A double-layered rubber band

Abstract

The utility model discloses a double -deck rubber band, solve the problem that current product double -deck structure is actually simple superposition, tenacity and strength are insufficient. The rubber band includes double -deck muscle and both sides reinforcing rib, the first layer muscle film and the second layer muscle film of double -deck muscle realize molecular chain crosslinking through arc strength film, and arc strength film adopts gradient vulcanization process and forms covalent bond connection, promotes interlayer peeling strength to 4.5N / mm, solves interlayer peeling problem. The reinforcing rib is composed of arc reinforcing sheet, first reinforcing strip, second reinforcing strip and reinforcing column, forms the three -dimensional support system similar to " I -steel ", and reinforcing column is evenly distributed in double -deck muscle both sides, and the stress is dispersed when drawing, and local strain is reduced. This design makes the rubber band breaking elongation reach 800%-1000%, and the fatigue life is improved by more than 5 times, is applicable to industrial packaging, sports training and other high -frequency tensile scene, and the mechanical property is enhanced significantly.

Description

Technical Field

[0001] This utility model relates to the field of rubber band technology, specifically a double-layer rubber band. Background Technology

[0002] A rubber band is a ring-shaped elastic object made of rubber, possessing excellent elasticity and flexibility. It is typically round and comes in various colors, with black, red, and yellow being common choices.

[0003] Rubber bands are primarily made of rubber, processed through vulcanization and other techniques. Their elasticity stems from the stretching and resilience of the rubber molecular chains.

[0004] Rubber bands have a wide range of uses in daily life. They can be used to tie items, such as hair, documents, and packages; in handicrafts, they are important auxiliary materials that help fix objects or create flexible structures; in laboratories, rubber bands are sometimes used to secure experimental equipment.

[0005] Currently, most mainstream rubber bands on the market are made from a single rubber raw material through extrusion molding. While a few products claim to have a "double-layer structure," they are actually just two simple layers of rubber stacked together, lacking effective bonding between the layers, and essentially still fall into the category of a single-layer structure. These types of rubber bands have the following structural defects:

[0006] Insufficient mechanical properties: The single or simple superimposed double-layer structure limits the tensile strength and toughness of rubber bands. For example, the elongation at break of traditional double-layer rubber bands is usually only 300%-400%. When used for binding heavy objects or high-frequency stretching scenarios (such as industrial packaging and fixing sports training equipment), they are prone to breakage or permanent deformation due to stress concentration.

[0007] Weak interlayer bonding: Existing double-layer structures are mostly formed in one step through co-extrusion, but the molecular chains of the two rubber layers do not form effective cross-links. During repeated stretching, interlayer delamination is prone to occur, leading to structural failure. Experimental data shows that after 500 cycles of stretching, the interlayer delamination rate of traditional double-layer rubber bands is as high as 65%, while the breakage risk of single-structure products increases by 30%.

[0008] Functional limitation: A single structure cannot achieve an optimal combination of material properties. For example, the inner layer needs to balance elasticity and tear resistance, while the outer layer needs to enhance wear resistance or slip resistance. However, existing processes cannot meet multiple performance requirements in a single structure at the same time, resulting in poor overall performance of rubber bands in complex scenarios (such as humid environments and high-frequency use).

[0009] Therefore, developing a rubber band with a true bilayer structure that has molecular-level cross-linking, high strength, high toughness, and a functional surface has become a key technological direction for solving the mechanical performance bottleneck of existing products. Utility Model Content

[0010] The purpose of this invention is to provide a double-layer rubber band to solve the problems mentioned in the background art.

[0011] To achieve the above objectives, this utility model provides the following technical solution: a double-layer rubber band, comprising a double-layer rib, wherein reinforcing ribs are integrally formed on both sides of the double-layer rib;

[0012] The reinforcing rib includes an arc-shaped reinforcing sheet, a first reinforcing strip is integrally formed on the top inner side of the arc-shaped reinforcing sheet, a second reinforcing strip is integrally formed on the bottom inner side of the arc-shaped reinforcing sheet, and a reinforcing column is integrally formed between the first reinforcing strip and the second reinforcing strip.

[0013] The double-layer fascia includes a first fascia and a second fascia. The first fascia is integrally formed on the top inner side of the arc-shaped reinforcing sheet, and the second fascia is integrally formed on the bottom inner side of the arc-shaped reinforcing sheet. An arc-shaped strength membrane is integrally formed between the first fascia and the second fascia.

[0014] Preferably, both sides of the first and second fascia layers are integrally formed with arc-shaped reinforcing sheets, and the outer side of the reinforcing column is integrally formed with the arc-shaped reinforcing sheets.

[0015] Preferably, the reinforcing columns are evenly distributed on the inner side of the arc-shaped reinforcing sheet, and the thickness of the first fascia layer and the second fascia layer is equal to the thickness of the first reinforcing strip and the second reinforcing strip.

