Tread having sacrificial rib

Abstract

The invention relates to a tread which has at least three functional components and at least three material layers, wherein: the functional components comprise the base layer, at least one tread rib having at least one shoulder tread rib, and at least one sacrificial rib; each functional component is assigned a material layer; the material of the sacrificial rib below the shoulder tread rib is connected both to the material of the shoulder tread rib and to the material of the base layer. The invention also relates to a pneumatic vehicle tire having such a tread. The aim achieved by the invention, in particular for heavy duty tires, is that the abnormal wear of the tread is reduced for a longer period of time, in particular the crack formation in the groove base of the decoupling groove is delayed, and further properties such as abrasion and rolling resistance are optimized due to the targeted selection of materials.

Description

[0001] 202404157

[0002] 1

[0003] Running strip with sacrificial rib

[0004] The invention relates to a tread of a vehicle pneumatic tire and to a vehicle pneumatic tire with a tread.

[0005] A vehicle tire, which is filled with air, typically comprises several components, including a carcass, a tread, and a sidewall. The tread, with its profiled contact patch, is usually located above a structure that includes the carcass, a belt pack, and the sidewall. The "above" direction refers to the inside of the usually round tire, i.e., the tire's central axis, extending outwards. The carcass serves as the framework, and the tire is mounted onto the rim using its carcass. The contact patch of the tread is designed to make contact with the road surface during normal use of the pneumatic tire, specifically in the contact patch.

[0006] Particularly in commercial heavy-duty vehicle tires, such as those for trucks, the tread material, especially the material of specific layers or functional components of the tread, is adapted to the specific requirements. For example, the material of the part of the tread that comes into contact with the road is selected to provide particularly good resistance (hysteresis) and low rolling resistance. Conversely, the materials of the functional components of the tread that do not come into contact with the road, such as the base of the tread, are selected to have the lowest possible tan delta, thus generating minimal heat during deformation. For example, EP 4353495 A1 discloses a tire with a specific selection of the different material layers or functional components.

[0007] However, especially with commercial heavy-duty truck tires, there is the additional problem of irregular, abnormal wear of the tread and contact patch. Such tires are primarily used in a straight-line direction due to the long distances trucks travel. Furthermore, occasional peak loads occur, namely during [202404157].

[0008] 2

[0009] Maneuvering. To counteract this wear, it is known to arrange a so-called sacrificial rib at the respective edges of the running surface on the tread. These sacrificial ribs are usually arranged next to the shoulder ribs of the profile. These sacrificial ribs are separated from the adjacent shoulder ribs, and thus from the rest of the profile, by a decoupling groove in order to prevent wear and tear that would otherwise propagate into the profile blocks. From the

[0010] Tires with sacrificial ribs are known from US 2012 / 0234442 A1 or from WO 2019 / 066837 A1.

[0011] A common problem is that the tires, especially the treads, have to be removed or replaced because, on the one hand, the sacrificial rib has to be robustly attached to the rest of the tread, but on the other hand, cracks have formed on the bottom of the decoupling groove, thus compromising the function of the sacrificial ribs.

[0012] The problem is solved by a tread as described below, in particular according to claim 1, and a vehicle pneumatic tire as described below, in particular according to claim 15. Further solutions and advantageous embodiments of the aforementioned solutions are presented in the further claims and in the following description.

[0013] The core of the solution and invention can be summarized, for example, as follows:

[0014] The invention relates to a tread having at least three functional components and at least three material layers, wherein the functional components comprise the base layer, at least one profile rib comprising at least one shoulder profile rib, and at least one sacrificial rib, and wherein each functional component is associated with a material layer, the material of the sacrificial rib being bonded below the shoulder profile rib to both the material of the shoulder profile rib and the material of the base layer. The invention also relates to a vehicle pneumatic tire with such a tread. The invention reduces, in particular for heavy-duty tires, the abnormal wear of the tread over a longer period, especially 202404157

[0015] 3

[0016] The formation of cracks in the groove base of the decoupling groove is delayed, and further properties such as abrasion and rolling resistance are optimized through targeted material selection.

[0017] A tread according to the invention is a tread of a vehicle pneumatic tire, particularly for a truck. The tread comprises a running surface designed to contact the road during the intended use of the vehicle pneumatic tire. As is known from the prior art, the tread has a circumferential direction along which it has the largest contact area with the road. Furthermore, the tread also has a width direction extending transversely to the circumferential direction from a first edge of a running surface to a second edge of the running surface, and a thickness direction extending both transversely to the circumferential direction and transversely to the width direction, as well as from the running surface towards the interior of the vehicle pneumatic tire.

[0018] The tread according to the invention comprises several functional components. Among other things, the tread includes a base extending in the circumferential direction of the tire. This base can be designed as a single layer and / or form the lowest layer of the tread, which is arranged directly on a belt, e.g., a steel belt, or a carcass of the vehicle tire. A tread underlayment may also be located between the base and the belt assembly. This underlayment typically serves as a means of connecting the actual tread to the belt assembly.The tread backing plate typically has a thickness, particularly along the tread thickness direction (D), of a maximum of 2 mm, and in particular a maximum of 1 mm, and a width, particularly along the tire width direction (B), of at least 80%, and in particular at least 90%, of the tread width, in particular the width between the first edge and the second edge of the tire. Advantageously, the tread backing plate consists of, and in particular only of, rubber and / or does not include any reinforcement. 202404157.

[0019] 4

[0020] Furthermore, the tread according to the invention comprises at least one profile rib as a further functional component. The at least one profile rib is arranged at least partially above the base in the direction of the tread and extends in the circumferential direction of the tire.

[0021] It is now possible that the tread according to the invention has exactly one profile rib, exactly two or at least three profile ribs.

[0022] It is therefore conceivable that the tread has exactly two profile ribs, with the first of the two profile ribs forming a first shoulder profile rib located closest to the first edge, and the second of the two profile ribs forming a second shoulder profile rib located closest to the second edge. In such a case of exactly two profile ribs, the first shoulder profile rib and the second shoulder profile rib are separated from each other in the tire width direction (B) by a longitudinal groove that runs essentially in the tire circumference direction and extends in the tread thickness direction (D).

[0023] It is also conceivable that the tread has at least three profile ribs, with a first of the at least three profile ribs forming a first shoulder profile rib located closest to the first edge, and a second of the at least three profile ribs forming a second shoulder profile rib located closest to the second edge. Furthermore, the individual profile ribs of the at least three are separated from each other in the tire width direction by longitudinal grooves, the longitudinal grooves again running essentially in the tire circumference direction and extending essentially in the tread thickness direction.

[0024] It is also conceivable, however, that the tread has only a single profile rib. For the sake of uniformity, this single profile rib is then referred to as the first shoulder profile rib, since it is also located next to the first edge and there is no other profile rib closer to the first edge. In the case of a single profile rib, there is no longitudinal groove in the tread. For the purpose of tire wear indication, at least one tread hole extending along the tread thickness direction is usually arranged in the profile rib, for example, by means of a bore, with the depth of the tread hole typically being 202404157

[0025] 5

[0026] Analogous to the tire wear indicator, the treadwear indicator (TWI), a tread wear indicator is created. This allows tire wear to be detected based on the remaining depth of the tread hole, and the remaining permissible usability of the tire to be estimated. Based on the minimum tread depth, which is usually legally prescribed, the depth of the tread hole is then selected so that the thickness of the remaining tread material below the bottom of the tread hole meets the legal minimum requirements. As soon as the bottom of the tread hole is in the same plane as the tread surface, the tread no longer meets the legal requirements. The tread according to the invention can, in particular, have such a tread hole with this depth.

