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Machine translation
1. (WO1981001018) SIMULTANEOUS MANUFACTURING OF A PLURALITY OF FILAMENTS BY ELECTROSTATIC PROCESS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/001018    International Application No.:    PCT/CH1980/000120
Publication Date: 16.04.1981 International Filing Date: 02.10.1980
IPC:
D01D 5/00 (2006.01), D04H 13/00 (2006.01)
Applicants:
Inventors:
Priority Data:
9181/79 11.10.1979 CH
Title (EN) SIMULTANEOUS MANUFACTURING OF A PLURALITY OF FILAMENTS BY ELECTROSTATIC PROCESS
(FR) FABRICATION SIMULTANEE D"UNE PLURALITE DE FILAMENTS, PAR VOIE ELECTROSTATIQUE
Abstract: front page image
(EN)The device comprises an inclined conducting plate (1) defining, in cooperation with a vertical conducting plate (8) arranged plumb with the central portion of the plate (1), a V-shaped longitudinal space (12) comprising at the lower part thereof a longitudinal opening (13). A hopper (15) arranged plumb with the plates (1 and 8) supplies the space (12) with thermoplastic material, which material is maintained at a molten state at the plates (1 and 8) by heating these plates by Joule effect. The molten bath thus provided in the space (12) gives rise to the formation of an even molten layer (25) flowing continuously by gravity along the lower portion (1b) of the plate (1). The flowing portion (25) arriving at the level of the lower edge (2) of the plate (1) is then subjected to a strong electrostatic field sufficiently concentrated on that lower edge (field provided by application, on a counter electrode 18 located at a distance from the edge 2, of D.C. high voltage by means of an HT source, the edge 2 being earthed) to drive the electrostatic drawing of that portion in the form of filaments (26). Application particularly to the production of non woven product.
(FR)Le dispositif comprend une plaque conductrice inclinee (1) delimitant, en cooperation avec une plaque conductrice verticale (8) disposee a l"aplomb de la partie centrale de la plaque (1) un espace longitudinal (12) en forme de V comportant a sa partie inferieure une ouverture longitudinale (13). Une tremie (15) disposee a l"aplomb des plaques (1 et 8) assure l"approvisionnement de l"espace (12) en materiau thermoplastique, lequel materiau est maintenu a l"etat fondu au niveau des plaques (1 et 8) par echauffement de ces plaques par effet Joule. Le bain fondu ainsi realise dans l"espace (12) donne lieu alors a la formation d"une couche fondue reguliere (25) s"ecoulant en continu par gravite le long de la partie inferieure (1d) de la plaque (1). La portion d"ecoulement (25) arrivant au niveau du bord inferieur (2) de la plaque (1) est ensuite soumise a un champ electrostatique intense suffisamment concentre sur ce bord inferieur (champ assure par l"application, sur une contre-electrode (18) situee a distance du bord (2), d"une haute tension continue au moyen d"une source HT, le bord (2) etant par ailleurs relie a la masse) pour entrainer le tirage electrostatique de cette portion sous forme de filaments (26). Application notamment a la production de produits non-tisses.
Designated States:
Publication Language: German (DE)
Filing Language: German (DE)