JP2006039379A - Sound insulating sheet - Google Patents

Sound insulating sheet Download PDF

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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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cell layer
absorbing material
sound absorbing
sheet
noise isolation
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Shinichirou Emori
Yoshihiro Obara
Yasuyoshi Suzaki
義弘 小原
真一郎 江盛
康義 須崎
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Nishikawa Rubber Co Ltd
西川ゴム工業株式会社
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/22Layered 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
    • B32B5/24Layered 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
    • B32B5/245Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/18Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/22Layered 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
    • B32B5/24Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered 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
    • B32B5/22Layered 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
    • B32B5/32Layered 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R13/00Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
    • B60R13/08Insulating elements, e.g. for sound insulation
    • B60R13/0815Acoustic or thermal insulation of passenger compartments
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10KSOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00Methods 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
    • G10K11/16Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162Selection of materials
    • G10K11/168Plural layers of different materials, e.g. sandwiches
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00Composition of foam
    • B32B2266/06Open cell foam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00Composition of foam
    • B32B2266/08Closed cell foam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00Condition, form or state of the layers or laminate
    • B32B2305/02Cellular or porous
    • B32B2305/022Foam
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2305/00Condition, form or state of the layers or laminate
    • B32B2305/10Fibres of continuous length
    • B32B2305/20Fibres of continuous length in the form of a non-woven mat
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/10Properties of the layers or laminate having particular acoustical properties
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/10Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102Insulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00Vehicles
    • B32B2605/08Cars

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 is, for example, to a noise isolation sheet for use as a sheet to be attached to the interior side of the motor vehicle 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。 Conventionally, a vehicle interior side of the motor vehicle door, various sound insulation measures are taken for the purpose of entering or leakage of noise. 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。 For example, Paste felt or urethane on the back surface of the interior trim attached to the interior side of the door inner panel, sticking Keru means is devised urethane molded article to the door inner panel.

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)。 The present applicant, in order to further improve the sound insulation in such prior art, as shown in FIG. 15, foam closed cell 11a has countless interspersed with (closed cell layer 11), adjacent closed cell 11a is invented sound insulation sheet foam open cell 12a is scattered communicating the (open cell layer 12) are stacked, and previously filed (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)。 Furthermore, it has been invented also sound-absorbing material for absorbing the noise caused by the intake of the internal combustion engine so far (for example, see Patent Documents 1 and 2).
特開平8−146967号公報 JP-8-146967 discloses 特許第2503215号公報 Patent No. 2503215 Publication

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。 However, noise isolation sheet by the present applicant filed previously, so far superior to the felts and sound insulation than those were adhered urethane, and as shown in FIG. 16, 3000 Hz sound insulation of noise before and after the high-frequency region, and although excellent in sound absorbing performance, sound insulation near 1000Hz noise, and the sound absorbing performance has been left room for further improvement. 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。 In the figure, "(1) NI sheet" is noise isolation sheet by the present applicant filed previously. 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。 In addition, "(2) Thinsulate" is the trade name of Sumitomo 3M Ltd., "(3) chip felt" in the urethane chip felt, "(4) pet felt" is a resin felt, both specific gravity 0 a fiber-based sound absorbing material of about .02. 「(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。 "(5) soft urethane" is of spongy, polyol, a foam soft foamed polyisocyanate as a main component, is of the order of specific gravity 0.02. なお括弧内の「t」は肉厚(mm)を意味する。 The "t" in parentheses denotes 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。 Also, the sound absorbing material of Patent Document 1 is only superior sound absorption effect in the areas such 100Hz~300Hz, not sufficient for the sound absorption effect of near 1000 Hz. 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。 Sound absorbing material of Patent Document 2 is also not sufficient for sound absorption effect of 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, it is an object of the invention described in the present invention is to provide a noise isolation sheet to exhibit sufficient sound insulation against nearby 1000Hz noise.

