JPS6345982B2 - - Google Patents
Info
- Publication number
- JPS6345982B2 JPS6345982B2 JP55115969A JP11596980A JPS6345982B2 JP S6345982 B2 JPS6345982 B2 JP S6345982B2 JP 55115969 A JP55115969 A JP 55115969A JP 11596980 A JP11596980 A JP 11596980A JP S6345982 B2 JPS6345982 B2 JP S6345982B2
- Authority
- JP
- Japan
- Prior art keywords
- sound absorbing
- sound
- insulating
- sec
- nonwoven fabric
- 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.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R13/00—Elements for body-finishing, identifying, or decorating; Arrangements or adaptations for advertising purposes
- B60R13/08—Insulating elements, e.g. for sound insulation
- B60R13/0815—Acoustic or thermal insulation of passenger compartments
Landscapes
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Description
〔産業上の利用分野〕
本発明は自動車の騒音防止のための吸遮音板に
関し、更に詳細には単一構造の成形物であるにも
拘らず、吸音板としての性能と遮音板としての性
能を兼備する吸遮音板を自動車の内装部品として
用いることにより、車室内騒音の吸音効果と車室
外からの騒音の遮音効果との相乗効果により極め
て優れた自動車の騒音防止効果を可能ならしめた
自動車用吸遮音板に関する。
〔従来の技術〕
従来よりトランクルームを透過して車室内に伝
播する騒音を防止し、且つ車室内騒音の吸音のた
め、後部座席の背面とリヤーウインドとの間でト
ランクルームの前方上部に当たる部位にパツケー
ジトレイとして、遮音機能を有する穴空きボード
と吸音機能を有するフエルト状物との組み合わせ
部品が用いられている。
〔発明が解決しようとする問題点〕
しかしながら、かかる方法では吸音及び遮音の
機能が十分ではなく、更に製造工程上においても
２部品の貼着工程を必要とし、その改善が強く望
まれていた。
〔問題点を解決するための手段〕
本発明者らはかかる実情に鑑み鋭意研究の結
果、特定条件で嵩高性不織布を成形し、吸音及び
遮音の両機能を有する単一構造の成形物を自動車
の内装部品として用いることにより、自動車の騒
音防止をなし得る吸遮音板を開発した。
〔作用〕
本発明を構成する嵩高性不織布に用いる繊維
は、羊毛をはじめとする動物性繊維、麻や綿をは
じめとする植物性繊維、ガラスウールやロツクウ
ールをはじめとする鉱物性繊維及びアクリル、ナ
イロン、テトロン、レーヨンをはじめとする合成
樹脂性繊維材料の１種もしくは２種以上を解繊混
合し、結合剤としては、フエノール樹脂等の熱硬
化性合成樹脂あるいはポリエチレン等の熱可塑性
樹脂の少なくとも１種を散布し繊維材料を結合せ
さ、嵩高に形成する。かかる熱硬化性合成樹脂は
加熱成形前において未硬化の状態となしておくこ
とは好ましいことである。上記繊維材料として
は、落綿、反毛、合成繊維クズなどの産業廃棄物
を用いることも経済的に好ましいことである。
嵩高性不織布は一般的には厚さが８〜50m／ｍ
であり、面密度が400〜4000ｇ／m2の範囲にある
ことが好ましい。面密度が400ｇ／m2未満の場合
遮音効果が十分でなく、且つ強度面で劣る不具合
が生じ、4000ｇ／m2を超える場合車両軽量化の上
で好ましくない。
本発明において用い得る吸遮音材はホツトプレ
ス型を用いての加熱加圧成形により得ることがで
き、そのかさ密度を0.05〜0.5ｇ／cm3として設け
ることを必須とするものである。好ましくは0.1
〜0.5ｇ／cm3であり、より好ましくは0.22〜0.45
ｇ／cm3である。かさ密度は、空気流れ抵抗、即ち
吸音特性及び遮音特性を支配する重要な因子の１
つであつて、かさ密度が0.05ｇ／cm3未満の場合遮
音効果が全く認められず、0.5ｇ／cm3を超える場
合吸音効果が失われる。
また空気流れ抵抗は、100〜1000dyne・sec／
cm3として設けることを必須とするものであり、
100dyne・sec／cm3未満の場合遮音効果が期待で
きず、1000dyne・sec／cm3を超える場合吸音材料
としての特性を失い好ましくない。
本発明の特定物性を満足する限り、表皮材を一
体成形しても差し支えない。また補強のために吸
遮音板の全面積の30％の範囲で0.5〜１ｇ／cm3程
度の高密度に成形した部分を設けても良い。
〔実施例〕
実施例 １
反毛30重量部、落綿50重量部を開繊混合し、融
点180℃で反応温度215℃のフエノール樹脂粉末20
重量部を散布混合し、フリース形成機でフリース
となした後180℃の加熱炉を通して厚さ40m／ｍ、
面密度1540ｇ／m2の嵩高性不織布を得た。
得られた嵩高性不織布を温度220℃の金型を用
いて加圧力５Kg／cm2で加熱加圧成形し、厚みが約
5.1m／ｍの吸遮音板を得た。このもののかさ密
度は0.30ｇ／cm3、空気流れ抵抗は250dyne・sec／
cm3であつた。
実施例 ２
実施例１で得られた嵩高性不織布を温度220℃
の金型を用いて加圧力５Kg／cm2で加熱加圧成形
し、厚みが約12m／ｍの吸遮音板を得た。このも
ののかさ密度は0.060ｇ／cm3、空気流れ抵抗は
120dyne・sec／cm3であつた。
実施例 ３
実施例１で得られた嵩高性不織布を温度220℃
の金型を用いて加圧力５Kg／cm2で加熱加圧成形
し、厚みが約3.9m／ｍの吸遮音板を得た。この
もののかさ密度は0.500ｇ／cm3、空気流れ抵抗は
800dyne・sec／cm3であつた。
比較例 １
実施例１で得られた嵩高性不織布を温度210℃
