Glueless nonskid layer structure and method of making same and stand up paddleboard having same

Abstract

The application discloses a glue-free anti-skid layer and a manufacturing method thereof, and the method comprises the following steps: providing an ethylene vinyl acetate (EVA) material layer; laying a thermoplastic polyurethane (TPU) material on at least one surface of the EVA material layer; heating the EVA material layer with the TPU material to a high temperature range, so that the surface of the EVA material layer enters a gelatinized state, and the TPU material is melted; in the heating process, the melted TPU material penetrates into the surface of the EVA material layer, and an interwoven interface layer is formed; and a glue-free anti-skid layer structure is formed after cooling. Through the thermoplastic behavior of the material itself, the EVA and the TPU are firmly combined without adding any adhesive, so that the environmental protection, durability and overall structural reliability of the product are improved, and therefore, the glue-free anti-skid layer structure manufactured by the application can be applied to a vertical paddle board.

Description

Technical Field

[0001] This invention relates to the technical field of anti-slip materials, specifically to a glue-free anti-slip layer structure that does not require additional adhesive, its manufacturing method, and a vertical paddleboard with a glue-free anti-slip layer structure. Background Technology

[0002] Stand-up paddleboarding (SUP) is a water sport. Users stand on a paddleboard and use long paddles to propel themselves across the water. In addition to being a recreational and fitness activity, it is also used in surfing, exploration, competition, lifesaving, and many other activities.

[0003] Currently available inflatable upright paddleboards generally use polyvinyl chloride (PVC) as the main structural and surface material, and use adhesives (such as glue) to bond an anti-slip layer of ethylene vinyl acetate (EVA) or other functional components to its surface. However, EVA material itself is not conducive to the adhesion of adhesives, resulting in limited bonding effectiveness.

[0004] Furthermore, plasticizers are typically added during the processing of PVC materials, and adhesives containing organic solvents are still needed to bond the EVA anti-slip layer to the PVC. These materials and processes can not only cause environmental pollution but also have adverse effects on human health. Moreover, PVC materials are prone to embrittlement at low temperatures, which affects the product's durability and user experience.

[0005] On the other hand, in recent years, thermoplastic polyurethane (TPU) has been increasingly used in the field of inflatable water products due to its excellent abrasion resistance, weather resistance, and relatively good environmental properties. However, the reliable bonding between the EVA anti-slip layer and the TPU substrate still largely relies on adhesives. These adhesives are prone to embrittlement or failure under long-term use or environmental changes, thus affecting the product's lifespan and structural reliability.

[0006] Therefore, how to achieve a stable bond between the EVA anti-slip layer and the TPU substrate without using adhesives, while also ensuring environmental friendliness and product durability, is a problem that urgently needs to be solved in this technical field.

[0007] In summary, the inventors of this invention have, through years of painstaking research, contemplation, and design, developed a glue-free anti-slip layer structure and its manufacturing method, as well as a vertical paddleboard with this structure, in order to improve upon the shortcomings of known technologies and thereby enhance industrial implementation and utilization. Summary of the Invention

[0008] The main objective of this invention is to provide a glue-free anti-slip layer structure and its manufacturing method. By utilizing the thermoplastic behavior of the materials themselves, a strong bond is achieved between EVA and TPU without the addition of any additional adhesives (e.g., glue), thereby improving the product's environmental friendliness, durability, and overall structural reliability. Furthermore, the glue-free anti-slip layer structure produced by this invention can be applied to upright paddling boards, thereby overcoming the problem of relying on adhesives to bond the EVA anti-slip layer to the TPU substrate in known upright paddling boards.

[0009] Therefore, to achieve the above objectives, the present invention provides a method for manufacturing a glue-free anti-slip layer structure, comprising the following steps: Step 1: providing an ethylene vinyl acetate (EVA) material layer; Step 2: laying a thermoplastic polyurethane (TPU) material on at least one surface of the EVA material layer; Step 3: heating the EVA material layer with the TPU material laid on it to a high temperature range, causing the surface of the EVA material layer to enter a gel state and melting the TPU material layer, wherein during the heating process, the molten TPU material penetrates into the surface of the EVA material layer to form an interwoven interface layer; and Step 4: forming a glue-free anti-slip layer structure after cooling.

