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Cavity sound-absorbing material damping plate and preparation method thereof

A technology of sound-absorbing materials and damping panels, applied in chemical instruments and methods, layered products, transportation and packaging, etc., can solve the problems of chemical corrosion resistance, easy aging, harmful to human body, etc., achieve good sound insulation and noise reduction, light material , the effect of high toughness

Active Publication Date: 2017-07-07
天津市浩迪橡塑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the main damping plates in the market are rubber and asphalt damping plates. These two types of damping plates have different problems. Asphalt damping plates will produce harmful gases at high temperatures, are not resistant to chemical corrosion, and are easy to age.

Method used

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  • Cavity sound-absorbing material damping plate and preparation method thereof
  • Cavity sound-absorbing material damping plate and preparation method thereof
  • Cavity sound-absorbing material damping plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 As shown, a cavity sound-absorbing material damping board is composed of a surface layer 1, a cavity layer 2, an EPDM foamed sound insulation layer 3, and a modified epoxy resin adhesive layer 4 arranged in order from top to bottom. The surface layer is made of polyvinyl chloride artificial leather material, and a plurality of circular holes 5 are uniformly spaced on the surface layer; the cavity material is a rigid polyvinyl chloride material, and the cavity layer and the surface layer are uniformly spaced in a one-to-one correspondence. A horn-shaped cavity 6. The horn-shaped cavity is wide at the top and narrow at the bottom.

[0041] The EPDM foam sound insulation layer material is composed of the following formula: EPDM: 100 kg, calcium carbonate: 15 kg, N330 carbon black: 15 kg, foaming agent OBSH: 5 kg, foaming aid NaHCO3: 3 kg, urea: 4 Kg, paraffin wax: 3 kg, antioxidant 2246: 4 kg, stearic acid: 6 kg, zinc oxide: 10 kg, DCP: 6 kg, short basalt fi...

Embodiment 2

[0052] The difference from Example 1 is:

[0053] The EPDM foam sound insulation layer material is composed of the following formula: EPDM: 100 kg, calcium carbonate: 5 kg, N330 carbon black: 5 kg, blowing agent OBSH: 3 kg, foaming aid NaHCO3: 1 kg, urea: 2 Kg, paraffin wax 0.5 kg, antioxidant 2246: 0.5 kg, stearic acid: 2 kg, zinc oxide: 2 kg, DCP: 2 kg, short basalt fiber: 5 kg, white sugar: 3 kg. The short basalt fiber has a diameter of 0.01-0.05mm and a length of 10-20mm. White granulated sugar needs to be ground to a particle size of 200-225 mesh.

[0054] 1. Add the above-mentioned materials to a 75-liter internal mixer for mixing, the mixing temperature is 85-90℃, and the mixing time is 7-9min. To be used in the calendering process.

[0055] 2. Put the mixed EPDM film into a drum vulcanizer to foam the EPDM layer within 20 minutes at 140-160℃.

[0056] 3. Put the foamed EPDM foamed sound insulation layer into boiling water in a water tank and boil it for 5 minutes. After boi...

Embodiment 3

[0063] The difference from Example 1 is:

[0064] The EPDM foam sound insulation layer material is composed of the following formula: EPDM: 100 kg, calcium carbonate: 10 kg, N330 carbon black: 8 kg, blowing agent OBSH: 3.5 kg, foaming aid NaHCO3: 2 kg, urea: 3 Kilogram, paraffin wax: 1 kg, antioxidant 2246: 2 kg, stearic acid: 4 kg, zinc oxide: 5 kg, DCP: 3 kg, short basalt fiber: 5.5 kg, starch: 5 kg. The short basalt fiber has a diameter of 0.01-0.05mm and a length of 10-20mm. Starch needs to be ground to a particle size of 200-225 mesh.

[0065] 1. Add the above-mentioned materials to a 75-liter internal mixer for mixing, the mixing temperature is 85-90℃, and the mixing time is 7-9min. To be used in the calendering process.

[0066] 2. Put the mixed EPDM film into a drum vulcanizer to foam the EPDM layer within 20 minutes at 140-160℃.

[0067] 3. Put the foamed EPDM foamed sound insulation layer into boiling water in a water tank and boil for 5 minutes. After boiling, the starch...

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Abstract

The invention provides a cavity sound-absorbing material damping plate and a preparation method thereof. The damping plate is composed of a surface layer, a cavity layer, an EPDM (Ethylene-Propylene-Diene Monomer) foaming sound absorbing layer and a modified epoxy resin adhesive layer which are sequentially arranged from top to bottom. The surface layer is a polyvinyl chloride artificial leather material, and round holes are punched in the surface layer; and a horn type cavity is formed in the cavity layer and is of a structure which is wide in top and narrow in bottom. The cavity sound-absorbing material damping plate disclosed by the invention has the beneficial effects that noise in a vehicle enters a small circular pore diameter structure in the surface layer through sound vibration, and then noise vibration enters the wide space in the horn type cavity again, so that the noise energy is suddenly dispersed and then lost. As the horn type cavity is of the structure which is wide in top and narrow in bottom, the residual sound energy enters the narrow space and then is lost. After the noise vibration passes through the horn type cavity, vibration energy in the noise is absorbed by the EPDM foam layer, and harsh noise on the surface of the EPDM foam layer generates the interference and diffuse reflection phenomenon so as to reduce propagation of the noise.

Description

Technical field [0001] The invention belongs to the technical field of sound insulation and noise reduction materials, and relates to a damping plate for cars, which is a cavity sound-absorbing material damping plate and a preparation method thereof. Background technique [0002] Today, when automobiles are becoming more and more popular, people have a deeper understanding of automobile damping materials and higher requirements for automobile safety and comfort. The main function of the damping plate in the car is sound absorption and noise reduction. The noise generated by the contact between the tire and the ground during the driving process, the noise generated by the engine vibration, the noise generated by the rapid air circulation in the body cavity, etc. will affect the personnel in the car. Comfort. Therefore, it is particularly important to install a damping plate with excellent noise reduction performance on the car. Installing sound-absorbing materials on the top of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B3/24B32B27/30B32B27/06B32B27/32B32B7/12B32B25/08B32B33/00B60R13/08C08L23/16C08L91/06C08K13/04C08K3/26C08K3/04C08K5/09C08K3/22C08K7/10C08J9/10
Inventor 李和平倪备郑彦明王庆凯肖焰李博
Owner 天津市浩迪橡塑科技有限公司
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