Broadband non-woven material with high sound absorption performance as well as preparation method and application of broadband non-woven material

Abstract

The invention belongs to the technical field of sound absorption materials, and discloses a broadband non-woven material with high sound absorption performance and a preparation method and application thereof. The non-woven material comprises four layers of structures from top to bottom, the first layer is a spun-bonded non-woven fabric A, the second layer is a nanofiber membrane, the third layer is a melt-blown non-woven fabric, and the fourth layer is a spun-bonded non-woven fabric B; a plurality of grooves are formed in the side, facing the melt-blown non-woven fabric, of the spunbond non-woven fabric B, and a cavity structure is formed between the grooves and the melt-blown non-woven fabric; the spunbond non-woven fabric A is prepared from the following raw materials: a main material, an elastic material and a low-melting-point polymer; the preparation raw materials of the nanofiber membrane comprise PP and PET fragments. The preparation raw materials of the melt-blown non-woven fabric comprise PP; and the preparation raw materials of the spunbond non-woven fabric B are the same as the preparation raw materials of the spunbond non-woven fabric A. The non-woven material has an excellent sound absorption effect, can absorb sound in a wide frequency band range, and is light and thin in whole material, simple in preparation process and suitable for industrial production.

Description

Technical Field

[0001] This invention belongs to the field of sound-absorbing materials technology, and specifically relates to a nonwoven material with wideband high sound absorption performance, its preparation method and application. Background Technology

[0002] Acoustic environment is an essential part of people's daily life. However, with the rapid development of industries such as industry and automobiles worldwide, the quality of acoustic environment is declining. Long-lasting and high-intensity environmental noise seriously harms people's physical and mental health.

[0003] Currently, there are three main methods for noise control: (1) noise source control; (2) noise reduction control along the propagation path; and (3) protection of the noise receiver. Among these, noise reduction control along the propagation path is the most commonly used and most effective method.

[0004] Nonwoven sound-absorbing materials are widely used in automotive interiors, high-speed rail carriages, and architectural acoustics. Existing technologies mainly employ: 1. Gradient density design, for example, patent CN105172275A discloses a full-band sound-absorbing needle-punched nonwoven composite structure material, which is a single material system and lacks a sound-absorbing structure for low frequencies; 2. Nano-modification, for example, in the literature (Yang Qian, Zhang Ruquan. Preparation and performance of automotive sound-absorbing nonwoven materials. Shanghai Textile Technology, 2020, 48(5):29-32.), sound absorption performance is improved by adding reduced graphene oxide, but the addition of nanoparticles increases costs and complicates the process. These solutions have drawbacks such as narrow sound absorption bandwidth and complex processes.

[0005] Therefore, developing a sound-absorbing material with a wide sound absorption bandwidth and good sound absorption effect has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention provides a nonwoven material with wide-bandwidth high sound absorption performance, its preparation method and application. This nonwoven material has excellent sound absorption effect, can absorb sound in a wide frequency range, and is lightweight and thin overall, with a simple preparation process suitable for industrial production.

[0007] In a first aspect, the present invention provides a nonwoven material comprising a four-layer structure from top to bottom, wherein the first layer is a spunbond nonwoven fabric A, the second layer is a nanofiber membrane, the third layer is a meltblown nonwoven fabric, and the fourth layer is a spunbond nonwoven fabric B; the spunbond nonwoven fabric B has a plurality of grooves on the side facing the meltblown nonwoven fabric, and the grooves form a cavity structure with the meltblown nonwoven fabric; The raw materials for preparing the spunbond nonwoven fabric A include a main material, an elastic material, and a low-melting-point polymer; the main material includes PP (polypropylene) and / or PET (polyethylene terephthalate); the elastic material includes at least one of SEBS (styrene-ethylene-butene-styrene block copolymer), PU (polyurethane), TPU (thermoplastic polyurethane), and POE (polyolefin elastomer); and the low-melting-point polymer includes at least one of low-melting-point PE (polyethylene), low-melting-point EVA (ethylene-vinyl acetate copolymer), and low-melting-point PET. The raw materials for preparing the nanofiber membrane include PP and PET fragments; The raw materials for preparing the meltblown nonwoven fabric include PP; The raw materials used to prepare the spunbond nonwoven fabric B are the same as those used to prepare the spunbond nonwoven fabric A.

