JPH08246313A - Bulky nonwoven fabric for thermoforming - Google Patents
Bulky nonwoven fabric for thermoformingInfo
- Publication number
- JPH08246313A JPH08246313A JP7053832A JP5383295A JPH08246313A JP H08246313 A JPH08246313 A JP H08246313A JP 7053832 A JP7053832 A JP 7053832A JP 5383295 A JP5383295 A JP 5383295A JP H08246313 A JPH08246313 A JP H08246313A
- Authority
- JP
- Japan
- Prior art keywords
- nonwoven fabric
- fiber
- thermoforming
- fibers
- bulky nonwoven
- 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.)
- Granted
Links
Landscapes
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Nonwoven Fabrics (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、車両のエンジンルー
ム、並びに車室内に設置されるインシュレータダッシ
ュ、インシュレータフード等の吸音材の成形に好適な熱
成形用嵩高性不織布に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bulky nonwoven fabric for thermoforming, which is suitable for molding a sound absorbing material such as an insulator dash and an insulator hood installed in a vehicle engine room and a vehicle interior.
【０００２】[0002]
【従来の技術】例えば、図６に示すように、車両のエン
ジンルーム１内には、インシュレータフード３ａ、イン
シュレータダッシュフロント３ｂ、インシュレータエン
ジンアンダーカバー３ｃ、車室内２には、インシュレー
タダッシュ３ｄ、フロアカーペット３ｅ等、吸音機能あ
るいは遮音機能をもつ各種防音材３が設置されている。2. Description of the Related Art For example, as shown in FIG. 6, an engine hood 1 of a vehicle has an insulator hood 3a, an insulator dash front 3b, an insulator engine undercover 3c, and a vehicle interior 2 has an insulator dash 3d and a floor carpet. Various soundproof materials 3 having a sound absorbing function or a sound insulating function such as 3e are installed.
【０００３】従来の防音材３としては、高比重の充填材
を混入してなる塩ビシート、ゴムシート、等の遮音材
や、ポリウレタンフォーム、フェルト、不織布等の多孔
質基材からなる吸音材が通常使用されている。As the conventional soundproofing material 3, a soundproofing material such as a vinyl chloride sheet or a rubber sheet mixed with a filler having a high specific gravity, or a sound absorbing material made of a porous base material such as polyurethane foam, felt or nonwoven fabric is used. Normally used.
【０００４】ところで、最近では車体パネルの面形状に
正確にフィットするように、吸音材として成形吸音材を
使用することが主流であり、例えば、繊維系のものは、
化繊や綿糸にバインダ樹脂を添加し、プレスで成形す
る。この場合、熱可塑性タイプのバインダ樹脂として
は、ポリエチレン樹脂やポリプロピレン樹脂などの熱融
着性繊維が使用され、また熱硬化性タイプのバインダ樹
脂としては、フェノール樹脂が使用されることが多い。By the way, recently, it is mainstream to use a molded sound absorbing material as the sound absorbing material so as to accurately fit the surface shape of the vehicle body panel.
Binder resin is added to synthetic fiber and cotton yarn, and it is molded by pressing. In this case, a thermofusible fiber such as a polyethylene resin or a polypropylene resin is used as the thermoplastic binder resin, and a phenol resin is often used as the thermosetting binder resin.
【０００５】最近の傾向として、より優れた吸音効果が
得られる、細デニールの基本繊維と熱融着性繊維との組
み合わせを使用することが多くなってきており、細デニ
ールの基本繊維間の結合力を高めるために、特殊な加工
を施した、ポリエステル繊維等の補助繊維を混入してい
る。As a recent tendency, a combination of fine denier basic fibers and heat-fusible fibers, which can obtain a better sound absorbing effect, has been often used, and a bond between the fine denier basic fibers is used. In order to increase the strength, auxiliary fibers such as polyester fibers that have undergone special processing are mixed.
【０００６】この補助繊維の構成としては、３〜１３デ
ニールの比較的太い繊維を使用しており、機械的に巻縮
をかけて、カール状に形成するか、膨張率のことなる繊
維同士を結合させ、図７に示すように、加熱によりカー
ル状に形成し、繊維間のバインド力を強化することによ
り、繊維崩れのない良好な不織布マットの形成を可能に
している。The auxiliary fibers are composed of relatively thick fibers having a denier of 3 to 13 and are mechanically crimped to form curls or fibers having different expansion coefficients. By binding them and forming them into a curl shape by heating as shown in FIG. 7 and strengthening the binding force between the fibers, it is possible to form a good non-woven mat without fiber collapse.
