JP2006171504A - Sound attenuating material - Google Patents

Sound attenuating material Download PDF

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JP2006171504A
JP2006171504A JP2004365555A JP2004365555A JP2006171504A JP 2006171504 A JP2006171504 A JP 2006171504A JP 2004365555 A JP2004365555 A JP 2004365555A JP 2004365555 A JP2004365555 A JP 2004365555A JP 2006171504 A JP2006171504 A JP 2006171504A
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tank
fiber bundle
fibers
fiber
bundle
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Tamio Yokoyama
民雄 横山
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Kureha Ltd
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Kureha Ltd
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  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound attenuating material that suppresses generation of oscillation sounds due to the oscillation of liquid fuel in a fuel tank of, for example, an automobile and can be easily charged in the tank and lowered of manufacturing cost, by eliminating the trouble of installation and fitting. <P>SOLUTION: The sound attenuating material is made of a bundle of long fibers of 0.2 to 1.0 mmϕ diameter of the fibers, constituting the bundle and ≤0.10 N/cm<SP>2</SP>in 50% compressive stress of an aggregate filled with long-fiber bundle. In particular, the long-fiber bundle preferably has the fibers imparted with random coiled-shaped crimps and a part of the bundle is heat-fused. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は消音材、特に車両などに搭載される燃料タンクに充填して用いられる消音材に係り、就中、合成樹脂製燃料タンク等に適した上記消音材に関するものである。   The present invention relates to a silencing material, particularly a silencing material used by filling a fuel tank mounted on a vehicle or the like, and more particularly to the silencing material suitable for a synthetic resin fuel tank or the like.

近年、熱可塑性合成樹脂材のブロー成型によって形成されたタンク容器が自動車や船舶などの燃料タンクとして用いられることが一般化して来ているが、このような燃料タンクにあっては、急旋回,急発進、並びに急停止の際にタンク内の液体燃料が大きく揺動すると、液体燃料がタンク内で大きく波打ち現象を起してタンク内壁を叩いたり、壁面で跳ね返った波が液面に落下して不快音を発生させている。   In recent years, it has become common that tank containers formed by blow molding of thermoplastic synthetic resin materials are used as fuel tanks for automobiles, ships and the like. If the liquid fuel in the tank greatly fluctuates during sudden start and stop, the liquid fuel will cause a large undulation phenomenon in the tank and hit the inner wall of the tank, or the wave that bounced off the wall will fall to the liquid level. Causing unpleasant noise.

このような液体燃料の揺動音や波動音による不快音は車両の品位を低下させるので出来る限り発生しないようにすることが好ましい。   Such an unpleasant noise due to the rocking sound or wave noise of the liquid fuel deteriorates the quality of the vehicle.

そこで、これら燃料タンクの燃料波による壁面打破音を防ぐため従来、例えば一体成形されたプラスチックタンクにおいて、対向側壁から一体的に内方向に突出したバッフルを設けること(例えば特許文献1参照)や、繊維状にした樹脂材料を互いに絡み合わせ、積み重ねるようにし、さらに繊維材料を異形断面に成形することにより音の発生を抑えること(例えば特許文献2参照)が試みられ、またタンク内部をバッフルで仕切るようにした合成樹脂製の燃料タンク(例えば特許文献3参照)や、更にサブタンクの外周面に、メインタンク内の液体燃料に揺動抵抗を与えるための邪魔板を設けること(例えば特許文献4参照)等が提案されている。
特開昭63−258750号公報 特開平5−139169号公報 特公平7−17160号公報 特開平11−240345号公報
Therefore, in order to prevent the wall surface breaking sound due to the fuel wave of these fuel tanks, for example, in an integrally molded plastic tank, a baffle that protrudes inward from the opposite side wall is provided (for example, see Patent Document 1), Attempts have been made to suppress the generation of sound by entwining and stacking fiber-shaped resin materials, and further forming the fiber material into an irregular cross section (see, for example, Patent Document 2), and partitioning the tank interior with baffles A synthetic resin fuel tank (see, for example, Patent Document 3) and a baffle plate for providing a swing resistance to the liquid fuel in the main tank are provided on the outer peripheral surface of the sub tank (see, for example, Patent Document 4). ) Etc. have been proposed.
JP-A 63-258750 Japanese Patent Laid-Open No. 5-139169 Japanese Patent Publication No. 7-17160 JP-A-11-240345

しかしながら、上記従来の各消音機構は、夫々、ある程度の効果を有するにしても十分ではなく、タンク自身、複雑になって金型が複雑化するのみならず、付加装置を設置するのに工程の増加や煩雑さと取付けのために手間がかかって、結果として製造コストを押し上げていた。   However, each of the above conventional silencing mechanisms is not sufficient even if it has a certain degree of effect, and the tank itself is not only complicated and the mold becomes complicated, but also the process of installing additional devices is not necessary. The increase, complexity, and installation are time consuming, resulting in increased manufacturing costs.

