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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JP
Japan
Prior art keywords
sound
insulating sheet
absorbing material
fibrous
cell layer
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2004221756A
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Japanese (ja)
Inventor
Shinichirou Emori
Yoshihiro Obara
Yasuyoshi Suzaki
義弘 小原
真一郎 江盛
康義 須崎
Original Assignee
Nishikawa Rubber Co Ltd
西川ゴム工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Nishikawa Rubber Co Ltd, 西川ゴム工業株式会社 filed Critical Nishikawa Rubber Co Ltd
Priority to JP2004221756A priority Critical patent/JP2006039379A/en
Publication of JP2006039379A publication Critical patent/JP2006039379A/en
Pending legal-status Critical Current

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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

The present invention provides a sound insulating sheet that exhibits a sufficient sound insulating property against noise near 1000 Hz.
An arbitrary number of closed cell layers, an open cell layer, and a fibrous sound absorbing material are laminated in an arbitrary order to block transmission of noise near 1000 Hz. Further, an arbitrary number of closed cell layers 11 and a fibrous sound absorbing material 13 are laminated in an arbitrary order. Furthermore, an arbitrary number of open cell layers 12 and a fibrous sound absorbing material 13 are laminated in an arbitrary order. These seats are used to cover part or all of the inside of the vehicle door inner panel.
[Selection] Figure 2

Description

  The present invention relates to a sound-insulating sheet used as, for example, a seat mounted on the inside of an automobile door.

  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.

  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).

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

  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).

  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.

  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.

  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.

  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).

  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.

  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.

  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.

  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.

  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.

  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).

  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).

  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.

  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.

  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.

  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.

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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

  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.

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.

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.

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.

  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).

  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.

  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.

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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. 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. It is sectional drawing which shows the sheet | seat which this applicant applied previously. 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.

Explanation of symbols

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)

  1.   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.
  2.   A sound insulating sheet comprising an arbitrary number of closed cell layers and a fibrous sound absorbing material laminated in an arbitrary order.
  3.   A sound insulating sheet, wherein an arbitrary number of open cell layers and a fibrous sound absorbing material are laminated in an arbitrary order.
  4.   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. .
  5.   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.
  6.   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.
  7.   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.
  8.   The sound insulation sheet according to claim 6, wherein a layer located on the outermost side of the vehicle is the open cell layer.
  9.   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)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004221756A JP2006039379A (en) 2004-07-29 2004-07-29 Sound insulating sheet

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
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

Publications (1)

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JP2006039379A true JP2006039379A (en) 2006-02-09

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JP (1) JP2006039379A (en)
CN (1) CN1727631A (en)
GB (1) GB2416737B (en)

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JP4635847B2 (en) * 2005-11-30 2011-02-23 トヨタ紡織株式会社 Soundproof material
FR2906637B1 (en) * 2006-09-29 2009-01-09 Faurecia Automotive Ind Snc Insonorization component for rigid automotive structural organ.
US7874400B2 (en) * 2007-09-17 2011-01-25 Premier Innovations, Inc. Noise isolation device for swimming pool pumps and other machinery
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