JPH09174724A - Soundproof cover - Google Patents
Soundproof coverInfo
- Publication number
- JPH09174724A JPH09174724A JP7339544A JP33954495A JPH09174724A JP H09174724 A JPH09174724 A JP H09174724A JP 7339544 A JP7339544 A JP 7339544A JP 33954495 A JP33954495 A JP 33954495A JP H09174724 A JPH09174724 A JP H09174724A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- soundproof cover
- layer
- fiber assembly
- short fibers
- 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.)
- Pending
Links
- 239000000835 fiber Substances 0.000 claims abstract description 79
- 238000002844 melting Methods 0.000 claims description 26
- 230000008018 melting Effects 0.000 claims description 17
- 239000011230 binding agent Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 8
- 239000004745 nonwoven fabric Substances 0.000 abstract description 7
- 229920000728 polyester Polymers 0.000 abstract description 7
- -1 polypropylene Polymers 0.000 abstract description 4
- 239000004743 Polypropylene Substances 0.000 abstract description 3
- 239000002657 fibrous material Substances 0.000 abstract description 3
- 238000010030 laminating Methods 0.000 abstract description 3
- 229920001155 polypropylene Polymers 0.000 abstract description 3
- 244000025254 Cannabis sativa Species 0.000 abstract description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 abstract description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 abstract description 2
- 229920000742 Cotton Polymers 0.000 abstract description 2
- 239000004677 Nylon Substances 0.000 abstract description 2
- 239000004793 Polystyrene Substances 0.000 abstract description 2
- 229920002978 Vinylon Polymers 0.000 abstract description 2
- 235000009120 camo Nutrition 0.000 abstract description 2
- 235000005607 chanvre indien Nutrition 0.000 abstract description 2
- 239000011487 hemp Substances 0.000 abstract description 2
- 229920001778 nylon Polymers 0.000 abstract description 2
- 229920002223 polystyrene Polymers 0.000 abstract description 2
- 229920002994 synthetic fiber Polymers 0.000 abstract description 2
- 239000012209 synthetic fiber Substances 0.000 abstract description 2
- 210000002268 wool Anatomy 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 27
- 238000000465 moulding Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 239000011358 absorbing material Substances 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Landscapes
- Laminated Bodies (AREA)
- Motor Or Generator Frames (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する分野】本発明は、モーターなどの騒音を
低減する防音カバー、特に掃除機のモーター用の防音カ
バーに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof cover for reducing noise of a motor or the like, and more particularly to a soundproof cover for a motor of a vacuum cleaner.
【０００２】[0002]
【従来の技術】従来のモーターなどの防音用カバーは、
フェルトやウレタンフォーム等の吸音材料をモーターや
電動機等の形状に合わせて切断し、接着剤等を用いて張
り合せて立体的に形成し、騒音発生部の外側を覆うとい
うものが一般的であった。これらの防音カバーは、立体
的に成形するには手間がかかり過ぎるし、性能的にも、
従来品は吸音材の隙間や、密度の不均質等の影響で音が
漏れる等という問題もあった。これらの問題点を改良し
て、短繊維の繊維集合体を加熱溶融一体成形した防音カ
バーが特願平７−２００９４号に提案されていた。2. Description of the Related Art Soundproof covers such as conventional motors are
It is common to cut sound-absorbing materials such as felt and urethane foam according to the shapes of motors and electric motors, and bond them with adhesive to form a three-dimensional structure that covers the outside of the noise-generating part. It was These soundproof covers take too much time to form three-dimensionally, and in terms of performance,
The conventional product also has a problem that sound leaks due to the influence of the gap of the sound absorbing material or the non-uniformity of the density. In order to solve these problems, a soundproof cover in which a fiber assembly of short fibers is integrally molded by heating and melting has been proposed in Japanese Patent Application No. 7-20094.
【０００３】[0003]
【発明が解決しようとする課題】上記の短繊維の繊維集
合体を加熱溶融一体成形した防音カバーは、立体的な成
形性に優れ、外観的にきれいに見栄え良く仕上げること
が可能であるが、性能的には、防音性能のレベルがまだ
不十分であるという問題点があった。本発明は、このよ
うな従来の技術に鑑みてなされたものであり、高性能の
防音性能を有する防音カバーを提供するものである。The soundproof cover obtained by heat-melting and integrally molding the above fiber aggregate of short fibers is excellent in three-dimensional moldability and can be finished in a beautiful appearance and a good appearance. As a result, there is a problem that the level of soundproofing performance is still insufficient. The present invention has been made in view of such conventional techniques, and provides a soundproof cover having high-performance soundproofing performance.