の金型を用いて加圧力５Kg／cm3で加熱加圧成形
し、厚みが約34m／ｍの防音板を得た。このもの
のかさ密度は0.045ｇ／cm3、空気流れ抵抗は
49.6dyne・sec／cm3であつた。
比較例 ２
実施例１で得られた嵩高性不織布を温度225℃
の金型を用いて加圧力５Kg／cm2で加熱加圧成形
し、厚みが約2.5m／ｍの防音板を得た。このも
ののかさ密度は0.600ｇ／cm3、空気流れ抵抗は
1120dyne・sec／cm3であつた。
実施例１〜３及び比較例１〜２で得られた吸遮
音板及び防音板の吸音率及び透過損失を測定し
た。
[Industrial Application Field] The present invention relates to a sound absorbing and insulating board for preventing noise in automobiles, and more specifically, although it is a molded product of a single structure, it has excellent performance as a sound absorbing board and a sound insulating board. By using a sound absorbing and insulating board as an interior part of an automobile, a sound absorbing and insulating board having both of Regarding sound absorbing and insulating boards for use. [Prior technology] Conventionally, in order to prevent noise from passing through the trunk and propagate into the passenger compartment, and to absorb noise inside the passenger compartment, a vehicle cage has been installed at the front upper part of the trunk between the back of the rear seat and the rear window. The tray is a combination of a perforated board with a sound-insulating function and a felt-like material with a sound-absorbing function. [Problems to be Solved by the Invention] However, this method does not have sufficient sound absorbing and sound insulating functions, and furthermore, requires a step of attaching two parts in the manufacturing process, and there has been a strong desire for improvement. [Means for solving the problem] In view of the above-mentioned circumstances, the present inventors conducted extensive research and found that by molding a bulky nonwoven fabric under specific conditions, a molded product with a single structure that has both sound absorption and sound insulation functions can be used for automobiles. We have developed a sound absorbing and insulating board that can be used as an interior component for automobiles to prevent noise. [Function] The fibers used for the bulky nonwoven fabric constituting the present invention include animal fibers such as wool, vegetable fibers such as hemp and cotton, mineral fibers such as glass wool and rock wool, and acrylic fibers. One or more types of synthetic resin fiber materials such as nylon, Tetron, and rayon are defibrated and mixed, and the binder is at least one of thermosetting synthetic resins such as phenolic resins or thermoplastic resins such as polyethylene. One type is dispersed to bind the fiber materials and form a bulky product. It is preferable that such thermosetting synthetic resin be in an uncured state before thermoforming. It is also economically preferable to use industrial waste such as fallen cotton, waste wool, and synthetic fiber waste as the fiber material. Bulky nonwoven fabrics generally have a thickness of 8 to 50 m/m.
