TPE conveyor belts having upper and lower sides made of different TPE materials or a multi-layer combination thereof for meeting complex application requirements

Abstract

The invention relates to a conveyor belt, which comprises a single-layer or multi-layer upper cover plate for the carrying side, a single-layer or multi-layer lower cover plate for the running side, and a carcass having one or more tension members between the upper cover plate and the lower cover plate, wherein the upper cover plate is made of one or more thermoplastic elastomers (TPE) and has a thickness in the range from 1.0 mm to 50 mm and the lower cover plate is formed from one or more thermoplastic elastomers (TPE) and has a thickness in the range from 1.0 mm to 30 mm, wherein at least one thermoplastic elastomer is contained only in the upper cover plate or only in the lower cover plate. The conveyor belt is suitable above all for industrial or mining applications, in particular for heavy-duty applications, and / or for a troughed belt conveyor.

Description

[0001] 202400230

[0002] 1

[0003] Description

[0004] TPE conveyor belts with top and bottom layers made of different TPE materials or their multi-layered combination to meet complex application requirements

[0005] Technical field

[0006] The invention relates to the field of conveyor belts, in particular textile conveyor belts, for industrial or mining applications, especially for heavy-duty applications, their use and a conveyor belt system comprising the conveyor belt, in particular a trough belt conveyor, wherein the conveyor belts are in particular TPE conveyor belts.

[0007] State of the art

[0008] Conveyor belts for transporting goods generally consist of an upper cover plate for the load-bearing side, a lower cover plate for the running side, and a carcass with one or more tension members between the upper and lower cover plates. The upper and lower cover plates are made of materials such as elastomers, PVC, or polyurethane. However, conveyor belts with upper and lower cover plates made of thermoplastic elastomer (TPE) are also known; these are referred to as TPE conveyor belts.

[0009] Generally, the top and bottom layers of TPE conveyor belts are made from the same type of TPE. Typical TPE conveyor belts are used in light industries (food processing, warehouses, supermarkets, airports, etc.) and very rarely in heavy industry or mining, where complex (combined) tasks need to be performed. In the vast majority of cases, TPE conveyor belts have a nominal tensile strength of k_N < 100 N / mm and TPE cover layer thicknesses of t_c < 1 mm. There are examples on the market where the cover layer consists of a very thin TPE layer and a thick rubber layer.

[0010] As already mentioned, TPE conveyor belts are state-of-the-art for transporting lightweight materials with low mass capacities compared to 202400230

[0011] 2

[0012] Applications include heavy industry and mining. Exceptions are the aforementioned conveyor belts, where the top layer consists of a combination of TPE and rubber layers.

[0013] Conveyor belts for transporting lightweight materials with low mass capacities do not require a trough shape to accommodate large quantities of coarse bulk materials. They are also not exposed to fluctuating harsh environmental conditions (temperature, dust, water, etc.). In most cases, the center-to-center distance (CC) of conveyor systems using typical TPE conveyor belts is no more than approximately 10 m.

[0014] Consequently, the operating conditions and requirements for TPE conveyor belts in heavy industry or mining are completely different from those in their typical applications. TPE conveyor belts for heavy industry and mining operate in harsh environments, such as temperatures ranging from -60°C to +200°C, and exhibit significantly higher tensile strength (>400 N / mm² to 10,000 N / mm² vs. typically max. 100 N / mm²) and cover plate thickness (>2 to 20 mm vs. typically <1 mm). In most cases, they are also troughed during operation (e.g., with an angle ranging from 10° to 45°), whereas typical TPE conveyor belts are flat. They are also designed to be suitable for conveying distances from a few meters to many dozens of kilometers. This complexity requires a special approach to the design of TPE conveyor belts for heavy industry and mining applications, particularly in the selection of cover plates.

[0015] TPEs with excellent mechanical properties, which can be used for cover plates for transporting abrasive or mechanically stressed bulk materials, typically have a high hardness (e.g. a Shore A hardness of approximately 80 to 90 A-Shore) and a high flexural stiffness, which, however, leads to a reduced troughing ability at sub-zero temperatures, especially in the case of narrow strips.

[0016] Long-distance conveyor systems for mining require a bottom cover plate that reduces rolling resistance when a conveyor belt is pulled over guide or support rollers, deflection rollers, and drive drums of a conveyor system, thereby consuming energy. Specific properties of the bottom cover plate are intended to... 202400230

[0017] 3

[0018] Reduce the rolling resistance of a conveyor belt and lead to lower energy consumption of the entire conveyor system.

[0019] Typical TPE conveyor belts used for transporting food, chemicals, materials in warehouses, supermarkets or airports do not require such special properties due to the completely different application conditions.

[0020] Description of the invention

[0021] Accordingly, the object of the invention was to provide conveyor belts, in particular TPE conveyor belts, that are suitable for heavy-duty applications in the field of industry (heavy industry) or mining and that can be adapted to the specific requirements.

[0022] The inventors have determined that the task can be accomplished by using specific thicknesses of the cover layers and by selecting different thermoplastic elastomers in the lower and upper cover layers.

[0023] Accordingly, the invention relates to a conveyor belt comprising a single- or multi-layered upper cover plate for the load-bearing side, a single- or multi-layered lower cover plate for the running side, and a carcass with one or more tensile members between the upper cover plate and the lower cover plate, wherein the upper cover plate is formed from one or more thermoplastic elastomers (TPE) and has a thickness in the range of 1.0 mm to 50 mm, and the lower cover plate is formed from one or more thermoplastic elastomers (TPE) and has a thickness in the range of 1.0 mm to 30 mm, and wherein at least one thermoplastic elastomer is included only in the upper cover plate or only in the lower cover plate.

[0024] In particular, different TPE materials were combined for the top and bottom cover plates to achieve the desired properties for the respective application. The selection of one or more TPEs for the top cover plate differs from the selection for the bottom cover plate; that is, at least one TPE in the top or bottom cover plate is different from 202400230.

[0025] 4. one or more TPEs that are contained in the other cover plate. In other words, at least one thermoplastic elastomer is contained only in the top cover plate or only in the bottom cover plate.

[0026] In this way, the upper cover plate and the lower cover plate can each be independently adapted to the different requirements for the load-bearing side and the running side of the conveyor belt.

