JP2005263118A - Sound absorbing material for vehicle - Google Patents

Sound absorbing material for vehicle Download PDF

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Publication number
JP2005263118A
JP2005263118A JP2004081263A JP2004081263A JP2005263118A JP 2005263118 A JP2005263118 A JP 2005263118A JP 2004081263 A JP2004081263 A JP 2004081263A JP 2004081263 A JP2004081263 A JP 2004081263A JP 2005263118 A JP2005263118 A JP 2005263118A
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sound absorbing
sound
absorbing material
vehicle
air permeability
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Shuichi Mizata
修一 見座田
Shinobu Fushiki
忍 伏木
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Howa Co Ltd
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Howa Textile Industry Co Ltd
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  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound absorbing material for a vehicle having an excellent sound absorbing performance without increasing the thickness and the bulk specific gravity so as to obtain uniform permeability through the whole area. <P>SOLUTION: The sound absorbing material for the vehicle is constituted so that a laminated body having an air permeability of 1 to 25 cc/cm<SP>2</SP>/sec and a unit weight of 100 to 2000 g/m<SP>2</SP>is formed by thermally fusing fiber nonwoven fabric or resin film 2 having the air permeability of 100 to 300 cc/cm<SP>2</SP>/sec and the unit weight of 15 to 200 g/m<SP>2</SP>which is made of thermoplastic synthetic resin such as polypropylene, polyethylene, polyester, and polystyrene or the like to a sound absorbing layer 1 made of a porous material such as felt, glass wool, and urethane foam or the like. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は自動車の車体内側に配置しエンジン音等の侵入を防ぐ車輌用吸音材に関するものである。   The present invention relates to a sound absorbing material for a vehicle that is disposed inside a car body of an automobile and prevents intrusion of engine sound or the like.

エンジンルームからの騒音の侵入を防ぐため自動車のダッシュパネルの室内面に装着される自動車用インシュレータは、下記特許文献１等に開示されたように、従来から繊維集合体である吸音層と表皮層とからなる二層構造のものが知られている。
また、下記特許文献２に示された吸音シート積層体は、紙、織物または不織布からなるシート状下地に合成ゴム系樹脂を塗布または含浸し、これを吸音材本体に接着、積層してなるものであった。
特開２００２−２２０００９号公報 特開２０００−１１２４８２号公報 Insulators for automobiles mounted on the interior surface of a dash panel of an automobile in order to prevent intrusion of noise from an engine room, as disclosed in the following Patent Document 1 and the like, a sound absorption layer and a skin layer that are conventionally fiber assemblies The thing of the two-layer structure which consists of is known.
In addition, the sound absorbing sheet laminate shown in Patent Document 2 below is obtained by applying or impregnating a synthetic rubber resin to a sheet-like base made of paper, woven fabric or non-woven fabric, and bonding and laminating this to the sound absorbing material body. Met.
Japanese Patent Laid-Open No. 2002-220009 JP 2000-112482 A

しかし従来の車輌用吸音材は、吸音性能を高めるために厚さや嵩比重を増やさなければならず、そのために重量が増したり配置スペースが大きく必要となるものであった。
また、従来の多層型吸音材では、層間の接着剤となる合成ゴム系樹脂等の塗布量等が不均一となり、全面を通して均一な通気性を得ることが困難であったので、十分な吸音性能が発揮されない問題があった。 However, the conventional sound absorbing material for vehicles has to increase the thickness and bulk specific gravity in order to improve the sound absorbing performance. For this reason, the weight increases and a large arrangement space is required.
In addition, with conventional multilayer sound-absorbing materials, the application amount of synthetic rubber-based resin, etc., which serves as an adhesive between layers, has become uneven, and it has been difficult to obtain uniform air permeability throughout the entire surface. There was a problem that could not be demonstrated.

本発明の車輌用吸音材は上記課題を解決しようとするもので、フエルト，グラスウール，ウレタンフォーム等の多孔質材からなる吸音層に、ポリプロピレン，ポリエチレン，ポリエステル，ポリスチレン等の熱可塑性合成樹脂からなる目付１５〜２００ｇ／ｍ２の繊維性不織布または樹脂膜を熱融着することにより、通気度が１〜２５ｃｃ／ｃｍ２／ｓｅｃとなる積層体を形成してなることを特徴とする。 The vehicle sound-absorbing material of the present invention is intended to solve the above-mentioned problems, and is composed of a thermoplastic synthetic resin such as polypropylene, polyethylene, polyester, and polystyrene on a sound-absorbing layer made of a porous material such as felt, glass wool, and urethane foam. A laminate having a permeability of 1 to 25 cc / cm 2 / sec is formed by heat-sealing a fibrous nonwoven fabric or resin film having a basis weight of 15 to 200 g / m 2 .