本発明は上述の如き実状に対処し、特に基本的な考えとして、燃料タンク内の液体燃料が大きく揺動し、液体燃料がタンク壁を叩いたり、壁面で跳ね返った燃料が液面に落下して揺動音が発生するのをシンプルなタンク内で抑えるためには液面が変化しても大波が立たないようにすることに着目し、液体燃料にどの液レベルになっても消音材が接していること、そしてこの際、タンクは出来るだけ改造しないこと、しかも消音材のタンク内への挿入が簡単であり、タンク内部全体に充填することなどに工夫を見出すことにより上記従来における製造コストの上昇を押え、消音材の材質の自由度が高く、かつ工程が極めて単純でほとんどの燃料タンクに容易に適用可能な消音材を提供することを目的とするものである。   The present invention copes with the above-described situation, and as a basic idea, the liquid fuel in the fuel tank largely fluctuates, the liquid fuel hits the tank wall, or the fuel bounced off the wall falls to the liquid level. In order to suppress the generation of rocking noise in a simple tank, focus on preventing large waves from occurring even if the liquid level changes. In this case, the tank should not be remodeled as much as possible, and it is easy to insert the sound deadening material into the tank. An object of the present invention is to provide a sound deadening material that has a high degree of freedom in the material of the sound deadening material, has a very simple process, and can be easily applied to most fuel tanks.

即ち、上記目的に適合する本発明の特徴は、長繊維からなる繊維束であって、繊維束を構成する繊維の径が0.2〜1.0mmであり、かつ繊維束を充填した集合体の50%圧縮応力が0.10N/cm2以下である消音材である。ここで、該繊維束はランダムコイル状クリンプが付与された長繊維の集合であり、かつ、繊維間の一部が熱融着された繊維束が望ましい。なお、上記繊維束を構成する樹脂は長繊維化可能であれば利用可能であるが、特にポリエステル樹脂 ,ナイロン樹脂 ,ポリオレフィン樹脂 ,フッ素樹脂からなる群より選ばれた1種又は2種以上の耐油性あるいは撥油性樹脂であることが好ましい。 That is, the feature of the present invention that meets the above object is a fiber bundle composed of long fibers, the diameter of the fibers constituting the fiber bundle is 0.2 to 1.0 mm, and an aggregate filled with the fiber bundle The sound deadening material has a 50% compressive stress of 0.10 N / cm 2 or less. Here, it is desirable that the fiber bundle is a set of long fibers to which random coil-like crimps are applied, and a fiber bundle in which a part of the fibers are thermally fused. The resin constituting the fiber bundle can be used as long as it can be made into a long fiber. In particular, one or two or more kinds of oil-resistant materials selected from the group consisting of polyester resin, nylon resin, polyolefin resin, and fluororesin are used. Or an oil-repellent resin.

上記長繊維よりなる集合体繊維束は、これを燃料タンク内に軽くタンク内壁面に接するように圧入して充填すると、タンク内部は底部から上部まで該繊維束が充填された状態となり、特に繊維束がコイル状クリンプを有する長繊維の集合であるときは、該繊維の形状復元力もあってタンク内で繊維束が一方に偏したり塊状になることがなく、位置が保持されタンク内部で動き回ることなく、どのような液面の状態であっても急発進,急停止に伴う液面の波動を効果的に吸収し、消音効果を奏することができる。しかも本発明はコイル状フィラメントの引き揃え集合体を挿入充填するだけであるから、製作工程が簡単でコストを低減することができる利点を有している。   When the aggregate fiber bundle made of the above-mentioned long fibers is press-fitted into the fuel tank so as to be lightly in contact with the inner wall surface of the tank, the inside of the tank is filled with the fiber bundle from the bottom to the top. When the bundle is a collection of long fibers having coiled crimps, the fiber bundles are not biased to one side or become agglomerated in the tank due to the shape restoring force of the fibers, and the positions are maintained and move around in the tank. Therefore, it is possible to effectively absorb the vibration of the liquid surface accompanying sudden start and stop regardless of the state of the liquid level, and achieve a silencing effect. Moreover, the present invention only has the advantage that the manufacturing process is simple and the cost can be reduced because only the assembling assembly of coiled filaments is inserted and filled.