[0027] Long-distance conveyor systems for mining require a bottom cover plate to reduce indentation rolling resistance when a conveyor belt is pulled over the deflection or idler rollers of a conveyor system, thereby consuming energy. Specific properties of the bottom cover plate are intended to reduce the indentation rolling resistance of a conveyor belt and thus lead to lower energy consumption of the entire conveyor system. This property of low indentation rolling resistance can be achieved by using a TPE for the bottom cover plate. The top cover plate of the belt can be made from a TPE or a combination of TPEs that exhibits, for example, high tensile strength and elongation at break, high wear and abrasion resistance, and low flexural stiffness.

[0028] The invention is described in more detail below.

[0029] The conveyor belt according to the invention has a single- or multi-layer upper cover plate for the load-bearing side, a single- or multi-layer lower cover plate for the running side and a carcass with one or more tension members between the upper cover plate and the lower cover plate.

[0030] The conveyor belt can generally be used as an endless belt running on support rollers or guide rails, serving simultaneously as a load-bearing and traction element. The upper cover plate represents the load-bearing side of the conveyor belt, on which the conveyed material is supported and transported. The lower cover plate represents the running side of the conveyor belt, which may be in contact with the drive system, in particular a drive drum or drum, as well as support, deflection, and / or guide rollers of the conveyor system. 202400230

[0031] 5

[0032] The upper cover plate for the load-bearing side is formed in one or more layers, with the upper cover plate preferably being single-layered or double-layered. The lower cover plate for the running side is formed in one or more layers, with the lower cover plate preferably being single-layered or double-layered.

[0033] If the top or bottom cover plate is multi-layered, e.g., two-layered, the layer facing the environment is called the outer layer. The other layers, facing the carcass, are called the inner layer. The outer layer of the bottom cover plate could also be called the bottom layer, and the outer layer of the top cover plate the top layer.

[0034] The conveyor belt according to the invention can, for example, have a single-layer upper cover plate and a single-layer lower cover plate. In an alternative embodiment, the conveyor belt has a two-layer upper cover plate and a single-layer lower cover plate. In a further alternative embodiment, the conveyor belt has a single-layer upper cover plate and a two-layer lower cover plate. In a further alternative embodiment, the conveyor belt has a two-layer upper cover plate and a two-layer lower cover plate.

[0035] The upper cover plate has a thickness in the range of 1.0 mm to 50 mm. Preferably, the upper cover plate has a thickness in the range of 2.0 mm to 30 mm. The lower cover plate has a thickness in the range of 1.0 mm to 30 mm. Preferably, the lower cover plate has a thickness in the range of 1.5 mm to 10 mm.

[0036] It is generally preferred that the upper cover plate is thicker than the lower cover plate. In a preferred embodiment, the thickness of the lower cover plate is 25 to 70%, preferably 30 to 55%, of the thickness of the upper cover plate.

[0037] The total thickness of the conveyor belt according to the invention can be, for example, in the range of 2 to 100 mm, preferably from 3 to 60 mm.

[0038] Both the upper and lower cover plates are each independently formed from one or more thermoplastic elastomers (TPEs). These TPEs are special plastics comparable to the classic 202400230

[0039] 6

[0040] Elastomers behave in a thermoplastic manner, but can be plastically deformed under heat and thus also exhibit thermoplastic behavior.

[0041] If the top cover plate is single-layered, it can be made of one or more TPEs. However, it is generally preferred that the single-layer top cover plate be made of a single TPE. Similarly, in the case of a two- or multi-layer top cover plate, particularly a two-layer top cover plate, each layer can be made of one or more TPEs. However, it is preferred that each layer be made of a different TPE, which can be the same or preferably different for each layer. In the case of a two-layer top cover plate, both layers are preferably made of a single TPE, with the TPE of one layer being different from the TPE of the other layer. This also applies, of course, to the preferred TPEs mentioned below.

[0042] If the bottom cover plate is single-layered, it can be made of one or more TPEs. However, it is generally preferred that the single-layer bottom cover plate be made of a single TPE. Similarly, in the case of a two- or multi-layer bottom cover plate, particularly a two-layer bottom cover plate, each layer can be made of one or more TPEs. However, it is preferred that each layer be made of a different TPE, which can be the same or preferably different for each layer. In the case of a two-layer bottom cover plate, both layers are preferably made of a single TPE, with the TPE of one layer being different from the TPE of the other layer. This also applies, of course, to the preferred TPEs mentioned below.

[0043] The one or more thermoplastic elastomers for the top cover plate and the bottom cover plate are each selected independently of one another, preferably from thermoplastic polyurethanes (TPU), thermoplastic vulcanizates (TPV), thermoplastic polyolefins (TPO), PVC-NBR blends, flexible PVC, or a combination thereof. PVC is polyvinyl chloride. NBR is acrylonitrile butadiene rubber. Flexible PVC is PVC containing plasticizers.

[0044] Thermoplastic polyurethanes are based on the reaction of polyisocyanates, especially diisocyanates, with diols, such as polyester polyols or 202400230

[0045] 7

[0046] Polyether polyols. Examples of suitable thermoplastic polyurethanes are those based on a polyether polyol, preferably polytetramethylene glycol, or a polyester polyol as the polyol component. Particularly advantageous polyester polyols are, for example, adipate-based polyester polyols, especially in the form of polybutylene adipate, or polycaprolactone-based polyester polyols. To produce the respective thermoplastic polyurethanes, the polyols are reacted with a polyisocyanate or a mixture of polyisocyanates, wherein the polyisocyanate preferably consists of aromatic polyisocyanates, especially aromatic diisocyanates. Particularly preferred aromatic polyisocyanates for the production of thermoplastic polyurethanes for use in the invention are toluene diisocyanate (TDI), methylene diisocyanate (MDI), or mixtures thereof.

[0047] A thermoplastic vulcanizate (TPV) is typically produced by mixing a thermoplastic polymer and a rubber polymer, with the rubber being vulcanized simultaneously during the mixing process. This is known as dynamic vulcanization. The thermoplastic polymer can be, for example, a polyolefin such as polyethylene (PE) or, preferably, polypropylene (PP). The rubber polymer can be, for example, ethylene propylene diene monomer (EPDM) rubber. The TPV is preferably a dynamic vulcanizate of EPDM and PP, i.e., formed by the dynamic vulcanization of a mixture of EPDM and PP. In such mixtures, the EPDM is preferably present in an amount of 30 to 70 parts and the PP preferably in an amount of 20 to 60 parts.

