Polyester nonwoven fabric for greatly reducing noises and realizing automobile lightweight, and preparation method thereof

Abstract

The invention discloses a polyester nonwoven fabric for greatly reducing noises and realizing automobile lightweight. The polyester nonwoven fabric sequentially comprises a compact layer, a semi-compact layer and a fluffy layer, the densities of the compact layer, the semi-compact layer and the fluffy layer successively decrease along the thickness direction of a polyester fiber lamella, the surface of the compact layer is compounded with a damping glue layer, and the surface of the fluffy layer is compounded with an expanded polytetrafluoroethylene film layer. A preparation method of the polyester nonwoven fabric comprises the following steps: sprinkling hot melt powder among the compact layer, the semi-compact layer and the fluffy layer of the polyester fiber lamella, sprinkling the hot melt powder on the surface of the fluffy layer, heating, and laminating the heated compact layer, the semi-compact layer and the fluffy layer to the expanded polytetrafluoroethylene film of the polytetrafluoroethylene film layer; and spraying damping glue of the damping glue layer on the compact layer. The polyester nonwoven fabric prepared in the above mode meets new requirements of automobile lightweight, enlarges the riding space in an automobile, and reduces noises in the automobile; and the damping glue can reduce low frequency noises generated due to vibration in the fast traveling process of the automobile, improves the comfort level of people in the automobile, reduces noise fatigue, and makes driving be safe.

Description

technical field [0001] The invention relates to the field of non-woven fabrics, in particular to a polyester non-woven fabric for reducing the weight of automobiles and a preparation method thereof. Background technique [0002] Automobile noise is divided into exterior noise and interior noise. The noise outside the vehicle refers to 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 drive train noise. The noise in the car refers to the part of the noise of the various parts of the car outside the car that is introduced into the car through various channels, and the noise that the vibration transmission path of the car parts stimulates the structural vibration of the various parts of the car body to radiate into the car. Under the constraints of the acoustic characteristics of the interior space, a relatively complex reverberation sound field is generated, thereby ...

AI Technical Summary

Problems solved by technology

At present, a large number of asphalt damping pads are used in automobiles, and the sound insulation effect is poor, causing peculiar smell in the automobile, and some models have an unpleasant smell

Dizziness and discomfort after a long period of time will affect driving safety

At present, the sound absorption coefficient of the sound-absorbing cotton (only fluffy cotton) on the market is very small, and the noise reduction effect after application in the car is average, which can no longer meet the higher requirements of car lightweight and car comfort.

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