以下、添付図面に基づいて本発明の実施態様を説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

図1は本発明に係る消音材を構成する繊維束の状態であり、図2は上記繊維束よりなる消音材を燃料タンクに充填した状態を示す。   FIG. 1 shows a state of a fiber bundle constituting the sound deadening material according to the present invention, and FIG. 2 shows a state in which a sound deadening material comprising the fiber bundle is filled in a fuel tank.

これら図において1は複数本のフィラメントよりなる繊維束、2はランダムコイルクリンプを付与した状態、3は燃料タンク本体、4は該タンクの蓋、5は燃料タンクの投入口で、前記繊維束1は長繊維の引き揃え集束からなる繊維束によって形成されており、図2に示す如くタンク本体3内に内壁面に軽く接する程度に蓋4を外してタンクの燃料投入口5より圧入、充填される。   In these figures, 1 is a fiber bundle made up of a plurality of filaments, 2 is a state in which a random coil crimp is applied, 3 is a fuel tank body, 4 is a lid of the tank, 5 is a fuel tank inlet, and the fiber bundle 1 Is formed by a bundle of fibers composed of long fibers, and as shown in FIG. The

ここで、吸音材を構成する繊維束1は長繊維(フィラメント)であることが必要であり、短繊維であるとタンク内に充填した繊維が次第に移動し易く、偏りを生じる原因となるので好ましくない。繊維長はその繊維の移動を押え得る長さであればよく、長い繊維であるとタンク内の移動がしにくい。また長繊維の紡出糸を一部接触させることにより繊維間の一部が熱融着していることも移動阻止のため好ましく、あるいは一部に融点を異にする樹脂が芯鞘又はサイドバイサイドに接合された熱融着性繊維を使用し、後処理により一部熱融着させることも可能である。   Here, the fiber bundle 1 constituting the sound-absorbing material needs to be long fibers (filaments), and if the fibers are short fibers, the fibers filled in the tank are likely to move gradually and cause a bias. Absent. The fiber length is not limited as long as the movement of the fiber can be suppressed. If the fiber length is long, the movement in the tank is difficult. It is also preferable to prevent movement by partially contacting the spun yarns of long fibers to prevent movement, or a resin having a different melting point is partially present on the core sheath or side-by-side. It is also possible to use heat-bonded fibers that have been bonded together and partially heat-bond by post-processing.

更に繊維間空隙率を高めるために繊維自身、図1に示す如くランダムコイル状のクリンプが付与された繊維を互いに集束させることも好ましい。繊維間空隙率は、タンク内での繊維の充填率と関連があり、液体燃料タンクに消音材を充填した充填量はタンクの容積をその分減少させるので、出来るだけ少ない方が好ましい。従って、空隙率は特に限定されるものではないが、タンクの利用効率から95%以上が望ましい。   Further, in order to increase the inter-fiber void ratio, it is also preferable to converge the fibers themselves and fibers to which random coil-like crimps are applied as shown in FIG. The inter-fiber porosity is related to the filling rate of the fibers in the tank, and the filling amount obtained by filling the liquid fuel tank with the sound deadening material decreases the volume of the tank accordingly. Therefore, the porosity is not particularly limited, but 95% or more is desirable from the utilization efficiency of the tank.

繊維束を構成する繊維は燃料液体に良好な耐油性に優れたポリエステル系樹脂,ナイロン系樹脂,ポリオレフィン系樹脂,フッ素樹脂が良好であり、特に撥油性であることはより好ましく、それらは1種又は2種以上混合して使用することもでき、単一樹脂の長繊維フィラメントに限らず、単一又は別個の低融点樹脂と高融点樹脂よりなる熱融着性複合フィラメントを使用することもできる。   The fibers constituting the fiber bundle are polyester resin, nylon resin, polyolefin resin, and fluororesin that are excellent in fuel liquid and excellent in oil resistance, and are particularly preferable to be oil repellency. Or it can also be used by mixing two or more types, and is not limited to a single fiber long fiber filament, but can also use a heat-fusible composite filament composed of a single or separate low melting point resin and high melting point resin. .