[0027] The individual profile ribs can in turn be formed from at least one profile block. However, it is preferred if the profile ribs are not formed from profile blocks, since the tread according to the invention is mainly used in long-distance transport and profile ribs without blocks are advantageous in this application.

[0028] Advantageously, the upper surface of at least one profile rib encompasses the running surface; in particular, the upper surface forms a large part and the most relevant part of the running surface.

[0029] As a rule, a tread pattern is largely symmetrical along its profile, so that the following descriptions regarding a feature at the first edge or at the first shoulder profile rib can also be applied to an identical feature at the second edge.

[0030] The tread according to the invention also comprises – as a further functional component – ​​at least one first sacrificial rib, wherein the first sacrificial rib adjoins the first shoulder profile rib and extends in the circumferential direction of the tire. The first sacrificial rib is arranged between the first shoulder profile rib and the first edge. Furthermore, a first decoupling groove is arranged in the circumferential direction of the tire between the first sacrificial rib and the first shoulder profile rib. The first decoupling groove runs substantially in the circumferential direction of the tire and extends in the tread thickness direction.

[0031] 6

[0032] For example, the first decoupling groove can separate the first sacrificial rib from the first shoulder profile rib, thus allowing the first decoupling groove to separate the first shoulder profile rib from the first sacrificial rib in the running surface.

[0033] Advantageously, the tread can also have a second sacrificial rib, wherein the second sacrificial rib adjoins a second shoulder rib and extends in the circumferential direction of the tire. The second shoulder rib is located between the second sacrificial rib and the remaining tread block rows and / or the second sacrificial rib is located between the second shoulder rib and the second edge. Furthermore, a second decoupling groove is arranged in the circumferential direction of the tire between the second sacrificial rib and the second shoulder rib. The second decoupling groove runs essentially in the circumferential direction of the tire and extends in the tread thickness direction. For example, the second decoupling groove can space the second sacrificial rib away from the second shoulder rib, thus separating the second shoulder rib from the second sacrificial rib in the tread.Advantageously, the second sacrificial rib and the second decoupling groove can be designed analogously to the second sacrificial rib and the second decoupling groove, respectively, and as described below.

[0034] According to the invention, the first sacrificial rib is formed by a first material, a first sacrificial rib material. If a second sacrificial rib is provided adjacent to the second edge, the second sacrificial rib is formed either by the first sacrificial rib material or by a second sacrificial rib material.

[0035] Furthermore, according to the invention, the base is formed by a base material.

[0036] According to the invention, the at least one profile rib comprises at least one profile rib material. Thus, the first shoulder profile rib comprises at least the profile rib material.

[0037] It is now possible that the first shoulder profile rib comprises at least one further material, e.g., the first sacrificial rib material, and is formed in particular by both the profile rib material and the first sacrificial rib material. 202404157

[0038] 7

[0039] However, it is also possible that the first shoulder profile rib is formed solely by the profile rib material. If a second shoulder profile rib is provided, this second shoulder profile rib also comprises the profile rib material. It is also possible here that the second shoulder profile rib comprises at least one further material, e.g., the first and / or second sacrificial rib material, and in particular is formed by both the profile block material and the first and / or second sacrificial rib material. However, it is equally possible that the second shoulder profile rib is formed solely by the profile rib material. If the tread according to the invention has at least three profile ribs, the remaining profile ribs of the at least three profile ribs can advantageously be formed by means of the profile rib material.

[0040] Advantageously, the different functional components therefore have different materials, especially different material compositions.

[0041] This allows the material of each component to be selected according to its function within the tread. Advantageously, the profile rib material is optimized for abrasion resistance, the sacrificial rib material for crack resistance, and the base material for rolling resistance.

[0042] The materials, i.e. the first sacrificial rib material, possibly the second sacrificial rib material, the profile rib material and possibly even the base material, can now be layered, in particular single-layered, double-layered and / or multi-layered.

[0043] Advantageously, the profile ribs consist of at least one layer of material, preferably at least, and in particular exactly, two layers, wherein a first of the two layers is arranged to come into contact with the road and form the tread, and the second of the two layers is arranged below the first layer in the tread thickness direction. 202404157

[0044] 8

[0045] Advantageously, the base material differs from the material of the profile ribs and from the material of the first, and optionally second, sacrificial rib material, and / or the profile rib material differs from the material of the first, and optionally second, sacrificial rib material, and / or from the base material, particularly in its chemical composition. Advantageously, the physical properties of the base also differ from those of the profile ribs and / or the sacrificial rib(s). Therefore, it is advantageous to use different components for the sacrificial rib, the base, and the profile ribs, each adapted to the specific requirements that these components must fulfill in the tread.

[0046] The use of different components, each adapted to the requirements of the tread, is a general aim and is described, for example, in EP 4353495 A1 for a base, an inner cap part, and an outer cap part of a shoulder rib, but not for a sacrificial rib separated from the shoulder rib by a decoupling groove. US 2012 / 0234442 A1 discloses a sacrificial rib separated from the shoulder rib by a decoupling groove, but there the sacrificial rib has a composition identical to the base and is even part of it. WO 2019 / 066837 A1 discloses, on the one hand, that a sacrificial rib can have a composition like one of the layers of the profile ribs, the lower layer in Figure 3, which also serves as the base of the tread.In another embodiment, a base is described, wherein the profile ribs are formed in two layers above this base. The base is intended to have properties that differ from those of the profile ribs. The sacrificial rib can either have the properties of one of the layers of the profile ribs or differ from them. No further details can be found in the disclosure.

[0047] For the purpose of better protection against abnormal wear, the sacrificial rib material, in particular the first sacrificial rib material forming the sacrificial rib, is now combined with the base material, which 202404157

[0048] 9

[0049] The base is connected along a first common connection area located and / or extending in the tread thickness direction below the first shoulder profile rib. Advantageously, the sacrificial rib is therefore connected to the base along this first connection area, which extends and / or is located in the tread thickness direction, particularly directly, below the first shoulder profile rib. Thus, the first sacrificial rib material is not connected to the base below the sacrificial rib or below the decoupling groove, as is the case, for example, in WO 2019 / 066837 A1, but rather the material of the first sacrificial rib extends to an area below the first shoulder profile rib.

[0050] Furthermore, and with regard to the purpose of better protection against abnormal wear, in conjunction with the design of the first connection area, the sacrificial rib material, in particular the first sacrificial rib material that forms the sacrificial rib, in particular the first sacrificial rib, is now also connected to the profile rib material that at least also forms the first shoulder profile rib, in particular also to the first shoulder profile rib, along a second common connection area arranged and / or running in the direction of the running surface thickness, in particular directly, below the first shoulder profile rib and / or in, in particular within, the first shoulder profile rib.The first sacrificial rib material, and thus in particular the sacrificial rib, is, in contrast to the disclosure in WO 2019 / 066837 A1, connected both to the base material and thus to the base as well as to the material that at least also forms the first shoulder profile rib, with these connections also taking place within or below the shoulder profile rib.

[0051] If a second shoulder profile rib and a second sacrificial rib are provided, the same applies. It is therefore provided that the second sacrificial rib is formed from the first sacrificial rib material or from a second sacrificial rib material that is very similar, in particular identical, to the first sacrificial rib material with regard to its composition and physical properties. Furthermore, it is provided that the second shoulder profile rib comprises the profile rib material. It is also provided, in an analogous manner, that 202404157

[0052] 10

[0053] The second or the first sacrificial rib material, which forms the second sacrificial rib, is connected to the base material, which forms the base, along a third common connection area located and / or extending in the tread thickness direction below the second shoulder profile rib. Furthermore, it is provided analogously that the second or the first sacrificial rib material, which forms the second sacrificial rib, is also connected to the profile rib material, which at least also forms the second shoulder profile rib, and in particular also to the second shoulder profile rib itself, along a fourth common connection area located and / or extending in the tread thickness direction below the second shoulder profile rib and / or within the second shoulder profile rib.

