CN211339914U - Spunlace nonwoven fabric composite sound insulation material capable of reducing low-frequency noise - Google Patents
Spunlace nonwoven fabric composite sound insulation material capable of reducing low-frequency noise Download PDFInfo
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- CN211339914U CN211339914U CN201922075369.XU CN201922075369U CN211339914U CN 211339914 U CN211339914 U CN 211339914U CN 201922075369 U CN201922075369 U CN 201922075369U CN 211339914 U CN211339914 U CN 211339914U
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Abstract
The utility model discloses a spunlace non-woven fabric composite sound insulation material capable of reducing low-frequency noise, which comprises a flame-retardant spunlace non-woven fabric, a spun-bonded melt-blown composite non-woven fabric, a flame-retardant spunlace non-woven fabric and an EPDM/EVA blending layer; the spun-bonded melt-blown composite non-woven fabric is compounded with the flame-retardant spunlace non-woven fabric and the flame-retardant needle-punched non-woven fabric through an adhesive; the EPDM/EVA blending layer is internally provided with glass beads, and each cubic centimeter contains 20-30 glass beads; the diameter of the glass micro-beads is 20-80 μm. The utility model relates to a can reduce water thorn non-woven fabrics combined material of low frequency noise, through the EPDM/EVA that sets up blend the layer and inside is provided with hollow glass microballon, hollow air bed has increased the reflection and the scattering of sound especially low frequency noise in this combined material, and the loss of sound energy in the material increases for this combined material sound insulation performance under low frequency noise. The flame-retardant spunlace non-woven fabric, the spun-bonded melt-blown composite non-woven fabric and the flame-retardant needle-punched non-woven fabric can effectively reduce medium-high frequency noise.
Description
Technical Field
The utility model belongs to the technical field of the non-woven fabrics technique and specifically relates to a can reduce water thorn non-woven fabrics composite sound insulation material of low frequency noise.
Background
It is known that, due to the limitation of the conventional production process, the conventional sound-insulating material can only absorb sound of high and medium frequencies well, but it is rather weak to absorb sound of other frequencies such as low frequencies. However, with the continuous progress and development of society, it is everyone's pursuit to have a healthy, quiet, peaceful urban residential living area. However, the fact proves that most residential districts in China are not in quiet and peaceful environments, most residential district properties receive complaints of householders on environmental noise, the noise comprises not only harsh high-frequency noise but also a large amount of low-frequency noise, and the low-frequency noise not only influences the production and life of people, but also has extremely strong harm to the body health of the surrounding people. Today, experts in gradient sound-absorbing cotton try to analyze pollution threats of low-frequency noise in the process of urbanization and explain treatment methods of the pollution threats.
There are four main categories of low frequency noise sources: elevators, transformers, central air conditioners (including cooling towers) and traffic noise, generally refers to sound having a frequency below 500 hertz (octave). The direct effect of low-frequency noise on physiology is not as obvious as high-frequency noise, but recently, experts engaged in low-frequency noise research in China indicate that low-frequency noise can cause neurosis such as headache and insomnia. At present, the domestic sound environment quality standard and the monitoring mode thereof mainly aim at the detection of high-frequency noise, and the low-frequency noise is not high in decibel number, so that citizens are often afflicted by noise but complained of nothing.
The noise frequency of the low-frequency noise is below 500 Hz. The low-frequency noise in high-rise buildings mainly comes from elevators, transformers, water pumps for secondary water supply, traffic and the like. The sound of each main area in the city, such as an underground parking lot, a drainage system and an electric power system, is sampled and analyzed by investigators, most of the sound belongs to low-frequency noise, and the low-frequency noise is also a main noise source influencing the surrounding masses. The data shows that the low frequency noise generated by the refrigerator is about 30 decibels, the low frequency noise generated by the washing machine is 40 decibels, and the low frequency noise generated by the elevator is about 35 decibels. Although the low-frequency noise value is not very large, the low-frequency noise value is very harmful to human bodies. Because the low noise has the characteristics of long sound wave length, low weakening speed and capability of easily passing through the barrier, the low-frequency sound wave can be transmitted into the ears of people even if the low-frequency sound wave leaves the people. The propagation path of low-frequency noise is very wide, and the low-frequency noise mainly propagates through the following three ways: the structure is used for transmitting sound, which means that low-frequency sound waves are transmitted to the home of a user through a structural girder and a bearing wall in a building; the second is air sound transmission, which means that energy generated by low-frequency noise is transferred through the vibration of air, so that the energy is transmitted to ears of people to influence the health of people; the third is standing wave, which is formed by multiple reflections during the propagation of low frequency noise and is a serious hazard to human body.