長繊維フィラメントは嵩高な長繊維繊維束を効率的に形成する上から予めランダムコイル状クリンプを施しておくか、挿入時にクリンプを付与するようにすることが有利である。なお、クリンプはランダムコイル状に限らず、ジグザグ状あるいは波状のクリンプがあるが、形状復元力,コイル状繊維の空間によって作用される消音,消波面からランダムコイル状のクリンプは最も有効である。また、上記繊維束を構成する長繊維の繊度は0.2〜1.0mmφの範囲が有効である。繊度が0.2mm未満であると、タンクに消音材を充填する場合、タンクの隅々まで充填でき、またタンク内壁面に沿うようにして充填するが、液体燃料を充填して使用すると、使用に従って繊維が詰まって偏りを生じ易く、また固まってタンク内空間が生じ、その結果、消音効果がなくなる。偏りは短繊維であると更に加速され、液体燃料の保持量が高くなり、液面の使用限界も斑を生じ易いので好ましくない。   From the viewpoint of efficiently forming a bulky long fiber fiber bundle, the long fiber filament is advantageously preliminarily subjected to random coil-like crimping, or to be crimped during insertion. The crimp is not limited to a random coil shape, but includes a zigzag or wave crimp. However, the random coil crimp is most effective in terms of the shape restoring force, the sound deadening and the wave-dissipating surface acted on by the coiled fiber space. The fineness of the long fibers constituting the fiber bundle is effectively in the range of 0.2 to 1.0 mmφ. When the fineness is less than 0.2 mm, when the tank is filled with a sound deadening material, it can be filled to every corner of the tank and along the inner wall surface of the tank. Accordingly, the fibers are easily clogged and biased, and the space in the tank is solidified. As a result, the silencing effect is lost. If the short fibers are used, the bias is further accelerated, the amount of liquid fuel retained is increased, and the use limit of the liquid level is likely to be uneven, which is not preferable.

一方、繊度が1.0mmφを越えるとタンクに消音材を充填する場合、タンク内の隅々に充填しにくく、またタンク面の壁面空間を作り易く、液体燃料を充満して使用するのに消音効果が少なくなるので好ましくない。しかし、繊維の偏りは少なく、液体燃料の保持量も少ない面もある。   On the other hand, when the fineness exceeds 1.0 mmφ, when the tank is filled with a silencer, it is difficult to fill every corner of the tank, and it is easy to make a wall surface on the tank surface. This is not preferable because the effect is reduced. However, there is also an aspect in which the fiber is less biased and the amount of liquid fuel held is also small.

本発明消音材は以上のように長繊維からなる繊維束で構成され、該繊維束を構成する繊維径、換言すれば、繊度が0.2〜1.0mmφの範囲のものであることが必要であるが、更に必要要件として繊維束を充填した集合体の50%圧縮応力が0.1N/cm2以下であることも求められる。この50%圧縮応力が0.1N/cm2を越えるときは燃料タンクに消音材を充填するのに、タンクの隅々まで充填しにくく、空間を作りやすく消音効果を減少させるので好ましくない。従って、長繊維からなる繊維束であって、構成する繊維径が0.2〜1.0mmの範囲にあり、該繊維束を充填した集合体の50%圧縮応力が0.1N/cm2以下である本発明消音材は従来の消音材に比し、優れた消音特性を有している。 The silencer of the present invention is composed of a fiber bundle composed of long fibers as described above, and it is necessary that the fiber diameter constituting the fiber bundle, in other words, the fineness is in the range of 0.2 to 1.0 mmφ. However, as a necessary requirement, it is also required that the 50% compressive stress of the aggregate filled with the fiber bundle is 0.1 N / cm 2 or less. When this 50% compressive stress exceeds 0.1 N / cm 2 , it is not preferable because the sound deadening material is filled in the fuel tank, but it is difficult to fill the entire tank, making it easier to create a space and reducing the sound deadening effect. Therefore, it is a fiber bundle composed of long fibers, the fiber diameter constituting the fiber bundle is in the range of 0.2 to 1.0 mm, and the aggregate filled with the fiber bundle has a 50% compressive stress of 0.1 N / cm 2 or less. The present silencing material is superior in silencing properties compared to conventional silencing materials.

このようにして図2に示すように本発明消音材を充填するときは、タンク内の燃料はクリンプが付与された繊維束の間隙を通して流通が自由であると共に、充填された揺動や波動が効率的に吸収され、消音効果が得られる。なお、本発明消音材のタンク内部への挿入は特別な挿入口を設置する必要はなく、かつ消音材を固定する必要もないので、製造工程の簡略化とコスト低減は極めて効果的である。   As shown in FIG. 2, when the silencer of the present invention is filled in this way, the fuel in the tank can freely flow through the gap between the fiber bundles to which crimps are applied, and the filled rocking and wave are efficient. Can be absorbed and a silencing effect can be obtained. In addition, since it is not necessary to install a special insertion port for inserting the silencer of the present invention into the tank, and it is not necessary to fix the silencer, it is very effective to simplify the manufacturing process and reduce the cost.