【０００７】そして、この補助繊維の混入割合は、通
常、不織布１００重量部中、２０〜３０重量部混入され
ている。The mixing ratio of the auxiliary fiber is usually 20 to 30 parts by weight in 100 parts by weight of the nonwoven fabric.
【０００８】これら熱成形用嵩高性不織布の加熱処理工
程を図８を基に説明すると、熱風加熱炉４内に、ネット
５上に載置した不織布６を搬送装置によりスライド式に
投入するというものであり、熱風加熱炉４内にはヒータ
ー４ａ、ファン４ｂ、整流板４ｃが設けられており、フ
ァン４ｂにより、加熱炉４内には１４０〜２００℃の熱
風が強制循環している。The heat treatment process of these bulky non-woven fabrics for thermoforming will be described with reference to FIG. 8. The non-woven fabric 6 placed on the net 5 is slid into the hot-air heating furnace 4 by a carrier device. The heater 4a, the fan 4b, and the rectifying plate 4c are provided in the hot air heating furnace 4, and the hot air of 140 to 200 ° C. is forcedly circulated in the heating furnace 4 by the fan 4b.
【０００９】また、生産効率を考慮して、加熱炉４内で
の不織布６の加熱時間は３０〜９０秒に調整されてい
る。In consideration of production efficiency, the heating time of the nonwoven fabric 6 in the heating furnace 4 is adjusted to 30 to 90 seconds.
【００１０】[0010]
【発明が解決しようとする課題】しかしながら、従来で
は、不織布６の加熱工程の効率を高めるために、加熱炉
４内の温度を上げたり、ファン４ｂの送風量を増大させ
るようにしているが、そうした場合、不織布６が、風圧
により押しつぶされ、不織布６の厚みが薄くなり、例え
ば、図７に示すように、加熱工程の前後では厚みが３０
ｍｍから２５ｍｍに減少し、製品厚みが不足し、剛性、
並びに吸音性能の低下をもたらすという不具合が指摘さ
れていた。However, in the prior art, in order to increase the efficiency of the heating process of the nonwoven fabric 6, the temperature inside the heating furnace 4 is raised and the blowing amount of the fan 4b is increased. In such a case, the nonwoven fabric 6 is crushed by the wind pressure, and the thickness of the nonwoven fabric 6 becomes thin. For example, as shown in FIG. 7, the nonwoven fabric 6 has a thickness of 30 before and after the heating step.
mm to 25 mm, product thickness is insufficient, rigidity,
In addition, it has been pointed out that there is a problem that the sound absorbing performance is deteriorated.
【００１１】この対策として、補助繊維を多く混入した
場合には、補助繊維の繊維径が比較的太いため、剛性は
確保できるものの、重量化を招いたり、吸音性能が犠牲
にならざるを得ないという問題点があった。As a countermeasure against this, when a large amount of auxiliary fiber is mixed, the auxiliary fiber has a relatively large fiber diameter, so that the rigidity can be secured, but the weight is increased and the sound absorbing performance is sacrificed. There was a problem.
【００１２】本発明は、このような事情に鑑みてなされ
たもので、自動車室内及びエンジン室内に設置される吸
音材の成形に使用される熱成形用嵩高性不織布に関する
もので、成形前の加熱工程において、加熱温度が低温で
済み、加熱時間も著しく短縮化できる等、加熱工程にお
ける効率を高めるとともに、加熱装置の負荷も軽減で
き、しかも、優れた吸音性能が確保できる熱成形用嵩高
性不織布を提供することを目的としている。The present invention has been made in view of the above circumstances, and relates to a bulky non-woven fabric for thermoforming, which is used for molding a sound absorbing material installed in an automobile compartment and an engine compartment. In the process, the heating temperature is low, and the heating time can be significantly shortened. For example, the efficiency of the heating process can be improved, the load on the heating device can be reduced, and excellent sound absorbing performance can be secured. Is intended to provide.
