JP2006039379A - Sound insulating sheet - Google Patents

Sound insulating sheet Download PDF

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Publication number
JP2006039379A
JP2006039379A JP2004221756A JP2004221756A JP2006039379A JP 2006039379 A JP2006039379 A JP 2006039379A JP 2004221756 A JP2004221756 A JP 2004221756A JP 2004221756 A JP2004221756 A JP 2004221756A JP 2006039379 A JP2006039379 A JP 2006039379A
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Prior art keywords
sound
insulating sheet
sheet
absorbing material
fibrous
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Japanese (ja)
Inventor
Yoshihiro Obara
義弘 小原
Yasuyoshi Suzaki
康義 須崎
Shinichirou Emori
真一郎 江盛
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Nishikawa Rubber Co Ltd
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Nishikawa Rubber Co Ltd
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Priority to JP2004221756A priority Critical patent/JP2006039379A/en
Priority to US11/168,730 priority patent/US20060021823A1/en
Priority to CNA2005100809055A priority patent/CN1727631A/en
Priority to GB0515412A priority patent/GB2416737B/en
Publication of JP2006039379A publication Critical patent/JP2006039379A/en
Pending legal-status Critical Current

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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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/245—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it being a foam layer
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • 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
    • B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • 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
    • B32B5/18—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 features of a layer of foamed material
    • 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
    • B32B5/22—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/32—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 the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed at least two layers being foamed and next to each other
    • 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/06—Open cell foam
    • 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
    • B32B2266/00—Composition of foam
    • B32B2266/08—Closed cell foam
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/02—Cellular or porous
    • B32B2305/022—Foam
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/10—Fibres of continuous length
    • B32B2305/20—Fibres of continuous length in the form of a non-woven mat
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/08—Cars

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Laminated Bodies (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sound insulating sheet which exhibits sufficient sound insulating performance against noise of nearly 1,000 Hz. <P>SOLUTION: An arbitrary number of independent foam layers 11, continuous foam layers 12, and fibrous sound absorbing materials 13 are laminated in arbitrary order to cut off noise of nearly 1,000 Hz. An arbitrary number of independent foam layers 11 and fibrous sound absorbing materials 13 are laminated in arbitrary order. Further, an arbitrary number of continuous foam layers 12 and fibrous sound absorbing materials 13 are laminated in arbitrary order. Those sheets are used to cover a portion or the whole of a vehicle door inner panel on a cabin side. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば、自動車ドアの車内側に装着されるシートとして使用される遮音性シートに関するものである。   The present invention relates to a sound-insulating sheet used as, for example, a seat mounted on the inside of an automobile door.

従来、自動車ドアの車内側には、騒音の侵入あるいは漏出を目的として種々の遮音性対策が採られている。例えば、ドアインナーパネルの車内側に取付けられた内装用ドアトリムの裏面にフェルトやウレタンを貼付けたり、ドアインナーパネルにウレタン成形品を貼付ける手段が創案されている。   Conventionally, various sound insulation measures have been taken on the inner side of an automobile door for the purpose of noise intrusion or leakage. For example, a means for sticking felt or urethane to the back surface of an interior door trim attached to the inner side of the door inner panel or a urethane molded product to the door inner panel has been devised.

また、本出願人は、こうした従来技術における遮音性をさらに向上させるために、図１５に示すように、独立気泡１１ａが無数に点在した発泡体（独立気泡層１１）と、隣接する独立気泡１１ａが連通した連続気泡１２ａが点在した発泡体（連続気泡層１２）を積層した遮音性シートを創案し、先に出願した（特願２００４−０２０４１５号）。   Further, in order to further improve the sound insulation in such a prior art, the applicant of the present invention, as shown in FIG. 15, a foam (closed cell layer 11) innumerablely surrounded by closed cells 11a and adjacent closed cells. A sound insulating sheet was created by laminating a foam (open cell layer 12) interspersed with open cells 12a communicated with 11a, and was filed earlier (Japanese Patent Application No. 2004-020415).

さらに、これまで内燃機関の吸気に伴う騒音を吸収するための吸音材も創案されている（例えば、特許文献１，２参照）。
特開平８−１４６９６７号公報 特許第２５０３２１５号公報 Furthermore, a sound absorbing material for absorbing noise accompanying intake air of an internal combustion engine has been invented (see, for example, Patent Documents 1 and 2).
JP-A-8-146967 Japanese Patent No. 2503215

