JP2005041126A - Laminated fiber sheet - Google Patents

Laminated fiber sheet Download PDF

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JP2005041126A
JP2005041126A JP2003278284A JP2003278284A JP2005041126A JP 2005041126 A JP2005041126 A JP 2005041126A JP 2003278284 A JP2003278284 A JP 2003278284A JP 2003278284 A JP2003278284 A JP 2003278284A JP 2005041126 A JP2005041126 A JP 2005041126A
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fiber
fibers
laminated
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fiber sheet
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Taku Ishimaru
卓 石丸
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Sun Chemical Corp
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Sun Chemical Corp
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<P>PROBLEM TO BE SOLVED: To provide a laminated fiber sheet which can improve a sound insulation effect. <P>SOLUTION: The laminated fiber sheet 1 is composed of a substrate 2 and skin materials 3A and 3B which are adhered to one side or both sides of the substrate 2. In the substrate 2, fiber layers 2A, 2B, and 2C are laminated thinly on the surface side and densely on the back side. The sound insulation is effected by the high density part of each fiber layer 2A, 2B, or 2C, and the sound absorption is carried out by the low density part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、例えば自動車、建築物、道路等の防音材として有用な積層繊維シートに関するものである。   The present invention relates to a laminated fiber sheet useful as a soundproofing material for automobiles, buildings, roads, and the like.

例えば、鉄道や道路等の防音壁に取付ける繊維シートとしては、見掛け密度０．０１ｇ／cm3 以上の有機繊維不織布からなる芯材層の片面または両面に見掛け密度０．０５ｇ／cm3 以上の有機繊維不織布からなる表皮層を積層した積層繊維シートが使用されている（例えば特許文献１参照）。 For example, the fiber sheet attached to the sound barrier, such as railways, roads, apparent density apparent to one or both sides of 0.01 g / cm 3 or more core layer made of an organic fiber nonwoven fabric density 0.05 g / cm 3 or more organic A laminated fiber sheet obtained by laminating a skin layer made of a fiber nonwoven fabric is used (see, for example, Patent Document 1).

特許第３３６１２６７号（請求項１、図１，図２）Japanese Patent No. 3361267 (Claim 1, FIG. 1, FIG. 2)

上記従来の積層繊維シートにあっては、いまだ防音性が充分でないと云う問題点があった。   The conventional laminated fiber sheet still has a problem that soundproofing is not sufficient.

本発明は、上記従来の課題を解決するための手段として、基材(2) と、該基材(2) の片面または両面に接着されている表皮材(3) とからなり、該基材(2) は表面側に低密度で裏面側に高密度の繊維層(2A,2B,2C)の複数層を積層してなる積層繊維シート(1) を提供するものである。
該基材(2) の最裏側の繊維層(2C)の繊維は他の繊維層(2A,2B) の繊維よりも細いものが使用されていることが望ましく、また該表皮材(3A,3B) の表面は撥水剤液が塗布されることによって、撥水加工が施されていることが望ましい。 The present invention comprises a substrate (2) and a skin material (3) bonded to one or both sides of the substrate (2) as a means for solving the above conventional problems, and the substrate (2) provides a laminated fiber sheet (1) formed by laminating a plurality of layers of fiber layers (2A, 2B, 2C) having a low density on the front side and a high density on the back side.
The fibers of the backmost fiber layer (2C) of the substrate (2) are preferably thinner than the fibers of the other fiber layers (2A, 2B), and the skin material (3A, 3B) It is desirable that the surface of) be subjected to water repellent treatment by applying a water repellent liquid.