以下、更に本発明の実施例について説明する。   Examples of the present invention will be further described below.

実施例1
ポリプロピレン(PP)樹脂を幅20cm、長さ4cmのノズル有効面に孔径0.4mmのオリフィスを孔間にピッチ10mm間隔で配列したノズルより、単孔吐出量を1.04g/分にて吐出させ、ノズル面25cm下に冷却水を配し、幅25cmのステンレス製エンドレスネットを平行に15mm間隔で一対の引取りコンベアを水面上に一部出るように配した上に引取り、30本単位で吐出糸の接触部分を融着させつつ、両面を挟み込みつつ毎分1mの速度で20℃の冷却水中へ引込み固化させた後、巻き取った。
Example 1
A single hole discharge rate of 1.04 g / min is discharged from a nozzle in which polypropylene (PP) resin is 20 cm wide and 4 cm long on a nozzle effective surface where orifices with a hole diameter of 0.4 mm are arranged with a pitch of 10 mm between the holes. Cooling water is placed under 25 cm of the nozzle surface, and a stainless steel endless net with a width of 25 cm is arranged in parallel at intervals of 15 mm so that a pair of take-up conveyors are partly exposed on the surface of the water. While the contact portion of the discharge yarn was fused, both sides were sandwiched and drawn into cooling water at 20 ° C. at a rate of 1 m / min and wound up.

巻き取った繊維束(ストランド)は三次元ランダム構造体で30本の外径は約30mmφで1本の糸径は0.5mmφであった。10cmφで高さ10cmの円筒に均一充填した密度は0.020g/ccであった。   The wound fiber bundle (strand) was a three-dimensional random structure with 30 outer diameters of about 30 mmφ and one yarn diameter of 0.5 mmφ. The density of uniformly filling a cylinder having a diameter of 10 cm and a height of 10 cm was 0.020 g / cc.

実施例2
ポリアミド(Ny)を幅20cm、長さ4cmのノズル有効面に孔径0.8mmのオリフィスを孔間ピッチ10mm間隔で配列したノズルより、単孔吐出量を1.04g/分にて吐出させ、ノズル面25cm下に冷却水を配し、幅25cmのステンレス製エンドレスネットを平行に15mm間隔で一対の引取りコンベアを水面上に一部出るように配した上に引取り、30本単位で吐出糸の接触部分を融着させつつ、両面を挟み込みつつ毎分1mの速度で20℃の冷却水中へ引込み固化させた後、巻き取った。巻き取った繊維束(ストランド)は三次元ランダム構造体で30本の外径は約30mmφで1本の糸径は0.51mmφであった。10cmφで高さ10cmの円筒に均一充填した密度は0.018g/ccであった。
Example 2
From a nozzle in which an orifice with a hole diameter of 0.8 mm is arranged on a nozzle effective surface with a width of 20 cm and a length of 4 cm on a polyamide (Ny) nozzle at an interval of 10 mm between holes, the single hole discharge rate is 1.04 g / min. Cooling water is placed 25 cm below the surface, stainless steel endless nets with a width of 25 cm are arranged in parallel at intervals of 15 mm so that a part of the take-up conveyor is placed on the surface of the water, and the yarn is discharged in units of 30 units. While fusing the contact portions, the two portions were sandwiched and drawn into cooling water at 20 ° C. at a rate of 1 m / min and wound up. The wound fiber bundle (strand) was a three-dimensional random structure with 30 outer diameters of about 30 mmφ and one yarn diameter of 0.51 mmφ. The density of uniformly filling a cylinder having a height of 10 cm and a height of 10 cm was 0.018 g / cc.

比較例1
ポリプロピレン(PP)樹脂を幅20cm、長さ4cmのノズル有効面に孔径0.8mmのオリフィスを孔間ピッチ10mm間隔で配列したノズルより、単孔吐出量を1.04g/分にて吐出させ、ノズル面25cm下に冷却水を配し、幅25cmのステンレス製エンドレスネットを平行に15mm間隔で一対の引取りコンベアを水面上に一部出るように配した上に引取り、30本単位で吐出糸の接触部分を融着させつつ、両面を挟み込みつつ毎分1mの速度で20℃の冷却水中へ引込み固化させた後、巻き取った。
Comparative Example 1
Polypropylene (PP) resin is discharged at a single hole discharge rate of 1.04 g / min from a nozzle in which orifices having a hole diameter of 0.8 mm are arranged at an interval of 10 mm between holes on a nozzle effective surface having a width of 20 cm and a length of 4 cm. Cooling water is placed under 25 cm of the nozzle surface, and a stainless steel endless net with a width of 25 cm is taken in parallel with a distance of 15 mm between a pair of take-up conveyors so as to partially come out on the water surface, and discharged in units of 30 units. While fusing the contact portion of the yarn, it was drawn into a cooling water of 20 ° C. and solidified at a speed of 1 m / min while sandwiching both surfaces, and then wound up.

