JP6585918B2 - Low weight sound absorbing dash pad for automobiles - Google Patents
Low weight sound absorbing dash pad for automobiles Download PDFInfo
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- JP6585918B2 JP6585918B2 JP2015088589A JP2015088589A JP6585918B2 JP 6585918 B2 JP6585918 B2 JP 6585918B2 JP 2015088589 A JP2015088589 A JP 2015088589A JP 2015088589 A JP2015088589 A JP 2015088589A JP 6585918 B2 JP6585918 B2 JP 6585918B2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0815—Acoustic or thermal insulation of passenger compartments
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0838—Insulating elements, e.g. for sound insulation for engine compartments
Description
本発明は、自動車用低重量吸音型ダッシュパッドに係り、より詳しくは、極細糸からなる吸音層と遮音層を相互接合して構成される自動車用低重量吸音型ダッシュパッドに関する。 The present invention relates to a low-weight sound-absorbing dash pad for automobiles, and more particularly to a low-weight sound-absorbing dash pad for automobiles constituted by mutually joining a sound-absorbing layer and a sound insulating layer made of ultrafine yarn.
通常、エンジンルームと車両室内との境界部にダッシュパネル（Ｄａｓｈ Ｐａｎｅｌ）が装着される。このダッシュパネルにはエンジンの騒音などを吸収、遮断して、騒音などが車両室内に伝わることを防ぐ一種の吸遮音材のダッシュパッドが装着される。
ダッシュパッドは、エンジンの騒音を遮断、除塵、吸音する機能と、走行中に発生する低周波、高周波の複合エネルギが車両の室内空間に伝わらないようにする機能を有する。
従来の車両用ダッシュパッドは、表１に記載するように車種ごとに材質が異なり、その厚さ及び重さを変化させて積層される構造である。
Usually, a dash panel is attached to the boundary between the engine room and the vehicle compartment. This dash panel is equipped with a dash pad of a kind of sound absorbing and insulating material that absorbs and blocks engine noise and prevents noise from being transmitted to the vehicle interior.
The dash pad has a function of blocking engine noise, removing dust, and absorbing sound, and a function of preventing low-frequency and high-frequency composite energy generated during traveling from being transmitted to the vehicle interior space.
As shown in Table 1, the conventional vehicle dash pad has a structure in which the material is different for each vehicle type, and the thickness and weight thereof are changed and stacked.
このように従来のダッシュパッドは、吸遮音性能を向上させるために車種ごとに異なる材質が２層から４層積層されるが、吸音層にＰＵ（Ｐｏｌｙｕｒｅｔｈａｎｅ）基材を適用し、遮音層にＨａｒｄ ＰＥＴ（Ｐｏｌｙｅｔｈｙｌｅｎｅｔｅｒｅｐｈｔｈａｌａｔｅ）を適用するため、全般的に車種ごとの吸遮音性能を向上させるために重量及び原価が上昇するという問題があった。
また、大量生産する場合、性能を検証確認するための試作金型及び量産金型を始めとし、実際の製品生産のために成型、トリミング金型、及びＰＵ発泡金型などが必要であるため、投資コスト及び製造原価が上昇し、吸音層と遮音層を貼り合わせるためのフィルム（ＰＡ６）などを必要とするため、原価上昇及び工数増加という問題があった。
As described above, the conventional dash pad has two to four layers of different materials for each vehicle type in order to improve the sound absorption and insulation performance. However, a PU (Polyurethane) base material is applied to the sound absorption layer, and the sound insulation layer is made of Hard. Since PET (Polyethylene terephthalate) is applied, there is a problem that the weight and cost increase in order to improve the sound absorption and insulation performance for each vehicle type.
In addition, in the case of mass production, a prototype mold and a mass production mold for verifying and confirming performance are necessary, and for actual product production, a molding, trimming mold, PU foaming mold, etc. are necessary. The investment cost and manufacturing cost increased, and a film (PA6) for bonding the sound absorbing layer and the sound insulating layer was required. Therefore, there was a problem that the cost increased and the number of man-hours increased.
