| 摘要 |
PURPOSE: An engine room insulator for a vehicle in which sound absorption performances are improved is provided to obtain thermal insulation effects like an air layer and to reduce noise through a hollow of sound absorption materials. CONSTITUTION: An engine room insulator for a vehicle in which sound absorption performances are improved is manufactured as a hollow fiber sound insulation material. The hollow fiber sound insulation material comprises an upper felt layer, a lower felt layer, and a filler. The upper felt layer and the lower felt layer are manufactured by mixing a low-melting point polyester fiber and a polyester hollow fiber at a predetermined ratio. The upper felt layer and the lower felt layer are manufactured as a sheet shape, and a plurality of sheets is laminated to form one layer. The filler is manufactured by mixing the low-melting point polyester fiber, a black fiber, and foam chip at a predetermined ratio. The filler is formed between the upper felt layer and the lower felt layer. |
