A composite warp-knitted spacer fabric padding structure and home furnishing article

Abstract

The utility model discloses a kind of composite warp-knitted spacer fabric filling structure and household products, it is related to textile material technical field.The composite warp-knitted spacer fabric filling structure includes: the upper layer warp-knitted spacer fabric and lower layer warp-knitted spacer fabric with multiple three-dimensional support structures formed by spacer yarn;Wherein, the three-dimensional support structure of upper layer warp-knitted spacer fabric and lower layer warp-knitted spacer fabric is configured to have different elastic deformation trends after being pressed.When the filling structure is subjected to external pressure, the three-dimensional support structure of upper layer and lower layer warp-knitted spacer fabric will simultaneously occur compression deformation, due to the different elastic deformation trends of both, its deformation mode and the direction of force of springback force generated thereby in horizontal direction are also different.These different direction horizontal forces can partially offset each other, thereby inhibiting the distortion or shear deformation of filling structure as a whole.The utility model solves the easily deformed problem caused by the strength difference of warp and weft of single-layer or simple double-layer structure.

Description

Technical Field

[0001] This utility model relates to the field of textile materials technology, and in particular to a composite warp-knitted spacer fabric filling structure and home furnishing products. Background Technology

[0002] Warp-knitted spacer fabric is a three-dimensional textile material consisting of two surface layers and spacer yarns connecting the two surface layers. This unique structure gives it excellent breathability, elasticity, and cushioning properties, making it widely used as a filling layer in home furnishing products such as mattresses, chairs, and cushions.

[0003] Existing warp-knitted spacer fabric filling structures are mainly single-layer warp-knitted spacer fabrics or simple double-layer warp-knitted spacer fabric composites. The inventors of this case have found that these structures still have defects in practical applications. Among them, single-layer structures have large overall elasticity and insufficient dimensional stability; at the same time, there is an inherent difference in tensile strength in the warp and weft directions. Under long-term stress (such as when a person lies down or sits), they are more likely to deform repeatedly along the weaker direction, and gradually lose elasticity based on this deformation, resulting in a situation where it is difficult to deform back to the original shape even after the external force is removed.

[0004] Regarding simple double-layer composite structures, the inventors discovered that each layer in a simple double-layer composite structure is generally a single-layer warp-knitted spacer fabric, and this simple double-layer composite structure is generally formed by directly stacking two single-layer warp-knitted spacer fabrics without any arrangement. Under long-term stress, such simple double-layer composite structures are also relatively prone to the aforementioned problem of "gradually losing elasticity, and even after the external force is removed, it is difficult to deform back to its original shape."

[0005] Furthermore, the inventors discovered that currently, in single-layer warp-knitted spacer fabrics or simple double-layer composite structures, pressure dispersion after compression is generally achieved by improving the three-dimensional structure of the single-layer warp-knitted spacer fabric itself, thereby improving durability, deformation resistance, structural stability, and other issues. No related technologies have been found that improve these issues through other methods. Utility Model Content

[0006] In view of this, the purpose of this utility model is to provide a novel warp-knitted spacer fabric filling structure, which can ensure the durability, deformation resistance and structural stability of the warp-knitted spacer fabric filling structure by means other than "improving the three-dimensional structure of the single-layer warp-knitted spacer fabric itself".

[0007] To address the above problems, the present invention proposes the following technical solutions: The upper warp-knitted spacer fabric has multiple three-dimensional support structures and includes spacer yarns, wherein the spacer yarns of the upper warp-knitted spacer fabric participate in forming the three-dimensional support structure of the upper warp-knitted spacer fabric. The lower warp-knitted spacer fabric has multiple three-dimensional support structures and includes spacer yarns, wherein the spacer yarns of the lower warp-knitted spacer fabric participate in forming the three-dimensional support structure of the lower warp-knitted spacer fabric. The upper warp-knitted spacer fabric and the lower warp-knitted spacer fabric are arranged sequentially; the lower warp-knitted spacer fabric is located on the side of the upper warp-knitted spacer fabric and is connected to the upper warp-knitted spacer fabric. The three-dimensional support structure of the upper warp-knitted spacer fabric is configured to have a first elastic deformation tendency after being compressed, and the three-dimensional support structure of the lower warp-knitted spacer fabric is configured to have a second elastic deformation tendency after being compressed; the first elastic deformation tendency is different from the second elastic deformation tendency, and is used to make the three-dimensional support structure of the upper warp-knitted spacer fabric and the three-dimensional support structure of the lower warp-knitted spacer fabric elastically deform in different directions.

[0008] Its further technical solution is, The spatial orientation of the three-dimensional support structure of the upper warp-knitted spacer fabric is different from that of the three-dimensional support structure of the lower warp-knitted spacer fabric. The spatial orientation refers to: the orientation of the opening structure on the three-dimensional support structure itself in three-dimensional space; and / or, the tilt angle of the three-dimensional support structure relative to the horizontal plane in three-dimensional space.

[0009] A further technical solution is that both the upper and lower warp-knitted spacer fabrics include two surface layers, and the spacer yarns of the three-dimensional support structure are connected between the two surface layers; the first elastic deformation tendency causes the three-dimensional support structure of the upper warp-knitted spacer fabric to generate a horizontal rebound force in a first direction after being compressed, and the second elastic deformation tendency causes the three-dimensional support structure of the lower warp-knitted spacer fabric to generate a horizontal rebound force in a second direction after being compressed, wherein the first direction and the second direction are different directions, and the horizontal rebound force is the rebound force in the horizontal direction component that occurs on the three-dimensional support structure.

[0010] A further technical solution is that the three-dimensional support structure of the upper warp-knitted spacer fabric is arc-shaped or X-shaped; the three-dimensional support structure of the lower warp-knitted spacer fabric is arc-shaped or X-shaped.