[0054] This connection in the first and second, and especially also in the third and fourth, connection area is in particular a material-bonded connection, e.g. during the, in particular joint, extrusion of the individual functional components, and / or is in particular an immediate and / or direct connection.

[0055] The connection of the first sacrificial rib to the base and the first shoulder profile rib shown above makes it possible to design the tread particularly robust, while also allowing the use of different components to improve durability and mitigate abnormal wear.

[0056] Advantageously, the profile rib material can have a first material composition and the base material a second material composition, the first material composition differing from the second. The profile ribs can be single-layered, double-layered, or even have further layers, in which case the profile rib material of the individual layers can have the first material composition or other material compositions, as long as the uppermost layer, which forms part of the running surface, has the first material composition. Advantageously, the first sacrificial rib can be formed from one layer or from two layers, an upper layer and a lower layer. Advantageously, the first 202404157

[0057] 11

[0058] The sacrificial rib material of the single-layer first sacrificial rib may have a third material composition, or the first sacrificial rib material of the lower layer may have a third material composition, and the first sacrificial rib material of the upper layer may have a fourth material composition. Advantageously, the material compositions differ from one another. Advantageously, the material composition, in particular of the first, second, and / or third, and especially the fourth and / or subsequent, material compositions, may be a rubber composition.

[0059] An advantageous rubber composition of the individual material composition is disclosed in more detail below, wherein the chemical composition per hundred parts rubber (phr) is specified, i.e., where the mass fractions of the individual, more precisely defined mixture components are given in relation to the total rubber. The sum of the mass fractions of the mixture components that are rubber thus equals 100, whereby the other mixture components that are not rubber increase the mass fraction to over 100. Here, too, the mass fractions of these mixture components are specified.

[0060] Advantageously, the rubber composition of the first material composition, from which at least one profile rib, namely the shoulder profile ribs at least partially and possibly the remaining profile ribs are formed, can now be

[0061] between 30 and 90, especially 40, parts natural rubber per hundred parts rubber,

[0062] between 10 and 25, especially 20, parts butadiene rubber per hundred parts rubber,

[0063] between 0 and 45, in particular 40, parts styrene-butadiene rubber per hundred parts rubber,

[0064] between 40 and 60, especially 55, parts carbon black per hundred parts rubber,

[0065] maximum 10, in particular 6, parts silica per hundred parts rubber, 202404157

[0066] 12

[0067] between 0 and 5, in particular 1.5, parts silane per hundred parts rubber, in particular no silane,

[0068] in particular a maximum of 20, in particular 11, parts of additives per hundred parts of rubber, and / or, in particular and,

[0069] between 1.5 and 5, in particular 3, parts of other volcanic chemicals per hundred parts of rubber, such as accelerators and / or sulfur, and in particular consist of these.

[0070] Advantageously, the rubber composition of the second material composition, from which the base is formed, can now be determined.

[0071] between 90 and 100, especially 100, parts natural rubber per hundred parts rubber,

[0072] between 0 and 10, in particular 0, parts butadiene rubber per hundred parts rubber,

[0073] between 0 and 10, in particular 0, parts styrene-butadiene rubber per hundred parts rubber,

[0074] between 20 and 50, in particular 22.5, parts carbon black per hundred parts rubber,

[0075] at least 10 and at most 30, in particular 13.5, parts silica per hundred parts rubber,

[0076] between 0 and 5, in particular 1, parts silane per hundred parts rubber, in particular no silane,

[0077] in particular a maximum of 20, in particular 10.2, parts additives per hundred parts rubber, and / or, in particular and,

[0078] between 1.5 and 5, in particular 3.8, parts of other volcanic chemicals per hundred parts of rubber, such as accelerators and / or sulfur, and in particular consisting of these.

[0079] Advantageously, the rubber composition of the third material composition, from which the first sacrificial rib, in particular the lower layer of the first sacrificial rib, is formed, can now be

[0080] between 40 and 90, in particular 85, parts natural rubber per hundred parts rubber, 202404157

[0081] 13

[0082] between 10 and 25, especially 15, parts butadiene rubber per hundred parts rubber,

[0083] between 0 and 45, in particular 0, parts styrene-butadiene rubber per hundred parts rubber,

[0084] between 18 and 60, in particular 47, parts carbon black per hundred parts rubber,

[0085] maximum 10, in particular 6, parts silica per hundred parts rubber, between 0 and 5, in particular 0, parts silane per hundred parts rubber, in particular no silane,

[0086] in particular a maximum of 20, in particular a maximum of 10 parts, in particular 8 parts, additives per hundred parts rubber, and / or, in particular, between 1.5 and 10, in particular 7.3, parts of other volcanic chemicals per hundred parts rubber, such as accelerators and / or sulfur, in particular consisting of.

[0087] The additives may advantageously include plasticizers, processing aids, UV protection, aging protection, activators (stearic acid, zinc oxide) and / or ozone stabilizers.

[0088] In particular, the compositions of the first material composition (referred to as “A (profile rib)” in Tables 1, 2, 3, 4, and 5 below), from which the at least one profile rib, namely the shoulder profile ribs, is at least partially formed, the second material composition (referred to as “B (base)” in Tables 1, 2, 3, 4, and 5 below), from which the base is formed, and the third material composition (referred to as “C (sacrificial rib)” in Tables 1, 2, 3, 4, and 5 below), from which the first sacrificial rib, in particular the lower layer of the first sacrificial rib, is formed, can have the following range, wherein the values ​​given are to be understood purely as a possible, yet feasible, example according to the invention, wherein all materials are represented in the context of a rubber composition, i.e., in relation to the total proportion of the rubber used, by means of the unit phr, as parts per hundred rubber.The following should be specified: 202404157

[0089] 14

[0090] Table 1: Rubber composition

[0091]

[0092] The tread strip according to the invention, in particular the first, second and third material compositions of the tread strip, can, in particular may, advantageously have the example composition listed in the following table:

[0093] Table 2: Rubber composition of an example

[0094]

[0095] Advantageously, the first sacrificial rib can be single-layered and / or have only one layer.

[0096] Alternatively, the first sacrificial rib can advantageously have at least one upper layer and one lower layer. Advantageously, the upper layer of the first 202404157

[0097] 15

[0098] The sacrificial rib forms part of the running surface and / or is designed to contact the road.

[0099] Advantageously, the lower layer of the first sacrificial rib can have the third material composition. Advantageously, the upper layer of the first sacrificial rib can have the fourth material composition and / or the first material composition. Advantageously, the second sacrificial rib can have at least one upper layer and one lower layer.

[0100] Advantageously, the lower layer of the second sacrificial rib is part of the lower layer of the first sacrificial rib, particularly as a common lower layer. Alternatively, the lower layer of the second sacrificial rib forms a separate and independent layer from the lower layer of the first sacrificial rib. Advantageously, the upper layer of the second sacrificial rib forms part of the running surface and / or is designed to contact the road.

[0101] Advantageously, the lower layer of the second sacrificial rib can have the third material composition. Advantageously, the upper layer of the second sacrificial rib can have the fourth material composition and / or the first material composition.

[0102] Advantageously, the lower layer of the first sacrificial rib can be connected to the base material along the first connection area.

[0103] Advantageously, the lower position of the first sacrificial rib and the profile block material, in particular the first shoulder profile rib, can be connected along the second connection area.

[0104] Advantageously, the lower layer of the second sacrificial rib can be connected to the base material along the third connection area.

[0105] Advantageously, the lower position of the second sacrificial rib can be connected to the profile block material, in particular to the second shoulder profile rib along the fourth connection area.