しかしながら、本出願人が先に出願した遮音性シートは、それまでのフェルトやウレタンを貼付けたものより遮音性に優れ、また、図１６に示すように、３０００Ｈｚ前後の高周波領域の騒音の遮音、および吸音性能には優れるものの、１０００Ｈｚ近くの騒音の遮音、および吸音性能にはさらなる改善の余地が残されている。同図において、「（１）ＮＩシート」が本出願人が先に出願した遮音性シートである。また、「（２）シンサレート」は、住友スリーエム社製の商品名であり、「（３）チップフェルト」はウレタンチップフェルトで、「（４）ペットフェルト」はレジンフェルトであり、いずれも比重０．０２程度の繊維系吸音材である。「（５）軟質ウレタン」はスポンジ状のものであり、ポリオール、ポリイソシアネートを主成分として発泡させた軟質の発泡体であり、比重０．０２程度のものである。なお括弧内の「ｔ」は肉厚（ｍｍ）を意味する。   However, the sound-insulating sheet previously filed by the present applicant is superior in sound-insulating properties than those pasted with felt and urethane, and as shown in FIG. 16, the sound-insulating noise in the high-frequency region around 3000 Hz, Although the sound absorption performance is excellent, there is still room for further improvement in the sound insulation and sound absorption performance near 1000 Hz. In the figure, “(1) NI sheet” is a sound insulating sheet previously filed by the present applicant. “(2) Thinsulate” is a product name manufactured by Sumitomo 3M Limited, “(3) Chip felt” is urethane chip felt, “(4) Pet felt” is resin felt, and each has a specific gravity of 0. It is a fiber type sound absorbing material of about .02. “(5) Soft urethane” is a sponge-like foam which is foamed with a polyol and polyisocyanate as the main components and has a specific gravity of about 0.02. “T” in parentheses means the thickness (mm).

また、特許文献１に記載の吸音材は、１００Ｈｚ〜３００Ｈｚといった領域での吸音効果に優れるのみであり、１０００Ｈｚ近くの吸音効果については充分ではない。特許文献２に記載の吸音材も１０００Ｈｚ近くの吸音効果については充分ではない。   Moreover, the sound absorbing material described in Patent Document 1 is only excellent in the sound absorbing effect in a region of 100 Hz to 300 Hz, and is not sufficient for the sound absorbing effect near 1000 Hz. The sound absorbing material described in Patent Document 2 is not sufficient for the sound absorbing effect near 1000 Hz.

そこで、本発明に記載の発明の目的とするところは、１０００Ｈｚ近くの騒音に対しても充分な遮音性を発揮する遮音性シートを提供することにある。   Accordingly, an object of the invention described in the present invention is to provide a sound insulating sheet that exhibits a sufficient sound insulating property even with respect to noise near 1000 Hz.

上記の目的を達成するために、本発明の請求項１に記載の遮音性シート（１０）は、任意の数の独立気泡層（１１）と連続気泡層（１２）と繊維質吸音材（１３）とを、任意の順に積層してなることを特徴とする。   In order to achieve the above object, the sound insulating sheet (10) according to claim 1 of the present invention comprises any number of closed cell layers (11), open cell layers (12), and fibrous sound absorbing material (13). ) Are stacked in any order.

ここで、独立気泡層（１１）とは、独立気泡（１１ａ）が無数に点在した発泡体である（図１５参照）。また、連続気泡層（１２）とは、隣接する独立気泡（１１ａ）同士が連通して形成した連続気泡（１２ａ）が点在した発泡体である（同図参照）。この連続気泡層（１２）には、独立気泡（１１ａ）と連続気泡（１２ａ）が共に点在した半連続気泡層（図示せず）を含む。   Here, the closed cell layer (11) is a foam in which countless closed cells (11a) are scattered (see FIG. 15). In addition, the open cell layer (12) is a foam in which open cells (12a) formed by communication between adjacent closed cells (11a) are dotted (see the figure). This open cell layer (12) includes a semi-open cell layer (not shown) interspersed with closed cells (11a) and open cells (12a).

請求項２に記載の遮音性シート（１０）は、任意の数の独立気泡層（１１）と繊維質吸音材（１３）とを、任意の順に積層してなることを特徴とする。   The sound insulating sheet (10) according to claim 2 is characterized in that an arbitrary number of closed cell layers (11) and a fibrous sound absorbing material (13) are laminated in an arbitrary order.

請求項３に記載の遮音性シート（１０）は、任意の数の連続気泡層（１２）と繊維質吸音材（１３）とを、任意の順に積層してなることを特徴とする。   The sound insulating sheet (10) according to claim 3 is characterized in that an arbitrary number of open cell layers (12) and a fibrous sound absorbing material (13) are laminated in an arbitrary order.

請求項４に記載の遮音性シート（１０）は、車両ドアインナーパネル（１）の車内側の一部または全部を覆うべく、任意の数の独立気泡層（１１）と連続気泡層（１２）と繊維質吸音材（１３）とを、任意の順に積層してなることを特徴とする。   The sound-insulating sheet (10) according to claim 4, wherein any number of closed cell layers (11) and open cell layers (12) are provided so as to cover a part or all of the inside of the vehicle door inner panel (1). And a fibrous sound absorbing material (13) are laminated in an arbitrary order.