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。 To achieve the above object, sound insulating sheet (10) according to claim 1 of the present invention, any number of closed cell layer (11) and the open cell layer (12) and the fibrous sound absorbing material (13 ) and a, characterized by comprising laminated in an optional 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)。 Here, the closed cell layer (11) is a foam closed cell (11a) has an infinite number interspersed (see FIG. 15). 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)。 Further, the open cell layer (12) is a continuous bubbles between the adjacent closed cell (11a) is formed to communicate (12a) is interspersed foam (see drawing). 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。 The open cell layer (12) comprises a semi-open cell layer open cell and closed cell (11a) (12a) are both interspersed (not shown).

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。 Noise isolation sheet according to claim 2 (10), any number of closed cell layer (11) and the fibrous sound absorbing material and (13), characterized by comprising laminated in an optional 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。 Noise isolation sheet according to claim 3 (10) may include any number of open cells layer (12) and the fibrous sound absorbing material and (13), characterized by comprising laminated in an optional 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。 Noise isolation sheet according to claim 4 (10), to cover part or all of the interior side of the vehicle door inner panel (1), any number of closed cell layer (11) and the open cell layer (12) a fibrous sound absorbing material and (13), characterized by comprising laminated in an optional 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。 Noise isolation sheet according to claim 5 (10), to cover part or all of the interior side of the vehicle door inner panel (1), any number of closed cell layer (11) and the fibrous sound absorbing material (13 ) and the and characterized by being constituted by stacking in any 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。 Noise isolation sheet according to claim 6 (10), to cover part or all of the interior side of the vehicle door inner panel (1), any number of open cells layer (12) and the fibrous sound absorbing material (13 ) and a, characterized by comprising laminated in an optional 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。 Noise isolation sheet according to claim 7 (10), in the invention described in claim 4 or 5, characterized by comprising a layer located closest to the vehicle exterior as 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。 Noise isolation sheet according to claim 8 (10), in the invention described in claim 6, characterized by comprising a layer located closest to the vehicle exterior as 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。 Noise isolation sheet according to claim 9 (10), in the invention described in any one of claims 1 to 8, the fibrous sound absorbing material (13) is characterized in that it is a 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。 Symbols in parentheses show constituents or items corresponding described best mode for carrying out the drawings and will be described later invention. 従来例で示したものと同一部分には同一符合を付した。 The same parts as those shown in the conventional examples 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 noise isolation sheet according to claim 1 of the present invention, since the laminated fibrous sound absorbing material in addition to the open cell layer and the closed cell layer, by the action of the fibrous sound absorbing material, as shown in FIG. 14 it can exhibit an excellent sound insulation against nearby 1000Hz noise.

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。 The graph shown in FIG. 14 is obtained by displaying the numerical values ​​obtained using four types of noise isolation sheet, by experiment the transmission loss of each noise isolation sheet (TL [dB]). 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。 This result, noise isolation sheet composed of a closed cell layer and the open cell layer and the fibrous sound absorbing material ( "(3) NI sheet + Thinsulate") is, it can be seen that the most excellent sound insulation in the vicinity 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。 Incidentally, the two sheets and the fiber sound-absorbing material with closed cell layer made of open cell layer ( "(4) NI sheet + Thinsulate + NI sheet) and noise isolation sheet according to the present invention constructed out followed it, closed cell layer and conventional sheet constituted by the open cell layer ( "(1) NI sheet"), the sheet composed only of fibrous sound absorbing material ( "(2) one Thinsulate only") is followed in sequence. 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。 Incidentally, noise isolation sheet according to the present invention consists of a closed cell layer and the continuous two sheets made of foam layers and the fibrous sound absorbing material (4) is excellent in most sound insulation in 1000Hz or more areas.
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。 Also, closed cell layer is excellent in waterproof effect in addition to sound insulation, the open cell layer is excelled in sound insulation.