[0106] Advantageously, the upper layer of the first sacrificial rib can adjoin the first shoulder profile rib, separated by the first decoupling groove.

[0107] Advantageously, the upper layer of the second sacrificial rib can adjoin the second shoulder profile rib, separated by the second decoupling groove. 202404157

[0108] 16

[0109] Advantageously, in the second connection area, the sacrificial rib material can be connected to the underside of the first shoulder profile rib and / or within the first shoulder profile rib to the profile rib material of the first shoulder profile rib. Advantageously, the base material, in particular the base, can be connected to the underside of the first shoulder profile rib, especially in an extension of the second connection area along the underside of the first shoulder profile rib.

[0110] Advantageously, the second connection area between the first decoupling groove and a longitudinal groove or a second decoupling groove can extend along a distance, wherein the distance can be, in particular, at least 3 mm, in particular at least 4 mm, in particular at least 5 mm. Advantageously, the distance can be shorter than a length defined by a common connection between the profile rib material of the first shoulder profile rib and the base material of the base.

[0111] Advantageously, the first connection area can intersect the second connection area, particularly in the circumferential direction of the tire, along a connection section running along the underside of the first shoulder profile rib. In particular, the first sacrificial rib material, especially the first sacrificial rib, the base material, especially the base, and the profile rib material, especially the first shoulder profile rib, can be arranged such that the first sacrificial rib material, especially the first sacrificial rib, is connected in the connection section to both the base material, especially the base, and the profile rib material, especially the first shoulder profile rib.

[0112] Advantageously, the at least one longitudinal groove can terminate in the base material, particularly the base, or in the first sacrificial rib material, particularly the lower layer of the first sacrificial rib, or the bottom of the at least one longitudinal groove can be formed by the profile rib material. However, it is preferred that the at least one longitudinal groove terminates in the base material, although, due to manufacturing techniques, the at least one longitudinal groove can also terminate in the profile rib material.

[0113] 17

[0114] Advantageously, the bottom of the longitudinal groove can be formed by the top surface of the base material, in particular the base, of the first sacrificial rib material, in particular the lower layer of the first sacrificial rib, or by the profile rib material. Advantageously, the longitudinal grooves can form grooves in the base. However, depending on the specific manufacturing technique, it is also conceivable that the bottom of some of the longitudinal grooves is formed, for example, by the base and the bottom of other longitudinal grooves by the profile rib material.

[0115] Advantageously, the depth of at least one longitudinal groove can correspond to the tread depth of the running surface, in particular of the vehicle's pneumatic tire.

[0116] Advantageously, the tread according to the invention, if it has at least one longitudinal groove, has a tread depth based on the depth of the longitudinal groove extending in the direction of the tread thickness. Advantageously, the tread depth is at least 5 mm, in particular at least 5.5 mm, and / or a maximum of 30 mm, in particular a maximum of 27 mm. If the tread according to the invention does not have a longitudinal groove, the tread advantageously has the tread hole with a depth of [missing information], wherein the depth is dimensioned analogously to the TWI (Tire Width Interval), such that a layer of rubber, which could theoretically still be worn down, with a minimum height, legally defined in the EU as 1.6 mm, is still present below the bottom of the tread hole.

[0117] Advantageously, the decoupling groove extends along a depth in the tread thickness direction, in particular up to a groove base of the decoupling groove. Advantageously, the depth of the decoupling groove can be at least 80%, in particular at least 90%, in particular at least 100%, and / or a maximum of 110% of the tread depth or a depth defined by the sum of the depth of the tread hole and the minimum height, for example, 1.6 mm. Advantageously, additionally or alternatively, a groove base of the decoupling groove, in particular an averaged one, can be spaced from a groove base of the longitudinal groove adjacent to the shoulder rib, in particular an averaged one, corresponding to the tread depth, by at least 1.6 mm, in particular at least 2 mm, and / or a maximum of 6 mm, in particular a maximum of 5 mm, and / or an averaged 202404157

[0118] 18

[0119] The base of the decoupling groove must be spaced from the bottom of the tread hole by at least 0.4 mm and / or a maximum of 4.4 mm, in particular a maximum of 2.4 mm. Advantageously, an averaged groove base is based on the mean of the different heights of the groove base arrangement along the tire width direction.

[0120] Advantageously, the decoupling groove has a width, which runs transversely, and in particular perpendicularly, to the tire circumference direction, of at least 0.5 mm, in particular at least 1 mm, and / or a maximum of 5 mm, in particular a maximum of 3 mm, in particular a maximum of 2 mm.

[0121] Advantageously, the first decoupling groove can terminate in the first sacrificial rib material, particularly the lower layer of the first sacrificial rib. Advantageously, the base of the first decoupling groove, particularly the one terminating in the first sacrificial rib, can be part of the first sacrificial rib material, particularly the lower layer of the first sacrificial rib.

[0122] Advantageously, the decoupling groove can have a bottom and two side walls, wherein the bottom and a first of the two side walls are formed in particular by the sacrificial rib material and the second side wall is formed at least partially by the sacrificial rib material, in particular partially along a length of at least 1.6 mm, in particular at least 2 mm, extending in particular from the bottom, and / or is formed completely by the sacrificial rib material.

[0123] The following section discusses preferred vulcanizate properties of the rubber materials, which are indicators of the abrasion resistance, crack resistance, and rolling resistance of the respective rubber material of the tread according to the invention, as well as the relevant test standards used here, with reference being made to those test standards valid as of January 1, 2025. 202404157

[0124] 19

[0125] The Shore A hardness at a temperature of 25°C according to DIN EN ISO 868 (edition 2003-10) is used as an abrasion indicator. A rubber material with a higher Shore A hardness (25°C) is expected to have higher (better) abrasion resistance compared to a rubber material with a lower Shore A hardness (25°C).

[0126] The Shore A hardness is determined according to DIN EN ISO 868, edition 2003-10 (German version EN ISO 868:2003):

[0127] - Vulcanization parameters (production of test specimens):

[0128] Vulcanization temperature: 140°C

[0129] Vulcanization time: 30 minutes

[0130] - Measurement parameters:

[0131] Tempering time: 30 minutes

[0132] Temperature: 25°C ± 2°C

[0133] o Measurement duration (holding time): 15 seconds

[0134] The primary rolling resistance indicator is the rebound elasticity at a temperature of 70°C according to DIN 53512 (edition 2000-04), and the secondary rolling resistance indicator is the dynamic modulus at a temperature of 0°C according to DIN 53513 (edition 1990-03). A rubber material with a higher rebound elasticity R (70°C) and a lower dynamic modulus |E*| (0°C) is expected to have better (lower) rolling resistance.

[0135] The rebound elasticity is determined according to DIN 53512, edition 2000-04:

[0136] - Vulcanization parameters (production of test specimens):

[0137] Vulcanization temperature: 140°C

[0138] Vulcanization time: 30 minutes

[0139] - Test specimens:

[0140] Diameter: 44.6 mm

[0141] Thickness: 6.3 mm ± 0.3 mm

[0142] - Measurement parameters:

[0143] Tempering time: 30 minutes

[0144] Temperature (test specimen temperature): 70°C ± 1°C

[0145] The dynamic modulus |E*| (0°C) is determined according to DIN 53513, edition 1990-03:

[0146] - Vulcanization parameters (production of test specimens):

[0147] o Vulcanization temperature: 140°C202404157

[0148] 20

[0149] Vulcanization time: 30 minutes

[0150] - Measurement parameters:

[0151] o Measurement at constant temperature

[0152] Tempering time: 30 minutes

[0153] Temperature (test specimen temperature): 0°C ± 1°C

[0154] The primary indicator of crack resistance is the elongation at break at a temperature of 70°C according to DIN 53504 (edition 2017-03). A higher elongation at break £R (70°C) indicates better crack resistance. The secondary indicator of crack resistance is the tear propagation resistance at 100°C according to ASTM D624-00 (2000) (Graves test). A higher tear propagation resistance Ts (100°C) indicates better crack resistance. The elongation at break £R (70°C) is determined according to DIN 53504, edition 2017-03.