全面を通して均一な通気性が得られることから、厚さや嵩比重を増すことなく優れた吸音性能が発揮される。   Since uniform air permeability is obtained throughout the entire surface, excellent sound absorbing performance is exhibited without increasing the thickness and bulk specific gravity.

この車輌用吸音材は、図１〜図３に例示するように、吸音層１と繊維性不織布（または樹脂膜）２とからなる。吸音層１は、フエルト，グラスウール，ウレタンフォーム等の多孔質材からなる厚手のものである。また、繊維性不織布２はポリプロピレン，ポリエチレン，ポリエステル，ポリスチレン等の熱可塑性合成樹脂からなり、その通気度は１００〜３００ｃｃ／ｃｍ２／ｓｅｃ、目付は１５〜２００ｇ／ｍ２なるものである。 This vehicle sound-absorbing material comprises a sound-absorbing layer 1 and a fibrous nonwoven fabric (or resin film) 2 as illustrated in FIGS. The sound absorbing layer 1 is a thick layer made of a porous material such as felt, glass wool, or urethane foam. The fibrous nonwoven fabric 2 is made of a thermoplastic synthetic resin such as polypropylene, polyethylene, polyester, or polystyrene, and has an air permeability of 100 to 300 cc / cm 2 / sec and a basis weight of 15 to 200 g / m 2 .

上記吸音層１上に繊維性不織布２を重ね合わせてオーブン（図示せず）内を通過させることにより、１２０〜１８０℃の熱風に３０〜１２０秒間さらし、繊維性不織布２を半溶融状態として吸音層１上に熱融着させる。こうして製造された積層体は、図２に示したように、繊維性不織布２の網目が溶融によって適度に詰まることにより、その通気度が１〜２５ｃｃ／ｃｍ２／ｓｅｃとなり、目付は１００〜２０００ｇ／ｍ２となる。なお、製造に際しては、吸音層１を成形する際の加熱時に繊維性不織布２を重ね合わせておくことで、該繊維性不織布２を簡単に熱融着させることができる。 The fibrous nonwoven fabric 2 is overlaid on the sound absorbing layer 1 and passed through an oven (not shown), so that it is exposed to hot air of 120 to 180 ° C. for 30 to 120 seconds to make the fibrous nonwoven fabric 2 in a semi-molten state and absorb sound. It is heat-sealed on the layer 1. As shown in FIG. 2, the laminate thus produced has an air permeability of 1 to 25 cc / cm 2 / sec when the mesh of the fibrous nonwoven fabric 2 is appropriately clogged by melting, and the basis weight is 100 to 2000 g. / M 2 . In addition, at the time of manufacture, the fibrous nonwoven fabric 2 can be easily heat-sealed by superimposing the fibrous nonwoven fabric 2 at the time of heating when forming the sound absorbing layer 1.

このように、熱融着により通気度を１〜２５ｃｃ／ｃｍ２／ｓｅｃとなるように低下させることにより、該繊維性不織布２の通気性を全面にわたり略々均一なものとすることができる。即ち、熱融着前に通気度が１００〜３００ｃｃ／ｃｍ２／ｓｅｃであった繊維性不織布２を熱融着によりその積層体の通気度を１〜２０ｃｃ／ｃｍ２／ｓｅｃに低下させたことで、この車輌用吸音材の全面にわたる通気度を均一に保つことができる。このため、一定面積を持つ車輌用吸音材について優れた吸音性能を発揮することができる。なお、繊維性不織布２は樹脂膜、即ち、多孔性の樹脂フィルム状の形態のものを使用することもできる。 Thus, the air permeability of the fibrous nonwoven fabric 2 can be made substantially uniform over the entire surface by reducing the air permeability to 1 to 25 cc / cm 2 / sec by heat fusion. That is, the air permeability of the laminate was reduced to 1 to 20 cc / cm 2 / sec by heat-sealing the fibrous nonwoven fabric 2 having an air permeability of 100 to 300 cc / cm 2 / sec before heat fusion. Thus, the air permeability over the entire surface of the vehicle sound absorbing material can be kept uniform. For this reason, the sound-absorbing performance excellent about the sound-absorbing material for vehicles which has a fixed area can be exhibited. The fibrous nonwoven fabric 2 may be a resin film, that is, a porous resin film.