【０００４】[0004]
【課題を解決するための手段】本発明では、短繊維を集
合体に成形した繊維集合体を２層以上積層することによ
り、上記のような問題点を解決を図った。SUMMARY OF THE INVENTION In the present invention, the above problems are solved by stacking two or more layers of a fiber aggregate formed by forming short fibers into an aggregate.
【０００５】[0005]
【発明の実施の形態】本発明に用いられる繊維集合体の
少なくとも１層は、加熱溶融一体成形されていることが
好ましい。この加熱溶融一体成形される繊維集合体に用
いられる繊維集合体は、低融点の短繊維の結合剤を少な
くとも５重量％以上、好ましくは１０重量％以上含む素
材から成ることが好ましい。本発明に使用される繊維集
合体の少なくとも１層を繊維径分布の中心が３０デニ−
ル以下の短繊維を用いて、平均見掛け密度を０．０３〜
０．３０ｇ／ｃｍ3とし、他の層を繊維径分布の中心が
１０デニ−ル以下の短繊維を用いて、平均見掛け密度を
０．０３〜０．１０ｇ／ｃｍ3 とすることが好ましい。
更に好ましい範囲は、繊維集合体の少なくとも１層を繊
維径分布の中心が１０デニ−ル以下の短繊維を用いて、
平均見掛け密度を０．０５〜０．１５ｇ／ｃｍ3 とし、
他の層を繊維径分布の中心が６デニ−ル以下の短繊維を
用いて、平均見掛け密度を０．０３〜０．０７ｇ／ｃｍ
3 とする範囲である。前記繊維集合体の少なくとも１層
は、加熱圧縮成形することが好ましい。加熱圧縮成形す
る場合には形状保持性とトリミングのし易さが要求され
る。太い繊維の方が剛性が高く形状保持性が良いが、太
い繊維だけだと防音性能が悪くなるので細い繊維も入れ
ることが好ましい。また、密度もトリミングする周辺部
や、穴あけ部分は密度の高い方が加工し易い。角部など
は密度の高い方が形状保持性が良い。よって、上記の範
囲が好適である。前記繊維集合体の他の層については、
防音性能を更に向上させる目的のものである。特にモー
ターの防音の場合、高い周波数を下げる目的のものが一
般的である。よって、上記の範囲が好ましい。本発明に
使用される２層以上の繊維集合体は、２層以上をモータ
ー等の形状に合わせて、同時に加熱圧縮成形しても良い
し、外側の少なくとも１層を加熱圧縮成形し、内側のそ
の他の層として、非成形の不織布などをモーター等に巻
きつけて用いても良い。BEST MODE FOR CARRYING OUT THE INVENTION It is preferable that at least one layer of the fiber assembly used in the present invention is integrally formed by heating and melting. It is preferable that the fiber assembly used for the heat-melt-integrated fiber assembly is made of a material containing at least 5% by weight, preferably 10% by weight or more, of a binder of low melting point short fibers. At least one layer of the fiber assembly used in the present invention has a fiber diameter distribution center of 30 deniers.
The average apparent density is 0.03 to
And 0.30 g / cm 3, another layer fiber diameter center of the fabric is 10 denier - using the Le following short fibers, the average apparent density is preferably set to 0.03~0.10g / cm 3.
A more preferable range is that at least one layer of the fiber assembly is formed of short fibers having a fiber diameter distribution center of 10 denier or less,
The average apparent density is 0.05 to 0.15 g / cm 3 ,
The other layers are made of short fibers whose center of fiber diameter distribution is 6 denier or less, and have an average apparent density of 0.03 to 0.07 g / cm.
The range is 3 . At least one layer of the fiber assembly is preferably heat compression molded. In the case of heat compression molding, shape retention and easy trimming are required. Thicker fibers have higher rigidity and better shape-retaining property, but since thick fibers only deteriorate the soundproofing performance, it is preferable to use thin fibers. Further, the higher the density of the peripheral portion where the density is trimmed and the holed portion, the easier the processing. The higher the density of corners, the better the shape retention. Therefore, the above range is preferable. For the other layers of the fiber assembly,
The purpose is to further improve the soundproofing performance. In particular, in the case of soundproofing a motor, it is common to reduce the high frequency. Therefore, the above range is preferable. The fiber assembly of two or more layers used in the present invention may be formed by heating and compression molding two or more layers at the same time in accordance with the shape of a motor or the like, or at least one layer on the outer side may be heat and compression molded and the inner layer may be formed. As the other layer, a non-molded non-woven fabric may be wound around a motor or the like.