請求項５に記載の遮音性シート（１０）は、車両ドアインナーパネル（１）の車内側の一部または全部を覆うべく、任意の数の独立気泡層（１１）と繊維質吸音材（１３）とを、任意の順に積層して構成してなることを特徴とする。   The sound-insulating sheet (10) according to claim 5 includes an arbitrary number of closed cell layers (11) and fibrous sound-absorbing material (13) so as to cover a part or all of the inside of the vehicle door inner panel (1). ) Are laminated in an arbitrary order.

請求項６に記載の遮音性シート（１０）は、車両ドアインナーパネル（１）の車内側の一部または全部を覆うべく、任意の数の連続気泡層（１２）と繊維質吸音材（１３）とを、任意の順に積層してなることを特徴とする。   The sound insulation sheet (10) according to claim 6 includes an arbitrary number of open cell layers (12) and a fibrous sound absorbing material (13) so as to cover a part or all of the inside of the vehicle door inner panel (1). ) Are stacked in any order.

請求項７に記載の遮音性シート（１０）は、請求項４または５に記載の発明において、最も車外側に位置する層を独立気泡層（１１）としてなることを特徴とする。   The sound insulating sheet (10) according to claim 7 is characterized in that, in the invention according to claim 4 or 5, the layer located on the outermost side of the vehicle is the closed cell layer (11).

請求項８に記載の遮音性シート（１０）は、請求項６に記載の発明において、最も車外側に位置する層を連続気泡層（１２）としてなることを特徴とする。   The sound insulating sheet (10) according to claim 8 is characterized in that, in the invention according to claim 6, the layer located on the outermost side of the vehicle is an open cell layer (12).

請求項９に記載の遮音性シート（１０）は、請求項１乃至８のいずれかに記載の発明において、繊維質吸音材（１３）がウレタンチップフェルトまたはレジンフェルトであることを特徴とする。   The sound-insulating sheet (10) according to claim 9 is characterized in that, in the invention according to any one of claims 1 to 8, the fibrous sound-absorbing material (13) is urethane chip felt or resin felt.

なお、カッコ内の記号は、図面および後述する発明を実施するための最良の形態に記載された対応要素または対応事項を示す。従来例で示したものと同一部分には同一符合を付した。   Symbols in parentheses indicate corresponding elements or corresponding matters described in the drawings and the best mode for carrying out the invention described later. The same parts as those shown in the conventional example are denoted by the same reference numerals.

本発明の請求項１に記載の遮音性シートによれば、独立気泡層と連続気泡層に加えて繊維質吸音材を積層したので、当該繊維質吸音材のはたらきによって、図１４に示すように、１０００Ｈｚ近くの騒音に対しても優れた遮音性を発揮することができる。   According to the sound insulating sheet according to claim 1 of the present invention, since the fibrous sound absorbing material is laminated in addition to the closed cell layer and the open cell layer, the function of the fibrous sound absorbing material is as shown in FIG. In addition, excellent sound insulation can be exhibited even for noises near 1000 Hz.

図１４に示すグラフは、四種類の遮音性シートを使用して、各遮音性シートの透過損失（ＴＬ［ｄＢ］）を実験によって得た数値を表示したものである。この結果から、独立気泡層と連続気泡層と繊維質吸音材とで構成される遮音性シート（「（３）ＮＩシート＋シンサレート」）が、１０００Ｈｚ近くにおける遮音性に最も優れることが分かる。   The graph shown in FIG. 14 displays numerical values obtained by experiments on the transmission loss (TL [dB]) of each sound insulating sheet using four types of sound insulating sheets. From this result, it can be seen that the sound insulating sheet composed of the closed cell layer, the open cell layer, and the fibrous sound-absorbing material (“(3) NI sheet + cinsalate”) is most excellent in the sound insulating property near 1000 Hz.

