摘要:
A tire improving electric conductivity and rolling resistance performance is provided. A tire wherein an inherent resistance value is at least 109 Ω·cm and the amount ratio of silica in a reinforcing filler is at least 70% by weight in a tread part, a sidewall part, a breaker part or a ply part, further having a conductive rubber layer together with the tire parts, wherein the conductive rubber layer is (a) a conductive rubber layer which contacts with a bead part and is continuously arranged to the ground contact surface of the tread part through between the sidewall part and the ply part, having an inherent resistance value of at most 108 Ω·cm and a thickness of 0.1 to 5 mm, or (b) a conductive rubber layer which contacts with a bead part and is continuously arranged between the sidewall part and the ply part and between the tread part and the breaker part or in the tread part, having an inherent resistance value of at most 108 Ω·cm and a thickness of 0.1 to 5 mm.
摘要:
The objective of the present invention is to provide a pneumatic tire that can desirably prevent generation of static electricity between the road face and the tire, while maintaining a low rolling resistance, so that the safety in use is further improved. In pneumatic tire of the present invention, each of tread rubber, breaker rubber and sidewall rubber that are respectively formed on a tread section, a breaker section and a sidewall section has a volume resistivity of 1×108 Ω·cm or more, with a conductive layer having a volume resistivity smaller than 1×108 Ω·cm and a thickness in a range from 0.2 to 2.0 mm being formed between a carcass ply forming the carcass and the sidewall rubber, and at least either conductive layer or a rubber cement layer that is formed so as to be made in contact with conductive layer and has a volume resistivity lower than that of the tread rubber is exposed to the surface of the tire.
摘要:
A rubber composition for coating a steel cord, in which processability, durability and adhesive condition can be improved with favorable balance, and a tire using the rubber composition are provided. The rubber composition for coating a steel cord comprises 40 to 70 parts by weight of silica having a nitrogen adsorbing-specific surface area of 100 to 200 m2/g, 1 to 15 parts by weight of a silane coupling agent, 12 to 20 parts by weight of zinc oxide, 3.5 to 5 parts by weight of sulfur, and an organic cobalt in an amount of 0.05 to 0.3 part by weight, converted into metal cobalt amount, on the basis of 100 parts by weight of a rubber component, and a tire is prepared using the rubber composition.
摘要:
The present invention provides a rubber composition for coating a textile cord, and a tire using the rubber composition, wherein rolling resistance is lowered, and processability and rubber strength are excellent, as compared with a rubber composition for coating a textile cord comprising raw materials derived from petroleum resources as a main component, and a tire using the rubber composition, while considering environments and providing for the future decrease in petroleum resources supply. The rubber composition for coating a textile cord comprises 25 to 80 parts by mass of silica and 1 to 15 parts by mass of a silane coupling agent on the basis of 100 parts by mass of a diene rubber, wherein a nitrogen adsorbing-specific surface area of said silica is 70 to 150 m2/g.
摘要:
A rubber composition for an inner liner improving rolling resistance performance of a tire and further improving processability is provided. A rubber composition for an inner liner comprising at least 30 parts by weight of silica having a BET specific surface area of less than 150 m2/g and at most 5 parts by weight or less of carbon black based on 100 parts by weight of a rubber component comprising a natural rubber and a tire having an inner liner comprising the same.
摘要:
There is provided a rubber composition for a side wall, wherein an amount ratio of resources other than petroleum are increased so as to be ecological and take measures for the decrease in supply of petroleum in the future, which further has excellent flex crack resistance and strength. A rubber composition for a side wall comprising 20 to 60 parts by weight of silica based on 100 parts by weight of a rubber component comprising 40 to 80 % by weight of a natural rubber and 60 to 20 % by weight of at least one rubber selected from the group consisting of a butadiene rubber, a styrene-butadiene rubber and an epoxidized natural rubber, and 4 to 16 parts by weight of a silane compound represented by the following formula: Xn—Si—Y4-n(wherein X represents an ethoxy group or a methoxy group, and Y represents a phenyl group or an alkyl group) based on 100 parts by weight of silica.
摘要:
The present invention relates to a rubber composition for a sidewall, in which an effect on environments can be taken into consideration, provision for the future decrease of petroleum supply can be satisfied, and further, tear strength and flex crack growth resistance can be improved with favorable balance without increasing hardness, and a process for preparing the rubber composition. The rubber composition for a sidewall is characterized by comprising 15 to 60 parts by weight of silica and 2 to 20 parts by weight of a double bond-containing plasticizer on the basis of 100 parts by weight of a rubber component comprising 30 to 80% by weight of a natural rubber and 20 to 70% by weight of an epoxidized natural rubber.
摘要:
The present invention provides a rubber composition for coating a textile cord, and a tire using the rubber composition, wherein rolling resistance is lowered, and processability and rubber strength are excellent, as compared with a rubber composition for coating a textile cord comprising raw materials derived from petroleum resources as a main component, and a tire using the rubber composition, while considering environments and providing for the future decrease in petroleum resources supply. The rubber composition for coating a textile cord comprises 25 to 80 parts by mass of silica and 1 to 15 parts by mass of a silane coupling agent on the basis of 100 parts by mass of a diene rubber, wherein a nitrogen adsorbing-specific surface area of said silica is 70 to 150 m2/g.
摘要:
There is provided a rubber composition in which strength and weather resistance are improved and the use of petroleum resource is suppressed as much as possible, and a tire comprising thereof. A rubber composition comprising 3 to 12 parts by weight of a pigment derived from resources other than petroleum, 10 parts by weight or less of carbon black and 30 parts by weight or more of silica based on 100 parts by weight of rubber components comprising an epoxidized natural rubber and/or a natural rubber.
摘要:
The present invention can provide the rubber composition for a carcass ply and/or a belt, which comprises a rubber component comprising 30 to 90% by weight of a natural rubber and 10 to 70% by weight of an epoxidized natural rubber and a filler containing not less than 80% by weight of silica, has adhesion as favorably compared with a rubber composition mainly comprising raw materials derived from non-petroleum resources, and makes it possible to reduce an adverse effect on environment and provide for the future decrease of petroleum supply, the carcass ply and/or the belt using the same composition, and the preparation process of the same composition. It is preferable that the process for preparing the rubber composition for a carcass ply and/or a belt comprises a step (1) of kneading the natural rubber and silica and a step (2) of kneading the kneaded product discharged in the step (1) and the epoxidized natural rubber.