[0048] Thus, in a preferred embodiment, one or more thermoplastic elastomers of the upper cover layer are selected from one or more thermoplastic polyurethanes (TPU), one or more thermoplastic vulcanizates (TPV), one or more thermoplastic polyolefins (TPO), one or more PVC-NBR blends, one or more flexible PVCs, or a combination thereof, and / or one or more thermoplastic elastomers of the lower cover layer are selected from one or more thermoplastic polyurethanes (TPU), one or more thermoplastic vulcanizates (TPV), one or more thermoplastic polyolefins (TPO), one or more PVC-NBR blends, one or more flexible PVCs, or a combination thereof. 202400230

[0049] 8

[0050] In the conveyor belt according to the invention, at least one thermoplastic elastomer is contained only in the upper cover plate or only in the lower cover plate. That is, the selection of the thermoplastic elastomer(s) in the upper and lower cover plates differs in at least one thermoplastic elastomer. The thermoplastic elastomers can differ in type or other characteristics, such as the type and quantity of monomers contained, the degree of crosslinking, the average molecular weight, the molecular weight distribution, etc. These differences are particularly noticeable in the different parameters of the TPE. For example, there are many different TPUs, such as the TPE-1 to TPE-4 used in the examples, which differ, for example, in their mechanical and / or other properties.By selecting different TPEs in the upper and lower cover plates, the conveyor belts can be specifically adapted to the respective applications according to the invention.

[0051] The thermoplastic elastomers may contain additives that are common in the field. Examples of such additives include fillers, e.g., for increased electrical conductivity, colorants, stabilizers, or antioxidants.

[0052] The carcass, with one or more tensile members, serves to transmit the tensile forces generated in the conveyor belt and gives the conveyor belt the necessary load-bearing capacity and impact and tear resistance. Steel cables or textile layers are particularly suitable as tensile members. Conveyor belts with steel cables as tensile members are called steel cable conveyor belts. Conveyor belts with textile layers as tensile members are called textile conveyor belts. The conveyor belt according to the invention is preferably a textile conveyor belt.

[0053] The material for the tension members is not subject to any relevant restrictions and includes, for example, steel cables, UHMWPE cords, or textile layers. If the tension members are made of cords or cables, they are regularly arranged parallel to each other in the carcass in the longitudinal direction of the conveyor belt. If the tension member(s) are textile layers, one or more textile layers can be arranged on top of each other. 202400230

[0054] 9

[0055] The textile layer can be, for example, a woven fabric. The textile layer, preferably a woven fabric, can be made, for example, from yarns of polyolefins, in particular polyethylene, including UHMWPE, and / or polypropylene, polyesters, polyamides, polyaramid, polyoxadiazole, cotton, or combinations thereof. UHMWPE (ultra-high molecular weight PE) is ultra-high molecular weight polyethylene.

[0056] UHMWPE typically has a mean molecular weight Mw of at least 1,000,000 g / mol, preferably of 2,000,000 to 6,000,000 g / mol.

[0057] In a preferred embodiment, the textile layer comprises a polyolefin, in particular polyethylene (PE) or UHMWPE, and / or polypropylene (PP). In a particularly preferred embodiment, the textile layer comprises a polyolefin yarn, in particular a UHMWPE yarn, in the warp direction. A different yarn, e.g., a PP yarn, can also be used as the weft yarn.

[0058] The conveyor belt according to the invention is therefore preferably a textile conveyor belt in which one or more tensile members of the carcass are one or more textile layers. The textile layers are preferably a woven fabric. The textile layers, particularly in the form of one or more woven fabrics, preferably comprise a polyolefin yarn, especially a UHMWPE yarn.

[0059] The tensile members, whether in the form of cord inlays or textile layers, are typically embedded in a matrix material. This matrix material is usually an elastomer and can be a rubber elastomer, a thermoplastic elastomer, a combination of both, or even a combination of thermoplastic and thermoplastic elastomer. During the manufacturing process, adhesives based on rubber elastomer, thermoplastic elastomer, or a combination of both are typically used to bond the tensile members to the upper and lower cover plates.

[0060] In a preferred embodiment, the matrix material is also formed from a thermoplastic elastomer. For this purpose, TPE adhesives, e.g., in the form of a hot melt adhesive or a liquid reactive adhesive, can be applied to the tensile members, such as the textile layers. 202400230

[0061] 10

[0062] The conveyor belt according to the invention may optionally include further components that are common in the field. For example, the conveyor belt may have a rubber edge protector that protects the tension members laterally. Optionally, one or more further layers, e.g., made of elastomeric material, may also be arranged between the carcass and the upper cover plate and / or the lower cover plate.

[0063] The surface of the upper cover plate can be smooth or patterned or profiled. Examples of patterns or profiles include herringbone, angled cams, lugs, or a chevron profile. The surface of the lower cover plate can be smooth or patterned or profiled. The pattern or profile could be, for example, a wedge guide.

[0064] The width of conveyor belts can vary widely and be adapted to the specific application. For example, the width of a conveyor belt can range from 100 mm to 7000 mm.

[0065] The conveyor belts according to the invention are particularly suitable for medium-length transport distances (greater than 10 m) and long-distance transport distances (at least 1 km). The conveyor belt according to the invention is therefore preferably designed for a center-to-center distance of more than 10 m, preferably between 50 m and 1000 m. In one embodiment, the conveyor belt is designed for a center-to-center distance of at least 100 m. The center-to-center distance, also referred to as CC distance (center-to-center), is the distance between the axes of the most widely separated belt deflections (generally, the CC distance is the distance between a tail drum and a drive drum of a conveyor system). The belt length, as the inner circumference of the endless, unstretched belt, is determined from this only by taking into account the drum diameters and any belt loops that may be present, e.g., in a tensioning station.

[0066] The conveyor belt can be laid flat or troughed using multi-section support rollers. The troughing allows for a higher material flow and improves belt guidance. The conveyor belt is particularly suitable for operation in trough configuration. 202400230

[0067] 11

[0068] The conveyor belt according to the invention is therefore preferably designed for operation in a troughed configuration. The conveyor belt itself is flat and is only troughed by support rollers within a conveyor system. The troughing can be two-part, three-part, or more-part. The flexural stiffness of the conveyor belt is an important parameter for its ability to form a trough.