本発明の積層繊維シートにあっては、基材が表面側に低密度で裏面側に高密度の繊維層の複数層の積層体からなり、各繊維層の低密度部分で吸音が行われ、高密度部分で遮音が行われる結果、極めて大きな防音効果が得られる。
そして表皮材は基材への雨水等の侵入を防ぎ、かつ遮音効果も発揮する。該表皮材の表面に撥水剤液を塗布すれば、雨水等の侵入は確実に阻止される。
上記基材において、最裏側の繊維層の繊維を他の繊維層の繊維よりも細くすると、該繊維層の構造が密になり、良好な防音効果が得られる。 In the laminated fiber sheet of the present invention, the substrate is composed of a laminate of a plurality of fiber layers having a low density on the front side and a high density on the back side, and sound absorption is performed at the low density part of each fiber layer, As a result of the sound insulation performed at the high density portion, an extremely large soundproofing effect can be obtained.
And a skin material prevents the penetration | invasion of rain water etc. to a base material, and also exhibits the sound-insulation effect. If a water repellent liquid is applied to the surface of the skin material, intrusion of rainwater or the like is reliably prevented.
In the above-mentioned base material, when the fibers in the backmost fiber layer are made thinner than the fibers in the other fiber layers, the structure of the fiber layer becomes dense and a good soundproofing effect is obtained.

〔基材〕
基材に使用する繊維は例えば、ポリエステル繊維、脂肪族または芳香族ポリアミド繊維、アクリル繊維、ポリエチレン繊維、ポリプロピレン繊維等のポリオレフィン繊維、ビニリデン繊維、ポリ塩化ビニル繊維、ポリウレタン繊維、ビニロン、レーヨン、キュプラ、アセテート繊維等のような有機合成繊維であり、通常太さ２ｄ〜１０ｄ程度のものが使用される。上記繊維は２種以上混合されてもよいし、またガラス繊維、岩綿、セラミック繊維、カーボン繊維等の無機繊維、あるいはパルプ、木片等の木質繊維、木綿、竹繊維、ヤシ繊維、ケナフ繊維、麻繊維等の植物繊維の若干量が混合されてもよい。 〔Base material〕
The fibers used for the substrate are, for example, polyester fibers, aliphatic or aromatic polyamide fibers, acrylic fibers, polyethylene fibers, polypropylene fibers and other polyolefin fibers, vinylidene fibers, polyvinyl chloride fibers, polyurethane fibers, vinylon, rayon, cupra, Organic synthetic fibers such as acetate fibers are usually used with a thickness of about 2d to 10d. Two or more kinds of the above fibers may be mixed, or inorganic fibers such as glass fiber, rock wool, ceramic fiber, and carbon fiber, or wood fibers such as pulp and wood pieces, cotton, bamboo fibers, palm fibers, kenaf fibers, Some amount of plant fiber such as hemp fiber may be mixed.

望ましい繊維としては融点２００℃以上の高融点繊維と融点１８０℃以下の低融点繊維との混合繊維がある。上記混合繊維において、高融点繊維と低融点繊維との混合質量比は、通常９０：１０〜５０：５０、望ましくは８０：２０〜６０：４０に設定される。   Desirable fibers include mixed fibers of high melting point fibers having a melting point of 200 ° C. or higher and low melting point fibers having a melting point of 180 ° C. or lower. In the mixed fiber, the mixing mass ratio of the high-melting fiber and the low-melting fiber is usually set to 90:10 to 50:50, desirably 80:20 to 60:40.

上記高融点繊維としては、融点２００℃以上のポリエステル繊維、ポリアミド繊維、アクリル繊維、トリアセテート繊維等が例示され、上記低融点繊維としては融点１８０℃以下のポリエステル繊維、ポリアミド繊維、ポリエチレン繊維、ポリプロピレン繊維等が例示される。   Examples of the high melting point fiber include polyester fiber, polyamide fiber, acrylic fiber, and triacetate fiber having a melting point of 200 ° C. or higher. Examples of the low melting point fiber include polyester fiber, polyamide fiber, polyethylene fiber, and polypropylene fiber having a melting point of 180 ° C. or lower. Etc. are exemplified.

上記繊維あるいは混合繊維はウェブ状繊維層、ウェブ状繊維層にニードルパンチングを施したニードル繊維層、低融点繊維を混合している混合繊維層の場合には、ウェブ状繊維層やニードル繊維層を加熱して低融点繊維を溶融せしめ、該低融点繊維溶融物で高融点繊維を結着した繊維層とされ、該繊維層を複数層積層して基材とする。   In the case of the above fiber or mixed fiber is a web-like fiber layer, a needle fiber layer obtained by needle punching the web-like fiber layer, or a mixed fiber layer in which low melting point fibers are mixed, the web-like fiber layer or the needle fiber layer is Heat is applied to melt the low-melting fiber, and the low-melting fiber melt forms a fiber layer in which the high-melting fiber is bound. A plurality of the fiber layers are laminated to form a substrate.

