Lightweight flame-retardant sound-absorbing functional composite material and product thereof

Abstract

The utility model provides a light flame-retardant sound-absorbing functional composite material and a product thereof. The light flame-retardant sound-absorbing functional composite material comprises PET (polyethylene terephthalate) non-woven fabric, and PET melt-blown cotton is arranged on the inner layer of the PET non-woven fabric. The PET short fiber is of a net-shaped structure; and the PET plastic particles penetrate through the net-shaped structure from the side surface of the net-shaped structure of the PET short fibers through high-speed spraying by a melt-blowing process. The PET non-woven fabric serves as an outer layer material to provide structural stability and protection. The PET short fibers provide a porous structure and a fiber network, scattering of sound waves and mutual winding of the PET melt-blown fibers and the PET short fibers are facilitated, and the density and the sound absorption effect of the melt-blown cotton are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sound-absorbing cotton, and in particular to a lightweight, flame-retardant, sound-absorbing functional composite material and a product thereof. Background Art

[0002] With the development of intelligent fuel vehicles and new energy vehicles, the medium and low frequency electromagnetic noise generated by core components such as drive motors, high-voltage components, and circuit control systems has become an important source of noise inside the car, and a new demand has been put forward for automotive polymer sound-absorbing materials to simultaneously absorb medium and low frequency noise. However, the pore size of the conventionally used polyurethane foam material is similar to the wavelength of high-frequency sound waves, making it good at absorbing high-frequency sound, but poor at absorbing medium and low frequency sound.

[0003] In the prior art, CN205272770U discloses a car hood sound-absorbing and heat-insulating cotton, including a cotton body, the cotton body including a melt-blown cotton layer and an upper non-woven fabric layer and a lower non-woven fabric layer located on the upper and lower surfaces thereof, respectively, and the melt-blown cotton layer is melt-blown by mixing PP and PET materials. However, the sound-absorbing cotton made of a mixture of PET+PP melt-blown fibers cannot be used for a long time in places with higher temperatures such as the engine compartment and the roof due to the high temperature resistance of PP. In addition, when these two materials are combined, the noise reduction requirements for medium and low frequency noise reduction cannot be achieved.

[0004] Therefore, there is an urgent need for a lightweight, flame-retardant, sound-absorbing functional composite material and its products to solve the technical problems in the prior art that the composite material cannot be used for a long time in places with higher temperatures such as the engine compartment and the roof and cannot meet the noise reduction requirements for mid- and low-frequency noise reduction. Utility Model Content

[0005] In view of this, the utility model proposes a lightweight, flame-retardant, sound-absorbing functional composite material and its products, aiming to solve the technical problems in the prior art that the composite material cannot be used for a long time in places with higher temperatures such as the engine compartment and the roof and cannot meet the noise reduction requirements for mid- and low-frequency noise reduction.

[0006] On the one hand, the utility model provides a lightweight, flame-retardant, sound-absorbing functional composite material, comprising:

[0007] PET non-woven fabric, wherein the inner layer of the PET non-woven fabric is provided with PET melt-blown cotton.

[0008] Preferably, the thickness ratio of the PET non-woven fabric to the PET melt-blown cotton is 4:13.

[0009] Preferably, the PET meltblown cotton comprises:

[0010] PET short fibers are arranged into a mesh structure;

[0011] The PET plastic particles are sprayed from the side of the mesh structure of the PET staple fibers at high speed through a melt-blowing process and penetrate into the mesh structure.

[0012] Preferably, the PET meltblown cotton further comprises:

[0013] PET melt-blown fiber, one end of the PET melt-blown fiber is ejected from the PET plastic particles, and the other end of the PET melt-blown fiber is entangled with the PET short fiber.

[0014] Compared with the prior art, the beneficial effect is that the PET non-woven fabric as the outer layer material has the characteristics of light weight and flame retardancy, and is used to provide structural stability and protection. The PET melt-blown cotton is arranged in the inner layer of the PET non-woven fabric, which includes PET staple fibers and PET melt-blown fibers.

[0015] The PET short fibers are arranged into a mesh structure, providing a porous structure and a fiber network, which is conducive to the scattering and absorption of sound waves. The PET plastic particles are sprayed at high speed through the melt-blown process and penetrated into the mesh structure to form the internal structure of the melt-blown cotton.

