JP3244339B2 - Damping material - Google Patents

Damping material

Info

Publication number
JP3244339B2
JP3244339B2 JP11754393A JP11754393A JP3244339B2 JP 3244339 B2 JP3244339 B2 JP 3244339B2 JP 11754393 A JP11754393 A JP 11754393A JP 11754393 A JP11754393 A JP 11754393A JP 3244339 B2 JP3244339 B2 JP 3244339B2
Authority
JP
Japan
Prior art keywords
sheet
parts
weight
resin
sheet member
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 - Fee Related
Application number
JP11754393A
Other languages
Japanese (ja)
Other versions
JPH06295182A (en
Inventor
宏司 岡田
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.)
Aisin Takaoka Co Ltd
Original Assignee
Aisin Takaoka 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 Aisin Takaoka Co Ltd filed Critical Aisin Takaoka Co Ltd
Priority to JP11754393A priority Critical patent/JP3244339B2/en
Publication of JPH06295182A publication Critical patent/JPH06295182A/en
Application granted granted Critical
Publication of JP3244339B2 publication Critical patent/JP3244339B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Laminated Bodies (AREA)

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、制振材の改良に関する
ものであり、詳しくは、音響共振を防止可能な制振材に
関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a vibration damping material, and more particularly, to a vibration damping material capable of preventing acoustic resonance.

【0002】[0002]

【従来の技術】音響機器用筐材として、樹脂板、繊維強
化樹脂板、金属板が用いられ、さらに他の材料として、
ポリエチレン、ポリプロピレン等の合成樹脂と黒鉛粉末
とを混練してなる音響材料(例えば、特公昭58−56
316号公報)、熱硬化性樹脂やゴムをバインダーとし
たセラミック成形体(例えば、特開昭55−79597
号公報)および繊維状金属片を堆積させた後圧縮して繊
維状金属片を互いに結合させてなる音響材料(例えば、
特開昭57−79796号公報)などがある。
2. Description of the Related Art A resin plate, a fiber reinforced resin plate, and a metal plate are used as a housing material for audio equipment.
An acoustic material obtained by kneading a synthetic resin such as polyethylene or polypropylene and graphite powder (for example, Japanese Patent Publication No. 58-56)
No. 316), a ceramic molded article using a thermosetting resin or rubber as a binder (for example, Japanese Patent Application Laid-Open No. 55-79597).
Publication) and an acoustic material formed by depositing and compressing fibrous metal pieces and bonding the fibrous metal pieces together (for example,
JP-A-57-79796).

【0003】[0003]

【発明が解決しようとする課題】樹脂板や繊維強化樹脂
板は、成形加工性、軽量化の点では優れているが、軽量
であるために共振しやすく、外部からの振動にも影響さ
れやすいという問題点がある。アルミニウムなどの金属
板は、高域共振を十分に減衰できず、特定の周波数に対
して共振しやすいという問題点がある。合成樹脂と黒鉛
粉末とを混練してなる音響材料は、ヤング率、密度とも
小さく、共振を十分に防ぐことができず、バインダーを
用いたセラミック成形体は、素材が高価な上、成形加工
法が効率的でなく、コスト上問題があり、圧縮繊維状金
属片を堆積させた音響材料は、密度が小さいためスピー
カボックスのような用途では共振を十分に抑制できない
という問題点がある。そこで、本発明はかかる問題点を
解消するためになされたもので、音響共振が防止され、
音響特性が良好で、加工性の良い制振材を提供するもの
である。
The resin plate and the fiber reinforced resin plate are excellent in moldability and weight reduction, but they are easy to resonate due to their light weight and are easily affected by external vibrations. There is a problem. A metal plate such as aluminum cannot sufficiently attenuate high-frequency resonance, and has a problem that resonance easily occurs at a specific frequency. The acoustic material obtained by kneading a synthetic resin and graphite powder has a low Young's modulus and a small density, cannot sufficiently prevent resonance, and a ceramic molded body using a binder is expensive and requires a molding method. However, there is a problem in that the acoustic material on which the compressed fibrous metal pieces are deposited has a low density, so that resonance cannot be sufficiently suppressed in applications such as a speaker box. Therefore, the present invention has been made in order to solve such a problem, acoustic resonance is prevented,
It is intended to provide a vibration damping material having good acoustic characteristics and good workability.