[0008] Specifically, the raw materials for preparing the spunbond nonwoven fabric A of this invention include three materials with different heat shrinkage: a main material, an elastic material, and a low-melting-point polymer. During the preparation of spunbond nonwoven fabric A, the elastic material curls, causing the remaining fibers to shrink and curl, forming a fluffy spunbond nonwoven fabric A. The spunbond nonwoven fabric A has a high porosity, which, as a sound wave incident layer, facilitates efficient sound wave incidence and better dissipates high-frequency sound waves.

[0009] Specifically, the raw materials for preparing the nanofiber membrane of the present invention contain PET fragments. The surface of the PET fragments is rough and the edges are irregular. During the preparation of the nanofiber membrane, by controlling the spinning temperature, the surface of the PET fragments can be softened while the core remains solid, thereby making the surface of the nanofiber membrane irregularly protruding and the membrane surface rougher, which is beneficial for absorbing mid-to-high frequency sound.

[0010] Specifically, the fourth layer of spunbond nonwoven fabric B in this invention forms a cavity structure with the third layer of meltblown nonwoven fabric through the grooves on it. This cavity structure can be used as a cavity resonance sound absorption structure, which can better dissipate low-frequency sound waves.

[0011] In some embodiments of the present invention, the raw materials for preparing the spunbond nonwoven fabric A, by weight, include 60-70 parts of main material, 10-20 parts of elastic material, and 15-25 parts of low-melting-point polymer.

[0012] In some embodiments of the present invention, the melting point of the low-melting-point polymer is 110~140°C.

[0013] In some embodiments of the present invention, the porosity of the spunbond nonwoven fabric A is 75% to 80%.

[0014] In some embodiments of the present invention, the diameter of the PET fragment is 80~200μm.

[0015] In some embodiments of the present invention, the raw materials for preparing the nanofiber membrane also include compatibilizers and antioxidants.

[0016] In some embodiments of the present invention, the raw materials for preparing the nanofiber membrane include 60-80 parts of PP, 20-30 parts of PET fragments, 1-5 parts of compatibilizer, and 0.1-1 parts of antioxidant, by mass percentage.

[0017] In some embodiments of the present invention, the compatibilizer includes at least one of maleic anhydride-grafted polypropylene, acrylic acid-grafted polypropylene, and maleic anhydride-grafted ethylene-octene copolymer.

[0018] In some embodiments of the present invention, the antioxidant is at least one of antioxidant 1010, antioxidant 1076, and antioxidant 626.

[0019] In some embodiments of the present invention, the basis weight of the spunbond nonwoven fabric A is 50~60 gsm.

[0020] In some embodiments of the present invention, the thickness of the spunbond nonwoven fabric A is 3~3.5mm.

[0021] In some embodiments of the present invention, the basis weight of the nanofiber membrane is 8-12 gsm.

[0022] In some embodiments of the present invention, the thickness of the nanofiber membrane is 0.1~0.2 mm.

[0023] In some embodiments of the present invention, the basis weight of the meltblown nonwoven fabric is 60-80 gsm.

[0024] In some embodiments of the present invention, the fiber fineness of the meltblown nonwoven fabric is 3.5~4.5μm.

[0025] In some embodiments of the present invention, the thickness of the meltblown nonwoven fabric is 0.6~3mm.

[0026] In some embodiments of the present invention, the basis weight of the spunbond nonwoven fabric B is 50~60 gsm.

[0027] In some embodiments of the present invention, the thickness of the spunbond nonwoven fabric B is 3~3.5mm.

[0028] In some embodiments of the present invention, the basis weight of the nonwoven material is 168~212 gsm.

