66results about How to "Wet performance" patented technology

The present invention provides a waterproofing membrane for use on inclined surfaces. The membrane is fabricated from one or more layers of flexible sheet material preferably consisting of woven or nonwoven synthetic polymers of polypropylene. The membrane has a top surface and a bottom surface, where the bottom surface is intended to face the inclined surface. A skid resistant pattern of polymer elements is applied to the top surface of the membrane. The polymer has a Tensile Modulus <15 MPa (ASTM D638, 23C, 50 mm / min), a Tensile Yield Elongation >50% (ASTM D638, 23C, 50 mm / min, and a Shore A Hardness (ASTM D2240, 23C, 0 sec)<90. In a preferred embodiment the polymer elements are made from polyvinyl chloride polymer with a Tensile Modulus <7 MPa (ASTM D638, 23C, 50 mm / min), a Tensile Yield Elongation >50% (ASTM D638, 23C, 50 mm / min, and a Shore A Hardness (ASTM D2240, 23C, 0 sec)<75. The pattern of polymer elements may be applied directly on the top surface of the membrane or produced on one side of a carrier sheet which is attached to the top surface of the membrane. Where a carrier sheet is utilized, the carrier sheet is comprised of woven or nonwoven materials selected from the group consisting of synthetic polymers of polyethylene(PE), polypropylene (PP), polyethyleneterephthalate (PET), nylon, or copolymers and blends thereof, as well as glass or cotton, or blends thereof. In a preferred embodiment the carrier sheet is comprised of woven or nonwoven polypropylene (PP) or polyethyleneterephthalate (PET).

It is an object of the present invention to provide a tire rubber composition and a pneumatic tire produced using the rubber composition, which improve mechanical strength, abrasion resistance, rolling resistance, wet grip performance, and dry grip performance in good balance. The present invention relates to a tire rubber composition comprising: a rubber component that contains a modified diene rubber; and a silica component that contains a silica surface-treated with a silane coupling agent, wherein the amount of the modified diene rubber in 100% by mass of the rubber component is 15% by mass or more, and the dispersion ratio of the silica component is 70% or higher.

The present invention has its object to provide a rubber composition for a tread which can prevent reversion and can also achieve environmental performance (excellent rolling resistance, response to depletion of oil resources, attention to CO2 emission), wet grip performance, dry grip performance, handling stability, and durability (abrasion resistance, crack resistance) in a well-balanced manner. The present invention also aims to provide a pneumatic tire using the rubber composition for the tread thereof. The rubber composition for a tread includes a rubber component containing 35% by mass or more of an epoxidized natural rubber; and a white filler, wherein a total sulfur content is less than 1.75% by mass, and a crosslink density is 7.0×10−5 mol / cm3 or more.

A pneumatic tire includes a plurality of circumferential grooves and a first land portion. The circumferential grooves extend continuously in a tire circumferential direction. The first land portion extends in the tire circumferential direction between a pattern end and one of the circumferential grooves in a shoulder region located outside the circumferential grooves in a tire width direction. The first land portion has first lug grooves extending from the pattern end in the tire width direction and closed without communicating with the circumferential grooves are arranged in the tire circumferential direction. At least one circumferential groove is wave-shaped with a constant groove width in the tire width direction at a tread surface and formed in a wave shape in the circumferential direction at the tread surface and groove bottom. The wave-shaped circumferential groove has a shorter cycle length of waves at the groove bottom than at the tread surface.

An ultrasonic flow meter comprises a cavity disposed in the wall of a flow tube. This cavity is preferably elongated along a direction perpendicular to a flow axis and has a flat interior surface portion proximal an interior surface of a wall of the flow tube. A piezoelectric transducer has a surface bonded to the flat interior surface portion of the cavity so as to transmit and receive acoustic signals through a thin window in the wall of the flow tube. An encapsulant, which may be combined with other elements, such as a mechanical strengthening piece, bonds the second side of the piezoelectric wafer to a second surface of the cavity. In a particular preferred embodiment, the cavity may be a dovetailed groove cut into a wall of the flow tube.