ちなみに、独立気泡層と連続気泡層からなるシート２枚と繊維質吸音材（「（４）ＮＩシート＋シンサレート＋ＮＩシート）とで構成される本発明に係る遮音性シートがそれに続き、独立気泡層と連続気泡層とで構成される従来のシート（「（１）ＮＩシート」）と、繊維質吸音材のみで構成されるシート（「（２）シンサレート１枚のみ」）が順に続く。なお、独立気泡層と連続気泡層からなるシート２枚と繊維質吸音材とで構成される本発明に係る遮音性シート（４）は、１０００Ｈｚ以上の領域において最も遮音性に優れる。
また、独立気泡層は遮音効果の他に防水効果にも優れ、連続気泡層は遮音効果に秀でている。 Incidentally, the sound-insulating sheet according to the present invention composed of two sheets composed of a closed-cell layer and an open-cell layer and a fibrous sound-absorbing material (“(4) NI sheet + cinsalate + NI sheet) is followed by the closed-cell layer. And a conventional sheet composed of an open cell layer ("(1) NI sheet") and a sheet composed of only a fibrous sound-absorbing material ("(2) only one synthesizer") successively. The sound insulating sheet (4) according to the present invention composed of two sheets composed of a closed cell layer and an open cell layer and a fibrous sound absorbing material is most excellent in sound insulating properties in a region of 1000 Hz or higher.
In addition to the sound insulation effect, the closed cell layer is excellent in the waterproof effect, and the open cell layer is excellent in the sound insulation effect.

請求項２に記載の遮音性シートによれば、独立気泡層に繊維質吸音材を積層して構成したので、当該繊維質吸音材のはたらきによって１０００Ｈｚ近くの騒音に対する遮音性にも優れる。また、独立気泡層のはたらきによって、防水効果にも優れる。   According to the sound-insulating sheet according to claim 2, since the fibrous sound-absorbing material is laminated on the closed cell layer, the sound-insulating property against noise near 1000 Hz is excellent due to the function of the fibrous sound-absorbing material. In addition, the waterproof effect is excellent due to the function of the closed cell layer.

請求項３に記載の遮音性シートによれば、連続気泡層に繊維質吸音材を積層して構成したので、同様に、１０００Ｈｚ近くの騒音に対する遮音性にも優れる。また、連続気泡層のはたらきによっても、遮音性が高い。   According to the sound-insulating sheet according to claim 3, since the fibrous sound-absorbing material is laminated on the open cell layer, the sound-insulating property against noise near 1000 Hz is also excellent. Also, the sound insulation is high due to the function of the open cell layer.

請求項４に記載の遮音性シートによれば、独立気泡層と連続気泡層に加えて繊維質吸音材を積層したので、１０００Ｈｚ近くの騒音に対する遮音性にも優れ、よって、車両ドアインナーパネルの車内側を覆うことによって、車外の騒音が車内へ侵入するのを、また、車内の騒音が車外へ漏出するのを、共に、より効果的に防ぐことができる。   According to the sound-insulating sheet according to claim 4, since the fibrous sound-absorbing material is laminated in addition to the closed cell layer and the open cell layer, the sound-insulating material is excellent in noise near 1000 Hz. By covering the inside of the vehicle, it is possible to more effectively prevent the outside noise from entering the inside of the vehicle and the inside noise from leaking outside the vehicle.

請求項５に記載の遮音性シートによれば、独立気泡層と繊維質吸音材とを積層したので、１０００Ｈｚ近くの騒音の遮音性にも優れ、車内の遮音効果をより高めることができる。また、独立気泡層のはたらきによって、車両ドアの防水効果を高めることができる。   According to the sound insulating sheet of claim 5, since the closed cell layer and the fibrous sound absorbing material are laminated, the sound insulating property of noise near 1000 Hz is excellent, and the sound insulating effect in the vehicle can be further enhanced. Further, the waterproof effect of the vehicle door can be enhanced by the function of the closed cell layer.

請求項６に記載の遮音性シートによれば、連続気泡層と繊維質吸音材とを積層したので、同様に、１０００Ｈｚ近くの騒音に対する遮音性にも優れ、車内の遮音性をさらに高めることができる。また、連続気泡層の優れた遮音性によっても、優れた遮音性を発揮する。   According to the sound-insulating sheet according to claim 6, since the open cell layer and the fibrous sound-absorbing material are laminated, similarly, the sound-insulating property against noise near 1000 Hz is excellent, and the sound-insulating property in the vehicle can be further enhanced. it can. In addition, excellent sound insulation is exhibited by the excellent sound insulation of the open cell layer.

請求項７に記載の遮音性シートによれば、請求項４または５に記載の発明において、最も車外側に位置する層を独立気泡層としたので、当該独立気泡層の持つ優れた防水効果によって車両ドアの防水性を効果的に高めることができる。   According to the sound insulating sheet according to claim 7, in the invention according to claim 4 or 5, since the layer located on the outermost side of the vehicle is a closed cell layer, the excellent waterproof effect of the closed cell layer is The waterproofness of the vehicle door can be effectively increased.

請求項８に記載の遮音性シートによれば、請求項６に記載の発明において、最も車外側に位置する層を連続気泡層としたので、当該連続気泡層の持つ優れた防水効果によって車両ドアの防水性を効果的に高めることができる。   According to the sound insulating sheet according to claim 8, in the invention according to claim 6, since the layer located on the outermost side of the vehicle is an open cell layer, the vehicle door is provided with the excellent waterproof effect of the open cell layer. It is possible to effectively improve the waterproof property.

