JPH074897B2 - Molded soundproofing material for automobiles - Google Patents
Molded soundproofing material for automobilesInfo
- Publication number
- JPH074897B2 JPH074897B2 JP22223892A JP22223892A JPH074897B2 JP H074897 B2 JPH074897 B2 JP H074897B2 JP 22223892 A JP22223892 A JP 22223892A JP 22223892 A JP22223892 A JP 22223892A JP H074897 B2 JPH074897 B2 JP H074897B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- fiber
- absorbing material
- sound
- sound absorbing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Laminated Bodies (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、吸音材と遮音性シート
とを一体化してなる自動車用成形防音材に関し、詳細に
は、該吸音材の繊維成分を特定した防音材となし、例え
ば、車室内とエンジンルームとを隔てるダッシュパネル
に装着して、エンジン騒音を防音する自動車用成形防音
材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molded soundproofing material for an automobile, which comprises a sound-absorbing material and a sound-insulating sheet integrated with each other. More specifically, it is a soundproofing material in which the fiber component of the sound-absorbing material is specified. The present invention relates to a molded soundproof material for automobiles, which is mounted on a dash panel that separates a vehicle interior from an engine room, to prevent engine noise.
【0002】[0002]
【従来の技術】従来より、例えば、自動車のエンジンル
ームと車室内を隔てるダッシュパネル等には、繊維原料
を嵩高性に加工したものを成形したり、フォーム材を成
形等してなる吸音材と遮音性シートが一体化して使用さ
れている。2. Description of the Related Art Conventionally, for example, in a dash panel or the like that separates an engine room and a vehicle interior of an automobile, a sound absorbing material formed by forming a bulk material of a fiber material or forming a foam material has been used. A sound-insulating sheet is used as a unit.
【0003】しかし、車室内のより一層の静寂化の要請
から更に優れた防音効果を有する成形防音材の開発が待
ち望まれているが、かかる目的を達成するために吸音材
の目付量を多くし、嵩高く形成する方法によれば、防音
効果の向上にはなるが、防音効果の向上に比例して防音
材自体の著しい重量の増加になり好ましくない。However, there is a long-awaited demand for the development of a molded soundproofing material having a further excellent soundproofing effect due to the demand for even quieter passenger compartments. In order to achieve such an object, the weight of the sound absorbing material is increased. Although the method of forming a bulky material improves the soundproofing effect, it is not preferable because the soundproofing material itself significantly increases in weight in proportion to the improvement of the soundproofing effect.
【0004】[0004]
【発明が解決しようとする課題】そこで、本発明は、吸
音材及び遮音材の目付量を全く増加せしめることなく、
全ての周波数領域において、要求される防音効果を満足
せしめる成形防音材を開発することを目的とする。SUMMARY OF THE INVENTION Therefore, according to the present invention, the weight per unit area of the sound absorbing material and the sound insulating material is not increased at all.
The purpose is to develop a molded soundproofing material that satisfies the required soundproofing effect in all frequency ranges.
【0005】[0005]
【課題を解決するための手段】かかる課題を解決せんと
して、本発明者らは鋭意研究の結果、吸音材を構成する
繊維成分の一定割合を特定の繊維原料に限定することに
より、全周波数領域において優れた防音効果を顕現し得
ることを見出すに至ったものであり、しかして本発明の
要旨は、以下に存する。[Means for Solving the Problems] As a solution to the above problems, the inventors of the present invention have conducted intensive studies and as a result, by limiting a certain proportion of the fiber components constituting the sound absorbing material to a specific fiber raw material, the whole frequency range is reduced. The present invention has revealed that an excellent soundproofing effect can be realized, and the gist of the present invention lies below.
【0006】繊維製吸音材として、使用繊維のうち80
重量%以上が綿からなる繊維製吸音材と遮音性シートと
を一体化してなることを特徴とする自動車用成形防音
材。As a sound absorbing material made of fiber, 80 of the used fibers are used.
A molded soundproofing material for automobiles, characterized in that a sound absorbing material made of fiber, which is made of cotton by weight% or more, and a sound insulating sheet are integrated.
