A kind of preparation method of pet/pp composite sound-absorbing material

A technology of sound-absorbing material and hopper is applied in the field of preparation of PET/PP composite sound-absorbing material, which can solve the problems of complex production process, pollute the environment and high cost, and achieve the effect of small cavity volume, better sound absorption effect and good fit.

A technology of sound-absorbing material and hopper is applied in the field of preparation of PET/PP composite sound-absorbing material, which can solve the problems of complex production process, pollute the environment and high cost, and achieve the effect of small cavity volume, better sound absorption effect and good fit.

CN107599564BActive Publication Date: 2019-03-01宁波尚唯汽车饰件有限公司
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of PET / PP composite sound-absorbing material, comprising the steps of:

[0027] (1) First put PET and PP into the hopper of the melt-blown machine at a mass ratio of 3:6, and after being extruded and filtered, they are in a molten state, and the centrifugal cotton mesh surface is continuously sprayed with a melt-blown spinneret , forming a network structure, after the spinning is finished, it is rolled, cooled, and rolled into a flat sound-absorbing material. Before the spinning process, the centrifugal cotton mesh surface is also laid with an activated carbon fiber mesh surface;

[0028] (2) The sound-absorbing material prepared in step (1) is spread in the steam mold, and the steam mold is closed, and the steam engine is used to steam the sound-absorbing material through the steam mold. The pressure of the steam engine is 27Mpa, and the heating temperature of the steam mold Control at 225°C, and keep the heating time at 45s;

[0029] (3) Spread t...

Embodiment 2

[0034] A preparation method of PET / PP composite sound-absorbing material, comprising the steps of:

[0035] (1) First put PET and PP into the hopper of the melt-blown machine at a mass ratio of 3:7, and after being extruded and filtered, they are in a molten state, and the centrifugal cotton mesh surface is continuously sprayed with a melt-blown spinneret , forming a network structure, after the spinning is finished, it is rolled, cooled, and rolled into a flat sound-absorbing material. Before the spinning process, the centrifugal cotton mesh surface is also laid with an activated carbon fiber mesh surface;

[0036] (2) The sound-absorbing material to be made in step (1) is laid in the steam mold, and the steam mold is closed, and the steam engine is used to steam the sound-absorbing material through the steam mold. The pressure of the steam engine is 28Mpa, and the heating temperature of the steam mold Control at 230°C, and keep the heating time at 43s;

[0037] (3) Spread t...

Embodiment 3

[0042] A preparation method of PET / PP composite sound-absorbing material, comprising the steps of:

[0043] (1) First put PET and PP into the hopper of the melt-blown machine at a mass ratio of 3:8, and after being extruded and filtered, they are in a molten state, and the centrifugal cotton mesh surface is continuously sprayed by a melt-blown spinneret , forming a network structure, after the spinning is finished, it is rolled, cooled, and rolled into a flat sound-absorbing material. Before the spinning process, the centrifugal cotton mesh surface is also laid with an activated carbon fiber mesh surface;

[0044] (2) The sound-absorbing material prepared in step (1) is spread in the steam mold, and the steam mold is closed, and the steam engine is used to steam the sound-absorbing material through the steam mold. The pressure of the steam engine is 29Mpa, and the heating temperature of the steam mold Control at 225°C, and keep the heating time at 45s;

[0045] (3) Spread the...

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Abstract

The invention discloses a PET / PP composite sound-absorbing material preparation method, and relates to the technical field of vehicle interior decoration member processing, wherein the sound insulation pad comprises two layers of sound insulation cotton felts, and the preparation method comprises: melt spinning of a PET / PP mixture, steam mold pre-molding, cooling setting, water cutting and packaging warehousing. According to the present invention, the PET / PP composite sound-absorbing material is formed by compounding the multiple layer sound absorbing materials, comprises six layers, has characteristics of good sound absorbing effect, good fitting degree and good aesthetics; and in the preparation method, the high temperature steam is introduced into the interior of the sound absorbing material by using the steam mold and the steam engine so as to completely absorb water, the PET / PP composite mesh surface can fully expand and coil so as to fill the entire molding cavity, and the shaping with the cold mold is performed, such that the sound insulation pad prepared from the sound absorbing material can be attached to the vehicle front enclose member, the volume of the cavity is small,and the sound transmission medium (air) is reduced; and through the tight attachment of the sound insulation pad, the vibration of the attached surface is reduced, and the noise is reduced.

Description

technical field [0001] The invention relates to the technical field of processing automotive interior parts, in particular to a preparation method of a PET / PP composite sound-absorbing material. Background technique [0002] At present, the size of the car noise has reflected the quality and technical performance of the car. The more advanced the car is, the more the noise and vibration of the car must be transmitted to the passenger compartment as little as possible, which is often said in terminology to match the NVH performance of the whole car. NVH is a comprehensive issue to measure the quality of automobile manufacturing. It also gives the most intuitive feeling to automobile users and is an important part of automobile design and manufacturing. [0003] There are many sources of car noise, such as engines, gearboxes, drive axles, drive shafts, compartments, glass windows, tires, relays, horns, stereos, etc., and these parts will generate noise when they are working. ...

Claims

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Application Information

Patent Timeline
01 Mar 2019
Publication
CN107599564B
IPC
B32B27/02; B32B27/12; B32B37/08; B32B17/02; B32B17/12; B32B37/12; B32B37/10; B32B27/36; B32B37/06; B32B38/00; B32B27/32; B32B38/18; B60R13/08
Inventors
陈伟; 王明