It is preferable that the areal density is in the range of 400 to 4000 g/m 2 . If the areal density is less than 400 g/m 2 , the sound insulation effect will not be sufficient and the strength will be poor, and if it exceeds 4000 g/m 2 , it is not preferable for reducing the weight of the vehicle. The sound absorbing and insulating material that can be used in the present invention can be obtained by hot press molding using a hot press mold, and it is essential that the material has a bulk density of 0.05 to 0.5 g/cm 3 . Preferably 0.1
~0.5g/ cm3 , more preferably 0.22~0.45
g/ cm3 . Bulk density is one of the important factors governing air flow resistance, that is, sound absorption and insulation properties.
If the bulk density is less than 0.05 g/cm 3 , no sound insulation effect is observed, and if it exceeds 0.5 g/cm 3 , the sound absorption effect is lost. Also, the air flow resistance is 100 to 1000dyne・sec/
cm 3 ,
If it is less than 100 dyne·sec/cm 3 , no sound insulation effect can be expected, and if it exceeds 1000 dyne·sec/cm 3 , it will lose its properties as a sound absorbing material, which is undesirable. As long as the specific physical properties of the present invention are satisfied, the skin material may be integrally molded. Further, for reinforcement, a part formed with a high density of about 0.5 to 1 g/cm 3 may be provided in a range of 30% of the total area of the sound absorbing and insulating board. [Example] Example 1 30 parts by weight of recycled wool and 50 parts by weight of fallen cotton were opened and mixed, and phenol resin powder 20 with a melting point of 180°C and a reaction temperature of 215°C was prepared.
The weight parts are sprinkled and mixed, made into fleece using a fleece forming machine, and passed through a heating furnace at 180°C to a thickness of 40 m/m.
A bulky nonwoven fabric with an areal density of 1540 g/m 2 was obtained. The obtained bulky nonwoven fabric was heated and pressure molded using a mold at a temperature of 220°C at a pressure of 5 kg/cm 2 to a thickness of approx.
A sound absorbing and insulating board of 5.1 m/m was obtained. The bulk density of this product is 0.30g/cm 3 and the air flow resistance is 250dyne・sec/
It was warm at cm3 . Example 2 The bulky nonwoven fabric obtained in Example 1 was heated to 220°C.
A sound absorbing and insulating board with a thickness of approximately 12 m/m was obtained by heat-pressing molding using a mold with a pressure of 5 kg/cm 2 . The bulk density of this material is 0.060g/cm 3 , and the air flow resistance is
It was 120dyne・sec/ cm3 . Example 3 The bulky nonwoven fabric obtained in Example 1 was heated to 220°C.
A sound absorbing and insulating board with a thickness of approximately 3.9 m/m was obtained by heat-pressing molding using a mold with a pressure of 5 kg/cm 2 . The bulk density of this material is 0.500g/cm 3 , and the air flow resistance is
It was 800dyne・sec/ cm3 . Comparative Example 1 The bulky nonwoven fabric obtained in Example 1 was heated to 210°C.
A soundproof board with a thickness of about 34 m/m was obtained by heat-pressing molding using a mold with a pressure of 5 kg/cm 3 . The bulk density of this material is 0.045g/cm 3 , and the air flow resistance is
It was 49.6dyne・sec/ cm3 . Comparative Example 2 The bulky nonwoven fabric obtained in Example 1 was heated to 225°C.
