Steel cord and conveyor belt
View Patent ↗A rubber-reinforcing steel cord embedded in a rubber product has a stranded structure including a core strand, and a plurality of sheath strands intertwined around an outer circumferential surface of the core strand; wherein a lubricant is provided between wires that constitute the core strand.
1. A rubber-reinforcing steel cord embedded in a rubber product, the steel cord comprising:
a stranded structure including:
a core strand comprising wires, and
a plurality of sheath strands intertwined around an outer circumferential surface of the core strand; wherein
a lubricant is provided between the wires that constitute the core strand.
2. The steel cord according to claim 1 , wherein the lubricant is provided between wires that constitute at least one sheath strand of the plurality of sheath strands.
3. The steel cord according to claim 2 , wherein an outer circumference of the strand having the lubricant provided between the wires is covered with an adhesive layer.
4. A conveyor belt, comprising:
a plurality of the steel cord described in claim 2 embedded arranged side by side serving as cores;
an unvulcanized upper rubber cover disposed above the cores and an unvulcanized lower rubber cover disposed below the cores; wherein
the upper rubber cover and the lower rubber cover with the cores disposed therebetween are vulcanized to manufacture the conveyor belt.
5. The steel cord according to claim 1 , wherein an outer circumference of the strand having the lubricant provided between the wires is covered with an adhesive layer.
6. The steel cord according to claim 5 , wherein wires that constitute the core strand and the sheath strands have a shaping ratio of 85% or greater.
7. A conveyor belt, comprising:
a plurality of the steel cord described in claim 5 embedded arranged side by side serving as cores;
an unvulcanized upper rubber cover disposed above the cores and an unvulcanized lower rubber cover disposed below the cores; wherein
the upper rubber cover and the lower rubber cover with the cores disposed therebetween are vulcanized to manufacture the conveyor belt.
8. The steel cord according to claim 1 , wherein wires that constitute the core strand and the sheath strands have a shaping ratio of 85% or greater.
9. The steel cord according to claim 8 , wherein the lubricant has a kinematic viscosity at 100° C. from 54.0 mm 2 /s to 64.0 mm 2 /s, both inclusive.
10. A conveyor belt, comprising:
a plurality of the steel cord described in claim 8 embedded arranged side by side serving as cores;
an unvulcanized upper rubber cover disposed above the cores and an unvulcanized lower rubber cover disposed below the cores; wherein
the upper rubber cover and the lower rubber cover with the cores disposed therebetween are vulcanized to manufacture the conveyor belt.
11. The steel cord according to claim 1 , wherein the lubricant has a kinematic viscosity at 100° C. from 54.0 mm 2 /s to 64.0 mm 2 /s, both inclusive.
12. A conveyor belt, comprising:
a plurality of the steel cord described in claim 11 embedded arranged side by side serving as cores;
an unvulcanized upper rubber cover disposed above the cores and an unvulcanized lower rubber cover disposed below the cores; wherein
the upper rubber cover and the lower rubber cover with the cores disposed therebetween are vulcanized to manufacture the conveyor belt.
13. A conveyor belt, comprising:
a plurality of the steel cord described in claim 1 embedded arranged side by side serving as cores;
an unvulcanized upper rubber cover disposed above the cores and an unvulcanized lower rubber cover disposed below the cores; wherein
the upper rubber cover and the lower rubber cover with the cores disposed therebetween are vulcanized to manufacture the conveyor belt.