A polyester fiber sound absorbing panel having high yield strength

Abstract

The utility model discloses a kind of polyester fiber sound absorption panels with high yield strength, including from outside to inside sequentially composite fixed upper surface layer polyester fiber board, the glass fiber composite transition layer with circular convex point, gradually-changing aperture composite honeycomb core, the glass fiber composite transition layer with circular convex point, lower surface layer polyester fiber board, and the edge of the upper surface layer polyester fiber board, lower surface layer polyester fiber board is fixed with the edge of gradually-changing aperture composite honeycomb core by integrated arc angle code overlock;For the problems of polyester fiber sound absorption panel in prior art, such as low yield strength, interlayer peeling, insufficient core support, and edge damage, the utility model aims to provide a polyester fiber sound absorption panel with high yield strength, by designing occlusal transition layer, using gradually-changing aperture to strengthen core layer and integrated edge protection, while ensuring sound absorption performance, significantly improving overall yield strength, interlayer connection stability and edge damage resistance.

Description

Technical Field

[0001] This utility model relates to the field of building decoration technology, specifically to a polyester fiber sound-absorbing board with high yield strength. Background Technology

[0002] Polyester fiber acoustic panels have been widely used in architectural acoustic decoration due to their advantages such as environmental friendliness, flame retardancy, good sound absorption, and simple construction. Traditional polyester fiber acoustic panels often use a single polyester fiber layer or a simple composite structure, such as a combination of a surface layer and a common core layer. Their design often focuses on sound absorption performance but neglects to improve the structural yield strength—specifically manifested in: The surface polyester fiberboard itself has weak tensile strength and resistance to local dents. During transportation or installation, it is prone to surface cracking due to collisions or deformation due to long-term load, which in turn affects the integrity of the sound absorption channel. Interlayer bonding often relies on a single adhesive and lacks a mechanical interlocking structure. When subjected to external impact, the surface layer and the core layer are prone to peeling due to concentrated shear force, which undermines the overall structural stability. The core layer often uses honeycomb or paper frames with equal pore size, and the central and edge areas are not differentiated in design, resulting in insufficient load-bearing capacity in the center or excessive compression of the sound absorption space at the edge; in addition, the core layer pore walls lack a reinforcing structure, and the radial compression resistance is weak, which can easily lead to core layer collapse after long-term use. Corner protection is mostly a split right-angle protection plate, which can only cover a part and is loosely connected to the main structure. The corners are prone to breakage due to stress concentration, which affects the overall service life.

[0003] Therefore, a polyester fiber sound-absorbing board that combines high yield strength and excellent sound absorption performance, with stable structure and reliable edge protection, was proposed and designed to meet the needs of high-load and long-term use scenarios. Utility Model Content

[0004] In view of the problems of low yield strength, easy peeling between layers, insufficient core layer support, and easy damage to edges and corners in existing polyester fiber sound-absorbing boards, the purpose of this utility model is to provide a polyester fiber sound-absorbing board with high yield strength. By designing an interlocking transition layer, using a gradient pore size to strengthen the core layer, and integrating edge and corner protection, the overall yield strength, interlayer connection stability, and edge and corner resistance are significantly improved while ensuring sound absorption performance.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows: A high yield strength polyester fiber sound-absorbing board includes an upper surface polyester fiber board, a glass fiber composite transition layer with circular protrusions, a gradient aperture composite honeycomb core, a glass fiber composite transition layer with circular protrusions, and a lower surface polyester fiber board, which are sequentially composited and fixed from the outside to the inside. The edges of the upper surface polyester fiber board and the lower surface polyester fiber board are fixed to the edges of the gradient aperture composite honeycomb core by an integrated arc-shaped corner bracket. Both the upper and lower polyester fiberboards are embedded with a layer of ultra-fine glass fiber mesh. Furthermore, the ultrafine fiberglass mesh has a warp and weft density of 30×30 threads / inch and a wire diameter of 0.08-0.1mm. The distance between the ultrafine fiberglass mesh and the outer surface of the surface polyester fiberboard is 0.5-1mm. The ultrafine fiberglass mesh can enhance the tensile and bending resistance of the surface layer and prevent the surface layer from cracking alone. Its distance from the outer surface is designed to prevent the fiberglass mesh from being exposed and affecting the appearance, while ensuring that the fiberglass mesh can bear the load in time when the surface layer is under stress.

