Vehicle tyre and method

Abstract

The invention relates to a vehicle tyre (100) comprising: - a tyre inner side (101) which surrounds a tyre cavity (102), - a sound absorber (120), - an adhesive bond (140), wherein the sound absorber (120) is fastened to the tyre inner side (101) by means of the adhesive bond (140), and wherein the adhesive bond (140) has a reinforcing structure (141), - a grip region (150) which is coupled to the reinforcing structure (141) in order to release the adhesive bond (140) from the tyre inner side (101) by means of a movement of the grip region (150).

Description

[0001] 202404127

[0002] - 1 -

[0003] Description

[0004] Vehicle tires and procedures

[0005] The application concerns a vehicle tire and a process for modifying a vehicle tire.

[0006] A vehicle tire, also known as a motor vehicle tire, pneumatic tire, or simply tire, has a tread. This is the outer, running surface that allows the tire to roll on a surface. The tire is mounted on a rim.

[0007] It is desirable to specify a vehicle tire that allows for reliable recycling. It is also desirable to specify a process for processing a vehicle tire that is simple and reliable. In particular, the process is suitable for processing a vehicle tire described herein.

[0008] Embodiments of the disclosure relate to a vehicle tire and a method for processing a vehicle tire, in particular for processing a vehicle tire as described herein. Features and advantages of the vehicle tire also apply to the method and vice versa.

[0009] The vehicle tire has an inner surface. This inner surface surrounds a tire cavity. In particular, the inner surface at least partially surrounds the tire cavity. For example, when the vehicle tire is mounted, the tire cavity is surrounded by the inner surface, the sidewalls, and the rim.

[0010] The vehicle tire incorporates a sound absorber. This sound absorber is specifically designed to absorb and / or dampen emissions in a frequency range audible to the human ear. For example, it dampens the propagation and / or formation of sound waves in a range audible to the human ear. 202404127

[0011] - 2 -

[0012] The vehicle tire has an adhesive bond. The sound absorber is attached to the inside of the tire by means of this adhesive bond. The adhesive bond has a reinforcing structure.

[0013] The vehicle tire has a gripping area that is directly or indirectly coupled to the reinforcement structure. In particular, the gripping area is part of the bonding. The gripping area is designed to allow the bonding to be released from the inside of the tire by means of a movement of the gripping area.

[0014] The grip area, also known as a handle, gripping area, or attack tab, provides a point of contact for the adhesive. This allows for easy and reliable gripping of the adhesive to apply force. This force is used to move the grip area, specifically to peel it off and thus detach the adhesive from the inside of the tire. By detaching the adhesive, the sound absorber can be removed from the inside of the tire. The reinforced structure within the adhesive prevents unwanted tearing when pulling on the grip area. This reinforcement ensures that the adhesive can be reliably and almost completely removed from the inside of the tire. Therefore, the sound absorber, along with the adhesive, can be removed from the inside of the tire.

[0015] This means that no, or virtually no, residues of the adhesive and sound absorber remain on the inside of the tire. Therefore, the rubber tire body, to which the tread of the vehicle tire is attached, can be processed further with no or negligible adhesive residues, particularly recycling processes and / or reuse or reuse options. For example, this prevents adhesive residues from damaging or impairing processing machines used for further processing of the tire body. Furthermore, the tire body material can be reused or recycled in a more homogeneous manner, without any adhesive residues getting into the material. 202404127

[0016] - 3 -

[0017] According to at least one embodiment, the reinforcement structure comprises a plurality of reinforcing fibers. These reinforcing fibers may be, for example, natural and / or synthetic fibers, textiles and / or textile fibers, or other types of fibers. The fibers are particularly flexible to accommodate the movements occurring during operation. The fibers enable reliable reinforcement of the adhesive bond, allowing it to be removed from the inner tire sidewall as completely as desired. Furthermore, the grip area can be reliably bonded to the reinforcing fibers or a portion thereof. Thus, when the adhesive bond is removed, the force exerted on the grip area is reliably transferred to the reinforcing fibers and therefore to the reinforcement structure.

