Shear band with oblong cords for non-pneumatic tires

Abstract

To provide, generally, vehicle tires and, more specifically, a shear band for non-pneumatic tires with a high compressive stiffness to reduce rolling resistance.SOLUTION: A non-pneumatic tire 100 includes: a central rim 106 coupling the tire to a vehicle; a connecting web 104 including a plurality of spokes coupled to the central rim and extending radially outward from the central rim; and a shear band 102 circumscribing the connecting web and coupled to the connecting web. The shear band includes a plurality of oblong cords 110 arranged in parallel layers, each of the oblong cords having a cross section defining a greater lateral width than a radial height.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure generally relates to vehicle tires, and more specifically to shear bands for non-pneumatic tires having high compressive stiffness to reduce rolling resistance.

Background Art

[0002] Pneumatic tires have been selected as a solution for vehicle movement for over a century. Pneumatic tires are efficient in supporting loads because the entire structure of the tire participates in supporting the load. Pneumatic tires are also desirable in that the contact pressure is low, so the vehicle load is dispersed and wear on the road is reduced. Pneumatic tires have low rigidity, so a comfortable ride inside the vehicle is also ensured. The main drawback of pneumatic tires is that they require compressed fluid. Conventional pneumatic tires become unusable when the air pressure is completely lost.

[0003] Tires designed to function without air pressure may be able to eliminate many of the problems and compromises associated with pneumatic tires. There is no need to maintain or monitor pressure. Non-pneumatic tires are typically defined by their load-bearing efficiency. A "bottom loader" is essentially a rigid structure that supports most of the load at the structural part under the hub. A "top loader" is designed such that the entire structure participates in supporting the load. Therefore, a top loader has higher load-bearing efficiency than a bottom loader and allows for a design with less mass.

[0004] The purpose of the shear band of a non-pneumatic tire is to transmit the load due to contact with the ground through the tension of the spokes or connecting webs to the central rim and form a top-loading structure. When the shear band deforms, shear deformation is more desirable than bending. Non-pneumatic tires typically have a shear band made of a rubber material disposed between at least two layers of inextensible belts or membranes. Using rubber for the shear band can significantly increase the cost, weight, and rolling resistance of non-pneumatic tires.

SUMMARY OF THE INVENTION

[0005] The present disclosure relates to a non-pneumatic tire having a shear band configured to increase the volume of a reinforcing material with little or no hysteresis. The volume of the reinforcing material in the shear band can be increased by using an oblong cord having a lateral width greater than the radial height. In some embodiments, the oblong cord may have a rectangular cross-section and may be densely filled in parallel layers. By selecting a compound having sufficient rigidity, the thickness of the compound between the oblong cords can be reduced. The oblong cord may be supplied as a monofilament composed of a single material, or as a multifilament cord containing a plurality of elongated glass, aromatic polyamide (aramid), and / or carbon fiber filaments incorporated in a resin matrix.

[0006] In a first aspect, the present disclosure provides a non-pneumatic tire. The non-pneumatic tire has a central rim for receiving a vehicle wheel or for coupling the tire to a vehicle, a connecting web coupled to the central rim and including a plurality of spokes extending radially outward from the central rim, and a shear band surrounding the connecting web and coupled to the connecting web. The shear band has a plurality of oblong cords arranged in parallel layers, and each of the oblong cords has a cross-section with a lateral width greater than the radial height. (Definitions)

[0007] The following definitions apply to the present invention.

[0008] "Axial" and "axially" mean a line or direction parallel to the axis of rotation of the tire.

[0009] "Circumferential" and "circumferentially" mean a line or direction extending along the circumference of the surface of the annular tread perpendicular to the axial direction.

[0010] "Code" means any of the following: (1) a long, narrow strip of material formed by twisting or otherwise combining a plurality of filaments; (2) a single filament (monofilament), with or without a coating; or (3) a narrow strip of material, with or without twisting and / or coating.

[0011] "Equatorial plane (EP)" means a plane perpendicular to the axis of rotation of the tire and passing through the center of the tread.

