Abstract: The present invention relates to flexible, three-dimensional articles consisting of a flexible, two-dimensional, unimpregnated, braided structure based on yarns or tows preferably having a high modulus of elasticity and possessing a varying cross-section. These articles are intermediates in the production of shaped articles which are both strong and light.
Type:
Grant
Filed:
August 29, 1978
Date of Patent:
October 14, 1980
Assignee:
Societe Civile d'Etudes et de Recherches pour L'Obtention de Fibres Minerales (S.E.R.O.F.I.M.)
Abstract: This invention provides a light ply of parallel continuous high-performance filaments, and a method of obtaining same.The ply is characterized by a weight per unit surface of at most 450 g/m2, a thickness of at most 1 mm, a content of at least 85% by weight of high-performance fibers, a close structure, and furthermore comprising on at least one of its two faces fused synthetic yarns arranged transversely with respect to the direction of the high-performance filaments which hold the latter in place without passing through the ply from one face to the other.The plies thus obtained are used for the manufacture of high-performance composite materials.
Type:
Grant
Filed:
April 19, 1973
Date of Patent:
April 27, 1976
Assignee:
Societe Civile D'Etudes et de Recherches pour L'Obtention de Fibres Minerales (S.E.R.O.F.I.M.)