[0069] The measurement methods used for the following parameters for the TPE are listed in the example section.

[0070] In a preferred embodiment i), the upper cover plate of the conveyor belt according to the invention is formed in a single layer, wherein the upper cover plate is made of a TPE, preferably a TPU, which has a tensile strength of at least 50 MPa, an elongation at break of at least 450% and an abrasion of at most 50 mm. 3 The TPE preferably has a tensile strength of at least 50 MPa, an elongation at break of at least 450%, and an abrasion resistance of no more than 50 mm. 3 The TPEs have a Shore A hardness of at most 90 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C. In special applications, TPEs with a glass transition temperature Tg of not less than -70°C are used.

[0071] In a further preferred embodiment ii), the upper cover plate of the conveyor belt according to the invention is formed in two layers with an inner layer and an outer layer, wherein iia) the inner layer is formed from a TPE, preferably a TPU, wherein the TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 450% and an abrasion of at most 50 mm 3 exhibiting, wherein the TPE particularly preferably has a tensile strength of at least 50 MPa, an elongation at break of at least 450%, and an abrasion of no more than 50 mm 3 , has a Shore A hardness of at most 86 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C up to Tg of -70°C, and üb) the outer layer is formed from a TPE, preferably a TPU, wherein the TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 500% and an abrasion resistance of at most 40 mm 3exhibiting, wherein the TPE preferably has a tensile strength of at least 50 MPa, an elongation at break of at least 202400230

[0072] 12

[0073] 500%, a maximum abrasion of 40 mm 3 , having a Shore A hardness of at most 90 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C, and wherein the TPE of the outer layer has a higher tensile strength and a higher elongation at break than the TPE of the inner layer.

[0074] In the two-part embodiment ii) of the upper cover plate, it is preferred that the inner layer is thicker than the outer layer. The thickness of the inner layer can, for example, be 55 to 75% or 60 to 72% of the total thickness of the upper cover plate.

[0075] Suitable TPEs for the embodiments i) and ii) mentioned above are the aforementioned thermoplastic elastomers, in particular thermoplastic polyurethanes, such as polyester-based thermoplastic polyurethanes and polyester-based thermoplastic polyurethanes. Specific examples are the materials TPE-1 and TPE-2 mentioned in the example section.

[0076] The aforementioned embodiments i) and ii) for the upper cover plate are particularly suitable for transporting abrasive materials, such as sand or iron pellets, or coarse and mechanically demanding bulk materials, such as ores or overburden. Embodiments i) and ii) offer high cut and gouge resistance and abrasion resistance, which is particularly important in these applications and can significantly increase service life. Due to the low glass transition temperature of the TPE used, the excellent mechanical properties are retained even at low temperatures. This also applies to the low flexural stiffness at low temperatures, which is important for the troughing capability.

[0077] In a further preferred embodiment, the TPE, in particular TPU, of the upper cover plate in a single-layer configuration or of the outer layer of the upper cover plate in a multi-layer configuration has a high static coefficient of friction, such as at least 1.00, preferably at least 1.50. Such an embodiment is particularly advantageous for inclined conveyor belts, as slippage of the bulk material during transport is prevented or reduced. If the TPE used, in particular TPU, also has a high 202400230

[0078] 13

[0079] If the material has a melting point, e.g., at least 190°C, preferably at least 200°C, thermal damage to the top cover plate can be reduced or avoided when the transported materials are at a high temperature. A specific example of a suitable TPE is the material TPE-2 mentioned in the example section.

[0080] In a further preferred embodiment iii), the upper cover plate of the conveyor belt according to the invention is formed in a single layer and is made of a thermoplastic vulcanizate (TPV). TPV is characterized by good oil resistance and good dirt-repellent properties (i.e., cleanability). This embodiment is particularly suitable for the transport of dirty, sticky, and / or oily bulk materials, such as those typical in the process industry. A specific example is the material TPE-5 mentioned in the example section. Alternatively, the material TPE-4, which also possesses good oil resistance and good dirt-repellent properties (i.e., cleanability), can be considered. TPV, such as TPE-5, and TPE-4 are therefore particularly suitable for dirty, sticky, and / or oily bulk materials.

[0081] In a preferred embodiment i), the lower cover plate of the conveyor belt according to the invention is formed in a single layer and is made of a TPE, preferably a TPU, wherein the TPE has a static coefficient of friction of at least 1.00, preferably at least 1.50, and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C.

[0082] Such an embodiment is suitable for ensuring effective transmission of torque from a drive drum of a conveyor system to the conveyor belt. A specific example of a suitable TPE is the material TPE-2 mentioned in the example section.

[0083] In a further preferred embodiment ii) the lower cover plate of the conveyor belt according to the invention is designed as a single layer or as a double layer with an inner layer and an outer layer, wherein in the single-layer embodiment the single layer 202400230

[0084] 14 and in the two-layer version the outer layer is made of a thermoplastic vulcanizate (TPV).

[0085] The TPV is characterized by a relatively low rolling friction factor (RFF) over a wide temperature range (see Fig. 2). The RFF determines the indentation rolling resistance (IRR) for a bottom cover plate, which constitutes a significant portion of the total resistance to motion of a conveyor belt. For horizontal or slightly inclined conveyors with a center-to-center distance (C-C) of 1000 m or more (long-distance conveyors), the indentation rolling resistance contributes 60 to 70% of the total resistance to motion of a conveyor system.

[0086] The embodiment ii) of the lower cover plate is therefore particularly advantageous from the perspective of economical energy consumption and is thus especially suitable for long-distance conveyors. A specific example is the TPE-5 mentioned in the example section. An alternative TPE is TPE-4, which is also characterized by a relatively low RFF over a wide temperature range (see Fig. 2).

[0087] As mentioned, the conveyor belt can be well adapted to the respective applications by selecting different TPEs for the upper and lower cover plates. Preferred embodiments are described below. In all cases mentioned, the conveyor belt is preferably a textile conveyor belt.