巻き取った繊維束(ストランド)は三次元ランダム構造体で30本の外径は30mmφで1本の糸径は1.2mmφであった。10cmφで高さ10cmの円筒に均一充填した密度は0.033g/ccであった。   The wound fiber bundle (strand) was a three-dimensional random structure with 30 outer diameters of 30 mmφ and one yarn diameter of 1.2 mmφ. The density uniformly filled into a 10 cmφ and 10 cm high cylinder was 0.033 g / cc.

比較例2
繊維径0.11mmφ(88デシテックス、カット長88mm)のポリプロピレン繊維(東亜紡織株式会社製品)を均一開繊してウエブを得た。このウエブを10cmφで高さ10cmの円筒に均一充填した密度は0.020であった。
Comparative Example 2
A polypropylene fiber (manufactured by Toa Boshoku Corporation) having a fiber diameter of 0.11 mmφ (88 decitex, cut length 88 mm) was uniformly opened to obtain a web. The density of uniformly filling this web into a cylinder having a diameter of 10 cm and a height of 10 cm was 0.020.

以上の実施例1,2及び比較例1,2に示した繊維束の三次元構造体ならびに繊維ウエブに基づいて夫々、繊維を構成する樹脂の種類,糸状態,集合状態,糸径,空隙率,50%圧縮応力,液体保持率,パッキング性ならびに消音性(揺動音)について対比し、その効果を確認した。その結果を後記表1に示す。なお、表中、夫々必要な数値は以下の測定方法により得た。
測定方法
(イ)糸径
マイクロスコープ(株式会社キーエンス製)によって糸を150倍に拡大して糸の直径を計測した。測定本数はn=10平均値で示した。単位はmmφである。
(ロ)空隙率
タンク内に充填した繊維束の量から繊維束の容積を算出しタンク容量で除して求めた。
Based on the three-dimensional structure and fiber web of the fiber bundle shown in Examples 1 and 2 and Comparative Examples 1 and 2, the type of resin constituting the fiber, the yarn state, the aggregated state, the yarn diameter, and the porosity , 50% compressive stress, liquid retention, packing properties, and muffler (rocking sound) were compared and their effects were confirmed. The results are shown in Table 1 below. In the table, necessary numerical values were obtained by the following measuring methods.
Measuring method
(A) Thread diameter The diameter of the thread was measured by enlarging the thread 150 times with a microscope (manufactured by Keyence Corporation). The number of measurements is shown as an average value of n = 10. The unit is mmφ.
(B) Porosity The volume of the fiber bundle was calculated from the amount of the fiber bundle filled in the tank, and divided by the tank capacity.

E=((T−W/ρ)/T)×100 (%)
E:空隙率(%)
T:タンク内容積(cc)
W:充填繊維量(g)
ρ:繊維の樹脂密度(g/cc)
(ハ)50%圧縮応力
圧縮試験は東洋ボールドイン社製50Kgテンシロンを用い、圧縮面積10.0cmφで圧縮高さ10.0cmの筒状に試料を高さ面まで充填し、圧縮速度20mm/minで試料を50%(高さ5cmまで圧縮し、初荷重0.1N/cm2)まで圧縮し、試料の圧縮変形率50%の応力を測定する。得られた応力を圧縮面積で除し、単位面積当りに換算して示した。
E = ((T−W / ρ) / T) × 100 (%)
E: Porosity (%)
T: Volume inside tank (cc)
W: Filled fiber amount (g)
ρ: Fiber resin density (g / cc)
(C) 50% compressive stress In the compression test, a 50 Kg Tensilon manufactured by Toyo Bald-In Co., Ltd. was used. The sample was filled in a cylindrical shape with a compression area of 10.0 cmφ and a compression height of 10.0 cm, and the compression speed was 20 mm / min. The sample is compressed to 50% (compressed to a height of 5 cm and an initial load of 0.1 N / cm 2 ), and the stress at a compression deformation rate of 50% is measured. The obtained stress was divided by the compression area and converted into a unit area.