[0018] For example, the reinforcing fibers of the majority of the reinforcing fibers extend parallel to each other in the same direction along a longitudinal dimension of the sound absorber. Alternatively or additionally, reinforcing fibers of the majority of the reinforcing fibers extend along a transverse direction of the sound absorber. The transverse and longitudinal directions are, in particular, perpendicular to each other. It is also possible for the reinforcing fibers of the majority of the reinforcing fibers to be oriented obliquely to the longitudinal and / or transverse direction. The reinforcing fibers can be oriented according to any pattern, for example, arbitrarily and / or randomly distributed within the adhesive. The spacing between the reinforcing fibers can be chosen arbitrarily, for example, depending on the strength of the adhesive. Thus, reliable removal of the adhesive is possible.

[0019] According to at least one embodiment, the gripping area is arranged laterally next to the sound absorber. For example, the gripping area extends laterally along the entire length of the sound absorber. Alternatively, the gripping area may be arranged laterally only in a partial area of ​​the sound absorber, for example, only a few centimeters or less. Thus, the gripping area is reliably accessible, and the sound absorber can be bonded to the inside of the tire across its entire surface, particularly along its edge. 202404127

[0020] - 4 -

[0021] According to further embodiments, the grip area is alternatively or additionally arranged between the inner side of the tire and the sound absorber. Arranging the grip area between the inner side of the tire and the sound absorber eliminates the need for additional installation space. Furthermore, the grip area is protected from, for example, dirt or other impairments during the operation of the vehicle tire.

[0022] According to further embodiments, the gripping area is alternatively or additionally arranged at a longitudinal end of the sound absorber. It is possible for the gripping area to project beyond the sound absorber at a longitudinal end. Alternatively or additionally, it is possible for the gripping area to be arranged at a longitudinal end between the inner side of the tire and the sound absorber. It is also possible for the gripping area to be arranged laterally between the inner side of the tire and the sound absorber. Arranging the gripping area at the longitudinal end of the sound absorber allows for reliable removal of the adhesive and the sound absorber along the longitudinal direction of the sound absorber. Furthermore, it is possible, for example, to create a sufficiently large gripping area.

[0023] For example, a recess is provided between the two longitudinal ends of the sound absorber in its operational state. The handle area is located in this recess, ensuring reliable access.

[0024] Alternatively or additionally, the sound absorber may have the recess in a different location. In particular, it is possible that the recess is located in a central area of ​​the sound absorber, spaced apart from the longitudinal ends. This allows the sound absorber, along with its adhesive, to be detached from the inside of the tire starting from this central area.

[0025] According to at least one embodiment, the grip area is at least partially free of adhesive. This prevents dirt from adhering to the grip area unintentionally. Furthermore, the grip area can be easily and reliably removed to detach the adhesive without leaving any residue. It is possible that the grip area is designed without adhesive from the outset. It is also possible that the grip area has the adhesive and 202404127

[0026] - 5 - an adhesion-reducing element is provided to reduce the adhesive strength of the bond in the grip area. For example, the bond in the grip area is covered by a non-adhesive layer that serves as an adhesion-reducing element.

[0027] According to further embodiments, the vehicle tire has multiple gripping areas. This makes it possible, for example, to apply forces to detach the adhesive at various points on the bond and the sound absorber.

[0028] According to one embodiment, a vehicle tire according to one of the preceding claims is provided for processing a vehicle tire. The gripping area is moved relative to the inner surface of the tire and / or the sound absorber. This loosens the adhesive bond. Thus, the sound absorber and its adhesive bond are detached from the inner surface of the tire. In particular, this leaves the adhesive bonded to the sound absorber, and the inner surface of the tire is as free as possible from adhesive residue after detachment.

[0029] Further advantages, features, and developments will become apparent from the following examples, which are explained in conjunction with the figures. Identical, similar, and equivalent elements can be marked with the same reference symbols across multiple figures. The figures and the relative sizes of the elements depicted within them are not to be considered to scale. Rather, individual elements may be exaggerated in size and / or thickness for better clarity and / or to improve representation.

[0030] They show:

[0031] Figure 1 shows a schematic representation of a cross-sectional view of a vehicle tire according to an exemplary embodiment.

[0032] Figure 2 is a schematic representation of a sectional view of a vehicle tire according to an exemplary embodiment, 202404127

[0033] - 6 -

[0034] Figures 3 to 6 are each schematic representations of a sectional view of a vehicle tire according to exemplary embodiments.

