US20040201246A1 - Noise isolation sheet - Google Patents

Noise isolation sheet Download PDF

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Publication number
US20040201246A1
US20040201246A1 US10/809,606 US80960604A US2004201246A1 US 20040201246 A1 US20040201246 A1 US 20040201246A1 US 80960604 A US80960604 A US 80960604A US 2004201246 A1 US2004201246 A1 US 2004201246A1
Authority
US
United States
Prior art keywords
sheet
noise isolation
door
noise
water absorption
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/809,606
Other languages
English (en)
Inventor
Hiroaki Miyahara
Shinichiro Emori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nishikawa Rubber Co Ltd
Original Assignee
Nishikawa Rubber Co Ltd
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.)
Filing date
Publication date
Application filed by Nishikawa Rubber Co Ltd filed Critical Nishikawa Rubber Co Ltd
Assigned to NISHIKAWA RUBBER CO., LTD. reassignment NISHIKAWA RUBBER CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: EMORI, SHINICHIRO, MIYAHARA, HIROAKI
Publication of US20040201246A1 publication Critical patent/US20040201246A1/en
Priority to US11/249,953 priority Critical patent/US7350848B2/en
Abandoned legal-status Critical Current

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Classifications

    • 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
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J5/00—Doors
    • B60J5/04—Doors arranged at the vehicle sides
    • B60J5/0412—Lower door structure
    • B60J5/0418—Water or sound barrier, e.g. watershields or seals between dry/wet compartment, sound or vibration dampers
    • 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
    • B32B2266/02—Organic
    • B32B2266/0207—Materials belonging to B32B25/00
    • 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
    • B32B2307/70—Other properties
    • B32B2307/726—Permeability to liquids, absorption
    • 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