該繊維層の厚みは通常５mm〜２０mmとされ、目付けは通常４００〜８００ｇ／ｍ2 と される。 The thickness of the fiber layer is usually 5 mm to 20 mm, and the basis weight is usually 400 to 800 g / m 2 .

上記繊維層は表面側に低密度で裏面側に高密度とされる。具体的には密度は表面側で見掛け密度０．０１〜０．０３ｇ／cm3 、裏面側で０．０２〜０．０５ｇ／cm3 となるようにする。このように表面側と裏面側とで密度を変えるには、低融点繊維を含む繊維ウェブ層を低密度のものから高密度のものまで複数層積層して加熱し、所望なれば若干プレスして一体化して繊維層とする方法、繊維ウェブ層を一方の側からフェルト針によってニードルパンチングする方法等がある。フェルト針によってウェブ層の片面からニードルパンチングすると、ニードルパンチング側のウェブ層の密度は高くなり、反対側のウェブ層の密度は低くなる。 The fiber layer has a low density on the front side and a high density on the back side. Specifically density is the density 0.01~0.03g / cm 3 apparent at the surface side, so-0.02~0.05g / cm 3 at the back side. In order to change the density between the front side and the back side in this way, a plurality of layers of low-melting fiber web layers including low-melting fibers are laminated and heated, and if desired, slightly pressed. There are a method of integrating them into a fiber layer, a method of needle punching a fiber web layer with a felt needle from one side, and the like. When needle punching is performed from one side of the web layer with a felt needle, the density of the web layer on the needle punching side increases and the density of the web layer on the opposite side decreases.

上記繊維層は複数層、通常２〜５層積層される。積層された繊維層相互を結合するには、各繊維層に低融点繊維が混合されている場合には、該低融点繊維を溶融させることにより接着を行う方法、各繊維層間に低融点繊維を介在せしめて低融点繊維層を溶融せしめることにより接着を行う方法、合成樹脂接着剤やホットメルト型接着剤により接着する方法、ニードルパンチングにより絡合する方法、あるいは上記方法を２つ以上組み合わせた方法等が適用される。   The fiber layer is laminated in plural layers, usually 2 to 5 layers. In order to bond the laminated fiber layers to each other, when low melting point fibers are mixed in each fiber layer, the low melting point fibers are bonded by melting the low melting point fibers. A method of bonding by melting the low melting point fiber layer by interposing, a method of bonding by a synthetic resin adhesive or a hot melt type adhesive, a method of entanglement by needle punching, or a method of combining two or more of the above methods Etc. apply.

上記基材にあっては、最裏側の繊維層の繊維を他の繊維層の繊維よりも細くして層構造を密にすることが望ましい。通常最裏側以外の繊維層の繊維の太さは５〜１７ｄ、最裏側の繊維層の繊維の太さは１〜４ｄ程度とされる。   In the base material, it is desirable to make the fiber of the backmost fiber layer thinner than the fibers of the other fiber layers so that the layer structure is dense. Usually, the fiber thickness of the fiber layer other than the backmost side is 5 to 17d, and the fiber thickness of the backmost fiber layer is about 1 to 4d.

〔表皮材〕
表皮材としては、上記基材に使用する繊維と同様なものが用いられる。該表皮材は該基材に使用する繊維層よりも高密度にされ、通常０．０４ｇ／cm3 〜０．０６ｇ／cm3 に設定される。そして該表皮材の目付けは一般に５０〜３００ｇ／ｍ2 とされる。 [Skin material]
As the skin material, the same fibers as those used for the substrate are used. It said surface skin material is high-density than the fiber layer to be used for the substrate, is usually set to 0.04g / cm 3 ~0.06g / cm 3 . The surface weight of the skin material is generally 50 to 300 g / m 2 .