[0035] Figures 7 to 10 are schematic representations of an orientation of the reinforcing fibers according to exemplary embodiments.

[0036] Figures 11 and 12 are schematic representations of an adhesive bond with a grip area according to exemplary embodiments, and

[0037] Figures 13 and 14 are schematic representations of a part of a vehicle tire according to exemplary embodiments.

[0038] Figure 1 shows a schematic cross-sectional view of a vehicle tire 100 mounted on a rim 200. For example, the vehicle tire 100 and the rim 200 together form a wheel that is attached to a vehicle axle. During operation, the vehicle tire 100 rolls on a surface, with a tread 105 coming into contact with the surface. The tread 105 can also be referred to as the running surface.

[0039] The vehicle tire 100 surrounds a tire cavity 102, which is filled, for example, with air or another gas. The tire cavity 102 is bounded by the rim 200 and an inner surface 101 of the vehicle tire 100. In particular, the vehicle tire 100 has a tire body 106, on which the tread 105 is formed on one side and the inner surface 101 on the opposite side.

[0040] A sound absorber 120 is attached to an area on the inner sidewall 101 of the tire opposite the tread 105. The sound absorber 120 is made, for example, of polyurethane foam or another type of plastic foam. The sound absorber 120 is designed to dampen sound waves that may occur during the operation of the vehicle tire 100. For example, vibrations may occur. The vibrations and the resulting noise can be perceived as unpleasant. The sound absorber 120 reliably dampens the propagation of the 202404127

[0041] - 7 -

[0042] Sound. The sound absorber 120 can also be described as a sound-absorbing element, a sound-dampening element, or a sound-insulating element.

[0043] The sound absorber 120 is attached to the inside of the tire 101 by means of an adhesive 140. The sound absorber 120 is glued to the inside of the tire 101 by means of the adhesive layer 140. The sound absorber 120 is arranged in the tire cavity 102.

[0044] In particular, a top surface 121 of the sound absorber 120, which faces the inner surface of the tire 101, is in contact with the adhesive 140. The adhesive 140 is located between the top surface 121 and the inner surface of the tire 101. In the sectional view shown, the top surface 121 extends along a first direction 103, which can also be referred to as the transverse direction. The sound absorber 120 also extends along a second direction 104, which can also be referred to as the longitudinal direction. In particular, the sound absorber 120 extends significantly further along the second direction 104 than along the first direction 103. For example, the sound absorber 120 extends 1.5 meters or more along the second direction 104. Along the first direction 103, the sound absorber 120 has two opposing lateral sides 122.As can be seen, for example, in Figure 2, the sound absorber 120 has two opposing longitudinal ends 123 along the second direction 104. Several shorter sound absorbers 120 can be used, with the design being repeated as described.

[0045] A reinforcing structure 141 is arranged within the adhesive bond 140. The reinforcing structure is formed, in particular, from a plurality of reinforcing fibers 142, 143 (Figures 7 to 10). The reinforcing fibers 142, 143 are, for example, natural fibers, textile fibers, plastic fibers, or other fibers suitable for reinforcing the adhesive bond 140. For example, the fibers 142, 143 are made of polyester. Other materials are also possible. 202404127

[0046] - 8 -

[0047] The reinforcement structure 141 stabilizes the adhesive 140, particularly during its removal from the inner tire surface 101. To enable the tire body 106 to be recycled after use—for example, to reuse and / or repurpose the rubber or other materials of the tire body 106—the adhesive 140 is removed from the inner tire surface 101 together with the sound absorber 120. The adhesive and the sound absorber 120 remain adhered to each other, thus allowing the adhesive to be detached from the inner tire surface 101.

[0048] To reliably detach the sound absorber 120 together with the adhesive 140 from the inner surface of the tire 101, a gripping area 150 is provided. The gripping area 150 is coupled to the reinforcement structure 141, in particular directly connected to the reinforcement structure 141. For example, the gripping area 150 is designed as part of the reinforcement structure 141.

[0049] Figure 1 shows by way of example that the grip area 150 can be arranged on the lateral side 122 and projects laterally beyond the lateral side 122. In particular, the grip area 150 is implemented as a non-adhesive surface.

