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Processing process of environment-friendly sound insulation pad

A processing technology and sound-insulating pad technology, applied in the direction of adhesive additives, filament/wire forming, non-polymer adhesive additives, etc., can solve the problems of reducing the mechanical strength of fibers, reducing the density, and reducing the sound absorption effect. Achieve the effect of improving sound absorption capacity, reducing fiber density and maintaining mechanical strength

Active Publication Date: 2021-08-27
芜湖尚唯汽车饰件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the lightweight sound-absorbing fabric requires that the thickness of the sound-absorbing material should not be too large, otherwise it is not conducive to the subsequent laying and application, and reducing the surface density will make the holes in the sound-absorbing material larger and the density lower, while too large aperture and too small The density will lead to a significant reduction in the sound absorption effect, so the adjustment range of the surface density is extremely small, which is not conducive to lightweight improvement
Existing sound-insulating mats mostly use sound-insulating materials on the surface of the fabric or sandwich them inside the fabric. The method of covering requires the use of glue or colloid, but it is easy to densely fill the pores during the process of applying the colloid, resulting in microporous sound-absorbing materials. loss of muffler effect
At the same time, when the microporous noise reduction strategy is adopted, if there are micropores in the fiber itself, although it can effectively absorb sound, it will also greatly reduce the mechanical strength of the fiber, resulting in the fiber membrane being easily broken during the application process and inconvenient to use.

Method used

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  • Processing process of environment-friendly sound insulation pad
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  • Processing process of environment-friendly sound insulation pad

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The electrospinning device used in the present invention is mainly composed of a high-voltage power supply (the voltage adjustment range is 0-30kV, and the micro-injection pump can be equipped with 10 nozzles. The diameter of the syringe needle used in this embodiment is 0.4mm, and the drum receiving device (The speed adjustment range is 0-200r / min, the length of the roller is 60cm and the reciprocating sliding table device (moving speed range is 0-20°Cm / min), the device such as figure 1 shown.

[0021] The present invention selects polyacrylonitrile (PAN) or polyethylene terephthalate (PET), which has a relatively mature electrospinning process, as solute and DMF as solvent spinning to prepare polyester fibers, so as to obtain PET nanofibers with good morphology. Membrane or mesoporous fiber membrane, so as to obtain nanofiber material with better sound absorption performance. The specific steps are:

[0022] (1) Preparation of PET nanofiber membranes u...

Embodiment 2

[0044] Embodiment 2: all the other are identical with embodiment 1, difference is:

[0045] The ambient humidity in the step (1) is set to 50 ± 5%;

[0046] With the amount of mesoporous material added as 0.05, 0.1, 0.2, 0.4, 0.8 and 1.0wt% of the polyacrylonitrile spinning solution, set up experimental groups to prepare mesoporous fiber membranes respectively, and measure the mechanical strength of mesoporous fiber membranes. The results are as follows :

[0047] Table 5 Effect of mesoporous materials on sound absorption coefficient and mechanical strength of mesoporous fiber membranes

[0048]

[0049] The results in Table 5 show that the addition of mesoporous materials will make the interior of the PAN fiber porous. With the increase of the amount of mesoporous materials, the PAN fibers become more fluffy, resulting in a gradual decrease in the mechanical strength of the mesoporous fiber membrane, but the absorption The sound coefficient gradually increases. In order ...

Embodiment 3

[0050] Embodiment 3: all the other are identical with embodiment 1, difference is that SiO 2 The airgel accounts for 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 1.0% of the total weight of the colloid, and the humidity is set at 50±5%. The sound absorption coefficient of the composite membrane was measured, and the results are as follows:

[0051] Table 6 Effect of airgel in colloid on sound absorption coefficient

[0052]

[0053]

[0054] The results in Table 6 show that although the addition of airgel can significantly improve the sound absorption coefficient of the composite membrane, due to the extremely small specific gravity of aerogel, adding too much airgel will lead to a decrease in the adhesion between the membrane layers, and There is limited help in improving the noise reduction coefficient.

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Abstract

The invention discloses a processing process of an environment-friendly sound insulation pad. The processcomprises the steps of porous PET fiber spinning film forming, mesoporous fiber film spinning film forming and multilayer film compositing. PET fibers are made to present a porous morphology by changing condition parameters during electrostatic spinning, and nanoscale micropores in the PET fibers and micron-sized pores formed by interweaving the fibers form a two-stage pore mechanism, so that under the condition that the thickness of the material is not increased, the sound absorption capacity of the material is effectively improved; SiO2 aerogel is added into the colloid, so that pores in the fiber membrane can be effectively prevented from being densely filled with the colloid, and meanwhile, the pores can assist in silencing; by adding the mesoporous material with a porous structure in a proper proportion, not only can the fiber density be reduced and the silencing effect be improved, but also the mechanical strength of the fiber can be maintained, so that the porous PET fiber is reinforced after compounding, so that the composite film is not easy to break during use; and the sound attenuation performance of the compounded membrane material is higher than that of a single PET fiber membrane or a single mesoporous fiber membrane.

Description

technical field [0001] The invention relates to the field of sound-insulating non-woven fabrics, in particular to a processing technology of an environment-friendly sound-insulating pad. Background technique [0002] Electrospinning is a method of charging and deforming a polymer solution or melt by means of a high-voltage electrostatic field, forming a pendant cone-shaped droplet at the end of the nozzle, when the charge repulsion on the surface of the droplet exceeds its surface tension, in the liquid Jets are formed on the surface of the droplet, and these jets are stretched at high speed by electric field force, solvent volatilization and solidification in a short distance, and finally deposited on the receiving plate to form polymer nanofibers. It mainly includes solution spinning and melt spinning. The development of melt spinning is limited by a series of problems such as the high temperature environment required in the production process and the diameter of the spun ...

Claims

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Application Information

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IPC IPC(8): B32B27/02B32B27/12B32B27/36B32B27/30B32B9/02B32B9/04B32B7/12B32B37/12D04H1/728D01D5/00D04H1/43D04H1/435D01F6/54D01F1/10D01F6/84C09J129/14C09J11/04
CPCB32B5/022B32B5/26B32B7/12B32B37/12D04H1/728D01D5/003D04H1/43D04H1/435D01F6/54D01F1/10D01F6/84C09J129/14C09J11/04B32B2262/0284B32B2262/02B32B2262/062B32B2262/065B32B2307/102C08K7/26
Inventor 何红胜
Owner 芜湖尚唯汽车饰件有限公司
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