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Sound-insulating and thermal-insulating compositions and material, preparation method of sound-insulating and thermal-insulating material, car front-wall sound-insulating and thermal-insulating pad, and car-used carpet

A thermal insulation material and composition technology, applied in vehicle parts, transportation and packaging, special positions of vehicles, etc., can solve the problems affecting the NVH performance of the whole vehicle, non-fitting of sheet metal surfaces, poor sound insulation performance, etc., to achieve The effect of excellent performance, best performance and low cost

Active Publication Date: 2018-07-10
NOBO AUTOMOTIVE SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sound insulation performance of hard felt + soft felt is poor. Due to the material characteristics, it is prone to deformation problems, resulting in non-fitting with the sheet metal surface, and a "cavity" in the matching position, which affects the NVH performance of the vehicle.

Method used

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  • Sound-insulating and thermal-insulating compositions and material, preparation method of sound-insulating and thermal-insulating material, car front-wall sound-insulating and thermal-insulating pad, and car-used carpet

Examples

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preparation example Construction

[0044] The present invention also provides a method for preparing a sound-insulating and heat-insulating material, the method comprising:

[0045] (1) polyether polyol and barium sulfate are mixed to obtain the first mixture;

[0046] (2) contacting the first mixture with isocyanate to obtain a second mixture;

[0047] (3) Spraying the second mixture onto the mold surface.

[0048] In the present invention, the amount of polyether polyol, barium sulfate and isocyanate can vary within a wide range, for example, relative to 100 parts by weight of isocyanate, the amount of polyether polyol can be 185-210 parts by weight parts, the amount of barium sulfate can be 600-660 parts by weight. In order to obtain a sound and heat insulation material with better performance, preferably, relative to 100 parts by weight of isocyanate, the amount of polyether polyol used is 190-205 parts by weight, and the amount of barium sulfate used is 610-650 parts by weight.

[0049] In the present i...

Embodiment 1

[0070] This embodiment is used to illustrate the sound insulation and heat insulation material provided by the present invention and the automobile cowl heat insulation pad

[0071] 21.3 parts by weight of polyether polyol and 68 parts by weight of barium sulfate were uniformly mixed, the mixing temperature was 75° C., and the mixing time was 20 minutes. Then, the above mixture was mixed with 10.7 parts by weight of isocyanate (at a temperature of 25° C.) to obtain a mixture to be sprayed, and the mixing time was 5 s. The mixture to be sprayed is then sprayed. Use the mechanical arm to spray on the surface of the mold, the spraying time is 80s, and the spraying speed is 100g / s. After spraying, it was cured at 25°C for 5s to obtain a heavy-coated skin. Then put the heavy-coated skin into the foaming punching mold for mold clamping, then add foaming material at a rate of 200g / s, foam at a mold temperature of 60°C, and hold pressure for 80s. Then mold opening is carried out to...

Embodiment 2

[0073] This embodiment is used to illustrate the sound insulation and heat insulation material provided by the present invention and the automobile cowl heat insulation pad

[0074] 20.3 parts by weight of polyether polyol and 69.6 parts by weight of barium sulfate were uniformly mixed, the mixing temperature was 80° C., and the mixing time was 15 minutes. Then the mixture was mixed with 10.7 parts by weight of isocyanate (25° C.) to obtain a mixture to be sprayed, and the mixing time was 5 s. The mixture to be sprayed is then sprayed. Use the mechanical arm to spray onto the surface of the mold, the spraying time is 100s, and the spraying speed is 110g / s. After spraying, it was cured at 25°C for 5s to obtain a heavy-coated skin. Then put the heavy-coated skin into the foaming punching mold for mold clamping, then add foaming material at a speed of 300g / s, foam at a mold temperature of 55°C, and hold pressure for 85s. Then mold opening is carried out to obtain the automobil...

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Abstract

The invention relates to the technical field of car front-wall thermal-insulating pads, and discloses sound-insulating and thermal-insulating compositions and material, a preparation method of the sound-insulating and thermal-insulating material, a car front-wall sound-insulating and thermal-insulating pad, and a car-used carpet. The compositions used for forming the sound-insulating and thermal-insulating material comprise isocyanate, polyether polyol and barium sulfate. The preparation method of the sound-insulating and thermal-insulating material comprises the steps that (1) the polyether polyol and the barium sulfate are mixed to obtain a first mixture; (2) the first mixture makes contact with the isocyanate to obtain a second mixture; and (3) the second mixture is sprayed on the surface of a mold. According to the sound-insulating and thermal-insulating material, the sound-insulating effect is good, the cost is low, flexible design such as equal density unequal thickness and equalthickness unequal density of a car front wall can be realized, and the design degree of freedom of the car front-wall sound-insulating and thermal-insulating pad is increased.

Description

technical field [0001] The invention relates to the technical field of automobile front wall insulation pads, in particular to a composition for forming a sound-insulating and heat-insulating material, a sound-insulating and heat-insulating material and a preparation method thereof, an automobile front wall sound-insulating and heat-insulating pad and a A car carpet. Background technique [0002] With the development of the automobile industry, the NVH (noise, vibration and harshness) performance of the whole vehicle is getting more and more attention, and the NVH performance requirements of auto parts are also getting higher and higher. As the hub of the engine compartment and the cab, the heat insulation pad of the front wall of the car plays a major role in the NVH performance of the whole vehicle; [0003] The production process of the cowl heat insulation pad in the industry is mainly divided into three major processes: heavy layer + foaming (the double layer molding p...

Claims

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Application Information

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IPC IPC(8): B60R13/08B60N3/04
CPCB60N3/042B60R13/0823
Inventor 刘新义张义李步涛董海龙刘俊刚
Owner NOBO AUTOMOTIVE SYST CO LTD
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