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A kind of noise reduction material, its preparation method and automobile engine cover

A noise reduction and cork technology, applied in the field of noise reduction materials and car hoods, can solve the problems of increasing the cost of vehicles, the inability to take into account the mechanical properties and light weight, etc., to ensure light weight, ensure sound absorption and sound insulation effect, and enhance mechanical properties. Effect

Active Publication Date: 2021-01-01
BEIJING ELECTRIC VEHICLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] As the main area for sound absorption and noise reduction, the corrugated sound-absorbing cotton is mainly used in the hood of the car to enhance the sound-absorbing and heat-insulating effect. Considering the special environment of engine heating, there are strict requirements on the thermal stability and mechanical properties of the sound-absorbing cotton. The replacement of the vehicle increases the cost of the vehicle, and the improvement of the traditional mechanical properties needs to sacrifice the advantages of the product's lightweight, resulting in an inability to balance the mechanical properties and lightweight

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0025] The embodiment of the present invention discloses a method for preparing a noise reducing material, comprising the following steps:

[0026] Step S1: treating granular cork and fibrous cork with pectinase, and drying to obtain enzymolyzed cork material;

[0027] Step S2: Ultrasonic impregnation of the enzymolyzed cork material with a mixture of tetraethylorthosilicate and isocyanate to obtain an impregnated cork material;

[0028] Step S3: using a thermosetting resin to heat and press the impregnated cork material to obtain a noise reducing material.

[0029] The invention uses two types of cork with different shapes as base materials, and obtains the noise-reducing material through a series of treatments. The combined use of the cork materials with the two shapes can increase the contact points between the base materials, and the mechanical strength of the material can be improved after being glued by the thermosetting resin.

[0030] The following describes the prep...

Embodiment 1

[0054]The granular cork and the fibrous cork are treated with pectinase at 40° C. for 3 hours and then dried to control the water content of the enzymolyzed cork material to be 3% to 5%.

[0055] Ultrasonic impregnation of the enzymatically hydrolyzed cork material with a mixture of tetraethyl orthosilicate and isocyanate at a mass ratio of 1:1, the ultrasonic frequency of the ultrasonic impregnation is 45kHz, the time is preferably 4h, and the temperature is 35°C to obtain impregnated After the cork material;

[0056] Use epoxy resin to cure the impregnated cork material by hot pressing, the mass ratio of epoxy resin to impregnated cork material is 1:1, the hot pressing temperature is 140°C, and the hot pressing pressure is 10MPa to obtain the noise reduction material .

[0057] The lightweight data and mechanical properties of the prepared noise reduction material were tested. The experimental results showed that the noise reduction material prepared in this example had a b...

Embodiment 2

[0064] Use pectinase to treat granular cork with a particle size of 80-500 microns and fibrous cork with an aspect ratio of 50:1 at 40°C. After 5 hours of treatment, dry it to control the enzymolysis. The moisture content of the cork material is 3% to 5%.

[0065] Ultrasonic impregnation of the enzymatically hydrolyzed cork material with a mixture of tetraethyl orthosilicate and isocyanate at a mass ratio of 1:2, the ultrasonic frequency of the ultrasonic impregnation is 50kHz, the time is preferably 3h, and the temperature is 40°C to obtain impregnated After the cork material;

[0066] The impregnated cork material is cured by hot pressing with liquid phenolic resin, the mass ratio of liquid phenolic resin to the impregnated cork material is 2:1, the hot pressing temperature is 150°C, and the hot pressing pressure is 15MPa to obtain the noise reduction material .

[0067] The lightweight data and mechanical properties of the prepared noise-reducing material were tested, and...

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Abstract

The invention relates to the field of automotive materials, in particular to a noise reduction material, a preparation method thereof and an automobile hood. The preparation method of the noise reduction material comprises the steps of treating granular corks and fibrous corks with pectinase, and drying to obtain a cork material after enzymolysis; using a mixture of tetraethyl orthosilicate and isocyanate to ultrasonically impregnate the cork material after the enzymolysis to obtain an impregnated cork material; making the impregnated cork material subjected to hot press curing using a thermosetting resin to obtain the noise reduction material. The noise reduction material prepared by the method has good sound insulation and noise reduction effect, light weight, good thermal stability andgood mechanical properties, and is particularly suitable for the automobile hood.

Description

technical field [0001] The invention relates to the field of automobile materials, in particular to a noise reduction material, a preparation method thereof and an automobile engine cover. Background technique [0002] With the continuous improvement of living standards, people's demand for cars has gradually increased from the initial means of transportation to a comfortable mobile space. Therefore, the mechanical properties and comfort performance of the car itself have become important standards for measuring the quality of cars, among which car noise is one. important criteria. [0003] Automobile noise is a comprehensive noise source including noise of various natures, which can be divided into exterior noise and interior noise. Among them, the noise outside the vehicle refers to the part of the noise radiated from various parts of the vehicle to the space outside the vehicle, mainly including engine noise, exhaust noise, tire noise, brake noise and transmission system...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/00C08L97/02C08L61/06B27K7/00B62D25/10
CPCB27K7/00B62D25/105C08L61/06C08L63/00C08L97/02
Inventor 马俊杰秦国振
Owner BEIJING ELECTRIC VEHICLE
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