[0088] In a preferred embodiment, the conveyor belt according to the invention has a configuration a) in which a) the upper cover plate is formed in two layers with an inner layer and an outer layer, and the lower cover plate is formed in a single layer, wherein the lower cover plate and the inner layer of the upper cover plate are each formed from a first TPE, preferably TPU, and the outer layer of the upper cover plate is formed from a second TPE, preferably TPU, which is different from the first TPE, wherein the first TPE has a static coefficient of friction of at least 1.00, preferably at least 1.50, and a glass transition temperature Tg of not less than -20°C, preferably not less than 202400230

[0089] 15

[0090] -40°C to Tg of -70°C, wherein the second TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 500% and an abrasion of no more than 40 mm 3 the second TPE preferably has a Shore A hardness of at most 90 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C.

[0091] A specific example of the first TPE is TPE-2 mentioned in the example section, and of the second TPE, TPE-1 mentioned in the example section. A specific embodiment of configuration a) is described in Example 1. The advantages of the insert materials for the upper and lower cover plates and of the overall configuration are explained above and below in the example section, to which reference is made.

[0092] In a further preferred embodiment, the conveyor belt according to the invention has a configuration b) in which the upper cover plate and the lower cover plate are formed in a single layer, wherein the lower cover plate is formed from a first TPE, preferably TPU, and the upper cover plate is formed from a second TPE that is different from the first TPE, wherein the first TPE has a static coefficient of friction of at least 1.00, preferably at least 1.50, and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C, and the second TPE is a thermoplastic vulcanizate (TPV).

[0093] A specific example of the first TPE is TPE-2 mentioned in the example section, and of the second TPE (TPV), TPE-5 is mentioned in the example section. A specific embodiment of configuration b) is described in Example 2. The advantages of the insert materials for the upper and lower cover plates and of the overall configuration are explained above and below in the example section, to which reference is made. In an alternative embodiment with corresponding advantages, TPU TPE-4 can be used as the material for the upper cover plate instead of TPV such as TPE-5, since TPE-4 also has good oil resistance and good dirt-repellent properties (i.e., cleanability). 202400230

[0094] 16

[0095] In a further preferred embodiment, the conveyor belt according to the invention has a configuration c) in which the upper cover plate is formed as a single layer and the lower cover plate is formed as a single layer or as a double layer with an inner layer and an outer layer, wherein, if the lower cover plate is formed as a single layer, the lower cover plate, and, if the lower cover plate is formed as a double layer, the outer layer, is formed from a first TPE, and the upper cover plate is formed from a second TPE, preferably TPU, which is different from the first TPE, wherein the first TPE is a thermoplastic vulcanizate (TPV) and the second TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 450% and an abrasion of at most 50 mm 3the second TPE preferably has a Shore A hardness of at most 90 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C.

[0096] A specific example of the first TPE (TPV) is TPE-5 mentioned in the example section, and for the second TPE, TPE-1 and TPE-2 mentioned in the example section. Specific embodiments of configurations c) are described in Examples 3 and 4 and in Figures 5, 6, and 7. The advantages of the insert materials for the upper and lower cover plates and of the overall configuration are explained above and below in the example section, to which reference is made.

[0097] The invention further relates to the use of the conveyor belt according to the invention as described above for industrial or mining applications, in particular for heavy-duty applications, and / or for a trough belt conveyor.

[0098] The conveyor belt according to the invention is particularly suitable for heavy-duty applications in industry or heavy industry, or for applications in mining. Examples of industrial applications include, for example, applications in foundries, bulk material handling terminals, the cement industry, the metal industry, power generation, quarries, sand and gravel pits, and the construction industry. Use in applications in light industry, such as the consumer goods industry, including the food industry, is not preferred. 202400230

[0099] 17

[0100] The conveyor belt according to the invention is particularly suitable for transporting bulk materials. The conveyed material, or bulk material, is in particular a solid material which can be dry, moist, or wet. Use for transporting unit loads is not preferred.

[0101] Examples of suitable conveyed material or bulk material for use with the conveyor belt according to the invention are building materials, ores, coal, rock, overburden, sand, gravel, limestone, cement, salts, minerals, fertilizers, slag and excavated earth.

[0102] The conveyor belt is particularly suitable as a cut and gouge resistant, abrasion resistant and / or oil resistant conveyor belt.

[0103] The invention further relates to a conveyor belt system which has a conveyor belt according to the invention as described above.

[0104] Conveyor belt systems typically comprise, in addition to the conveyor belt, a supporting structure, at least one drive station (drive drum), at least one deflection station, and rollers such as carrying and guide rollers, a feed station, and a discharge station. Furthermore, a tensioning station is usually present.

[0105] The conveyor belt system according to the invention is preferably a trough belt conveyor. In this type of conveyor belt system, the conveyor belt operates in a trough shape. The trough shape is generally achieved by trough-shaped support rollers.

[0106] The trough belt conveyor preferably has a conveyor belt trough angle in the range of 10° to 45°.

[0107] The present invention is illustrated in more detail below by means of exemplary embodiments and figures, which, however, should not be construed in any way as limiting the scope of protection of the invention.

[0108] Examples

[0109] TPE conveyor belts were manufactured from an upper cover plate, a lower cover plate and a carcass arranged in between, with the cover plates designated 202400230.

[0110] Eighteen different commercially available thermoplastic elastomers were used.

[0111] The carcass of the TPE conveyor belts consists of a textile tensile member coated with TPE adhesive. Table 1 lists the thermoplastic elastomers used and their properties. Table 2 lists further properties of these thermoplastic elastomers.

[0112] Table 1

[0113] No. Type Tensile strength Tear strength Abrasion, Hardness Tmax, Tg, ÖB elongation, MPa, mm 3 Shore A °C °C

[0114] %

[0115] TPE-1 TPU ester 57 537 23 88 178 -43 p

[0116] TPE-2 TPU- 51 474 34 84 210 -41 M

[0117] Ether

[0118] TPE-3 TPU- 53 514 37 91 171 -37 M

[0119] Ether

[0120] TPE-4 TPU ester 50 530 40 88 181 -31 p

[0121] TPE-5 TPV 15 507 93 92 157 -41 M

[0122] Table 2

[0123] No. Type Friction Cleaning Coefficient Capability (COF)

[0124] TPE-1 TPU Ester 0.83 2.0

[0125] TPE-2 TPU-Ether 1.95 1.0

[0126] TPE-3 TPU-Ether 1.01 2.0

[0127] TPE-4 TPU Ester 0.65 3.0

[0128] TPE-5 TPV 0.33 4.5

[0129] Key for Tables 1 and 2: TPU ester: thermoplastic polyurethane based on polyester; TPU ether: thermoplastic polyurethane based on polyether; TPV: thermoplastic vulcanizate; 202400230

[0130] 19

[0131] Tmax: Melting temperature

[0132] Tg: Glass transition temperature

[0133] ÖB: Oil resistance (S = excellent (superior); M = medium (medium)).