【００１３】[0013]
【課題を解決するための手段】上記目的を達成するため
に、本発明は、自動車室内及びエンジン室内に設置され
る吸音材の成形に使用される熱成形用嵩高性不織布にお
いて、前記熱成形用嵩高性不織布は、繊維径が細く、か
つ、高融点を有する基本繊維と、低融点の熱融着性繊維
と、中空コンジュゲート繊維とを絡成してマット状に形
成してなることを特徴とする。In order to achieve the above object, the present invention provides a bulky non-woven fabric for thermoforming, which is used for molding a sound absorbing material installed in an automobile compartment and an engine compartment. The bulky non-woven fabric is characterized by being formed into a mat shape by entwining basic fibers having a small fiber diameter and a high melting point, low melting point heat-fusible fibers and hollow conjugate fibers. And
【００１４】上記基本繊維は、３デニール以下のよう
に、繊維径が細く、かつ熱融着性繊維よりも高融点を有
する、ポリエステル、ナイロン、ポリアクリロニトリ
ル、ポリアセテート、などの合成繊維が使用可能であ
り、特に、ポリエステル繊維が適している。一方、低融
点の熱融着性繊維は、低融点ポリエステル、ポリエチレ
ン、ポリプロピレン、ポリアミド等の低融点の合成繊維
が使用可能であり、特に、低融点ポリエステル繊維がよ
い。As the basic fiber, synthetic fibers such as polyester, nylon, polyacrylonitrile, and polyacetate, which have a small fiber diameter of 3 denier or less and have a higher melting point than the heat-fusible fiber, can be used. In particular, polyester fiber is suitable. On the other hand, as the low melting point heat-fusible fiber, a low melting point synthetic fiber such as low melting point polyester, polyethylene, polypropylene or polyamide can be used, and particularly low melting point polyester fiber is preferable.
【００１５】また、中空コンジュゲート繊維は、基本繊
維と同一材質の、ポリエステル、ナイロン、ポリアクリ
ロニトリル、ポリアセテート、などの合成繊維が使用可
能である。As the hollow conjugate fiber, synthetic fibers made of the same material as the basic fiber, such as polyester, nylon, polyacrylonitrile and polyacetate, can be used.
【００１６】そして、基本繊維と熱融着性繊維の配合割
合は、基本繊維５０〜７０重量部、熱融着性繊維１０〜
３０重量部であり、好ましくは、基本繊維６０重量部、
熱融着性繊維２０重量部である。The mixing ratio of the basic fiber and the heat-fusible fiber is 50 to 70 parts by weight of the basic fiber and 10 to 10 of the heat-fusible fiber.
30 parts by weight, preferably 60 parts by weight of basic fiber,
20 parts by weight of heat-fusible fiber.
【００１７】中空コンジュゲート繊維は、線膨張率の相
違する繊維同士例えば、ポリエステル繊維同志を接合し
てなり、繊維長１〜３インチ，繊維径３〜１３デニー
ル、中空率２０〜４０％のものがよく、熱成形用嵩高性
不織布１００重量部中、１０〜３０重量部混入されてい
ることを特徴とする。The hollow conjugate fiber is formed by joining fibers having different linear expansion coefficients, for example, polyester fibers, having a fiber length of 1 to 3 inches, a fiber diameter of 3 to 13 denier, and a hollow ratio of 20 to 40%. 10 to 30 parts by weight are mixed in 100 parts by weight of the bulky nonwoven fabric for thermoforming.
【００１８】更に、基本繊維と熱融着繊維と中空コンジ
ュゲート繊維はカード内に混入され、カードからベルト
コンベア上に供給し、ニードルパンチ工程、及びまた
は、熱風加熱工程により、マット状に絡成するが、その
際の目付量は、２５０〜１５００ｇ／ｍ2 である。Further, the basic fiber, the heat fusion fiber and the hollow conjugate fiber are mixed in the card, supplied from the card onto the belt conveyor, and entangled in a mat shape by a needle punching step and / or a hot air heating step. However, the basis weight at that time is 250 to 1500 g / m 2 .
【００１９】[0019]
【作用】以上の構成から明らかなように、不織布中の中
空コンジュゲート繊維は、加熱により、スパイラル径が
大きくなり、バインド力が強化されるため、中空コンジ
ュゲート繊維の混入比率を低減できる。As is apparent from the above construction, the hollow conjugate fiber in the nonwoven fabric has a large spiral diameter due to heating and the binding force is strengthened, so that the mixing ratio of the hollow conjugate fiber can be reduced.
【００２０】したがって、細径の基本繊維の混入比率を
多くできるため、空洞部開口が多く形成され、通気抵抗
が増し、吸音性能が向上する。Therefore, since the mixing ratio of the basic fibers having a small diameter can be increased, a large number of cavity openings are formed, ventilation resistance is increased, and sound absorption performance is improved.
【００２１】更に、加熱効率を高めるために、加熱温度
を上げたり、送風ファンによる送風量を増大させても、
製品厚みが薄くならず、製品厚みを十分確保できるとと
もに、剛性が低下することもない。Further, in order to increase the heating efficiency, even if the heating temperature is raised or the amount of air blown by the blower fan is increased,
The product thickness does not become thin, the product thickness can be sufficiently secured, and the rigidity does not decrease.