A soundproof board with a thickness of about 2.5 m/m was obtained by heat-pressing molding using a mold with a pressure of 5 kg/cm 2 . The bulk density of this material is 0.600g/cm 3 , and the air flow resistance is
It was 1120dyne・sec/ cm3 . The sound absorption coefficient and transmission loss of the sound absorbing and insulating boards and sound insulating boards obtained in Examples 1 to 3 and Comparative Examples 1 to 2 were measured.
【表】
て測定。
〔発明の効果〕
実施例及び比較例で得られた吸遮音板及び防音
板の吸音率及び透過損失の測定結果では、本発明
の物性を満たす吸遮音材のみが吸音効果及び遮音
効果ともにすぐれた性能を有していることが明ら
かになつた。[Table] Measured.
[Effects of the Invention] According to the measurement results of the sound absorption coefficient and transmission loss of the sound absorbing and insulating boards and the sound insulating boards obtained in the Examples and Comparative Examples, only the sound absorbing and insulating material satisfying the physical properties of the present invention had excellent sound absorption and sound insulating effects. It has become clear that the product has excellent performance.
Claims (1)
トアンダーカバー、リヤーパーセル及びドアトリ
ムのうち、少なくとも１箇所に装着してなる吸遮
音板において、未硬化状態の熱硬化性合成樹脂あ
るいは熱可塑性合成樹脂の少なくとも一種と不連
続繊維材料とを主成分としてなる嵩高性不織布を
加熱加圧成形し、かさ密度を0.05〜0.5ｇ／cm3、
空気流れ抵抗を100〜1000dyne・sec／cm3として
設けてなることを特徴とする自動車用吸遮音板。1. A sound absorbing and insulating plate attached to at least one of the package tray, instrument undercover, rear parcel, and door trim of an automobile shall be made of at least one type of uncured thermosetting synthetic resin or thermoplastic synthetic resin. A bulky nonwoven fabric mainly composed of continuous fiber material is heated and pressure molded to have a bulk density of 0.05 to 0.5 g/cm 3 .
A sound absorbing and insulating board for automobiles characterized by having an air flow resistance of 100 to 1000 dyne·sec/cm 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55115969A JPS5741229A (en) | 1980-08-25 | 1980-08-25 | Preventing method for noise of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55115969A JPS5741229A (en) | 1980-08-25 | 1980-08-25 | Preventing method for noise of automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5741229A JPS5741229A (en) | 1982-03-08 |
| JPS6345982B2 true JPS6345982B2 (en) | 1988-09-13 |
Family
ID=14675612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55115969A Granted JPS5741229A (en) | 1980-08-25 | 1980-08-25 | Preventing method for noise of automobile |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5741229A (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121775U (en) * | 1984-01-28 | 1985-08-16 | 株式会社 明和 | Processed food made from salmon and cheese |
| JPS60121776U (en) * | 1984-01-28 | 1985-08-16 | 株式会社 明和 | Processed food made from salmon and cheese |
| JPS63315344A (en) * | 1987-06-17 | 1988-12-23 | Kasai Kogyo Co Ltd | Insulator for car |
| JPH049898A (en) * | 1990-04-27 | 1992-01-14 | Nippon Tokushu Toryo Co Ltd | Sound insulator |
| US5164254A (en) * | 1991-01-15 | 1992-11-17 | Chicopee | Hoodliner |
| JP4641654B2 (en) * | 2001-05-08 | 2011-03-02 | 三菱電機株式会社 | DC vacuum circuit breaker |
| CA2512596A1 (en) * | 2003-01-07 | 2004-07-29 | Michael T. Campbell | Molded lightweight foam acoustical barrier and its method of application |
| DE202004009726U1 (en) * | 2004-06-21 | 2005-11-10 | Carcoustics Tech Center Gmbh | Sound-absorbing, self-supporting end wall paneling for motor vehicles |
| CA3053172C (en) * | 2017-04-03 | 2021-03-30 | Cascade Engineering, Inc. | Acoustic fiber silencer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55115825U (en) * | 1979-10-05 | 1980-08-15 |
-
1980
- 1980-08-25 JP JP55115969A patent/JPS5741229A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5741229A (en) | 1982-03-08 |
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