[0050] To detach the adhesive 140 and the sound absorber 120, the gripping area 150 is grasped, for example by a person or a machine. The gripping area 150 is moved away from the inner tire surface 101. The force applied is transferred to the reinforcement structure 141, so that the reinforcement structure 141, together with the adhesive 140, is detached from the inner tire surface. The reinforcement structure 141 serves to prevent the adhesive 140 from tearing unintentionally due to the applied force. The reinforcement structure 141 reliably distributes and transfers the detachment force, ensuring that the adhesive 140 can be detached from the inner tire surface 101 as completely as possible.

[0051] In the schematic representation according to Figure 1, the bonding 140 with variable

[0052] Thickness shown. The thickness of the adhesive 140 points along the first direction 103 202404127

[0053] - 9 - different values. The adhesive 140 is therefore of different thicknesses along the first direction 103.

[0054] According to further embodiments, the thickness of the adhesive 140 is constant along the first direction 103. The adhesive 140, the reinforcement structure 141 and the sound absorber 120 run in particular parallel to the inside 101 and are therefore curved.

[0055] Figure 2 shows a schematic representation of another exemplary position of the gripping area 150. For example, the gripping area 150 is arranged at one of the longitudinal ends 123. This makes it possible to detach the adhesive bond 140 with the reinforcement structure 141 from the inner tire surface 101 along the second direction 104. For example, a recess 124 is provided between the two longitudinal ends 123. The gripping area 150 is arranged in the recess 124 and can therefore be easily gripped.

[0056] Figures 3 to 5 show schematic representations of exemplary positions of the reinforcing structure 141 within the bonding 140. Along a third direction 107, which is oriented perpendicular to the first direction 103 and perpendicular to the second direction 104, the reinforcing structure 141 is arranged, for example, within the bonding 140, for instance in a central region, as shown in Figure 3. As shown in Figure 4, it is also possible for the reinforcing structure 141 to be arranged along the third direction 107 on a side of the bonding 140 adjacent to the top surface 121 of the sound absorber 120. Thus, the reinforcing structure 141 is, for example, arranged significantly closer to the sound absorber 120 than to the inner surface 101 of the tire.

[0057] As shown in Figure 5, it is also possible that the reinforcement structure 141 is located much closer to the inner surface of the tire 101 than to the sound absorber 120. For example, the reinforcement structure 141 is located on the inner surface of the tire 101.

[0058] It is also possible that more than one reinforcement structure 141 is planned. 202404127

[0059] - 10 -

[0060] For example, two or more reinforcement structures 141 are provided, which are stacked along the third direction 107 in the bonding 104.

[0061] In figures 3 to 5, the grip area 150 is shown projecting along the lateral side 122 in the first direction 103.

[0062] Figure 6 shows a schematic representation of another exemplary embodiment of the grip area 150. In the embodiment according to Figure 6, the grip area 150 is arranged between the inner tire surface 101 and the sound absorber 120 and, in particular, does not protrude on the lateral side 122. In the embodiment of Figure 6, the reinforcement structure 141 and the grip areas 150 are shown adjacent to the inner tire surface 101. Of course, other positions in the bonding 140 are also possible, corresponding to the explanations in connection with Figures 3 to 5.

[0063] Figure 6 shows grip areas 150 on both lateral sides 122. Of course, it is also possible that the grip area 150 is provided on only one of the lateral sides 122.

[0064] For example, the grip area 150, which is formed in the area of ​​the bonding, is implemented as a non-adhesive area. This can be gripped laterally, for example with a tool such as a spatula or similar. Thus, the force required to detach the bonding 140 can be applied to the grip area 150. The protruding grip area 150 can be omitted, so that no additional elements are arranged in the tire cavity 102.

[0065] Figures 7 to 10 show examples of the design of the reinforcement structure 141 .

[0066] For example, the reinforcing fibers 142 are arranged in the same direction, in particular parallel to each other, along the second direction 104 in the adhesive bond 140. The reinforcing fibers 142 can be spaced further apart along the first direction 103 (Figure 7) or arranged closer together (Figure 8). 202404127

[0067] - 11 -

[0068] It is possible that the reinforcing fibers 142, 143 are arranged in a net-like pattern, as shown in Figure 9. For example, the reinforcing fibers 142 extend along the fourth direction and the reinforcing fibers 143 along the third direction.