本発明は、上記問題点を解決するためになされたものであって、吸遮音性能を極大化し、車両の室内快適性を改善できる自動車用低重量吸音型ダッシュパッドを提供することにその目的がある。
また、本発明は、軽量化及びそれによる車両の燃費改善、原価低減、工数低減及びインライン作業性が向上できる自動車用低重量吸音型ダッシュパッドを提供することにその目的がある。
The present invention has been made to solve the above-mentioned problems, and has an object to provide a low-weight sound-absorbing dash pad for automobiles that maximizes sound absorption and insulation performance and can improve vehicle interior comfort. is there.
Another object of the present invention is to provide a low-weight sound-absorbing dash pad for automobiles that can reduce the weight and thereby improve the fuel efficiency of the vehicle, reduce costs, reduce man-hours, and improve in-line workability.
本発明は、極細糸からなる第１吸音層と、
熱可塑性樹脂からなる遮音層と、
熱可塑性繊維（Ｔｈｅｒｍｏｐｌａｓｔｉｃ Ｆｉｂｅｒ）または熱可塑性異形断面糸（Ｍｕｌｔｉ−ｌｏｂａｌ Ｆｉｂｅｒ）からなる第２吸音層と、
を相互接合してなることを特徴とする。
The present invention includes a first sound absorbing layer made of ultrafine yarn,
A sound insulation layer made of thermoplastic resin;
A second sound-absorbing layer made of a thermoplastic fiber or a thermoplastic cross-section yarn (Multi-global Fiber);
Are joined together.
前記極細糸は、メルトブローポリプロピレン繊維とポリプロピレンステープル繊維を１００〜１，０００ｇ／ｍ２に合糸させることを特徴とする。 The ultra-fine yarn is characterized in that melt blown polypropylene fiber and polypropylene staple fiber are combined at 100 to 1,000 g / m 2 .
前記遮音層は、オレフィン（Ｏｌｅｆｉｎ）系樹脂とオレフィン系エラストマー（Ｅｌａｓｔｏｍｅｒ）のうち１つまたは２つからなり、単位重量は１００〜５，０００ｇ／ｍ２であることを特徴とする。 The sound insulation layer is made of one or two of an olefin resin and an olefin elastomer and has a unit weight of 100 to 5,000 g / m 2 .
前記第２吸音層は、１０重量％〜５０重量％の低融点（ＬＭ、Ｌｏｗ Ｍｅｌｔｉｎｇ）繊維を含むポリエチレンテレフタレート（ＰＥＴ、Ｐｏｌｙｅｔｈｙｌｅｎｅｔｅｒｅｐｈｔｈａｌａｔｅ）不織布であり、
前記低融点繊維は、
ポリエチレン（Ｐｏｌｙｅｔｈｙｌｅｎｅ）／ポリエチレンテレフタレートの複合繊維、ポリエチレン／ポリプロピレン（ｐｏｌｙｐｒｏｐｙｌｅｎｅ）の複合繊維、またはポリプロピレン／ポリエチレンテレフタレートの複合繊維からなり、単位重量は１００〜２，０００ｇ／ｍ２であることを特徴とする。
The second sound-absorbing layer is a polyethylene terephthalate (PET) non-woven fabric containing 10% to 50% by weight of a low melting point (LM) fiber,
The low melting point fiber is
It is made of a composite fiber of polyethylene / polyethylene terephthalate, a composite fiber of polyethylene / polypropylene, or a composite fiber of polypropylene / polyethylene terephthalate, and has a unit weight of 100 to 2,000 g / m 2. .
前記第１吸音層は、騒音が入ってくる側となるエンジンルーム側に配置されるようにして車両のダッシュパネルに設置されることを特徴とする。 The first sound absorbing layer is disposed on a dash panel of a vehicle so as to be disposed on an engine room side that is a side into which noise enters.
