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A two-component sound-absorbing material for vehicles and its preparation method

A sound-absorbing material and two-component technology, applied in the field of sound-absorbing materials, can solve the problems of white pollution and high price, and achieve the effect of simple method, convenient processing, and improved sound-absorbing and noise-reducing effect

Active Publication Date: 2019-04-23
GUANGXI DEFUTE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a two-component sound-absorbing material for vehicles and its preparation method. The technical problem to be solved is: the traditional sound-absorbing cotton has sound-absorbing and noise-reducing effect, high price, and easy to cause white pollution.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A two-component sound-absorbing material for vehicles: made of EVA / PP blended fibers and PP fibers; EVA / PP blended fibers are used instead of traditional PET fibers. EVA is biodegradable and has a low melting point, less than 100°C. While improving the sound absorption and noise reduction effect, it is more environmentally friendly.

[0028] In the above embodiments, the content of EVA / PP blended fiber is 50%-80%, and the content of PP fiber is 20%-50%; the content of EVA / PP blended fiber is high, which can improve sound absorption and noise reduction.

[0029] In the above embodiments, the content of EVA in the EVA / PP blended fiber is 10%-30%; EVA improves the effect of sound absorption and noise reduction, and is more environmentally friendly.

[0030] In the above embodiments, the diameter of the PP fiber is 10 or 20 μm.

[0031] In the above examples, the diameter of the EVA / PP blended fiber is 10 or 20 μm.

[0032] In the above embodiments, the length of the EVA / ...

Embodiment 2

[0034] A method for preparing a two-component sound-absorbing material for vehicles, comprising the following steps:

[0035] Step S1. Mix EVA pellets and PP pellets uniformly in a ratio of 20:80, and add the uniformly mixed mixture to a twin-screw mixing extruder, and the twin-screw mixing extruder will process the mixture at 210 ° C. Melt and knead and extrude into a strip compound, and cut the compound into blended pellets with a length of 2 mm;

[0036] Step S2. Put the blended pellets into a twin-screw composite spinning machine, melt extrusion and spin at a temperature of 220° C., and prepare EVA / PP blended fibers with a diameter of 15 μm;

[0037] Step S3. Put the PP pellets into a twin-screw compound spinning machine, melt extrusion and spinning at a temperature of 205° C., and prepare PP fibers with a diameter of 10 μm.

[0038] Step S4. Blending EVA / PP blended fibers and PP fibers in a ratio of 60:40 into rolls to obtain a two-component sound-absorbing material for ...

Embodiment 3

[0049] A method for preparing a two-component sound-absorbing material for vehicles, comprising the following steps:

[0050] Step S1. Mix EVA pellets and PP pellets uniformly in a ratio of 30:70, and add the uniformly mixed mixture to a twin-screw mixing extruder, and the twin-screw mixing extruder will process the mixture at 200 ° C. Melt and knead and extrude into a strip compound, and cut the compound into blended pellets with a length of 2mm;

[0051] Step S2. Put the blended pellets into a twin-screw composite spinning machine, melt extrusion and spin at a temperature of 210°C, and prepare EVA / PP blended fibers with a diameter of 20 μm;

[0052] Step S3. Put the PP pellets into a twin-screw compound spinning machine, melt extrusion and spinning at a temperature of 205° C., and prepare PP fibers with a diameter of 10 μm.

[0053] Step S4. Blending EVA / PP blended fibers and PP fibers in a ratio of 75:25 into rolls to obtain a two-component sound-absorbing material for veh...

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Abstract

The invention relates to vehicle two-component sound absorbing material and a preparation method for the same. The vehicle two-component sound absorbing material is manufactured via mixture of EVA / PP blend fibers and PP fibers; the content of the EVA / PP blend fibers is 50% to 80%; the content of the PP fibers is 20% to 50%; and the content of EVA in the EVA / PP blend fibers is 10% to 30%. Compared with the prior art, sound absorbing and noise reduction effect can be improved; and the material can be easily decomposed, so environment can be protected.

Description

technical field [0001] The invention relates to the technical field of sound-absorbing materials, in particular to a two-component sound-absorbing material for vehicles and a preparation method thereof. Background technique [0002] At present, the traditional polyester fiber PET and PP (polypropylene) two-component sound-absorbing cotton has been widely used in the field of automobile sound insulation and noise reduction, which greatly improves the NVH performance of the vehicle. However, PET fiber is a typical polyester fiber, which has a high melting point and is difficult to degrade, causing serious white pollution. How to develop new polymer sound-absorbing materials with high environmental friendliness, good sound absorption and noise reduction effect, and low price is of great significance. Contents of the invention [0003] The purpose of the present invention is to provide a two-component sound-absorbing material for vehicles and its preparation method. The techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4382D04H1/4291
CPCD04H1/4291D04H1/4382D10B2321/022D10B2505/12
Inventor 蓝国勇
Owner GUANGXI DEFUTE TECH CO LTD
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