【0007】本発明で使用する繊維製吸音材には、使用
繊維のうち80重量%以上を綿とすることを必須とし、
他の20重量%未満は、ガラスウール、麻、毛、ポリエ
ステル繊維、ナイロン繊維、レーヨン、アクリル繊維、
ポリプロピレン繊維、ポリエチレン繊維、カーボン繊
維、カイノール等の有機系、無機系の天然あるいは合成
繊維、各種の金属繊維等の使用が可能である。綿の使用
量が80重量%未満の場合、全周波数領域において一定
以上の優れた吸音性能が顕現し得ない虞れがあり好まし
くない。In the fiber sound absorbing material used in the present invention, it is essential that 80% by weight or more of the used fiber is cotton,
Other than less than 20% by weight is glass wool, hemp, wool, polyester fiber, nylon fiber, rayon, acrylic fiber,
It is possible to use organic or inorganic natural or synthetic fibers such as polypropylene fiber, polyethylene fiber, carbon fiber, kinol, and various metal fibers. If the amount of cotton used is less than 80% by weight, there is a possibility that a certain level or more of excellent sound absorbing performance may not be manifested in all frequency regions, which is not preferable.
【0008】従来の繊維製吸音材で使用される、衣料用
等に使用されていた織布を解繊してできる、いわゆる雑
反毛は、綿の含有率が30〜40重量%であり、該雑反
毛の使用量の3倍程度の重量の綿を混合し、全体として
80重量%以上の綿の使用量として用いる必要がある。[0008] The so-called fluff, which is formed by defibrating the woven cloth used for clothing and the like used in the conventional sound absorbing material made of fibers, has a cotton content of 30 to 40% by weight, It is necessary to mix cotton with a weight about three times as much as the used amount of the unwoven wool and to use it as a total amount of used cotton of 80% by weight or more.
【0009】本発明の成形防音材のうち繊維製吸音材を
製造する方法としては、従来公知の製造方法が利用でき
る。すなわち、繊維原料にフェノール樹脂等の熱硬化性
樹脂、あるいはポリエステル、ポリプロピレン等の熱可
塑性樹脂を混合してフリースを形成し、加熱してセミキ
ュア状態の嵩高性原反を製造する。これを適当な大きさ
に裁断し、任意の形状に成形するために成形型の上に載
置して、加圧成形若しくは加熱加圧成形することにより
繊維製吸音材が得られる。Among the molded soundproofing materials of the present invention, a conventionally known manufacturing method can be used as a method for manufacturing the fiber sound absorbing material. That is, a fibrous raw material is mixed with a thermosetting resin such as phenol resin or a thermoplastic resin such as polyester or polypropylene to form a fleece, which is then heated to produce a semi-cured bulky fabric. A fibrous sound absorbing material is obtained by cutting this into an appropriate size, placing it on a molding die for molding into an arbitrary shape, and performing pressure molding or heat pressure molding.
【0010】加圧成形等する際に、合成ゴム、天然ゴ
ム、再生ゴム等のゴムや、瀝青質物、合成樹脂等のバイ
ンダーに必要に応じ体質顔料、添加剤等の充填剤を配合
し、混練、圧延、シート化した遮音性能に優れた遮音材
に積層し、同時に成形する事も可能であり、優れた吸音
性能及び遮音性能を有する防音材となし得る。When pressure molding or the like, rubber such as synthetic rubber, natural rubber or recycled rubber, binder such as bituminous material or synthetic resin, if necessary, is mixed with filler such as extender pigment and additive, and kneaded. It is also possible to form a soundproof material having excellent sound absorption performance and sound insulation performance by laminating it on a sound insulation material having excellent sound insulation performance that has been rolled and formed into a sheet and molding at the same time.
【0011】[0011]
【実施例】本発明の理解に供するため、以下に実施例を
記載する。いうまでもなく、本発明は以下の実施例に限
定されるものではない。EXAMPLES In order to understand the present invention, examples will be described below. Needless to say, the present invention is not limited to the examples below.
