Abstract:
Un procédé de fabrication d'un assemblage (A) d'éléments filaires (14) enroulés ensemble en hélice comprend : - une étape de retordage d'au moins des premier et deuxième éléments filaires (14), les premier et deuxième éléments filaires (14) étant retordus séparément l'un de l'autre, - une étape de préformation en hélice d'au moins les premier et deuxième éléments filaires retordus (14), les premier et deuxième éléments filaires retordus (14) étant préformés séparément l'un de l'autre, - une étape d'assemblage d'au moins les premier et deuxième éléments filaires (14) retordus et préformés pour former l'assemblage (A) d'éléments filaires (14).
Abstract:
The present invention pertains to a parallel rope comprising elongate bodies wherein the length axis of the elongate bodies is parallel to the length of the rope or wherein the elongate bodies show helix angles smaller than 2°, characterized in that the elongate bodies comprise tapes of ultra-high molecular weight polyethylene, the tapes having a width to thickness ratio of at least 10 and a polymer solvent content below 0.05 wt.%. It has been found that a parallel rope based on the specified polyethylene tapes shows high modulus in combination with low weight, a long life-span, and low creep. If so desired, the rope may be free of non-polyethylene low-molecular weight components, as the tapes do not require the presence of a finish.
Abstract:
A fine steel cord for the reinforcement of synchronous belts is presented. The fine cord has a distinct load elongation curve characterized by a very low structural elongation (below 0.09% preferably below 0.06%), and a high equivalent modulus between 0.2 and 20% of the breaking ', load. The favorable results are maintained when the cords are coated with an elastomer coating. Such a fine steel cord reduces the geometrical spread on the tooth pitch of the synchronous belts during use. A method to produce such a fine steel cord is also presented.
Abstract:
L'installation (10) permet la fabrication d'au moins des premier et deuxième assemblages (26, 28) de M1 éléments filaires et M2 éléments filaires comprenant plusieurs des éléments filaires (14) enroulés ensemble en hélice. L'installation (10) comprend : des moyens (18) d'assemblage de M éléments filaires (14, 17) ensemble en une couche de M éléments filaires (17) autour d'un noyau transitoire (16) pour former un assemblage transitoire (22), et des moyens (24) de fractionnement de l'assemblage transitoire (22) en au moins les premier et deuxième assemblages (26, 28) de M1 éléments filaires et M2 éléments filaires.
Abstract:
The present invention pertains to a parallel rope comprising elongate bodies wherein the length axis of the elongate bodies is parallel to the length of the rope or wherein the elongate bodies show helix angles smaller than 2°, characterized in that the elongate bodies comprise tapes of ultra-high molecular weight polyethylene, the tapes having a width to thickness ratio of at least 10 and a polymer solvent content below 0.05 wt.%. It has been found that a parallel rope based on the specified polyethylene tapes shows high modulus in combination with low weight, a long life-span, and low creep. If so desired, the rope may be free of non-polyethylene low-molecular weight components, as the tapes do not require the presence of a finish.
Abstract:
A tyre comprising a carcass structure comprising at least one carcass ply (101), a belt structure (105) applied in a radially outer position with respect to said carcass structure and a tread band (106) applied in a radially outer position with respect to said belt structure is described. The belt structure (105) comprises at least one reinforcing strip (105d) incorporating a plurality of reinforcing elements arranged substantially in the circumferential direction. The reinforcing elements comprise at least one high - elongation metal cord. The metal cord comprises a plurality (m) of intertwined strands (201) and each strand comprises a plurality (n) of filaments (202,203). Advantageously all the filaments (202,203) of each strand (201) have a diameter not greater than 0.175 mm.
Abstract:
The invention relates to a multi-strand cord with a K x (L+M) construction, which can be used in particular for reinforcing the belts of tyres for industrial vehicles, consisting of K basic strands helically assembled at a pitch P?, each basic strand: comprising a cord (10) having two layers (Ci, Ce) with an L+M construction, rubberised in situ, comprising an inner layer (Ci) made up of L wires (11) with a diameter d1, L varying from 1 to 4, and an outer layer (Ce) of M wires (12), M being no lower than 5, with a diameter d2 and helically assembled at a pitch p2 around the inner layer (Ci); and having the following characteristics (d1, d2 and p2 being given in mm): - 0.10 1 2 2
Abstract:
A braided structure that includes a core and a sheath is provided. The core includes a yarn formed at least in part from an aromatic polymer (e.g., an aromatic polyester/liquid crystalline polymer or an aramid polymer), and the sheath, which includes a plurality of ultra high molecular weight polyolefin yarns, is braided around the core. The sheath has an overall diameter ranging from about 60 micrometers to about 650 micrometers. Despite its small diameter, the braided structure can be creep resistant and abrasion resistant while at the same time exhibiting low elongation, a high load at break, and high stiffness. The braided structure can be used in medical applications such as sutures, load bearing orthopedic applications, artificial tendons/ligaments, fixation devices, actuation cables, components for tissue repair, etc.