【0004】[0004]

【課題を解決するための手段】本発明の制振材は、紙、
布、不織布、金属箔、樹脂シートのいずれか1種から形
成される第1シート部材と、有機バインダー100重量
部に対して金属粉末を25〜4000重量部混合してシ
ート状に形成した第2シート部材とを加圧成形して一体
結合した二層構造からなる防音シートを、1対の硬質繊
維板の間に介在させ加圧成形して一体結合した硬質繊維
板成形体の表面に、メラミン、アクリル、塩化ビニール
のいずれか1種を被覆したものである。
Means for Solving the Problems The vibration damping material of the present invention is made of paper,
A first sheet member formed of any one of cloth, nonwoven fabric, metal foil, and resin sheet, and a second sheet formed by mixing 25 to 4000 parts by weight of metal powder with respect to 100 parts by weight of an organic binder. A sound insulation sheet having a two-layer structure in which a sheet member and a sheet member are integrally formed by pressure molding is interposed between a pair of hard fiber plates, and melamine, acrylic, , Or vinyl chloride.

【0005】(1)第1シート部材 第1シート部材としては、厚紙、クラフト紙、布、不織
布、金属箔、樹脂シートのいずれか1種が用いられ、第
1シート部材の材質を適宜選択すれば、接着性、機械的
強度を向上できる。 (2)有機バインダー 有機バインダーとしては、エポキシ樹脂、ポリウレタン
樹脂、不飽和ポリエステル樹脂、ポリアクリルエステル
樹脂、アミノ樹脂、ユリア樹脂、フェノール樹脂、塩化
ビニール樹脂の1種又は2種以上が用いられる。 (3)金属粉末 金属粉末としては、アルミニウム、銅、黄銅、亜鉛、チ
タン、ステンレス、ニッケル、鋼、鋳鉄およびその合金
からなる金属粉末の1種又は2種以上が用いられ、好ま
しくは30メッシュ以下のものを有機バインダー100
重量部に対して25〜4000重量部添加し、25重量
部未満では音波の遮音効果が低下し、4000重量部を
越えると、硬質繊維板成形体のかさ比重が大きくなり、
可撓性も失われる。 (4)硬質繊維板 硬質繊維板としては、日本工業規格「硬質繊維板」A5
907に準拠したものが用いられる。 (5)被覆層 被覆層としては、メラミン、アクリル、塩化ビニールの
いずれか1種が用いられ、被覆層は音質向上を図ると共
に、外観を良好にし、特に易酸化性の鉄粉等を用いた場
合、酸化防止を図り、経時による外観不良を防止するこ
とができる。
(1) First sheet member As the first sheet member, any one of cardboard, kraft paper, cloth, nonwoven fabric, metal foil, and resin sheet is used, and the material of the first sheet member is appropriately selected. If this is the case, the adhesiveness and mechanical strength can be improved. (2) Organic binder As the organic binder, one or more of epoxy resin, polyurethane resin, unsaturated polyester resin, polyacrylester resin, amino resin, urea resin, phenol resin, and vinyl chloride resin are used. (3) Metal powder As the metal powder, one or more metal powders of aluminum, copper, brass, zinc, titanium, stainless steel, nickel, steel, cast iron and alloys thereof are used, and preferably 30 mesh or less. Organic binder 100
25 to 4000 parts by weight based on parts by weight, if less than 25 parts by weight, the sound insulating effect of sound wave is reduced.
Flexibility is also lost. (4) Hard fiber board As the hard fiber board, Japanese Industrial Standard "Hard fiber board" A5
907 is used. (5) Coating layer As the coating layer, any one of melamine, acrylic, and vinyl chloride is used. The coating layer improves sound quality, improves the appearance, and particularly uses easily oxidizable iron powder. In this case, it is possible to prevent oxidation and to prevent poor appearance over time.