[0029] In some embodiments of the present invention, the thickness of the nonwoven material is 6-9 mm.

[0030] A second aspect of the present invention provides a method for preparing the nonwoven material described in the first aspect of the present invention, comprising the following steps: The raw materials for preparing the spunbond nonwoven fabric A are melt-extruded, spun into a web, and then thermally bonded between two light rollers to obtain the spunbond nonwoven fabric A. The meltblown nonwoven fabric is prepared by using melt electrospinning to prepare the nanofiber membrane on the surface of the meltblown nonwoven fabric. The raw materials for preparing the spunbond nonwoven fabric B are melt-extruded, spun into a web, and then thermally bonded between a patterned roller and a smooth roller to obtain the spunbond nonwoven fabric B with multiple grooves; the surface of the patterned roller has multiple protrusions. The spunbond nonwoven fabric A, nanofiber membrane, meltblown nonwoven fabric and spunbond nonwoven fabric B are stacked from top to bottom and then bonded by hot rolling to obtain the nonwoven material.

[0031] In some embodiments of the present invention, the specific process of melt extrusion in the preparation of the spunbond nonwoven fabric A includes: adding the main material, elastic material and low-melting-point polymer into three hoppers respectively, and melt extruding them separately using three screws, wherein the screw temperature of the main material is 180~240℃, the screw temperature of the elastic material is 150~200℃, the screw temperature of the low-melting-point polymer is 110~160℃, and the die temperature is 180~220℃.

[0032] In some embodiments of the present invention, during the preparation of the spunbond nonwoven fabric A, the temperature of the hot rolling mill used for the hot rolling bonding is 80~105℃ and the pressure is 1~3Mpa.

[0033] In some embodiments of the present invention, the spinning temperature of the melt electrospinning method is 220~230°C. Under this spinning temperature condition, the surface of the PET fragments can be softened while the core remains solid, resulting in irregular protrusions on the surface of the nanofiber membrane, making the membrane surface rougher and thus beneficial for absorbing mid-to-high frequency sound.

[0034] In some embodiments of the present invention, the spinning voltage of the melt electrospinning method is 50~75KV.

[0035] In some embodiments of the present invention, the spinning distance of the melt electrospinning method is 5-8 cm.

[0036] In some embodiments of the present invention, the height of the protrusions on the surface of the flower roller is 4-6 mm.

[0037] In some embodiments of the present invention, the heat melt ratio of the patterned roller is 5% to 10%. Specifically, the heat melt ratio of the present invention refers to the percentage of the area of ​​the protrusions on the patterned roller to the total area of ​​the patterned roller.

[0038] In some embodiments of the present invention, the spunbond nonwoven fabric A, the nanofiber membrane, the meltblown nonwoven fabric and the spunbond nonwoven fabric B are stacked sequentially from top to bottom, and then hot-rolled and bonded under the conditions of hot-pressing temperature of 105~130℃ and hot-pressing pressure of 0.5~2.5Mpa to obtain the nonwoven material.

[0039] A third aspect of the present invention provides the application of the nonwoven material described in the first aspect of the present invention in the field of sound insulation.

[0040] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention relates to a broadband, high-sound-absorbing nonwoven material comprising four layers from top to bottom. The first layer is spunbond nonwoven fabric A (which allows sound waves to penetrate more easily, and its high porosity facilitates the dissipation of high-frequency sound waves). The second layer is a nanofiber membrane (PP with added PET fragments, resulting in a rougher membrane surface that effectively dissipates mid-to-high-frequency sound waves). The third layer, meltblown nonwoven fabric, and the fourth layer, spunbond nonwoven fabric B, form a resonator with a cavity structure that further facilitates the dissipation of low-frequency sound waves. Through the combined effect of these layers, the nonwoven material exhibits excellent sound absorption and can achieve sound absorption over a wide frequency range. This broadband, high-sound-absorbing nonwoven material is simple to manufacture, lightweight, and suitable for acoustic environments such as automobiles, high-speed trains, and buildings. Detailed Implementation

[0041] The present invention will be further described in detail below through specific embodiments. Unless otherwise specified, the raw materials, reagents, or apparatus used in the embodiments can be obtained from conventional commercial sources or by existing technical methods. Unless otherwise specified, the experimental or testing methods are conventional methods in the art.

