66results about How to "Improve tire performance" patented technology

The present invention relates to a rubber composition comprising at least one rubber component, between about 50 phr and about 120 phr of a filler, wherein at least 20 phr of the filler is a high surface area carbon black. Further, the composition comprises between 10 phr and 30 phr of a phenolic resin. The present invention is further directed to a tire tread or a tire comprising such a composition.

In a non-pneumatic tire, central portions in an extension direction of first elastic connecting plates (21) and central portions in an extension direction of second elastic connecting plates (22) are spaced from each other in a tire width direction (H) by a distance of 0.25 to 0.9 times an outer tube width (W1) serving as a size in the tire width direction (H) of an outer tubular body (13), edges of a first side in the tire width direction (H) of first end portions (21a) of the first elastic connecting plates (21) are disposed at the same positions in the tire width direction (H) as edges of the first side in the tire width direction (H) of the outer tubular body (13) or disposed inside in the tire width direction (H) of the edge of the first side in the tire width direction (H) of the outer tubular body (13) within a distance of 0.1 times the outer tube width (W1) or less, and edges of a second side in the tire width direction (H) of first end portions (22a) of the second elastic connecting plates (22) are disposed at the same positions in the tire width direction (H) as an edge of the second side in the tire width direction (H) of the outer tubular body (13) or disposed inside in the tire width direction (H) of the edge of the second side in the tire width direction (H) of the outer tubular body (13) within a distance of 0.1 times the outer tube width (W1) or less.

In the pneumatic tire in which not less than three main grooves 1 extending in the tire circumferential direction R are formed and ribs 2 are formed by the main grooves 1, upper edges 11 of the main groove 1 when the tire is new extend in a linear manner in the tire circumferential direction R, the bottom 12 of the main groove 1 extends in a zigzag manner in the tire circumferential direction R, the sidewalls 13 of the main groove 1 is provided with concave portions and convex portions, and in the concave portion of at least one of the sidewalls 13 of the main groove 1, the protrusions 3 that is joined to the bottom 12 of the main groove 1 and to the sidewall 13. Further, the pneumatic tire may be provided with sipes or notches that extend from the concave portion to the inner side of the rib 2 in the tire width direction.

The present invention is directed at a tire design, which allows for proper operational characteristics in all operating conditions, and is not dependent on pneumatic pressurization. The tire is mounted in a wheel rim, and comprises an integral homogeneous toroidal body having a pair of spaced-apart radially extending sidewalls and a cross member. Each sidewall has a first and a second end and an internal face and an external face, with the second end of each of the sidewalls integrally merging into the cross member. A set of rim-engaging surfaces at the first end of each of the sidewalls allows effective mounting to conventional tire rims. An annular chamber is defined by the internal faces of the sidewalls and an internal top wall on the cross member opposite the at least one road engaging surface. The set of rim-engaging surfaces includes a lobe-like portion at the first end of each of the sidewalls, the respective lobe-like projections may be separable when the tire is not mounted on the rim, but being compressed into engagement when the tire is mounted in the rim, thereby closing the annular chamber, or integral with one another to form the enclosed chamber.

A tire has a tread with a plurality of ground engaging tread elements. In at least one of the tread elements is a sipe having a depth in the radial direction of the tire. The sipe has a crossed configuration comprised of two sipes. At least one of the sipes of the crossed sipe has a radially outer portion having three dimensional elements and a radially innermost portion have a substantially linear configuration. A blade useful for manufacturing the sipe has a crossed blade configuration with a configuration corresponding to the formed sipe.

An object of the present invention aims to provide a cord formed by twisting purified polysaccharide fibers which are manufactured by using a raw material with a low environmental impact and do not emit carbon disulfide, in which the cord is able to confer durability and resistance to external damage to a tire when the cord is used in the tire. A cord is provided formed by bringing a polysaccharide solution which is formed by dissolving a polysaccharide raw material in a liquid including an ionic liquid in contact with a solidifying liquid, and by twisting raw yarn which is purified polysaccharide fibers formed by spinning polysaccharides, in which a relationship between tenacity TB (cN / dtex) of the raw yarn at 25°C and elongation at break EB (%) of the raw yarn at 25°C satisfies the following expression (1) and the following expression (2), and a twisted yarn tenacity utilization rate (CT / TB) at the time of setting cord tenacity at 25°C to CT (cN / dtex) when the raw yarn is twisted to be a cord is greater than or equal to 70%.

Disclosed is a pneumatic tire which is allowed to increase block stiffness not only during braking and driving but also during cornering, and is allowed thereby to compatibly enhance tire performances both during braking and driving and during cornering. The pneumatic tire of the present invention is one where a plurality of longitudinal grooves extending in a tire circumferential direction and a plurality of lateral grooves extending in a tire widthwise direction are provided in a tread portion, a plurality of blocks are defined by these longitudinal and lateral grooves, and a plurality of sipes extending in the tire widthwise direction are provided to each of the blocks, wherein, with regard to each of the sipes, a zigzag shape is formed on a tread surface, bent portions ranging in the tire widthwise direction while bent in the tire circumferential direction are formed inside the block at at least two positions in the tire radial direction, and a zigzag shape with an amplitude in the tire radial direction is formed in each of the bent portions.

In a pneumatic tire, a belt layer includes six superposed belt members. The edge of the fourth belt member on the tire-width direction outer side and the edge of the sixth belt member on the tire-width direction outer side are at approximately the same position in a tire width direction.

The present invention provides a production method for purified polysaccharide fibers in which carbon disulfide emission is suppressed while efficiently producing purified polysaccharide fibers having excellent strength, purified polysaccharide fibers produced by using the production method, a fiber-rubber complex using the purified polysaccharide fibers, and a tire having excellent tire characteristics using the fiber-rubber complex. The production method for purified polysaccharide fibers of the present invention is a production method for purified polysaccharide fibers of wet-spinning or dry-wet-spinning polysaccharide by bringing a polysaccharide solution obtained by dissolving a polysaccharide raw material in a liquid including an ionic liquid into contact with a solidification liquid including an ionic liquid, in which a concentration of the ionic liquid in the solidification liquid is 0.4% by weight to 50% by weight and the anionic moieties of the ionic liquid in the polysaccharide solution and the ionic liquid in the solidification liquid have one or more types selected from the group consisting of a phosphinate ion, a phosphate ion, and a phosphonate ion.