[0010] The manufacturing method of the glue-free anti-slip layer structure described above, wherein the TPU material layer is TPU powder.

[0011] The manufacturing method of the glue-free anti-slip layer structure described above, wherein the EVA material layer is a foamed layer without a skin.

[0012] The manufacturing method of the glue-free anti-slip layer structure described above, wherein the high temperature range is 160~200 degrees Celsius.

[0013] The manufacturing method of the glue-free anti-slip layer structure described above, wherein the interwoven interface layer does not contain any additional glue.

[0014] The manufacturing method of the glue-free anti-slip layer structure described above further includes roll-pressing one side of the TPU material layer in a molten state onto the surface of a TPU coating layer of a main body.

[0015] Furthermore, the present invention also provides an adhesive-free anti-slip layer structure manufactured by the above-described method for manufacturing an adhesive-free anti-slip layer structure, comprising: an ethylene vinyl acetate (EVA) material layer; and a thermoplastic polyurethane (TPU) material layer disposed on at least one surface of the EVA material layer; wherein, an interwoven interface layer is provided between the EVA material layer and the TPU material layer, the interwoven interface layer being formed by the EVA material layer and the TPU material layer interweaving each other under heating conditions, thereby forming an adhesive-free anti-slip layer structure between the TPU material layer and the EVA layer.

[0016] As described above, the adhesive-free anti-slip layer structure is wherein the TPU material layer is composed of TPU powder.

[0017] In addition, the present invention also provides a vertical paddleboard with a glue-free anti-slip layer structure, comprising a paddleboard body, wherein the paddleboard body comprises at least: a main body, the surface of which is at least composed of a TPU coating layer made of thermoplastic polyurethane (TPU) material; and a glue-free anti-slip layer structure as described above; wherein the glue-free anti-slip layer structure is roll-pressed to the surface of the TPU coating layer of the main body with one side of the TPU material layer having a molten state.

[0018] The vertical paddleboard with a glue-free anti-slip layer structure described above further includes a spatial braided layer and a base fabric layer. The base fabric layer is located between the spatial braided layer and the TPU coating layer, and a circumferential band structure is provided on the side of the main body.

[0019] The vertical paddleboard with a glue-free anti-slip layer structure described above further includes an inner side band and an outer side band. Attached Figure Description

[0020] Figure 1 This is a schematic flowchart of the manufacturing method of the adhesive-free anti-slip layer structure of the present invention;

[0021] Figure 2 This is a cross-sectional schematic diagram of the adhesive-free anti-slip layer structure of the present invention;

[0022] Figure 3A This is a three-dimensional schematic diagram of the vertical paddleboard with a glue-free anti-slip layer structure according to the present invention;

[0023] Figure 3B This is a cross-sectional view along line BB in Figure 3A.

[0024] [Explanation of Labels in the Attached Image]

[0025] Steps S1~S4

[0026] 10. Adhesive-free anti-slip layer structure

[0027] 11 EVA material layer

[0028] 12 TPU material layers

[0029] 13 Interwoven Interface Layer

[0030] A vertical paddleboard with a glue-free anti-slip layer structure

[0031] 100 main body

[0032] 101 Space Brass Layer

[0033] 102 Base Fabric Layer

[0034] 103 TPU coating layer

[0035] 104 Enclosing Belt Structure

[0036] 1041 Inner side sash

[0037] 1042 Outer perimeter band Detailed Implementation

[0038] The embodiments of the present invention will now be described with reference to the accompanying drawings. This description is not intended to limit the embodiments of the present invention, but rather to illustrate one example of the invention.

[0039] First, such as Figure 1 As shown, the present invention provides a method for manufacturing a glue-free anti-slip layer structure, comprising at least the following steps: Step 1 S1: providing an ethylene vinyl acetate (EVA) material layer; Step 2 S2: laying thermoplastic polyurethane (TPU) material on at least one surface of the EVA material layer; Step 3 S3: heating the EVA material layer with the TPU material laid on it to a high temperature range, causing the surface of the EVA material layer to enter a gel state and melting the TPU material layer, wherein during the heating process, the molten TPU material penetrates into the surface of the EVA material layer to form an interwoven interface layer; and Step 4 S4: forming a glue-free anti-slip layer structure after cooling.