【０００６】本発明による繊維集合体の素材としての短
繊維材料は、例えばポリエステル、ポリプロピレン、ポ
リスチレン、ナイロン、ビニロン等の合成繊維の他に、
羊毛、綿、麻等の天然繊維を使用することもできる。更
に、これらの繊維を使用した布から開繊した短繊維を使
用することもできる。The short fiber material as the material of the fiber assembly according to the present invention includes, for example, synthetic fibers such as polyester, polypropylene, polystyrene, nylon and vinylon,
Natural fibers such as wool, cotton and hemp can also be used. Furthermore, it is also possible to use short fibers opened from a cloth using these fibers.
【０００７】本発明の繊維集合体は、種々の成形法で得
ることができる。ひとつは、開繊してバラバラになった
短繊維を気体（空気）と共にモ−ルド内に吹き込み、多
数の細孔よりこの空気のみを排出し、短繊維のみをモ−
ルド内に充填して成形する方法である。このような空気
搬送式の充填法により、所望の立体的な形状に合致した
モ−ルドに沿った形状の充填が可能となり、全体に均質
な多孔質を得ることができる。または、カーディング及
びニードルパンチした非成形の不織布をそのまま短繊維
の繊維集合体として用いてもよい。更には、低融点の短
繊維の結合材を含む短繊維集合体をシート状にし、モー
ルド内に装填して熱成形してもよい。The fiber assembly of the present invention can be obtained by various molding methods. First, the short fibers that have been opened and broken apart are blown into the mold together with the gas (air), and only this air is discharged from many pores, and only the short fibers are molded.
It is a method of filling the inside of the mold and molding. With such an air-conveying filling method, it is possible to fill a shape along a mold that matches a desired three-dimensional shape, and to obtain a homogeneous porous material as a whole. Alternatively, a carded and needle punched non-molded non-woven fabric may be used as it is as a fiber assembly of short fibers. Further, a short fiber aggregate containing a binder of low melting point short fibers may be formed into a sheet, which is loaded into a mold and thermoformed.
【０００８】本発明の繊維集合体に用いられる結合材と
しては、加熱により溶融しかつ反応固化するフェノ−ル
樹脂、あるいは蒸気吹き込みにより反応固化するウレタ
ン系接着剤、あるいは又基材となる短繊維より低い温度
で溶融する熱可塑性樹脂等種々のものがある。しかし、
粉状では吹き込み充填の場合、充填時に粉状結合材の偏
りが生じ、分散不良を起こしたり、空気抜き孔に結合材
が詰まって充填不良や密度不良を起こしたり、あるいは
結合材のみ飛散してしまうことがあり、好ましくない。
また、結合材が液状の場合には混合時に繊維の固まりが
できて良好な吹き込み充填を得ることができないことが
ある。これに対し、繊維状の結合材を使用する場合は開
繊機等を用いて混合することにより良好な分散が得ら
れ、しかも繊維集合体の素材である短繊維を充填するの
に、何らの支障も生じない。このような繊維状の結合材
としては、加熱あるいは蒸気によって溶融する低融点の
ポリエステル樹脂、あるいはポリエチレンやポリプロピ
レン等の基材となる短繊維より低い融点をもつ繊維を使
用することができる。望ましくは繊維素材が低融点成分
と高融点成分から構成され、低融点成分が高融点成分の
外側、つまり繊維表面となるように配置してなる複合繊
維、所謂芯鞘型の繊維が耐久性及び防音性能の面から好
適である。この複合繊維を低融点成分の融点より高くか
つ高融点成分の融点より低い温度で加熱成形すれば、結
合材繊維も完全な繊維状態のまま低融点成分の溶融によ
り結合し、高い耐久性と防音性を確保することができ
る。The binder used in the fiber assembly of the present invention is a phenol resin which is melted and solidified by heating, a urethane adhesive which is solidified by steam blowing, or a short fiber as a base material. There are various types such as thermoplastic resins that melt at lower temperatures. But,
In the case of powder filling, in the case of blow filling, uneven distribution of the powder binder occurs at the time of filling, resulting in poor dispersion, or when the air vent holes are clogged with binder, resulting in poor filling or poor density, or only the binder scatters. Sometimes it is not preferable.
