Beghin-Say Sa

Kaysersberg

Beghin-Say

Yves Roussin-Moynier

Guy Goldstein

Finn H Jensen

Willy B Madsen

Ole B Rasmussen

Gerd Albrecht

Guy Vanhoucke

Gareth Thomas

Method of manufacturing homogeneous non-woven web

The invention relates to a net composed of a regular array of longitudinal ribbon-formed continuous filaments of a polymer substance, and a regular array of transverse stems of different polymer matter, said filaments being embedded in said stems, as well as to a process of producing such net from a sheet consisting of a regular array of longitudinal ribbon-like polymer filaments embedded in a polymer matrix, the filament polymer having a higher melting point than the matrix polymer, by transversely impressing said sheet at a temperature where said matrix is at least semi-molten and the filaments are solid, then splitting the structure.

Method of producing a net

Laminated web

Extrusion-die system comprising an extrusion slit (3) fed upstream by two flows of polymeric materials, one of which issues from one or several flat conduits (7,8), the other from a multitude of small holes (18) drilled into a bar element of generally T-shaped cross-section (5). The cross-section of element (5) has a punch-like configuration with the holes being fashioned therein in two parallel rows and being staggered from one row to the other. The die system permits manufacture of products comprising a network of threads or filaments sheathed in a film or foil.

Extrusion apparatus for producing composite structures

Growing community of inventors

Wintzenheim, France

Yves Roussin-Moynier