該表皮材の表面には脂肪酸ジルコニウム塩、シリコン樹脂、クロム錯塩、パラフィン、ワックス類、脂肪酸金属塩等の撥水剤の溶液が塗布されることが望ましい。該表皮材の表面に上記撥水剤の溶液を塗布することによって、該表皮材表面には撥水膜が形成され、撥水作用が効率良く発揮される。   It is desirable to apply a solution of a water repellent such as fatty acid zirconium salt, silicon resin, chromium complex salt, paraffin, waxes, fatty acid metal salt, etc. to the surface of the skin material. By applying the water repellent solution to the surface of the skin material, a water repellent film is formed on the surface of the skin material, and the water repellent effect is efficiently exhibited.

上記表皮材を上記基材の片面または両面に接着するには、通常の接着剤、低融点ポリアミド繊維不織布のようなホットメルトシート、ホットメルト接着剤粉末等の接着剤が使用されるが、上記接着剤に代えて、あるいは上記接着剤と共にニードルパンチングによって結合してもよい。   In order to adhere the skin material to one side or both sides of the base material, a normal adhesive, a hot melt sheet such as a low melting point polyamide fiber nonwoven fabric, or an adhesive such as a hot melt adhesive powder is used. You may couple | bond by needle punching instead of an adhesive agent or the said adhesive agent.

図１に本実施例の積層繊維シート(1) の側断面図を示す。上記積層繊維シート(1) は、基材(2) と、該基材(2) の両面に積層される表皮材(3A,3B) とからなり、該基材(2) は繊維層(2A,2B,2C)の３層の積層体からなる。   FIG. 1 shows a side sectional view of the laminated fiber sheet (1) of this example. The laminated fiber sheet (1) comprises a base material (2) and a skin material (3A, 3B) laminated on both surfaces of the base material (2), and the base material (2) comprises a fiber layer (2A , 2B, 2C).

各繊維層(2A,2B,2C)は厚み１３mm、目付け６００ｇ／ｍ2 であり、高融点ポリエステル繊維：低融点ポリエステル繊維の７：３質量比の混合繊維からなり、繊維層(2A,2B) にあっては繊維太さ６ｄ、繊維層(2C)にあっては繊維太さ３ｄのものが使用されている。
各繊維層(2A,2B,2C)は繊維ウェブ層を表側からニードルパンチングすることによって得られ、裏面側見掛け密度は０．０１ｇ／cm3 、表面側見掛け密度は０．０３ｇ／cm3 である。 Each fiber layer (2A, 2B, 2C) has a thickness of 13 mm and a basis weight of 600 g / m 2 , and is composed of a mixed fiber of 7: 3 mass ratio of high-melting polyester fiber: low-melting polyester fiber, and the fiber layer (2A, 2B) In this case, a fiber having a fiber thickness of 6d and a fiber layer (2C) having a fiber thickness of 3d are used.
Each fiber layer (2A, 2B, 2C) is obtained by needle punching the fiber web layer from the front side, and the back side apparent density is 0.01 g / cm 3 and the front side apparent density is 0.03 g / cm 3 . .

各繊維層(2A,2B,2C)は重ねられて基材(2) を構成し、該基材(2) の両面にはポリアミド繊維不織布であるホットメルトシートを介して見掛け密度０．０５ｇ／cm3 のポリエステル繊維ニードルパンチング不織布である表皮材(3) が重ねられる。そして得られた積層体は１８０℃で熱処理されかつ０．３ＭＰａの圧力でプレスされる。 Each fiber layer (2A, 2B, 2C) is superposed to form a base material (2), and an apparent density of 0.05 g / g is provided on both sides of the base material (2) via a hot melt sheet which is a polyamide fiber nonwoven fabric. A skin material (3) which is a polyester fiber needle punching nonwoven fabric of 3 cm 3 is overlaid. The resulting laminate is heat treated at 180 ° C. and pressed at a pressure of 0.3 MPa.