測定回数はn=3の平均で示し、単位はN/cm2である。
(ニ)液体保持率
370ccペットボトルに繊維を充填し、ガソリン350ccを充填し栓をしてよく振って馴染ませた後、5分間放置してペットボトルの栓を外してガソリンを抜き出し、抜き出し状態で1分間静置して繊維のガソリン含油量を測定した。
The number of measurements is shown as an average of n = 3, and the unit is N / cm 2 .
(D) Liquid retention rate Fill the 370cc plastic bottle with fiber, fill with 350cc of gasoline, plug and shake well, let it sit for 5 minutes, unplug the PET bottle and pull out the gasoline And allowed to stand for 1 minute to measure the gasoline oil content of the fiber.

G=(1g/S)×100(%)
G:ガソリン含油率(%)
1g:糸に残留したガソリン量(%)
S:充填した糸の量(g)
(ホ)パッキング性
370ccペットボトルに繊維を充填し、ガソリン180ccを充填して栓をして激しく縦振りで10回振って糸の充填状態を評価した。
G = (1 g / S) × 100 (%)
G: Oil content of gasoline (%)
1g: Amount of gasoline remaining on thread (%)
S: Amount of yarn filled (g)
(E) Packing property A 370 cc plastic bottle was filled with fiber, filled with 180 cc of gasoline, capped, and vigorously shaken 10 times to evaluate the filling state of the yarn.

糸が初めの充填状態を保持している ○
部分的に偏りが見られる △
90%以上繊維の偏りがある ×
(へ)消音性
370ccペットボトルに繊維を充填し、ガソリン180ccを充填し栓をして、パッキング性評価後のペットボトルを外部の音を遮断するために発泡スチロール(巾35cm,縦25cm,高さ18cm,厚さ2.5cm)の中にペットボトルを横にセットし、音の感知をするために騒音計(SOUND LEVEL METER)(日本科学工業株式会社製 4001)のセンサーを取り付けて370ccペットボトルを横振り10回振ってその音の発生レベルを測定した。音のレベルはdBで示した。ペットボトルに糸を充填しないでガソリン180ccを充填した状態の音の発生レベルは70dBである。
Thread retains its initial filling state ○
Partially biased △
90% or more of fibers are biased ×
(F) Silencer 370cc PET bottle is filled with fiber, 180cc of gasoline is filled and stoppered, and the PET bottle after packing property evaluation is foamed polystyrene (width 35cm, length 25cm, height) 370cc PET bottle with a sensor of a sound level meter (SOUND LEVEL METER) (4001 made by Nippon Kagaku Kogyo Co., Ltd.) The sound generation level was measured by shaking 10 times. The sound level is shown in dB. The sound generation level when the PET bottle is filled with 180 cc of gasoline without filling the thread is 70 dB.

Figure 2006171504
上表より本発明に係る消音材は比較消音材に比較し、揺動音の発生レベルが低く、液体の揺動や波動を効果的に吸収していることが理解される。
Figure 2006171504
From the above table, it can be understood that the sound deadening material according to the present invention has a lower level of rocking noise generation than the comparative sound deadening material and effectively absorbs liquid rocking and wave motion.

また、パッキング性においても良好であり、糸が始めの充填状態を保持して効果的に消音効果が得られることが分かる。   Further, the packing property is also good, and it can be seen that the silencing effect can be effectively obtained while maintaining the initial filling state of the yarn.

本発明消音材は特に車両用燃料タンクの内部に挿入し、液面の揺動や波動の吸収に有用であるが、燃料タンクに限らず、液面の波動を吸収するため、液体搬送タンク内あるいは液槽内部に挿入し使用することも可能である。   The sound deadening material of the present invention is particularly inserted into a vehicle fuel tank and is useful for absorbing liquid level fluctuations and waves. However, the present invention is not limited to fuel tanks. Alternatively, it can be used by being inserted into the liquid tank.

本発明に係る消音材の繊維束の状態を示す概要図である。It is a schematic diagram which shows the state of the fiber bundle of the silencer which concerns on this invention. 消音材を燃料タンク内に組み込んだ状態を示す図である。It is a figure which shows the state which integrated the sound deadening material in the fuel tank.