[0012] "Inelastic" means that the tensile stiffness of a particular layer or reinforcement exceeds approximately 25 Ksi.

[0013] "Lateral" means the axial direction.

[0014] "Monofilament" means a cord having only one filament.

[0015] "Oblong" means a cross-sectional shape that is wider than it is tall, or an elongated member having such a cross-section.

[0016] "Oval" means a cross-sectional shape of two opposing semi-circles connected at both ends by parallel lines.

[0017] "Radial" and "radially" mean in a direction toward or away from the axis of rotation of the tire, radially.

[0018] The present invention will be described, by way of example, with reference to the accompanying drawings.

Brief Description of the Drawings

[0019]

Figure 1

[0020]

Figure 2

[0021]

Figure 3A

[0022]

Figure 3B

Figure 3C

Figure 3D

Figure 3E

Figure 3F

Figure 3G

[0023]

Figure 4

[0024]

Figure 5

[0025]

Figure 6

[0026]

Figure 7

Best Mode for Carrying Out the Invention

[0027] Referring to FIG. 1, FIG. 1 shows a non-pneumatic tire 100 according to an aspect of the present disclosure. The non-pneumatic tire 100 generally includes a shear band 102, a connecting web 104, and a central rim 106. The shear band 102 and the connecting web 104 are designed as a top-loading structure to efficiently support the operating load. As will be described in more detail below, the shear band 102 is composed of a plurality of oblong cords 110 that reinforce the shear band 102 and reduce the rolling resistance of the non-pneumatic tire 100.

[0028] The central rim 106 can be composed of any suitable design and material for receiving the vehicle's wheel or for coupling the non-pneumatic tire 100 to the vehicle. For example, the central rim 106 can generally be composed of a cylindrical component formed from rubber, plastic, or carbon fiber. The cylindrical rim 106 may define the central axis of rotation (not shown) of the non-pneumatic tire 100. The connecting web 104 may be disposed radially outside the central rim 106 and may include a plurality of spokes 112 that extend radially outward from the central rim to the shear band 102. As shown in the figure, the connecting web 104 includes two sets of spokes 112 arranged circumferentially at the lateral ends of the non-pneumatic tire 100. The spokes 112 may be curved or straight, and may have a cross-sectional design different from the generally rectangular spokes 112 shown in the figure. In some embodiments, the connecting web 104 may include an axially extending connecting ring 114 between the spokes 112. The connecting ring 114 may be provided to reinforce the non-pneumatic tire 100 radially and may be composed of a fabric lattice or other structure. In other embodiments, the connecting ring 114 may be omitted. The connecting web 104 (including the spokes 112) may be formed of an elastic material such as rubber or a thermoplastic elastomer.

[0029] The shear band 102 is an annular structure located radially outside the connecting web 104 and radially inside the tread portion 118 of the non-pneumatic tire 100. The tread portion 118 may or may not include grooves or other patterns for contacting the road surface. The tread portion 118 may include components such as ribs, blocks, lugs, sipes, etc. to improve the grip or other performance characteristics of the non-pneumatic tire 100. A layer or tread rubber 120 may be adhered to the radially outer surface of the shear band 102.

[0030] Referring to FIG. 2, FIG. 2 shows a cross-sectional view of the shear band 102. The shear band 10 is typically composed of an oblong cord 110 disposed between one or more radially inner belt layers 204 and one or more radially outer belt layers 206. The belt layers 204 and 206 can be composed of elongated steel wire cords 208 incorporated in an elastomeric coating. The elongated steel wire cords 208 of the radially inner belt layer 204 are arranged at a first angle in the range of about 0 degrees to about ±10 degrees, about 0 degrees to about ±25 degrees with respect to the equatorial plane EP of the non-pneumatic tire 100 (FIG. 1). Similarly, the elongated steel wire cords 208 of the outer belt layer 206 are arranged at a second angle in the range of about 0 degrees to about ±10 degrees, about 0 degrees to about ±25 degrees and / or about -20 degrees to about 30 degrees with respect to the equatorial plane EP. In some embodiments, the first angle and the second angle extend in opposite directions, and in other embodiments, the first angle and the second angle extend in the same direction. Although the first and second belt layers 204 and 206 are described as being composed of elongated steel wire cords 208, in other embodiments, other types of non-stretch reinforcing cords may be used instead of the elongated steel wire cords 208 without departing from the scope of the present disclosure.