A resident who is in low-frequency noise for a long time often generates a vexing psychology, and the resident can cause the middle ear to generate strong oppression feeling in physiology, so that symptoms such as tinnitus, headache, nausea and the like can be caused, and the resident can also generate arrhythmia symptoms. Since infrasound is a sound that cannot be heard by the human ear, the human body does not feel subjective. When the staff of the thermal power plant is subjected to physical examination, inspectors find that sound waves are transmitted into cerebral cortex and hypothalamus by stimulating auditory sense of the staff due to noise, so that blood sugar, blood fat and cholesterol of workers are influenced, and compared with examination results of the workers in the common environment, the indexes of blood sugar, blood fat and cholesterol of the workers in the low-frequency noise environment for a long time are obviously higher than those of the common workers.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can reduce low frequency noise's compound acoustic material of water thorn non-woven fabrics to current inhale the sound and the acoustic material is to handling the unfavorable problem of low frequency noise.
In order to solve the technical problem, the purpose of the utility model is to realize like this:
the utility model relates to a spunlace nonwoven fabric composite sound insulation material capable of reducing low-frequency noise, which comprises a flame-retardant spunlace nonwoven fabric, a spun-bonded melt-blown composite nonwoven fabric, a flame-retardant spunlace nonwoven fabric and an EPDM/EVA blending layer;
the spunbonded melt-blown composite non-woven fabric is compounded with the flame-retardant spunlace non-woven fabric and the flame-retardant needle-punched non-woven fabric through an adhesive;
the EPDM/EVA blending layer is internally provided with glass beads, and each cubic centimeter of EPDM/EVA blending layer contains 20-30 glass beads; the diameter of the glass beads is 20-80 μm;
the flame-retardant needle-punched non-woven fabric and the EPDM/EVA blending layer are compounded through hot pressing.
As a further explanation of the above scheme, the spunbond meltblown composite nonwoven fabric is formed by sandwiching at least one layer of meltblown nonwoven fabric between two layers of spunbond nonwoven fabrics and ultrasonically laminating the layers.
As a further illustration of the above scheme, the fiber used in the flame-retardant spunlace nonwoven fabric is a flame-retardant viscose fiber, a flame-retardant polyester fiber or an aramid fiber 1313.
As a further explanation of the above scheme, the fibers used in the flame-retardant needle-punched non-woven fabric are black flame-retardant polyester fibers.
As a further explanation of the above scheme, the spunbond meltblown composite nonwoven fabric and the flame retardant needle-punched nonwoven fabric are further provided with a flame retardant spunlace nonwoven fabric and a spunbond meltblown composite nonwoven fabric.
The utility model has the advantages that: the utility model relates to a can reduce water thorn non-woven fabrics combined material of low frequency noise, through the EPDM/EVA that sets up blend the layer and inside is provided with hollow glass microballon, hollow air bed has increased the reflection and the scattering of sound especially low frequency noise in this combined material, and the loss of sound energy in the material increases for this combined material sound insulation performance under low frequency noise. The flame-retardant spunlace non-woven fabric, the spun-bonded melt-blown composite non-woven fabric and the flame-retardant needle-punched non-woven fabric can effectively reduce medium-high frequency noise. And the flame-retardant needle-punched non-woven fabric of the flame-retardant spunlace non-woven fabric can improve the flame retardant property of the composite material.
Drawings
FIG. 1 is a schematic structural view of a composite acoustical insulation according to an embodiment;
FIG. 2 is a schematic view of a structure of a spunbonded meltblown composite nonwoven fabric according to an embodiment;
FIG. 3 is a schematic view of the structure of a spunbond meltblown composite nonwoven fabric according to a second embodiment;
fig. 4 is a schematic structural view of a composite soundproof material according to a third embodiment.
The designations in the figures illustrate the following: 1-flame-retardant spunlace non-woven fabric; 2-spun-bonded melt-blown composite non-woven fabric; 21-spunbond nonwoven; 22-melt blown nonwoven; 3-flame retardant needle-punched non-woven fabric; 4-EPDM/EVA blend layer; 5-glass beads.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments.