【００２２】[0022]
【実施例】以下、本発明に係る熱成形用嵩高性不織布の
一実施例について添付図面を参照しながら詳細に説明す
る。EXAMPLES An example of the bulky nonwoven fabric for thermoforming according to the present invention will be described in detail below with reference to the accompanying drawings.
【００２３】図１は、本発明に係る熱成形用嵩高性不織
布を適用した自動車用インシュレーターダッシュの構成
を示す断面図、図２は、熱成形用嵩高性不織布の断面
図、図３は、熱成形用嵩高性不織布に使用する中空コン
ジュゲート繊維の模式断面図、図４は、本発明に係る熱
成形用嵩高性不織布のマット形成工程を示す説明図、図
５は、熱成形用嵩高性不織布の加熱工程後の状態を示す
断面図である。FIG. 1 is a sectional view showing the structure of an automobile insulator dash to which the bulky nonwoven fabric for thermoforming according to the present invention is applied. FIG. 2 is a cross-sectional view of the bulky nonwoven fabric for thermoforming. A schematic cross-sectional view of a hollow conjugate fiber used for a bulky nonwoven fabric for molding, FIG. 4 is an explanatory view showing a mat forming step of the bulky nonwoven fabric for thermoforming according to the present invention, and FIG. 5 is a bulky nonwoven fabric for thermoforming. It is sectional drawing which shows the state after the heating process of FIG.
【００２４】図１において、エンジンルームＥと車室Ｒ
とを区画するダッシュパネル１０の室内面側には、自動
車用インシュレーターダッシュ１１が添設固定されてお
り、このインシュレーターダッシュ１１は、高比重の充
填材を混入してなる塩ビシート、ゴムシート等の高密度
の遮音材１２と、不織布、フェルト等吸音機能を有する
吸音材１３との積層体から構成されており、特に本発明
においては、吸音材１３として、特殊な熱成形用嵩高性
不織布２０を使用することが特徴である。In FIG. 1, an engine room E and a vehicle room R
An insulator dash 11 for automobiles is attached and fixed to the interior surface side of the dash panel 10 that divides the and the dash panel 10. The insulator dash 11 is made of a vinyl chloride sheet, a rubber sheet, or the like containing a filler having a high specific gravity. It is composed of a laminated body of a high-density sound insulating material 12 and a non-woven fabric, a sound absorbing material 13 having a sound absorbing function such as felt, and in the present invention, a special thermoforming bulky nonwoven fabric 20 is used as the sound absorbing material 13. It is characterized by using it.
【００２５】すなわち、上記熱成形用嵩高性不織布２０
は、図２に示すように、高融点を有する基本繊維３０
と、低融点の熱融着性繊維４０と、両者をバインドする
中空コンジュゲート繊維５０とから構成されている。That is, the above-mentioned bulky nonwoven fabric 20 for thermoforming
Is a basic fiber 30 having a high melting point, as shown in FIG.
And a low melting point heat-fusible fiber 40, and a hollow conjugate fiber 50 that binds both.
【００２６】更に詳しくは、基本繊維３０は、３デニー
ル以下のように、繊維径が細く、かつ、融点の高い繊
維、例えば、ポリエステル、ナイロン、ポリアクリロニ
トリル、ポリアセテート、などの合成繊維が使用可能で
あり、特に、高融点ポリエステル繊維（融点２５０〜２
６０℃）が適しており、低融点の熱融着性繊維４０は、
低融点ポリエステル、ポリエチレン、ポリプロピレン、
ポリアミド等の低融点の合成繊維が使用可能であり、特
に、低融点ポリエステル繊維（融点１１０〜１３０℃）
がよく、両者の配合割合は、基本繊維３０：５０〜７０
重量部、熱融着性繊維４０：１０〜３０重量部の範囲が
良い。More specifically, the basic fiber 30 can be a fiber having a small fiber diameter and a high melting point such as 3 denier or less, for example, synthetic fiber such as polyester, nylon, polyacrylonitrile, polyacetate. And especially high melting point polyester fiber (melting point 250-2
60 ° C. is suitable, and the low melting point heat fusible fiber 40 is
Low melting point polyester, polyethylene, polypropylene,
Low melting point synthetic fibers such as polyamide can be used, and particularly low melting point polyester fibers (melting point 110 to 130 ° C.)
The ratio of the both is 30:50 to 70 for the basic fiber.