[0006] The fiberglass composite transition layer with circular protrusions includes a fiberglass cloth substrate. Circular protrusions are integrally formed on both the upper and lower surfaces of the fiberglass cloth substrate. Fiberglass chopped strand mat is embedded in the circular protrusions. The circular protrusions correspond to and engage with the circular grooves on the inner side of the upper polyester fiberboard and the circular grooves on the surface of the gradient aperture composite honeycomb core, respectively. The engagement gap is filled with elastic epoxy resin. The gradient aperture composite honeycomb core is a glass fiber reinforced polypropylene integral molding structure. The honeycomb pore diameter in the central area is set to 5-6mm, and the honeycomb pore diameter in the edge area gradually increases to 8-10mm along the radial direction. Each honeycomb pore has 3-4 radial reinforcing ribs integrally molded on the inner wall along the radial direction. The honeycomb pores are filled with high-density polyester fiber sound-absorbing cotton, and the gap between the sound-absorbing cotton and the honeycomb pore wall is filled with epoxy resin. The four corners of the integrated arc-shaped corner bracket are integrally formed with arc-shaped corner brackets, and L-shaped buckles extend from the top of the arc-shaped corner brackets. The arc-shaped corner brackets are fixed to the sound-absorbing panel by self-tapping screws.

[0007] Furthermore, in the fiberglass composite transition layer with circular protrusions, the diameter of the circular protrusions is 0.3-0.5 mm, the height is 0.2-0.3 mm, and the spacing between adjacent circular protrusions is 2-3 mm; the length of the chopped fiberglass mat is 1-2 mm, and the filling amount is 5%-8% of the mass of the fiberglass cloth substrate. The interlocking of the circular protrusions and grooves can form a mechanical connection. Combined with elastic epoxy resin adhesive, the interlayer shear force is converted into extrusion force, which greatly improves the interlayer anti-peeling ability; the pre-embedded chopped fiberglass mat can enhance the fracture resistance of the circular protrusions and prevent the protrusions from falling off under stress.

[0008] Furthermore, the radial reinforcing ribs have a thickness of 0.2-0.3 mm and a length consistent with the radius of the honeycomb cells. The connection between the reinforcing ribs and the honeycomb cell walls is provided with rounded corners with a radius of 0.1-0.15 mm. The radial reinforcing ribs can uniformly transfer the force on the honeycomb cell walls radially, improving the radial compressive strength of the core layer. The rounded corner design can prevent stress concentration cracking at the connection between the reinforcing ribs and the cell walls, thus enhancing the structural stability of the core layer.

[0009] Furthermore, the arc of the arc-shaped corner bracket is R5-R8mm, the length of the L-shaped buckle is 3-4mm and the thickness is 0.8-1mm. The arc-shaped corner bracket can disperse the stress at the corner and avoid stress concentration in the right-angle structure. The L-shaped buckle can penetrate into the sound-absorbing panel to form a rigid connection. With the help of self-tapping screws, it can ensure that the edge banding is firmly fixed to the main structure and prevent the corner from falling off or breaking.

[0010] Furthermore, the density of the high-density polyester fiber sound-absorbing cotton is 35-40 kg / m³. 3 Furthermore, the surface of the sound-absorbing cotton is coated with a silane coupling agent coating with a thickness of 0.01-0.02mm. The high-density sound-absorbing cotton can ensure excellent sound absorption performance, and the silane coupling agent coating can enhance the bonding strength between the sound-absorbing cotton and the honeycomb pore wall, prevent the sound-absorbing cotton from shifting in the core layer, and at the same time improve the moisture resistance of the sound-absorbing cotton.

[0011] Furthermore, the thickness of the upper and lower polyester fiber boards is 3.5-4.5mm, the thickness of the gradient pore size composite honeycomb core is 12-14mm, the thickness of the glass fiber composite transition layer with circular protrusions is 0.4-0.6mm, and the thickness of the overall sound-absorbing panel is 19.4-23.6mm. The thickness design of each layer can balance the overall strength and lightweight requirements, and avoid affecting the ease of installation due to excessive thickness.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: (1) The fiberglass composite transition layer with circular protrusions adopts a dual connection structure of mechanical interlocking and elastic adhesive. The interlocking of the circular protrusions with the corresponding grooves forms a mechanical limit. Combined with the adhesive effect of the elastic epoxy resin, it can effectively disperse the interlayer shear force, avoid the peeling of the surface layer and the core layer due to external impact, and ensure the stability of the overall structure.

[0013] (2) The gradient aperture composite honeycomb core is designed with different apertures for different regions. The small aperture structure in the central region can enhance the load-bearing capacity of the stress concentration area, while the large aperture structure in the edge region can retain sufficient sound absorption space. The radial reinforcing ribs on the inner wall of the honeycomb can strengthen the support of the hole wall and prevent the core layer from collapsing after long-term use. The high-density polyester fiber sound-absorbing cotton filled in the honeycomb can ensure good sound absorption effect and meet acoustic requirements.