In addition, when the binder is liquid, the fibers may be aggregated during mixing, and good blow filling may not be obtained. On the other hand, when using a fibrous binder, good dispersion can be obtained by mixing with a fiber-spreading machine, etc., and there is no hindrance to filling the short fibers that are the material of the fiber assembly. Does not occur. As such a fibrous binder, a polyester resin having a low melting point that is melted by heating or steam, or a fiber having a melting point lower than that of a short fiber serving as a base material such as polyethylene or polypropylene can be used. Desirably, the fiber material is composed of a low-melting point component and a high-melting point component, the low-melting point component is outside the high-melting point component, that is, a composite fiber arranged so as to be the fiber surface, a so-called core-sheath type fiber is durable and It is preferable in terms of soundproofing performance. If this composite fiber is heat-formed at a temperature higher than the melting point of the low-melting point component and lower than the melting point of the high-melting point component, the binder fiber will be bonded by melting the low-melting point component in a perfect fiber state, resulting in high durability and sound insulation It is possible to secure the sex.
【０００９】以下に本発明を図面を参照して実施例につ
いて具体的に説明する。Embodiments of the present invention will be specifically described below with reference to the drawings.
【実施例１】図１を参照して、本発明による防音カバー
の製造方法を、具体的に説明する。まず、防音カバーの
形状に合致したモ−ルド（成形型）を製作し、図１の様
に配置した。次に、モールド（上型）１とモールド（下
型）３との間に、６デニ−ル長さ５１ｍ／ｍのポリエス
テル短繊維を４０％と、３デニ−ル長さ５１ｍ／ｍのポ
リエステル短繊維を４０％と、４デニ−ル長さ５１ｍ／
ｍで断面が二重構造の低融点ポリエステル繊維（外側融
点９５℃、内（芯）側融点２３５℃）とを２０％の比率
で混合し、均一分散させ、更に、カーディングニードル
パンチした目付７００ｇ／ｍ2 の不織布２を装填した。
次に、モールド（上型）１を製品厚さ７ｍｍになる位置
まで降下させ、下方の送風口４より１３０℃〜１５０℃
の熱風を１分間送り込み、更に１分間室温の冷風を送り
込み成形し、平均見掛け密度０．１ｇ／ｃｍ3 の成形体
を得た。これを外側の第１層とした。内側の第２層とし
て、第１層と同様の材料で、目付５００ｇ／ｍ2 、厚さ
７ｍｍ、平均見掛け密度０．０７ｇ／ｃｍ3 の非成形不
織布を用い、第１層の内側に巻つけてモーター５に取り
付けた。図２は、実施例１の防音カバーをモーター５に
取り付けた時の断面図である。図２の防音カバーは、電
気掃除機のモーター用の防音カバーで、モーターに合わ
せて成形されている防音カバーの第１層６と、非成形の
不織布からなる第２層７とで構成されている。防音カバ
ーの第１層の底面８に穴を開けている。この防音カバー
の防音性能をＪＩＳ Ｃ９１０８により測定した。上方
向１ｍの位置で測定した周波数と音圧レベルを図３に、
同様に横方向１ｍの位置で測定した周波数と音圧レベル
を図４に示す。音圧レベルのオーバーオール値を表１に
示した。EXAMPLE 1 A method for manufacturing a soundproof cover according to the present invention will be specifically described with reference to FIG. First, a mold (molding die) conforming to the shape of the soundproof cover was manufactured and arranged as shown in FIG. Next, between the mold (upper mold) 1 and the mold (lower mold) 3, 40% of polyester short fibers having a length of 6 m / 51 m / m and polyester having a length of 3 m / 51 m / m were used. 40% short fiber and 4 denier length 51m /
A low-melting point polyester fiber having a double cross section at m (melting point outside 95 ° C., melting point inside (core) side 235 ° C.) was mixed at a ratio of 20%, uniformly dispersed, and further carding needle punched to give a fabric weight of 700 g. / M 2 of nonwoven fabric 2 was loaded.
Next, the mold (upper mold) 1 is lowered to a position where the product thickness is 7 mm, and 130 ° C to 150 ° C is blown from the blower port 4 below.