[0155] - Vulcanization parameters (production of test specimens):

[0156] Vulcanization temperature: 140°C

[0157] Vulcanization time: 30 minutes

[0158] - Test specimen: Ring R1

[0159] - Measurement parameters:

[0160] Temperature: 70°C ± 1°C

[0161] The tear resistance Ts (100°C) is determined according to ASTM D624-00 (2000) (Graves Test):

[0162] - Vulcanization parameters (production of test specimens):

[0163] Vulcanization temperature: 140°C

[0164] Vulcanization time: 30 minutes

[0165] - Test piece: Angle test piece (unnotched angle test piece, “Angle Test Piece according to Graves Type C”)

[0166] - Measurement parameters:

[0167] Temperature: 100°C ± 1°C

[0168] The three following tables 3 to 5 show the values ​​for the abrasion indicator, the rolling resistance indicators and the crack resistance indicators of the rubber materials of the profile ribs, the base and the sacrificial ribs, which are derived from the data given in Table 2 above.

[0169] 21

[0170] Rubber compounds are manufactured. Furthermore, Tables 3 to 5 contain general or preferred ranges for the indicators.

[0171] Table 3: Abrasion indicators

[0172]

[0173] Table 4: Crack resistance indicators

[0174]

[0175] 202404157

[0176] 22

[0177] Table 5: Rolling resistance indicators

[0178]

[0179] However, for example, there is no preferred value or range for the crack resistance indicators for the profile ribs and / or the base, since crack resistance for profile ribs and base is not the performance focus and is therefore secondary, and there is no preferred range for the rolling resistance indicators for the profile ribs, since profile ribs are optimized for abrasion.

[0180] Advantageously, the profile rib material, in particular the profile ribs, in particular the first material composition, can have a hardness with a Shore A hardness grade between 58 and 75, in particular between 64 and 70, in particular of 69.7, ShA at a temperature of 25°C.

[0181] Advantageously, the profile rib material layer, in particular the profile ribs, especially the first material composition, can exhibit a rebound elasticity R of at most 60%, particularly 54%, at 70°C. 202404157

[0182] 23

[0183] Advantageously, the profile rib material, in particular the profile ribs, in particular the first material composition, can have a dynamic modulus | E*| of at least 9.0 MPa and / or a maximum of 20 MPa, in particular 18.6 MPa, at 0°C.

[0184] Advantageously, the profile rib material, in particular the profile ribs, especially the first material composition, can have an elongation at break E R exhibiting 380% at 70°C.

[0185] Advantageously, the profile rib material, in particular the profile ribs, especially the first material composition, can have a tear resistance Ts at 100°C of 36.3 N / mm.

[0186] Advantageously, the profile rib material, in particular the profile ribs, especially the first material composition, can be electrically conductive.

[0187] Advantageously, the base material, in particular the base, in particular the third material composition, can have a hardness with a Shore A hardness at 25°C between 50 and 65, in particular between 55 and 65, in particular of 58, ShA.

[0188] Advantageously, the base material, in particular the base, in particular the third material composition, can exhibit a rebound elasticity of between 65% and 85%, in particular between 70% and 80%, in particular of 79.7% at 70°C.

[0189] Advantageously, the base material, in particular the base, in particular the third material composition, can have a dynamic modulus |E*| between 4.7 MPa and 7.7 MPa, in particular between 4.9 MPa and 6.5 MPa, in particular of 4.9 MPa, at 0°C.

[0190] 24

[0191] Advantageously, the base material, in particular the base, in particular the third material composition, can have an elongation at break E R exhibiting 400% at 70°C.

[0192] Advantageously, the base material, in particular the base, in particular the third material composition, can have a tear resistance Ts at 100°C of 36.0 N / mm.

[0193] Advantageously, the base material, in particular the base, and especially the third material composition, can be non-electrically conductive.

[0194] Advantageously, the first sacrificial rib material and, in particular, the second sacrificial rib material, especially the first sacrificial rib and, in particular, the second sacrificial rib, especially the third material composition, can have a hardness with a Shore A hardness grade between 55 and 70, in particular between 60 and 68, in particular of 61, ShA at 25°C.

[0195] Advantageously, the first sacrificial rib material and, in particular, the second sacrificial rib material, especially the first sacrificial rib and, in particular, the second sacrificial rib, especially the third material composition, can exhibit a rebound elasticity between 40% and 85%, in particular between 40% and 70%, in particular of 46.8%, at 70°C.

[0196] Advantageously, the first sacrificial rib material and in particular the second sacrificial rib material, in particular the first sacrificial rib and in particular the second sacrificial rib, in particular the third material composition, can have a dynamic modulus |E*| between 5 MPa and 8 MPa, in particular between 5 MPa and 7 MPa, in particular of 5.4 MPa, at 0°C.

[0197] Advantageously, the first sacrificial rib material and, in particular, the second sacrificial rib material, especially the first sacrificial rib and, in particular, the second sacrificial rib, especially the third material composition, can exhibit an elongation at break E at 70°C. R between 420% and 750%, in particular between 600% and 700%, in particular between 634%, and / or a tear resistance at 100°C Ts202404157

[0198] 25

[0199] between 36 N / mm and 70 N / mm, in particular between 45 N / mm and 55 N / mm, in particular between 53 N / mm.

[0200] Advantageously, the first sacrificial rib material and, in particular, the second sacrificial rib material, especially the first sacrificial rib and, in particular, the second sacrificial rib, especially the third material composition, can be non-electrically conductive.

[0201] Advantageously, individual profile blocks of the profile ribs can be separated from each other in the circumferential longitudinal direction by transverse grooves.

[0202] The problem is also solved by a vehicle pneumatic tire. The vehicle pneumatic tire comprises at least a structure comprising at least a carcass and a belt reinforcement, and a tread according to the invention, which is arranged above the structure in the tread thickness direction and is directly or indirectly connected to the structure, in particular the carcass and the belt reinforcement, especially by a material bond.

[0203] The tread or pneumatic tire according to the invention improves the durability and service life of the sacrificial ribs, especially in the area of ​​the respective decoupling groove, and thereby in particular delays the tearing of the sacrificial ribs, especially in the area of ​​the respective decoupling groove.

[0204] Further advantageous embodiments are illustrated by the following description of an exemplary embodiment with reference to the accompanying schematic figures. Each figure is shown in profile view, with the tire circumference extending into and out of the plane of the sheet:

[0205] Fig. 1 shows a first embodiment of a tread strip according to the invention, in which the base, the sacrificial rib and the shoulder profile rib are connected to each other at one point in the profile view; 202404157

[0206] 26

[0207] Fig. 2 shows a second embodiment of a running strip according to the invention based on the first embodiment, wherein the sacrificial rib is formed in two layers;

[0208] Fig. 3 shows a third embodiment of an invention in which the base, the sacrificial rib and the shoulder profile rib are connected at one point in the profile view, but the longitudinal groove base of the longitudinal grooves is formed by the profile rib material;

[0209] Fig. 4 shows a fourth embodiment of a tread according to the invention in which the sacrificial rib material extends over the entire tire width direction and is arranged between the tread block material and the base material, and thus also below the shoulder tread rib;

[0210] Fig. 5 shows a fifth embodiment of a running strip according to the invention based on the fourth embodiment, wherein the sacrificial rib is formed in two layers;

[0211] Fig. 6 shows a sixth embodiment of a tread strip according to the invention in which the sacrificial rib material extends upwards in the shoulder profile rib to the running surface and is also connected there to the profile rib material of the shoulder profile rib; and

[0212] Fig. 7 shows a view of a vulcanized vehicle pneumatic tire with a tread according to the invention as described in the first embodiment.

