摘要:
The present invention relates to a tyre having a sealant layer in order to prevent the leakage of air (or gas) in case of a puncture, and a system for the detection of the puncture for subsequent warning of the driver. The puncture detection system in turn comprises a sensor layer constructed in such a way as to simplify the operation of removing the sealant layer during the disposal of the tyre.
摘要:
Sensor mesh suitable for use in a system for the detection of a puncture in a tyre, said sensor element having a wire structure arranged as a net comprising a first set of wires arranged according to a first direction (A) and a second set of wires arranged according to a second direction (B), in order to form meshes (M) of said net structure, wherein said wires of said first set of wires are of electrically non-conductive material and said wires of said second set of wires are of electrically conductive material, said wires of electrically conductive material being electrically connectable to each other in order to form a circuit configuration (c1, c2, c3, c4, c5), each of said meshes (M) having an inner area (A M ) of between 0.25 mm 2 and 100 mm 2 .
摘要:
A method to produce a compound for a tyre sealant layer, comprising a swelling step, during which a crumb rubber is immersed in a process oil chosen among the ones belonging to the families of paraffin process oils, naphthene process oils or natural process oils, so as to obtain a crumb rubber that swells due to the absorption of the process oil; and a following mixing step, during which said swollen crumb rubber is mixed with at least one polymer base consisting of an essentially saturated polymer.
摘要:
A tyre comprising an impermeable layer designed to ensure the sealing under pressure of the air contained in the inner cavity of the carcass and a foam material provided on the inside of said inner cavity, wherein the foam material is made up of open cell foam with a cell size or diameter of from 150 to 190 μm and a standard deviation of 5% to 15%
摘要:
A rubber compound for tyres comprising at least one cross- linkable polymer base, a reinforcing filler, a vulcanization system, a reinforcing resin and a dithiol chemical with formula (I) SHRSH (I) wherein R is an aliphatic or aromatic group composed of 3-12 atoms.
摘要:
A rubber tyre compound production method having a mixing step, in which at least one cross-linking, unsaturated-chain polymer base, silica, a silane bonding agent, and 0.6 to 5 phr of a chemical of general formula (I) are mixed with one another; and a following mixing step, in which at least stearic acid and a curing system are added to and mixed with the compound being prepared; (I) wherein : R 1 , R 2 and R 3 , which are the same or different, are chosen from the group consisting of: hydrogen and groups in the alkane, alkene, cycloalkane, heterocyclic compound, aromatic compound, amine, imine, amide, sulphide, alcohol, aldehyde, ketone, ether, ester, nitrile, nitro-derivative, and isocyanate families.
摘要:
Rubber compound for the preparation of a tread portion of a pneumatic tyre comprising at least a cross-linkable unsaturated chain polymer base, a filler and a vulcanization system and a wax composed of at least 50% by weight of nonacosanediols.
摘要:
Pneumatic tyre (1) comprising a carcass ply (11), two ring beads (12), a tread strip (10), a tread belt (15) comprising at least two tread plies (16), an innerliner (2) and an additional functional material layer (4, 5) arranged between the innerliner (2) and the inner cavity (17) of the pneumatic tyre (1), wherein between the innerliner (2) and the additional functional material layer (4, 5) a net layer (3) is interposed, which facilitates the removal of the additional functional material layer (4, 5) during disposal at the end-of-life of the pneumatic tyre (1).
摘要:
Tyre sealant layer made from a rubber compound comprising at least a polymer base and a filler comprising a magnetic material in the form of nanoparticles with dimensions of between 1 and 100 nm.
摘要:
A method for preparing a rubber compound comprising at least one first mixing step in which at least part of a cross- linkable polymer base is mixed at least with a reactive reinforcing filler, a dendrimer functionalized with polar groups adapted to interact with the reactive reinforcing filler and a nucleophile agent; and a subsequent mixing step in which the compound being prepared is mixed with a vulcanization system.