The range of 10 parts by weight to 40 parts by weight of the heat-fusible fiber is preferable.
【００２７】一方、中空コンジュゲート繊維５０は、ポ
リエステル、ナイロン、ポリアクリロニトリル、ポリア
セテート、などの合成繊維が使用可能であり、繊維長１
〜３インチ，繊維径３〜１３デニールのものを使用する
とともに、本実施例では、図３に示すように、線膨張率
の異なる２種類のポリエステル繊維５１、５２を接合し
てなり、中空率２０〜４０％に調整されており、熱成形
用嵩高性不織布２０の全重量に対して、中空コンジュゲ
ート繊維３０は１０〜２０重量部混入されている。On the other hand, as the hollow conjugate fiber 50, synthetic fibers such as polyester, nylon, polyacrylonitrile and polyacetate can be used, and the fiber length is 1
.About.3 inches and a fiber diameter of 3 to 13 denier are used, and in this embodiment, as shown in FIG. 3, two types of polyester fibers 51 and 52 having different linear expansion coefficients are joined to each other, and It is adjusted to 20 to 40%, and 10 to 20 parts by weight of the hollow conjugate fiber 30 is mixed with the total weight of the bulky nonwoven fabric 20 for thermoforming.
【００２８】次に、熱成形用嵩高性不織布２０の形成工
程は、図４に示すように、基本繊維３０、熱融着性繊維
４０、中空コンジュゲート繊維５０をカード６０内に混
入した後、ベルトコンベア６１上にマット状に散布す
る。そして、ニードルパンチ機６２により各繊維をバイ
ンドさせて所望厚みの熱成形用嵩高性不織布２０を形成
すれば良い。Next, in the step of forming the bulky nonwoven fabric 20 for thermoforming, as shown in FIG. 4, after the basic fiber 30, the heat-fusible fiber 40, and the hollow conjugate fiber 50 are mixed in the card 60, It is spread on the belt conveyor 61 in the form of a mat. Then, the fibers may be bound by the needle punching machine 62 to form the bulky nonwoven fabric 20 for thermoforming having a desired thickness.
【００２９】尚、マット状に絡成された熱成形用嵩高性
不織布２０の目付量は、２５０〜１５００ｇ／ｍ2 であ
る。The basis weight of the bulky thermoforming nonwoven fabric 20 entangled in a mat is 250 to 1500 g / m 2 .
【００３０】本発明に係る熱成形用嵩高性不織布２０
は、以上のように構成されているため、図５に示すよう
に、吸音材１２のコールドプレス成形前に、熱風加熱炉
内で加熱する際、加熱前の熱成形用嵩高性不織布２０の
厚みａが３０ｍｍであったものが、中空コンジュゲート
繊維５０はスパイラル径が大きく券縮するため、熱成形
用嵩高性不織布２０の加熱工程後の厚みｂは、３５〜４
０ｍｍに膨らみ、図７に示す中実コンジュゲート繊維を
使用した場合の加熱工程後の厚みが２５ｍｍに減少する
のに比べ、コールドプレス成形前の熱成形用嵩高性不織
布２０の厚みを十分確保でき、最終製品の板厚、並びに
剛性を十分確保できる。Bulky nonwoven fabric 20 for thermoforming according to the present invention
Since it is configured as described above, as shown in FIG. 5, when the sound absorbing material 12 is heated in a hot air heating furnace before cold press molding, the thickness of the bulky nonwoven fabric 20 for thermoforming before heating. Although a was 30 mm, since the hollow conjugate fiber 50 has a large spiral diameter and is contracted, the thickness b of the bulky nonwoven fabric 20 for thermoforming after the heating step is 35-4.
The thickness of the bulky nonwoven fabric 20 for thermoforming before cold press molding can be sufficiently secured as compared with the thickness after swelling to 0 mm and the thickness after the heating step when the solid conjugate fiber shown in FIG. 7 is used is reduced to 25 mm. It is possible to secure sufficient board thickness and rigidity of the final product.
【００３１】更に、熱成形用嵩高性不織布２０の加熱工
程は、上述したように、中実コンジュゲート繊維に比
べ、中空コンジュゲート繊維３０の混入比率が少なくて
済むため、細径の基本繊維の割合を多くでき、空洞部開
口による通気抵抗が増大し、吸音性能が向上する。Further, in the heating step of the bulky non-woven fabric 20 for thermoforming, as described above, the mixing ratio of the hollow conjugate fiber 30 is smaller than that of the solid conjugate fiber, so that the basic fiber having a small diameter can be used. The ratio can be increased, the ventilation resistance due to the opening of the cavity is increased, and the sound absorbing performance is improved.