【0012】[0012]
【実施例1】綿100重量%の繊維原料にフェノール樹
脂を混合してフリースと成したあと加熱してセミキュア
状態とし、適当な大きさに裁断して繊維製吸音材の原反
を製造した。該繊維製吸音材の原反を200℃に加熱し
た下金型上に載置して上金型を降下せしめ、100kg
/cm2 にて1分間、加熱加圧成形し、面重量1000
g/m2の繊維製吸音材の成形物を作成した。ブチルゴ
ム40重量部、ブロンアスファルト5重量部、炭酸カル
シウム50重量部及びタルク5重量部を混練し、3mm
厚に押出し成形し、遮音性シートとなした。該遮音性シ
ートを100℃で1分間プレヒートした後、5℃に冷却
した下金型上に載置後真空成形した。遮音性シートの真
空成形物の上に接着剤を介して上記繊維製吸音材の成形
物を載置して上金型を降下せしめ、100kg/cm2
にて30秒間加圧成形し、面重量5500g/m2 の自
動車用成形防音材1を得た。Example 1 A raw material of a sound absorbing material made of fibers was manufactured by mixing a fiber raw material of 100% by weight of cotton with a phenol resin to form a fleece, heating it into a semi-cure state, and cutting it into an appropriate size. The raw material of the fiber sound absorbing material is placed on a lower mold heated to 200 ° C. and the upper mold is lowered to 100 kg.
Heat / press molding for 1 minute at a surface weight of 1000 / cm 2 .
A molded product of a fiber sound absorbing material having a weight of g / m 2 was prepared. Kneaded 40 parts by weight of butyl rubber, 5 parts by weight of blown asphalt, 50 parts by weight of calcium carbonate and 5 parts by weight of talc, and 3 mm
It was extruded to a thick thickness to form a sound insulating sheet. The sound insulation sheet was preheated at 100 ° C. for 1 minute, placed on a lower mold cooled to 5 ° C., and vacuum formed. The above-mentioned molded product of the sound absorbing material made of fiber is placed on the vacuum molded product of the sound insulation sheet via an adhesive, and the upper mold is lowered to 100 kg / cm 2.
Was pressure-molded for 30 seconds to obtain an automobile molded soundproofing material 1 having a surface weight of 5500 g / m 2 .
【0013】[0013]
【実施例2】綿80重量%及びポリエステル繊維20重
量%からなる混合繊維原料にフェノール樹脂を混合して
フリースと成したあと加熱してセミキュア状態とし、適
当な大きさに裁断して繊維製吸音材の原反を製造した。
該繊維製吸音材の原反を180℃で1分間プレヒートし
た後、5℃に冷却した下金型上に載置して上金型を降下
せしめ、100kg/cm2 にて1分間、冷却加圧成形
し、面重量1000g/m2の繊維製吸音材の成形物を
作成した。ブチルゴム40重量部、ブロンアスファルト
5重量部、炭酸カルシウム50重量部及びタルク5重量
部を混練し、3mm厚に押出し成形し、遮音性シートと
なした。該遮音性シートを100℃で1分間プレヒート
した後、5℃に冷却した下金型上に載置後真空成形し
た。遮音性シートの真空成形物の上に接着剤を介して上
記繊維製吸音材の成形物を載置して上金型を降下せし
め、100kg/cm2にて30秒間加圧成形し、面重
量5500g/m2 の自動車用成形防音材2を得た。Example 2 A phenolic resin was mixed with a mixed fiber raw material consisting of 80% by weight of cotton and 20% by weight of polyester fiber to form a fleece, which was then heated to a semi-cure state and cut into an appropriate size to absorb the sound of the fiber. A raw material was manufactured.