Example one
This embodiment will be described in detail with reference to fig. 1. The spunlace nonwoven fabric composite sound insulation material capable of reducing the frequency noise is characterized by comprising a flame-retardant spunlace nonwoven fabric 1, a spun-bonded melt-blown composite nonwoven fabric 2, a flame-retardant needle-punched nonwoven fabric 3 and an EPDM/EVA blending layer 4 which are sequentially arranged.
The spun-bonded melt-blown composite non-woven fabric 2 is compounded with the flame-retardant spunlace non-woven fabric 1 and the flame-retardant needle-punched non-woven fabric 3 through an adhesive. That is, adhesive particles are sprinkled and fixed on the surface of the flame-retardant needle-punched non-woven fabric 3, and then the spun-bonded melt-blown composite non-woven fabric 2 is bonded with the flame-retardant needle-punched non-woven fabric by hot pressing. Then, adhesive particles are scattered and fixed on the surface of the spun-bonded melt-blown composite non-woven fabric 2, and the flame-retardant spunlace non-woven fabric 1 is bonded with the spun-bonded melt-blown composite non-woven fabric by hot pressing.
The fiber used by the flame-retardant spunlace non-woven fabric 1 is flame-retardant viscose fiber, flame-retardant polyester fiber or aramid 1313. In this example, the selected polyester fiber is black. The gram weight of the flame-retardant spunlace nonwoven fabric is 40-50 grams per square meter, and preferably 45 grams.
The fiber used in the flame-retardant needle-punched non-woven fabric 3 used in the embodiment is black flame-retardant polyester fiber, and the gram weight is 200-300 g/m, preferably 200 g/m.
The spun-bonded melt-blown composite non-woven fabric 2 is formed by sandwiching at least one layer of melt-blown non-woven fabric between two layers of spun-bonded non-woven fabrics and compounding the layers by adopting ultrasonic waves. In the present embodiment, the spunbonded/meltblown composite nonwoven fabric 2 is formed by sandwiching a meltblown nonwoven fabric 22 between two spunbonded nonwoven fabrics 21. The spun-bonded non-woven fabric 21 uses bicomponent fibers with a sheath-core structure, the sheath layer is polypropylene, and the core layer is polyethylene terephthalate. The meltblown nonwoven 22 is a polypropylene meltblown nonwoven. The gram weight of the spunbonded melt-blown composite nonwoven fabric 2 is 30-40 grams per square meter, the gram weight of the spunbonded nonwoven fabric 21 is 15 grams per square meter, and the gram weight of the melt-blown nonwoven fabric 22 is 10 grams per meter.
In this embodiment, the EPDM/EVA blend layer 4 is internally provided with hollow glass beads 5, and 20 to 30 glass beads 5 are contained in each cubic centimeter of the EPDM/EVA blend layer 4. The diameter of the glass beads is 20-80 μm, and the effective density is 0.2g/cm3The average particle size was 55 μm, and the compressive strength was 580 psi. The areal density of the EPDM/EVA blend layer 4 was 1500-2000 grams per square meter. The EPDM/EVA blending layer 4 has the EPDM and EVA ratio of 50: 50. moreover, the diameters of the glass beads 5 contained in the EPDM/EVA blend layer in this example include 20, 40, 50, 70, 80 μm, five specifications corresponding to low-frequency noise of different frequencies.
In this embodiment, when the EPDM/EVA blend layer 4 is prepared, the hollow glass beads 5 are uniformly mixed with the EPDM/EVA mixture, and the EPDM/EVA blend layer 4 is formed by extrusion, and it is necessary to cool the mixture, and in the cooling process, since the EPDM/EVA blend layer 4 is in a soft state, the flame retardant spunlace nonwoven fabric 1, the spunbond/meltblown composite nonwoven fabric 2, and the flame retardant needle-punched nonwoven fabric 3 which are compounded are hot-pressed with the EPDM/EVA blend layer 4 to be compounded. The EPDM/EVA blending layer 4 is compounded with the flame-retardant needle-punched non-woven fabric 3 by hot pressing.
