Patent classifications
G01N23/185
Deterioration analyzing method
The present invention provides a method of deterioration analysis that enables detailed analysis of the deterioration, especially of the surface, of a polymer material containing at least two diene polymers. The present invention relates to a method of deterioration analysis including: irradiating a polymer material containing at least two diene polymers with high intensity x-rays; and measuring x-ray absorption while varying the energy of the x-rays, to analyze the deterioration of each diene polymer.
Method for calibrating an X-ray testing system for a tire type and method for checking the position of cords in a tire
A method for calibrating an X-ray inspection system for a tire. The X-ray inspection system includes an X-ray tube, a linear X-ray detector, and a manipulator for the tire. The method includes moving one of the X-ray tube, the linear X-ray detector, and the manipulator along a travel path from a set starting position to a set end position, capturing, at a preset reading rate during the movement of one of the X-ray tube, the linear X-ray detector, and the manipulator, a continuous capture of X-ray radiography images of a cord within the tire, tracking the cord using successive X-ray radiography images, and deducing an absolute position of the cord using a total shift of the cord in the X-ray radiography images between the starting position and the end position and using known geometric data.
Rubber composition for tires, method for preparing rubber composition for tires, and tire
Provided are a rubber composition for tires having low tan δ at approximately 60° C. and excellent breaking energy at approximately 25° C.; a method for preparing the rubber composition for tires; and a tire thereof. The present invention relates to a rubber composition for tires which contains a rubber component including an isoprene-based rubber, and which has a correlation length Ξ.sub.b of 50 nm or less as determined by fitting the following Equations 1 to 6 to a scattering intensity curve I(q) obtained by X-ray scattering analysis or neutron scattering analysis:
Method and system for estimating the severity of tire usage conditions
A method for estimating the severity of conditions of use of a tire installed on a vehicle comprises the following steps: a step of measuring the speed of the vehicle and the load of the vehicle, a step of evaluating, as a function of the measurements performed, the power of the internal heat dissipations of the tyres, and a step of determining, as a function of this power, the internal temperature of the tyre, a step of recording the number of wheel revolutions performed and/or the time spent in conditions of use corresponding to a given temperature interval. There is also a system that makes it possible to implement said method.
Elastomeric materials for components of tyres and tyres comprising modified silicate fibres
The present invention relates to new vulcanisable elastomeric compositions for components of tyres, comprising modified silicate fibres as fillers. The silicate fibres are modified according to the process with controlled pH of the invention. In addition, the invention regards components of tyres, comprising elastomeric materials obtainable by vulcanisation of said compositions, and tyres for vehicles comprising one or more of said components. The vulcanised elastomeric materials according to the invention are characterised by good static and dynamic mechanical properties, in particular by particularly low hysteresis. Advantageously the tyres of the invention comprising one or more of said components have a limited rolling resistance.
Tire distortion detection method
A tire distortion detection method includes a first step of forming a portion to be detected on a surface of an inner liner, a second step of detecting the portion to be detected in any two states from a formation of a product tire from a tire component including the inner liner to a change for a load condition on the product tire, and a third step of comparing positions of the portions to be detected in the two states obtained in the second step.
Method for checking the location of elements in a tire in an X-ray inspection system, X-ray inspection system for carrying out such a method as well as use of such an X-ray inspection system for carrying out such method
A method for checking the location of elements in a tire in an X-ray inspection system. The X-ray inspection system has an X-ray tube, a linear X-ray detector and a manipulator. The method includes: using a three-dimensional model of the tire, in which potential locations of the elements in the tire are described; recording two-dimensional X-ray line images of the tire elements consisting of pixels, which are described by a vector from the X-ray tube through the element to the X-ray detector; allocation of the pixels of an element from the two-dimensional X-ray line image to the three-dimensional model of the tire, in that the intersection point of a straight line through the X-ray tube with the vector of the pixel from the two-dimensional X-ray line image is assigned with the potential location of the element of the three-dimensional model as a point in the space for the pixel.
METHOD FOR EXPLOITING PRESSURE AND TEMPERATURE MEASUREMENTS OF A VEHICLE TIRE
A method for processing inflation defects of a tyre of a vehicle is disclosed, the tyre being equipped with sensors for measuring the pressure and the temperature of the internal cavity of said tyre. The pressure and the temperature of the internal cavity of the tyre are measured periodically and, as soon as an inflation defect of a tyre is detected, an alert is signalled to the driver of the vehicle, in which there is also transmitted to the driver of the vehicle a maximum speed setpoint: which, when the measured inflation pressure of the tyre is greater than or equal to a first inflation pressure threshold value p.sub.1, is a first maximum speed setpoint value V.sub.1; and which, when the measured inflation pressure of the tyre is less than said first pressure threshold value p.sub.1 and greater than or equal to a second pressure threshold value p.sub.2, decreases as a function of said measured inflation pressure of the tyre.
ELASTOMERIC MATERIALS FOR COMPONENTS OF TYRES AND TYRES COMPRISING MODIFIED SILICATE FIBRES
The present invention relates to new vulcanisable elastomeric compositions for components of tyres, comprising modified silicate fibres as fillers. The silicate fibres are modified according to the process with controlled pH of the invention. In addition, the invention regards components of tyres, comprising elastomeric materials obtainable by vulcanisation of said compositions, and tyres for vehicles comprising one or more of said components. The vulcanised elastomeric materials according to the invention are characterised by good static and dynamic mechanical properties, in particular by particularly low hysteresis. Advantageously the tyres of the invention comprising one or more of said components have a limited rolling resistance.
Method for exploiting pressure and temperature measurements of a vehicle tire
A method for processing inflation defects of a tyre of a vehicle is disclosed, the tyre being equipped with sensors for measuring the pressure and the temperature of the internal cavity of said tyre. The pressure and the temperature of the internal cavity of the tyre are measured periodically and, as soon as an inflation defect of a tyre is detected, an alert is signalled to the driver of the vehicle, in which there is also transmitted to the driver of the vehicle a maximum speed setpoint: which, when the measured inflation pressure of the tyre is greater than or equal to a first inflation pressure threshold value p.sub.1, is a first maximum speed setpoint value V.sub.1; and which, when the measured inflation pressure of the tyre is less than said first pressure threshold value p.sub.1 and greater than or equal to a second pressure threshold value p.sub.2, decreases as a function of said measured inflation pressure of the tyre.