[0011] A further technical solution is that when both the three-dimensional support structure of the upper warp-knitted spacer fabric and the three-dimensional support structure of the lower warp-knitted spacer fabric are arc-shaped, the spacer yarns of the upper warp-knitted spacer fabric and the spacer yarns of the lower warp-knitted spacer fabric protrude in opposite directions, or they protrude in different but not opposite directions.

[0012] A further technical solution is that when both the three-dimensional support structure of the upper warp-knitted spacer fabric and the three-dimensional support structure of the lower warp-knitted spacer fabric are X-shaped, in the vertical direction, the intersection of the X-shapes is biased toward the upper or lower surface of the composite warp-knitted spacer fabric filling structure.

[0013] A further technical solution includes two identical and connected warp-knitted spacer fabrics, one of which serves as the upper warp-knitted spacer fabric and the other as the lower warp-knitted spacer fabric; the positional relationship of the two warp-knitted spacer fabrics is configured such that one of the two warp-knitted spacer fabrics, after being rotated horizontally by a set angle and its vertical height changed, can overlap with the other of the two warp-knitted spacer fabrics; the three-dimensional support structure of the upper and lower warp-knitted spacer fabrics can generate horizontal rebound forces in different directions.

[0014] A further technical solution is that the density of the spacer wires is 60-100 wires / cm². 2 The set angle is 40°-180°.

[0015] A further technical solution is that the surface layer is formed based on a braided structure, wherein the braided structure is at least one of a chain braid, a plain warp braid, a satin warp braid, a double warp braid, or a plain warp-chain braided composite structure.

[0016] A further technical solution includes an intermediate layer located between the upper warp-knitted spacer fabric and the lower warp-knitted spacer fabric. The upper warp-knitted spacer fabric, the intermediate layer, and the lower warp-knitted spacer fabric are arranged sequentially. The upper warp-knitted spacer fabric and the intermediate layer are bonded together, and the intermediate layer and the lower warp-knitted spacer fabric are bonded together. The upper and lower surfaces of the intermediate layer have microporous structures. The surface layers of the upper and lower warp-knitted spacer fabrics have mesh holes, and the pore size of the mesh holes is larger than the pore size of the microporous structure. The microporous structure is the pore structure of the intermediate layer, and the pore size of the pore structure is less than or equal to 100 micrometers.

[0017] A further technical solution includes an intermediate layer located between the upper warp-knitted spacer fabric and the lower warp-knitted spacer fabric. The upper warp-knitted spacer fabric, the intermediate layer, and the lower warp-knitted spacer fabric are arranged sequentially. The upper warp-knitted spacer fabric and the intermediate layer are bonded together, and the intermediate layer and the lower warp-knitted spacer fabric are bonded together. The material of the intermediate layer includes at least one of needle-punched cotton felt and non-woven fabric.

[0018] A further technical solution is that the basis weight of the intermediate layer is 100 g / m³. 2 -300g / m 2 The thickness is 1mm-3mm.

[0019] This utility model also provides a home furnishing product comprising a composite warp-knitted spacer fabric filling structure as described in any of the preceding claims.

[0020] Compared with the prior art, the technical effects achieved by the embodiments of this utility model include: The composite warp-knitted spacer fabric filling structure provided by this utility model includes: an upper warp-knitted spacer fabric having multiple three-dimensional support structures formed by spacer yarns; and a lower warp-knitted spacer fabric having multiple three-dimensional support structures formed by spacer yarns. The three-dimensional support structures of the upper warp-knitted spacer fabric are configured to have a first elastic deformation tendency after being compressed, and the three-dimensional support structures of the lower warp-knitted spacer fabric are configured to have a second elastic deformation tendency after being compressed. The first elastic deformation tendency and the second elastic deformation tendency are different. When the filling structure is subjected to external pressure, the three-dimensional support structures of the upper and lower warp-knitted spacer fabrics will undergo compression deformation simultaneously. Since the first elastic deformation tendency and the second elastic deformation tendency of the two are different, their deformation modes and the resulting rebound forces have different horizontal component directions. These horizontal component forces in different directions can partially cancel each other out, thereby effectively suppressing the collapse, twisting, or shear deformation of the filling structure as a whole. The composite warp-knitted spacer fabric filling structure of this invention solves the problem of easy deformation caused by the difference in tensile strength between warp and weft in single-layer or simple double-layer structures. It has good dimensional stability and overall structural retention ability, and is not prone to loosening or permanent deformation after long-term repeated pressure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0024] Figure 1 A schematic diagram of the composite warp-knitted spacer fabric filling structure provided in Example 1; Figure 2 for Figure 1 Enlarged version of section A; Figure 3 This is a photograph of the upper warp-knitted spacer fabric in Example 1; Figure 4 This is a photograph of the weave structure of the upper warp-knitted spacer fabric in Example 1; Figure 5 This is a schematic diagram of the composite warp-knitted spacer fabric filling structure provided in Example 2.

[0025] Figure Labels Upper layer warp-knitted spacer fabric 10, lower layer warp-knitted spacer fabric 20, middle layer 30, spacer yarn 11. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Similar component reference numerals in the drawings represent similar components. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0027] It should be understood that, when used in this specification and the appended claims, the terms "comprising" and "including" indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0028] It should also be understood that the terminology used in this specification of embodiments of the present invention is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the present invention. As used in this specification of embodiments of the present invention and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0029] Example 1 See Figure 1This is a schematic diagram of the composite warp-knitted spacer fabric filling structure (hereinafter referred to as the filling structure) provided in this embodiment. As shown in the figure, the composite warp-knitted spacer fabric filling structure provided in this embodiment includes an upper warp-knitted spacer fabric 10 and a lower warp-knitted spacer fabric 20 arranged sequentially, wherein the lower warp-knitted spacer fabric 20 is located on the side of the upper warp-knitted spacer fabric 10 and is connected to the upper warp-knitted spacer fabric 10. The three-dimensional support structures of the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 have different elastic deformation tendencies after being compressed (that is, the three-dimensional support structure of the upper warp-knitted spacer fabric 10 is configured to have a first elastic deformation tendency after being compressed, and the three-dimensional support structure of the lower warp-knitted spacer fabric 20 is configured to have a second elastic deformation tendency after being compressed; the first elastic deformation tendency is different from the second elastic deformation tendency, and is used to make the three-dimensional support structure of the upper warp-knitted spacer fabric 10 and the three-dimensional support structure of the lower warp-knitted spacer fabric 20 elastically deform in different directions).