[0031] The oblong code 110 is disposed in a plurality of parallel layers 212. The parallel layers 212 enable the oblong code 110 to be densely packed, and a relatively large amount of reinforcing material is supplied to the shear band 102. As shown in FIG. 2, the oblong codes 110 of each parallel layer 212 are arranged in a staggered pattern in the lateral direction with respect to the oblong codes 110 of the adjacent layer 212. This arrangement results in a relatively rigid shear band 102. In other embodiments, the oblong code 110 may be disposed not only in the parallel layers 212 but also in parallel radial columns (not shown). An elastomer compound 214 may be disposed between the oblong codes 110. The elastomer compound 214 may be formed from a mixture of various components selected to impart desired stiffness or other properties to the shear band 102. In some embodiments, the compound 214 has a shear modulus or stiffness G'1%RPA in the range of about 1.0 MPa to about 42 MPa. In some embodiments, the stiffness G'1%RPA is in the range of about 0.5 MPa to about 15 MPa, more preferably in the range of about 3 MPa to about 7 MPa.

[0032] Referring to FIG. 3A, FIG. 3A shows one exemplary embodiment of an oblong cord 110 having a generally rectangular cross-section. The oblong cord 110 has a lateral width “W” that is greater than the radial height “H”. In some embodiments, the width “W” ranges from about 0.7 mm to about 38 mm (about 0.03 inches to about 1.5 inches), and the height “H” ranges from about 0.1 mm to about 18 mm (about 0.004 inches to about 0.7 inches). The lateral and radial directions are described with reference to the orientation of the oblong cord 110, as shown in FIG. 2, i.e., the width “W” is parallel to the lateral direction and the height “H” is parallel to the radial direction. The greater the ratio of “W” to “H”, the greater the lateral bending stiffness of the oblong cord 110 and the shear band 102 formed by the oblong cord 110. In other embodiments, the oblong cord 110 may be arranged in other orientations, such as being inclined and / or orthogonal to the illustrated direction. The oblong cord 110 shown in FIG. 3A includes a lower wall 302, an upper wall 304, and generally flat side walls 306, 308. The intersections of the walls 302, 304, 306, 308 are rounded corners 310, and the oblong cord 110 generally does not have sharp corners. Each of the rounded corners 310 has a radius “R”, and the radius “R” may be less than one-half of the radial height “H”.

[0033] As shown in FIG. 3A, the oblong cord 110 is a multifilament cord composed of a plurality of elongated filaments 314 incorporated into a resin matrix 316. The elongated filaments 314 are composed of glass, aromatic polyamide, and / or carbon fiber, and may occupy 50% or more of the volume of the oblong cord 110. The resin matrix 316 includes at least one of epoxy, nylon, polyurethane, polyester, vinyl ester, phenolic resin, and resorcinol / formaldehyde / latex (RFL) resin, and usually binds the elongated filaments 314 to each other. The resin matrix 316 includes a crosslinkable resin or a curable resin, and may be crosslinked or cured by exposure to ultraviolet light or heat, or by other methods recognized in the art. Examples of the resin include, for example, epoxy vinyl ester type, epoxy bisphenol type, epoxy bisphenol A type, and / or a mixture of epoxy vinyl ester type resin and epoxy bisphenol type resin. In some exemplary embodiments, the oblong cord 110 is composed of a nylon resin matrix 316 reinforced with glass or carbon filaments 314. In other embodiments, the oblong cord 110 may be configured as a monofilament of a single material. For example, the oblong cord may have the same cross-section as shown in FIG. 3A, but may be composed of a single material such as nylon, polyester, aromatic polyamide, or carbon fiber.