The raw material of the fiber sound absorbing material is preheated at 180 ° C. for 1 minute, then placed on the lower mold cooled to 5 ° C. to lower the upper mold, and cooled at 100 kg / cm 2 for 1 minute. Pressure molding was performed to prepare a molded product of a fiber sound absorbing material having a surface weight of 1000 g / m 2 . 40 parts by weight of butyl rubber, 5 parts by weight of blown asphalt, 50 parts by weight of calcium carbonate and 5 parts by weight of talc were kneaded and extruded to a thickness of 3 mm to obtain a sound insulating sheet. The sound insulation sheet was preheated at 100 ° C. for 1 minute, placed on a lower mold cooled to 5 ° C., and vacuum formed. Place the above-mentioned molded product of the sound absorbing material made of fiber through the adhesive on the vacuum molded product of the sound insulation sheet, lower the upper mold, and press-mold at 100 kg / cm 2 for 30 seconds to obtain a surface weight. A molded soundproofing material 2 for automobile having a weight of 5500 g / m 2 was obtained.
【0014】[0014]
【実施例3】綿85重量%、羊毛5重量%、ガラスウー
ル5重量%及びポリエステル繊維5重量%からなる混合
繊維原料にフェノール樹脂を混合してフリースと成した
あと加熱してセミキュア状態とし、適当な大きさに裁断
して繊維製吸音材の原反を製造した。該繊維製吸音材の
原反を200℃に加熱した下金型上に載置して上金型を
降下せしめ、100kg/cm2 にて1分間、加熱加圧
成形し、面重量1000g/m2の繊維製吸音材の成形
物を作成した。ブチルゴム40重量部、ブロンアスファ
ルト5重量部、炭酸カルシウム50重量部及びタルク5
重量部を混練し、3mm厚に押出し成形し、遮音性シー
トとなした。該遮音性シートを100℃で1分間プレヒ
ートした後、5℃に冷却した下金型上に載置後真空成形
した。遮音性シートの真空成形物の上に接着剤を介して
上記繊維製吸音材の成形物を載置して上金型を降下せし
め、100kg/cm2にて30秒間加圧成形し、面重
量5500g/m2 の自動車用成形防音材3を得た。Example 3 A phenolic resin was mixed with a mixed fiber raw material consisting of 85% by weight of cotton, 5% by weight of wool, 5% by weight of glass wool and 5% by weight of polyester fiber to form a fleece, which was then heated to a semi-cured state. A fiber sound absorbing material was produced by cutting it into a suitable size. The raw material of the sound absorbing material made of fiber is placed on a lower mold heated to 200 ° C. to lower the upper mold, and heated and pressed at 100 kg / cm 2 for 1 minute to obtain a surface weight of 1000 g / m 2. A molded article of the fiber sound absorbing material of 2 was prepared. Butyl rubber 40 parts by weight, blown asphalt 5 parts by weight, calcium carbonate 50 parts by weight and talc 5
A part by weight was kneaded and extruded to a thickness of 3 mm to form a sound insulating sheet. The sound insulation sheet was preheated at 100 ° C. for 1 minute, placed on a lower mold cooled to 5 ° C., and vacuum formed. Place the above-mentioned molded product of the sound absorbing material made of fiber through the adhesive on the vacuum molded product of the sound insulation sheet, lower the upper mold, and press-mold at 100 kg / cm 2 for 30 seconds to obtain a surface weight. A molded soundproofing material 3 for automobile of 5500 g / m 2 was obtained.