[0030] Understandably, based on the difference between the first elastic deformation trend and the second elastic deformation trend, the above design can be understood as follows: the first elastic deformation trend causes the three-dimensional support structure of the upper warp-knitted spacer fabric 10 to generate a horizontal rebound force in the first direction after being compressed (the "horizontal rebound force" referred to in this utility model is the rebound force generated by the three-dimensional support structure in the horizontal direction), and the second elastic deformation trend causes the three-dimensional support structure of the lower warp-knitted spacer fabric 20 to generate a horizontal rebound force in the second direction after being compressed. The first direction and the second direction are different directions.

[0031] As can be seen from the above, due to different deformation trends, when the composite warp-knitted spacer fabric filling structure is subjected to vertical pressure (e.g., force from a user sitting or lying down), the three-dimensional support structures from the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 will generate horizontal rebound forces in different directions. These horizontal rebound forces pointing in different directions (from the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20, respectively) will restrain and cancel each other out, like two opposing springs working together, thereby effectively suppressing the overall deformation of the aforementioned filling structure (e.g., lateral slippage, twisting, or "collapse" deformation) and dispersing the pressure; furthermore, the structural deformation... The reduction in deformation means that more elastic potential energy is used to provide vertical rebound support, rather than being consumed by ineffective lateral deformation. Therefore, the composite warp-knitted spacer fabric filling structure provided in this embodiment exhibits better support performance and, compared to single-layer and simple double-layer warp-knitted spacer fabrics in related technologies, improves the problem of "gradually losing elasticity, and difficulty in deforming back to its original shape even after the external force is removed." The filling structure of this embodiment effectively delays fatigue failure, allowing the composite warp-knitted spacer fabric filling structure to maintain good morphological stability and mechanical properties even after long-term repeated pressure, ensuring its service life. More specifically, as long as the deformation trend, rebound force direction, and rebound deformation direction of the upper and lower three-dimensional support structures are not completely consistent under pressure, thus always generating horizontal components in different directions, these horizontal components (from the upper and lower three-dimensional support structures respectively) can mutually cancel and restrain each other to a certain extent, achieving good pressure dispersion.

[0032] For example, such as Figure 2 As shown, the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 are bonded together with an adhesive and cured by a hot-pressing composite process. In this embodiment, the upper warp-knitted spacer fabric 10 has multiple three-dimensional support structures, each of which has an open structure and protrudes to the left (i.e., a flat "C"-shaped arc). The lower warp-knitted spacer fabric 20 has multiple three-dimensional support structures, each of which has an open structure and protrudes to the right (i.e., a flat "C"-shaped arc). Therefore, it can be understood that when the three-dimensional support structures of the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 are compressed, they can generate horizontal rebound forces in different directions.

[0033] Please see further. Figure 3 In this embodiment, the upper warp-knitted spacer fabric 10 includes spacer yarns 11, which participate in the formation of the three-dimensional support structure of the upper warp-knitted spacer fabric 10; the lower warp-knitted spacer fabric 20 includes spacer yarns 11, which participate in the formation of the three-dimensional support structure of the upper warp-knitted spacer fabric 10.

[0034] In this embodiment, the lower warp-knitted spacer fabric 20 is obtained by rotating the same warp-knitted spacer fabric as the upper warp-knitted spacer fabric 10 by 180°. This allows the three-dimensional support structure of the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 to generate horizontal rebound forces in different directions. That is, the protrusion directions of the upper and lower three-dimensional support structures are completely opposite, thereby generating horizontal rebound forces in completely opposite directions when compressed. This effectively suppresses the lateral slippage, twisting or shear deformation of the filling structure as a whole and effectively disperses the pressure.

[0035] See Figure 4 In this embodiment, both the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 include two surface layers formed based on a weave structure, each surface layer having a mesh formed by the weave structure. In both the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20, spacer yarns 11 are connected between the two surface layers; the weave structure is configured to maintain the morphological stability of the three-dimensional support structure.

[0036] Furthermore, the "three-dimensional support structure" mentioned above is actually a three-dimensional structure formed by the spacer yarn 11, connecting the upper and lower surface layers of the warp-knitted spacer fabric. Its core function is to provide elastic recovery force when the filling structure is under pressure, and to generate a corresponding mechanical response during the deformation of the filling structure and after the external force disappears.

[0037] As described above, in this embodiment, the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 are produced using the same raw materials and weaving process. To obtain the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20, a warp-knitted spacer fabric can be produced first. This fabric uses 150D polyester low-elasticity yarn as its raw material and is woven on a double-needle bed warp knitting machine using a warp-flat-knitted chain composite structure. The thickness is set to 10mm, and the density of the spacer yarn 11 is 80 threads / cm². 2 Under this process, the spacer yarns 11 of the warp-knitted spacer fabric produced are formed as follows: Figure 1-3 The arc-shaped three-dimensional support structure shown has its protruding direction (i.e., bending direction) determined by the loop-forming mechanism and warp feed configuration of the knitting machine, all pointing in one direction (e.g., all pointing towards the operating side of the machine, considered as "protruding to the right"). Given that those skilled in the art are fully capable of producing the upper warp-knitted spacer fabric 10 of this embodiment based on the above description and common knowledge in the field, other production parameters that can be flexibly adjusted during production are not elaborated here.

