CN-116964269-B - Composite sheet and steel wire

Abstract

A composite sheet comprising a rubber sheet and a plurality of steel wires embedded in the rubber sheet, wherein the plurality of steel wires are arranged in a row in the width direction of the rubber sheet, the cross section of each steel wire orthogonal to the longitudinal direction is a flat cross section, the ratio L2/L1 of the length L1 of the flat cross section in the long axis direction to the length L2 of the flat cross section in the short axis direction is 0.230 or more and 0.620 or less, the area of the flat cross section is 0.045mm 2 or more and 0.140mm 2 or less, the interval between two steel wires adjacent in the side-by-side direction is 0.100mm or more and 0.700mm or less, and each steel wire is arranged such that the long axis direction is along the width direction of the rubber sheet.

Inventors

• NAKAJIMA TETSUYA
• MATSUOKA AKIFUMI
• Zhen Guo Xian

Assignees

• 住友电气工业株式会社

Dates

Publication Date

20260505

Application Date

20220209

Priority Date

20210614

Claims (3)

1. 1. A composite sheet comprising a rubber sheet and a plurality of steel wires embedded in the rubber sheet, The plurality of steel wires are arranged in a row in the width direction of the rubber sheet, The cross section of each steel wire orthogonal to the length direction is a flat cross section, The flat section has a first side, a second side, a third side and a fourth side connected clockwise, The first side and the third side are straight lines along the long axis direction of the flat section, The second side and the fourth side are circular arcs, The ratio L2/L1 of the length L1 of the flat section in the long axis direction to the length L2 of the flat section in the short axis direction is 0.259 to 0.290, The area of the flat section is more than 0.100mm 2 and less than 0.138mm 2 , The interval between two adjacent steel wires in the side-by-side direction is more than 0.100mm and less than 0.700mm, Each of the steel wires is arranged such that the long axis direction is along the width direction of the rubber sheet.
2. 2. The composite sheet according to claim 1, wherein, The interval is 0.105mm or more and 0.675mm or less.
3. 3. A steel wire having a flat cross section orthogonal to the longitudinal direction, wherein, The flat section has a first side, a second side, a third side and a fourth side connected clockwise, The first side and the third side are straight lines along the long axis direction of the flat section, The second side and the fourth side are circular arcs, The ratio L2/L1 of the length L1 of the flat section in the long axis direction to the length L2 of the flat section in the short axis direction is 0.259 to 0.290, The area of the flat section is 0.100mm 2 or more and 0.138mm 2 or less.

Description

Composite sheet and steel wire Technical Field The present disclosure relates to composite sheets and steel wires. The present application claims priority based on japanese patent application No. 2021-098515, 6.14 of 2021, and incorporates all of the descriptions described in the above japanese patent application. Background For example, composite sheets are known as constituent materials of tires, hoses, conveyor belts, armrests, or air springs. The composite sheet includes a rubber sheet and a plurality of steel wires embedded in the rubber sheet. For example, patent document 1 discloses a steel wire embedded in a tire. The steel wire of patent document 1 has a flat cross section. The steel wire having a flat section can improve the filling rate of the steel wire in the composite sheet as compared with the steel wire having a circular section. Prior art literature Patent literature Patent document 1 Japanese patent laid-open No. 2006-336154 Disclosure of Invention The composite sheet of the present disclosure includes a rubber sheet and a plurality of steel wires embedded in the rubber sheet, the plurality of steel wires are aligned in a row in a width direction of the rubber sheet, a cross section of each steel wire orthogonal to a longitudinal direction is a flat cross section, a ratio L2/L1 of a length L1 of the flat cross section in a long axis direction to a length L2 of the flat cross section in a short axis direction is 0.230 or more and 0.620 or less, an area of the flat cross section is 0.045mm 2 or more and 0.140mm 2 or less, an interval between two steel wires adjacent in a side-by-side direction is 0.100mm or more and 0.700mm or less, and each steel wire is arranged such that the long axis direction is along the width direction of the rubber sheet. The steel wire of the present disclosure is a steel wire having a cross section orthogonal to a longitudinal direction, which is a flat cross section, wherein a ratio L2/L1 of a length L1 of the flat cross section in a major axis direction to a length L2 of the flat cross section in a minor axis direction is 0.250 or more and 0.300 or less, and an area of the flat cross section is 0.045mm 2 or more and 0.140mm 2 or less. Drawings Fig. 1 is a schematic perspective view of a composite sheet according to an embodiment. Fig. 2 is a schematic partial cross-sectional view of a composite sheet according to an embodiment. Fig. 3 is a schematic view of the test machine shown in the test example. Detailed Description [ Problem to be solved by the present disclosure ] The composite sheet is required to have a predetermined flexibility with respect to bending in the thickness direction and a predetermined rigidity with respect to bending in the width direction. For example, in the case of using the composite sheet for a tire, flexibility in the thickness direction may increase riding comfort of the vehicle, and rigidity in the width direction may increase steering stability of the vehicle. An object of the present disclosure is to provide a composite sheet having a predetermined flexibility with respect to bending in a thickness direction and a predetermined rigidity with respect to bending in a width direction. Further, it is an object of the present disclosure to provide a steel wire suitable for composite sheets. [ Effect of the present disclosure ] The composite sheet of the present disclosure has a predetermined flexibility with respect to bending in the thickness direction and a predetermined rigidity with respect to bending in the width direction. The steel wire of the present disclosure is suitable for producing a composite sheet having a predetermined flexibility with respect to bending in the thickness direction and a predetermined rigidity with respect to bending in the width direction. [ Description of embodiments of the present disclosure ] Hereinafter, embodiments of the present disclosure will be described. The composite sheet of the embodiment of the invention is provided with a rubber sheet and a plurality of steel wires embedded in the rubber sheet, wherein the plurality of steel wires are aligned in a row in the width direction of the rubber sheet, the cross section of each steel wire orthogonal to the longitudinal direction is a flat cross section, the ratio L2/L1 of the length L1 of the flat cross section in the long axis direction to the length L2 of the flat cross section in the short axis direction is 0.230 or more and 0.620 or less, the area of the flat cross section is 0.045mm 2 or more and 0.140mm 2 or less, the interval between two steel wires adjacent in the side-by-side direction is 0.100mm or more and 0.700mm or less, and each steel wire is arranged such that the long axis direction is along the width direction of the rubber sheet. The composite sheet of the embodiment has a predetermined flexibility against bending in the thickness direction of the rubber sheet. This is because each wire is arranged such that the long axis direct