Composite EVA foam

Abstract

The utility model discloses composite EVA foam, and relates to the technical field of EVA foam. Comprising a main body layer, the main body layer comprises a foam layer for supporting and coating a supporting layer, and the foam layer is EVA foam; a first damp-proof layer is arranged above the main body layer; a first moisture-proof layer is arranged on the outer sheath, a reinforcing layer is arranged on the first moisture-proof layer, a first fireproof layer is arranged on the reinforcing layer, a first outer sheath is arranged on the first fireproof layer, and the first fireproof layer is suitable for bonding the outer sheath and the reinforcing layer; the supporting layer is in a grid shape and is made of a hard resin material, and the EVA is provided with convex blocks and is suitable for being embedded into grids of the supporting layer; according to the technical scheme provided by the invention, the comprehensive performance of the EVA foam for the cushion is effectively improved by reasonably compounding the multi-layer structure.

Description

Technical Field

[0001] The present application relates to the technical field of EVA foam, and in particular to a composite EVA foam. Background Art

[0002] EVA foam is a high-quality foam material made of ethylene vinyl acetate (EVA). Due to its non-toxic, lightweight and elastic characteristics, it is widely used in various fields, including sports equipment, shoes, furniture and so on.

[0003] In the furniture field, it is often used as a filling for some cushions, sofas and other furniture. However, in the fierce competition in the furniture market, a single type of EVA cushion filling foam has been difficult to meet market demand. The performance of a single type of EVA foam is limited, the comprehensive performance is not outstanding enough, and the market competitiveness is weak. Therefore, there is still room for further improvement. Utility Model Content

[0004] The purpose of this application is to provide a composite EVA foam to solve at least one of the above technical problems.

[0005] In order to solve the above technical problems, the present application provides a composite EVA foam, comprising a main body layer, wherein the main body layer comprises a foam layer supporting and covering the supporting layer, wherein the foam layer is EVA foam;

[0006] A first moisture-proof layer is provided above the main body layer; a reinforcement layer is provided above the first moisture-proof layer, a first fireproof layer is provided above the reinforcement layer, and a first outer protective layer is provided above the first fireproof layer, wherein the first fireproof layer is suitable for bonding the outer protective layer and the reinforcement layer;

[0007] The support layer is in a grid shape and is made of a hard resin material, and the EVA is formed with bumps and is suitable for being embedded in the grid of the support layer;

[0008] In the above implementation process, this scheme improves the performance of EVA foam used in traditional seat cushions through a reasonable composite multi-layer structure; among them, the main body can be understood as the main component, which is composed of EVA foam and a support layer. The support layer is made of hard resin material, and is arranged into a grid-like structure and interlocked with the protrusions formed by the EVA foam, which effectively improves the stability of the main layer structure. In addition, the hard resin material can provide support for the main structure to avoid it being too soft when used as a seat cushion, while taking into account the unique elasticity of EVA foam, thereby improving its comprehensive performance; further, a first moisture-proof layer is further compounded on the main layer to prevent external moisture from invading the interior of the main layer, which can effectively reduce the risk of moisture and mildew, and the reinforcement layer set on the first moisture-proof layer can improve the overall impact resistance. The first fireproof layer is used to bond the first outer protective layer and the reinforcement layer. While taking into account the bonding function, it also improves the overall fire retardant performance. It can be seen that this scheme effectively improves the comprehensive performance of EVA foam used for seat cushions through a reasonable composite multi-layer structure.

[0009] Preferably, a hollow portion is formed in the support layer, and the hollow portion is filled with a flame retardant filler;

[0010] In the above implementation process, this solution sets up a hollow part inside the supporting layer and fills the hollow part with flame-retardant filler, wherein the first fireproof layer provides the first layer of fire barrier. When the fire further breaks through the first fireproof layer and enters the main layer, the flame-retardant filler at this time can effectively prevent the flame from continuing to burn, realizing two layers of barrier and further improving the overall fire-retardant performance.

[0011] Preferably, the first fireproof layer comprises PUR flame retardant glue;

[0012] In the above implementation process, the first fireproof layer in this solution uses PUR flame retardant glue, which has good adhesion and excellent fireproof performance.

[0013] Preferably, the first outer protective layer comprises ribbed flame retardant cloth;

[0014] In the above implementation process, this solution uses threaded flame-retardant cloth as the first outer protective layer, which can cooperate with PUR flame-retardant glue. The PUR flame-retardant glue can partially penetrate into the threaded flame-retardant cloth. At the same time, the ribbed flame-retardant cloth itself also has certain flame-retardant properties. After the PUR flame-retardant glue penetrates, the flame spread speed can be further reduced and the flame-retardant performance can be improved.

[0015] Preferably, the reinforcement layer is made of carbon fiber material;

[0016] In the above implementation process, this solution uses carbon fiber material as the reinforcement layer. Firstly, its lightness is taken into consideration, and secondly, it can effectively improve the overall impact resistance. The carbon fiber reinforcement layer provides sufficient hardness while having a certain degree of flexibility to protect the internal structure and extend the service life of the seat cushion.