[0038] In this embodiment, one piece of the aforementioned warp-knitted spacer fabric is taken as the upper warp-knitted spacer fabric 10, and another identical piece of warp-knitted spacer fabric is taken and rotated 180° in a plane to become the lower warp-knitted spacer fabric 20. After this rotation, the protruding direction of the spacer yarns 11 of the upper warp-knitted spacer fabric 10 is exactly opposite to that of the spacer yarns 11 of the lower warp-knitted spacer fabric 20; after rotating one of the two warp-knitted spacer fabrics horizontally by 180° and changing its height vertically, it can almost overlap with the other of the two warp-knitted spacer fabrics. In this embodiment, hot melt adhesive is applied to the contact surfaces of the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20, and they are bonded using a hot-pressing composite process to obtain the composite warp-knitted spacer fabric filling structure of this embodiment. In this embodiment, the amount of adhesive applied is 15g / m². 2 The hot pressing temperature is 120℃ and the pressure is 0.4MPa.

[0039] As can be seen from the above, this embodiment cleverly achieves a unique composite warp-knitted spacer fabric filling structure by rotating the warp-knitted spacer fabric by 180°, thus making the arc-shaped spacer yarns 11 of the upper and lower layers of fabric protrude in opposite directions. When subjected to vertical pressure, the arc-shaped structures formed by the upper and lower layers of fabric in opposite directions will generate deformation tendencies and rebound forces in opposite directions. These forces restrain each other, cancel each other out, and disperse the pressure, just like two opposing springs working together, thereby effectively suppressing the lateral slippage, twisting, or "collapse" deformation of the filling structure as a whole, and greatly improving the dimensional stability of the structure.

[0040] Understandably, by arranging the spacer yarns 11 in opposite directions, this embodiment achieves complementary mechanical support, resulting in structural stability far superior to that of a single-layer warp-knitted spacer fabric and a simple double-layer structure. Furthermore, the filling structure of this embodiment has the advantages of simple structure and ease of production and assembly. More specifically, as described above, the upper and lower warp-knitted spacer fabrics can be produced uniformly, and the core structural design can be achieved simply through subsequent rotation operations, without the need to adjust complex weaving processes, resulting in low production costs and high efficiency.

[0041] It should be noted that the "spatial orientation" referred to in this utility model actually refers to the orientation of the opening structure in three-dimensional space of the three-dimensional support structure (such as X-shaped or the aforementioned arc-shaped structure); and / or the tilt angle of the three-dimensional support structure relative to the horizontal plane in three-dimensional space. Thus, it can also be understood that, regardless of the specific form of the three-dimensional support structure, the core design of this embodiment is to make the spatial orientation of the three-dimensional support structure in the upper and lower warp-knitted spacer fabrics (such as the "top" direction, opening direction of the arc-shaped three-dimensional support structure, or the main axis direction of the X-shaped three-dimensional support structure) change relatively and be different from each other.

[0042] In other words, given that any non-vertical and elastically deformable three-dimensional support structure naturally generates a horizontal expansion force (i.e., horizontal rebound force) during compressive deformation under load, in this invention, because the spatial orientations of the upper and lower three-dimensional support structures are different, the directions of these horizontal forces are also different, thus forming a mutually restrictive and mutually canceling mechanical effect between layers, thereby improving the overall structural stability. For example, as mentioned above, it is obvious that using... Figure 2 When the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 are made into a mattress, the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 will generate horizontal rebound forces in completely opposite directions when compressed.

[0043] Understandably, provided that the three-dimensional support structure of the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 can generate horizontal resilience in different directions, generally speaking, the design of the three-dimensional support structure of either the upper warp-knitted spacer fabric 10 or the lower warp-knitted spacer fabric 20 can adopt one of the following schemes: 1. Arc-shaped; for example Figure 3 As shown, the spacer wire 11 connects the upper and lower surface layers with a smooth arc, resembling an arch bridge, protruding to the right. It should be noted that the specific shape of the arc can be a part of a circle or ellipse, a parabola, an asymmetrical arc, or an arch; the arc structure encompasses all objects with arc shapes. This structure can efficiently convert vertical pressure into tension along the arc, providing excellent vertical cushioning and rebound.

[0044] II. X-shape; The X-shape shown is formed by two or more spacer wires 11 intersecting at the middle position, forming a stable structure similar to a space truss.

[0045] It should be noted that the intersection point of the X-shaped structure is designable, and the intersection point can be biased towards the upper or lower surface of the composite warp-knitted spacer fabric filling structure in the vertical direction. When the intersection point is biased towards a certain surface layer, the X-shaped structure will have an asymmetrical structure with unequal lengths of the upper and lower "arch arms". This makes the composite warp-knitted spacer fabric filling structure of this invention exhibit different stiffnesses in the long and short arms when subjected to pressure, thereby achieving differentiated support and more complex horizontal forces.

[0046] It should also be noted that in related technologies, there are already three-dimensional support structures for single-layer warp-knitted spacer fabrics that adopt the aforementioned X-shaped structure. Therefore, this case will not provide a more detailed description of the aforementioned X-shaped structure.

[0047] Third, in other embodiments, the three-dimensional support structure can also be a V-shape or other three-dimensional configurations that can provide stable spatial support. Similarly, existing three-dimensional support structures for single-layer warp-knitted spacer fabrics have adopted the aforementioned V-shaped structure, therefore, this application will not describe the aforementioned V-shaped structure in more detail.

