Soundproofing material

A technology of sound insulation materials and porous bodies, applied in the field of sound insulation materials, can solve the problems of poor processability, poor dispersibility, poor flocculation, hard resilience of foam, etc.

Active Publication Date: 2019-01-15
NICHIAS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when other inorganic fibers other than asbestos fibers are used, since the dispersibility and flocculation are poor, the produced foam is hard and has low resilience, and for example, the processability is not excellent in deformation characteristics such as softness and recovery. room for improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0126] The microglass fibers (average fiber diameter: 0.4 μm) were dispersed in ammonia water of pH 10 so that the concentration became 0.5% by weight, and the electrokinetic potential of the fiber surface was adjusted to -55 mv for treatment. Next, add 0.5 parts by weight of cationic surfactant (lauryl trimethyl ammonium chloride (trade name: Kohtamin 24P, manufactured by Kao Co., Ltd.)) based on 100 parts by weight of fibers in terms of the solid content of the surfactant. , And stir and mix. At this time, air is introduced to make it foam. The obtained wet foam was dried and treated at 450°C for 1 hour using an electric furnace to remove the surfactant adhering to the foam. Next, the coupling agent is supplied. The coupling agent uses methyltriethoxysilane (trade name: KBE-13, manufactured by Shin-Etsu Chemical Industry). Add the silane coupling agent to a closed container and heat it to about 160°C to generate vapor of the silane coupling agent. The foam is treated for 4...

Embodiment 2

[0152] Disperse ceramic fibers (approximately 50% by weight of alumina and about 50% by weight of silica) (average fiber diameter of 2.0μm) in ammonia water at pH 10 so that the concentration becomes 2% by weight, so that the electrokinetic potential on the fiber surface becomes -32mv . Next, 0.5 parts by weight of a cationic surfactant (lauryl trimethyl ammonium chloride (trade name: Kohtamin 24P, Kao Co., Ltd.) is added to 100 parts by weight of the fiber in terms of the solid content of the surfactant. Manufacturing)), and stir and mix. At this time, air is introduced to make it foam. In the same manner as in Example 1, the obtained foam was subjected to drying, firing, and coupling agent supply treatments. The average equivalent circle diameter of the pore diameter of the foam when it is not compressed at normal temperature is about 0.53 mm. In the same manner as in Example 1, the obtained foam was evaluated. The results are shown in Table 2.

Embodiment 3

[0154] Except that an anionic surfactant (sodium laurylbenzene sulfonate (trade name: NEOPELEX G65, manufactured by Kao Co., Ltd.)) was used instead of the cationic surfactant in Example 1, the same procedure as in Example 1 was carried out to produce hair Foam and evaluate. The results are shown in Table 3.

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Abstract

A soundproofing material comprises a porous body with a cell structure including inorganic fibers other than asbestos, the soundproofing material having an average cell diameter of more than 300 [Mu]mand not more than 1000 [Mu]m, a bulk density of 0.007 to 0.024 g / cm3, and a flow resistance of 170,000 to 2,000,000 Ns / m4.

Description

Technical field [0001] The present invention relates to a sound insulation material containing an inorganic fibrous porous body. Background technique [0002] The inorganic fibrous foam is produced by foaming an aqueous dispersion of inorganic fibers, molding the obtained bubble-containing aqueous dispersion, and then drying. Inorganic fibrous foam has elasticity similar to foamed polyurethane or foamed polyethylene, is lightweight, has excellent heat insulation and sound absorption properties, and is non-flammable. Therefore, it can be used in airplanes, rockets, ships, and automobiles. Heat insulation materials and / or sound absorbing materials for high-temperature parts of various other industrial equipment. [0003] As the inorganic fiber used to manufacture this foam, asbestos fiber has very excellent properties in terms of water dispersibility and flocculation, and is therefore most suitable. On the other hand, in recent years, it has been difficult to use asbestos fibers fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162B32B5/02B32B5/18C03C13/00C04B38/10G10K11/168
CPCC04B38/10G10K11/168C03C25/66C03C25/25C03C25/40C04B2111/52C04B2111/00612B32B2262/101B32B2266/10B32B2255/00B32B2262/105B32B2307/102B32B2250/22B32B5/18B32B2307/7242B32B2307/54B32B2266/057B32B5/32B32B2307/732B32B2307/72B32B2605/08C04B14/42C04B24/42C04B28/26C04B38/0054C04B38/0067C04B38/06C04B40/0028C04B41/00C04B2103/40B32B2255/102B32B2307/304B32B2605/00C03C13/00C03C17/001C03C2213/00C03C2217/70C04B41/009G10K11/162
Inventor 村山和贵塚原启二佐佐木光富塚悠马三木达郎安藤大介
Owner NICHIAS CORP
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