【００３２】また、熱風加熱炉内での投入時間を、従来
の６０秒〜１００秒から２０〜６０秒に短縮化でき、し
かも、加熱温度についても、従来の１７０〜２００℃か
ら１３０〜１７０℃に温度を下げても十分軟化状態が得
られるため、熱風加熱炉の負荷も少なくて済む。Further, the charging time in the hot-air heating furnace can be shortened from 20 seconds to 60 seconds from the conventional 60 seconds to 100 seconds, and the heating temperature is also 170 to 200 ° C to 130 to 170 ° C. Since the softened state can be obtained sufficiently even if the temperature is lowered to 1, the load on the hot-air heating furnace can be reduced.
【００３３】上記中空コンジュゲート繊維３０の混入割
合を２０〜３０重量部に設定した場合は、熱成形用嵩高
性不織布２０における加熱前後の厚みは、加熱前の３０
ｍｍから４０〜６０ｍｍに膨らみ、上述実施例に比べ熱
成形用嵩高性不織布２０の原反厚みをより薄くでき、軽
量化に貢献できるとともに、材料を節約できる。When the mixing ratio of the hollow conjugate fibers 30 is set to 20 to 30 parts by weight, the thickness of the bulky nonwoven fabric 20 for thermoforming before and after heating is 30 before heating.
The thickness of the bulky non-woven fabric 20 for thermoforming can be made thinner than that of the above-described embodiment, contributing to weight reduction and saving the material.
【００３４】本発明に係る熱成形用嵩高性不織布２０を
加熱工程後、コールドプレス成形することにより、所要
形状の吸音材１３を得るとともに、別途、成形した遮音
材１２とを圧着金型により一体化することにより、図１
に示すように、所要形状の自動車用インシュレータダッ
シュ１１を製作できるが、上述したように、熱成形用嵩
高性不織布２０は、加熱工程において、原反時に比べ、
その厚みが十分確保されているため、ダッシュロア部の
ような肉厚部においても、吸音材１３の板厚精度を高め
ることが可能となる。After the heating step of the bulky nonwoven fabric 20 for thermoforming according to the present invention, cold pressing is performed to obtain a sound absorbing material 13 having a required shape, and the sound insulating material 12 that has been separately molded is integrated by a crimping die. By converting
As shown in FIG. 5, the automobile insulator dash 11 having a required shape can be manufactured. However, as described above, the thermoforming bulky nonwoven fabric 20 is heated in the heating step as compared with the time of the original fabric.
Since the thickness is sufficiently ensured, the plate thickness accuracy of the sound absorbing material 13 can be increased even in a thick portion such as a dash lower portion.
【００３５】尚、本実施例は自動車用インシュレーター
ダッシュ１１の吸音材１３に熱成形用嵩高性不織布２０
を適用したが、インシュレータフード、インシュレータ
エンジンアンダーカバー、インシュレータダッシュフロ
ント、フロアカーペット等、エンジンルームや車室内に
設置される吸音材に適宜使用しても良い。In the present embodiment, the sound absorbing material 13 of the insulator dash 11 for automobile is used as the bulky nonwoven fabric 20 for thermoforming.
However, it may be appropriately used for a sound absorbing material installed in an engine room or a vehicle compartment such as an insulator hood, an insulator engine undercover, an insulator dash front, and a floor carpet.
【００３６】[0036]
【発明の効果】以上説明したように、本発明に係る熱成
形用嵩高性不織布は、以下に記載する格別の作用効果を
有する。As described above, the thermoforming bulky nonwoven fabric according to the present invention has the following special effects.
【００３７】（１）細径でかつ、高融点を有する基本繊
維と、低融点の熱融着性繊維と、中空コンジュゲート繊
維とをマット状に絡成するという構成であり、中空コン
ジュゲート繊維は少量で強い結合力が得られるため、基
本繊維や熱融着性繊維の比率を高めることができ、空洞
部開口を大きく取れ、吸音性能が著しく向上するととも
に、軽量化にも貢献できるという効果を有する。(1) A hollow conjugate fiber having a structure in which a basic fiber having a small diameter and a high melting point, a heat-fusible fiber having a low melting point, and a hollow conjugate fiber are entwined in a mat shape. Since a strong binding force can be obtained with a small amount, the ratio of basic fibers and heat-fusible fibers can be increased, the cavity opening can be made large, sound absorption performance can be significantly improved, and it can also contribute to weight reduction. Have.