[0014] (3) The arc structure of the integrated arc corner bracket can disperse the stress at the corner and avoid the stress concentration problem that is easy to occur in the right angle structure; the L-shaped buckle of the arc corner bracket extends into the sound absorption panel to form a rigid connection. With the fixing effect of the self-tapping screw, it can ensure that the edge is firmly connected to the main structure, prevent the corner from falling off or breaking, and extend the overall service life of the sound absorption panel. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a front view of a polyester fiber sound-absorbing board with high yield strength according to an embodiment of the present utility model; Figure 2 This is a schematic diagram of a trapezoidal cross-sectional structure of a high-yield-strength polyester fiber sound-absorbing board according to an embodiment of the present utility model; Figure 3 This is one of the schematic diagrams showing the disassembled structure of a high-yield-strength polyester fiber sound-absorbing board according to an embodiment of the present utility model; Figure 4 This is the second schematic diagram showing the split structure of a high-yield-strength polyester fiber sound-absorbing board according to an embodiment of the present utility model.

[0017] Figure label: In the diagram: 1. Upper polyester fiberboard; 2. Fiberglass composite transition layer with circular protrusions; 3. Gradient aperture composite honeycomb core; 4. Lower polyester fiberboard; 5. Integrated arc-shaped corner bracket edging; 6. Fiberglass cloth substrate; 7. Circular protrusions; 8. Honeycomb holes; 9. Radial reinforcing ribs; 10. High-density polyester fiber sound-absorbing cotton; 11. Arc-shaped corner bracket; 12. L-shaped buckle; 13. Ultra-fine fiberglass mesh. Detailed Implementation

[0018] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0019] According to an embodiment of the present invention, a polyester fiber sound-absorbing board with high yield strength is provided.

[0020] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, a high-yield-strength polyester fiber sound-absorbing board according to an embodiment of this utility model comprises, from the outside to the inside: an upper surface polyester fiber board 1, the thickness of which is 4mm, and an ultra-fine glass fiber mesh 13 embedded inside; a glass fiber composite transition layer 2 with circular protrusions, the thickness of which is 0.5mm; a gradient aperture composite honeycomb core 3, the thickness of which is 13mm; a glass fiber composite transition layer 2 with circular protrusions, the thickness of which is 0.5mm; and a lower surface polyester fiber board 4, the thickness of which is 4mm, and an ultra-fine glass fiber mesh 13 also embedded inside; the overall thickness is 22mm. The edges of the upper surface polyester fiber board 1 and the lower surface polyester fiber board 4 are fixed to the edges of the gradient aperture composite honeycomb core 3 by an integrated arc-shaped corner bracket edging 5.

[0021] Among them, the ultra-fine glass fiber mesh 13 has a warp and weft density of 30×30 threads / inch, a wire diameter of 0.09mm, and a distance of 0.8mm from the outer surface of the corresponding surface polyester fiber board, which can enhance the tensile and bending resistance of the surface layer and prevent the surface layer from cracking alone.

[0022] The fiberglass composite transition layer 2 with circular protrusions includes a fiberglass cloth substrate 6. Circular protrusions 7 are integrally formed on the upper and lower surfaces of the fiberglass cloth substrate 6. The diameter of the circular protrusions 7 is 0.4 mm, the height is 0.25 mm, and the spacing between adjacent circular protrusions 7 is 2.5 mm. 1.5 mm long chopped fiberglass mat is pre-embedded in the circular protrusions 7, and the filling amount of the chopped fiberglass mat is 6% of the mass of the fiberglass cloth substrate 6. The circular protrusions 7 respectively engage with the circular grooves on the inner side of the upper polyester fiberboard 1 and the circular grooves on the surface of the gradient aperture composite honeycomb core 3, and the engagement gap is filled with elastic epoxy resin.

[0023] The gradient-aperture composite honeycomb core 3 is a one-piece molded structure of glass fiber reinforced polypropylene. The diameter of the honeycomb cells 8 in the central region is 5.5 mm, and the diameter of the honeycomb cells 8 in the edge region gradually increases to 9 mm along the radial direction. The inner wall of each honeycomb cell 8 has three radially integrally molded reinforcing ribs 9. The thickness of the radial reinforcing ribs 9 is 0.25 mm, and the length is consistent with the radius of the honeycomb cell 8. The connection between the radial reinforcing ribs 9 and the wall of the honeycomb cell 8 is rounded with a radius of 0.12 mm. The filling density inside the honeycomb cells 8 is 38 kg / m³. 3 The high-density polyester fiber sound-absorbing cotton 10 has a silane coupling agent coating with a thickness of 0.015mm sprayed on its surface, and the gap between the sound-absorbing cotton and the honeycomb hole 8 wall is filled with epoxy resin.

[0024] The four corners of the integrated arc-shaped corner bracket edging 5 are integrally formed with arc-shaped corner brackets 11, the arc of which is R6mm; an L-shaped latch 12 extends above the arc-shaped corner bracket 11, the length of which is 3.5mm and the thickness of which is 0.9mm; the arc-shaped corner bracket 11 is fixed to the sound-absorbing panel by self-tapping screws with a diameter of 2.5mm.