[0134] Measurements of the coefficient of friction and cleanability were performed on unwashed TPE samples.

[0135] Figure 1 shows the dependence of the flexural modulus of the respective TPEs on temperature. Figure 2 shows the dependence of the rolling friction factor (RFF) of the respective TPEs on temperature.

[0136] The following measurement methods were used to determine the parameters of the TPE in Tables 1 and 2:

[0137] Tensile strength and elongation at break are determined according to ISO 37: Type 2 2011-12. Measurements according to DIN 53504 S2 :2009-10 yield similar results.

[0138] Abrasion is determined according to DIN ISO 4649 A:2021-06.

[0139] Shore A hardness is determined according to DIN ISO 48-4:2021-02.

[0140] The melting temperature Tmax is determined by differential thermal analysis (DSC Melting Point).

[0141] The glass transition temperature is determined by differential thermal analysis (DSC Tg).

[0142] Oil resistance is determined according to DIN ISO 1817:2016-11 , 28d x 23°C, IRM 903.

[0143] The flexural modulus of the TPEs at different temperatures was determined using the 3-point bending test according to ASTM D-790M:2017. The results are shown in Fig. 1. 202400230

[0144] 20

[0145] The measured coefficient of friction (COF) is the static coefficient of friction determined on unwashed TPE samples according to ASTM D 1894-14 (Coefficient of Friction Test), however with the following differences in sample size and weight.

[0146] COF test

[0147] Weight used (g) approx. 2268

[0148] Sled weight (g) approx. 100

[0149] COF block weight (g) (TPE sample) approx. 120

[0150] Total weight (g) approx. 2488

[0151] COF block dimensions

[0152] Width (mm) 95.25

[0153] Length (mm) 95.25

[0154] Thickness (mm) 12.75

[0155] Area (mm) 2 ) 9072,563

[0156] Pressure (N / m 2 ) approx. 2687,488

[0157] The cleanability of the TPEs is determined using an internal procedure. Two TPE samples (50 x 70 mm) are attached to the wall of a tumbling container (4 L volume) filled with powdered or moist clay. The container is then subjected to a tumbling process for 15 minutes. The removed sample is cleaned with a rubber scraper (for powdered clay) or a plastic scraper (for moist clay). The weight of the sample is determined before and after cleaning. The results are then evaluated on a scale from 0 (very poor cleanability) to 5 (excellent cleanability).

[0158] The rolling friction factor (RFF) is determined using the DMA test according to DIN 53513 and DIN EN ISO 6721 to identify TPEs with low rolling resistance (LRR). A Rheometrics Dynamic Mechanical Analyzer (DMA) is used to determine the RFF. 202400230

[0159] 21

[0160] Table 1 and Fig. 1 show a comparison of the mechanical and temperature properties of various tested TPE materials used for the top and bottom cover plates of conveyor belts. The higher the values ​​for tensile strength and elongation at break, and the lower the values ​​for abrasion of a cover plate, the better its mechanical properties (abrasion, pitting, and cut resistance) and the longer the service life of the cover plate and, consequently, the entire conveyor belt. The lower the cover plate hardness and flexural modulus, and the lower the glass transition temperature (Tg), the lower the flexural stiffness of the cover plate and, consequently, the better the belt's troughing ability, especially at low temperatures.Furthermore, the following applies: The lower the hardness of the cover plates and the higher the absolute value of the glass transition temperature Tg, the lower the risk of cold cracks and the lower the resistance to movement that drive systems of a conveyor system have to overcome due to elasticity losses of the belts at low temperatures.

[0161] The higher the melting temperature of TPE, the more it can withstand the high temperatures of the conveyed material as well as the high ambient temperatures common in the metal or cement industry.

[0162] Fig. 2 shows how the rolling friction coefficient (RFF) depends on the temperature. The RFF determines the value of the indentation rolling resistance (IRR) for a bottom cover plate, which constitutes a significant part of the total rolling resistance of a conveyor belt. For horizontal or slightly inclined conveyors with a center-to-center distance "C-C" of 1000 m or more (long-distance conveyors), the IRR contributes 60 to 70% of the total rolling resistance of a conveyor belt system.

[0163] Figure 2 shows that TPE-5 has the lowest RFF, followed by TPE-3, and consequently both are much better suited for selecting the bottom cover plate TPEs for long-distance conveyors (CC >1000m) than other TPEs. The RFF value for temperatures >0°C is crucial because the majority of long-distance conveyors are installed in so-called "warm" countries. 202400230

[0164] 22

[0165] Based on the mechanical and temperature properties of the TPEs as explained above, and also the results of the COF and cleanability tests shown in Table 2, it is clear that a selection of different TPE materials or their combination for the top and bottom cover plate of a conveyor belt can be very advantageous depending on the task and application requirements.

[0166] The following are specific examples of suitable combinations for certain use cases, taking into account the following aspects in particular.

[0167] For example, a conveyor belt can be constructed with a cover plate made of TPE-4 or TPE-5 to achieve better cleanability of the cover plate, which is in direct contact with dirty and sticky material. At the same time, TPE 2 is a better choice for the lower cover layer to ensure effective transmission of torque from a drive drum of a conveyor system to the conveyor belt. Such an embodiment is shown in Example 2.

[0168] Another example is a TPE belt for a long-distance overland conveyor in the mining industry, where abrasive (sand, iron pellets) or coarse and mechanically demanding bulk materials (ores, overburden, etc.) are to be transported over long distances with a center-to-center distance of CC > 1000 m. In this case, the best choice for the top cover layer is TPE-1, TPE-2, or a combination thereof, offering excellent mechanical properties and low flexural stiffness. Such an embodiment is shown in Example 1.