[0040] Further explanation: In one embodiment, the EVA material layer is a skinless foamed layer. This skinless foamed layer refers to the EVA material layer after foaming, where the shiny surfaces (e.g., the upper and lower surfaces) in contact with the mold are removed. In one embodiment, during step S3, the high temperature range is 160-200 degrees Celsius. For example, an oven can be used to heat the EVA material layer with the TPU material to approximately 180 degrees Celsius. During heating and baking, the molten TPU material penetrates the surface of the EVA material layer, forming an interwoven interface layer composed of EVA and TPU. After natural cooling, a stable composite structure is formed. This allows the EVA material layer and the TPU material to be bonded without adding additional adhesive, as the interwoven interface layer does not contain any additional adhesive. The TPU material layer can be composed of TPU powder, granules, or even other forms; preferably, the TPU material layer is TPU powder.

[0041] like Figure 2 As shown, the present invention also provides an adhesive-free anti-slip layer structure 10 manufactured by the aforementioned method for manufacturing an adhesive-free anti-slip layer structure, comprising: an ethylene vinyl acetate (EVA) material layer 11; and a thermoplastic polyurethane (TPU) material layer 12 disposed on at least one surface of the EVA material layer 11; wherein, an interwoven interface layer 13 is provided between the EVA material layer 11 and the TPU material layer 12, the interwoven interface layer 13 being formed by the EVA material layer 11 and the TPU material layer 12 interweaving each other under a heated state, thereby forming an adhesive-free anti-slip layer structure 10 between the TPU material layer 12 and the EVA layer 11.

[0042] Therefore, when the EVA material layer 11 and the TPU material layer 12 are heated and bonded together, an interwoven interface layer 13 is formed at their contact surface without the need for additional adhesive. Preferably, the TPU material layer 12 is composed of TPU powder. Furthermore, the adhesive-free anti-slip layer structure 10 is also roll-pressed with one side of the molten TPU material layer 12 onto the surface of a TPU coating layer of a main body (e.g., a paddleboard body).

[0043] Therefore, the adhesive-free anti-slip layer structure and its manufacturing method of the present invention have the following advantages: 1. It can avoid the emission of volatile organic compounds and the aging of the adhesive layer; 2. It forms a stable bond through material interface reconstruction, and has excellent properties such as heat resistance and hydrolysis resistance; 3. It is suitable for inflatable paddleboards used in long-term sun exposure and humid environments; 4. The manufacturing process can be implemented industrially and is suitable for continuous production.

[0044] Due to the advantages mentioned above, such as Figure 3A and 3B As shown, the present invention also provides a vertical paddleboard A with a glue-free anti-slip layer structure, including a paddleboard body, the paddleboard body including at least: a main body 100, the surface of the main body 100 being at least a TPU coating layer 103 made of thermoplastic polyurethane (TPU) material; and a glue-free anti-slip layer structure 10 as described above; wherein the glue-free anti-slip layer structure 10 is roll-pressed to the surface of the TPU coating layer 103 of the main body 100 with one side of the TPU material layer 12 having a molten state.

[0045] In step three S3 of the aforementioned method for manufacturing the adhesive-free anti-slip layer structure, the roll-pressing process involves forming an interwoven interface layer composed of EVA and TPU during the heating process. While still hot and not yet cooled, the layer is roll-pressed onto the surface of the TPU coating layer 103 of the main body 100. After cooling to below the TPU softening temperature, a stable and irreversible composite structure is formed.

[0046] like Figure 3B As shown, the main body 100 also includes a spatial braided layer 101 and a base fabric layer 102. The base fabric layer 102 is located between the spatial braided layer 101 and the TPU coating layer 103, and a webbing structure 104 is provided on the side of the main body 100. Preferably, the webbing structure 104 further includes an inner webbing 1041 and an outer webbing 1042, thereby meeting the requirements for mechanical strength and appearance.