本発明によれば、
第１に、単位面積（m2）当たり１００〜１，０００ｇに過ぎない極細糸を吸音層に適用して遮音層と接合することで、極細糸の優れた吸音性により吸遮音性能を極大化させ、軽量化を実現することができる。
第２に、従来、吸音層として用いられるポリウレタンの代わりに極細糸を適用することで、ポリウレタン発泡金型の使用を排除でき、それによって生産性の向上及び原価低減を図ることができる。
第３に、従来、吸音層と遮音層を貼り合わせるためのＰＡ６フィルム及び付着工程などが不要となるため、原価及び工数の低減を実現することができる。
According to the present invention,
First, by applying ultrafine yarn of only 100 to 1,000 g per unit area (m 2 ) to the sound absorbing layer and joining it to the sound insulating layer, the sound absorbing and insulating performance is maximized by the excellent sound absorbing property of the ultrafine yarn. And weight reduction can be realized.
Secondly, the use of a polyurethane foam mold can be eliminated by applying ultrafine yarn instead of polyurethane conventionally used as a sound absorbing layer, thereby improving productivity and reducing costs.
Thirdly, since a PA6 film for attaching the sound absorbing layer and the sound insulating layer and an attaching step are not necessary, it is possible to realize cost reduction and man-hour reduction.
以下、添付した図面を参照して本発明について詳細に説明する。
図２に示す通り、本発明のダッシュパッドは、車両用ダッシュパネルに装着され、エンジンの騒音などを吸収及び遮断してエンジンの騒音などの車両室内への伝達を防止する一種の吸遮音材のダッシュパッドを提供するもので、極細糸からなる第１吸音層と、熱可塑性樹脂からなる遮音層と、熱可塑性繊維（Ｔｈｅｒｍｏｐｌａｓｔｉｃ Ｆｉｂｅｒ）または熱可塑性異形断面糸（Ｍｕｌｔｉ−ｌｏｂａｌ Ｆｉｂｅｒ）からなる第２吸音層と、が相互接合された構造である。
ここで、第１吸音層に用いられる極細糸は、メルトブローポリプロピレン繊維（Ｍｅｌｔ−ｂｌｏｗｎ Ｐｏｌｙｐｒｏｐｙｌｅｎｅ Ｆｉｂｅｒ）とポリプロピレンステープル繊維（Ｐｏｌｙｐｒｏｐｙｌｅｎｅ Ｓｔａｐｌｅ Ｆｉｂｅｒ）を１００〜１，０００ｇ／m2に合糸させたものである。
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
As shown in FIG. 2, the dash pad of the present invention is a kind of sound absorbing and insulating material that is mounted on a vehicle dash panel and absorbs and blocks engine noise to prevent transmission of engine noise and the like into the vehicle interior. A dash pad is provided, and includes a first sound absorbing layer made of ultrafine yarn, a sound insulating layer made of thermoplastic resin, and a second made of thermoplastic fiber or a thermoplastic-cross-section yarn. This is a structure in which the sound absorbing layer is joined to each other.
Here, the ultra fine yarn used for the first sound absorbing layer is obtained by combining melt blown polypropylene fiber (Melt-blow Polypropylene Fiber) and polypropylene staple fiber (Polypropylene Staple Fiber) at 100 to 1,000 g / m 2. .
より詳しくは、メルトブローポリプロピレン繊維を巻き取るダイ（Ｄｉｅ）で、メルトブローポリプロピレン繊維を上方から下方に撒き散らすように紡糸する時、一側では空気パルス（Ａｉｒ Ｐｕｌｓｉｎｇ）がメルトブローポリプロピレン繊維に提供され、それと共に他側ではポリプロピレンステープル繊維をメルトブローポリプロピレン繊維に加えることによって、メルトブローポリプロピレン繊維とポリプロピレンステープル繊維が合糸されて１００〜１，０００ｇ／m2の極細糸が製造される。
また、遮音層は第１吸音層と第２吸音層との間に挿入され、遮音層は熱可塑性樹脂からなり、第２吸音層は熱可塑性繊維または熱可塑性異形断面糸からなる。
遮音層は、遮音の役割と共に第１吸音層と第２吸音層を接着させる役割を担う。
More specifically, when spinning a melt blown polypropylene fiber so as to scatter the melt blown polypropylene fiber from above to below, an air pulse is provided to the melt blown polypropylene fiber on one side, by adding polypropylene staple fibers to meltblown polypropylene fibers on the other side, meltblown polypropylene fibers and polypropylene staple fibers are plied fine yarn of 100~1,000g / m 2 is produced along with.