【0006】[0006]

【作用】本発明の制振材は音響振動に対する制振性能を
保有しており、該制振材に伝幡した振動のエネルギーは
有機バインダーと金属粉末との相互の摩擦によって熱エ
ネルギーに変換されて減衰される。
The vibration damping material of the present invention has vibration damping performance against acoustic vibration, and the energy of the vibration transmitted to the vibration damping material is converted into thermal energy by mutual friction between the organic binder and the metal powder. Is attenuated.

【0007】[0007]

【実施例】本発明の実施例について説明する。クラフト
紙からなる第1シート部材と、ポリエステル樹脂100
重量部に対して鋳鉄粉末(30メッシュ以下)2600
重量部混合してシート状に形成して第2シート部材とを
加圧成形して二層構造を有する厚さ2.0mmの防音シ
ートを得た。しかる後、該防音シートを1対の200タ
イプ硬質繊維板の間に介在させ加圧成形して厚さ12.
0mmの硬質繊維板成形体を形成し、次いでその表面に
厚さ0.8mmのメラミン樹脂シートを貼着してメラミ
ン樹脂被覆層を形成した厚さ13.6mmの制振板を得
た。比較例1は厚さ13.6mmの硬質繊維板、比較例
2は厚さ13.6mmのアルミニウム板である。次に、
本実施例の制振材、比較例1の硬質繊維板および比較例
2のアルミニウム板の損失係数(η)を測定し、その結
果を表1に示す。本実施例は比較例1〜2と比べて損失
係数(η)が大きく、制振効果が良いことがわかる。
An embodiment of the present invention will be described. A first sheet member made of kraft paper and a polyester resin 100
2600 parts by weight of cast iron powder (30 mesh or less)
Parts by weight were mixed to form a sheet, and the second sheet member was pressure-formed to obtain a 2.0 mm thick soundproof sheet having a two-layer structure. Thereafter, the soundproof sheet is interposed between a pair of 200-type hard fiber plates and pressed and formed to a thickness of 12.
A hard fiber board molded article of 0 mm was formed, and then a melamine resin sheet of 0.8 mm thickness was adhered to the surface thereof to obtain a 13.6 mm thick vibration damping plate having a melamine resin coating layer formed thereon. Comparative Example 1 is a hard fiber board having a thickness of 13.6 mm, and Comparative Example 2 is an aluminum plate having a thickness of 13.6 mm. next,
The loss coefficient (η) of the vibration damping material of this example, the hard fiber board of Comparative Example 1, and the aluminum plate of Comparative Example 2 were measured, and the results are shown in Table 1. This example has a large loss coefficient (η) as compared with Comparative Examples 1 and 2, and it can be seen that the vibration damping effect is good.

【0008】[0008]

【表1】 [Table 1]

【0009】次に、側板が本発明の制振材、比較例1の
硬質繊維板および比較例2のアルミニウム板からなる音
響機器を作製し、視聴試験を行ったところ、側板が本発
明の制振材からなる音響機器は極めて良好な音響特性を
示すことが確認された。
[0009] Next, an audio apparatus was manufactured in which the side plate was made of the vibration damping material of the present invention, the hard fiber plate of Comparative Example 1 and the aluminum plate of Comparative Example 2, and a viewing test was performed. It was confirmed that the acoustic device made of the vibration material exhibited extremely good acoustic characteristics.

