Preparation method of automobile noise reduction interior composite material

Abstract

The invention relates to a preparation method of an automobile noise reduction interior composite material, and belongs to the technical field of sound absorption materials. Sisal fibers are used as raw materials to prepare the automobile noise reduction interior composite material. The sisal fibers belong to leaf fibers and are natural plant fibers, the sisal hemp is simple to plant and short inmature period, no chemical fertilizer needs to be applied in the planting process, the cost of the interior material can be effectively reduced, the sisal fibers are excellent in moisture absorption and air permeability, free of static electricity, good in rigidity, excellent in ultraviolet resistance and good in noise elimination performance and antibacterial health care performance, the interiors of the sisal fibers are polygonal and are provided with oval middle cavities of different sizes, and the middle cavity structure can effectively improve the sound absorption effect of the automotiveinterior material. The automobile noise reduction interior composite material is prepared by taking silicone rubber as a raw material, and since particles of the silicone rubber have elasticity, whensound waves contact with the silicone rubber, the sound waves in the composite material are absorbed when contacting with the rubber particles, so that the noise of friction braking is reduced.

Description

technical field

[0001] The invention relates to a preparation method of a noise-reducing interior trim composite material for an automobile, and belongs to the technical field of sound-absorbing materials. Background technique

[0002] As a new type of composite material, non-woven composite material has been paid more and more attention by automobile manufacturers due to its short process flow, high labor productivity, wide use of raw materials and broad product application fields, and its development momentum is extremely rapid. As a new type of composite material, non-woven needle-punched felt has been used in automotive interior materials through compression molding, and the amount is still increasing. At the same time, with the development of the economy and the improvement of people's living standards, the demand for automobiles continues to grow. Therefore, nonwoven materials for automobiles, especially automotive interior materials, have a huge market space. [000...

Examples

Embodiment 1

[0038] In parts by weight, weigh 30 parts of sisal fiber, 10 parts of sodium hydroxide, 100 parts of deionized water, 6 parts of vinyltrimethoxysilane, and 60 parts of absolute ethanol, and add sodium hydroxide to deionized water , stirred at a speed of 160r / min for 10min at room temperature to obtain a sodium hydroxide solution, placed the sisal fiber in a fiber cutter, cut it into short fibers of 6mm at room temperature, added it to the sodium hydroxide solution, and placed it in a water bath at 50°C Stir at a speed of 200r / min for 20min, soak in heat for 2h to obtain a fiber suspension, leave the fiber suspension at room temperature for 1h, add dropwise hydrochloric acid with a mass concentration of 1% to adjust the pH to 7, filter, take the filter residue, and wash with deionized water 3 times, dry in an oven at 40°C for 1 hour to obtain alkali-treated sisal short fibers, add vinyltrimethoxysilane to absolute ethanol, and stir at 180r / min for 10 minutes at room temperature ...

Embodiment 2

[0040] In parts by weight, weigh 35 parts of sisal fiber, 13 parts of sodium hydroxide, 125 parts of deionized water, 7 parts of vinyltrimethoxysilane, and 70 parts of absolute ethanol, and add sodium hydroxide to deionized water , stirred at a speed of 170r / min for 13min at room temperature to obtain a sodium hydroxide solution, placed the sisal fiber in a fiber cutter, cut it into short fibers of 7mm at room temperature, added it to the sodium hydroxide solution, and heated it in a water bath at 55°C Stir at a speed of 220r / min for 25min, soak in heat for 3h to obtain a fiber suspension, leave the fiber suspension at room temperature for 1.5h, add dropwise hydrochloric acid with a mass concentration of 1% to adjust the pH to 7, filter, take the filter residue, and use deionized water Wash 4 times, dry in an oven at 45°C for 1.5h to obtain alkali-treated sisal short fibers, add vinyltrimethoxysilane to absolute ethanol, stir at 190r / min for 11min at room temperature, and obtai...

