摘要:
Provided is a method of testing rubber wear in which a wear phenomenon occurred in a tire can be precisely reproduced in a sample, and a method of calculating the rubber index of a tire using the method of testing rubber wear.Also provided is a test method for predicting the anti-wear properties of a tire by using a test piece of the same rubber as that of a tire tread, which is a method of testing rubber wear in which, while a disk-shaped sample 3 and a disk-shaped grinding wheel 1 are rotated at individually predetermined numbers of rotations, the sample 3 is pressed on the outer periphery of the grinding wheel 1. A pressing load is applied to the sample 3 such that a contact pressure when the sample is pressed on the outer periphery of the grinding wheel 1 and a contact pressure at a site related to the evaluation of rubber wear of tread are the same.
摘要:
Provided is a method of testing rubber wear in which a wear phenomenon occurred in a tire can be precisely reproduced in a sample, and a method of calculating the rubber index of a tire using the method of testing rubber wear.Also provided is a test method for predicting the anti-wear properties of a tire by using a test piece of the same rubber as that of a tire tread, which is a method of testing rubber wear in which, while a disk-shaped sample 3 and a disk-shaped grinding wheel 1 are rotated at individually predetermined numbers of rotations, the sample 3 is pressed on the outer periphery of the grinding wheel 1. A pressing load is applied to the sample 3 such that a contact pressure when the sample is pressed on the outer periphery of the grinding wheel 1 and a contact pressure at a site related to the evaluation of rubber wear of tread are the same.
摘要:
A method of manufacturing a rubber hose that includes an inner rubber tube having a hollow portion, first and second braided layers formed by braiding strands, and an outer rubber tube. The method includes forming a laminated structure by sequentially forming the first braided layer on the inner rubber tube, a thermoplastic resin layer including a thermoplastic resin on the first braided layer, the second braided layer on the thermoplastic resin layer and the outer rubber tube on the second braided layer, vulcanizing the inner rubber tube and the outer rubber tube and softening the thermoplastic resin layer by heating the laminated structure to not lower than a softening temperature of the thermoplastic resin layer, and integrating the first and second braided layers by softening the thermoplastic resin layer and then solidifying the soft thermoplastic resin penetrated into mesh openings formed between the strands.
摘要:
In order to precisely calculate the rubber index of a tire, a rubber index calculating device: measures, by a frictional energy measuring device, frictional energies of a tire in plural tire input conditions applied to the tire on the basis of the shear force and the slippage of a tire contact patch; measures, by the frictional energy measuring device, frictional energies of a sample of the same material as the tire in sample input conditions that have been set on the basis of the frictional energies of the tire in the tire input conditions that were measured, and sets measurement conditions for measuring amounts of wear of the sample on the basis of the frictional energies of the tire in the tire input conditions that were measured and the frictional energies of the sample in the tire input conditions that were measured; measures, by an amount of wear measuring device, the amounts of wear of the sample in the measurement conditions that were set, and calculates the rubber index of the tire on the basis of the frictional energies and the amounts of wear of the sample that were measured.
摘要:
The present invention provides a oxazole compound represented by Formula (1), or a salt thereof: wherein R1 is an aryl group which may have one or more substituents; R2 is an aryl group or a nitrogen atom-containing heterocyclic group each of which may have one or more substituents; and W is a divalent group represented by —Y1-A1- or —Y2—C(═O)— wherein Y1 is a group such as —C(═O)—, A1 is a group such as a lower alkylene group, and Y2 is a group such as a piperazinediyl group. The oxazole compound has a specific inhibitory action against phosphodiesterase 4.
摘要:
To precisely calculate the rubber index of a tire.A rubber index calculating device measures, by a frictional energy measuring device, frictional energies of a tire in plural tire input conditions applied to the tire on the basis of the shear force and the slippage of a tire contact patch, measures, by the frictional energy measuring device, frictional energies of a sample of the same material as the tire in sample input conditions that have been set on the basis of the frictional energies of the tire in the tire input conditions that were measured, and sets a measurement conditions for measuring amounts of wear of the sample on the basis of the frictional energies of the tire in the tire input conditions that were measured and the frictional energies of the sample in the tire input conditions that were measured, measures, by an amount of wear measuring device, the amounts of wear of the sample in the measurement conditions that were set, and calculates the rubber index of the tire on the basis of the frictional energies and the amounts of wear of the sample that were measured.
摘要:
The present invention provides a oxazole compound represented by Formula (1), or a salt thereof: wherein R1 is an aryl group which may have one or more substituents; R2 is an aryl group or a nitrogen atom-containing heterocyclic group each of which may have one or more substituents; and W is a divalent group represented by —Y1-A1- or —Y2—C(═O)— wherein Y1 is a group such as —C(═O)—, A1 is a group such as a lower alkylene group, and Y2 is a group such as a piperazinediyl group. The oxazole compound has a specific inhibitory action against phosphodiesterase 4.