請求項９に記載の遮音性シートによれば、請求項１乃至８に記載の発明において、繊維質吸音材がウレタンチップフェルトまたはレジンフェルトであるので、高い遮音効果を発揮し、また、経済性にも優れる。   According to the sound insulating sheet according to claim 9, in the invention according to claims 1 to 8, since the fibrous sound absorbing material is urethane chip felt or resin felt, it exhibits a high sound insulating effect and is economical. Also excellent.

図１乃至図６を参照して、本発明の第一実施形態に係る遮音性シート１０について説明する。図１は、第一実施形態に係る遮音性シート１０の取付け状態を示す分解斜視図である。図２乃至図６は、それぞれ遮音性シート１０を示すもので、図１のＡ−Ａ線断面図である。   With reference to FIG. 1 thru | or FIG. 6, the sound insulation sheet | seat 10 which concerns on 1st embodiment of this invention is demonstrated. FIG. 1 is an exploded perspective view showing an attached state of the sound insulating sheet 10 according to the first embodiment. 2 to 6 show the sound insulating sheet 10 and are sectional views taken along line AA in FIG.

これらの遮音性シート１０は、自動車ドアインナーパネル１と内装用ドアトリム２との間に、ドアインナーパネル１の車内側の全部（一部であってもよい）を覆うようにして取付けられるものであり、独立気泡層１１、連続気泡層１２および繊維質吸音材１３とで構成される。   These sound-insulating sheets 10 are attached between the automobile door inner panel 1 and the interior door trim 2 so as to cover the entire vehicle interior of the door inner panel 1 (or a part thereof). Yes, it is composed of a closed cell layer 11, an open cell layer 12, and a fibrous sound absorbing material 13.

独立気泡層１１と連続気泡層１２はＥＰＤＭ、ＣＲ、ＳＢＲ、ＮＢＲ等の合成ゴムで形成することができるが、本実施形態では、比重をコントロールし易いといった点からＥＰＤＭで形成している。また、繊維質吸音材１３は、シンサレート（商品名）、ウレタンチップフェルトまたはレジンフェルトで形成する。いずれの材料も遮音効果に大差はない。   The closed cell layer 11 and the open cell layer 12 can be formed of synthetic rubber such as EPDM, CR, SBR, NBR, etc., but in this embodiment, they are formed of EPDM from the viewpoint of easy control of specific gravity. Further, the fibrous sound absorbing material 13 is formed of cinsallate (trade name), urethane chip felt or resin felt. There is no big difference in the sound insulation effect of any material.

全ての遮音性シート１０において、独立気泡層１１を最も車外側に配置することによって、当該独立気泡層１１が有する優れた防水効果によって、雨水等が車内へ侵入することを車外側において防止し、自動車ドアの防水性を高めている。また、それより車内側に連続気泡層１２と繊維質吸音材１３を配置し、それらの持つより優れた遮音効果により、１０００Ｈｚ近くの騒音に対する遮音性を高めている。   In all the sound insulating sheets 10, by disposing the closed cell layer 11 on the outermost side of the vehicle, rainwater and the like can be prevented from entering the vehicle by the excellent waterproof effect of the closed cell layer 11, on the outside of the vehicle, Improves waterproofing of automobile doors. In addition, the open cell layer 12 and the fibrous sound absorbing material 13 are arranged on the inner side of the vehicle, and the sound insulation effect against noise near 1000 Hz is enhanced by their superior sound insulation effect.

なお、本発明に係る遮音性シート１０は、図２および図３に示すように、独立気泡層１１、連続気泡層１２および繊維質吸音材１３をそれぞれ一層ずつ形成しても良いし、図４乃至図６に示すように、独立気泡層１１や連続気泡層１２（あるいは繊維質吸音材１３）を二層（またはそれ以上）とすることもできる。また、その配置も必要に応じて適宜設定することができる。   In addition, as shown in FIGS. 2 and 3, the sound insulating sheet 10 according to the present invention may form the closed cell layer 11, the open cell layer 12, and the fibrous sound absorbing material 13 one by one. Thru | or FIG. 6, the closed-cell layer 11 and the open-cell layer 12 (or fibrous sound-absorbing material 13) can also be made into two layers (or more). Further, the arrangement can be appropriately set as necessary.