[0016] One end of the PET meltblown fiber is ejected from the PET plastic particles, and the other end is entangled with the PET short fibers, which increases the density and sound absorption effect of the meltblown cotton.

[0017] When sound waves pass through PET meltblown cotton, they will cause the fibers and internal particles in the material to move relative to each other, resulting in the conversion of sound energy into heat energy, thereby reducing the energy of the sound waves; and the porous structure and irregular shape of the PET meltblown cotton can cause the sound waves to reflect and scatter multiple times, causing the energy of the sound waves to gradually disperse and attenuate; and the pores and fibers in the PET meltblown cotton can cause the sound waves to rub against the air when passing through the material, thereby gradually dissipating the energy of the sound waves. In addition, the fibers in the PET meltblown cotton can absorb the energy of the sound waves through vibration, converting the sound wave energy into vibration energy inside the material, thereby reducing the reflection and propagation of the sound waves. In addition, by setting up PET meltblown cotton, the overall density can be reduced, thereby reducing the mass and achieving the requirements of lightweight.

[0018] On the other hand, the utility model also provides a lightweight, flame-retardant, sound-absorbing functional product, including a lightweight, flame-retardant, sound-absorbing functional composite material, and also including:

[0019] T-side;

[0020] The L surface is arranged outside the left wide side of the T surface, the wide side of the L surface is connected to the left wide side of the T surface, the T surface and the L surface are of equal width, and the length ratio of the T surface to the L surface is 27:20.

[0021] Preferably, it also includes:

[0022] An F surface is arranged on one side of the long side of the T surface, the long side of the F surface is connected to the long side of the T surface, and the T surface and the F surface are equal in width and length;

[0023] A first side insert, arranged on the outer sides of the two wide sides of the F surface;

[0024] A second side insert, arranged on one side of the outer long side of the F surface;

[0025] The second positioning hole is arranged on the second side inserting piece.

[0026] Preferably, it also includes:

[0027] A B surface is arranged outside the right wide side of the L surface and connected to the side surface of the L surface. The B surface is equal in width and length to the L surface.

[0028] The B surface is provided with a first positioning hole, and the first positioning hole coincides with the second positioning hole in terms of spatial structure.

[0029] Preferably, it also includes:

[0030] The first R surface is arranged outside the right wide side of the B surface,

[0031] A first notch is arranged at the upper left corner of the first R surface;

[0032] A first mounting hole is arranged below the first notch.

[0033] Preferably, it also includes:

[0034] A second R surface, arranged outside the left wide side of the B surface;

[0035] A second notch is arranged at the upper right corner of the second R surface;

[0036] The second mounting hole is arranged below the second notch, and the second mounting hole matches the second mounting hole in terms of spatial structure.

[0037] Compared with the prior art, the beneficial effect lies in that the lightweight, flame-retardant sound-absorbing functional product of the utility model is used for the battery pack sound insulation pad. By using the lightweight, flame-retardant sound-absorbing functional composite material of the utility model, it has the same beneficial effect as the sound-absorbing functional composite material of the present application, which will not be repeated here. In addition, it has certain technical effects in reducing noise in the automobile engine compartment. By reducing the spread of noise and absorbing the energy of noise, the comfort and quietness in the car can be improved.

[0038] Furthermore, the technical solution of the present application provides a lightweight sound-absorbing composite material, which achieves the technical effect of reducing the weight of the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0040] Figure 1 A cross-sectional view of a lightweight, flame-retardant, sound-absorbing functional composite material provided by an embodiment of the utility model;

[0041] Figure 2 A cross-sectional view of a lightweight, flame-retardant, sound-absorbing functional composite material provided by an embodiment of the utility model;

[0042] Figure 3 A top view of a lightweight, flame-retardant, sound-absorbing functional composite material provided by an embodiment of the utility model;

[0043] Figure 4 A schematic structural diagram of a lightweight, flame-retardant, sound-absorbing functional composite product provided by an embodiment of the utility model.