更に表面側の表皮材(3A)の表面には脂肪酸ジルコニウム塩の水分散液である撥水剤液が塗布量５０ｇ／ｍ2 でナイフコーターによって塗布され、１３０℃で乾燥される。 Further, a water repellent liquid, which is an aqueous dispersion of a fatty acid zirconium salt, is applied to the surface of the skin material (3A) on the surface side by a knife coater at a coating amount of 50 g / m 2 and dried at 130 ° C.

このようにして得られた積層繊維シート(1) （厚み４０mm、巾５００mm、長さ１９８０mm）について斜入射吸音率と残響室法吸音率（ＪＩＳ−Ａ−１４０９）を測定した結果を図２および図３に示す。
図２に示すグラフからみて、本発明の積層繊維シートは広い周波数域にわたって優れた吸音性を示すことがわかる。なお平均斜入射吸音率（αＲ．Ａ）は０．９２であった。
更に図３に示すグラフからも、本発明の積層繊維シートは広い周波数域にわたって優れた吸音性を示すことがわかる。 The laminated fiber sheet (1) thus obtained (thickness 40 mm, width 500 mm, length 1980 mm) was measured for oblique incidence sound absorption coefficient and reverberation room method sound absorption coefficient (JIS-A-1409). As shown in FIG.
From the graph shown in FIG. 2, it can be seen that the laminated fiber sheet of the present invention exhibits excellent sound absorption over a wide frequency range. The average oblique incidence sound absorption coefficient (αRA) was 0.92.
Furthermore, it can be seen from the graph shown in FIG. 3 that the laminated fiber sheet of the present invention exhibits excellent sound absorption over a wide frequency range.

本発明の積層繊維シートは、良好な遮音防音性を有し、かつ表面撥水性も良好であり、例えば自動車、建築物、高速道路の防音壁等の防音遮音材として有用である。   The laminated fiber sheet of the present invention has good sound insulation and sound insulation properties and good surface water repellency, and is useful as a sound insulation and sound insulation material for automobiles, buildings, sound insulation walls of highways, and the like.

本発明の一実施例の側断面図Side sectional view of one embodiment of the present invention 平均斜入射吸音率測定結果を示すグラフGraph showing average oblique incidence sound absorption coefficient measurement results 残響室法吸音率測定結果を示すグラフGraph showing reverberation room method sound absorption coefficient measurement results

符号の説明Explanation of symbols

1 積層繊維シート
2 基材
2A,2B,2C 繊維層
3,3A,3B 表皮材 1 Laminated fiber sheet
2 Base material
2A, 2B, 2C fiber layer
3,3A, 3B skin material

Claims (3)

基材と、該基材の片面または両面に接着されている表皮材とからなり、該基材は表面側に低密度で裏面側に高密度の繊維層の複数層を積層してなることを特徴とする積層繊維シート   It consists of a base material and a skin material bonded to one or both sides of the base material, and the base material is formed by laminating a plurality of fiber layers having low density on the front side and high density on the back side. Characteristic laminated fiber sheet 該基材の最裏側の繊維層の繊維は他の繊維層の繊維よりも細いものが使用されている請求項１に記載の積層繊維シート   The laminated fiber sheet according to claim 1, wherein the fibers in the fiber layer on the backmost side of the substrate are thinner than the fibers in other fiber layers. 該表皮材の表面は撥水剤液が塗布されることによって、撥水加工が施されている請求項１または２に記載の積層繊維シート   The laminated fiber sheet according to claim 1 or 2, wherein a water repellent finish is applied to the surface of the skin material by applying a water repellent liquid.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007034254A (en) * 2005-06-23 2007-02-08 Bridgestone Kbg Co Ltd Porous material-based sound absorbing material with improved sound absorbing performance
JP2007262713A (en) * 2006-03-28 2007-10-11 Sekisui Chem Co Ltd Sound insulation and vibration-proof sheet, pipe joint or pipe, pipe joint structure, pipe structure and leader structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007034254A (en) * 2005-06-23 2007-02-08 Bridgestone Kbg Co Ltd Porous material-based sound absorbing material with improved sound absorbing performance
JP2007262713A (en) * 2006-03-28 2007-10-11 Sekisui Chem Co Ltd Sound insulation and vibration-proof sheet, pipe joint or pipe, pipe joint structure, pipe structure and leader structure

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