[0042] Example 1 A nonwoven material comprises four layers from top to bottom, wherein the first layer is spunbond nonwoven fabric A, the second layer is a nanofiber membrane, the third layer is meltblown nonwoven fabric, and the fourth layer is spunbond nonwoven fabric B; the side of spunbond nonwoven fabric B facing the meltblown nonwoven fabric has multiple grooves, and the grooves and the meltblown nonwoven fabric form a cavity structure.

[0043] The preparation method of spunbond nonwoven fabric A includes the following steps: 60 parts PP, 10 parts SEBS, and 15 parts low-melting-point (130℃) PE were added to three hoppers and melted and extruded separately using a three-screw extruder. The extruded material was then spunbond through a composite spinneret, stretched by airflow, and collected onto a web forming screen. After web formation, the material was thermally bonded between the hot rolling rolls (both the upper and lower rolls were smooth rolls) of a hot rolling mill to obtain spunbond nonwoven fabric A with a basis weight of 50.23 gsm, a thickness of 3.2 mm, and a porosity of 76%. The screw temperature for PP was 200℃, the screw temperature for SEBS was 180℃, the screw temperature for low-melting-point PE was 150℃, and the die temperature was 195℃. The hot rolling mill temperature was 80℃ and the pressure was 1 MPa.

[0044] The preparation method of meltblown nonwoven fabric includes the following steps: PP raw material is conventionally melt-extruded, then sprayed through a spinneret, stretched by airflow, and collected onto a web forming screen. After web formation, a meltblown nonwoven fabric with a basis weight of 60.05 gsm, a fiber fineness of 3.6 μm, and a thickness of 2.1 mm is obtained.

[0045] The method for preparing nanofiber membranes includes the following steps: 60 parts PP, 20 parts PET fragments (100μm in diameter), 1 part maleic anhydride-grafted polypropylene, and 0.1 parts antioxidant 626 were uniformly mixed and added to an extruder for melt blending to obtain a blend masterbatch. The blend masterbatch was added to a melt electrospinning device and heated to the melting temperature. Then, a nanofiber membrane with a basis weight of 8.24 gsm and a thickness of 0.13 mm was obtained on the surface of the meltblown nonwoven fabric by melt electrospinning. The spinning temperature was 225℃, the spinning voltage was 50KV, and the spinning distance was 5cm.

[0046] The preparation method of spunbond nonwoven fabric B differs from that of spunbond nonwoven fabric A only in that the upper roller of the hot rolling roller is a patterned roller with multiple protrusions on its surface and a protrusion height of 5mm. The hot melt ratio of the patterned roller is 8%, and a spunbond nonwoven fabric B with a basis weight of 50.23gsm and a thickness of 3.2mm is obtained.

[0047] The preparation method of nonwoven materials includes the following steps: The spunbond nonwoven fabric A, nanofiber membrane, meltblown nonwoven fabric and spunbond nonwoven fabric B prepared above are stacked in sequence from top to bottom, and then hot-rolled and bonded under the conditions of hot-pressing temperature of 120℃ and hot-pressing pressure of 2Mpa to obtain a nonwoven material with a basis weight of 168.75gsm and a thickness of 8.12mm.

[0048] Example 2 A nonwoven material comprises four layers from top to bottom, wherein the first layer is spunbond nonwoven fabric A, the second layer is a nanofiber membrane, the third layer is meltblown nonwoven fabric, and the fourth layer is spunbond nonwoven fabric B; the side of spunbond nonwoven fabric B facing the meltblown nonwoven fabric has multiple grooves, and the grooves and the meltblown nonwoven fabric form a cavity structure.

