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Preparation method of fiber material with low-frequency sound absorption and insulation functions

A sound absorption and sound insulation, fiber material technology, applied in the field of sound absorption materials, can solve the problems of poor flame retardancy, corrosion resistance and moisture resistance, easy to cause pollution, weak sound absorption ability, etc., to achieve low cost, increased surface area, good The effect of sound absorption and sound insulation

Inactive Publication Date: 2017-08-11
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN203895111U discloses a composite material with a sound-absorbing and sound-insulating structure. Adhesives are used to bond rubber foam layers, fiber non-woven felts and damping sound-insulating felts to prepare sound-absorbing materials. It has excellent sound-absorbing and shock-proof effects, but its High cost, not conducive to degradation, easy to cause pollution
However, as we all know, natural sound-absorbing materials such as natural fibers have good sound-absorbing performance in high-frequency sound waves, but weak sound-absorbing ability in low-frequency, and their flame retardancy, corrosion and moisture resistance are poor, and they can be used in harsh environments. difficult to use

Method used

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  • Preparation method of fiber material with low-frequency sound absorption and insulation functions
  • Preparation method of fiber material with low-frequency sound absorption and insulation functions
  • Preparation method of fiber material with low-frequency sound absorption and insulation functions

Examples

Experimental program
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Effect test

Embodiment 1

[0028] 1. Put sisal fibers with a diameter of 100um and a length of 2mm into 20wt% NaOH aqueous solution, heat to 70°C and soak for 6h, then wash with water until neutral, and dry in a drying oven at 50°C.

[0029] 2. Mix the treated sisal fiber with an aqueous solution of 18wt% polyurethane adhesive at a mass ratio of 1:5, and stir at a high speed mechanically until the sisal fiber is uniformly suspended and dispersed in the mixture, which is recorded as sisal fiber suspension.

[0030] 3. The above-mentioned sisal fiber suspension is poured into a mould, and formed by a hot press forming process to obtain a fiber material with a low-frequency sound absorption and sound insulation function, with a thickness of 8mm; the hot press forming process is: the cast mold is heated The sound-absorbing material is obtained by hot-pressing and solidifying on a press molding machine. The hot-pressing time is 4-10 minutes, the hot-pressing temperature is 80-140° C., and the hot-pressing pre...

Embodiment 2

[0032] 1. Put sisal fibers with a diameter of 100um and a length of 2mm into 5wt% NaOH aqueous solution, heat to 70°C and soak for 6h, and then soak the alkali-treated sisal fibers in 15% H 2 o 2 In the aqueous solution, heat to 70°C and soak for 6 hours, then wash with water until neutral, and dry in a drying oven at 50°C.

[0033] 2. Mix the treated sisal fiber with an aqueous solution of 18wt% polyurethane adhesive at a mass ratio of 1:5, and stir at a high speed mechanically until the sisal fiber is uniformly suspended and dispersed in the mixture, which is recorded as sisal fiber suspension.

[0034] 3. The above-mentioned sisal fiber suspension is poured into a mould, and formed by a hot press forming process to obtain a fiber material with a low-frequency sound absorption and sound insulation function, with a thickness of 8mm; the hot press forming process is: the cast mold is heated The sound-absorbing material is obtained by hot-pressing and solidifying on a press mo...

Embodiment 3

[0036]1. Put sisal fibers with a diameter of 100um and a length of 2mm into 5wt% NaOH aqueous solution, heat to 70°C and soak for 6h, and then soak the alkali-treated sisal fibers in 15% H 2 o 2 In the aqueous solution, heat to 70°C and soak for 6 hours, then wash with water until neutral, and dry in a drying oven at 50°C.

[0037] 2. Mix the treated sisal fiber with an aqueous solution of 18wt% polyurethane adhesive at a mass ratio of 1:5, and stir at a high speed mechanically until the sisal fiber is uniformly suspended and dispersed in the mixture, which is recorded as sisal fiber suspension.

[0038] 1. First pour a layer of sisal fiber suspension into the model, then spread a layer of PE elastic film (thickness 0.05mm, the same below), then pour a layer of sisal fiber suspension, and then spread a layer of PE Finally, all the remaining sisal fiber suspension is poured into the mold, and hot-pressed to obtain a fiber material with low-frequency sound-absorbing and sound-i...

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Abstract

The invention discloses a preparation method of a fiber material with low-frequency sound absorption and insulation functions. The preparation method comprises steps as follows: natural fibers are treated with alkali and an oxidizing agent and then are mixed with an adhesive solution, and a suspension is prepared; the suspension is poured into a mold, or an elastic film is inserted into the mold in a pouring process, and the fiber material with the low-frequency sound absorption and insulation functions is obtained. According to the preparation method, the natural fibers with wide sources and low cost are selected as raw materials and subjected to alkali treatment and oxidation treatment, paths allowing sound waves to enter the fibers are increased, then the fiber material is directly prepared from the natural fibers in a sub-fiber state under the adhesion action of an adhesive or is prepared from the natural fibers in the sub-fiber state and the elastic film, and the preparation method is simple, green, environment-friendly and low in cost; with the addition of the elastic film, not only can incident sound waves be effectively reflected, but also part of sound energy rings can be absorbed through intermolecular friction under the action of vibration load produced by sound waves, and the good sound absorption and insulation effects are realized.

Description

technical field [0001] The invention relates to a preparation method of a fiber material for reducing noise, in particular to a preparation method of a fiber material with low-frequency sound absorption and sound insulation functions, and belongs to the technical field of sound absorption materials. Background technique [0002] With the rapid development of industry, environmental pollution is not optimistic, and noise pollution has become an urgent problem that people need to solve. Generally, there are interconnected pores inside the material. When sound waves enter the material, the air in the pores will vibrate, and a part of the sound energy will be converted into heat energy, thereby attenuating the sound waves and achieving a good sound absorption effect. In the case of complex sound sources or complex sound transmission paths, in order to improve the noise reduction effect, it is necessary to use materials with good sound absorption and sound insulation capabilities...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L1/04C08L75/04C08B15/02B32B37/06B32B37/10
CPCB32B37/06B32B37/10B32B2307/102C08B15/02C08L1/04C08L75/04C08L2205/16
Inventor 王婷葛曷一刘志芳
Owner UNIV OF JINAN
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