【００３８】（２）細径でかつ、高融点を有する基本繊
維と、低融点の熱融着性繊維と、中空コンジュゲート繊
維とをマット状に絡成するという構成であり、中空コン
ジュゲート繊維は少量で強い結合力が得られるため、熱
成形用嵩高性不織布を加熱する際、加熱温度が低くて済
み、加熱時間も短くて済むなど、熱成形用嵩高性不織布
の加熱工程での負荷が少なく、時間短縮も可能になる等
加熱工程における効率を著しく向上させることができる
という効果を有する。(2) A hollow conjugate fiber having a structure in which a basic fiber having a small diameter and a high melting point, a heat-melting fiber having a low melting point, and a hollow conjugate fiber are entwined in a mat shape. Since a strong binding force can be obtained with a small amount, when heating the bulky nonwoven fabric for thermoforming, the heating temperature can be low and the heating time can be short. There is an effect that the efficiency in the heating step can be remarkably improved, for example, the number is small and the time can be shortened.
【図１】本発明に係る熱成形用嵩高性不織布を適用した
自動車用インシュレーターダッシュの構成を示す断面
図。FIG. 1 is a cross-sectional view showing a structure of an automobile insulator dash to which a thermoforming bulky nonwoven fabric according to the present invention is applied.
【図２】本発明に係る熱成形用嵩高性不織布の断面図。FIG. 2 is a sectional view of a bulky nonwoven fabric for thermoforming according to the present invention.
【図３】本発明に係る熱成形用嵩高性不織布に使用する
中空コンジュゲート繊維の模式断面図。FIG. 3 is a schematic cross-sectional view of a hollow conjugate fiber used in the bulky nonwoven fabric for thermoforming according to the present invention.
【図４】本発明に係る熱成形用嵩高性不織布のマット形
成工程を示す説明図。FIG. 4 is an explanatory view showing a mat forming process of the bulky nonwoven fabric for thermoforming according to the present invention.
【図５】本発明に係る熱成形用嵩高性不織布の加熱工程
後の状態を示す断面図。FIG. 5 is a cross-sectional view showing a state after the heating step of the bulky nonwoven fabric for thermoforming according to the present invention.
【図６】従来の車両用インシユレータの設置箇所を示す
側面図。FIG. 6 is a side view showing a location where a conventional vehicle insulator is installed.
【図７】従来の成形不織布の構成を示す断面図。FIG. 7 is a cross-sectional view showing the structure of a conventional molded nonwoven fabric.
【図８】従来の成形不織布の加熱工程を示す説明図。FIG. 8 is an explanatory view showing a heating process of a conventional molded nonwoven fabric.
１０ ダッシュパネル １１ 自動車用インシュレーターダッシュ １２ 遮音材 １３ 吸音材 ２０ 熱成形用嵩高性不織布 ３０ 基本繊維 ４０ 熱融着性繊維 ５０ 中空コンジュゲート繊維 ５１、５２ ポリエステル繊維 ６０ カード ６１ ベルトコンベア ６２ ニードルパンチ機 10 Dash Panel 11 Insulator Dash for Automobile 12 Sound Insulation Material 13 Sound Absorbing Material 20 Bulky Nonwoven Fabric for Thermoforming 30 Basic Fiber 40 Thermal Fusion Fiber 50 Hollow Conjugate Fiber 51, 52 Polyester Fiber 60 Card 61 Belt Conveyor 62 Needle Punch Machine
Claims (3)
る吸音材（１３）の成形に使用される熱成形用嵩高性不
織布において、 前記熱成形用嵩高性不織布（２０）は、繊維径が細く、
かつ、高融点を有する基本繊維（３０）と、低融点の熱
融着性繊維（４０）と、中空コンジュゲート繊維（５
０）とを絡成してマット状に形成してなることを特徴と
する熱成形用嵩高性不織布。1. A bulky nonwoven fabric for thermoforming, which is used for molding a sound absorbing material (13) installed in an automobile compartment and an engine compartment, wherein the bulky nonwoven fabric for thermoforming (20) has a small fiber diameter,
Moreover, the basic fiber (30) having a high melting point, the heat-melting fiber (40) having a low melting point, and the hollow conjugate fiber (5)
(0) is entwined with mat to form a matte bulky nonwoven fabric for thermoforming.
ル以下の高融点ポリエステル繊維で構成されているとと
もに、低融点の熱融着性繊維（４０）は、低融点ポリエ
ステル繊維で構成されていることを特徴とする請求項１
記載の熱成形用嵩高性不織布。2. The basic fiber (30) is composed of a high melting point polyester fiber having a fiber diameter of 3 denier or less, and the low melting point heat fusible fiber (40) is composed of a low melting point polyester fiber. Claim 1 characterized by the above.