[0069] Figure 10 shows an example of an arbitrary, in particular random, arrangement of the reinforcing fibers 142. The reinforcing fibers 142 are mixed into the adhesive of the bonding compound 140 and form the reinforcing structure 141. This is sufficient to stabilize the bonding compound 140 so that it reliably holds together during removal from the inner tire surface 101.

[0070] Figure 11 shows a schematic representation of the sound absorber 120 with the bonding element 140 and the grip area 150. For example, the grip area 150 is located at the longitudinal end 123. The bonding element 140 with the reinforcing structure 141 extends beyond the longitudinal end 123, so that the bonding element 140 with the reinforcing structure 141 projects beyond the longitudinal end 123. This projecting area is covered with adhesion-reducing elements 151 on the top and bottom surfaces. The adhesion-reducing elements are, for example, non-adhesive plastic or paper strips. The adhesion-reducing elements 151 are bonded to the bonding element and are non-adhesive on the sides facing away from the bonding element 140. Thus, it is possible to design the grip area 150 to be non-adhesive.The non-adhesive design using the adhesion-reducing elements 151 is of course also possible in the embodiments of the grip area 150 in which the grip area 150 is arranged laterally on the lateral side 122.

[0071] Figure 12 shows a schematic representation of another embodiment in which only one side of the projecting area of ​​the adhesive bond 140 with the reinforcing structure 141 is covered with the adhesion-reducing element 151. The free side of the adhesive bond 140 is bonded to the longitudinal end 123 of the sound absorber 120. Thus, the grip area 150 is firmly fixed to the sound absorber 120, and exposed areas are avoided. Therefore, the grip area 150 is well protected from contamination and / or damage during the operation of the vehicle tire before recycling. 202404127

[0072] - 12 -

[0073] The design of the grip area 150 with the adhesion-reducing element on only one side is of course also possible in the designs in which the grip area 150 is arranged on the lateral side 122.

[0074] Figure 13 shows a schematic representation of the vehicle tire 100 according to a further embodiment.

[0075] The sound absorber 120 is arranged on the inner side 101 of the tire. The recess 124 is provided, extending completely along the first direction 103 between the two lateral sides 122. The sound absorber 120 is completely interrupted at the recess 124.

[0076] The reinforcement structure 140 extends through the recess 124. In particular, the reinforcing fibers 142 extend across the recess 124 along the second direction 104. Within the recess 124, the reinforcing fibers 143 extend along the first direction 103. The gripping area 150 is formed on the reinforcing fibers 143. For example, the gripping area 150 is formed as a bundle of the reinforcing fibers 143. The gripping area 150 is accessible through the recess 124. The reinforcing fibers 143 are arranged between the inner tire surface 101 and the reinforcing fibers 142. In particular, the reinforcing fibers 142 and the reinforcing fibers 143 are connected to each other, for example, by adhesive bonding. To remove the adhesive 140, it is possible to grasp the grip area 150 and pull it away from the inside of the tire 101.This force is transferred via the reinforcing fibers 143 to the reinforcing fibers 142, which then detach the adhesive 140 together with the sound absorber 120 from the inner tire 101. The gripping area 150 can, for example, be designed as a loop as shown in Figures 13 and 14, or by an area that does not adhere to or bond with the inner tire 101.

[0077] Figure 14 shows a schematic representation of the vehicle tire 100 according to a further embodiment. This corresponds essentially to the embodiment according to Figure 13. In contrast to Figure 13, the recess 202404127

[0078] - 13 -

[0079] The recess 124, as shown in Figure 14, is completely enclosed by the sound absorber 120. The recess 124 is surrounded on all sides by the sound absorber 120 along the first direction 103 and the second direction 104, and extends through the sound absorber 120 along the third direction 107.

[0080] The grip area 150 is accessible through the recess 124. Along the first direction, the reinforcing fibers 142 are arranged below the sound absorber 120, in contrast to Figure 13, so that the detachment force from the reinforcing fibers 143 is transferred directly to both the reinforcing fibers 142 and the sound absorber 120.