[0044] In the figure: 1. PET non-woven fabric; 2. PET melt-blown cotton; 21. PET staple fiber; 22. PET plastic particles; 23. PET melt-blown fiber; 3. Automobile acoustic component; 31. T surface; 32. B surface; 321. First positioning hole; 33. L surface; 34. First R surface; 341. First notch; 342. First mounting hole; 35. Second R surface; 351. Second notch; 352. Second mounting hole; 36. F surface; 361. First side insert; 362. Second side insert; 363. Second positioning hole. DETAILED DESCRIPTION

[0045] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 the present application.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0049] The lightweight, flame-retardant, sound-absorbing functional composite material of this embodiment is obtained by the following process:

[0050] The PET short fibers 21 are opened and broken up, combed into a very fluffy state through a mechanical web-forming process, and laid flat on a web-forming conveyor line;

[0051] The PET plastic particles 22 are heated to a high temperature and ejected through a spinneret to form extremely fine filamentary fibers, namely, PET melt-blown fibers;

[0052] The PET staple fibers 21 and the PET meltblown fibers are mixed and conveyed through a roller press to form a roll, which is then cut into sheets according to product size requirements;

[0053] The PET nonwoven fabric 1 + the formed PET cotton sheet is placed in a heated mold and pressure-maintained for forming.

[0054] See also Figure 1-3 As shown, this embodiment provides a lightweight, flame-retardant, sound-absorbing functional composite material, comprising:

[0055] PET non-woven fabric 1 and PET melt-blown cotton 2, wherein the inner layer of the PET non-woven fabric 1 is provided with the PET melt-blown cotton 2.

[0056] In some embodiments of the present application, the thickness ratio of the PET non-woven fabric 1 and the PET melt-blown cotton 2 is 4:13.

[0057] Specifically, according to the information you provided, the thickness ratio of PET non-woven fabric 1 and PET meltblown cotton 2 is 4:13.

[0058] By adding PET meltblown cotton 2, the ratio is 13, the density and sound absorption effect of the sound absorbing material can be increased. PET meltblown cotton 2 has a porous structure and a fiber network, and increasing its thickness can increase the number of fibers and the interaction between fibers, thereby improving the sound absorption ability.

[0059] Meanwhile, the PET nonwoven fabric 1 as the outer layer material with a ratio of 4 can provide structural stability and protection while reducing the weight of the overall product.

[0060] Understandably, weight reduction is an important design consideration, particularly in areas such as automotive, to reduce the overall weight of a vehicle and improve fuel efficiency and performance.

[0061] In summary, by relatively increasing the thickness of the PET meltblown cotton 2, a better sound absorption effect can be achieved, and by using a relatively thin PET non-woven fabric 1, the purpose of reducing weight can be achieved. This design may produce better technical effects in practical applications, but the specific effects still need to be verified through experiments and tests based on actual conditions.

[0062] In some embodiments of the present application, the PET meltblown cotton 2 comprises:

[0063] PET short fibers 21 are arranged in a mesh structure;

[0064] The PET plastic particles 22 are sprayed from the side of the mesh structure of the PET staple fibers 21 at high speed through a melt-blowing process and are disposed in the mesh structure.

[0065] In some embodiments of the present application, the PET meltblown cotton 2 further includes:

[0066] PET melt-blown fiber, one end of the PET melt-blown fiber is ejected from the PET plastic particle 22 , and the other end of the PET melt-blown fiber is entangled with the PET short fiber 21 .

[0067] Compared with the prior art, the beneficial effect of this embodiment is that the PET non-woven fabric 1 as the outer layer material has the characteristics of light weight and flame retardancy, and is used to provide structural stability and protection. The PET melt-blown cotton 2 is arranged in the inner layer of the PET non-woven fabric 1, which includes PET staple fibers 21 and PET melt-blown fibers.

[0068] The PET short fibers 21 are arranged in a mesh structure, providing a porous structure and a fiber network, which is conducive to the scattering and absorption of sound waves. The PET plastic particles 22 are sprayed at high speed through the mesh structure by a melt-blown process to form the internal structure of the melt-blown cotton.

[0069] One end of the PET meltblown fiber is ejected from the PET plastic particle 22, and the other end is entangled with the PET short fiber 21, thereby increasing the density and sound absorption effect of the meltblown cotton.