[0047] Therefore, this invention provides a glue-free anti-slip layer structure and its manufacturing method. Through the thermoplastic behavior of the materials themselves, a strong bond is achieved between EVA and TPU without the addition of any adhesives (e.g., glue), thereby improving the product's environmental friendliness, durability, and overall structural reliability. Furthermore, the glue-free anti-slip layer structure produced by this invention can be applied to upright paddling boards, thereby overcoming the problem of relying on adhesives to bond the EVA anti-slip layer to the TPU substrate in known upright paddling boards.

[0048] The specific embodiments described above are merely specific embodiments of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the description of the invention shall still fall within the scope of the patent of the present invention.

Claims

1. A method for manufacturing a glue-free anti-slip layer structure, comprising the following steps: Step 1: Provide an ethylene-vinyl acetate material layer; Step 2: Lay a thermoplastic polyurethane material layer on at least one surface of the ethylene-vinyl acetate material layer; Step 3: Heat the ethylene-vinyl acetate material layer on which the thermoplastic polyurethane material layer is laid to a high temperature range, so that the surface of the ethylene-vinyl acetate material layer enters a gel state and the thermoplastic polyurethane material layer melts. During the heating process, the molten thermoplastic polyurethane material penetrates into the surface of the ethylene-vinyl acetate material layer to form an interwoven interface layer. as well as Step 4: After cooling, a glue-free anti-slip layer structure is formed.

2. The method for manufacturing the adhesive-free anti-slip layer structure according to claim 1, wherein the thermoplastic polyurethane material layer is thermoplastic polyurethane powder.

3. The method for manufacturing the adhesive-free anti-slip layer structure according to claim 1, wherein the ethylene-vinyl acetate material layer is a foamed layer without a skin.

4. The method for manufacturing the adhesive-free anti-slip layer structure according to claim 1, wherein the high temperature range is 160~200 degrees Celsius.

5. The method for manufacturing the adhesive-free anti-slip layer structure according to claim 1, wherein the interwoven interface layer does not contain any additional adhesive.

6. The method for manufacturing the adhesive-free anti-slip layer structure according to claim 1, wherein the adhesive-free anti-slip layer structure is further roll-pressed with one side of the thermoplastic polyurethane material layer having a molten state onto the surface of a main body thermoplastic polyurethane coating layer.

7. A glue-free anti-slip layer structure manufactured by the method of manufacturing the glue-free anti-slip layer structure according to any one of claims 1 to 5, comprising: Ethylene-vinyl acetate material layer; as well as A thermoplastic polyurethane material layer is disposed on at least one surface of the ethylene-vinyl acetate material layer; There is an interwoven interface layer between the ethylene-vinyl acetate material layer and the thermoplastic polyurethane material layer. The interwoven interface layer is formed by the ethylene-vinyl acetate material layer and the thermoplastic polyurethane material layer interweaving each other under heating conditions, thus forming a glue-free anti-slip layer structure between the thermoplastic polyurethane material layer and the ethylene-vinyl acetate material layer.

8. The adhesive-free anti-slip layer structure according to claim 7, wherein the thermoplastic polyurethane material layer is composed of thermoplastic polyurethane powder.

9. A vertical paddleboard with a glue-free anti-slip layer structure, comprising a paddleboard body, wherein, The paddle plate body includes at least: A main body, the surface of which is at least covered by a thermoplastic polyurethane coating made of thermoplastic polyurethane material; and The adhesive-free anti-slip layer structure according to claim 7; In this structure, the adhesive-free anti-slip layer is formed by rolling one side of the thermoplastic polyurethane material layer in a molten state onto the surface of the thermoplastic polyurethane coating layer of the main body.

10. The vertical paddleboard with a glue-free anti-slip layer structure according to claim 9, wherein the main body further includes a spatial braid layer and a base fabric layer, the base fabric layer being located outside the spatial braid layer and between the thermoplastic polyurethane coating layer, and a circumferential band structure is provided on the side of the main body.

11. The vertical paddleboard with a glue-free anti-slip layer structure according to claim 10, wherein the belt structure further includes an inner belt and an outer belt.

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