Open type steel cord with high glue permeation

Abstract

The utility model relates to the technical field of steel cords, in particular to a high-glue-permeation open type steel cord which is formed by weaving and twisting five monofilaments in the same direction. Wherein in the cross section of the steel cord 10, the five monofilaments are distributed in a pentagonal mode, a gap L is formed between any two monofilaments, and a glue permeating area is formed among the five monofilaments. The gaps with unequal intervals are formed between the monofilaments in the steel cord, so that during impregnation, rubber can permeate through the gaps and completely wrap the five monofilaments, a steel cord structure with a high wrapping rate is formed, the permeation amount of the rubber on the inner sides of the monofilaments is large, the contact opportunity between the monofilaments is reduced, friction is reduced, abrasion between steel wires is reduced, and the service life of the steel cord is prolonged. Therefore, the service life of the steel cord can be prolonged, performance reduction caused by abrasion is reduced, meanwhile, gaps among the steel wires are filled, the space for water vapor permeation is reduced, and the risk that the steel cord is corroded is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of steel cord, in particular to an open steel cord with high-permeability glue. Background Art

[0002] Steel cords with high-permeability glue are pursued in the market. For example, when steel cords are used to reinforce tires, the higher the rubber permeability of the steel cords, the better the fatigue resistance of the steel cords. For steel cords with high rubber permeability, the contact between wires is less, the gap is larger, and the friction is lower. Therefore, the wear of the wires is also lower. Since rubber penetrates into the steel cord, there is less space in the steel cord for water vapor to penetrate, and the chance of corrosion of the steel cord is also less. Therefore, steel cords with high rubber permeability have good fatigue resistance and long service life. When applied to reinforce tires, the service life of the tires is also long.

[0003] Therefore, for steel cords, the size of the gap between single wires is very important for their rubber penetration performance. Summary of the Utility Model

[0004] In view of the technical problems existing in the steel cord in the prior art, a first aspect of the utility model provides an open steel cord with high-permeability glue, which is formed by twisting five single wires in the same direction;

[0005] Wherein, in the cross-section of the steel cord, the five single wires are distributed in a pentagon, and there is a gap L between any two single wires, and a glue penetration area is formed between the five single wires. The diameter of the inscribed circle of the glue penetration area is D3, the diameter of the single wire is D1, and the diameter of the steel cord is D2. Wherein, D1 / D2 = 0.375 - 0.400, D3 / D2 = 0.20 - 0.25.

[0006] Preferably, the diameter D1 of the single wire 1 is between 0.15 and 0.32.

[0007] Preferably, the diameter D2 of the steel cord 10 is between 0.40 and 0.80.

[0008] Preferably, the twisting direction of the five single wires 1 is the S direction.

[0009] Preferably, the twist pitch of the steel cord 10 is between 9 and 12 mm.

[0010] Preferably, the breaking elongation rate of the steel cord 10 is between 3.5% and 5.5%.

[0011] Preferably, the elongation rate of the steel cord 10 under a load of 2.5 - 50 N is between 0.50% and 0.72%.

[0012] Preferably, the strength of the steel cord 10 is 1027 N / mm 2。

[0013] Compared with the prior art, the advantages of the present utility model are as follows:

[0014] Gaps with unequal distances are formed between each single wire in the steel cord. In this way, when dipping in rubber, the rubber can penetrate through the gaps and completely coat the five single wires, forming a steel cord structure with a high coating rate. The amount of rubber penetration inside the single wires is large, reducing the contact opportunities between the single wires and the friction, thereby reducing the wear between the steel wires. This helps to extend the service life of the steel cord and reduce the performance degradation caused by wear. At the same time, the gaps between the steel wires are filled, reducing the space for water and gas penetration and lowering the risk of corrosion of the steel cord. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings are not intended to be drawn to scale. In the drawings, each identical or approximately identical component shown in each figure may be denoted by the same reference numeral. For the sake of clarity, not every component is labeled in each figure. Now, embodiments of various aspects of the present utility model will be described by way of examples and with reference to the drawings, wherein:

[0016] Figure 1 is a schematic structural view of the open-type steel cord with high rubber penetration shown in the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] In order to better understand the technical content of the present utility model, specific embodiments are given below in conjunction with the accompanying drawings for illustration.

[0018] As Figure 1 shown, a first aspect of the present utility model provides an open-type steel cord with high rubber penetration, which is formed by twisting five single wires 1 in the same direction; wherein, in the cross-section of the steel cord 10, the five single wires 1 are distributed in a pentagon, and there is a gap L between any two single wires 1.

[0019] Each single wire is pre-deformed by a needle-type pre-deformer and extends in a spiral state in space. When the five steel wires are twisted according to a predetermined pitch to form a steel cord, gaps with unequal distances are formed between each single wire in the steel cord. In this way, when dipping in rubber, the rubber can penetrate through the gaps and completely coat the five single wires 1, forming a steel cord structure with a high coating rate.