The sound insulation layer is inserted between the first sound absorption layer and the second sound absorption layer, the sound insulation layer is made of a thermoplastic resin, and the second sound absorption layer is made of a thermoplastic fiber or a thermoplastic modified cross-section yarn.
The sound insulation layer plays a role of adhering the first sound absorption layer and the second sound absorption layer together with the role of sound insulation.
本発明の好ましい実施例で、遮音層は熱可塑性樹脂のオレフィン（Ｏｌｅｆｉｎ）系樹脂と熱可塑性エラストマー（ＴＰＥ、Ｔｈｅｒｍｏｐｌａｓｔｉｃ Ｅｌａｓｔｏｍｅｒ）のオレフィン系エラストマー（ＴＰＯ、Ｔｈｅｒｍｏｐｌａｓｔｉｃ Ｏｌｅｆｉｎ）のうち１つまたは２つからなり、単位重量は１００〜５，０００ｍ／ｍ２である。
また、第２吸音層は、ポリエチレンテレフタレート（ＰＥＴ、Ｐｏｌｙｅｔｈｙｌｅｎｅｔｅｒｅｐｈｔｈａｌａｔｅ）、さらに好ましくはＨａｒｄ ＰＥＴの熱可塑性繊維または熱可塑性異形断面糸からなり、より詳しくは、１０重量％〜５０重量％の低融点（ＬＭ、Ｌｏｗ Ｍｅｌｔｉｎｇ）繊維を含むポリエチレンテレフタレート（ＰＥＴ、Ｐｏｌｙｅｔｈｙｌｅｎｅｔｅｒｅｐｈｔｈａｌａｔｅ）不織布である。
In a preferred embodiment of the present invention, the sound insulation layer is composed of one or two of an olefin-based resin of a thermoplastic resin and an olefin-based elastomer (TPO) of a thermoplastic elastomer (TPE, Thermoplastic Elastomer). The unit weight is 100 to 5,000 m / m 2 .
The second sound-absorbing layer is made of polyethylene terephthalate (PET), more preferably Hard PET thermoplastic fiber or thermoplastic modified cross-section yarn, and more specifically, a low melting point (LM) of 10 wt% to 50 wt%. , Low Melting), a polyethylene terephthalate (PET) non-woven fabric.
ここで、低融点繊維は、ポリエチレン（Ｐｏｌｙｅｔｈｙｌｅｎｅ）／ポリエチレンテレフタレートの複合繊維、ポリエチレン／ポリプロピレン（ｐｏｌｙｐｒｏｐｙｌｅｎｅ）の複合繊維、またはポリプロピレン／ポリエチレンテレフタレートの複合繊維からなり、単位重量は１００〜２，０００ｇ／ｍ２である。
このような本発明のダッシュパッドを車両のダッシュパネルに適用する場合、第１吸音層はダッシュパネルにおいて騒音が入ってくる側となるエンジンルーム側に、そして第２吸音層は騒音が入ってくる側の反対側の車両室内側に配置する。
Here, the low melting point fiber is composed of a composite fiber of polyethylene (polyethylene) / polyethylene terephthalate, a composite fiber of polyethylene / polypropylene, or a composite fiber of polypropylene / polyethylene terephthalate, and the unit weight is 100 to 2,000 g / m. 2 .