[0025] The polyester fiber sound-absorbing panel of this embodiment has flexural yield strength, compressive yield strength and interlaminar shear strength that can meet the requirements of high-load use scenarios. The sound absorption coefficient performs well in the 125-4000Hz frequency range and can be adapted to a variety of places with high requirements for strength and acoustic performance.

[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polyester fiber sound-absorbing board with high yield strength, characterized in that, The structure consists of an upper polyester fiber board (1), a glass fiber composite transition layer (2) with circular protrusions (7), a gradient aperture composite honeycomb core (3), a glass fiber composite transition layer (2) with circular protrusions (7), and a lower polyester fiber board (4) that are sequentially fixed from the outside to the inside. The edges of the upper polyester fiber board (1) and the lower polyester fiber board (4) are fixed to the four corners of the gradient aperture composite honeycomb core (3) by an integrated arc-shaped corner bracket (11) (5). The fiberglass composite transition layer (2) with circular protrusions (7) includes a fiberglass cloth substrate (6). The upper and lower surfaces of the fiberglass cloth substrate (6) are integrally formed with circular protrusions (7). Fiberglass chopped strand mat is embedded in the circular protrusions (7). The circular protrusions (7) are respectively engaged with the circular grooves on the inner side of the upper surface polyester fiber board (1) and the circular grooves on the surface of the gradient pore size composite honeycomb core (3). The engagement gap is filled with elastic epoxy resin. The gradient aperture composite honeycomb core (3) is a glass fiber reinforced polypropylene integral molding structure. The honeycomb hole (8) in the central area is set to 5-6 mm, and the honeycomb hole (8) in the edge area gradually increases to 8-10 mm in the radial direction. Each honeycomb hole (8) has 3-4 radial reinforcing ribs (9) integrally molded on the inner wall in the radial direction. The honeycomb hole (8) is filled with high-density polyester fiber sound-absorbing cotton (10). The integrated arc-shaped corner bracket (11) has an integrally formed arc-shaped corner bracket (11) at the four corners of the edge (5), and an L-shaped buckle (12) extends above the arc-shaped corner bracket (11).

2. The polyester fiber sound-absorbing board with high yield strength according to claim 1, characterized in that, The ultrafine glass fiber mesh (13) has a warp and weft density of 30×30 threads / inch, a wire diameter of 0.08-0.1mm, and the distance between the ultrafine glass fiber mesh (13) and the outer surface of the surface polyester fiber board is 0.5-1mm.

3. The polyester fiber sound-absorbing board with high yield strength according to claim 1, characterized in that, In the fiberglass composite transition layer (2) with circular protrusions (7), the diameter of the circular protrusions (7) is 0.3-0.5 mm, the height is 0.2-0.3 mm, and the spacing between adjacent circular protrusions (7) is 2-3 mm; the length of the fiberglass chopped strand mat is 1-2 mm, and the filling amount is 5%-8% of the mass of the fiberglass cloth substrate (6).

4. The polyester fiber sound-absorbing board with high yield strength according to claim 1, characterized in that, The radial reinforcing ribs (9) have a thickness of 0.2-0.3 mm and a length consistent with the radius of the honeycomb holes (8). The connection between the reinforcing ribs and the walls of the honeycomb holes (8) is provided with rounded corners with a radius of 0.1-0.15 mm.

5. The polyester fiber sound-absorbing board with high yield strength according to claim 1, characterized in that, The arc of the arc-shaped corner bracket (11) is R5-R8mm, the length of the L-shaped buckle (12) is 3-4mm and the thickness is 0.8-1mm. The arc-shaped corner bracket (11) is fixed to the sound-absorbing plate by self-tapping screws with a diameter of 2-3mm.

6. The polyester fiber sound-absorbing board with high yield strength according to claim 1, characterized in that, The density of the high-density polyester fiber sound-absorbing cotton (10) is 35-40 kg / m³. 3 Furthermore, the surface of the sound-absorbing cotton is coated with a silane coupling agent coating, the thickness of which is 0.01-0.02 mm. The gap between the sound-absorbing cotton and the wall of the honeycomb hole (8) is filled with epoxy resin.

7. The polyester fiber sound-absorbing board with high yield strength according to claim 1, characterized in that, The thickness of the upper surface polyester fiber board (1) and the lower surface polyester fiber board (4) is 3.5-4.5mm, the thickness of the gradient pore size composite honeycomb core (3) is 12-14mm, the thickness of the glass fiber composite transition layer (2) with circular protrusions (7) is 0.4-0.6mm, and the thickness of the overall sound-absorbing board is 19.4-23.6mm.

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