[0169] However, TPE-5 or TPE-3 with a low RFF (see Fig. 2) are better suited for the lower cover plate, as they help to reduce the indentation rolling resistance of the lower cover and consequently enable the operation of a conveyor system with lower energy consumption, resulting in lower drive power required for installation and reduced investment and operating costs. Such an embodiment is shown in Example 3. 202400230

[0170] 23

[0171] For steeply inclined conveyors or hot bulk materials, a high coefficient of friction (COF) and / or a high melting point are required to prevent material slippage and / or heat damage to the cover plate. In this case, TPE 2 is better suited for the cover than other TPEs due to its significantly higher COF and melting point. For short conveying distances, a TPE belt made of TPE 2 as the upper cover plate and TPE 5, or TPE 5 in combination with TPE 2 with a low flexural modulus, as the lower cover plate may be suitable to handle a steep incline or high bulk material temperature while keeping the lower cover plate clean or reducing drive power requirements. Such an embodiment is shown in Example 4.

[0172] Example 1

[0173] The TPE conveyor belt according to Example 1 is shown schematically in Fig. 3. The lower cover plate 1 is a single layer made of the thermoplastic elastomer TPE-2. The carcass 2 is a woven tensile member made of a textile layer coated with TPE adhesive. In this example, a single textile layer is used as the tensile member, but the carcass can also consist of several textile layers. The upper cover plate 3 is a two-layer construction consisting of an inner layer 3-1 and an outer layer 3-2, with the inner layer 3-1 comprising approximately 2 / 3 of the total thickness of the upper cover plate and the outer layer 3-2 comprising approximately 1 / 3 of the total thickness of the upper cover plate. The inner layer 3-1 of the upper cover plate is made of TPE-2, and the outer layer 3-2 of the upper cover plate is made of TPE-1.

[0174] As shown in Table 1, for example, the mechanical properties of TPE-1 surpass those of the other listed TPEs, but TPE-2 has lower hardness at approximately the same glass transition temperature Tg and consequently better flexibility (lower bending stiffness). The bottom cover layer made of TPU-2 and the top cover layer made of a combination of TPE-1 for the outer layer 3-2 and TPE-2 for the inner layer 3-1 can therefore have a very beneficial effect on the properties of the conveyor belt as a whole, resulting in high mechanical properties and better troughing ability than a conveyor belt with top and bottom covers made only of TPE-1. 202400230

[0175] 24

[0176] Such a belt construction, or a selection of TPEs with similar parameters for the cover plates, can be used, for example, for conveying highly oily bulk materials at very low ambient temperatures (e.g., oil sands in Canada during winter). TPE-1 exhibits very good oil resistance, and TPE-2 has medium oil resistance. The combination results in high oil resistance with an excellent (low) abrasion value due to the outer layer 3-2 made of TPE-1, and simultaneously sufficient troughing capacity at low winter temperatures thanks to the layers made of TPE-2 (inner layer 3-2 of the upper cover plate and the lower cover plate).

[0177] Furthermore, TPE-2 is an excellent choice for applications with high and / or low material or ambient temperatures. In any case, the two-layer top sheet made from the combination of TPE-1 and TPE-2 not only provides very good mechanical properties and oil resistance, but also improved cradling ability at low temperatures.

[0178] Example 2

[0179] The TPE conveyor belt according to Example 2 is shown schematically in Fig. 4. The lower cover plate 1 is a single layer made of the thermoplastic elastomer TPE-2. The carcass 2 is a textile tensile member made of textile layer(s) coated with TPE adhesive. The upper cover plate 3 is a single layer made of TPE-4 or TPE-5.

[0180] The TPE conveyor belt according to Example 2 is particularly suitable for transporting dirty and sticky materials, such as those found in the process industry, with efficient torque transmission from a drive drum to the belt. For very dirty and sticky bulk materials, a top cover plate made of TPE-4 or TPE-5 is advantageous because these materials can be cleaned very easily.

[0181] Example 3

[0182] The TPE conveyor belt according to Example 3 is shown schematically in Fig. 5. The lower cover plate 1 is single-layered and made of the thermoplastic elastomer TPE-5 202400230.

[0183] 25. Carcass 2 is a textile tensile carrier made of textile layer(s) coated with TPE adhesive. The upper cover plate 3 is single-layered and made of TPE-1.

[0184] The TPE conveyor belt according to example 3 is particularly suitable for a long-distance conveyor (CC>1000 m) for transporting abrasive or coarse and mechanically stressful bulk materials in mining with minimal drive power.

[0185] Example 4

[0186] The TPE conveyor belt according to Example 4 is designed in two alternatives, which are shown schematically in Figures 6 and 7. In the first alternative, the lower cover plate 1 is a single layer made of the thermoplastic elastomer TPE-5 (Figure 6). In the second alternative, the lower cover plate 2 is a double layer consisting of an inner layer 1-2 and an outer layer 1-1, with the inner layer 1-2 being made of TPE-2 and the outer layer 1-1 being made of TPE-5 (Figure 7). The carcass 2 is a textile tensile member made of textile layer(s) coated with TPE adhesive. The upper cover plate 3 is a single layer made of TPE-2.

[0187] The conveyor belt design according to Example 4 with TPE-2 as the upper cover plate and TPE-5 or a two-layer combination of TPE-2+TPE-5 as the lower cover plate is suitable for coping with a high inclination angle of a conveyor system or a high bulk material temperature, while simultaneously offering high cleanability of the lower cover layer and reduced drive power requirements of a conveyor system due to low RFF and flexural stiffness values.

[0188] 202400230

[0189] 26

[0190] Reference symbol list

[0191] 1 lower cover plate

[0192] 1-1 outer layer of the lower cover plate 1-2 inner layer of the lower cover plate

[0193] 2 Carcass, in particular a textile tensile carrier (consisting of one or more textile layers)

[0194] 3 top cover plate

[0195] 3-1 inner layer of the top cover plate 3-2 outer layer of the top cover plate

Claims

202400230 27 Patent claims 1. Conveyor belt comprising a single or multi-layer top cover plate for the load-bearing side, a single or multi-layer bottom cover plate for the running side, and a carcass with one or more tension members between the top cover plate and the bottom cover plate, wherein the top cover plate is formed from one or more thermoplastic elastomers (TPE) and has a thickness in the range of 1.0 mm to 50 mm, and the bottom cover plate is formed from one or more thermoplastic elastomers (TPE) and has a thickness in the range of 1.0 mm to 30 mm, and wherein at least one thermoplastic elastomer is included only in the top cover plate or only in the bottom cover plate.