次に、図１、図７および図８を参照して、本発明の第二実施形態に係る遮音性シート１０について説明する。図７および図８は、本発明の第二実施形態に係る遮音性シート１０を示すもので、図１のＡ−Ａ線断面図である。
この遮音性シート１０も、自動車のドアインナーパネル１の車内側に取付けられるもので、独立気泡層１１と繊維質吸音材１３とで構成される。図７に示す遮音性シート１０は、独立気泡層１１と繊維質吸音材１３とを一層ずつ形成しているが、図８に示す遮音性シート１０では独立気泡層１１を二層形成し、遮音性と共に防水性をより高めている。なお、繊維質吸音材１３を二層以上設けることもできる。 Next, the sound insulating sheet 10 according to the second embodiment of the present invention will be described with reference to FIG. 1, FIG. 7, and FIG. 7 and 8 show the sound insulating sheet 10 according to the second embodiment of the present invention, and are sectional views taken along line AA of FIG.
This sound insulating sheet 10 is also attached to the inner side of the door inner panel 1 of the automobile, and is composed of a closed cell layer 11 and a fibrous sound absorbing material 13. The sound insulating sheet 10 shown in FIG. 7 forms the closed cell layer 11 and the fibrous sound absorbing material 13 one by one. However, the sound insulating sheet 10 shown in FIG. The waterproofness is further enhanced with the characteristics. Two or more layers of the fibrous sound absorbing material 13 can be provided.

次に、図１、図９および図１０を参照して、本発明の第三実施形態に係る遮音性シート１０について説明する。図９および図１０は、本発明の第三実施形態に係る遮音性シート１０を示すもので、図１のＡ−Ａ線断面図である。
この遮音性シート１０は、同様に、自動車のドアインナーパネル１の車内側に取付けられるものであり、連続気泡層１２と繊維質吸音材１３とで構成される。連続気泡層１２および繊維質吸音材１３ともに遮音効果に特に優れるので１０００Ｈｚ近くの騒音を含め、あらゆる周波数の騒音に対する遮音性に優れる。なお、連続気泡層１２および繊維質吸音材１３の数およびそれらの配置は限定されない。 Next, the sound insulating sheet 10 according to the third embodiment of the present invention will be described with reference to FIG. 1, FIG. 9, and FIG. 9 and 10 show the sound insulating sheet 10 according to the third embodiment of the present invention, and are sectional views taken along line AA in FIG.
Similarly, the sound insulating sheet 10 is attached to the inner side of the door inner panel 1 of the automobile, and includes an open cell layer 12 and a fibrous sound absorbing material 13. Since both the open cell layer 12 and the fibrous sound absorbing material 13 are particularly excellent in sound insulation effect, they are excellent in sound insulation against noise of all frequencies including noise near 1000 Hz. In addition, the number of the open cell layers 12 and the fibrous sound-absorbing material 13 and their arrangement are not limited.

本発明者らは、本発明の実施形態に係る遮音性シート１０の遮音効果について実験を行い、他のシートと比較した。
図１１に示す表は、本発明の実施形態に係る遮音性シート１０の透過音を、他のシートの透過音と共に示したものである。ここで、「ＮＩシート」とは、前述したように、独立気泡層１１と連続気泡層１２を積層したシートを言う。この表に示すように、従来のシート（「ＮＩシート３枚」および「ＮＩシート４枚」）と比較して、本発明の実施形態に係る遮音性シート１０（「ＮＩシート＋シンサレート」，「ＮＩシート＋フェルト」，「ＮＩシート＋シンサレート＋ＮＩシート」および「ＮＩシート＋フェルト＋ＮＩシート」）の１０００Ｈｚ近くにおける透過音数値は相対的に低い。このことから、本発明の実施形態に係る遮音性シート１０の遮音効果は、従来のシートと比較して優れていることが分かる。 The present inventors conducted an experiment on the sound insulation effect of the sound insulation sheet 10 according to the embodiment of the present invention and compared it with other sheets.
The table shown in FIG. 11 shows the transmitted sound of the sound insulating sheet 10 according to the embodiment of the present invention together with the transmitted sound of other sheets. Here, the “NI sheet” refers to a sheet in which the closed cell layer 11 and the open cell layer 12 are laminated as described above. As shown in this table, compared with the conventional sheets (“NI sheet 3 sheets” and “NI sheet 4 sheets”), the sound insulating sheet 10 (“NI sheet + cinsalate”, “ NI sheet + felt ”,“ NI sheet + cinsalate + NI sheet ”and“ NI sheet + felt + NI sheet ”) have relatively low transmitted sound values near 1000 Hz. From this, it can be seen that the sound insulation effect of the sound insulation sheet 10 according to the embodiment of the present invention is superior to the conventional sheet.

図１２に示す表は、本発明の実施形態に係る遮音性シート１０の透過損失を、他のシートの透過損失と共に示したものである。また、図１３は、その表に示す数値をグラフ化したものである。なお、前述した図１４に示すグラフも、この表を元に作成したものである（但し、当該表から、「ＮＩシート１枚」および「シンサレート１枚のみ」の数値は削除している）。   The table shown in FIG. 12 shows the transmission loss of the sound insulating sheet 10 according to the embodiment of the present invention together with the transmission loss of other sheets. FIG. 13 is a graph of the numerical values shown in the table. The graph shown in FIG. 14 described above is also created based on this table (however, the numerical values of “one sheet of NI” and “one sheet of synthate” are deleted from the table).