なお、繊維性不織布２の目付を１５ｇ／ｍ２以下とすると、目付の部分的なバラツキが大きいことや、熱遊着後通気度を少なくする機能が果たせなくなる障害がある。また、繊維性不織布２の目付を２００ｇ／ｍ２以上とすると、熱遊着後の樹脂膜がかえって吸音性を損なうことや、重量、工程、コストが増すおそれがある。このため繊維性不織布２の目付は１５〜２００ｇ／ｍ２とするのが望ましい。 In addition, when the basis weight of the fibrous nonwoven fabric 2 is 15 g / m 2 or less, there is a problem that a partial variation in the basis weight is large and the function of reducing the air permeability after heat adhesion cannot be performed. On the other hand, if the basis weight of the fibrous nonwoven fabric 2 is 200 g / m 2 or more, the resin film after thermal adhesion may be changed to impair sound absorption, and the weight, process, and cost may increase. Therefore, the basis weight of the fibrous nonwoven fabric 2 is desirably 15 to 200 g / m 2 .

表１は本発明の実施例および比較例を示すもので、そのＮＯ１−１として再生ＰＥＴフェルト（ポリエチレンテレフタレート）からなる目付５００ｇ／ｍ２の吸音層に目付が５０ｇ／ｍ２で通気度が４ｃｃ／ｃｍ２／ｓｅｃの繊維性不織布を熱融着したもの、ＮＯ１−２としてその繊維性不織布の通気度を６ｃｃ／ｃｍ２／ｓｅｃとしたもの、ＮＯ１−３として繊維性不織布を融着してないものを示し、その各車輌用吸音材の吸音率の測定結果を図４に示す。なお、測定は、日本工業規格（ＪＩＳ Ａ １４０５）で定められた垂直入射吸音率測定方法に従って行った。

Figure 2005263118
Table 1 shows examples and comparative examples of the present invention. As NO1-1, a sound absorption layer having a basis weight of 500 g / m 2 made of recycled PET felt (polyethylene terephthalate) has a basis weight of 50 g / m 2 and an air permeability of 4 cc. / Cm 2 / sec fiber non-woven fabric heat-sealed, NO1-2 as the air permeability of the fibrous non-woven fabric was 6 cc / cm 2 / sec, NO1-3 fibrous non-woven fabric was fused FIG. 4 shows the measurement results of the sound absorption coefficient of each vehicle sound absorbing material. In addition, the measurement was performed according to the normal incident sound absorption coefficient measuring method defined in Japanese Industrial Standard (JIS A 1405).
Figure 2005263118

また、比較例である表１のＮＯ２−１およびＮＯ２−２は、上記吸音層の目付を８００ｇ／ｍ２とし、繊維性不織布の通気度を６ｃｃ／ｃｍ２／ｓｅｃおよび１２ｃｃ／ｃｍ２／ｓｅｃとしたもの、同じくＮＯ２−３は同吸音層で繊維性不織布を融着してないものを示し、これらの吸音率の測定結果を図５に示した。このように、本発明に係る車輌用吸音材はいずれも高い吸音性能を発揮することができた。 Moreover, NO2-1 and NO2-2 of Table 1 which are comparative examples set the basis weight of the sound absorption layer to 800 g / m 2, and the air permeability of the fibrous nonwoven fabric is 6 cc / cm 2 / sec and 12 cc / cm 2 / sec. In the same manner, NO2-3 was the same sound-absorbing layer and the fibrous nonwoven fabric was not fused, and the measurement results of these sound-absorbing rates are shown in FIG. Thus, any of the vehicle sound absorbing materials according to the present invention can exhibit high sound absorbing performance.

本発明に係る車輌用吸音材を構成する吸音層と繊維性不織布の斜視図。The perspective view of the sound-absorption layer and fibrous nonwoven fabric which comprise the sound-absorbing material for vehicles which concerns on this invention. 本発明に係る車輌用吸音材の斜視図。The perspective view of the sound-absorbing material for vehicles which concerns on this invention. 本発明に係る車輌用吸音材の縦断面図。The longitudinal cross-sectional view of the sound-absorbing material for vehicles which concerns on this invention. 本発明に係る車輌用吸音材の吸音率測定グラフ。The sound absorption coefficient measurement graph of the sound-absorbing material for vehicles which concerns on this invention. 本発明に係る車輌用吸音材の吸音率測定グラフ。The sound absorption coefficient measurement graph of the sound-absorbing material for vehicles which concerns on this invention.