【0015】[0015]
【実施例4】綿80重量%、羊毛5重量%、ガラスウー
ル5重量%及びポリエステル繊維10重量%からなる混
合繊維原料にフェノール樹脂を混合してフリースと成し
たあと加熱してセミキュア状態とし、適当な大きさに裁
断して繊維製吸音材の原反を製造した。該繊維製吸音材
の原反を200℃に加熱した下金型上に載置して上金型
を降下せしめ、100kg/cm2 にて1分間、加熱加
圧成形し、面重量1000g/m2の繊維製吸音材の成
形物を作成した。ブチルゴム40重量部、ブロンアスフ
ァルト5重量部、炭酸カルシウム50重量部及びタルク
5重量部を混練し、3mm厚に押出し成形し、遮音性シ
ートとなした。該遮音性シートを100℃で1分間プレ
ヒートした後、5℃に冷却した下金型上に載置後真空成
形した。遮音性シートの真空成形物の上に接着剤を介し
て上記繊維製吸音材の成形物を載置して上金型を降下せ
しめ、100kg/cm2にて30秒間加圧成形し、面
重量5500g/m2 の自動車用成形防音材4を得た。Example 4 Phenolic resin was mixed with a mixed fiber raw material consisting of 80% by weight of cotton, 5% by weight of wool, 5% by weight of glass wool and 10% by weight of polyester fiber to form a fleece, which was then heated to a semi-cured state. A fiber sound absorbing material was produced by cutting it into a suitable size. The raw material of the sound absorbing material made of fiber is placed on a lower mold heated to 200 ° C. to lower the upper mold, and heated and pressed at 100 kg / cm 2 for 1 minute to obtain a surface weight of 1000 g / m 2. A molded article of the fiber sound absorbing material of 2 was prepared. 40 parts by weight of butyl rubber, 5 parts by weight of blown asphalt, 50 parts by weight of calcium carbonate and 5 parts by weight of talc were kneaded and extruded to a thickness of 3 mm to obtain a sound insulating sheet. The sound insulation sheet was preheated at 100 ° C. for 1 minute, placed on a lower mold cooled to 5 ° C., and vacuum formed. Place the above-mentioned molded product of the sound absorbing material made of fiber through the adhesive on the vacuum molded product of the sound insulation sheet, lower the upper mold, and press-mold at 100 kg / cm 2 for 30 seconds to obtain a surface weight. 5500 g / m 2 of molded automobile soundproofing material 4 was obtained.
【0016】[0016]
【比較例1】綿60重量%及びポリエステル繊維40重
量%からなる混合繊維原料にフェノール樹脂を混合して
フリースと成したあと加熱してセミキュア状態とし、適
当な大きさに裁断して繊維製吸音材の原反を製造した。
該繊維製吸音材の原反を200℃に加熱した下金型上に
載置して上金型を降下せしめ、100kg/cm2 にて
1分間、加熱加圧成形し、面重量1000g/m2の繊
維製吸音材の成形物を作成した。ブチルゴム40重量
部、ブロンアスファルト5重量部、炭酸カルシウム50
重量部及びタルク5重量部を混練し、3mm厚に押出し
成形し、遮音性シートとなした。該遮音性シートを10
0℃で1分間プレヒートした後、5℃に冷却した下金型
上に載置後真空成形した。遮音性シートの真空成形物の
上に接着剤を介して上記繊維製吸音材の成形物を載置し
て上金型を降下せしめ、100kg/cm2にて30秒
間加圧成形し、面重量5500g/m2 の自動車用成形
防音材5を得た。[Comparative Example 1] A phenolic resin was mixed with a mixed fiber raw material consisting of 60% by weight of cotton and 40% by weight of polyester fiber to form a fleece, which was then heated to a semi-cure state and cut into an appropriate size to absorb the sound of the fiber. A raw material was manufactured.
The raw material of the sound absorbing material made of fiber is placed on a lower mold heated to 200 ° C. to lower the upper mold, and heated and pressed at 100 kg / cm 2 for 1 minute to obtain a surface weight of 1000 g / m 2. A molded article of the fiber sound absorbing material of 2 was prepared. Butyl rubber 40 parts by weight, blown asphalt 5 parts by weight, calcium carbonate 50
Parts by weight and 5 parts by weight of talc were kneaded and extruded to a thickness of 3 mm to obtain a sound insulating sheet. 10 sound-insulating sheets
After preheating at 0 ° C. for 1 minute, it was placed on a lower mold cooled to 5 ° C. and vacuum formed. Place the above-mentioned molded product of the sound absorbing material made of fiber through the adhesive on the vacuum molded product of the sound insulation sheet, lower the upper mold, and press-mold at 100 kg / cm 2 for 30 seconds to obtain a surface weight. A molded soundproofing material 5 for automobile having a weight of 5500 g / m 2 was obtained.