[0034] Referring to FIGS. 3B through 3E, FIGS. 3B through 3E show cross-sections of other embodiments of oblong cords 320, 322, 324, and 326 where the lateral width "W" is greater than the radial height "H". The oblong cord 320 shown in FIG. 3B has an elliptical cross-section and includes two semi-circular side surfaces 332 and 334 connected by flat and parallel lower and upper side surfaces 336 and 338. The semi-circular side surfaces 332 and 334 are defined by rounded corners 340 where the radius "R" is equal to one-half of the radial height "H". In some embodiments, the ratio of the width "W" to the height "H" of the oblong cord 320 is in the range of 2 to 5. The oblong cord 322 (FIG. 3C) has a standard rectangular cross-section with sharp corners 342, for example, the radius "R" of the corner is zero. The oblong cord 324 (FIG. 3D) may have concave side surfaces 344 and 346. The concave side surface 344 extending in the radial height "H" has a relatively small minor radius R minor and the concave side 346 extending in the lateral width "W" has a relatively large major radius R major The centers of the radius R minor and the radius R major are located outside the cross-section. To define the recess of the oblong cord 324, the minor radius R minor and the major radius R major can be considered "negative". The oblong cord 326 may have an irregular cross-section such as the illustrated inverted V-shaped cross-section. The inverted V-shaped cross-section includes two arms 348 and 350 extending in opposite directions from the apex 352. Due to the inverted V-shaped cross-section, when arranged in parallel layers, the oblong cords 326 overlap each other.

[0035] Referring to FIGS. 3F and 3G, FIGS. 3F and 3G show additional exemplary oblong codes 354 and 356 where the lateral width "W" is greater than the radial height "H". The oblong code 354 (FIG. 3F) has an outer side portion 354 that generally has an elliptical cross-section. The outer side portion 358 centered at the origin (0,0) of the Cartesian coordinate plane can be represented by Equation 1 below. Here, "a" represents the length of the major axis 360 of the ellipse, and "b" represents the length of the minor axis 362 of the ellipse.

Number

[0036] The foci 364 of the ellipse are located at a distance "c" from the origin (0,0), and the distance "c" can be calculated using Equation 2 below.

Number

[0037] The eccentricity "e" of the ellipse generally represents how flat or round the shape of the ellipse is. Usually, the closer the ellipse is to being circular, the closer "e" is to zero (0), and the flatter the ellipse is, the closer "e" is to (1). The eccentricity "e" of the ellipse can be calculated using Equation 3 below.

Number

[0038] In some embodiments, the eccentricity "e" of the outer side portion 354 may be in the range of about 0.6 to about 0.9. If the eccentricity is low, the oblong code 354 cannot be densely filled in the shear band, and if the eccentricity is high, the flexibility of the individual codes 354 becomes too high.

[0039] The oblong code 356 (FIG. 3G) has an outer edge portion 374 with an irregular elliptical (e.g., oval) cross-section. The outer edge portion 374 is centered at the origin (0,0) of the Cartesian coordinate plane and can be represented by the following Equation 4. Here too, "a" represents the length of the major axis 376 of the ellipse, "b" represents the length of the minor axis 378 of the ellipse, and "t" is a constant much smaller than "a".

Equation

[0040] The foci 380 of the irregular ellipse (e.g., oval) are located at a distance "c" from the origin (0,0), and the distance "c" can be calculated using Equation 2 above. Similarly, the eccentricity "e" of the irregular ellipse can be calculated using Equation 3 above. In some embodiments, the eccentricity "e" of the outer edge portion 374 is also in the range of about 0.6 to about 0.9.