Definitions

  • This invention relates to a noise isolation sheet provided to cover a panel, e.g., a door inner panel which is installed inside an automobile door.
  • FIG. 3 there have been a known method of insulating noise in the interior of a door 60 , wherein a felt 2 or urethane is attached to the backside of an interior door trim 1 which is provided to the inner side of a door inner panel, or an urethane-made article is attached to the side of the door inner panel.
  • the examined utility model application publication No. H5-23375 discloses a door trim which is provided with a pad material made of urethane foam and the like.
  • the published patent application No. H10-119159 discloses a noise isolation cover made of urethane foam.
  • the noise insulating effect is not satisfactory because the felt 2 , urethane, pad material and isolation cover are all made independently and they are installed merely partially to the side of the door trim 1 or the inner side of the door inner panel.
  • the inner weather strip 15 is composed of an installation base 16 , seal lip portions 17 and 18 provided up and down for elastically making contacts with a door glass 70 which slides in the upward and downward directions from inner side, and a support portion 19 which is prolonged downwardly from the installation base 16 for supporting the seal lip portions 17 and 18 .
  • the installation base 16 is inserted into a concave portion 13 formed on the upper portion of the door trim 12 , while each of the position adjustment protrusions 16 b makes a contact with a corresponding step portion 13 a for adjusting in a proper position.
  • the door trim 12 is fixed to a door inner panel 11 with clips 50 .
  • the noise isolation sheet 20 is provided by merely hanging the sheet 20 from the upside to the downside, so that an installation operation is easy.
  • a noise isolation sheet ( 100 ) as claimed in claim 1 .
  • the noise isolation sheet ( 100 ) partially or wholly covers a panel ( 11 ) provided inside a car door ( 60 ).
  • the noise isolation sheet ( 100 ) is at least a double layer comprising an outer side sheet ( 101 ) and an inner side sheet ( 102 ).
  • the outer side sheet ( 101 ) is a sheet made of a foam body having water absorption of less than 30%
  • the inner side sheet ( 102 ) is a sheet made of a foam body having water absorption of 30% or more.
  • noise isolation sheet ( 100 ) as claimed in claim 2 wherein the noise isolation sheet ( 100 ) is provided to a car door which comprises a door inner panel ( 11 ) and an interior door trim ( 12 ).
  • the door trim ( 12 ) is provided inside the door inner panel ( 11 ).
  • the noise isolation sheet ( 100 ) partially or wholly covers the door inner panel ( 11 ).
  • the noise isolation sheet ( 100 ) is at least a double layer comprising an outer side sheet ( 101 ) and an inner side sheet ( 102 ).
  • the outer side sheet ( 101 ) is a sheet made of a foam body having water absorption of less than 30%
  • the inner side sheet ( 102 ) is a sheet made of a foam body having water absorption of 30% or more.
  • the noise isolation sheet which covers a panel provided inside a door, is at least a double layer and is provided with an outer side sheet at the outer side thereof having water absorption of less than 30%, so that it enables to prevent water from invading from the outside of a car and to improve the noise insulating property as well.
  • an inner side sheet at the inner side which is made of a foam body having water absorption of 30% or more, so that the noise absorption property in the material can be improved through a wider range in a frequency band.
  • both the outer side sheet and inner side sheet are made of foam bodies so that the noise isolation sheet can be reduced in weight.
  • FIG. 1 is a sectional view showing a primary portion of a noise isolation sheet according to the preferred embodiment of the invention.
  • FIG. 2 is a graph showing frequency characteristics of a noise isolation sheet according to the preferred embodiment of the invention and a noise isolation sheet compared with the sheet of the invention.
  • FIG. 3 is a perspective view showing an outlook of a door comprising a felt according to the prior art.
  • FIG. 4 is an perspective view showing an outlook of a door comprising a noise isolation sheet according to an invention the applicant of this invention formally filed.
  • FIG. 5 is an enlarged section view along line A-A in FIG. 4.
  • FIG. 6 is a perspective view showing a disassembled door to which a noise isolation sheet the applicant of this invention formally filed is installed.
  • FIG. 1 is a section view showing a primary portion of the noise isolation sheet 100 according to the preferred embodiment of the invention. It should be noted that the noise isolation sheet 100 in this embodiment is installed in place of the noise isolation sheet 20 illustrated in FIGS. 4 to 6 .
  • the noise isolation sheet 100 is provided between a door inner panel 11 installed inside a car door 60 and an interior door trim 12 installed inside the door inner panel 11 , hanging just like a curtain from the upside to the downside, thereby covering the entire portion of the door inner panel 11 .
  • the noise isolation sheet 100 may be arranged to partially cover the inner panel 11 instead.
  • the noise isolation sheet 100 may be fixed with sealer, clips and the like at the end portion thereof.
  • the noise isolation sheet 100 is secured to the door inner panel 11 or door trim 12 at the top edge thereof
  • the door trim 12 is fixed to the door inner panel with clips 50 .
  • the noise isolation sheet 100 may be secured to the inner weather strip 15 , which is secured to the door trim 12 , at the upper end thereof (In this case, the inner weather strip 15 may be secured to the door inner panel 11 instead of the door trim 12 .)
  • the noise isolation sheet 100 is a double layer comprising an outer side sheet 101 provided at the outer side thereof and an inner side sheet 102 provided at the inner side thereof.
  • the outer side sheet 101 is a sheet made of a foam body having water absorption of less than 30%
  • the inner side sheet 102 is a sheet made of a foam body having water absorption of 30% or more.
  • the outer side sheet 101 includes, for example, a foam body having a plurality of closed cells which are dotted inside thereof, and having water absorption of less than 30%.
  • the inner side sheet 102 includes, for example, a foam body having a plurality of closed cells as well as continuous cells 112 which are formed with some of the closed cells adjacently taking place and communicating with each other, and having water absorption of 30% or more.
  • the noise isolation sheet 100 is roughly rectangular and it is made, though not critical, of those materials such as EPDM, CR, SBR, NBR and the like. Among those materials, it is preferable to choose EPDM in a point of view that it is highly foamed easily and is easily controlled in fixing a density thereof into a desired one. When EPDM is used, for example, it is preferred that the density thereof is fixed to 0.10 to 0.15.
  • the noise isolation sheet 100 may be made of a laminated sheet comprising at least two layers, which includes a sheet made of a foam body having water absorption of less than 30% and a sheet made of a foam body having water absorption of 30% or more, wherein both sheets are bound together with an adhesive agent, clips or the like. Further, the noise isolation sheet 100 may be formed by a process of placing two particular sheets in a mold, wherein water absorption of either one is to become less than 30% and that of the other is to become 30% or more after a vulcanization process, followed by a process of heating the sheets to unify each other. Moreover, there is another method of forming the noise isolation sheet 100 wherein a sheet having at least two layers is formed by co-extrusion and is heated to form a laminated sheet having a plurality of layers.
  • noise isolation sheet 100 formed in any one of the methods described above, there is provided two rooms between a door inner panel 11 and a door trim 12 through the intermediary of the sheet 100 , so that the noise insulating property improves.
  • the noise isolation sheet 100 is a double layer including a sheet 101 having water absorption of less than 30%, so that water is prevented from invading from the outside and the noise insulating property can be improved.
  • the noise isolation sheet 100 comprises a sheet 102 at the inner side of a car having water absorption of 30% or more, so that the noise absorbing property in the material can be improved through wider range of a frequency band.
  • the noise isolation sheet (the sheet 100 described in the preferred embodiment of the invention) composed of an outer side sheet 101 having water absorption of less than 30% and an inner side sheet 102 having water absorption of 30% or more is higher in the noise absorption coefficient in the high frequency band of 500 Hz to 6400 Hz compared to the sheet composed merely of an outer side sheet 101 having water absorption of less than 30%.
  • the noise absorption coefficient of the sheet 100 exhibits the peak value of 0.7 around the frequency of 2500 Hz.
  • the noise isolation sheet 100 are composed of two layers including the outer side sheet 101 and the inner side sheet 102 though, the sheet 100 may be formed of more than two layers to further improve the water proofing and noise insulating effects.
US10/809,606 2003-04-11 2004-03-24 Noise isolation sheet Abandoned US20040201246A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US11/249,953 US7350848B2 (en) 2003-04-11 2005-10-13 Noise isolation sheet