2. Conveyor belt according to claim 1, wherein the upper cover plate has a thickness in the range of 2.0 to 30 mm and the lower cover plate has a thickness in the range of 1.0 mm to 30 mm, preferably a thickness in the range of 1.5 to 10 mm, and / or wherein the thickness of the lower cover plate is 25 to 70%, preferably 30 to 55% of the thickness of the upper cover plate.

3. The total thickness of the conveyor belt according to the invention can be, for example, in the range of 2 to 100 mm, preferably from 3 to 60 mm.

4. Conveyor belt according to one of the preceding claims, wherein the one or more thermoplastic elastomers of the upper cover plate are selected from one or more thermoplastic polyurethanes (TPU), one or more thermoplastic vulcanizates (TPV), one or more thermoplastic polyolefins (TPO), one or more PVC-NBR blends, one or more flexible PVCs or a combination thereof, and the one or more thermoplastic elastomers of the lower cover plate are selected from one or more thermoplastic polyurethanes (TPU), one or more thermoplastic vulcanizates (TPV), one or more thermoplastic polyolefins (TPO), one or more PVC-NBR blends, one or more flexible PVCs or a combination thereof. 202400230 28 5. Conveyor belt according to one of the preceding claims, wherein the one or more tensile members of the carcass are one or more textile layers, preferably comprising polyolefin yarn.

6. Conveyor belt according to one of the preceding claims, wherein the conveyor belt is designed for an axle spacing of more than 10 m, preferably between 50 m and 1000 m, and / or wherein the conveyor belt is designed for an axle spacing of at least 100 m.

7. Conveyor belt according to one of the preceding claims, wherein the conveyor belt is designed for operation in the flat form and / or in the trough form.

8. Conveyor belt according to one of the preceding claims, wherein the single- or multi-layer upper cover plate is single-layer or double-layer and the single- or multi-layer lower cover plate is single-layer or double-layer.

9. Conveyor belt according to one of the preceding claims, wherein the upper cover plate i) is formed in a single layer and is made of a TPE, preferably a TPU, wherein the TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 450% and an abrasion of at most 50 mm 3 exhibiting, wherein the TPE preferably has a tensile strength of at least 50 MPa, an elongation at break of at least 500%, and an abrasion of no more than 40 mm 3 , has a Shore A hardness of at most 90 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C up to Tg of -70°C, or ii) is formed in two layers with an inner layer and an outer layer, wherein iia) the inner layer is formed from a TPE, preferably a TPU, wherein the TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 450% and an abrasion resistance of at most 50 mm 3exhibiting, wherein the TPE preferably has a tensile strength of at least 50 MPa, an elongation at break of at least 500%, and an abrasion of no more than 40 mm 3 , has a Shore A hardness of at most 86 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C, and üb) the outer layer is formed from a TPE, preferably a TPU, wherein the TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 202400230 29 500% and a maximum abrasion of 40 mm 3 exhibiting, wherein the TPE preferably has a tensile strength of at least 50 MPa, an elongation at break of at least 500%, and an abrasion of no more than 30 mm 3, has a Shore A hardness of at most 90 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C, and wherein the TPE of the outer layer has a higher tensile strength and a higher elongation at break than the TPE of the inner layer, or iii) is formed in a single layer and is made of a thermoplastic vulcanizate (TPV).

10. Conveyor belt according to one of the preceding claims, wherein the lower cover plate i) is formed in a single layer and is made of a TPE, preferably a TPU, wherein the TPE has a static coefficient of friction of at least 1.00, preferably at least 1.50, and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C, or ii) is formed in a single layer or in two layers with an inner layer and an outer layer, wherein in the single-layer embodiment the single layer and in the two-layer embodiment the outer layer is made of a thermoplastic vulcanizate (TPV).

11. Conveyor belt according to one of the preceding claims, wherein the conveyor belt, which is preferably a textile conveyor belt, has one of the following configurations a) to c): a) the upper cover plate is formed in two layers with an inner layer and an outer layer and the lower cover plate is formed in a single layer, wherein the lower cover plate and the inner layer of the upper cover plate are each formed from a first TPE, preferably TPU, and the outer layer of the upper cover plate is formed from a second TPE, preferably TPU, which is different from the first TPE, wherein the first TPE has a static coefficient of friction of at least 1.00, preferably at least 1.50, and wherein the TPE preferably has a static coefficient of friction of at least 1.00, preferably at least 1.50, and a 202400230 30 Glass transition temperature Tg of not less than -20°C, preferably not less than -40°C up to Tg of -70°C, wherein the second TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 500% and an abrasion resistance of at most 40 mm 3a) the upper cover plate and the lower cover plate are formed in a single layer, wherein the lower cover plate is formed from a first TPE, preferably TPU, and the upper cover plate is formed from a second TPE, which is different from the first TPE, wherein the first TPE has a static coefficient of friction of at least 1.00, preferably at least 1.50, and a glass transition temperature Tg of at least -20°C, preferably at least -40°C, up to -70°C, and the second TPE is a thermoplastic vulcanizate (TPV).c) The upper cover plate is formed in a single layer, and the lower cover plate is formed in a single layer or in two layers with an inner layer and an outer layer, wherein, if the lower cover plate is formed in a single layer, the lower cover plate, and, if the lower cover plate is formed in two layers, the outer layer, is formed from a first TPE, and the upper cover plate is formed from a second TPE, preferably TPU, which is different from the first TPE, wherein the first TPE is a thermoplastic vulcanizate (TPV) and the second TPE has a tensile strength of at least 50 MPa, an elongation at break of at least 450%, and an abrasion resistance of at most 50 mm. 3 the second TPE preferably has a Shore A hardness of at most 90 and a glass transition temperature Tg of not less than -20°C, preferably not less than -40°C to Tg of -70°C. 202400230 31 12. Use of a conveyor belt according to any one of claims 1 to 11 for industrial or mining applications, in particular for heavy-duty applications, and / or for a troughed belt conveyor.

13. Use according to claim 12 as a cut- and puncture-resistant, abrasion-resistant and / or oil-resistant conveyor belt.

14. Conveyor belt system, in particular trough belt conveyor, comprising a conveyor belt according to one of claims 1 to 11.

15. Conveyor belt system according to claim 14, which is a trough belt conveyor with a conveyor belt trough angle in the range of 10° to 45°.

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