[0049] The preparation method of spunbond nonwoven fabric A includes the following steps: 60 parts PP, 20 parts SEBS, and 15 parts low-melting-point (130℃) PE were added to three hoppers and melt-extruded separately using a three-screw extruder. The extruded material was then spunbond through a composite spinneret, stretched by airflow, and collected onto a web forming screen. After web formation, the material was thermally bonded between the hot rolling rolls (both the upper and lower rolls were smooth) of a hot rolling mill to obtain spunbond nonwoven fabric A with a basis weight of 50.54 gsm, a thickness of 3.5 mm, and a porosity of 80%. The screw temperature for PP was 200℃, the screw temperature for SEBS was 180℃, the screw temperature for low-melting-point PE was 150℃, and the die temperature was 195℃. The hot rolling mill temperature was 80℃ and the pressure was 1 MPa.

[0050] The preparation method of meltblown nonwoven fabric includes the following steps: PP raw material is conventionally melt-extruded, then sprayed through a spinneret, stretched by airflow, and collected onto a web forming screen. After web formation, a meltblown nonwoven fabric with a basis weight of 60.05 gsm, a fiber fineness of 3.6 μm, and a thickness of 2.1 mm is obtained.

[0051] The method for preparing nanofiber membranes includes the following steps: 60 parts PP, 25 parts PET fragments (100μm in diameter), 1 part maleic anhydride-grafted polypropylene, and 0.1 parts antioxidant 626 were uniformly mixed and added to an extruder for melt blending to obtain a blend masterbatch. The blend masterbatch was added to a melt electrospinning device and heated to the melting temperature. Then, a nanofiber membrane with a basis weight of 8.25 gsm and a thickness of 0.14 mm was obtained on the surface of the meltblown nonwoven fabric by melt electrospinning. The spinning temperature was 225℃, the spinning voltage was 50KV, and the spinning distance was 5cm.

[0052] The preparation method of spunbond nonwoven fabric B differs from that of spunbond nonwoven fabric A only in that the upper roller of the hot rolling roller is a patterned roller with multiple protrusions on its surface and a protrusion height of 5mm. The hot melt ratio of the patterned roller is 8%, and a spunbond nonwoven fabric B with a basis weight of 50.54gsm and a thickness of 3.5mm is obtained.

[0053] The preparation method of nonwoven materials includes the following steps: The spunbond nonwoven fabric A, nanofiber membrane, meltblown nonwoven fabric and spunbond nonwoven fabric B prepared above are stacked in sequence from top to bottom, and then hot-rolled and bonded under the conditions of hot-pressing temperature of 120℃ and hot-pressing pressure of 2Mpa to obtain a nonwoven material with a basis weight of 169.38gsm and a thickness of 8.45mm.

[0054] Example 3 A nonwoven material comprises four layers from top to bottom, wherein the first layer is spunbond nonwoven fabric A, the second layer is a nanofiber membrane, the third layer is meltblown nonwoven fabric, and the fourth layer is spunbond nonwoven fabric B; the side of spunbond nonwoven fabric B facing the meltblown nonwoven fabric has multiple grooves, and the grooves and the meltblown nonwoven fabric form a cavity structure.

[0055] The preparation method of spunbond nonwoven fabric A includes the following steps: 60 parts PP, 20 parts SEBS, and 15 parts low-melting-point (130℃) PE were added to three hoppers and melt-extruded separately using a three-screw extruder. The extruded material was then spunbond through a composite spinneret, stretched by airflow, and collected onto a web forming screen. After web formation, the material was thermally bonded between the hot rolling rolls (both the upper and lower rolls were smooth) of a hot rolling mill to obtain spunbond nonwoven fabric A with a basis weight of 50.54 gsm, a thickness of 3.5 mm, and a porosity of 80%. The screw temperature for PP was 200℃, the screw temperature for SEBS was 180℃, the screw temperature for low-melting-point PE was 150℃, and the die temperature was 195℃. The hot rolling mill temperature was 80℃ and the pressure was 1 MPa.