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2003-108129 2003-04-11
JP2003108129 2003-04-11
JP2004-20415 2004-01-28
JP2004020415A JP3875974B2 (ja) 2003-04-11 2004-01-28 遮音性シート

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US11/249,953 Continuation-In-Part US7350848B2 (en) 2003-04-11 2005-10-13 Noise isolation sheet

Publications (1)

Publication Number Publication Date
US20040201246A1 true US20040201246A1 (en) 2004-10-14

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
US10/809,606 Abandoned US20040201246A1 (en) 2003-04-11 2004-03-24 Noise isolation sheet
US11/249,953 Active 2024-08-12 US7350848B2 (en) 2003-04-11 2005-10-13 Noise isolation sheet

Family Applications After (1)

Application Number Title Priority Date Filing Date
US11/249,953 Active 2024-08-12 US7350848B2 (en) 2003-04-11 2005-10-13 Noise isolation sheet

Country Status (4)

Country Link
US (2) US20040201246A1 (ja)
JP (1) JP3875974B2 (ja)
CN (1) CN100418809C (ja)
GB (1) GB2400580B (ja)

Cited By (8)

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US20050073171A1 (en) * 2003-10-06 2005-04-07 Nishikawa Rubber Co., Ltd. Car door structure
US20060049662A1 (en) * 2003-04-11 2006-03-09 Nishikawa Rubber Co., Ltd. Noise isolation sheet
US20060261633A1 (en) * 2005-05-23 2006-11-23 Jay Winborn Automobile door assemblies
US20060265962A1 (en) * 2005-05-23 2006-11-30 Jay Winborn Snap-on barrier panels for automobile door panel assemblies
US20060265963A1 (en) * 2005-05-23 2006-11-30 Jay Winborn Manipulable engagement assemblies for barrier panels
US20070046064A1 (en) * 2005-08-29 2007-03-01 Jay Winborn Multi-sheet barrier panel for automobile door assemblies
CN102285346A (zh) * 2011-06-07 2011-12-21 上海子元汽车零部件有限公司 用于汽车内部的隔音块结构
GB2521348A (en) * 2013-12-04 2015-06-24 Nathan Lewis Automotive water shedder