[0048] In this invention, the composite warp-knitted spacer fabric filling structure employs a three-dimensional support structure with different schemes. When pressure is applied to the fabric surface, the arc-shaped or X-shaped three-dimensional structure undergoes elastic bending or compression deformation, absorbing and storing energy. After the pressure is removed, the three-dimensional support structure recovers its original shape due to the elasticity of its material, releasing the stored energy and thus providing rebound force, achieving vertical buffering and dynamic support. Furthermore, due to its inclined or curved geometric features, it exhibits a tendency to expand or contract laterally, thereby triggering a horizontal rebound force. This invention configures the three-dimensional support structures of the upper and lower warp-knitted spacer fabrics with different spatial orientations (for example, by rotating to make the spatial orientations of the three-dimensional support structures of the upper and lower warp-knitted spacer fabrics different), making the directions of these horizontal forces different. These horizontal forces in different directions mutually restrain and partially cancel each other out between layers, thereby effectively suppressing the lateral slippage, stretching, or twisting of the overall filling structure, significantly improving dimensional stability and shear deformation resistance.

[0049] Furthermore, this embodiment achieves this by rotating the lower warp-knitted spacer fabric 20 relative to the upper warp-knitted spacer fabric 10 by a set angle in the plane, enabling the upper and lower warp-knitted spacer fabrics to generate a mutually restraining mechanical effect when subjected to force. Therefore, different angles can be selected to achieve the best synergistic effect in different application scenarios. For example, in other embodiments, the 180° rotation angle in this embodiment can also be changed to other non-orthogonal angles such as 45°, 90°, and 120°. Of course, if it is necessary to adapt to the overall shape of the mattress, it is possible that additional processing of the upper warp-knitted spacer fabric 10 or the lower warp-knitted spacer fabric 20 is required—for example, the upper warp-knitted spacer fabric 10 can be obtained first, and then a warp-knitted spacer fabric of equivalent size to the upper warp-knitted spacer fabric 10 can be taken, rotated, and then cut to the same size as the upper warp-knitted spacer fabric 10 to obtain the lower warp-knitted spacer fabric 20.

[0050] Understandably, in warp-knitted spacer fabrics, the density of spacer yarns 11 can be adjusted according to the required support stiffness and breathability, with a preferred range of 60 yarns / cm. 2 Up to 100 roots / cm 2 Between (e.g., 60 strands / cm) 2 100 strands / cm 2 The higher the density value, the more support points there are, and the stiffer the structure; the lower the density value, the softer the structure and the better the breathability. Of course, the above preferred range is not a necessary limitation, and the specific density selection of the three-dimensional support structure can be flexibly designed by those skilled in the art according to their needs.

[0051] Understandably, in other embodiments, the weaving structure constituting the surface layer of the warp-knitted spacer fabric is not limited to a warp-plain-chain composite structure. Those skilled in the art can select other basic warp-knitting structures or combinations thereof, such as but not limited to chain weaves, warp-plain weaves, warp-satin weaves, or double-warp weaves, depending on specific requirements for surface stability, stretchability, and unraveling. These structures can all form a stable mesh structure to fix and maintain the shape of the three-dimensional support structure.

[0052] Optionally, the thickness of the upper warp-knitted spacer fabric 10 and / or the lower warp-knitted spacer fabric 20 is 5mm-20mm. Understandably, the thickness of the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 can be independently designed according to the softness and hardness requirements of the final product, and its range can be between 5mm and 20mm. For example, thicker fabrics (such as 12mm, 15mm, 18mm, 20mm) can be used for layers requiring stronger cushioning, while thinner fabrics (such as 5mm, 8mm, 10mm) can be used for layers requiring stronger support. Of course, the above preferred ranges are not mandatory limitations and can be flexibly designed by those skilled in the art as needed.

[0053] In other embodiments, the raw materials of the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 are not limited to polyester or nylon low-elastic yarn, but can also be other types of synthetic fiber filaments, such as polypropylene (PP), elastic fiber (spandex covered yarn) or their blended yarns, depending on actual performance requirements.

[0054] Example 2 Regarding the double-layer composite structure, the inventors discovered that during actual production, because the surface layers of both the upper and lower warp-knitted spacer fabrics have a mesh-like woven structure, the adhesive easily seeps through the mesh into the spacer yarns during the lamination process, failing to remain sufficiently at the interlayer interface to form effective adhesion. Furthermore, the inventors found that in related technologies, the warp-knitted spacer fabric filling structure of simple double-layer composite structures also suffers from weak interlayer bonding. Weak interlayer bonding undoubtedly affects the supporting performance, which is one of the reasons why simple double-layer composite structures are prone to collapse under pressure, and whose deformation resistance and structural durability need improvement.

[0055] To address the aforementioned issues in a targeted manner, see [link to relevant documentation]. Figure 5 The composite warp-knitted spacer fabric filling structure provided in this embodiment, based on embodiment 1, further includes an intermediate layer 30 located between the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20. The upper warp-knitted spacer fabric 10, the intermediate layer 30, and the lower warp-knitted spacer fabric 20 are arranged sequentially, with the upper warp-knitted spacer fabric 10 and the intermediate layer 30 bonded together, and the intermediate layer 30 bonded together with the lower warp-knitted spacer fabric 20.

[0056] In this embodiment, the upper and lower surfaces of the intermediate layer 30 have microporous structures. These microporous structures refer to the pore structures of the intermediate layer 30 (e.g., its upper and lower surfaces), with pore sizes on the micrometer scale, typically less than or equal to 100 micrometers. In contrast, the surface layer of the warp-knitted spacer fabric, formed by a woven structure, has a mesh structure, with pores formed by yarn loops, and pore sizes typically on the millimeter scale (e.g., 0.5 mm to several millimeters), much larger than the pore sizes of the microporous structures.

