Cord for elastomer reinforcement use
Provided is an elastomer reinforcement cord with improved rust inhibition. An elastomer reinforcement cord ( 10 ) includes metal filaments and a polymer material. The elastomer reinforcement cord ( 10 ) has a multi-strand structure which includes: at least one core strand ( 21 ) formed by twisting plural metal filaments ( 1 a ) and ( 1 b ) together; and two or more sheath strands ( 22 ) each formed by twisting plural metal filaments ( 11 a ) and ( 11 b ) together, and in which the sheath strands are twisted together around the core strand. In a region surrounded by a line connecting the centers of the metal filaments constituting the outermost sheath layer of the core strand at a cross-section in a direction orthogonal to an axial direction after vulcanization of the core strand, when a region occupied by other than the metal filaments is defined as a gap region, a filling rate, which is a ratio of the area of the polymer material with respect to the gap region, is 52% to 120%.
1. An elastomer reinforcement cord, comprising metal filaments and a polymer material,
wherein
the elastomer reinforcement cord has a multi-strand structure which comprises: at least one core strand formed by twisting plural metal filaments together; and two or more sheath strands each formed by twisting plural metal filaments together, and in which the sheath strands are twisted together around the core strand, and
in a region surrounded by a line connecting the centers of the metal filaments constituting the outermost sheath layer of the core strand at a cross-section in a direction orthogonal to an axial direction after vulcanization of the core strand, when a region occupied by other than the metal filaments is defined as a gap region, a filling rate, which is a ratio of the area of the polymer material with respect to the gap region, is 52% to 120%, and
wherein a distance between the metal filaments constituting the outermost sheath layer of the core strand is 20 μm or less.
2. The elastomer reinforcement cord according to claim 1 , wherein the polymer material has a melting point or softening point of 80° C. to 160° C.
3. The elastomer reinforcement cord according to claim 2 , wherein the polymer material is not contained in the sheath strands.
4. The elastomer reinforcement cord according to claim 3 , wherein a distance between the metal filaments constituting the outermost sheath layer of each of the sheath strands is larger than 20 μm.
5. The elastomer reinforcement cord according to claim 3 , which is formed by twisting the metal filaments with resin filaments containing the polymer material.
6. The elastomer reinforcement cord according to claim 2 , wherein a distance between the metal filaments constituting the outermost sheath layer of each of the sheath strands is larger than 20 μm.
7. The elastomer reinforcement cord according to claim 2 , which is formed by twisting the metal filaments with resin filaments containing the polymer material.
8. The elastomer reinforcement cord according to claim 1 , wherein the polymer material is not contained in the sheath strands.
9. The elastomer reinforcement cord according to claim 8 , wherein a distance between the metal filaments constituting the outermost sheath layer of each of the sheath strands is larger than 20 μm.
10. The elastomer reinforcement cord according to claim 8 , which is formed by twisting the metal filaments with resin filaments containing the polymer material.
11. The elastomer reinforcement cord according to claim 1 , wherein a distance between the metal filaments constituting the outermost sheath layer of each of the sheath strands is larger than 20 μm.
12. The elastomer reinforcement cord according to claim 11 , which is formed by twisting the metal filaments with resin filaments containing the polymer material.
13. The elastomer reinforcement cord according to claim 1 , which is formed by twisting the metal filaments with resin filaments containing the polymer material.