この表およびグラフから分かるように、１０００Ｈｚよりやや低い領域では、本発明の実施形態に係る遮音性シート１０（「（３）ＮＩシート＋シンサレート」）の透過損失が最も高く、従来のシートと比較して、遮音性に優れていることが分かる。なお、本発明の実施形態に係る他の遮音性シート１０（「（５）ＮＩシート＋シンサレート＋ＮＩシート」および「（６）ＮＩシート＋フェルト＋ＮＩシート」）は、１０００Ｈｚよりやや低い領域での遮音性と共に、それ以上の領域での遮音性にも優れている。   As can be seen from this table and graph, in the region slightly lower than 1000 Hz, the sound insulation sheet 10 (“(3) NI sheet + cinsalate”) according to the embodiment of the present invention has the highest transmission loss, compared with the conventional sheet. And it turns out that it is excellent in sound insulation. In addition, other sound insulation sheets 10 according to the embodiment of the present invention (“(5) NI sheet + cinsalate + NI sheet” and “(6) NI sheet + felt + NI sheet”) have sound insulation in a region slightly lower than 1000 Hz. In addition to its properties, it has excellent sound insulation in areas beyond that.

なお、上記実施形態では、遮音性シートを自動車のドアに取付けて使用する場合について説明したが、本発明はこうした使用に限定されるものではなく、電車や飛行機などの他の乗り物や、建物などにも適用することができる。   In the above embodiment, the case where the sound insulating sheet is used by being attached to an automobile door has been described, but the present invention is not limited to such use, and other vehicles such as trains and airplanes, buildings, and the like. It can also be applied to.

本発明の実施形態に係る遮音性シートを自動車ドアに取付ける状態を示す分解斜視図である。It is a disassembled perspective view which shows the state which attaches the sound insulation sheet which concerns on embodiment of this invention to a motor vehicle door. 本発明の第一実施形態に係る遮音性シートを示すもので、図１のＡ−Ａ線断面図である。1 shows a sound insulating sheet according to a first embodiment of the present invention, and is a cross-sectional view taken along line AA of FIG. 本発明の第一実施形態に係る遮音性シートの他の態様を示すもので、図１のＡ−Ａ線断面図である。The other aspect of the sound-insulating sheet | seat which concerns on 1st embodiment of this invention is shown, and it is the sectional view on the AA line of FIG. 本発明の第一実施形態に係る遮音性シートのさらに他の態様を示すもので、図１のＡ−Ａ線断面図である。The further another aspect of the sound-insulating sheet | seat which concerns on 1st embodiment of this invention is shown, and it is the sectional view on the AA line of FIG. 本発明の第一実施形態に係る遮音性シートのまたさらに他の態様を示すもので、図１のＡ−Ａ線断面図である。FIG. 3 is a cross-sectional view taken along line AA in FIG. 1, showing still another aspect of the sound insulating sheet according to the first embodiment of the present invention. 本発明の第一実施形態に係る遮音性シートのさらに他の態様を示すもので、図１のＡ−Ａ線断面図である。The further another aspect of the sound-insulating sheet | seat which concerns on 1st embodiment of this invention is shown, and it is the sectional view on the AA line of FIG. 本発明の第二実施形態に係る遮音性シートを示すもので、図１のＡ−Ａ線断面図である。The sound-insulating sheet | seat which concerns on 2nd embodiment of this invention is shown, and it is the sectional view on the AA line of FIG. 本発明の第二実施形態に係る遮音性シートの他の態様を示すもので、図１のＡ−Ａ線断面図である。The other aspect of the sound-insulating sheet | seat which concerns on 2nd embodiment of this invention is shown, and it is the sectional view on the AA line of FIG. 本発明の第三実施形態に係る遮音性シートを示すもので、図１のＡ−Ａ線断面図である。The sound-insulating sheet | seat which concerns on 3rd embodiment of this invention is shown, and it is the sectional view on the AA line of FIG. 本発明の第三実施形態に係る遮音性シートの他の態様を示すもので、図１のＡ−Ａ線断面図である。The other aspect of the sound-insulating sheet | seat which concerns on 3rd embodiment of this invention is shown, and it is the sectional view on the AA line of FIG. 本発明の実施形態に係る遮音性シートの透過音の実験結果を示す表である。It is a table | surface which shows the experimental result of the transmitted sound of the sound insulation sheet which concerns on embodiment of this invention. 本発明の実施形態に係る遮音性シートの透過損失の実験結果を示す表である。It is a table | surface which shows the experimental result of the transmission loss of the sound insulation sheet | seat which concerns on embodiment of this invention. 本発明の実施形態に係る遮音性シートの透過損失の実験結果を示すグラフである。It is a graph which shows the experimental result of the transmission loss of the sound-insulating sheet | seat which concerns on embodiment of this invention. 本発明の実施形態に係る遮音性シートの透過損失の実験結果を示す他のグラフである。It is another graph which shows the experimental result of the transmission loss of the sound-insulating sheet | seat which concerns on embodiment of this invention. 本出願人が先に出願したシートを示す断面図である。It is sectional drawing which shows the sheet | seat which this applicant applied previously. 本出願人が先に出願したシートおよび他の材料からなるシートの吸音率を示すグラフである。It is a graph which shows the sound absorption coefficient of the sheet | seat which consists of the sheet | seat which the present applicant applied previously, and another material.