[0057] Understandably, the microporous structure of the upper and lower surfaces of the intermediate layer 30 means that the intermediate layer 30 has a relatively dense surface (warp-knitted spacer fabric), high density, and considerable tensile modulus. The intermediate layer 30, embedded between the upper and lower warp-knitted spacer fabrics, undoubtedly enhances the overall structural bending stiffness and planar stability. Simultaneously, the intermediate layer 30 can more evenly transfer the point load from the upper warp-knitted spacer fabric 10 to the lower warp-knitted spacer fabric 20, further dispersing pressure and avoiding stress concentration. Furthermore, because the upper and lower surfaces of the intermediate layer 30 have a microporous structure with extremely small pore sizes, the presence of the intermediate layer 30 can effectively prevent excessive leakage of adhesive through the mesh of the upper or lower warp-knitted spacer fabric during hot pressing, forcing the adhesive to be confined as much as possible between the layers, thus improving interlayer bonding strength. Therefore, the design of the intermediate layer 30 in this embodiment can improve the problem of "weak interlayer bonding strength in the simple double-layer composite structure filled with warp-knitted spacer fabric."

[0058] Furthermore, as a key reinforcing and functional layer, the intermediate layer 30 can have its material composition and process parameters widely selected and adjusted according to the performance requirements of the final product. Optionally, the intermediate layer 30 can also be made of other common nonwoven materials such as needle-punched cotton felt and / or nonwoven fabric.

[0059] Specifically, for needle-punched cotton felt, synthetic staple fibers such as polyester, polypropylene, and nylon, or natural fibers such as cotton and wool, can be used. The needle-punching process causes the fibers to entangle, forming a stable two-dimensional network structure. The needle-punching density can range from 20 needles / cm². 2 Up to 40 stitches / cm 2 Between these ranges. Higher needle-punching density results in tighter fiber entanglement, a more robust intermediate layer structure, and stronger tensile strength and anti-delamination ability. Fiber fineness can be selected between 1.5D and 5D, and fiber length can be adjusted between 32mm and 55mm. For example, polyester staple fibers with a length of 38mm-51mm and a fineness of 1.5D-3D, and polypropylene staple fibers with a length of 32mm-45mm and a fineness of 2D-4D.

[0060] For nonwoven or non-woven materials, options include spunlace nonwovens, thermally bonded nonwovens, chemically bonded nonwovens, meltblown nonwovens, breathable microporous polymer films (such as PE, TPU), high-density foam sheets, or bio-based materials (such as polylactic acid PLA nonwovens).

[0061] As mentioned above, the basis weight (area density) of the intermediate layer 30 is a key parameter affecting its performance. Its range can be 100 g / m³. 2 Up to 300 g / m 2 When the weight is low (e.g., 100-150 g / m³), 2 The intermediate layer focuses on providing an effective bonding interface and preventing glue penetration, while maintaining the overall lightweight and flexibility of the structure; at higher basis weights (e.g., 150-300 g / m²), 2 The middle layer 30 mainly plays a significant role in rigidity enhancement and strong support.

[0062] The thickness of the interlayer 30 can be adjusted between 1 mm and 3 mm, but understandably, this is not a necessary limitation. It should be noted that the thickness, basis weight, and needle density of the interlayer 30 should be designed collaboratively according to requirements. For example, a thick interlayer with high basis weight but loose (low density) and a thin interlayer with medium basis weight but high density may give the composite structure different support feel and mechanical properties.

[0063] In this embodiment, the intermediate layer 30 has a weight of 120g / m². 2 The needle density is 30 needles / cm². 2 A 2mm thick polyester staple fiber needle-punched cotton felt, with polyester staple fibers of 40mm ± 2mm length and 2.0D fineness, is subjected to hot air setting at 140℃ for 5 minutes to achieve morphological stability. The parameters and settings of the upper warp-knitted spacer fabric 10 and the lower warp-knitted spacer fabric 20 are the same as in Example 1, and the lower warp-knitted spacer fabric 20 is also rotated 180° relative to the upper warp-knitted spacer fabric 10. During bonding, polyolefin hot melt adhesive is coated on the lower surface of the upper warp-knitted spacer fabric 10, the upper and lower surfaces of the needle-punched cotton felt, and the upper surface of the lower warp-knitted spacer fabric 20, with a coating amount of 15g / m². 2 Subsequently, the layers are bonded together using a hot press laminating machine at 125°C and 0.4MPa pressure to ensure that the interlayer bonding strength is not less than 18N / 2.5cm.

[0064] Example 3 The composite warp-knitted spacer fabric filling structure provided in this embodiment is an optimization of the upper and lower warp-knitted spacer fabrics based on Embodiment 2. Its three-dimensional support structure is X-shaped, formed by the intersection of spacer yarns 11. For the upper warp-knitted spacer fabric 10, the intersection point of the X-shape is significantly biased towards the upper surface layer of the upper warp-knitted spacer fabric 10 in the vertical direction, with the X-shaped opening facing upward to the left. For the lower warp-knitted spacer fabric 20, the intersection point of the X-shape is significantly biased towards the lower surface layer of the lower warp-knitted spacer fabric 20 in the vertical direction. After rotating 180°, the X-shaped opening of the lower warp-knitted spacer fabric 20 faces upward to the right. The middle layer 30 uses a weight of 150 g / m². 2 The polypropylene nonwoven fabric. The remaining bonding processes, parameters, and settings are similar to those in Example 2.

[0065] This embodiment utilizes an X-shaped intersection offset design to form an asymmetrical arch arm, enabling the X-shaped structure to more effectively disperse the load laterally and generate more complex multi-directional horizontal forces when subjected to vertical pressure. The staggered arrangement of the opening directions of the upper and lower X-shaped structures makes the interaction of these multi-directional horizontal forces more complete and complex, providing better stability.

[0066] Example 4 The composite warp-knitted spacer fabric filling structure provided in this embodiment, based on Embodiment 1, demonstrates another method for manufacturing upper and lower warp-knitted spacer fabrics.