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。 According to the noise isolation sheet according to claim 2, since it is configured by laminating a fibrous sound absorbing material closed cell layer, excellent sound insulation near 1000Hz for noise by the action of the fibrous sound absorbing material. 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。 In addition, by the action of the closed cell layer, also an excellent waterproof effect.

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。 According to the noise isolation sheet according to claim 3, since it is configured by laminating a fibrous sound absorbing material open cell layer, similarly, excellent in sound insulation near 1000Hz against noise. また、連続気泡層のはたらきによっても、遮音性が高い。 Further, by the action of the open cell layer, a high sound insulation.

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 noise isolation sheet according to claim 4, since the laminated fibrous sound absorbing material in addition to the open cell layer and the closed cell layer, excellent sound insulation near 1000Hz for noise, therefore, the vehicle door inner panel by covering the inner side, that the outside noise from entering into the vehicle, also that the interior of the noise leaking to the outside of the vehicle, both can be prevented more effectively.

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。 According to the noise isolation sheet according to claim 5, since the lamination of a closed cell layer and the fibrous sound absorbing material excellent in sound insulation of the near 1000Hz noise, it is possible to increase the car sound insulation effect. 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。 Further, it is possible by the action of the closed cell layer, enhancing the waterproof effect of the vehicle door.

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。 According to the noise isolation sheet according to claim 6, since by laminating a continuous bubble layer and the fibrous sound absorbing material, similarly, excellent sound insulation near 1000Hz for noise, is possible to further enhance the car sound insulation it can. 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。 Furthermore, by good sound insulation of the open cell layer, it exhibits excellent sound insulation.

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 noise isolation sheet according to claim 7, in the invention described in claim 4 or 5, since the layer located closest to the vehicle exterior and the closed cell layer, the excellent waterproof effect possessed by the closed cell layer it is possible to improve the waterproof performance of the vehicle door effectively.

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 noise isolation sheet according to claim 8, in the invention of claim 6, since the layer located closest to the vehicle exterior and the open cell layer, the vehicle door by excellent waterproof effect possessed by the open cell layer it is possible to improve the waterproof effectively.

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 noise isolation sheet according to claim 9, in the invention described in claims 1 to 8, since the fibrous sound absorbing material is a urethane chip felt or resin felt, delivers high sound insulation effect and economic efficiency 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。 Referring to FIGS. 1 to 6, a description will be given of sound insulating sheet 10 according to the first embodiment of the present invention. 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。 Figure 1 is an exploded perspective view showing a mounting state of noise isolation sheet 10 according to the first embodiment. 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。 2 to 6 show respective noise isolation sheet 10 is a sectional view taken along line A-A of 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 noise isolation sheet 10 is provided between the motor vehicle door inner panel 1 and an interior door trim 2, the interior side of the whole of the door inner panel 1 as it is attached to cover (which may be a part) There, it closed cell layer 11, and a continuous bubble layer 12 and the 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。 Closed cell layer 11 and the open cell layer 12 is EPDM, CR, SBR, can be formed of synthetic rubber such as NBR, in this embodiment, it is formed by EPDM terms such easily control the specific gravity. 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。 Further, the fibrous sound absorbing material 13, Thinsulate (trade name), formed urethane chip felt or resin felt. いずれの材料も遮音効果に大差はない。 Any of the material is also not much difference in sound insulation effect.

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。 In all noise isolation sheet 10, prevented by placing the most exterior closed cell layer 11, by superior waterproofing effect possessed by the closed cell layer 11, in the exterior that rainwater from entering into the vehicle, to enhance the water resistance of the car door. 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。 It also more disposed celled layer 12 and the fibrous sound absorbing material 13 on the interior side, the better sound insulation than possessed by them, to enhance the sound insulation near 1000Hz against noise.