【0010】[0010]

【発明の効果】本発明によれば、紙、布、不織布、金属
箔、樹脂シートのいずれか1種から形成される第1シー
ト部材と、有機バインダー100重量部に対して金属粉
末を25〜4000重量部混合してシート状に形成した
第2シート部材とを加圧成形して一体結合した二層構造
からなる防音シートを、1対の硬質繊維板の間に介在さ
せ加圧成形して一体結合した硬質繊維板成形体の表面
に、メラミン、アクリル、塩化ビニールのいずれか1種
を被覆したので、制振効果、装飾性および加工性に優
れ、また音響特性も良好であり、しかも原料は安価であ
るので製造コストが低減できる。
According to the present invention, the first sheet member formed of any one of paper, cloth, nonwoven fabric, metal foil, and resin sheet, and the metal powder are added in an amount of 25 to 100 parts by weight of the organic binder. A soundproofing sheet having a two-layer structure in which 4000 parts by weight of a second sheet member mixed and formed into a sheet shape is pressure-formed and integrally bonded is interposed between a pair of hard fiber plates and pressure-formed to be integrally bonded. The surface of the molded hard fiberboard is coated with any one of melamine, acrylic and vinyl chloride, so it has excellent vibration damping effect, decorativeness and workability, good acoustic characteristics, and low cost of raw materials Therefore, the manufacturing cost can be reduced.

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 紙、布、不織布、金属箔、樹脂シートの
いずれか1種から形成される第1シート部材と、有機バ
インダー100重量部に対して金属粉末を25〜400
0重量部混合してシート状に形成した第2シート部材と
を加圧成形して一体結合した二層構造からなる防音シー
トを、1対の硬質繊維板の間に介在させ加圧成形して一
体結合した硬質繊維板成形体の表面に、メラミン、アク
リル、塩化ビニールのいずれか1種を被覆したことを特
徴とする制振材。
1. A first sheet member formed of any one of paper, cloth, nonwoven fabric, metal foil, and resin sheet, and metal powder in an amount of 25 to 400 with respect to 100 parts by weight of an organic binder.
A soundproof sheet having a two-layer structure in which 0 parts by weight of a second sheet member mixed and formed into a sheet shape is pressure-formed and integrally bonded is interposed between a pair of hard fiber plates and pressure-formed to be integrally bonded. A vibration damping material, characterized in that the surface of a molded hard fiberboard is coated with any one of melamine, acrylic and vinyl chloride.
【請求項2】 紙、布、不織布、金属箔、樹脂シートの
いずれか1種から形成される第1シート部材と、有機バ
インダー100重量部に対して金属粉末を25〜400
0重量部混合してシート状に形成した第2シート部材と
を加圧成形して一体結合した二層構造からなる防音シー
トを、1対の硬質繊維板の間に介在させ加圧成形して一
体結合したことを特徴とする制振材。
2. A first sheet member formed of any one of paper, cloth, nonwoven fabric, metal foil, and resin sheet, and metal powder in an amount of 25 to 400 parts per 100 parts by weight of an organic binder.
A soundproof sheet having a two-layer structure in which 0 parts by weight of a second sheet member mixed and formed into a sheet shape is pressure-formed and integrally bonded is interposed between a pair of hard fiber plates and pressure-formed to be integrally bonded. Damping material characterized by having done.
JP11754393A 1993-04-07 1993-04-07 Damping material Expired - Fee Related JP3244339B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11754393A JP3244339B2 (en) 1993-04-07 1993-04-07 Damping material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11754393A JP3244339B2 (en) 1993-04-07 1993-04-07 Damping material

Publications (2)

Publication Number Publication Date
JPH06295182A JPH06295182A (en) 1994-10-21
JP3244339B2 true JP3244339B2 (en) 2002-01-07

Family

ID=14714408

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11754393A Expired - Fee Related JP3244339B2 (en) 1993-04-07 1993-04-07 Damping material

Country Status (1)

Country Link
JP (1) JP3244339B2 (en)

Also Published As

Publication number Publication date
JPH06295182A (en) 1994-10-21

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