[0016] Preferably, an installation membrane is integrally formed between the first fascia layer and the second fascia layer, and an arc-shaped strength membrane is integrally formed on the inner side of the installation membrane.

[0017] Preferably, the arc-shaped strength membranes are densely distributed at equal intervals within the first and second fascia layers, and the first and second fascia layers have symmetrical arc-shaped strength membranes on both sides.

[0018] Compared with the prior art, the present invention provides a double-layer rubber band, which has the following beneficial effects:

[0019] 1. This double-layer rubber band achieves molecular chain cross-linking through an arc-shaped strength membrane between the first and second fascia layers, unlike traditional simple stacked structures. The arc-shaped strength membrane employs a gradient vulcanization process, enabling the two rubber molecular chains to form covalent bonds at the interface, thus solving the problem of interlayer delamination.

[0020] 2. The double-layer rubber band, through the arc-shaped reinforcing plates on both sides, forms an integrated structure with the double-layer ribs via the first reinforcing strip, the second reinforcing strip, and the reinforcing column. The reinforcing column is cylindrical and evenly distributed on both sides of the double-layer ribs, forming a mechanical support system similar to an "I-beam", which disperses the tensile stress throughout the entire structure and avoids local concentration. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 This is a top view of the overall structure of this utility model;

[0024] Figure 3 This is a schematic diagram of the middle section of the overall structure of this utility model.

[0025] In the diagram: 1. Reinforcing rib; 11. First reinforcing strip; 12. Second reinforcing strip; 13. Arc-shaped reinforcing plate; 14. Reinforcing column; 2. Double-layer rib; 21. First layer of fascia; 22. Second layer of fascia; 23. Installation membrane; 24. Arc-shaped strength membrane. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] This utility model provides the following technical solution:

[0029] Example 1

[0030] Please see Figure 1-3 A double-layer rubber band includes a double-layer rib 2, and the double-layer rib 2 has reinforcing ribs 1 integrally formed on both sides;

[0031] The reinforcing rib 1 includes an arc-shaped reinforcing sheet 13, a first reinforcing strip 11 integrally formed on the top inner side of the arc-shaped reinforcing sheet 13, a second reinforcing strip 12 integrally formed on the bottom inner side of the arc-shaped reinforcing sheet 13, and a reinforcing column 14 integrally formed between the first reinforcing strip 11 and the second reinforcing strip 12.

[0032] The double-layer fascia 2 includes a first fascia 21 and a second fascia 22. The first fascia 21 is integrally formed on the top inner side of the arc-shaped reinforcing sheet 13, and the second fascia 22 is integrally formed on the bottom inner side of the arc-shaped reinforcing sheet 13. An arc-shaped strength membrane 24 is integrally formed between the first fascia 21 and the second fascia 22.

[0033] The first fascia 21 and the second fascia 22 are cross-linked through an arc-shaped strength membrane 24, which differs from the traditional simple superimposed structure. The arc-shaped strength membrane 24 adopts a gradient vulcanization process, which enables the two rubber molecular chains to form covalent bonds at the interface, thus solving the problem of interlayer delamination.

[0034] The curved reinforcing plates 13 on both sides form an integrated structure with the double-layer ribs 2 through the first reinforcing strip 11, the second reinforcing strip 12 and the reinforcing column 14. The reinforcing column 14 is cylindrical and evenly distributed on both sides of the double-layer ribs 2, forming a mechanical support system similar to "I-beams", which disperses the tensile stress to the entire structure and avoids local concentration.

[0035] Example 2

[0036] Please see Figure 1-3 Furthermore, based on Example 1, both sides of the first fascia 21 and the second fascia 22 are integrally formed with arc-shaped reinforcing sheets 13, and the outer side of the reinforcing column 14 is integrally formed with the arc-shaped reinforcing sheets 13.

[0037] The reinforcing columns 14 are evenly distributed on the inner side of the arc-shaped reinforcing sheet 13, and the thickness of the first layer of fascia 21 and the second layer of fascia 22 is equal to the thickness of the first reinforcing strip 11 and the second reinforcing strip 12.

[0038] An installation membrane 23 is integrally formed between the first fascia layer 21 and the second fascia layer 22, and an arc-shaped strength membrane 24 is integrally formed on the inner side of the installation membrane 23.

[0039] Arc-shaped strength membranes 24 are densely distributed at equal intervals within the first layer of fascia 21 and the second layer of fascia 22, with arc-shaped strength membranes 24 symmetrically distributed on both sides of the first layer of fascia 21 and the second layer of fascia 22.

[0040] In actual operation, when this device is in use, the first fascia 21 and the second fascia 22 achieve molecular chain cross-linking through the arc-shaped strength membrane 24, which is different from the traditional simple superposition structure. The arc-shaped strength membrane 24 adopts a gradient vulcanization process, which enables the two rubber molecular chains to form covalent bonds at the interface, solving the problem of interlayer delamination.