[0041] It should be noted that for each oblong code 110 (FIG. 3A), 320 (FIG. 3B), 322 (FIG. 3C), 324 (FIG. 3D), 326 (FIG. 3E), 354 (FIG. 3F), and 356 (FIG. 3G), variations from these ideal shapes are envisioned, for example, due to manufacturing errors or variations, without departing from the scope of the present disclosure. Further, each oblong code 110, 320, 322, 324, 326, 354, 356 (and other codes described herein) has a surface finish ranging from smooth to rough, thereby promoting adhesion between the codes or with the compound 214 (FIG. 2). It is also envisioned that the surface finish may cause the code to vary from the ideal or mathematical shape described above. Similar to the oblong code 110 described above, the oblong codes 320, 322, 324, 326, 354, 356 (and other codes described herein) may be configured as a monofilament of a single material (e.g., nylon, polyester, glass, aromatic polyamide, carbon fiber), incorporated into a resin matrix, or as a multifilament code comprising a plurality of elongated filaments (e.g., glass, aromatic polyamide, or carbon fiber) that are twisted or adhered together.

[0042] Referring to FIG. 4, FIG. 4 shows an alternative embodiment of the shear band 402 that includes one or more inner belt layers 404 made of a material different from the aromatic polyamide cord 406 or the outer belt layer 206. The aromatic polyamide cord 406 provides heat resistance and chemical resistance to the shear band 402 and may also provide other performance characteristics. For example, an aromatic polyamide such as aramid can form a cord 406 having a high tensile stiffness. Placing the aromatic polyamide cord 406 at the bottom of the shear band 402 (near the innermost radial end) maximizes the advantage of high tensile stiffness because the innermost radial end of the shear band 402 is subjected to tensile forces during operation. These cords 406 reinforce the shear band 402 and are resistant to these tensile forces. In some embodiments, the cord 406 may be made of a nylon resin. Nylon is an aliphatic polyamide and may shrink, for example, when heated by stresses during operation. The shrinkage ability of the cord 406 provides resistance to elongation of the shear band 402 and the tire formed by the shear band 402.

[0043] The outer belt layer 206 can be composed of elongated steel wire cords 208 incorporated into an elastomeric coating as described above. The aromatic polyamide cord 406 has a larger diameter than the steel wire cord 208 and can be made adhesive to maintain the aromatic polyamide cord 406 in a predetermined position when the shear band 402 is formed. The aromatic polyamide cord 406 (or any of the other cords described herein) can be made adhesive by various methods recognized in the art, such as coating the cord 406 with an aqueous blend of rosin and rubber latex or coating it with a solvent solution or emulsion of an unvulcanized rubber compound. In some embodiments, the aromatic polyamide cord 406 may be inclined in the range of about -25 degrees to about 25 degrees, -10 degrees to about 10 degrees, and / or -20 degrees to about 30 degrees with respect to the equatorial plane EP (FIG. 2) of the tire.

[0044] Between the inner belt layer 404 and the outer belt layer 206, as described above, the shear band 402 includes one or more parallel layers 212 of the oblong cords 110. In other embodiments, the oblong cord 110 can be replaced with any of the oblong cords 320 (FIG. 3B), 322 (FIG. 3C), 324 (FIG. 3D), 326 (FIG. 3E), 354 (FIG. 3F), or 356 (FIG. 3G) described above, and within the scope not departing from the gist of the present disclosure, the oblong cords 110, 320, 322, 324, 326, 354, 356 can also be combined with each other.

[0045] Referring to FIG. 5, FIG. 5 shows an alternative embodiment of the shear band 502 that includes a set of end belts 504 that cover the lateral edges 506a, 506b of the outer belt layer 206. In some embodiments, the end belt 504 includes a wire cord 508 or other filament that extends at an angle in the range of about 0 degrees to about ±10 degrees with respect to the equatorial plane EP (FIG. 2), and in some embodiments includes a wire cord or other filament that extends at an angle in the range of about 0 degrees to ±5 degrees. The end belt 504 restricts the movement of the outer belt layer 206 at the lateral edges 506a, 506b, thereby reducing the stress and heat generated during the use of the shear band 502 and reducing the reduction in strength. By reducing the stress, the risk that the edges of the outer belt 206 separate from the adjacent layers is reduced. As described above, the shear band 502 may further include one or more parallel layers 212 of the oblong cords 110 and one or more inner belt layers 404.