[0213] The exemplary embodiments are depicted in sketch form in the figures, so that individual features of the invention are particularly easy and clear to see. The proportions do not need to be realistically represented. Identical elements in the figures are labelled with the same reference numerals.

[0214] In particular, the profile views shown in Figures 1 to 6 do not correspond to the profile of a vulcanized pneumatic vehicle tire, but merely serve to simplify the illustration of the tread structure. For a profile of a vulcanized pneumatic vehicle tire, reference is made to Figure 7, although simplifications have also been made here, so that the proportions may not be realistically represented. 202404157

[0215] 27

[0216] Figure 1 shows a tread 1 according to the invention. In Figure 1 (as well as in the other figures of the further examples), the tread 1 is shown only schematically and in a profile view of a cross-section through the tread 1 along a tire width direction B of the tread 1. The tread 1 is generally part of a vehicle pneumatic tire (e.g., as indicated in Figure 7), in which the tread 1 represents the uppermost, outermost layer of the tire. Adjoining the tread 1 at its respective edges R1, R2 are sidewalls 92 extending downwards towards the center of the tire, and below the tread 1, there is generally a belt 91 as part of a carcass.The tread 1 thus extends, as also shown in the profile view of Figure 1, along a tire thickness direction D, which in turn extends from the inside of the tire to the outside of the tire, which is bounded by the tread surface 11 of the tread 1. It can now be seen that the tread 1 has several profile blocks on the tread surface 11, which run as profile ribs 31, 32, 33, 34, 35 in the tire's circumferential direction extending into the plane of the sheet. Figure 1 shows five such profile ribs, each separated from the others by longitudinal grooves 21, 22, 23, 24. The longitudinal grooves 21, 22, 23, 24 also run in the tire's circumferential direction. However, it is also conceivable that fewer or more profile ribs 31, 32, 33, 34, 35 are implemented in the tread according to the invention.In any case, as also shown in Figure 1, the profile ribs comprise a first shoulder profile rib 31, which is located closest to the first edge R1 among the profile ribs 31, 32, 33, 34, 35. As shown in Figure 1, such a shoulder profile rib is also located in the opposite area, namely a second shoulder profile rib 35 located closest to the second edge R2. Sacrificial ribs are now arranged at the outermost edges of the running surface 11 of the tread 1. Thus, a first sacrificial rib 41 is arranged at the first edge R1 and a second sacrificial rib 42 at the second edge R2. For example, the first shoulder profile rib 31 is located between the first sacrificial rib 41 and the other profile ribs, or the first sacrificial rib 41 is located between the first edge R1 and the first shoulder profile rib 31. Similarly, the second shoulder profile rib 35 is arranged between the second sacrificial rib 42 and the remaining profile block rows. 202404157.

[0217] 28

[0218] In this case, at least in the plane of the running surface 11, the first sacrificial rib 41 is decoupled from the first shoulder profile rib 31 by a first decoupling groove 51 and thus the first sacrificial rib 41 is separated from the first shoulder profile rib 31 by the first decoupling groove 51 arranged between the first sacrificial rib 41 and the first shoulder profile rib 31.

[0219] Furthermore, at least in the plane of the running surface 11, the second sacrificial rib 42 is decoupled from the second shoulder profile rib 35 by a second decoupling groove 52 and thus the second sacrificial rib 42 is separated from the second shoulder profile rib 35 by the second decoupling groove 52 arranged between the second sacrificial rib 42 and the second shoulder profile rib 35.

[0220] Furthermore, a base 2 is now arranged below the profile ribs 31, 32, 33, 34, 35. The first sacrificial rib 41 is formed by a first sacrificial rib material 401, the second sacrificial rib is likewise formed by the first sacrificial rib material 401, the base 2 is formed by a base material 200, and the middle profile ribs 32, 33, 34 are formed by a profile rib material 300. In the first embodiment, the shoulder profile ribs, i.e., the first and second shoulder profile ribs 31, 35, are also formed by the profile rib material 300, although other embodiments are conceivable, one of which is described in the fifth embodiment.

[0221] Furthermore, at the first edge R1 the first sacrificial rib material 401 of the first sacrificial rib 41 extends to below the first shoulder profile rib 31 and at the second edge R2 the first sacrificial rib material 401 of the second sacrificial rib 42 extends to below the second shoulder profile rib 35.

[0222] In the first embodiment, the base 2 or the base material 200 is generally directly, and in particular usually by a material bond, connected to the profile ribs 31, 32, 33, 34, 35, especially to the profile rib material 300, namely to their undersides. In the area of ​​the shoulder profile ribs 31, 35, however, below the underside of the shoulder profile ribs 31, 35, in addition to the base 2, the first sacrificial rib material 401 of the first or second sacrificial rib 41, 42 is also arranged and connected to the underside of the respective shoulder profile rib 31, 35, in particular directly, and in particular usually by a material bond. Thus, in the tread thickness direction below 202404157

[0223] 29

[0224] The first shoulder profile rib 31 has a first connection area 61 in which the first sacrificial rib material 401 of the first sacrificial rib 41 is connected to the base material 200. Furthermore, in the direction of the tread thickness below the first shoulder profile rib 31, there exists a second connection area 62 in which the first sacrificial rib material 401 of the first sacrificial rib 41 is connected to the profile rib material 300 of the first shoulder profile rib 31. The second connection area 62 runs along and on the underside of the first shoulder profile rib 31. The base material 200 of the base 2 is also connected to the shoulder profile rib 31 on the underside of the first shoulder profile rib 31, i.e., along an extension of the second connection area 62.The profile rib material 300 of the first shoulder profile rib 31 is connected both to the base material 200 of the base 2, namely in the extension of the second connection area 62, and to the first sacrificial rib material 401 of the first sacrificial rib 41, namely in the second connection area 62. Furthermore, the first sacrificial rib material 401 of the first sacrificial rib 41 is also connected to the base material 200 of the base 2, namely in the first connection area 61. The first connection area 61 and the second connection area 62 intersect in such a way that – when considering the profile – the intersection point between the first connection area 61 and the second connection area 62 – or, when considering the entire tread, the connection section 6 – corresponds to the point or...The section indicates where the base material 200, the first sacrificial rib material 401, the first sacrificial rib 41, and the profile rib material 300, the first shoulder profile rib 31, are each connected to one another. The functional components can be arranged analogously at the second edge.

[0225] The material composition of the sacrificial rib 41, 42 can now be selected in such a way that, on the one hand, a good connection with the base 2 and the respective shoulder profile rib 31, 35 is ensured, and on the other hand, a reduction of abnormal wear is ensured.

[0226] The material composition of the base 2, in turn, can be selected such that, on the one hand, a good connection with the profile ribs 31, 32, 33, 34, 35 as well as with the sacrificial ribs 41, 42, and on the other hand, a property of the tread 1202404157

[0227] 30

[0228] This can improve aspects such as rolling resistance. Finally, the material composition of the profile ribs 31, 32, 33, 34, 35 can also be specifically adapted to the desired requirements, such as abrasion resistance. As can be seen in Figure 1, the grooves are generally trough-shaped. Due to the respective connection areas 61, 62, or the connection section 6, below the respective shoulder profile rib 31, 35, the decoupling groove 51, 52 terminate in the respective sacrificial rib 41, 42. The longitudinal grooves 21, 22, 23, 24, on the other hand, terminate in the base layer 2.