[0056] The preparation method of meltblown nonwoven fabric includes the following steps: PP raw material is conventionally melt-extruded, then sprayed through a spinneret, stretched by airflow, and collected onto a web forming screen. After web formation, a meltblown nonwoven fabric with a basis weight of 60.05 gsm, a fiber fineness of 3.6 μm, and a thickness of 2.1 mm is obtained.

[0057] The method for preparing nanofiber membranes includes the following steps: 60 parts PP, 25 parts PET fragments (100μm in diameter), 1 part maleic anhydride-grafted polypropylene, and 0.1 parts antioxidant 626 were uniformly mixed and added to an extruder for melt blending to obtain a blend masterbatch. The blend masterbatch was added to a melt electrospinning device and heated to the melting temperature. Then, a nanofiber membrane with a basis weight of 8.25 gsm and a thickness of 0.14 mm was obtained on the surface of the meltblown nonwoven fabric by melt electrospinning. The spinning temperature was 225℃, the spinning voltage was 50KV, and the spinning distance was 5cm.

[0058] The preparation method of spunbond nonwoven fabric B differs from that of spunbond nonwoven fabric A only in that the upper roller of the hot rolling roller is a patterned roller with multiple protrusions on its surface and a protrusion height of 5mm. The hot melt ratio of the patterned roller is 10%, and a spunbond nonwoven fabric B with a basis weight of 50.54gsm and a thickness of 3.5mm is obtained.

[0059] The preparation method of nonwoven materials includes the following steps: The spunbond nonwoven fabric A, nanofiber membrane, meltblown nonwoven fabric and spunbond nonwoven fabric B prepared above are stacked in sequence from top to bottom, and then hot-rolled and bonded under the conditions of hot-pressing temperature of 120℃ and hot-pressing pressure of 2Mpa to obtain a nonwoven material with a basis weight of 169.38 and a thickness of 8.42mm.

[0060] Comparative Example 1 The only difference from Example 2 is that the first layer of spunbond nonwoven fabric A and the fourth layer of spunbond nonwoven fabric B do not contain the elastic material SEBS during the preparation process, while the other conditions are the same as in Example 2.

[0061] Comparative Example 2 The only difference from Example 2 is that the second nanofiber membrane uses an equal amount of PET masterbatch instead of PET fragments; all other conditions are the same as in Example 2.

[0062] Comparative Example 3 The only difference from Example 2 is that the patterned roller is replaced with a smooth roller in the preparation process of the fourth layer spunbond nonwoven fabric B. That is, the preparation method of the fourth layer spunbond nonwoven fabric B is the same as the preparation method of the first layer spunbond nonwoven fabric A, and the other conditions are the same as in Example 2.

[0063] Evaluation of the sound absorption performance of nonwoven materials The nonwoven materials prepared in Examples 1-3 and Comparative Examples 1-3 were used as samples. The sound absorption coefficient was tested according to GB / T 18696.1-2004 "Measurement of sound absorption coefficient and acoustic impedance in acoustic impedance tubes - Part 1: Standing wave ratio method". The test frequency range was 100-6300Hz. It was ensured that there was no air layer behind the sample and that there was no gap between the sample and the tube wall. Each sample was measured 3 times and the average value was taken. The test results are shown in Table 1.

[0064] Table 1

[0065] In Table 1, frequencies below 500Hz are considered low frequencies, frequencies between 500-2000Hz are considered mid frequencies, and frequencies above 2000Hz are considered high frequencies.

[0066] As shown in Table 1, Examples 1-3, using the materials and structures of this invention, yielded nonwoven materials with excellent sound absorption performance across the entire frequency range, with the sample from Example 2 exhibiting the best sound absorption performance. Compared to Example 1, Example 2 increased the amount of elastic material SEBS, resulting in a more fluffy texture and higher porosity. It also increased the amount of PET fragments, making the film rougher. Therefore, its high-frequency and mid-high-frequency absorption performance was relatively better than that of Example 1. Compared to Example 2, Example 3 adjusted the heat-melting ratio of the patterned roller, reducing the cavity structure between the third and fourth layers, resulting in relatively poor low-frequency absorption performance compared to Example 2.

