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PET/PP composite sound-absorbing material preparation method

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

Active Publication Date: 2018-01-19
宁波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

[0006] Chinese patent application number 201210478186.2 discloses a PET fiber / polyacrylonitrile fiber composite sound-absorbing cotton, which is made of the following raw materials in parts by weight: PET fiber 70-80, polyacrylonitrile fiber 40-50, emulsifier OP-20 10 -15, Pingpingjia O-15 5-10, PP 80-100, SEBS 30-40, calcined clay 15-20, modified diatomite 10-15, stearic acid 2-3, diisophthalic acid Octyl ester 5-8, tricresyl phosphate 4-6, polyethylene wax 2-3, vinyl tris (β-methoxyethoxy) silane 1-2, calcium stearate 2-3, dimethyl Isooctyl tin dimercaptoacetate 1-2, anti-aging agent ODA 0.5-1.5, antioxidant 1035 1-2, although the sound-absorbing cotton prepared by this method has a certain flame-retardant and sound-absorbing effect, but due to the use of A large number of organic polymer materials lead to heavy odor and pollute the environment
However, the production process of this material is complicated and the cost is high

Method used

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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 steam is steamed to the cotton felt through the steam mold by a steam engine. 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 the sound-...

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 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 cotton felt 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 the sound-abso...

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 steam is steamed to the cotton felt through the steam mold by a steam engine. The pressure of the steam engine is 29Mpa, and the heating temperature of the steam mold is Control at 225°C, and keep the heating time at 45s;

[0045] (3) Spread the sound...

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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

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IPC IPC(8): B32B27/02B32B27/12B32B37/08B32B17/02B32B17/12B32B37/12B32B37/10B32B27/36B32B37/06B32B38/00B32B27/32B32B38/18B60R13/08
Inventor 陈伟王明
Owner 宁波尚唯汽车饰件有限公司
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