Abrégé

A cusp die (1) for producing melt-blown non-woven fabric is provided, defining a sagittal plane (1a), a main extension direction (1b) on the sagittal plane (1a), a first flank (10) and a second flank (11) mutually bounded by the sagittal plane (1a) and comprising an ejection portion (2) extending along the main extension direction (1b) and designed to convey, in use, polymeric fluid towards an external air blade, at least one extrusion pipe (3) configured to convey the polymeric fluid towards the ejection portion (2), a plurality of holes (4) arranged in the ejection portion (2), placed in fluidic through connection with the extrusion pipe (3) and communicating with the outside, wherein the holes (4) are arranged along at least one first row (4a) and a second row (4b) that are distinct and arranged respectively at the first flank (10) and the second flank (11).

Classes IPC  ?

• D01D 4/02 - Filières

Abrégé

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.

Classes IPC  ?

• D01D 4/02 - Filières
• D01D 5/098 - Méthodes de filage à partir de masses en fusion avec étirage simultané
• D04H 1/56 - Non-tissés formés uniquement ou principalement de fibres coupées ou autres fibres similaires relativement courtes à partir de voiles ou couches composés de fibres ne possédant pas des propriétés cohésives réelles ou potentielles par soudage des fibres ensembles, p. ex. par fusion partielle ou dissolution en association avec la formation de la fibre, p. ex. suivant immédiatement l'extrusion des fibres en brin
• D04H 3/16 - Non-tissés formés uniquement ou principalement de fils ou de matériaux filamenteux similaires de bonne longueur caractérisés par la méthode de renforcement ou de consolidation avec liages produits par soudage entre fils thermoplastiques ou filaments avec liages entre filaments thermoplastiques produits en relation avec la formation des filaments, p. ex. suivant immédiatement l'extrusion

Abrégé

A device (1) is provided for making polymer fibre for a system of the spunbond and/or melt-blown type, comprising a distributor (3) including at least one distribution pipe (30) adapted to distribute the polymer fluid, filtering means (4) arranged upstream of the distribution pipe (30) so as to filter the polymer fluid, wherein the filtering means (4) include a porous element (40) defining a plurality of non-rectilinear passage channels of varying sizes.

Classes IPC  ?

• D01D 1/10 - Filtration ou dégazage de la solution ou de la masse de filage
• D01D 5/098 - Méthodes de filage à partir de masses en fusion avec étirage simultané