符号の説明Explanation of symbols

１ 吸音層
２ 繊維性不織布（または樹脂膜） 1 Sound absorption layer 2 Fibrous nonwoven fabric (or resin film)

Claims (1)

フエルト，グラスウール，ウレタンフォーム等の多孔質材からなる吸音層に、ポリプロピレン，ポリエチレン，ポリエステル，ポリスチレン等の熱可塑性合成樹脂からなる目付１５〜２００ｇ／ｍ２の繊維性不織布または樹脂膜を熱融着することにより、通気度が１〜２５ｃｃ／ｃｍ２／ｓｅｃとなる積層体を形成してなることを特徴とした車輌用吸音材。 A fibrous non-woven fabric or resin film having a basis weight of 15 to 200 g / m 2 made of a thermoplastic synthetic resin such as polypropylene, polyethylene, polyester or polystyrene is heat-sealed to a sound absorbing layer made of a porous material such as felt, glass wool or urethane foam. By doing so, a vehicle sound-absorbing material, wherein a laminated body having an air permeability of 1 to 25 cc / cm 2 / sec is formed.
JP2004081263A 2004-03-19 2004-03-19 Sound absorbing material for vehicle Pending JP2005263118A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100903361B1 (en) 2009-03-31 2009-06-23 주식회사 우진테크 Pad for reducing car noize
US7694779B2 (en) * 2003-08-25 2010-04-13 Takayasu Co., Ltd. Sound absorbing material
CN101471070B (en) * 2007-09-24 2011-04-27 龙云刚 High-performance acoustical material and method for producing the same
JP2016084104A (en) * 2014-10-29 2016-05-19 林テレンプ株式会社 Interior material for automobile, and method for manufacturing the same
WO2016121468A1 (en) * 2015-01-30 2016-08-04 株式会社オートネットワーク技術研究所 Sound-absorbing material, and wiring harness with sound-absorbing material
WO2016121467A1 (en) * 2015-01-30 2016-08-04 株式会社オートネットワーク技術研究所 Sound-absorbing material and wiring harness with sound-absorbing material
JP2017037173A (en) * 2015-08-10 2017-02-16 東レ株式会社 Sound absorbing felt
WO2022163621A1 (en) * 2021-01-26 2022-08-04 東洋紡株式会社 Sound-absorbing material and method for producing same

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7694779B2 (en) * 2003-08-25 2010-04-13 Takayasu Co., Ltd. Sound absorbing material
CN101471070B (en) * 2007-09-24 2011-04-27 龙云刚 High-performance acoustical material and method for producing the same
KR100903361B1 (en) 2009-03-31 2009-06-23 주식회사 우진테크 Pad for reducing car noize
JP2016084104A (en) * 2014-10-29 2016-05-19 林テレンプ株式会社 Interior material for automobile, and method for manufacturing the same
US10618251B2 (en) 2015-01-30 2020-04-14 Autonetworks Technologies, Ltd. Sound-absorbing material and wire harness provided with sound-absorbing material
WO2016121467A1 (en) * 2015-01-30 2016-08-04 株式会社オートネットワーク技術研究所 Sound-absorbing material and wiring harness with sound-absorbing material
JP2016142830A (en) * 2015-01-30 2016-08-08 株式会社オートネットワーク技術研究所 Sound absorbing material and wire harness having sound absorbing material
JP2016142831A (en) * 2015-01-30 2016-08-08 株式会社オートネットワーク技術研究所 Sound absorber and sound-absorber-equipped wire harness
CN107251135A (en) * 2015-01-30 2017-10-13 株式会社自动网络技术研究所 Sound-absorbing material and the wire harness with sound-absorbing material
CN107851430A (en) * 2015-01-30 2018-03-27 株式会社自动网络技术研究所 Sound-absorbing material and the wire harness with sound-absorbing material
US10583627B2 (en) 2015-01-30 2020-03-10 Autonetworks Technologies, Ltd. Sound-absorbing material and wire harness provided with sound-absorbing material
WO2016121468A1 (en) * 2015-01-30 2016-08-04 株式会社オートネットワーク技術研究所 Sound-absorbing material, and wiring harness with sound-absorbing material
JP2017037173A (en) * 2015-08-10 2017-02-16 東レ株式会社 Sound absorbing felt
JP7032032B2 (en) 2015-08-10 2022-03-08 東レ株式会社 Sound absorbing felt
WO2022163621A1 (en) * 2021-01-26 2022-08-04 東洋紡株式会社 Sound-absorbing material and method for producing same
JP7142189B1 (en) * 2021-01-26 2022-09-26 東洋紡株式会社 SOUND ABSORBING MATERIAL AND METHOD FOR MANUFACTURING SOUND ABSORBING MATERIAL

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