[0229] Figure 2 shows a second embodiment of the tread 1 according to the invention. The tread 1 shown in this embodiment is essentially similar to the embodiment shown in Figure 1, except that the sacrificial ribs are formed in two layers. The first sacrificial rib 41 has an upper layer 411 and a lower layer 412. The upper layer 411 is designed to contact the road surface and thus borders the tread 11. The lower layer 412 consists of the first sacrificial rib material 401. The first sacrificial rib material 401 of the lower layer 412 of the first sacrificial rib 41 extends to below the first shoulder profile rib 31 and is connected to both the base material 200 of the base 2 and the profile rib material 300 of the first shoulder profile rib 31 in the connecting section 6.The second sacrificial rib 42 is designed in an analogous manner, namely with an upper layer 421 and a lower layer 422.

[0230] Figure 3 shows a third embodiment. This embodiment is similar to the first, except that the base of the longitudinal grooves 21, 22, 23, 24 is no longer the base material 200 or the base 2, but rather the profile rib material 300 itself. Such a configuration of the longitudinal groove base usually occurs when the longitudinal grooves are pressed into the profile rib material.

[0231] Figure 4 shows a fourth embodiment. Here too, the running stiffener 1 has a base 2 made of a base material 200. Here too, this base 2 is arranged below profile ribs 31, 32, 33, 34, 35, wherein with regard to 202404157

[0232] 31

[0233] For the internal structure of the profile rib 31, 32, 33, 34, 35 and the longitudinal grooves 21, 22, 23, 24 separating them, reference is made to the previous embodiments. This tread 1 also includes sacrificial ribs 41, 42 at the edges of the running surface 11 of the tread 1.

[0234] In contrast to the first, second, and third embodiments, the base material 200 of the base 2 does not extend to the underside of the profile ribs 31, 32, 33, 34, 35. Instead, the sacrificial rib material 401 of the first and second sacrificial ribs 41, 42 is arranged between the base material 200 of the base 2 and the profile rib material 300. The first sacrificial rib material 401 of the sacrificial ribs thus runs continuously along the entire width direction B of the tire.

[0235] Nevertheless, in a first connection area 61, there is a connection between the first sacrificial rib material 401 and the base material 200 of the base in the running surface thickness direction D below the first shoulder profile rib 31, and in a second connection area 62, there is a connection between the first sacrificial rib material 401 and the profile rib material 300 in the running surface thickness direction D below the first shoulder profile rib 31. Here, however, the first and second connection areas 61, 62 do not intersect in a connection section 6 along the underside of the first shoulder profile rib 31.

[0236] An analogous setup is also planned at the second edge R2.

[0237] As can also be seen, the longitudinal grooves 21, 22, 23, 24 do not end in the base material 200 of the base, but in the first sacrificial rib material 401.

[0238] Figure 5 shows a fifth embodiment of the tread 1 according to the invention. The tread 1 shown in this embodiment is essentially similar to the embodiment shown in Figure 4, except that the sacrificial ribs are formed in two layers. The first sacrificial rib 41 has an upper layer 411 and a lower layer 412. The upper layer 411 is designed to contact the road surface and thus borders the tread 11. The lower layer 412 of both sacrificial ribs 41 and 42 consists of the first sacrificial rib material 401.

[0239] 32

[0240] Figure 6 shows a sixth embodiment of the tread 1 according to the invention. This embodiment is initially based on the structure and arrangement of the fourth embodiment shown in Figure 4, in which the sacrificial rib material 401 extends over the entire width direction of the tire B and is arranged between the tread block material 300 and the base material 200. However, it would also be conceivable to use the fifth, first, second, or third embodiment as a starting point.

[0241] In contrast to the aforementioned first to fifth embodiments, in this sixth embodiment the first and second shoulder profile ribs 31, 32 are formed by both the profile rib material 300 and the first sacrificial rib material 401. The first shoulder profile rib 31, as well as the second shoulder profile rib 32, thus comprise not only the profile rib material 300 but also the sacrificial rib material 401. Therefore, the sacrificial rib material 401 also comes into contact with the road surface in the area of ​​the shoulder profile ribs. Nevertheless, here too, a connection exists between the sacrificial rib material 401 and the profile rib material 300, as well as with the base material 200 of the base 2, below the shoulder profile ribs.

[0242] Figure 7 shows a sketch of a portion of a vehicle tire in its final state, i.e., after vulcanization, which makes the actual shape and profile of the tread 1 more clearly visible. The tread is now arranged above the carcass, which comprises a belt pack 91. In the vehicle tire, the sidewall 92 extends downwards from the edges in the tread thickness direction D. An apex 93 and a bead strip 94 can then be arranged at this end, for example. It can now be seen that when using the tread 1 according to the invention, the first sacrificial rib material 401 of the first sacrificial rib 41 extends to below the first shoulder profile rib 31, and the first sacrificial rib is separated from the first shoulder profile rib 31 by the first decoupling groove 51.The first sacrificial rib material 401 of the first sacrificial rib 41 is connected to the base material 200 of the base 2 in the first connection area 61 and to the 202404157.

[0243] 33

[0244] Profile rib material 300 of the first shoulder profile rib 31 is connected in the second connection area 62.

Claims

202404157 34 Patent claims 1. Tread (1) of a vehicle tire, in particular for a truck, comprising a circumferential direction, a lateral direction (B) extending transversely to the circumferential direction from a first edge (R1) of a tread surface (11) of the tread (1) to a second edge (R2) of the tread surface (11), and a tread thickness direction (D) extending transversely to the circumferential direction and transversely to the lateral direction (B) from the tread surface (11) of the tread (1) towards an interior of the vehicle tire, comprising a base (2) extending in the circumferential direction and at least one profile rib (31, 32, 33, 34, 35) extending in the circumferential direction and arranged at least partially above the base (2) in the direction of the tread surface (11), wherein the at least one profile rib (31, 32, 33, 34, 35) a first shoulder profile rib (31) located closest to the first edge (R1),wherein the tread (1) comprises at least one first sacrificial rib (41) extending in the circumferential direction adjacent to the first shoulder profile rib (31), wherein the first sacrificial rib (41) is arranged between the first shoulder profile rib (31) and the first edge (R1), and wherein a first decoupling groove (51) extending substantially in the circumferential direction and in the tread thickness direction (D) is arranged between the first sacrificial rib (41) and the first shoulder profile rib (31), characterized in that the first sacrificial rib (41) is formed by means of a first sacrificial rib material (401), the first shoulder profile rib (31) comprises a profile rib material (300), and the base (2) is formed by means of a base material (200), wherein the first sacrificial rib material (401) is connected to the base material (200) along a first commonin the tread thickness direction (D) below the first shoulder profile rib (31) and wherein the first sacrificial rib material (401) is connected to the profile rib material (300), in particular the first shoulder profile rib (31), along a second common connection area (61) arranged and / or extending in the tread thickness direction (D) below and / or in the first shoulder profile rib (31). 35 connection area (62), in particular materially bonded and in particular directly, is connected.

2. Running strip (1) according to claim 1, characterized in that the first sacrificial rib (41) is formed in a single layer and the first sacrificial rib material (401) forms the first sacrificial rib (41).

3. Tread (1) according to claim 1, characterized in that the first sacrificial rib (41) has at least one upper layer (411) and one lower layer (412), wherein the sacrificial rib material of the lower layer (412) differs in particular from the sacrificial rib material of the upper layer (411), wherein the lower layer (412) of the first sacrificial rib (41) and its sacrificial rib material is connected to the base material (200), in particular the base (2), along the first connection area (61) and to the profile block material (300), in particular the first shoulder profile rib (31), along the second connection area (62), and wherein the upper layer (411) of the first sacrificial rib (41) is designed for contact with the road and adjoins the first shoulder profile rib (31) separated by the first decoupling groove (51).