符号の説明Explanation of symbols

1:繊維束
2:繊維束に付与したランダムコイルクリンプ状態
3:燃料タンク本体
4:燃料タンクの蓋
5:燃料タンクの燃料投入口
1: Fiber bundle 2: Random coil crimp state applied to the fiber bundle 3: Fuel tank main body 4: Fuel tank lid 5: Fuel tank fuel inlet

Claims (3)

長繊維からなる繊維束であって、該繊維束を構成する繊維の径が0.2〜1.0mmφの範囲にあり、かつ該繊維束を充填した集合体の50%圧縮応力が0.10N/cm2以下であることを特徴とする消音材。 A fiber bundle composed of long fibers, the diameter of the fibers constituting the fiber bundle is in the range of 0.2 to 1.0 mmφ, and the 50% compressive stress of the aggregate filled with the fiber bundle is 0.10 N A sound deadening material characterized by being / cm 2 or less. 繊維束がランダムコイル状クリンプが付与され、繊維間の一部が熱融着されてなる請求項1記載の消音材。   The silencer according to claim 1, wherein the fiber bundle is provided with a random coil-like crimp, and a part between the fibers is heat-sealed. 繊維束を構成する樹脂がポリエステル樹脂,ナイロン樹脂,ポリオレフィン樹脂,フッ素樹脂から選ばれた1種又は2種以上の耐油性樹脂である請求項1または2記載の消音材。   The silencer according to claim 1 or 2, wherein the resin constituting the fiber bundle is one or more oil-resistant resins selected from polyester resins, nylon resins, polyolefin resins, and fluororesins.
JP2004365555A 2004-12-17 2004-12-17 Sound attenuating material Pending JP2006171504A (en)

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Cited By (3)

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WO2017186471A1 (en) * 2016-04-29 2017-11-02 Kautex Textron Gmbh & Co. Kg Method for producing a liquid container, liquid container for a motor vehicle, and structure for reducing sloshing sounds
WO2018197250A3 (en) * 2017-04-25 2018-12-27 Kautex Textron Gmbh & Co. Kg Structure for reducing sloshing noises, device and method for producing a structure
US12030376B2 (en) 2017-04-25 2024-07-09 Kautex Textron Gmbh & Co. Kg Structure for reducing sloshing noises, device and method for producing a structure

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JPH0374218A (en) * 1989-08-17 1991-03-28 Nissan Motor Co Ltd Buffle structure of fuel tank
JP2004322996A (en) * 2003-04-11 2004-11-18 Shiienji:Kk Fuel tank equipped with breakwater material, fuel tank breakwater material, and manufacturing method for them

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JPS59124264A (en) * 1982-12-23 1984-07-18 住友電気工業株式会社 Fuel tank for automobile, etc.
JPH0374218A (en) * 1989-08-17 1991-03-28 Nissan Motor Co Ltd Buffle structure of fuel tank
JP2004322996A (en) * 2003-04-11 2004-11-18 Shiienji:Kk Fuel tank equipped with breakwater material, fuel tank breakwater material, and manufacturing method for them

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017186471A1 (en) * 2016-04-29 2017-11-02 Kautex Textron Gmbh & Co. Kg Method for producing a liquid container, liquid container for a motor vehicle, and structure for reducing sloshing sounds
KR20180124997A (en) * 2016-04-29 2018-11-21 카우텍스 텍스트론 게엠베하 운트 콤파니 카게 LIQUID CONTAINER, LIQUID CAR LIQUID, AND METHOD FOR MANUFACTURING STRUCTURE FOR REDUCING SLOSING SOUND
CN109070737A (en) * 2016-04-29 2018-12-21 考特克斯·特克斯罗恩有限公司及两合公司 Method for manufacturing liquid container, for the liquid container of motor vehicles and for reducing the structure for rocking sound
KR101965548B1 (en) 2016-04-29 2019-04-03 카우텍스 텍스트론 게엠베하 운트 콤파니 카게 LIQUID CONTAINER, LIQUID CAR LIQUID, AND METHOD FOR MANUFACTURING STRUCTURE FOR REDUCING SLOSING SOUND
CN109070737B (en) * 2016-04-29 2020-05-08 考特克斯·特克斯罗恩有限公司及两合公司 Method for producing a liquid container, liquid container for a motor vehicle and structure for reducing sloshing sound
US11325464B2 (en) 2016-04-29 2022-05-10 Kautex Textron Gmbh & Co., Kg Method for producing a liquid container, liquid container for a motor vehicle, and structure for reducing sloshing sounds
US11872880B2 (en) 2016-04-29 2024-01-16 Kautex Textron Gmbh & Co. Kg Method for producing a liquid container, liquid container for a motor vehicle, and structure for reducing sloshing sounds
WO2018197250A3 (en) * 2017-04-25 2018-12-27 Kautex Textron Gmbh & Co. Kg Structure for reducing sloshing noises, device and method for producing a structure
US12030376B2 (en) 2017-04-25 2024-07-09 Kautex Textron Gmbh & Co. Kg Structure for reducing sloshing noises, device and method for producing a structure

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