[0081] The bonding 140, according to the various embodiments, enables reliable adhesion of the sound absorber 120 during operation of the vehicle tire 100. The bonding 140 comprises, for example, an adhesive tape or other adhesive. At the end of its service life, the tire body 106 can be recycled in a single-material or nearly single-material manner without excessive residue from the bonding 140 impairing the recycling process and, for example, damaging the recycling machines. It is possible to separate the material of the sound absorber 120, for example, polyurethane, from the material of the tire body 106, so that the materials are not mixed as much as possible during the recycling process.

[0082] The reinforcement structure 141 is particularly strongly bonded to the adhesive 140 and especially strongly bonded to the grip area 150. When the grip area 150 is pulled, the adhesive 140 is detached from the inner tire surface 101 along with the adhesive structure 141. The reinforcement structure 141 prevents large tears in the adhesive 140. The reinforcing fibers 142, 143 of the reinforcement structure 141 can be arranged in any order and length, and can also be woven, knitted, or otherwise bonded together. In particular, at least three reinforcing fibers 142 are provided. The adhesion-reducing element can be designed as a covering, a layer, a lubricant, or other substances that reduce or mask the adhesive force of the adhesive 140. 202404127

[0083] - 14 -

[0084] The vehicle tire 100 with the adhesive 140, which has the reinforcement structure 141, enables both a reliable adhesion of the sound absorber 120 to the inside of the tire 101 during the operation of the vehicle tire 100 and a reliable removal of the adhesive 140 at the end of its service life in order to recycle the materials of the vehicle tire 100.

[0085] 202404127

[0086] - 15 -

[0087] Reference sign

[0088] 100 vehicle tires

[0089] 101 Tire inside

[0090] 102 Tire cavity

[0091] 103 first direction

[0092] 104 second direction

[0093] 105 treads

[0094] 106 tire bodies

[0095] 107 third direction

[0096] 120 sound absorbers

[0097] 121 Top

[0098] 122 lateral side

[0099] 123 longitudinal end

[0100] 124 Exclusion

[0101] 140 Bonding

[0102] 141 Reinforcement structure

[0103] 142 Reinforcing fiber

[0104] 143 Reinforcing fiber

[0105] 150 grip area

[0106] 151 adhesion-reducing element

[0107] 200 rim

Claims

202404127 - 16 - Patent claims 1. Vehicle tires (100), having - a tire inner surface (101) that surrounds a tire cavity (102), - a sound absorber (120), - an adhesive bond (140), wherein the sound absorber (120) is attached to the inner surface (101) of the tire by means of the adhesive bond (140), and wherein the adhesive bond (140) has a reinforcing structure (141), - a grip area (150) coupled to the reinforcement structure (141) to release the adhesive (140) from the inner surface of the tire (101) by means of a movement of the grip area (150).

2. Vehicle range according to claim 1, wherein the reinforcement structure (141) comprises a plurality of reinforcing fibers (142, 143).

3. Vehicle tire according to one of the preceding claims, wherein the grip area (150) is arranged laterally next to the sound absorber (120).

4. Vehicle tire according to one of the preceding claims, wherein the grip area (150) is arranged between the inner surface of the tire (101) and the sound absorber (120).

5. Vehicle tire according to one of the preceding claims, wherein the grip area (150) is arranged at a longitudinal end (123) of the sound absorber (120).

6. Vehicle tire according to one of the preceding claims, wherein the sound absorber (120) has a recess (124) through which the grip area (150) is accessible.

7. Vehicle tire according to one of the preceding claims, wherein the grip area (150) is at least partially free of adhesive. 202404127 - 17 - 8. A vehicle tire according to any one of claims 1 to 6, wherein an adhesion-reducing element (151) is provided in the grip area (150) to reduce the adhesive force of the bond (140) on the grip area (150).

9. A vehicle tire according to any one of the preceding claims, comprising a Multiple grip areas (150).

10. Method for processing a vehicle tire, comprising: - Providing a vehicle tire (100) according to one of the preceding claims, - Moving the grip area (150) relative to the inner side of the tire (101) and / or the Sound absorber (120), and thereby - Loosening the adhesive (140), and - Detaching the sound absorber (120) with the adhesive (140) from the inside of the tire (101).

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