2 + M + N steel cord with high glue permeation performance

Abstract

The utility model belongs to the technical field of steel wire cords, and particularly relates to a 2 + M + N steel cord with high glue permeation performance, which comprises 2 + M + N (M = 3-5, and N = 10-18). The steel cord comprises two d first layer core wire steel wires with the diameter of d0, M (M = 3-5) second layer middle layer steel wires with the diameter of d1, and N (N = 10-18) third layer outer layer steel wires with the diameter of d2. The second layer of middle layer steel wires incompletely wrap the surfaces of the two first layer of core wire steel wires and are woven and twisted around the first layer of core wire steel wires to form a core strand. And the third layer of outer-layer steel wires are twisted around the core strand. And the twisting direction of the core strand is opposite to that of the third-layer outer-layer steel wire. The lay length of the outer layer steel wire of the third layer is p1, and the lay length of the middle layer steel wire of the second layer is p2 and p2lt; p1, the first layer of core wire steel wire has no lay length. According to the 2 + M + N steel cord with the high rubber permeation performance, gaps are reserved between the core strand steel wires (the first layer of core wire steel wires and the second layer of middle layer steel wires) and between the third layer of outer layer steel wires, rubber can permeate into the gaps of the core strand steel wires fully, air residues between the core strand steel wires are reduced, the corrosion resistance and fatigue resistance of a tire are improved, and the service life of the tire is prolonged. The bonding performance and the bonding retention are improved, and the service life of the tire is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to steel cord technology field, concretely is a 2+M+N high permeability glue performance steel cord. BACKGROUND

[0002] Steel cord is the main skeleton material of radial tire and the main stress component of radial tire, and is mainly used for car tires, light truck tires, heavy truck tires, engineering machinery vehicle tires and the like. The steel cord has the advantages of long service life, puncture resistance, good elasticity, safety and comfort, fuel saving and the like. The structure, strength, bending stiffness, adhesion, permeability and the like of the steel cord have a direct influence on the performance of the tire.

[0003] The prior art has the following disadvantages: the current tight steel cord has a too tight structure, so that the gap between the layers of the steel cord is small, and when vulcanizing with rubber, the rubber cannot completely permeate into the middle layer steel wire of the steel cord. This causes high air content in the inner layer of the steel cord, easy rust of the steel wire, and reduces the corrosion resistance, fatigue resistance, impact resistance and adhesion retention of the steel cord, and affects the quality of the tire and reduces the service life of the tire. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the utility model provides a 2+M+N high permeability glue performance steel cord to solve the problems in the background art.

[0005] To achieve the above object, the utility model provides the following technical scheme: a 2+M+N high permeability glue performance steel cord, comprising a steel cord, the steel cord comprising first layer core wire steel wires, second layer middle layer steel wires and third layer outer layer steel wires, the steel cord being of a 2+M+N structure, wherein M=3-5 and N=10-18, the steel cord comprising two first layer core wire steel wires with a diameter d0, M (M=3-5) second layer middle layer steel wires with a diameter d1 and N (N=10-18) third layer outer layer steel wires with a diameter d2.

[0006] As a preferred technical scheme of the utility model: the second layer middle layer steel wires are not completely wrapped around the surfaces of the two first layer core wire steel wires and are twisted around the first layer core wire steel wires to form a core strand, and the third layer outer layer steel wires are twisted around the core strand to form the steel cord.

[0007] As a preferred technical scheme of the utility model: the third layer outer layer steel wires are twisted in a direction opposite to the twisting direction of the core strand, the core strand is in a Z direction, and the third layer outer layer steel wires are in an S direction, or vice versa, the core strand is in an S direction, and the third layer outer layer steel wires are in a Z direction.

[0008] As a preferred technical scheme of the utility model: the third layer outer layer steel wire's lay length is p1, p1=10mm~20mm;The second layer intermediate layer steel wire's lay length is p2, and p2<p1;P2=5mm~18mm, the first layer core wire steel wire is without lay length.

[0009] As a preferred technical scheme of the utility model: the first layer core wire steel wire diameter d0 is 0.15mm~0.40mm.

[0010] As a preferred technical scheme of the utility model: the second layer intermediate layer steel wire diameter d1 is 0.15mm~0.40mm.

[0011] As a preferred technical scheme of the utility model: the third layer outer layer steel wire diameter d2 is 0.15mm~0.30mm;

[0012] As a preferred technical scheme of the utility model: the first layer core wire steel wire, second layer intermediate layer steel wire, third layer outer layer steel wire's strength grade is ordinary intensity NT, high intensity HT, super high intensity ST, extra high intensity UT or very high intensity MT.

[0013] Compared with the prior art, the utility model provides a kind of 2+M+N high penetration performance steel cord, with following beneficial effects:

[0014] The 2+M+N high penetration performance steel cord, by setting first layer core wire steel wire, second layer intermediate layer steel wire, third layer outer layer steel wire, using the steel cord of 2+M+N (M=3~5, N=10-18) structure, intermediate steel wire does not completely wrap core wire, so that steel cord is when with rubber vulcanization, make rubber penetrate into the gap between each layer steel wire of steel cord. Improve the penetration of rubber, so that rubber can embed around each cord steel wire, thereby reduce the air content of inner layer of steel cord, improve the corrosion resistance, fatigue resistance, impact resistance and adhesive retention of steel cord etc. Improve tire quality, prolong the service life of tire. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the cross section schematic view of 2+M+N structure high penetration performance steel cord for radial tire provided by the utility model embodiment one;

[0016] Figure 2 It is the cross section schematic view of 2+M+N structure high penetration performance steel cord for radial tire provided by the utility model embodiment two.