[0017] Preferably, a second moisture-proof layer is provided below the main body layer;

[0018] Preferably, the first moisture-proof layer and the second moisture-proof layer both include XPE moisture-proof pads;

[0019] In the above implementation process, this solution further sets a second moisture-proof layer under the main layer. The double moisture-proof layer design can more comprehensively protect the main layer to improve the moisture-proof performance; XPE moisture-proof pad is selected as the moisture-proof layer, which not only has excellent moisture-proof performance but also has strong durability, thereby effectively improving the service life when used as a seat cushion.

[0020] Preferably, a second outer protective layer is provided below the second moisture-proof layer, and the second outer protective layer comprises ribbed flame-retardant cloth.

[0021] Compared with the prior art, the beneficial effect of the present application is that: this scheme improves the performance of EVA foam used in traditional seat cushions through a reasonable composite multi-layer structure; wherein, the main body can be understood as the main component, which is composed of EVA foam and a support layer. The support layer is made of a hard resin material, and is arranged into a grid-like structure and interlocked with the protrusions formed by the EVA foam, which effectively improves the stability of the main layer structure. In addition, the hard resin material can provide support for the main structure to avoid it being too soft when used as a seat cushion, while taking into account the unique elasticity of EVA foam, thereby improving its comprehensive performance; further, a first moisture-proof layer is further compounded on the main layer to prevent external moisture from invading the interior of the main layer, which can effectively reduce the risk of moisture and mildew, and the reinforcement layer set on the first moisture-proof layer can improve the overall impact resistance. The first fireproof layer is used to bond the first outer protective layer and the reinforcement layer. While taking into account the bonding function, it also improves the overall fire retardant performance. It can be seen that this scheme effectively improves the comprehensive performance of EVA foam used for seat cushions through a reasonable composite multi-layer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present application;

[0024] Figure 2 This is a schematic structural diagram of the main body layer of one embodiment of the present application;

[0025] Figure 3 This is a schematic diagram of the cross-sectional structure of a support layer according to one embodiment of the present application;

[0026] Among them: 10, main body layer; 11, supporting layer; 111, flame retardant filler; 12, foam layer; 20, first moisture-proof layer; 21, second moisture-proof layer; 30, reinforcement layer; 40, first fireproof layer; 50, first outer protective layer; 51, second outer protective layer. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be understood as limiting the present application.

[0028] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections, electrical connections, or mutual communication; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] In the description of this application, it should be understood that the terms "upper", "lower", "side", "front", "rear", etc. indicate orientations or positional relationships based on the installation, and are only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on this application.

[0031] In the description of this application, it should be noted that the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone.

[0032] It should also be noted that, in the embodiments of the present application, the same figure mark represents the same component or the same part. For the same parts in the embodiments of the present application, the figure may only mark one of the parts or components as an example. It should be understood that the figure mark also applies to other identical parts or components.

[0033] In order to further understand the content, features and effects of the utility model of the present application, the following embodiments are given as examples and described in detail with reference to the accompanying drawings:

[0034] Example

[0035] EVA foam is a high-quality foam material made of ethylene vinyl acetate (EVA). Due to its non-toxic, lightweight and elastic characteristics, it is widely used in various fields, including sports equipment, shoes, furniture and so on.

[0036] In the furniture field, it is often used as a filling for some cushions, sofas and other furniture. However, in the fierce competition in the furniture market, a single type of EVA seat cushion filling foam has been difficult to meet market demand. A single type of EVA foam has limited performance, insufficient comprehensive performance, and weak market competitiveness. Therefore, there is still room for further improvement. In order to solve the above technical problems, this embodiment provides the following technical solutions:

[0037] Specifically, this embodiment provides a composite EVA foam, see Figure 1-3 , including a main body layer 10, the main body layer 10 includes a foam layer 12 supporting and covering the support layer 11, and the foam layer 12 is EVA foam;

[0038] A first moisture-proof layer 20 is provided above the main body layer 10; a reinforcement layer 30 is provided above the first moisture-proof layer 20, a first fireproof layer 40 is provided above the reinforcement layer 30, and a first outer protective layer 50 is provided above the first fireproof layer 40. The first fireproof layer 40 is suitable for bonding the outer protective layer and the reinforcement layer 30;

[0039] Furthermore, the support layer 11 is in a grid shape and is made of a hard resin material, and the EVA is formed with bumps and is suitable for being embedded in the grid of the support layer 11;

[0040] In the above scheme, this scheme improves the performance of the EVA foam used in traditional seat cushions through a reasonable composite multi-layer structure; wherein, the main body can be understood as the main component, which is composed of EVA foam and a support layer 11. The support layer 11 is made of a hard resin material and is arranged in a grid-like structure and interlocked with the protrusions formed by the EVA foam, thereby effectively improving the stability of the main body layer 10 structure. In addition, the hard resin material can provide support for the main structure, avoiding being too soft when used as a seat cushion, while taking into account the unique elasticity of the EVA foam. In order to improve its comprehensive performance; further, a first moisture-proof layer 20 is further compounded on the main body layer 10, which can prevent external moisture from invading the interior of the main body layer 10 and effectively reduce the risk of moisture and mildew. The reinforcement layer 30 provided on the first moisture-proof layer 20 can improve the overall impact resistance. The first fireproof layer 40 is used to bond the first outer protective layer 50 and the reinforcement layer 30. While taking into account the bonding function, it also improves the overall fire retardant performance. It can be seen that this solution effectively improves the comprehensive performance of EVA foam used for seat cushions through a reasonable composite multi-layer structure.

