Method of producing a net
AssigneeBeghin-Say S.A.
InventorsWilly B. Madsen, Finn H. Jensen, Ole B. Rasmussen, Guy Goldstein, Yves Roussin-Moynier
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Abstract
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.
Claims20
Method of producing a net comprising the steps of forming a film or sheet consisting of a regular array of continuous, longitudinal, ribbon-formed filaments of a higher melting polymer substance (A) which are spaced apart from one another and which are each embedded in a matrix of lower melting polymer matter, subsequently impressing said film or sheet according to a linear, transverse pattern at a temperature at which the matrix is molten to semimolten, and (A) is pronouncedly more solid, and at a pressure adapted to collect at least the main portion of said lower melting polymer matter in a regular pattern of transverse stems, but leaving said filaments substantially undamaged, and subjecting the lower melting polymer matter to splitting between the filaments of (A) in said impressed areas.
Dependencies are inferred from the claim text.