[0017] In the drawing: 11, steel cord;22, first layer core wire steel wire;33, second layer intermediate layer steel wire;44, third layer outer layer steel wire. DETAILED DESCRIPTION

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-2 In this embodiment: a 2+M+N high-permeability steel cord, the steel cord comprising two first-layer core wires 22 with a diameter of d0, and a second-layer intermediate wire 33 having three ( Figure 1 ) or 5 ( Figure 2 ) There are 11 steel wires of the same diameter d1 and the third outer layer steel wire 44. Figure 1 ) or 12 ( Figure 2 ) Steel wires with the same diameter d2.

[0020] Two wet-drawn steel wires with a diameter of d0 are selected as the first layer of core wire 22, and three ( Figure 1 ) or 5 ( Figure 2 A wet-drawn steel wire with a diameter of d1 is used as the second intermediate layer steel wire 33. It is twisted into a "2+M" center strand by the core of a double-twisting machine, with the twist direction being Z-twist. 11 strands are selected. Figure 1 ) or 12 ( Figure 2 A wet-drawn steel wire with a diameter of d2 is used as the third outer layer steel wire 44. The center strand and the third outer layer steel wire 44 are twisted together by a double twisting machine (S twist direction) to form a 2+3+11 or 2+5+12 structure steel cord 11.

[0021] Example 1: A 2+M+N structure high rubber penetration steel cord for radial tires. The steel cord 11 includes two first-layer core wires 22 with a diameter d0 of 0.22 mm, three second-layer intermediate wires 33 with a diameter d1 of 0.22 mm, and eleven third-layer outer wires 44 with a diameter d2 of 0.235 mm. The twist pitch of the second-layer intermediate wires 33 is 10 mm, and the twist pitch of the third-layer outer wires 44 is 16 mm.

[0022] Example 2: A 2+M+N structure high rubber penetration steel cord for radial tires. The steel cord 11 includes two first-layer core wires 22 with a diameter d0 of 0.22 mm, five second-layer intermediate wires 33 with a diameter d1 of 0.18 mm, and twelve third-layer outer wires 44 with a diameter d2 of 0.21 mm. The twist pitch of the second-layer intermediate wires 33 is 8 mm, and the twist pitch of the third-layer outer wires 44 is 16 mm.

[0023] Table 1. Steel cord data of embodiments 1-2 of the present application

[0024]

[0025] Finally, it should be noted that the above only for the preferred embodiments of the present application, and is not intended to limit the present application, although the foregoing embodiments of the present application has been described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application, should be included within the scope of the present application.

Claims

1. A 2+M+N high-hydric gel performance steel cord comprising a steel cord (11) comprising a first layer of core filaments steel wires (22), a second layer of intermediate layer steel wires (33), a third layer of outer layer steel wires (44), characterized in that: The steel cord (11) is a 2+M+N structure, wherein M=3-5, N=10-18, the steel cord (11) comprises 2 first layer core steel filaments (22) with a diameter d0, M (M=3-5) second layer intermediate layer steel filaments (33) with a diameter d1, and N (N=10-18) third layer outer layer steel filaments (44) with a diameter d2.

2. A 2+M+N high osmotic gel performance steel cord according to claim 1, characterized in that: The second layer intermediate layer steel filaments (33) are not completely wrapped on the surface of the two first layer core steel filaments (22) and are twisted around the first layer core steel filaments (22) to form a core strand, and the third layer outer layer steel filaments (44) are twisted around the core strand to form the steel cord (11).

3. A 2+M+N high osmotic gel performance steel cord according to claim 1, characterized in that: The twisting direction of the third layer outer layer steel filaments (44) is opposite to the twisting direction of the core strand, and when the core strand is in a Z direction, the third layer outer layer steel filaments (44) are in an S direction, and vice versa.

4. A 2+M+N high osmotic gel performance steel cord as claimed in claim 1, characterized in that: The twisting pitch of the third layer outer layer steel filaments (44) is p1, p1=10mm-20mm; the twisting pitch of the second layer intermediate layer steel filaments (33) is p2, and p2 5. A 2+M+N high osmotic gel performance steel cord as claimed in claim 1, characterized in that: The diameter d0 of the first layer core steel filaments (22) is 0.15mm-0.40mm.

6. A 2+M+N high osmotic gel performance steel cord as claimed in claim 1, characterized in that: The diameter d1 of the second layer intermediate layer steel filaments (33) is 0.15mm-0.40mm.

7. A 2+M+N high osmotic gel performance steel cord as claimed in claim 1, characterized in that: The diameter d2 of the third layer outer layer steel filaments (44) is 0.15mm-0.30mm.

8. A 2+M+N high osmotic gel performance steel cord as claimed in claim 1, characterized in that: The strength grade of the first layer core steel filaments (22), the second layer intermediate layer steel filaments (33), and the third layer outer layer steel filaments (44) is normal strength NT, high strength HT, super high strength ST, ultra high strength UT, or extra high strength MT.

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