[0020] Among them, a rubber penetration area 101 is formed between five single filaments 1. The diameter of the inscribed circle of the rubber penetration area 101 is D3, the diameter of the single filament 1 is D1, and the diameter of the steel cord 10 is D2. Among them, D1 / D2 = 0.375 - 0.400, and D3 / D2 = 0.20 - 0.25. In this way, the rubber has a large penetration amount inside the single filament 1, reducing the contact opportunity between the single filaments 1, reducing friction, thereby reducing the wear between the steel wires. This helps to extend the service life of the steel cord and reduce the performance degradation caused by wear. At the same time, it fills the gap between the steel wires, reduces the space for water vapor penetration, and reduces the risk of corrosion of the steel cord.

[0021] In an alternative embodiment, the diameter D1 of the single filament 1 is between 0.15 and 0.32, and the diameter D2 of the formed steel cord 10 after twisting is between 0.40 and 0.80. Among them, the twist direction of the five single filaments 1 is the S direction.

[0022] In the above embodiment, the twist pitch of the steel cord 10 is controlled to be between 9 and 12 mm. The breaking elongation rate of the formed steel cord 10 is between 3.5% and 5.5%. In particular, the elongation rate of the steel cord 10 under a load of 2.5 - 50 N is between 0.50% and 0.72%.

[0023] In this way, the steel cord 10 has good elasticity and extensibility. Therefore, a larger rubber penetration gap is formed between the single filaments to fully coat the single filaments with rubber penetration, avoiding line contact and friction between the single filaments, and also reducing the probability of the steel wires being eroded by water vapor. Therefore, when the steel cord is used in the belt layer of a tire, this high rubber penetration amount helps to improve the overall performance of the tire. First, the fatigue resistance of the steel cord is enhanced, and the tire is not prone to performance degradation and damage during long-term use, thereby extending the service life of the tire and contributing to a more lightweight design to reduce the weight of the tire and improve fuel economy.

[0024] In an alternative embodiment, the diameter of the single filament is 0.15 mm, the diameter of the steel cord 10 is 0.40 mm, and the five single filaments 1 are twisted according to a twist pitch of 9 mm. The strength of the formed steel cord 10 is 1027 N / mm 2 .

[0025] Combining the above embodiments, gaps with unequal distances are formed between each single filament in the steel cord. In this way, when dipping in rubber, the rubber can penetrate through the gaps and completely coat the five single filaments, forming a steel cord structure with a high coating rate. The rubber has a large penetration amount inside the single filament, reducing the contact opportunity between the single filaments, reducing friction, thereby reducing the wear between the steel wires. This helps to extend the service life of the steel cord and reduce the performance degradation caused by wear. At the same time, it fills the gap between the steel wires, reduces the space for water vapor penetration, and reduces the risk of corrosion of the steel cord.

[0026] Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Those with ordinary knowledge in the technical field to which the present utility model pertains can make various modifications and refinements without departing from the spirit and scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to that defined by the claims.

Claims

1. An open-type steel cord for high-permeability glue, characterized in that, It is formed by twisting five single filaments (1) in the same direction; Among them, in the cross-section of the steel cord (10), the five single filaments (1) are distributed in a pentagon, and there is a gap L between any two of the single filaments (1). A rubber penetration area (101) is formed between the five single filaments (1). The diameter of the inscribed circle of the rubber penetration area (101) is D3, the diameter of the single filament (1) is D1, and the diameter of the steel cord (10) is D2. Among them, D1 / D2 = 0.375 - 0.400, D3 / D2 = 0.20 - 0.

25.

2. The open-type steel cord of the hypertonic glue according to claim 1, characterized in that, The diameter D1 of the single filament (1) is between 0.15 and 0.

32.

3. The open-type steel cord of the hypertonic glue according to claim 1, characterized in that, The diameter D2 of the steel cord (10) is between 0.40 and 0.

80.

4. The open steel cord of the hypertonic glue according to claim 1, characterized in that, The twisting direction of the five single filaments (1) is the S direction.

5. The open steel cord of the hypertonic glue according to claim 1, characterized in that The twist pitch of the steel cord (10) is between 9 and 12 mm.

6. The open steel cord of the hypertonic glue according to claim 1, characterized in that The breaking elongation rate of the steel cord (10) is between 3.5% and 5.5%.

7. The open type steel cord of the hypertonic glue according to claim 6, characterized in that, The elongation rate of the steel cord (10) under a load of 2.5 - 50 N is between 0.50% and 0.72%.

8. The open steel cord of the hypertonic glue according to claim 1, characterized in that, The strength of the steel cord (10) is 1027 N / mm 2 .

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