Sound insulation pad for automobile and preparation method of sound insulation pad

Abstract

The invention discloses a sound insulation pad for an automobile and a preparation method of the sound insulation pad. The sound insulation pad for the automobile is prepared from two elastic fiber layers and a modified fiber layer arranged between the two elastic fiber layers, wherein each elastic fiber layer is prepared from low-melting-point fibers, cotton and PET (polyethylene terephthalate) fibers in a weight ratio being 0.95:1:1, and the modified fiber layer is prepared from modified anti-bacterial and mildew-proof fibers, low-melting-point PET fibers, regenerated fibers, corn fibers and chitin fibers; the modified anti-bacterial and mildew-proof fibers are prepared from garlic residues, medical stone, diatomite, litsea cubeba oil and PET particles. An interlayer bonding process adopts needling reinforced bonding, and the conditions that traditional sound insulation pad bonding glue reduces the sound insulation effect and emits harmful gas are avoided; the sound insulation pad for the automobile is low in production cost and high in environmental protection performance, increases acoustic absorptivity of high-and-low-frequency waves, has bacteriostatic and bactericidal effects as well as effects of purifying air and regulating air conditions, and can release anions and improve air quality in the automobile.

Description

technical field [0001] The invention relates to the technical field of automobile interior parts, in particular to an automobile sound insulation pad and a preparation method thereof. Background technique [0002] Car interior parts are generally installed inside the car body to play the role of beautification, protection, and sound insulation and sound absorption. Car sound insulation pads can be applied to various parts of the car engine compartment, passenger compartment, trunk, etc., with shock absorption, attraction, heat insulation, etc. Features, in the era of more and more pursuit of high performance, environmental protection, lightweight, and comfort, car interiors have become an important factor for people to choose cars just like car shapes, so the requirements for car interiors are getting higher and higher. At present, automobile sound insulation pads are mainly made of recycled fiber felt and PU foam; there are the following technical problems: the fiber felt r...

AI Technical Summary

Problems solved by technology

[0002] Car interior parts are generally installed inside the car body to play the role of beautification, protection, and sound insulation and sound absorption. Car sound insulation pads can be applied to various parts of the car engine compartment, passenger compartment, trunk, etc., with shock absorption, attraction, heat insulation, etc. Features, in the era of more and more pursuit of high performance, environmental protection, lightweight, and comfort, car interiors have become an important factor for people to choose cars just like car shapes, so the requirements for car interiors are getting higher and higher. At present, automobile sound insulation pads are mainly made of recycled fiber felt and PU foam; there are the following technical problems: the fiber felt reinforced with phenolic resin has a strong smell and is easy to pollute the environment; the fiber felt is exposed, which is likely to cause unqualified volatile organic compounds. In addition, Performance indicators such as low weight, high strength, sound insulation, and sound absorption of sound-insulating mats have become bottlenecks, restricting the development of sound-insulating mats. In the prior art, sound-insulating mats with large weight, high price, and low utilization rate have been unable to meet people's growing needs. There is an urgent need to develop automotive sound insulation mats with superior performance and multiple functions to increase market competitiveness and improve the quality of automotive interiors

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