[0046] Referring to FIG. 6, FIG. 6 shows a schematic diagram of an example of a manufacturing apparatus 600 for forming oblong codes 110, 320, 322, 324, 326, 354, and 356. The manufacturing apparatus 600 includes a press roller 602 and a forming roller 604. The forming roller 604 includes a circumferential depression 606 having a width and a depth of a size and shape similar to the lateral width “W” and the radial height “H” of a desired oblong code. As shown in FIG. 6, the circumferential depression 606 is generally rectangular and can be used to form the oblong code 110. In other embodiments, the circumferential depression 606 may be sized or shaped to form any of the other oblong codes 320, 322, 324, 326, 354, 356, or any of the other multifilament codes described herein. One or both of the press roller 602 and the forming roller 604 may incorporate a heater, such as a resistance heater (not shown), and in other embodiments, individual heaters (not shown) may be provided adjacent to the rollers 602, 604.

[0047] The press roller 602 and the forming roller 604 are interlocked and rotate in opposite directions, for example, in the directions of arrows 608 and 610, and can feed a plurality of resin-coated filament bundles 612 through the circumferential depression 606. The filament bundle 612 includes one or more filaments 314 (FIG. 3), which include glass filaments, aromatic polyamide filaments, and / or carbon fiber filaments as described above. By heating the resin-coated bundle 612 and applying pressure with the rollers 602, 604, the oblong code 110 can be formed.

[0048] In other embodiments, the multifilament oblong cords 110, 320, 322, 324, 326, 354, and 356 may be formed using pultrusion techniques and apparatus. Pultrusion is a processing technique that pulls a mixture of reinforcing fibers (such as glass fibers, aramid fibers, carbon fibers, etc.) and a liquid resin through a heated die (not shown) to form and manufacture continuous fiber-reinforced polymers (FRPs). This process produces cords with a constant cross-section, such as pipes, rods, beams, and / or any of the shapes shown in FIGS. 3A - 3F. By changing the shape of the heated die and the type of resin matrix, oblong cords 110, 320, 322, 324, 326, 354, and 356 with desired performance characteristics can be manufactured.

[0049] Referring now to FIG. 7, FIG. 7 shows an exemplary procedure 700 for manufacturing a tire assembly according to aspects of the present disclosure. Procedure 700 begins with step 702 of coating a glass filament bundle with resin. Next, the bundles are pressed together (step 704) and formed into an oblong cord. The bundles may be pressed together, for example, using forming rollers or a die of a pultrusion manufacturing facility. Next, in step 706, a surface finish is applied and the oblong cord is heat treated. Note that steps 702, 704, and 706 can be performed in sequence, simultaneously, or in an order different from the order shown.

[0050] Subsequently, procedure 700 proceeds to step 708 where the completed oblong code is wound onto a spool for storage or transportation. In some embodiments, step 708 is omitted and procedure 700 proceeds directly to step 710 where the oblong code may be attached to the shear band of the non-pneumatic tire assembly. The oblong code can be attached to parallel circumferential layers, and the oblong code of each layer may be arranged in a staggered pattern in the lateral direction with respect to the oblong code of an adjacent layer. A compound may be disposed between the oblong codes within the shear band. The tire assembly can be completed by attaching an upper belt and / or a lower belt to the shear band, attaching the tread, and / or attaching the shear band to the central rim and connecting web.

[0051] Unless otherwise indicated, all numerical values representing amounts, properties such as molecular weight, reaction conditions, etc. of the components used in this specification and the related claims are to be understood as being modified in all instances by the term "about". Accordingly, unless otherwise indicated, the numerical parameters set forth in this specification and the appended claims are approximate values that may vary depending upon the desired properties sought to be obtained by the practice of the present invention. At the very least, and not as an attempt to limit the application of the doctrine of equivalents to the scope of the claims, each numerical parameter should be construed in light of the reported significant digits and by applying ordinary rounding techniques.

[0052] In this specification, the compositions and methods are described as having various components or steps, but the compositions and methods can also consist essentially of or consist of various components and steps.

