A tire with high wet grip performance throughout its life cycle

Abstract

The present utility model relates to the technical field of tires, and provides a tire with high wet grip performance throughout its life cycle, including: a carcass; the crown part of the carcass sequentially has an inner liner layer, a ply layer, a belt layer, a chafe layer, a second tread rubber, and a first tread rubber from bottom to top; multiple main drainage grooves are longitudinally distributed on the first tread rubber and the second tread rubber; multiple transverse grooves are provided on the first tread rubber and the second tread rubber. The present utility model adopts a double-tread rubber structure and a deep groove design for the main drainage grooves, which can improve the wear resistance and wet grip performance of the tires, achieve high wet grip performance and drainage efficiency throughout the life cycle, and extend the service life of the tires.

Description

Technical Field

[0001] This utility model relates to the field of tire technology, and in particular to a tire with high wet grip performance throughout its entire life cycle. Background Technology

[0002] There has long been a technical contradiction between the wet grip performance (anti-slip ability) and wear resistance of tires: traditional single-layer tread rubber, if it focuses on anti-slip performance (such as using low glass transition temperature rubber), can improve wet braking performance, but wear resistance is insufficient; if it focuses on wear resistance (such as high hardness rubber), wet grip will be significantly reduced.

[0003] Traditional tires have fixed tread groove depths. As they wear down, the tread becomes shallower, which significantly reduces drainage efficiency and weakens wet grip performance. This results in a substantial increase in braking distance on wet and slippery roads, posing a safety hazard.

[0004] Therefore, there is an urgent need for a tire that can maintain high wet grip performance throughout its entire life cycle and achieve stable wet grip performance after wear. Utility Model Content

[0005] This invention primarily addresses the technical problems of traditional tires, such as the significant reduction in drainage efficiency and severe degradation of wet grip performance due to the tread becoming shallower with wear. It proposes a tire with high wet grip performance throughout its entire life cycle, employing a double-layer tread structure and a deep main drainage groove design. This improves the tire's wear resistance and wet grip performance, ensuring high wet grip and drainage efficiency throughout its entire life cycle and extending the tire's service life.

[0006] This utility model provides a tire with high wet grip performance throughout its entire life cycle, comprising: a tire carcass;

[0007] The tire carcass has, from bottom to top, an inner liner layer, a ply layer, a belt layer, a crown belt layer, a second tread layer, and a first tread layer;

[0008] The first and second tread layers have multiple longitudinally distributed main drainage grooves.

[0009] The first and second tread layers have multiple transverse grooves.

[0010] Preferably, the depth of the main drainage ditch is 6-10 mm.

[0011] Preferably, the width to depth ratio of the main drainage ditch is 1.15:1.

[0012] Preferably, the bottom sides of the main drainage ditch are chamfered.

[0013] Preferably, the angle of the main drainage ditch wall is 5-10°.

[0014] Preferably, the tire body has a reinforcing layer on its sidewall.

[0015] Preferably, the reinforcing layer is made of nylon thread material, and the reinforcing layer forms a 30° angle with the vertical direction.

[0016] Preferably, the fabric layer uses two layers of polyaramid fiber cords arranged in an alternating pattern, with the two layers of polyaramid fiber cords forming an 88° angle.

[0017] The present invention provides a tire with high wet grip performance throughout its entire life cycle, which has the following advantages compared with the prior art:

[0018] 1. The main drainage groove adopts a deep groove design with a depth of 6-10mm. The main drainage groove is relatively deep, extending from the tread surface to the wear mark position (usually 1.6mm of residual tread depth), ensuring that when the wear reaches the limit, the drainage efficiency is still ≥85% of the initial value.

[0019] 2. The tire tread employs a dual-layer tread structure. The first layer provides initial high wet grip and abrasion resistance; the second layer dynamically compensates for wet grip performance after wear, maintaining stability. As the tread wears, the rigid reinforcement structure is gradually released to compensate for the decrease in drainage efficiency. Specifically, the first layer significantly improves wet grip, increasing the abrasion index by 18%; the second layer retains over 90% of its initial wet grip performance after wear. The synergistic effect of the two tread layers achieves a "dynamic balance between wet grip and abrasion resistance," reducing the wet grip performance degradation rate by approximately 60%, significantly improving driving safety on wet and slippery roads and extending the tire's service life.

[0020] 3. The first and second tread layers have multiple longitudinally distributed main drainage grooves and multiple transverse grooves, adopting a hybrid groove structure that can balance drainage and handling.

[0021] 4. This utility model adopts a double-layer tread structure and a deep main drainage groove design, which can improve the tire's wear resistance and wet grip performance, ensuring high wet grip performance and drainage efficiency throughout its entire life cycle, guaranteeing wetland safety performance, and achieving a dynamic balance between anti-skid and wear resistance performance. The tire has excellent wear performance, reaching over 70,000 mileage, and has significant technical, economic, and social value. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the tire with high wet grip performance throughout its entire life cycle provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the main drainage ditch.

[0024] Reference numerals: 1. First tread layer; 2. Second tread layer; 3. Main drainage groove; 4. Crown belt layer; 5. Belt layer; 6. Cord layer; 7. Inner liner layer; 8. Reinforcing layer; 9. Mixed groove; 10. Wear mark location. Detailed Implementation

[0025] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0026] like Figure 1 As shown in the figure, the present invention provides a tire with high wet grip performance throughout its entire life cycle, comprising: a tire carcass.