[0070] When sound waves pass through the PET meltblown cotton 2, they will cause the fibers and internal particles in the material to move relative to each other, resulting in the conversion of sound energy into heat energy, thereby reducing the energy of the sound waves; and the porous structure and irregular shape in the PET meltblown cotton 2 can cause the sound waves to reflect and scatter multiple times, so that the energy of the sound waves is gradually dispersed and attenuated; and the pores and fibers in the PET meltblown cotton 2 can cause the sound waves to rub against the air when passing through the material, so that the energy of the sound waves is gradually dissipated. In addition, the fibers in the PET meltblown cotton 2 can absorb the energy of the sound waves through vibration, so that the sound wave energy is converted into vibration energy inside the material, thereby reducing the reflection and propagation of the sound waves. In addition, by setting up the PET meltblown cotton 2, the overall density can be reduced, thereby reducing the mass and meeting the requirements of lightweight.

[0071] See also Figure 4 As shown, this embodiment also provides a lightweight, flame-retardant, sound-absorbing functional product, including a lightweight, flame-retardant, sound-absorbing functional composite material, including:

[0072] T surface 31;

[0073] The L surface 33 is arranged outside the left wide side of the T surface 31. The wide side of the L surface 33 is connected to the left wide side of the T surface 31. The T surface 31 and the L surface 33 have the same width. The length ratio of the T surface 31 to the L surface 33 is 27:20.

[0074] Specifically, the automotive acoustic component 3 of the lightweight, flame-retardant, sound-absorbing functional product of this embodiment includes a battery pack sound insulation pad, which, taking the AA cross section as an example, includes the PET non-woven fabric 1 and the PET meltblown cotton 2 provided in this embodiment.

[0075] In some embodiments of the present application, the sound-absorbing functional article further includes:

[0076] The F surface 36 is disposed on one side of the long side of the T surface 31, the long side of the F surface 36 is connected to the long side of the T surface 31, and the T surface 31 and the F surface 36 are equal in width and length;

[0077] A first side insert 361, arranged on the outer sides of the two wide sides of the F surface 36;

[0078] A second side insert 362, provided on one side of the outer long side of the F surface 36;

[0079] The second positioning hole 363 is provided on the second side inserting piece 362 .

[0080] In some embodiments of the present application, the sound-absorbing functional article further includes:

[0081] The B surface 32 is arranged outside the right wide side of the L surface 33 and connected to the side surface of the L surface 33. The B surface 32 and the L surface 33 have the same width and length;

[0082] A first positioning hole 321 is provided on the B surface 32 , and the first positioning hole 321 coincides with the second positioning hole 363 in terms of spatial structure.

[0083] Specifically, this embodiment uses a method of folding a plane figure into a spatial structure, and forms a three-dimensional structure with specific functions and shapes by folding and connecting the plane figure in a certain way. In this process, specific holes and gaps can be used to install and connect different parts or components.

[0084] It can be understood that the first positioning hole 321 is set on the B surface 32, and the second positioning hole 363 is set on another component or assembly. When the spatial structure is assembled, the position of the first positioning hole 321 coincides with the position of the second positioning hole 363, so that the two components or assemblies can be aligned in the correct position; this design method can provide a more accurate and stable assembly method to ensure the correct connection and positioning between the various components or assemblies of the spatial structure. By matching the positioning holes, the stability and functionality of the overall structure can be guaranteed.

[0085] In some embodiments of the present application, the sound-absorbing functional article further includes:

[0086] The first R surface 34 is arranged outside the right wide side of the B surface 32.

[0087] A first notch 341 is provided at the upper left corner of the first R surface 34;

[0088] A first mounting hole 342 is disposed below the first notch 341 .

[0089] In some embodiments of the present application, the sound-absorbing functional article further includes:

[0090] A second R surface 35 is arranged outside the left wide side of the B surface 32;

[0091] A second notch 351 is provided at the upper right corner of the second R surface 35;

[0092] The second mounting hole 352 is disposed below the second notch 351 , and the second mounting hole 352 coincides with the second mounting hole 352 in terms of spatial structure.

[0093] Specifically, this embodiment uses a method of folding a plane figure into a spatial structure, and forms a three-dimensional structure with specific functions and shapes by folding and connecting the plane figure in a certain way. In this process, specific holes and gaps can be used to install and connect different parts or components.