When such a dash pad of the present invention is applied to a dash panel of a vehicle, the first sound absorbing layer enters the engine room side where noise enters in the dash panel, and the second sound absorbing layer receives noise. It is arranged on the vehicle interior side opposite to the side.
以下、本発明の実施例を比較例と共に詳細に説明するが、本発明が下記の実施例によって限定されるものではない。
実施例
第１吸音層としてＤ３の極細糸と、遮音層として熱可塑性エラストマー（ＴＰＥ）と、第２吸音層としてポリエチレンテレフタレート（ＰＥＴ）が順に積層された８４０ｍｍ×８４０ｍｍの大きさを有するダッシュパッドを製作した。
参考として、Ｄ３は極細糸のグレード（ｇｒａｄｅ）を示すが、Ｄ１は単位面積（m2）当たり１８０ｇ、Ｄ２は単位面積（m2）当たり２３０ｇ、Ｄ３は単位面積（m2）当たり３３０ｇである。
実施例では極細糸としてメルトブローポリプロピレン繊維とポリプロピレンステープル繊維を３３０ｇ／m2に合糸させたものを用いた。
また、下記の表２の実施例によるダッシュパッドの構成において、「Ｄ３（上）」は、極細糸（Ｄ３）が、騒音が入ってくる側（車両のエンジンルーム側）に配置されることを意味する。
Examples of the present invention will be described below in detail together with comparative examples, but the present invention is not limited to the following examples.
Example: The size of 840 mm x 840 mm in which D3 ultrafine yarn as the first sound absorbing layer, thermoplastic elastomer (TPE) as the sound insulating layer, and polyethylene terephthalate (PET) as the second sound absorbing layer are sequentially laminated. A dash pad with was produced.
For reference, D3 indicates the grade of ultrafine yarn, D1 is 180 g per unit area (m 2 ), D2 is 230 g per unit area (m 2 ), and D3 is 330 g per unit area (m 2 ). .
In the examples, melt blown polypropylene fibers and polypropylene staple fibers combined at 330 g / m 2 were used as ultrafine yarns.
In addition, in the configuration of the dash pad according to the example of Table 2 below, “D3 (upper)” means that the extra fine thread (D3) is arranged on the side from which noise enters (the engine room side of the vehicle). means.
比較例１〜２
比較例１〜２では、ポリエチレンテレフタレート（ＰＥＴ）と熱可塑性エラストマー（ＴＰＥ）とポリウレタン（ＰＵ）が順に積層された８４０ｍｍ×８４０ｍｍの大きさを有するダッシュパッドを製作した。
参考として、表２に記載した「ＰＵ（上）」は、ポリウレタン（ＰＵ）が、騒音が入ってくる側に配置されることを意味し、「ＰＵ（下）」は、ポリウレタン（ＰＵ）が、騒音が入ってくる側の反対側に配置されることを意味する。
Comparative Examples 1-2
In Comparative Examples 1 and 2, a dash pad having a size of 840 mm × 840 mm in which polyethylene terephthalate (PET), thermoplastic elastomer (TPE), and polyurethane (PU) were sequentially laminated was manufactured.
For reference, “PU (upper)” in Table 2 means that polyurethane (PU) is placed on the side where noise enters, and “PU (lower)” means that polyurethane (PU) , Which means that the noise is placed on the opposite side of the incoming side.
比較例３
前記実施例のように第１吸音層としてＤ３の極細糸と、遮音層として熱可塑性エラストマー（ＴＰＥ）と、第２吸音層としてポリエチレンテレフタレート（ＰＥＴ）が順に積層された８４０ｍｍ×８４０ｍｍの大きさを有するダッシュパッドを製作したが、極細糸（Ｄ３）が、騒音が入ってくる反対側に配置されるように逆にした構造で製作した。
参考として、表２で比較例３に記載した「Ｄ３（下）」は、極細糸（Ｄ３）が、騒音が入ってくる側の反対側（車両の室内側）に配置されることを意味する。
Comparative Example 3
A size of 840 mm × 840 mm in which D3 ultrafine yarn is used as the first sound absorbing layer, thermoplastic elastomer (TPE) is used as the sound insulating layer, and polyethylene terephthalate (PET) is used as the second sound absorbing layer in this order. The dash pad was manufactured, but the microfiber (D3) was reversed so that it was placed on the opposite side where noise entered.