符号の説明Explanation of symbols

１ ドアインナーパネル
２ 内装用ドアトリム
１０ 遮音性シート
１１ 独立気泡層
１１ａ 独立気泡
１２ 連続気泡層（半連続気泡層）
１２ａ 連続気泡
１３ 繊維質吸音材 DESCRIPTION OF SYMBOLS 1 Door inner panel 2 Door trim for interior 10 Sound insulation sheet 11 Closed cell layer 11a Closed cell 12 Open cell layer (semi-open cell layer)
12a Open cell 13 Fibrous sound absorbing material

Claims (9)

任意の数の独立気泡層と連続気泡層と繊維質吸音材とを、任意の順に積層してなることを特徴とする遮音性シート。   A sound insulating sheet comprising an arbitrary number of closed cell layers, open cell layers, and fibrous sound-absorbing material laminated in an arbitrary order. 任意の数の独立気泡層と繊維質吸音材とを、任意の順に積層してなることを特徴とする遮音性シート。   A sound insulating sheet comprising an arbitrary number of closed cell layers and a fibrous sound absorbing material laminated in an arbitrary order. 任意の数の連続気泡層と繊維質吸音材とを、任意の順に積層してなることを特徴とする遮音性シート。   A sound insulating sheet, wherein an arbitrary number of open cell layers and a fibrous sound absorbing material are laminated in an arbitrary order. 車両ドアインナーパネルの車内側の一部または全部を覆うべく、任意の数の独立気泡層と連続気泡層と繊維質吸音材とを、任意の順に積層してなることを特徴とする遮音性シート。   A sound insulating sheet comprising an arbitrary number of closed cell layers, open cell layers, and fibrous sound-absorbing materials laminated in any order so as to cover a part or all of the vehicle door inner panel. . 車両ドアインナーパネルの車内側の一部または全部を覆うべく、任意の数の独立気泡層と繊維質吸音材とを、任意の順に積層して構成してなることを特徴とする遮音性シート。   A sound-insulating sheet comprising: an arbitrary number of closed cell layers and a fibrous sound-absorbing material laminated in any order so as to cover a part or all of a vehicle door inner panel. 車両ドアインナーパネルの車内側の一部または全部を覆うべく、任意の数の連続気泡層と繊維質吸音材とを、任意の順に積層してなることを特徴とする遮音性シート。   A sound insulating sheet comprising an arbitrary number of open cell layers and a fibrous sound absorbing material laminated in an arbitrary order so as to cover a part or all of a vehicle door inner panel. 最も車外側に位置する層を前記独立気泡層としてなることを特徴とする請求項４または５に記載の遮音性シート。   The sound insulating sheet according to claim 4 or 5, wherein a layer located on the outermost side of the vehicle is the closed cell layer. 最も車外側に位置する層を前記連続気泡層としてなることを特徴とする請求項６に記載の遮音性シート。   The sound insulation sheet according to claim 6, wherein a layer located on the outermost side of the vehicle is the open cell layer. 前記繊維質吸音材がウレタンチップフェルトまたはレジンフェルトであることを特徴とする請求項１乃至８のうちいずれか一つに記載の遮音性シート。   The sound insulating sheet according to any one of claims 1 to 8, wherein the fibrous sound absorbing material is urethane chip felt or resin felt.
JP2004221756A 2004-07-29 2004-07-29 Sound insulating sheet Pending JP2006039379A (en)

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JP2004221756A JP2006039379A (en) 2004-07-29 2004-07-29 Sound insulating sheet
US11/168,730 US20060021823A1 (en) 2004-07-29 2005-06-28 Noise isolation sheet
CNA2005100809055A CN1727631A (en) 2004-07-29 2005-06-28 Noise isolation sheet
GB0515412A GB2416737B (en) 2004-07-29 2005-07-27 Noise isolataion sheet

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