[0067] Compared to Example 2, Comparative Example 1, since neither the first nor the fourth layer contains the elastic material SEBS, has a significantly lower porosity and a significantly lower high-frequency sound absorption performance. Comparative Example 2, due to the use of PET masterbatch, which is smoother than PET fragments, has a lower surface roughness of the nanofiber membrane, resulting in a reduction in mid-to-high frequency sound absorption performance. Comparative Example 3, due to the absence of a patterned roller with protrusions, has a fourth layer of spunbond nonwoven fabric B without grooves, making it impossible to form a cavity resonance structure with the third layer, thus significantly weakening the low-frequency sound absorption effect.

[0068] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A nonwoven material characterized in that, The non-woven material comprises a four-layer structure from top to bottom, wherein the first layer is a spun-bond non-woven fabric A, the second layer is a nanofiber membrane, the third layer is a melt-blown non-woven fabric, and the fourth layer is a spun-bond non-woven fabric B; the spun-bond non-woven fabric B has a plurality of grooves on the side facing the melt-blown non-woven fabric, and a cavity structure is formed between the grooves and the melt-blown non-woven fabric; The preparation raw material of the spun-bond non-woven fabric A comprises a main material, an elastic material, and a low-melting-point polymer; the main material comprises PP and / or PET, the elastic material comprises at least one of SEBS, PU, TPU, and POE, and the low-melting-point polymer comprises at least one of low-melting-point PE, low-melting-point EVA, and low-melting-point PET; The preparation raw material of the nanofiber membrane comprises PP and PET fragments; The preparation raw material of the melt-blown non-woven fabric comprises PP; The preparation raw material of the spun-bond non-woven fabric B is the same as that of the spun-bond non-woven fabric A.

2. The nonwoven material of claim 1, wherein, The melting point of the low-melting-point polymer is 110-140℃.

3. The nonwoven material of claim 1, wherein, The porosity of the spun-bond non-woven fabric A is 75%-80%.

4. The nonwoven material of claim 1, wherein, The diameter of the PET fragment is 80-200μm.

5. The nonwoven material of claim 1, wherein, The preparation raw material of the nanofiber membrane further comprises a compatibilizer and an antioxidant.

6. The nonwoven material of claim 1, wherein, The grammage of the non-woven material is 168-212gsm; and / or, the thickness of the non-woven material is 6-9mm.

7. The method of making a nonwoven material according to any of claims 1-6, characterized in that, The method comprises the following steps: The preparation raw material of the spun-bond non-woven fabric A is melt-extruded, spun into a web, and then heat-rolled and bonded between two smooth rollers to obtain the spun-bond non-woven fabric A; The melt-blown non-woven fabric is prepared, and the nanofiber membrane is prepared on the surface of the melt-blown non-woven fabric by using a melt electrospinning method; The preparation raw material of the spun-bond non-woven fabric B is melt-extruded, spun into a web, and then heat-rolled and bonded between a patterned roller and a smooth roller to obtain the spun-bond non-woven fabric B with a plurality of grooves; the surface of the patterned roller has a plurality of protrusions; The spun-bond non-woven fabric A, the nanofiber membrane, the melt-blown non-woven fabric, and the spun-bond non-woven fabric B are sequentially stacked from top to bottom, and then heat-rolled and bonded to obtain the non-woven material.

8. The production method according to claim 7, characterized by, The spinning temperature of the melt electrospinning method is 220-230℃; and / or, the spinning voltage of the melt electrospinning method is 50-75KV; and / or, the spinning distance of the melt electrospinning method is 5-8cm.

9. The preparation method according to claim 7, characterized in that, The height of the protrusions on the surface of the patterned roller is 4-6mm; and / or, the hot-melt ratio of the patterned roller is 5%-10%.

10. The non-woven material according to any one of claims 1-6 for use in the field of sound insulation.

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