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。 Incidentally, noise isolation sheet 10 according to the present invention, as shown in FIGS. 2 and 3, closed cell layer 11, to the open cell layer 12 and the fibrous sound absorbing material 13 may be formed by layer, respectively, FIG. 4 to 6, the closed cell layer 11 and the open cell layer 12 (or fibrous sound absorbing material 13) may also be a two-layer (or more). 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。 Further, it is possible to appropriately set as necessary the arrangement.

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。 Next, with reference to FIGS. 1, 7 and 8, will be described noise isolation sheet 10 according to the second embodiment of the present invention. 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。 7 and 8, shows the noise isolation sheet 10 according to the second embodiment of the present invention, an A-A line sectional view of FIG.
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。 The noise isolation sheet 10 is also intended to be attached to the interior side of the door inner panel 1 of an automobile, and a closed cell layer 11 and the fibrous sound absorbing material 13. 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。 Noise isolation sheet 10 shown in FIG. 7 is a closed cell layer 11 and the fibrous sound absorbing material 13 is formed by layer, the noise isolation sheet 10 in the closed cell layer 11 shown in FIG. 8 to form two layers, sound insulation and further enhanced waterproof with sex. なお、繊維質吸音材13を二層以上設けることもできる。 It is also possible to provide a fibrous sound absorbing material 13 two layers or more.

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。 Next, with reference to FIGS. 1, 9 and 10, will be described noise isolation sheet 10 according to a third embodiment of the present invention. 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。 9 and 10 show a noise isolation sheet 10 according to a third embodiment of the present invention, an A-A line sectional view of FIG.
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。 The sound insulating sheet 10 is likewise, which is attached to the interior side of the door inner panel 1 of an automobile, and a continuous bubble layer 12 and the fibrous sound absorbing material 13. 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。 Since both the open cell layer 12 and the fibrous sound absorbing material 13 is particularly excellent in sound insulation, including noise near 1000 Hz, excellent sound insulation against the noise of all frequencies. 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。 Note that the number and arrangement of their open cell layer 12 and the fibrous sound absorbing material 13 is 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。 The present inventors have, for sound insulation of noise isolation sheet 10 according to the embodiment of the present invention conducted experiments, and compared with other sheets.
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。 Table shown in FIG. 11 is a transmitted sound of noise isolation sheet 10 according to the embodiment of the present invention, shown together with other sheets of the transmitted sound. 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。 Here, "NI sheet", as described above, refers to a laminated with a closed cell layer 11 the open cell layer 12 sheets. 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。 As shown in this table, the conventional seat as compared to ( "NI sheet 3 sheets" and "four NI sheet"), noise isolation sheet 10 according to the embodiment of the present invention ( "NI sheet + Thinsulate", " NI sheet + felt ", the transmitted sound numbers in near 1000Hz of" NI sheet + Thinsulate + NI sheet "and" NI sheet + felt + NI sheet ") is relatively low. 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。 Therefore, sound insulation effect of noise isolation sheet 10 according to the embodiment of the present invention are found to be superior compared to conventional sheets.

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。 Table shown in FIG. 12 is one in which the transmission loss of the sound insulating sheet 10 according to the preferred embodiment of the present invention, shown together with transmission loss of other sheets. 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。 Further, FIG. 13 is a graph of the numerical values ​​shown in the table. 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 graph shown in FIG. 14 described above also is one that created this table based on (however, from the table, the numerical value of "one NI sheet" and "one Thinsulate only" has been deleted).

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。 As it can be seen from the table and graph, compared with the slightly lower area than 1000 Hz, noise isolation sheet 10 according to the embodiment of the present invention ( "(3) NI sheet + Thinsulate") is the highest transmission loss, the conventional sheet to, it can be seen that excellent sound insulation. 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。 Note that other noise isolation sheet 10 according to the embodiment of the present invention ( "(5) NI sheet + Thinsulate + NI sheet" and "(6) NI sheet + Felt + NI sheet") is sound insulation in slightly lower areas than 1000Hz with sex, it has excellent sound insulation in more areas.