4. Tread (1) according to one of the preceding claims, characterized in that the first connection area (61) intersects the second connection area (62), in particular in the circumferential direction of the tire, along a connection section (6) running along an underside of the first shoulder profile rib (31).

5. Tread (1) according to one of the preceding claims, characterized in that the depth of the at least one longitudinal groove (21, 22, 23, 24) corresponds to the tread depth of the tread (1), in particular of the vehicle pneumatic tire, and that the decoupling groove (51, 52), in particular the first and / or second, extends along a depth in the tread thickness direction (D), in particular to a groove base of the decoupling groove (51, 52), wherein the depth of the decoupling groove (51, 52) is at least 80%, in particular at least 90%. 36 in particular at least 100%, and / or at most 110% of the tread depth (1).

6. Tread (1) according to the preceding claim, characterized in that a groove base of the, in particular first and / or second, decoupling groove (51, 52) is spaced apart from a groove base of the longitudinal groove (21, 24) adjacent to the, in particular first and / or second, shoulder profile rib (31, 32) by a distance of at least 1.6 mm, in particular at least 2 mm, and / or a maximum of 6 mm, in particular a maximum of 5 mm.

7. Running strip (1) according to one of the preceding claims, characterized in that the, in particular first and / or second, decoupling groove (51, 52) has a width of at least 0.5 mm, in particular at least 1 mm, and / or a maximum of 5 mm, in particular a maximum of 3 mm, in particular a maximum of 2 mm.

8. Running strip (1) according to one of the preceding claims, characterized in that the, in particular first and / or second, decoupling groove (51, 52), each has a bottom and two side walls, in particular wherein, in particular, the bottom and a first of the two side walls are formed by the, in particular first and / or second, sacrificial rib material (401, 412, 422) and the second side wall is formed at least sectionally by the sacrificial rib material (401, 412, 422).

9. Running strip (1) according to the preceding claim, characterized in that the second side wall is formed section by section along a length of at least 1.6 mm, in particular at least 2 mm, extending in particular from the ground, by the sacrificial rib material (401, 412, 422) and / or is formed completely by the sacrificial rib material (401, 412, 422).

10. Running strip (1) according to one of the preceding claims, characterized in that the second connection area (62) is located between the 202404157 37 first decoupling groove (51) and a longitudinal groove (21) or a second decoupling groove (52) extends along a distance, wherein the distance is in particular at least 3 mm, in particular at least 4 mm, in particular at least 5 mm, wherein in particular the distance is less than a length defined by a common connection between the profile rib material (300) of the first shoulder profile rib (51) and the base material (200) of the base (2).

11. Running strip (1) according to one of the preceding claims, characterized in that that the at least one longitudinal groove (21, 22, 23, 24) in the base material (200), in particular base (2), the profile rib material (300) and / or first sacrificial rib material (401), in particular the lower layer (42), terminate and / or that the first decoupling groove (51) terminates in the first sacrificial rib material (401), in particular in the lower layer (42) of the first sacrificial rib (41), wherein in particular a bottom of the first decoupling groove (51) is part of the first sacrificial rib material (401), in particular the lower layer (412) of the first sacrificial rib (41).

12. Running strip (1) according to one of the preceding claims, characterized in that the profile rib material (300), in particular the profile ribs (31, 32, 33, 34, 35), in particular the first material composition, has a hardness with a Shore A hardness at 25°C between 58 and 75, in particular between 64 and 70, in particular of 69.7, a rebound elasticity at 70°C of a maximum of 60%, in particular of 54%, and / or a dynamic modulus |E*| of at least 9.0 MPa and / or a maximum of 20 MPa, in particular of 18.6 MPa, at 0°C and / or is electrically conductive, the base material (200), in particular the base (2), in particular the third material composition, a hardness with a Shore A hardness at 25°C between 50 and 65, in particular between 55 and 65, in particular of 58, a rebound elasticity at 70°C between 65% and 85%, in particular between 70% 202404157 38 and 80%, in particular 79.7%, and / or has a dynamic modulus |E*| between 4.7 MPa and 7.7 MPa, in particular between 4.9 MPa and 6.5 MPa, in particular 4.9 MPa, at 0°C and / or is not electrically conductive, and / or the first sacrificial rib material (401), in particular the first sacrificial rib (41), in particular the third material composition, a hardness with a Shore A hardness at 25°C between 55 and 70, in particular between 60 and 68, in particular of 61, a rebound elasticity at 70°C between 40% and 85%, in particular between 40% and 70%, in particular of 46.8%, a dynamic modulus |E*| between 5 MPa and 8 MPa, in particular between 5 MPa and 7 MPa, in particular of 5.4 MPa, at 0°C, an elongation at break E R between 420% and 750%, in particular between 600% and 700%, in particular between 634%, and / or has a tear resistance Ts between 36 N / mm and 70 N / mm at 100°C, in particular between 45 N / mm and 55 N / mm, in particular between 53 N / mm, and / or is not electrically conductive.

13. Tread strip (1) according to one of the preceding claims, characterized in that the profile rib material (300) has a first material composition, the base material (200) has a second material composition, and the first sacrificial rib (41) is formed from one layer or from two layers, an upper layer (411) and a lower layer (412), and the first sacrificial rib material (401) of the single-layer first sacrificial rib (41) has a third material composition, or the first sacrificial rib material (401) of the lower layer (412) has a third material composition, and the first sacrificial rib material (401) of the upper layer (411) has a fourth material composition, wherein the first, second, and third, and, in particular, fourth, material compositions are each different from one another, wherein, in particular, the first, second, and / or third, and in particular, fourth, material composition is a rubber composition, and wherein, advantageously, the rubber composition of the first material composition, each per hundred parts rubber, between 30 and 90, in particular 40, parts natural rubber, between 10 and 25, in particular 20, parts 202404157 39 Butadiene rubber, between 0 and 45, especially 40, parts Styrene-butadiene rubber, between 40 and 60, in particular 55, parts; carbon black, maximum 10, in particular 6, parts; silica, between 0 and 5, in particular 1.5, parts; silane, in particular a maximum of 20, in particular 11, parts; additives, between 1.5 and 5, in particular 3, parts; other volcanic chemicals, such as accelerators and / or sulfur, comprising the rubber composition of the second material composition, each per hundred parts of rubber: between 90 and 100, in particular 100, parts; natural rubber, between 0 and 10, in particular 0, parts Butadiene rubber, between 0 and 10, especially 0, parts Styrene-butadiene rubber, between 20 and 50, in particular 22.5, parts; carbon black, at least 10 and at most 30, in particular 13.5, parts; silica, between 0 and 5, in particular 1, parts; silane, at most 20, in particular 10.2, parts; additives, between 1.5 and 5, in particular 3.8, parts; other volcanic chemicals, such as accelerators and / or sulfur, and / or The rubber composition of the third material composition consists of between 40 and 90, in particular 85, parts of natural rubber per hundred parts, and between 10 and 25, in particular 15, parts. Butadiene rubber, between 0 and 45, especially 0, parts Styrene-butadiene rubber, between 18 and 60, in particular 47, parts; carbon black, maximum 10, in particular 6, parts; silica, between 0 and 5, in particular 0, parts; silane, maximum 1, in particular maximum 20 parts, in particular maximum 10 parts, in particular 8 parts; additives, and between 1.5 and 10, in particular 7.3, parts of other volcanic chemicals, such as accelerators and / or sulfur.

14. Tread strip (1) according to one of the preceding claims, characterized in that the first shoulder profile rib (31) is formed by both the profile rib material (300) and the first sacrificial rib material (401). 40 15. Vehicle pneumatic tire with a construction comprising a carcass and a belt structure and a tread (1) arranged above the construction and directly or indirectly connected to the construction according to one of the preceding claims.

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