[0067] Specifically: First, the upper warp-knitted spacer fabric 10 is produced using a set of process parameters, causing its spacer yarns 11 to form an arc shape bulging to the left. Then, by adjusting the machine's loop-forming mechanism or warp feed, the lower warp-knitted spacer fabric 20 is produced, causing its spacer yarns 11 to form an arc shape bulging to the right. At this point, the lower warp-knitted spacer fabric 20 is directly aligned with the upper warp-knitted spacer fabric 10 (without rotation) and hot-pressed together, thus achieving a composite warp-knitted spacer fabric filling structure where the spacer yarns 11 of the upper and lower warp-knitted spacer fabrics bulge in opposite directions.

[0068] The bonding process is the same as in Example 1.

[0069] The principle of this embodiment is exactly the same as that of Embodiment 1. Its advantage lies in providing another manufacturing flexibility: it can be achieved either through rotation in the finishing stage (as in Embodiment 1) or directly customized in the weaving stage. This has positive implications for integrated production line planning.

[0070] Comparative Example 1 This comparative example provides a warp-knitted spacer fabric filling structure, specifically, it contains only an upper warp-knitted spacer fabric 10. The upper warp-knitted spacer fabric 10 of this comparative example has the same raw materials and production parameters as the upper warp-knitted spacer fabric 10 of Example 1.

[0071] Comparative Example 2 This comparative example provides a simple double-layer composite structure of warp-knitted spacer fabric. Specifically, it is obtained by aligning and hot-pressing two sequentially stacked upper warp-knitted spacer fabrics 10 (the spatial orientation of the three-dimensional support structure of the two upper warp-knitted spacer fabrics is the same). The upper warp-knitted spacer fabric 10 of this comparative example has the same raw materials and production parameters as the upper warp-knitted spacer fabric 10 of Example 1.

[0072] Comparative Example 3 This comparative example provides a composite warp-knitted spacer fabric filling structure, which, based on Comparative Example 2, is obtained by sequentially aligning and hot-pressing an upper warp-knitted spacer fabric, an intermediate layer, and an upper warp-knitted spacer fabric. The raw materials and parameters of the intermediate layer in this comparative example are exactly the same as those of the intermediate layer in Example 2. The raw materials and parameters of the upper warp-knitted spacer fabric in this comparative example are exactly the same as those of the upper warp-knitted spacer fabric in Comparative Example 2.

[0073] The performance of the composite warp-knitted spacer fabric filling structures in Example 2 and Comparative Examples 1-3 was tested below. The tensile strength at break of the fabric was determined according to GB / T 24218.3-2010 Textiles - Nonwovens - Test Methods - Part 3: Determination of breaking strength and elongation at break. The thickness loss after repeated indentation fatigue under constant load was determined according to QB / T 2819-2006 Determination of long-term fatigue properties of flexible foam materials. The results are shown in Table 1.

[0074] Table 1 Performance Test Results The results in Table 1 show that Comparative Example 1 is the performance benchmark for a single-layer warp-knitted spacer fabric structure, while Comparative Example 2 is a simple superposition of the structures in Comparative Example 1. The tensile strength of Comparative Example 2 is higher than that of Comparative Example 1, mainly due to the simple superposition effect. However, its thickness loss after repeated compression fatigue under constant load is ≤10%, indicating that both Comparative Example 1 and Comparative Example 2 are prone to significant permanent compression deformation (i.e., "collapse") under long-term repeated pressure. The results of Comparative Example 2 demonstrate that simply adding a layer of warp-knitted spacer fabric without changing the mechanical relationship of the structure cannot improve fatigue resistance.

[0075] Comparative Example 3, with the addition of an intermediate layer compared to Comparative Example 2, exhibits improved tensile strength. This is primarily attributed to the contribution of the intermediate layer (needle-punched cotton felt). The high tensile strength of the intermediate layer itself significantly enhances the overall structure. Furthermore, due to the rigid support of the intermediate layer, Comparative Example 3 shows a thickness loss of ≤8% after repeated compression fatigue under constant load, an improvement over Comparative Example 2. However, the improvement is limited because the spacer fibers in the upper and lower layers are oriented in the same direction, resulting in a consistent deformation trend under pressure. This fails to effectively suppress overall lateral expansion and the resulting structural instability, and also fails to effectively distribute pressure.

[0076] Example 2 demonstrates excellent overall tensile properties (warp ≥ 500 N / 5 cm, weft ≥ 490 N / 5 cm). It exhibits the highest strength, and the thickness loss after repeated compression fatigue under constant load is ≤ 5%. This proves that the design of the spacer yarn structure in the upper and lower warp-knitted spacer fabrics of this invention effectively disperses pressure, achieves complementary strength in the warp and weft directions, and solves the potential weakness in a single direction, resulting in a product with balanced and high-strength stability in all directions. Simultaneously, the middle layer provides rigid support in the vertical direction, resisting compression, and together with the upper and lower warp-knitted spacer fabrics, forms a very stable structural system. Therefore, after withstanding repeated impacts and pressure, it can maintain its initial thickness and shape to the maximum extent, avoiding common collapse problems.

[0077] This utility model embodiment also provides a mattress product. The core layer of the mattress includes a three-layer composite warp-knitted spacer fabric filling structure as described in Embodiment 2.

[0078] Similar to the application of the filling structure of this utility model in mattress products, the filling structure of this utility model can also be used as part of at least one of the following home furnishing products: backrest, lumbar pillow, pillow, and seat cushion.

[0079] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0080] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0081] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0082] 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 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.

