摘要:
A cured or uncured tyre, reinforced by at least one metallic or metallised reinforcement, for example, a carbon steel wire, film, ribbon or cable, on the outside of which is deposited a layer of metal referred to as "surface metal" selected from copper, nickel and copper-nickel alloys, characterised in that this surface metal layer is itself coated, at least partially, by at least one functionalised graphene layer comprising at least one functional group able to be cross-linked in the cured tyre with a polymer matrix such as a diene elastomer.
摘要:
Ready-to-use metal reinforcement, for example a wire or cable made of bronze-coated carbon steel, able to adhere directly by vulcanisation to a matrix of an unsaturated rubber such as natural rubber, characterised in that its surface is provided with nanoparticles of at least one sulphide of a metal chosen from the group formed of cobalt, copper, iron, zinc and alloys comprising at least one of these elements. Use of such a reinforcement as a reinforcing element in a finished rubber article such as a tire; the presence of these nanoparticles on the reinforcement of the invention in the raw manufactured state allows a strong and durable adhesive bond to be created between the metal and the rubber, by virtue of a strong mechanical and chemical anchoring effect, thereby making it unnecessary to use adhesion-promoting agents such as cobalt salts in the rubber matrices to be reinforced by the reinforcement according to the invention.
摘要:
The invention relates to a bead wire (20) for tyres, comprising: a core (30) including multiple circumferential windings (E1, E2, E3) of at least one core strand (B), each core strand (B) comprising a multifilament core textile fibre embedded in an organic core matrix; and an outer layer (C1) comprising a single outer layer strand (E) including a multifilament outer layer textile fibre embedded in an organic outer layer matrix, said outer layer strand (E) being wound around the core (30).
摘要:
The invention relates to a laminate product (1) having a deformable cellular structure, characterised in that the same comprises at least: an upper strip (2) and a lower strip (3) both oriented in the same main direction (X); disposed between said two strips and for connecting the latter at so-called anchoring areas (4a, 4b), a series (5A, 5B, 5C) of so-called cylindrical connection structures (5) extending in the (X) direction and not contiguous in said (X) direction; and in that each cylindrical connection structure (5) includes a plurality of preferably concentric elementary cylinders (5a, 5b) having their generatrix oriented at an angle Y perpendicular to the (X) direction, said elementary cylinders being fitted into each other and interconnected between them in each anchoring area (4). The elementary cylinders particularly consist of composite cylinders comprising fibres imbedded in a resin matrix. This laminate product can be used as an elastic beam having a high resistance to bending-compression stresses and a high endurance to such repeated or alternating stress, in particular as a shear strip in a non-pneumatic elastic wheel.
摘要:
The invention concerns cellulose formate fibre of liquid crystal origin with high breaking elongation and having the following features: a) under optical polarising microscope, its filaments have a ribbon structure characteristic of its liquid crystal origin; b) it verifies the following relationships: DS ≥ 2; Ar ≥ 8; Te 500; Er > 10, DS being the degree of substitution of cellulose in formate groups in the fibre (in %), Ar the fibre breaking elongation (in %), Te its toughness (in cN/tex), Mi its initial modulus (in cN/tex) and Er its energy at break (in J/g). The invention also concerns the method for obtaining this cellulose formate fibre by dry-jet-wet spinning of a cellulose formate liquid crystal solution, in which water is used as coagulant. The invention further concerns cellulose fibre reclaimed from cellulose formate having itself a high breaking elongation and the method for obtaining this fibre.
摘要:
A cellulose formate-based composition for preparing fibres or films, comprising one or more compounds selected from the group consisting of alkylsulphoxides, lactams, acyclic amides and cyclic urea derivatives as the solvent. A method for preparing said fibres and films, and a regenerated cellulose fibre with a degree of formate group substitution lower than 3 %, for use in textile applications or in reinforcing tyre treads, are also disclosed.