[0053] In light of the description herein, variations are possible in the present invention. For the purpose of explaining the present invention, specific representative embodiments and details are shown, but it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the scope of the present invention. Therefore, it is understood that changes can be made to the specific embodiments described within the fully intended scope of the present invention as defined by the following appended claims.

Claims

1. A central rim for attaching a tire to a wheel, A connecting web coupled to the central rim and including a plurality of spokes extending radially outward from the central rim, A shear band surrounding the connecting web and coupled to the connecting web, The shear band has a plurality of oblong cords arranged in parallel layers, and each of the oblong cords has a cross-section with a lateral width larger than a radial height, and it is a non-pneumatic tire.

2. The non-pneumatic tire according to claim 1, wherein each of the oblong cords is a multifilament cord having a plurality of elongated glass fibers, carbon fibers, and / or aromatic polyamide fibers incorporated in a resin matrix.

3. The non-pneumatic tire according to claim 2, wherein the resin matrix has at least one of epoxy, nylon, polyurethane, polyester, vinyl ester, phenolic resin, and resorcinol / formaldehyde / latex (RFL) resin.

4. The non-pneumatic tire according to claim 1, wherein each of the oblong cords is a monofilament cord made of a material of nylon or polyester.

5. The non-pneumatic tire according to claim 1, wherein the shear band further has an elastomer compound disposed between the oblong cords.

6. The non-pneumatic tire according to claim 5, wherein the shear modulus G'1% RPA of the elastomer compound is in the range of about 0.5 to about 15 MPa.

7. The non-pneumatic tire according to claim 1, wherein the oblong cords in each of the parallel layers are arranged in a staggered pattern in the lateral direction with respect to the oblong cords in adjacent layers.

8. The non-pneumatic tire according to claim 1, wherein the shear band further has at least one inner belt layer arranged radially between the connecting web and the plurality of oblong cords.

9. The non-pneumatic tire according to claim 8, wherein the at least one inner belt layer includes a plurality of elongated steel wire cords inclined at an angle between about -25 degrees and about 25 degrees with respect to the editing plane of the non-pneumatic tire.

10. The non-pneumatic tire according to claim 8, wherein the at least one inner belt layer includes a plurality of aromatic polyamide cords inclined at an angle of about -25 degrees to about 25 degrees with respect to the tread surface of the non-pneumatic tire.

11. The non-pneumatic tire according to claim 1, wherein the shear band further includes at least one outer belt layer disposed radially outside the plurality of oblong cords.

12. The non-pneumatic tire according to claim 11, wherein the shear band further includes a pair of end belts covering the lateral edges of the outer belt layer.

13. A shear band for a non-pneumatic tire, having a plurality of oblong cords arranged in parallel layers, each of the oblong cords having a cross-section with a lateral width greater than a radial height.

14. The shear band according to claim 13, wherein the oblong cord has any one of a nylon material, a polyester material, and / or a plurality of elongated glass, carbon fibers, and / or aromatic polyamide filaments incorporated in a resin matrix.

15. The shear band according to claim 14, wherein the oblong cord is incorporated in an elastomer compound.

16. The shear band according to claim 15, wherein the elastomer compound exhibits a shear modulus of elasticity G'1% RPA in the range of about 0.5 to about 15 MPa.

17. A lower belt layer disposed radially inside the plurality of oblong cords, and an upper belt layer disposed radially outside the plurality of oblong cords, The shear band according to claim 13, further comprising.

18. The shear band according to claim 17, wherein the lower belt layer has at least one of an elongated steel wire cord and / or an aromatic polyamide cord inclined in a range of about ±25 degrees with respect to the tread surface of the shear band.

19. A method for manufacturing a shear band for a non-pneumatic tire, pressing a plurality of filaments together to form an oblong cord having a cross-section with a lateral width greater than a radial height, heat-treating the oblong cord, forming the shear band by attaching the oblong cord to a plurality of parallel circumferential layers.

20. The method according to claim 19, further comprising incorporating the plurality of oblong codes into an elastomer compound.

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