[0083] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0084] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. The illustrative expressions of the above terms in this specification should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0085] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Since these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

[0086] The above description describes specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. A composite warp-knitted spacer fabric filling structure, characterized in that, include: The upper warp-knitted spacer fabric has multiple three-dimensional support structures and includes spacer yarns, wherein the spacer yarns of the upper warp-knitted spacer fabric participate in forming the three-dimensional support structure of the upper warp-knitted spacer fabric. The lower warp-knitted spacer fabric has multiple three-dimensional support structures and includes spacer yarns, wherein the spacer yarns of the lower warp-knitted spacer fabric participate in forming the three-dimensional support structure of the lower warp-knitted spacer fabric. The upper warp-knitted spacer fabric and the lower warp-knitted spacer fabric are arranged sequentially; the lower warp-knitted spacer fabric is located on the side of the upper warp-knitted spacer fabric and is connected to the upper warp-knitted spacer fabric. The three-dimensional support structure of the upper warp-knitted spacer fabric is configured to have a first elastic deformation tendency after being compressed, and the three-dimensional support structure of the lower warp-knitted spacer fabric is configured to have a second elastic deformation tendency after being compressed. The first elastic deformation trend is different from the second elastic deformation trend, and is used to make the three-dimensional support structure of the upper warp-knitted spacer fabric and the three-dimensional support structure of the lower warp-knitted spacer fabric elastically deform in different directions.

2. The composite warp-knitted spacer fabric filling structure according to claim 1, characterized in that, The spatial orientation of the three-dimensional support structure of the upper warp-knitted spacer fabric is different from that of the three-dimensional support structure of the lower warp-knitted spacer fabric. The spatial orientation refers to: the orientation of the opening structure on the three-dimensional support structure itself in three-dimensional space; and / or, the tilt angle of the three-dimensional support structure relative to the horizontal plane in three-dimensional space.

3. The composite warp-knitted spacer fabric filling structure according to claim 1, characterized in that, Both the upper and lower warp-knitted spacer fabrics include two surface layers, and the spacer yarns of the three-dimensional support structure are connected between the two surface layers. The first elastic deformation tendency causes the three-dimensional support structure of the upper warp-knitted spacer fabric to generate a horizontal rebound force in a first direction after being compressed, and the second elastic deformation tendency causes the three-dimensional support structure of the lower warp-knitted spacer fabric to generate a horizontal rebound force in a second direction after being compressed. The first direction and the second direction are different directions, and the horizontal rebound force is the rebound force in the horizontal direction component that occurs on the three-dimensional support structure.

4. The composite warp-knitted spacer fabric filling structure according to claim 2, characterized in that, The upper warp-knitted spacer fabric has a three-dimensional support structure that is arc-shaped or X-shaped; the lower warp-knitted spacer fabric has a three-dimensional support structure that is arc-shaped or X-shaped.

5. The composite warp-knitted spacer fabric filling structure according to claim 4, characterized in that, When both the three-dimensional support structure of the upper warp-knitted spacer fabric and the three-dimensional support structure of the lower warp-knitted spacer fabric are arc-shaped, the spacer yarns of the upper warp-knitted spacer fabric and the spacer yarns of the lower warp-knitted spacer fabric protrude in opposite directions, or they protrude in different but not opposite directions.

6. The composite warp-knitted spacer fabric filling structure according to claim 4, characterized in that, When both the three-dimensional support structure of the upper warp-knitted spacer fabric and the three-dimensional support structure of the lower warp-knitted spacer fabric are X-shaped, in the vertical direction, the intersection of the X-shapes is biased toward the upper or lower surface of the composite warp-knitted spacer fabric filling structure.

7. The composite warp-knitted spacer fabric filling structure according to claim 1, characterized in that, It includes two identical and connected warp-knitted spacer fabrics, one of which serves as the upper warp-knitted spacer fabric and the other as the lower warp-knitted spacer fabric; the positional relationship of the two warp-knitted spacer fabrics is configured such that one of the two warp-knitted spacer fabrics can overlap with the other of the two warp-knitted spacer fabrics after being rotated horizontally by a set angle and its vertical height changed; the three-dimensional support structure of the upper and lower warp-knitted spacer fabrics can generate horizontal rebound forces in different directions.

8. The composite warp-knitted spacer fabric filling structure according to claim 7, characterized in that, The density of the spacer wires is 60-100 wires / cm². 2 The set angle is 40°-180°.

9. The composite warp-knitted spacer fabric filling structure according to claim 3, characterized in that, The surface layer is formed based on a woven structure, which is at least one of chain braiding, warp plain weave, warp satin weave, double warp weave, and warp plain-chain braiding composite weave.

10. The composite warp-knitted spacer fabric filling structure according to any one of claims 1-9, characterized in that, It also includes an intermediate layer located between the upper warp-knitted spacer fabric and the lower warp-knitted spacer fabric, wherein the upper warp-knitted spacer fabric, the intermediate layer, and the lower warp-knitted spacer fabric are arranged sequentially, the upper warp-knitted spacer fabric and the intermediate layer are bonded together, and the intermediate layer and the lower warp-knitted spacer fabric are bonded together; the upper and lower surfaces of the intermediate layer have microporous structures; the surface layers of the upper and lower warp-knitted spacer fabrics have mesh holes, the pore size of which is larger than the pore size of the microporous structure; the microporous structure is the pore structure of the intermediate layer, and the pore size of the pore structure is less than or equal to 100 micrometers.

11. The composite warp-knitted spacer fabric filling structure according to claim 1, characterized in that, It also includes an intermediate layer located between the upper warp-knitted spacer fabric and the lower warp-knitted spacer fabric, wherein the upper warp-knitted spacer fabric, the intermediate layer and the lower warp-knitted spacer fabric are arranged sequentially, the upper warp-knitted spacer fabric and the intermediate layer are bonded together, and the intermediate layer and the lower warp-knitted spacer fabric are bonded together; the material of the intermediate layer includes at least one of needle-punched cotton felt and non-woven fabric.

12. The composite warp-knitted spacer fabric filling structure according to claim 10, characterized in that, The weight of the intermediate layer is 100 g / m³. 2 -300g / m 2 The thickness is 1mm-3mm.

13. A household product, characterized in that, It includes the composite warp-knitted spacer fabric filling structure as described in any one of claims 1-12.

Images