The bulky non-woven fabric for thermoforming described.
成形用嵩高性不織布（２０）１００重量部中に、１０〜
３０重量部混入されていることを特徴とする請求項１、
２記載の熱成形用嵩高性不織布。3. The hollow conjugate fiber (50) comprises 10 to 100 parts by weight of a bulky nonwoven fabric (20) for thermoforming.
30 parts by weight are mixed, Claim 1, characterized in that
The bulky nonwoven fabric for thermoforming according to 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7053832A JP3001392B2 (en) | 1995-03-14 | 1995-03-14 | Bulk nonwoven fabric for thermoforming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7053832A JP3001392B2 (en) | 1995-03-14 | 1995-03-14 | Bulk nonwoven fabric for thermoforming |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08246313A true JPH08246313A (en) | 1996-09-24 |
| JP3001392B2 JP3001392B2 (en) | 2000-01-24 |
Family
ID=12953771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7053832A Expired - Fee Related JP3001392B2 (en) | 1995-03-14 | 1995-03-14 | Bulk nonwoven fabric for thermoforming |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3001392B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2845696A1 (en) * | 2002-10-15 | 2004-04-16 | Elysees Balzac Financiere | Non-woven fabric contains majority of microfibres made from materials with higher melting point than thermally bonded fibres |
| JP2005348910A (en) * | 2004-06-10 | 2005-12-22 | Japan Vilene Co Ltd | Base material for mattress |
| US7677356B2 (en) | 2005-11-25 | 2010-03-16 | Foxconn Technology Co., Ltd. | Acoustic material and method for making the same |
| DE102009002536A1 (en) * | 2009-04-21 | 2010-10-28 | Culimeta Textilglas-Technologie Gmbh & Co.Kg | Fiber product, fiber molding and method for producing the same |
| JP2021014196A (en) * | 2019-07-12 | 2021-02-12 | 株式会社イノアックコーポレーション | Engine room cover |
| CN113276490A (en) * | 2021-04-26 | 2021-08-20 | 杭州诗蓝过滤科技有限公司 | Fluffy modified polypropylene sound-absorbing cotton and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01260051A (en) * | 1988-04-01 | 1989-10-17 | Mitsubishi Rayon Co Ltd | Fiber web |
| JPH073599A (en) * | 1993-06-14 | 1995-01-06 | Kanebo Ltd | Sound-absorbing material of high stiffness |
-
1995
- 1995-03-14 JP JP7053832A patent/JP3001392B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01260051A (en) * | 1988-04-01 | 1989-10-17 | Mitsubishi Rayon Co Ltd | Fiber web |
| JPH073599A (en) * | 1993-06-14 | 1995-01-06 | Kanebo Ltd | Sound-absorbing material of high stiffness |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2845696A1 (en) * | 2002-10-15 | 2004-04-16 | Elysees Balzac Financiere | Non-woven fabric contains majority of microfibres made from materials with higher melting point than thermally bonded fibres |
| EP1420097A1 (en) * | 2002-10-15 | 2004-05-19 | Financiere Elysees Balzac | Microfibrous nonwovens, complexes and manufacturing processes |
| JP2005348910A (en) * | 2004-06-10 | 2005-12-22 | Japan Vilene Co Ltd | Base material for mattress |
| JP4551133B2 (en) * | 2004-06-10 | 2010-09-22 | 日本バイリーン株式会社 | Base material for mattress |
| US7677356B2 (en) | 2005-11-25 | 2010-03-16 | Foxconn Technology Co., Ltd. | Acoustic material and method for making the same |
| DE102009002536A1 (en) * | 2009-04-21 | 2010-10-28 | Culimeta Textilglas-Technologie Gmbh & Co.Kg | Fiber product, fiber molding and method for producing the same |
| JP2021014196A (en) * | 2019-07-12 | 2021-02-12 | 株式会社イノアックコーポレーション | Engine room cover |
| CN113276490A (en) * | 2021-04-26 | 2021-08-20 | 杭州诗蓝过滤科技有限公司 | Fluffy modified polypropylene sound-absorbing cotton and preparation method thereof |
| CN113276490B (en) * | 2021-04-26 | 2022-06-17 | 杭州诗蓝过滤科技有限公司 | Fluffy modified polypropylene sound-absorbing cotton and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3001392B2 (en) | 2000-01-24 |
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