Embodiment 3

[0042]In parts by weight, weigh 40 parts of sisal fiber, 15 parts of sodium hydroxide, 150 parts of deionized water, 8 parts of vinyltrimethoxysilane, and 80 parts of absolute ethanol, and add sodium hydroxide to deionized water , stirred at a speed of 180r / min for 15min at room temperature to obtain a sodium hydroxide solution, placed the sisal fiber in a fiber cutter, cut it into short fibers of 8mm at room temperature, added it to the sodium hydroxide solution, and heated it at 50~60°C Stir at a speed of 240r / min for 30min in a water bath, soak in heat for 4h to obtain a fiber suspension, let the fiber suspension stand at room temperature for 2h, add dropwise 1% hydrochloric acid to adjust the pH to 7, filter, take the filter residue, and use deionized Wash 5 times with water, dry in an oven at 50°C for 2 hours to obtain alkali-treated sisal short fibers, add vinyltrimethoxysilane to absolute ethanol, and stir at 200r / min for 12 minutes at room temperature to obtain modified...

technical field

[0001] The invention relates to a preparation method of a noise-reducing interior trim composite material for an automobile, and belongs to the technical field of sound-absorbing materials. Background technique

[0002] As a new type of composite material, non-woven composite material has been paid more and more attention by automobile manufacturers due to its short process flow, high labor productivity, wide use of raw materials and broad product application fields, and its development momentum is extremely rapid. As a new type of composite material, non-woven needle-punched felt has been used in automotive interior materials through compression molding, and the amount is still increasing. At the same time, with the development of the economy and the improvement of people's living standards, the demand for automobiles continues to grow. Therefore, nonwoven materials for automobiles, especially automotive interior materials, have a huge market space. [000...

Examples

Embodiment 1

[0038] In parts by weight, weigh 30 parts of sisal fiber, 10 parts of sodium hydroxide, 100 parts of deionized water, 6 parts of vinyltrimethoxysilane, and 60 parts of absolute ethanol, and add sodium hydroxide to deionized water , stirred at a speed of 160r / min for 10min at room temperature to obtain a sodium hydroxide solution, placed the sisal fiber in a fiber cutter, cut it into short fibers of 6mm at room temperature, added it to the sodium hydroxide solution, and placed it in a water bath at 50°C Stir at a speed of 200r / min for 20min, soak in heat for 2h to obtain a fiber suspension, leave the fiber suspension at room temperature for 1h, add dropwise hydrochloric acid with a mass concentration of 1% to adjust the pH to 7, filter, take the filter residue, and wash with deionized water 3 times, dry in an oven at 40°C for 1 hour to obtain alkali-treated sisal short fibers, add vinyltrimethoxysilane to absolute ethanol, and stir at 180r / min for 10 minutes at room temperature ...

Embodiment 2

[0040] In parts by weight, weigh 35 parts of sisal fiber, 13 parts of sodium hydroxide, 125 parts of deionized water, 7 parts of vinyltrimethoxysilane, and 70 parts of absolute ethanol, and add sodium hydroxide to deionized water , stirred at a speed of 170r / min for 13min at room temperature to obtain a sodium hydroxide solution, placed the sisal fiber in a fiber cutter, cut it into short fibers of 7mm at room temperature, added it to the sodium hydroxide solution, and heated it in a water bath at 55°C Stir at a speed of 220r / min for 25min, soak in heat for 3h to obtain a fiber suspension, leave the fiber suspension at room temperature for 1.5h, add dropwise hydrochloric acid with a mass concentration of 1% to adjust the pH to 7, filter, take the filter residue, and use deionized water Wash 4 times, dry in an oven at 45°C for 1.5h to obtain alkali-treated sisal short fibers, add vinyltrimethoxysilane to absolute ethanol, stir at 190r / min for 11min at room temperature, and obtai...

Embodiment 3

[0042]In parts by weight, weigh 40 parts of sisal fiber, 15 parts of sodium hydroxide, 150 parts of deionized water, 8 parts of vinyltrimethoxysilane, and 80 parts of absolute ethanol, and add sodium hydroxide to deionized water , stirred at a speed of 180r / min for 15min at room temperature to obtain a sodium hydroxide solution, placed the sisal fiber in a fiber cutter, cut it into short fibers of 8mm at room temperature, added it to the sodium hydroxide solution, and heated it at 50~60°C Stir at a speed of 240r / min for 30min in a water bath, soak in heat for 4h to obtain a fiber suspension, let the fiber suspension stand at room temperature for 2h, add dropwise 1% hydrochloric acid to adjust the pH to 7, filter, take the filter residue, and use deionized Wash 5 times with water, dry in an oven at 50°C for 2 hours to obtain alkali-treated sisal short fibers, add vinyltrimethoxysilane to absolute ethanol, and stir at 200r / min for 12 minutes at room temperature to obtain modified...

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