For reference, “D3 (bottom)” described in Comparative Example 3 in Table 2 means that the extra fine yarn (D3) is disposed on the opposite side (vehicle interior side) of the side where noise enters. .
比較例４〜５
比較例４〜５では、吸音層としてＤ３の極細糸と、遮音層としてポリエチレンテレフタレート（ＰＥＴ）、熱可塑性エラストマー（ＴＰＥ）、ポリエチレンテレフタレート（ＰＥＴ）が順に積層された８４０ｍｍ×８４０ｍｍ大きさを有するダッシュパッドを製作した。
参考として、表２で比較例４に記載された「Ｄ３（上）」は、極細糸（Ｄ３）が、騒音が入ってくる側に配置されることを意味し、比較例５に記載された「Ｄ３（下）」は、極細糸が、騒音が入ってくる反対側に配置されることを意味する。
Comparative Examples 4-5
In Comparative Examples 4 to 5, a dash having a size of 840 mm × 840 mm in which D3 ultrafine yarn as the sound absorbing layer and polyethylene terephthalate (PET), thermoplastic elastomer (TPE), and polyethylene terephthalate (PET) as the sound insulating layer are sequentially laminated. I made a pad.
As a reference, “D3 (upper)” described in Comparative Example 4 in Table 2 means that the extra fine yarn (D3) is arranged on the side where noise enters, and is described in Comparative Example 5. “D3 (bottom)” means that the extra fine yarn is arranged on the opposite side where noise enters.
試験例１
前記実施例及び比較例によるダッシュパッドの吸音性能を確認するために、通常の簡易残響室法（Ａｌｐｈａ Ｃａｂｉｎ Ｍｅａｓｕｒｅｍｅｎｔ：Ａｂｓｏｒｐｔｉｏｎ）を用いて実施例及び比較例のダッシュパッドに対する吸音率を試験し、その結果は下記の表３及び図３に示す。
表３及び図３に示すように、本発明の実施例によるダッシュパッド、すなわちＰＥＴ＋ＴＰＥ＋Ｄ３（上）が順に積層及び接合されたダッシュパッドの吸音率が比較例に比べて高いことが分かる。
Test example 1
In order to confirm the sound absorption performance of the dash pad according to the examples and comparative examples, the sound absorption rate for the dash pads of the examples and comparative examples was tested using a normal simple reverberation chamber method (Alpha Cabin Measurement: Absorption), The results are shown in Table 3 below and FIG.
As shown in Table 3 and FIG. 3, it can be seen that the sound absorption coefficient of the dash pad according to the example of the present invention, that is, the dash pad in which PET + TPE + D3 (upper) is sequentially laminated and bonded is higher than that of the comparative example.
試験例２
前記実施例及び比較例によるダッシュパッドの遮音性能を確認するために、通常のスモールキャビン法［ＡＰＡ ＭＡＴ ＴＥＳＴ：ＳＴＬ（Ｓｏｕｎｄ ｔｒａｎｓ ｌｏｓｓ）］を用いて音響伝達損失率を試験し、その結果は下記の表４及び図４に示す。
表４及び図４に示すように、本発明の実施例によるダッシュパッド、すなわちＰＥＴ＋ＴＰＥ＋Ｄ３（上）が順に積層及び接合されたダッシュパッドの音響伝達損失率が比較例に比べて周波数区間別に偏差があるが、比較例と同等な水準を維持することが分かる。
Test example 2
In order to confirm the sound insulation performance of the dash pad according to the example and the comparative example, the acoustic transmission loss rate was tested using a normal small cabin method [APA MAT TEST: STL (Sound Trans Loss)]. Table 4 and FIG.
