type implant expanding along a main plane between a first interface side, to be coupled with an extrusion head, and a second interface side, to be coupled with a spinneret. Including distribution holes distributed within an extrusion area defined on the first side parallel to the main plane, extending along respective secondary axes transverse to the main plane from the first to the second side. Each defining a countersink converging from the first to the second side and delimited by perimetrical edges at the first side. Each perimetrical edge of a given hole is at least partially coincident with part of the perimetrical edges of other holes positioned around the given hole to realise a distribution surface, defined by the whole of the areas enclosed by the perimetrical edges, at least 80% of the extrusion area.

Abstract: A cusp die for producing melt-blown non-woven fabric is provided, defining a sagittal plane, a main extension direction on the sagittal plane, a first flank and a second flank mutually bounded by the sagittal plane and including an ejection portion extending along the main extension direction and designed to convey, in use, polymeric fluid towards an external air blade, at least one extrusion pipe configured to convey the polymeric fluid towards the ejection portion, a plurality of holes arranged in the ejection portion, placed in fluidic through connection with the extrusion pipe and communicating with the outside, wherein the holes are arranged along at least one first row and a second row that are distinct and arranged respectively at the first flank and the second flank.

Abstract: Multi-row coaxial melt-blown system including support including first duct to convey polymeric fluid parallel to a delivery direction and second duct to convey air or gas, a box removably constrained to the support and including acceleration ducts parallel delivery direction including tubing in fluid connection with first duct to distribute the fluid, first holes parallel the delivery direction, centred and spaced relative to acceleration ducts along the delivery direction to house each part of a respective tube, second holes parallel the delivery direction for air or gas passage, and a slit extending transversely to the delivery direction between the acceleration ducts and the first holes in fluid connection with the second holes. The support includes a housing to contain the box and the slit extends in the box from side to side in fluid connection with the second duct to convey air or gas from second duct to second holes.

Abstract: A cusp die for producing melt-blown non-woven fabric is provided, defining a sagittal plane, a main extension direction on the sagittal plane, a first flank and a second flank mutually bounded by the sagittal plane and including an ejection portion extending along the main extension direction and designed to convey, in use, polymeric fluid towards an external air blade, at least one extrusion pipe configured to convey the polymeric fluid towards the ejection portion, a plurality of holes arranged in the ejection portion, placed in fluidic through connection with the extrusion pipe and communicating with the outside, wherein the holes are arranged along at least one first row and a second row that are distinct and arranged respectively at the first flank and the second flank.

Abstract: A device is provided for making polymer fibre for a system of the spunbond and/or melt-blown type, including a distributor including at least one distribution pipe adapted to distribute the polymer fluid, filter arranged upstream of the distribution pipe so as to filter the polymer fluid, wherein the filter include a porous element defining a plurality of non-rectilinear through channels.