【0017】[0017]
【比較例2】綿40重量%、ガラスウール10重量%及
びポリエステル繊維50重量%からなる混合繊維原料に
フェノール樹脂を混合してフリースと成したあと加熱し
てセミキュア状態とし、適当な大きさに裁断して繊維製
吸音材の原反を製造した。該繊維製吸音材の原反を18
0℃で1分間プレヒートした後、5℃に冷却した下金型
上に載置して上金型を降下せしめ、100kg/cm2
にて1分間、冷却加圧成形し、面重量1000g/m2
の繊維製吸音材の成形物を作成した。ブチルゴム40重
量部、ブロンアスファルト5重量部、炭酸カルシウム5
0重量部及びタルク5重量部を混練し、3mm厚に押出
し成形し、遮音性シートとなした。該遮音性シートを1
00℃で1分間プレヒートした後、5℃に冷却した下金
型上に載置後真空成形した。遮音性シートの真空成形物
の上に接着剤を介して上記繊維製吸音材の成形物を載置
して上金型を降下せしめ、100kg/cm2にて30
秒間加圧成形し、面重量5500g/m2 の自動車用成
形防音材6を得た。Comparative Example 2 Phenolic resin is mixed with a mixed fiber raw material composed of 40% by weight of cotton, 10% by weight of glass wool and 50% by weight of polyester fiber to form a fleece, which is then heated to a semi-cure state and made into an appropriate size. The raw material of the sound absorbing material made of fiber was manufactured by cutting. 18 sheets of the fiber sound absorbing material
After preheating at 0 ° C for 1 minute, it was placed on the lower mold cooled to 5 ° C and the upper mold was lowered to 100 kg / cm 2.
At room temperature for 1 minute, cooling and pressure molding, surface weight 1000g / m 2
A molded article of the sound absorbing material made of fiber was produced. Butyl rubber 40 parts by weight, blown asphalt 5 parts by weight, calcium carbonate 5
0 parts by weight and 5 parts by weight of talc were kneaded and extruded to a thickness of 3 mm to obtain a sound insulating sheet. 1 sound insulation sheet
After preheating at 00 ° C. for 1 minute, it was placed on a lower mold cooled to 5 ° C. and vacuum formed. On the vacuum molded product of the sound insulation sheet, the molded product of the sound absorbing material made of fiber is placed via an adhesive, and the upper mold is lowered to 30 at 100 kg / cm 2 .
The molded soundproofing material 6 for automobiles having a surface weight of 5500 g / m 2 was obtained by pressure molding for 2 seconds.
【0018】[0018]
【試験方法】自動車用成形防音材1〜6の各周波数にお
ける防音効果を測定した。[Test method] The soundproofing effect at each frequency of the molded soundproofing materials for automobiles 1 to 6 was measured.
【0019】[0019]
【結果1】試験結果を表1に示す。表中の単位はdBで
ある。数字が大きいほど防音効果が高い。[Result 1] The test results are shown in Table 1. The unit in the table is dB. The larger the number, the higher the soundproofing effect.
【表1】 [Table 1]
【0021】[0021]
【発明の効果】本発明になる成形防音材は、全ての周波
数領域において要求されている防音効果を満足するもの
であることが明らかになった。EFFECTS OF THE INVENTION It has been clarified that the molded soundproofing material according to the present invention satisfies the soundproofing effect required in all frequency regions.
Claims (1)
0重量%以上が綿からなる繊維製吸音材と遮音性シート
とを一体化してなることを特徴とする自動車用成形防音
材。1. As a sound absorbing material made of fiber, 8 of the used fibers are used.
A molded soundproofing material for automobiles, characterized in that a sound absorbing material made of fiber made of 0% by weight or more of cotton and a sound insulating sheet are integrated.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22223892A JPH074897B2 (en) | 1992-07-30 | 1992-07-30 | Molded soundproofing material for automobiles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22223892A JPH074897B2 (en) | 1992-07-30 | 1992-07-30 | Molded soundproofing material for automobiles |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0647852A JPH0647852A (en) | 1994-02-22 |
JPH074897B2 true JPH074897B2 (en) | 1995-01-25 |
Family
ID=16779276
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22223892A Expired - Lifetime JPH074897B2 (en) | 1992-07-30 | 1992-07-30 | Molded soundproofing material for automobiles |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH074897B2 (en) |
-
1992
- 1992-07-30 JP JP22223892A patent/JPH074897B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0647852A (en) | 1994-02-22 |
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