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 has described the case of using attach the noise isolation sheet to a car door, the present invention is not limited to such use, other and vehicles such as trains and airplanes, buildings, etc. also it can 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。 The sound insulating sheet according to the embodiment of the present invention is an exploded perspective view showing a state attached to an automobile 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。 It indicates a noise isolation sheet according to the first embodiment of the present invention, an A-A line sectional view 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。 It shows another embodiment of the sound insulating sheet according to the first embodiment of the present invention, an A-A line sectional view 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。 It shows still another embodiment of the sound insulating sheet according to the first embodiment of the present invention, an A-A line sectional view 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。 It shows a still further embodiment of the sound insulating sheet according to the first embodiment of the present invention, an A-A line sectional view 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。 It shows still another embodiment of the sound insulating sheet according to the first embodiment of the present invention, an A-A line sectional view 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。 It indicates a noise isolation sheet according to a second embodiment of the present invention, an A-A line sectional view 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。 It shows another embodiment of the sound insulating sheet according to a second embodiment of the present invention, an A-A line sectional view 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。 It indicates a noise isolation sheet according to a third embodiment of the present invention, an A-A line sectional view 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。 It shows another embodiment of the sound insulating sheet according to a third embodiment of the present invention, an A-A line sectional view 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。 The experimental results of noise isolation sheet transmitted sound according to an embodiment of the present invention is a table showing. 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。 The experimental results of the transmission loss of the sound insulating sheet according to the embodiment of the present invention is a table showing. 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。 The experimental results of the transmission loss of the sound insulating sheet according to the embodiment of the present invention is a graph showing. 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。 Is another graph showing experimental results of the transmission loss of the sound insulating sheet according to the embodiment of the present invention. 本出願人が先に出願したシートを示す断面図である。 The applicant is a sectional view showing a sheet which is previously filed. 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。 The applicant is a graph showing the sound absorption coefficient of the sheet comprising the sheet and other materials previously filed.

符号の説明 DESCRIPTION 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) 1 door inner panel 2 for interior door trim 10 noise isolation sheet 11 closed cell layer 11a closed cell 12 open cell layer (semi-open cell layer)
12a 連続気泡 13 繊維質吸音材 12a celled 13 fibrous sound absorbing material

Claims (9)

  1. 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。 Any noise isolation sheet for the a number of closed cell layer and the open cell layer and the fibrous sound absorbing material, characterized by comprising laminated in an optional order.
  2. 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。 Any and the number of closed cells layer and the fibrous sound absorbing material, sound insulating sheet, characterized by comprising laminated in an optional order.
  3. 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。 Any and the number of open cells layer and the fibrous sound absorbing material, sound insulating sheet, characterized by comprising laminated in an optional order.
  4. 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。 Noise isolation sheet to cover a part or the whole of the interior side of the vehicle door inner panel, and any number of closed cell layer and the open cell layer and the fibrous sound absorbing material, characterized by comprising laminated in any order .
  5. 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。 To cover some or all of the interior side of the vehicle door inner panel, sound insulation sheets and any number of closed cells layer and the fibrous sound absorbing material, and characterized by being constituted by stacking in any order.
  6. 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。 To cover some or all of the interior side of the vehicle door inner panel, sound insulation sheets and any number of open cells layer and the fibrous sound absorbing material, characterized by comprising laminated in an optional order.
  7. 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。 Noise isolation sheet in a layer located closest to the vehicle exterior to claim 4 or 5, characterized in that as the closed cell layer.
  8. 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。 Noise isolation sheet in a layer located closest to the vehicle exterior to claim 6, characterized in that as the open cell layer.
  9. 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。 Noise isolation sheet according to any one of claims 1 to 8, characterized in that the fibrous sound absorbing material is a 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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GB2448468B (en) * 2007-10-08 2009-09-30 Gurit Composite laminated article and manufacture thereof
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