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Flame-resistive sound absorber

A sound-absorbing material and flame-retardant technology, applied in the field of sound-absorbing materials for hoods, can solve problems such as difficult disposal and achieve excellent sound-absorbing properties

Inactive Publication Date: 2006-06-07
NAGOYA OIL CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the hood sound damping material using glass fiber is difficult to dispose of because the glass fiber cannot be incinerated.

Method used

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  • Flame-resistive sound absorber
  • Flame-resistive sound absorber
  • Flame-resistive sound absorber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] A phenol-formaldehyde initial condensate (initial condensate of phenolic resin) with a solid content of 60% by mass was impregnated in a sheet formed of polyethylene terephthalate fibers and entangled by needle punching ( Denier: 10dtex, weight per unit area: 400g / m 2 , Thickness: 10mm). The impregnation amount of the initial condensate was adjusted so that the content of the phenolic resin (solid content) would be 50% by mass based on the weight per unit area of ​​the sheet.

[0072] Dry and pre-cure the sheet impregnated with the initial condensate of the phenolic resin at 150° C., and then hot-press the pre-cured sheet at 200° C. for 60 seconds to obtain a molded product with a thickness of 5 mm ( Example 1).

Embodiment 2 and Embodiment 3

[0074] Using the initial condensate of the phenolic resin and the sheet in Example 1 above, the sheet was impregnated with the initial condensate so that the weight per unit area of ​​the phenolic resin (solid content) relative to the sheet became 100% by mass. content and 200 mass % content, and the same as the above-mentioned embodiment 1, pre-cured the sheet, and thermocompression molding, thereby making the molded article (embodiment 2 and embodiment 3) that thickness is 5mm respectively.

Embodiment 4

[0086] A phenol / alkylresorcinol-formaldehyde initial condensate (initial condensate of phenolic resin) with a solid content of 55% by mass is impregnated into a sheet made of polypropylene fibers and entangled by needle punching (fineness: 0.02dtex, weight per unit area: 300g / m 2 , Thickness: 15mm). The impregnation amount of the initial condensate was adjusted so that the content of the phenolic resin (solid content) would be 70% by mass with respect to the weight per unit area of ​​the sheet.

[0087] Dry and pre-cure the sheet impregnated with the initial condensate of the phenolic resin at 150° C., then hot-press the pre-cured sheet at 200° C. for 45 seconds to obtain a molded product with a thickness of 7 mm ( Example 4).

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Abstract

An object of the present invention is to provide a sound-absorbing material, which is a sound-absorbing material such as a hood sound-absorbing material installed under a hood panel for absorbing the sound of an automobile engine, and is excellent in flame retardancy and sound absorption. It is a flame-retardant sound-absorbing material (1) composed of a porous base material (2) containing a phenolic resin. Fibers with a fineness of 0.02 dtex to 50 dtex are used in the porous base material (2), and the The content of the phenolic resin is adjusted to be 50 to 200% by mass relative to the weight per unit area (g / m2) of the porous substrate (2).

Description

technical field [0001] The present invention relates to a flame-retardant sound-absorbing material for absorbing noise, such as a hood sound-absorbing material for absorbing engine sound of an automobile, and the like. Background technique [0002] A hood sound deadening material 1P is attached to the underside of the car hood panel to absorb engine sound. As this hood sound absorbing material 1P, such as Figure 4 As shown, there is provided a material in which a nonwoven fabric 12P of polyester such as PET is laminated on glass fiber 2P having good heat resistance and sound absorption (Japanese Patent Application Laid-Open No. 64-36433). [0003] As mentioned above, although the glass fiber 2P is used in the hood noise damping material 1P, the glass fiber 2P is easy to scratch and the workability is not good, and the glass fiber 2P has the disadvantage of easily generating fine glass flake dust and deteriorating the operating environment. question. In addition, in the co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/16G10K11/162B60R13/08
CPCB60R13/0838G10K11/16
Inventor 小川正则伊藤邦矩早川康正
Owner NAGOYA OIL CHEM CO LTD