As shown in Table 4 and FIG. 4, the acoustic transmission loss rate of the dash pad according to the embodiment of the present invention, that is, the dash pad in which PET + TPE + D3 (upper) is sequentially laminated and bonded has a deviation in each frequency section compared to the comparative example. However, it turns out that the level equivalent to a comparative example is maintained.
以上、本発明の好ましい実施例を図示して説明したが、本発明は前述した特定の実施例に限定されるものではなく、本発明の属する技術分野を逸脱しない範囲での全ての変更が含まれる。 Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and includes all modifications without departing from the technical field to which the present invention belongs. It is.
Claims (4)
熱可塑性樹脂からなる遮音層と、
熱可塑性繊維（Ｔｈｅｒｍｏｐｌａｓｔｉｃ Ｆｉｂｅｒ）または熱可塑性異形断面糸（Ｍｕｌｔｉ−ｌｏｂａｌ Ｆｉｂｅｒ）からなる第２吸音層と、を相互接合してなり、
前記極細糸は、メルトブローポリプロピレン繊維とポリプロピレンステープル繊維を１００〜１，０００ｇ／ｍ ２ に合糸させることを特徴とする自動車用低重量吸音型ダッシュパッド。 A first sound-absorbing layer made of extra fine yarn,
A sound insulation layer made of thermoplastic resin;
A second sound absorbing layer consisting of thermoplastic fibers (Thermoplastic Fiber) or a thermoplastic modified cross-section yarn (Multi-lobal Fiber), Ri greens and mutual joining,
The fine yarn is low weight acoustical type dash pad for automobile, characterized in that for doubling the meltblown polypropylene fibers and polypropylene staple fibers 100~1,000g / m 2.
前記低融点繊維は、ポリエチレン（Ｐｏｌｙｅｔｈｙｌｅｎｅ）／ポリエチレンテレフタレートの複合繊維、ポリエチレン／ポリプロピレン（ｐｏｌｙｐｒｏｐｙｌｅｎｅ）の複合繊維、またはポリプロピレン／ポリエチレンテレフタレートの複合繊維からなり、単位重量は１００〜２，０００ｇ／ｍ２であることを特徴とする請求項１に記載の自動車用低重量吸音型ダッシュパッド。 The second sound-absorbing layer is a polyethylene terephthalate (PET) non-woven fabric containing 10% to 50% by weight of a low melting point (LM) fiber,
The low-melting fiber is composed of a polyethylene / polyethylene terephthalate composite fiber, a polyethylene / polypropylene composite fiber, or a polypropylene / polyethylene terephthalate composite fiber. The unit weight is 100 to 2,000 g / m 2 . The low-weight sound-absorbing dash pad for automobiles according to claim 1, wherein
The low-weight sound-absorbing type for an automobile according to claim 1, wherein the first sound-absorbing layer is disposed on a dash panel of a vehicle so as to be disposed on an engine room side on which noise enters. Dash pad.
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| KR102138900B1 (en) | 2019-05-29 | 2020-07-30 | (주)대한솔루션 | Sound absorbing materials and method for automotive engine room with enhanced thermal resistance |
| KR102420023B1 (en) * | 2020-09-10 | 2022-07-12 | 나홍주 | Sound absorbing material and method for fabricating the same |
| CN113682004A (en) * | 2021-09-29 | 2021-11-23 | 无锡吉兴汽车部件有限公司 | Lightweight sound insulation pad and preparation method and application thereof |
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| JP3264761B2 (en) * | 1993-12-07 | 2002-03-11 | トヨタ車体株式会社 | Polypropylene silencer pad |
| JPH10340087A (en) * | 1997-06-09 | 1998-12-22 | Ikeda Bussan Co Ltd | Soundproofing and heat insulating member |
| JP2006292946A (en) * | 2005-04-08 | 2006-10-26 | Nissen Chemitec Corp | Sound absorption structure and sound absorption panel for automobile |
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