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US20070156382A1 (en) * 2005-12-29 2007-07-05 Graham James L Ii Systems and methods for designing experiments
JP5276099B2 (ja) 2007-07-03 2013-08-28 スリーエム イノベイティブ プロパティズ カンパニー タイムスロットサンプルにコンテンツの複数小片を割り当てて、その割り当てられたコンテンツの効果を測定するためのシステム及び方法
KR101605919B1 (ko) 2007-07-03 2016-03-24 쓰리엠 이노베이티브 프로퍼티즈 컴파니 배정된 컨텐츠의 효과를 측정하기 위해 컨텐츠가 배정될 수 있는 시간 슬롯 샘플을 발생시키는 시스템 및 방법
US20090012847A1 (en) * 2007-07-03 2009-01-08 3M Innovative Properties Company System and method for assessing effectiveness of communication content
DE102007032728A1 (de) * 2007-07-13 2009-01-15 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Dämmanordnung
JP2009248964A (ja) * 2008-04-11 2009-10-29 Nishikawa Rubber Co Ltd 自動車用ドア構造
JP5625386B2 (ja) * 2010-02-25 2014-11-19 トヨタ自動車株式会社 サービスホールのシール構造
CN104442611A (zh) * 2013-09-20 2015-03-25 西川橡胶工业股份有限公司 防水用密封件以及使用了该防水用密封件的密封方法
JP6349342B2 (ja) * 2015-07-16 2018-06-27 西川ゴム工業株式会社 自動車のドアホールシール
EP3118064B1 (en) 2015-07-16 2018-06-13 Nishikawa Rubber Co., Ltd. Door hole seal for automobile
JP6715649B2 (ja) * 2016-03-31 2020-07-01 三井化学株式会社 音響特性測定システムおよび音響特性測定方法
FR3052718B1 (fr) * 2016-06-16 2019-08-09 Faurecia Automotive Industrie Procede de fabrication d'une piece d'equipement automobile et piece associee
JP6872924B2 (ja) * 2017-02-14 2021-05-19 西川ゴム工業株式会社 防音材
JP6908418B2 (ja) * 2017-04-11 2021-07-28 西川ゴム工業株式会社 ウェザーストリップ
WO2018220779A1 (ja) * 2017-06-01 2018-12-06 河西工業株式会社 自動車用内装トリム材に対する吸音材の取付け固定構造
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US20060049662A1 (en) * 2003-04-11 2006-03-09 Nishikawa Rubber Co., Ltd. Noise isolation sheet
US7350848B2 (en) 2003-04-11 2008-04-01 Nishikawa Rubber Co., Ltd. Noise isolation sheet
US20050073171A1 (en) * 2003-10-06 2005-04-07 Nishikawa Rubber Co., Ltd. Car door structure
US6979048B2 (en) * 2003-10-06 2005-12-27 Nishikawa Rubber Co., Ltd. Car door structure
US20060261633A1 (en) * 2005-05-23 2006-11-23 Jay Winborn Automobile door assemblies
US20060265962A1 (en) * 2005-05-23 2006-11-30 Jay Winborn Snap-on barrier panels for automobile door panel assemblies
US20060265963A1 (en) * 2005-05-23 2006-11-30 Jay Winborn Manipulable engagement assemblies for barrier panels
US20070046064A1 (en) * 2005-08-29 2007-03-01 Jay Winborn Multi-sheet barrier panel for automobile door assemblies
CN102285346A (zh) * 2011-06-07 2011-12-21 上海子元汽车零部件有限公司 用于汽车内部的隔音块结构
GB2521348A (en) * 2013-12-04 2015-06-24 Nathan Lewis Automotive water shedder

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CN100418809C (zh) 2008-09-17
US7350848B2 (en) 2008-04-01
CN1535869A (zh) 2004-10-13
JP3875974B2 (ja) 2007-01-31
GB2400580A (en) 2004-10-20
JP2004323002A (ja) 2004-11-18
US20060049662A1 (en) 2006-03-09
GB0408225D0 (en) 2004-05-19
GB2400580B (en) 2006-01-11

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