[0027] The tire carcass has, from bottom to top, an inner liner layer 7, a ply layer 6, a belt layer 5, a crown belt layer 4, a second tread rubber layer 2, and a first tread rubber layer 1.

[0028] The first tread layer 1 is made of solution-polymerized styrene-butadiene rubber, specifically low glass transition temperature solution-polymerized styrene-butadiene rubber SSBR M2550. The second tread layer 2 is made of solution-polymerized styrene-butadiene rubber, specifically medium glass transition temperature modified solution-polymerized styrene-butadiene rubber SSBR F2743.

[0029] The tire crown of this invention employs a double-layer tread compound. The first tread compound 1 provides initial high wet grip resistance and wear resistance; the second tread compound 2 dynamically compensates for wet grip performance after wear, maintaining stability. As the tread wears, the rigid reinforcement structure is gradually released to compensate for the decrease in drainage efficiency. The synergistic effect of the two tread compounds achieves a "dynamic balance between wet grip and wear resistance," reducing the wet grip performance degradation rate by approximately 60%, significantly improving driving safety on wet and slippery roads, and extending the safe service life.

[0030] The first tread layer 1 and the second tread layer 2 have multiple longitudinally distributed main drainage grooves 3. The first tread layer 1 and the second tread layer 2 also have multiple transverse grooves 9. The transverse grooves 9 can take various forms, including grooves with the same shape, or mixed grooves with different shapes, with two or more shapes arranged alternately.

[0031] The main drainage groove 3 and the lateral groove 9 extend from the top surface of the first tread layer 1 (tread) to the second tread layer 2, which can improve drainage performance. Figure 2As shown, the depth of the main drainage groove 3 is 6-10 mm, preferably 7.6 mm. The tire main drainage groove 3 of this invention adopts a deep groove design, with a relatively large depth. The depth of the wear mark position 10 in the main drainage groove 3 is 1.6 mm (the distance from the tread surface to the wear mark position 10 is 5 mm). The width-to-depth ratio of the main drainage groove 3 is 1.15:1. Groove cross-sectional area retention rate: ≥85% of the initial value when worn to the limit. The lateral mixed groove 9 is 1 mm lower than the height of the wear mark position 10.

[0032] The bottom sides of the main drainage ditch 3 are chamfered with a chamfer radius of 1mm. The angle of the ditch wall of the main drainage ditch 3 (the normal offset angle of the arc from the tire crown to the bottom of the ditch wall) is 5-10°, and the ditch wall angle is preferably 5° to maximize the preservation of the cross-sectional area of ​​the main drainage ditch 3.

[0033] The tire body has a reinforcing layer 8 on its sidewall. The reinforcing layer 8 is made of nylon thread and is at a 30° angle to the vertical direction. The reinforcing layer 8 can reinforce the tire sidewall, improving its strength and scratch resistance.

[0034] The ply layer 6 is made of polyaramid fiber cord, which has high strength and low elongation, ensuring the strength of the tire carcass. The ply layer 6 consists of two layers of polyaramid fiber cord arranged in an 88° angle between them, enhancing tear resistance and high-speed stability.

[0035] The tire of this invention was tested: New tire wet grip safety performance index: 1.55 or higher, wet grip rating A. Wet grip performance index when 2mm of wear remains: 1.4. The first tread layer significantly improves wet grip, increasing the wear index by 18%; the second tread layer retains over 90% of its initial wet grip performance after wear. The tire of this invention provides wet grip safety performance throughout its entire lifespan.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A tire with high wet grip performance throughout its entire life cycle, characterized in that, include: fetus; The tire carcass has, from bottom to top, an inner liner layer (7), a ply layer (6), a belt layer (5), a crown belt layer (4), a second tread rubber layer (2), and a first tread rubber layer (1); The first tread layer (1) and the second tread layer (2) have multiple longitudinally distributed main drainage grooves (3); The first tread layer (1) and the second tread layer (2) have multiple transverse grooves (9).

2. The tire with high wet grip performance throughout its entire life cycle according to claim 1, characterized in that, The depth of the main drainage ditch (3) is 6-10 mm.

3. The tire with high wet grip performance throughout its entire life cycle according to claim 2, characterized in that, The width to depth ratio of the main drainage ditch (3) is 1.15:

1.

4. The tire with high wet grip performance throughout its entire life cycle according to claim 1, characterized in that, The bottom sides of the main drainage ditch (3) are chamfered.

5. The tire with high wet grip performance throughout its entire life cycle according to claim 1, characterized in that, The angle of the wall of the main drainage ditch (3) is 5-10°.

6. The tire with high wet grip performance throughout its entire life cycle according to claim 1, characterized in that, The tire body has a reinforcing layer (8) on its side.

7. The tire with high wet grip performance throughout its entire life cycle according to claim 6, characterized in that, The reinforcing layer (8) is made of nylon thread material, and the reinforcing layer (8) is at a 30° angle to the vertical direction.

8. The tire with high wet grip performance throughout its entire life cycle according to claim 1, characterized in that, The fabric layer (6) is made of two layers of polyaramid fiber cords arranged in an 88° angle between them.

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