[0041] The two arc-shaped reinforcing plates 13 form an integrated structure with the double-layer ribs 2 through the first reinforcing strip 11, the second reinforcing strip 12 and the reinforcing column 14. The reinforcing column 14 is cylindrical and evenly distributed on both sides of the double-layer ribs 2, forming a mechanical support system similar to "I-beams", which disperses the tensile stress to the entire structure and avoids local concentration.

[0042] 1. Molecular-level cross-linked double-layer reinforcement enhances mechanical properties.

[0043] This invention achieves deep fusion of the double-layer ribs 2 through a gradient vulcanization process:

[0044] The first layer of fascia 21 (thickness 0.5-1.0mm) is made of high-elasticity rubber (elongation at break 600%-800%) to ensure basic tensile performance; the second layer of fascia 22 (thickness 0.5-1.0mm) is made of high-abrasion-resistant rubber (abrasion loss <150mm³) to improve surface durability.

[0045] The arc-shaped strength film 24 (thickness 0.2-0.4mm) promotes the interdiffusion of the two rubber molecular chains during vulcanization, forming a transition layer with a thickness of 50-100μm, and the crosslinking density is 3 times higher than that of the traditional co-extrusion structure. Test data shows that the interlaminar peel strength of the double-layer rib 2 is increased from 1.2N / mm of the traditional product to 4.5N / mm, with no peeling after 500 cycles of tensile testing, and the elongation at break reaches 800%-1000%, meeting the requirements of heavy-duty binding.

[0046] 2. Stress Dispersion Mechanism of Three-Dimensional Reinforcing Rib Network

[0047] The three-dimensional structure of reinforcing rib 1 significantly improves the elastic band's resistance to breakage.

[0048] The arc-shaped reinforcing plate 13 (curvature radius 2-5mm) is attached to the outside of the double-layer rib 2 and forms a rigid connection with the double-layer rib 2 through the first reinforcing strip 11 and the second reinforcing strip 12. When the rubber band is stretched, the arc-shaped structure can convert the linear stress into a lateral dispersion force, reducing local strain (the strain concentration factor is reduced from 2.5 in the traditional structure to 1.3).

[0049] The reinforcing column 14, acting as a three-dimensional support point, generates a "ball bearing effect" during the tension of the double-layer rib 2, allowing slight relative sliding between the two fascia layers and preventing fracture caused by stress concentration. Experiments show that the rubber band with the reinforcing column 14, when subjected to a tensile force of 200N, has a maximum stress value that is 40% lower than that of the traditional structure, and its fatigue life (number of fracture cycles) is increased by more than 5 times, making it suitable for high-frequency tensile applications (such as industrial conveyor belt fixing and sports elastic ropes).

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A double-layer rubber band, comprising a double layer of reinforcing bars (2), characterized in that: The double-layer rib (2) has reinforcing ribs (1) integrally formed on both sides; The reinforcing rib (1) includes an arc-shaped reinforcing sheet (13), with a first reinforcing strip (11) integrally formed on the top inner side of the arc-shaped reinforcing sheet (13), and a second reinforcing strip (12) integrally formed on the bottom inner side of the arc-shaped reinforcing sheet (13). A reinforcing column (14) is integrally formed between the first reinforcing strip (11) and the second reinforcing strip (12). The double-layer fascia (2) includes a first fascia (21) and a second fascia (22). The first fascia (21) is integrally formed on the top inner side of the arc-shaped reinforcing sheet (13), and the second fascia (22) is integrally formed on the bottom inner side of the arc-shaped reinforcing sheet (13). An arc-shaped strength membrane (24) is integrally formed between the first fascia (21) and the second fascia (22).

2. The double-layer rubber band according to claim 1, characterized in that: Both sides of the first layer of fascia (21) and the second layer of fascia (22) are integrally formed with arc-shaped reinforcing plates (13), and the outer side of the reinforcing column (14) is integrally formed with the arc-shaped reinforcing plates (13).

3. A double-layer rubber band according to claim 1, characterized in that: The reinforcing columns (14) are evenly distributed on the inner side of the arc-shaped reinforcing sheet (13), and the thickness of the first layer of fascia (21) and the second layer of fascia (22) is equal to the thickness of the first reinforcing strip (11) and the second reinforcing strip (12).

4. A double-layer rubber band according to claim 1, characterized in that: An installation membrane (23) is integrally formed between the first fascia layer (21) and the second fascia layer (22), and an arc-shaped strength membrane (24) is integrally formed on the inner side of the installation membrane (23).

5. A double-layer rubber band according to claim 1, characterized in that: The arc-shaped strength membranes (24) are densely distributed at equal intervals within the first fascia (21) and the second fascia (22), with arc-shaped strength membranes (24) symmetrically distributed on both sides of the first fascia (21) and the second fascia (22).

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