[0041] For details, see Figure 3 , a hollow portion is formed in the supporting layer 11, and the hollow portion is filled with a flame retardant filler 111;

[0042] In the above scheme, a hollow portion is set inside the supporting layer 11, and a flame-retardant filler 111 is filled in the hollow portion, wherein the first fireproof layer 40 provides a first layer of fire barrier. When the fire further breaks through the first fireproof layer 40 and enters the main layer 10, the flame-retardant filler 111 at this time can effectively prevent the flame from continuing to burn, thereby achieving two layers of barrier and further improving the overall fire-retardant performance.

[0043] In one embodiment, the flame retardant filler 111 includes polyurethane foam.

[0044] Specifically, the first fireproof layer 40 includes PUR flame retardant glue;

[0045] In the above solution, the first fireproof layer 40 in this solution is made of PUR flame-retardant glue, which has good adhesion and excellent fireproof performance.

[0046] Specifically, the first outer sheath 50 includes ribbed flame retardant fabric;

[0047] In the above scheme, this scheme uses threaded flame-retardant cloth as the first outer protective layer 50, which can cooperate with PUR flame-retardant glue. The PUR flame-retardant glue can partially penetrate into the threaded flame-retardant cloth. At the same time, the ribbed flame-retardant cloth itself also has certain flame-retardant properties. After the PUR flame-retardant glue penetrates, the flame spread speed can be further reduced and the flame-retardant properties can be improved.

[0048] Specifically, the reinforcement layer 30 is made of carbon fiber material;

[0049] In the above scheme, this scheme selects carbon fiber material as the reinforcement layer 30. Firstly, its lightness is taken into consideration, and secondly, it can effectively improve the overall impact resistance. The carbon fiber reinforcement layer 30 provides sufficient hardness to protect the internal structure and extend the service life of the seat cushion while having a certain flexibility.

[0050] Specifically, a second moisture-proof layer 21 is provided below the main body layer 10;

[0051] Furthermore, the first moisture-proof layer 20 and the second moisture-proof layer 21 both include XPE moisture-proof pads;

[0052] In the above scheme, this scheme further sets a second moisture-proof layer 21 under the main layer 10. The design of the double moisture-proof layer can more comprehensively protect the main layer 10 to improve the moisture-proof performance; XPE moisture-proof pad is selected as the moisture-proof layer, which not only has excellent moisture-proof performance but also has strong durability, thereby effectively improving the service life when used as a seat cushion.

[0053] Specifically, a second outer protective layer 51 is provided below the second moisture-proof layer 21, and the second outer protective layer 51 includes a ribbed flame-retardant cloth.

[0054] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0055] The above description is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application fall within the scope of the technical solution of the present application.

Claims

1. A composite EVA foam, characterized in that: include A main body layer, the main body layer comprising a support layer and a foam layer covering the support layer, the foam layer being EVA foam; A first moisture-proof layer is provided above the main body layer; a reinforcement layer is provided above the first moisture-proof layer, a first fireproof layer is provided above the reinforcement layer, and a first outer protective layer is provided above the first fireproof layer, and the first fireproof layer is suitable for bonding the first outer protective layer and the reinforcement layer; The support layer is in a grid shape and is made of a hard resin material. The EVA is formed with bumps and is suitable for being embedded in the grid of the support layer.

2. The composite EVA foam according to claim 1, characterized in that: A hollow portion is formed in the supporting layer, and the hollow portion is filled with a flame retardant filler.

3. The EVA foam according to claim 1, characterized in that: The first fireproof layer includes PUR flame retardant glue.

4. The EVA foam according to claim 1, characterized in that: The first outer sheath comprises a ribbed flame retardant fabric.

5. The EVA foam according to claim 1, characterized in that: The reinforcement layer is made of carbon fiber material.

6. The EVA foam according to any one of claims 1 to 5, characterized in that: A second moisture-proof layer is arranged below the main body layer.

7. The EVA foam according to claim 6, characterized in that: The first moisture-proof layer and the second moisture-proof layer both include XPE moisture-proof pads.

8. The EVA foam according to claim 7, characterized in that: A second outer protective layer is disposed below the second moisture-proof layer, and the second outer protective layer comprises a ribbed flame-retardant cloth.

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