The thickness of the flame-retardant needle-punched non-woven fabric 4 is thick, and the gaps inside the non-woven fabric are more, so that the middle and high frequency noise can be effectively prevented. And the hollow glass beads 5 arranged in the EPDM/EVA blending layer 4 can have good barrier effect on low-frequency noise.
Tests on the composite sound insulation material according to the embodiment show that the sound volume decibel can be reduced by about 50% of low-frequency noise and about 95% of medium-high frequency noise.
Example two
This embodiment will be described in detail with reference to fig. 2. The spunlace nonwoven composite sound insulation material capable of reducing low frequency noise in the embodiment is different from the first embodiment in that: the spunbonded-meltblown composite nonwoven 2 is formed by sandwiching two layers of meltblown nonwoven 22 between two layers of spunbonded nonwoven 21.
EXAMPLE III
This embodiment will be described in detail with reference to fig. 3. The spunlace nonwoven composite sound insulation material capable of reducing low frequency noise in the embodiment is different from the first embodiment in that:
the spun-bonded melt-blown composite non-woven fabric 2 and the flame-retardant needle-punched non-woven fabric 3 are also provided with a flame-retardant spunlace non-woven fabric 1 and a spun-bonded melt-blown composite non-woven fabric 2.
That is, the composite sound insulating material according to the present embodiment is, in order: the flame-retardant spunlace nonwoven fabric comprises six layers of a flame-retardant spunlace nonwoven fabric 1, a spun-bonded melt-blown composite nonwoven fabric 2, a flame-retardant needled nonwoven fabric 3 and an EPDM/EVA blending layer 4. The blocking of medium and high frequency noise can be further improved.
The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.
Claims (5)
1. A spunlace non-woven fabric composite sound insulation material capable of reducing low-frequency noise is characterized by comprising a flame-retardant spunlace non-woven fabric (1), a spun-bonded melt-blown composite non-woven fabric (2), a flame-retardant needle-punched non-woven fabric (3) and an EPDM/EVA blending layer (4);
the spun-bonded melt-blown composite non-woven fabric (2) is compounded with the flame-retardant spunlace non-woven fabric (1) and the flame-retardant needle-punched non-woven fabric (3) through an adhesive;
the EPDM/EVA blending layer (4) is internally provided with glass beads (5), and each cubic centimeter of the EPDM/EVA blending layer (4) contains 20-30 glass beads (5); the diameter of the glass beads (5) is 20-80 μm;
the flame-retardant needle-punched non-woven fabric (3) and the EPDM/EVA blending layer (4) are compounded through hot pressing.
2. A spunlace nonwoven composite sound insulation material capable of reducing low frequency noise according to claim 1, wherein the spunbonded meltblown composite nonwoven (2) is formed by ultrasonically laminating two layers of spunbonded nonwoven (21) with at least one layer of meltblown nonwoven (22) sandwiched therebetween.
3. A spunlace nonwoven composite sound insulation material capable of reducing low-frequency noise according to claim 1, wherein the fibers used in the flame-retardant spunlace nonwoven (1) are flame-retardant viscose fibers, flame-retardant polyester fibers or aramid fibers 1313.
4. A spunlace nonwoven composite sound insulation material capable of reducing low frequency noise according to claim 1, wherein the fibers used in the flame retardant needle-punched nonwoven (3) are black flame retardant polyester fibers.
5. A spunlace nonwoven composite sound insulation material capable of reducing low-frequency noise according to claim 1, wherein the spunbonded melt-blown composite nonwoven fabric (2) and the flame-retardant needle-punched nonwoven fabric (3) are further provided with a flame-retardant spunlace nonwoven fabric (1) and a spunbonded melt-blown composite nonwoven fabric (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922075369.XU CN211339914U (en) | 2019-11-27 | 2019-11-27 | Spunlace nonwoven fabric composite sound insulation material capable of reducing low-frequency noise |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922075369.XU CN211339914U (en) | 2019-11-27 | 2019-11-27 | Spunlace nonwoven fabric composite sound insulation material capable of reducing low-frequency noise |
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| Publication Number | Publication Date |
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| CN211339914U true CN211339914U (en) | 2020-08-25 |
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| CN201922075369.XU Active CN211339914U (en) | 2019-11-27 | 2019-11-27 | Spunlace nonwoven fabric composite sound insulation material capable of reducing low-frequency noise |
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| CN (1) | CN211339914U (en) |
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