[0094] The second notch 351 is a notch on the second R surface 35, and the second mounting hole 352 is a hole below the second notch 351. When the plane figure is folded into a spatial structure, the position of the second mounting hole 352 coincides with the position of the second notch 351, which means that the corresponding parts or components can be connected and installed through this hole; this design method can provide a more compact and effective installation and connection method, making the assembly of the spatial structure more convenient and stable. At the same time, by matching the positions of the hole and the notch, it can ensure that the installed parts or components are coordinated with other parts of the spatial structure, achieving the stability and functionality of the overall structure.

[0095] Compared with the prior art, the beneficial effect is that the lightweight, flame-retardant sound-absorbing functional product of this embodiment is used for the battery pack sound insulation pad. By using the lightweight, flame-retardant sound-absorbing functional composite material of this embodiment, it has the same beneficial effect as the sound-absorbing functional composite material of the present application, which will not be repeated here. In addition, it has certain technical effects in reducing noise in the automobile engine compartment. By reducing the spread of noise and absorbing the energy of noise, the comfort and quietness in the car can be improved.

[0096] Furthermore, the technical solution of the present application provides a lightweight sound-absorbing composite material, which achieves the technical effect of reducing the weight of the vehicle body.

[0097] Those skilled in the art can understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lightweight, flame-retardant, sound-absorbing functional composite material, characterized in that: include: PET non-woven fabric, wherein the inner layer of the PET non-woven fabric is provided with PET melt-blown cotton.

2. The lightweight, flame-retardant, sound-absorbing functional composite material according to claim 1, characterized in that: The thickness ratio of the PET non-woven fabric to the PET melt-blown cotton is 4:

13.

3. The lightweight, flame-retardant, sound-absorbing functional composite material according to claim 1, characterized in that: The PET melt-blown cotton comprises: PET short fibers are arranged into a mesh structure; The PET plastic particles are sprayed from the side of the mesh structure of the PET staple fibers at high speed through a melt-blowing process and penetrate into the mesh structure.

4. The lightweight, flame-retardant, sound-absorbing functional composite material according to claim 3, characterized in that: The PET meltblown cotton also includes: PET melt-blown fiber, one end of the PET melt-blown fiber is ejected from the PET plastic particles, and the other end of the PET melt-blown fiber is entangled with the PET short fiber.

5. A lightweight, flame-retardant, sound-absorbing functional product, characterized in that: The lightweight, flame-retardant, sound-absorbing functional composite material according to any one of claims 1 to 4 further comprises: T-side; The L surface is arranged outside the left wide side of the T surface, the wide side of the L surface is connected to the left wide side of the T surface, the T surface and the L surface are of equal width, and the length ratio of the T surface to the L surface is 27:

20.

6. The lightweight, flame-retardant, sound-absorbing functional product according to claim 5, characterized in that: Also includes: An F surface is arranged on one side of the long side of the T surface, the long side of the F surface is connected to the long side of the T surface, and the T surface and the F surface are equal in width and length; A first side insert, arranged on the outer sides of the two wide sides of the F surface; A second side insert, arranged on one side of the outer long side of the F surface; The second positioning hole is arranged on the second side inserting piece.

7. The lightweight, flame-retardant, sound-absorbing functional product according to claim 6, characterized in that: Also includes: A B surface is arranged outside the right wide side of the L surface and connected to the side surface of the L surface. The B surface is equal in width and length to the L surface. The B surface is provided with a first positioning hole, and the first positioning hole coincides with the second positioning hole in terms of spatial structure.

8. The lightweight, flame-retardant, sound-absorbing functional product according to claim 7, characterized in that: Also includes: The first R surface is arranged outside the right wide side of the B surface, A first notch is arranged at the upper left corner of the first R surface; A first mounting hole is arranged below the first notch.

9. The lightweight, flame-retardant, sound-absorbing functional product according to claim 8, characterized in that: Also includes: A second R surface, arranged outside the left wide side of the B surface; A second notch is arranged at the upper right corner of the second R surface; The second mounting hole is arranged below the second notch, and the second mounting hole matches the second mounting hole in terms of spatial structure.

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