Was blown for 1 minute and then cold air was blown for 1 minute at room temperature to perform molding to obtain a molded body having an average apparent density of 0.1 g / cm 3 . This was the outer first layer. As the second inner layer, the same material as the first layer is used, and a non-molded non-woven fabric having a basis weight of 500 g / m 2 , a thickness of 7 mm, and an average apparent density of 0.07 g / cm 3 is used, and is wrapped around the first layer. Attached to the motor 5. FIG. 2 is a sectional view when the soundproof cover of the first embodiment is attached to the motor 5. The soundproof cover of FIG. 2 is a soundproof cover for a motor of an electric vacuum cleaner, and is composed of a first layer 6 of the soundproof cover that is molded according to the motor and a second layer 7 that is made of non-molded nonwoven fabric. There is. The bottom surface 8 of the first layer of the soundproof cover is perforated. The soundproof performance of this soundproof cover was measured according to JIS C9108. Figure 3 shows the frequency and sound pressure level measured at a position of 1 m upward.
Similarly, the frequency and sound pressure level measured at a position 1 m in the horizontal direction are shown in FIG. Table 1 shows the overall value of the sound pressure level.
【００１０】[0010]
【実施例２】防音カバーの繊維集合体の外側の第１層と
して、実施例１と同様のものを用い内側の第２層とし
て、３デニ−ル長さ５１ｍ／ｍのポリエステル短繊維を
８０％と、４デニ−ル長さ５１ｍ／ｍで断面が二重構造
の低融点ポリエステル繊維（外側融点９５℃、内（芯）
側融点２３５℃）を２０％で構成されたものを吹き込み
成形法で平均見掛け密度０．０６ｇ／ｃｍ3 、厚さ１０
ｍｍの平板として、実施例１と同様にモーターに取り付
けた。この防音カバーの防音性能をＪＩＳ Ｃ９１０８
により測定した。音圧レベルのオーバーオール値を表１
に示した。[Example 2] The same outer layer as that of Example 1 was used as the outer first layer of the fiber assembly of the soundproof cover, and 80 polyester short fibers having a denier of 51 m / m were used as the second inner layer. %, 4 denier length 51 m / m, low melting point polyester fiber having a double structure in cross section (outer melting point 95 ° C., inner (core)
A material having a side melting point of 235 ° C.) of 20% has an average apparent density of 0.06 g / cm 3 and a thickness of 10 by a blow molding method.
A mm flat plate was attached to the motor in the same manner as in Example 1. The soundproof performance of this soundproof cover is based on JIS C9108.
Was measured by Table 1 shows the overall value of sound pressure level
It was shown to.
【００１１】[0011]
【比較例】防音カバーとして、繊維集合体を単層で用い
たもの、即ち実施例１の繊維集合体の外側の第１層と同
様のものをモーターに合わせて作成して、実施例１と同
様にモーターに取り付けた。この防音カバーの防音性能
をＪＩＳ Ｃ９１０８により測定した。音圧レベルのオ
ーバーオール値を表１に示した。この結果、横方向、上
方向とも実施例の防音性能が優れていることが明らかと
なった。[Comparative Example] A soundproof cover using a single layer of the fiber assembly, that is, the same as the first outer layer of the fiber assembly of Example 1, was prepared according to the motor. Similarly, it was attached to the motor. The soundproof performance of this soundproof cover was measured according to JIS C9108. Table 1 shows the overall value of the sound pressure level. As a result, it was revealed that the soundproofing performance of the example was excellent in both the lateral direction and the upward direction.
【表１】 [Table 1]
【００１２】[0012]
【発明の効果】以上の説明から明らかなごとく、短繊維
を集合体に成形した繊維集合体を２層以上積層すること
により、防音性能に優れた防音カバーが得られた。As is apparent from the above description, a soundproof cover having excellent soundproofing performance can be obtained by laminating two or more layers of a fiber assembly obtained by molding short fibers into an assembly.
【図１】図１は本発明による防音カバーの成型装置の摸
式的断面図である。FIG. 1 is a schematic cross-sectional view of a soundproof cover molding apparatus according to the present invention.
【図２】図２は本発明の実施例１に係わる防音カバーの
断面図の概略を示す。FIG. 2 is a schematic sectional view of a soundproof cover according to the first embodiment of the present invention.
【図３】図３は本発明の実施例１に係わる防音カバーの
上方向１ｍの位置で測定した防音性能（周波数と音圧レ
ベル）を示す。FIG. 3 shows soundproof performance (frequency and sound pressure level) measured at a position 1 m above in the soundproof cover according to the first embodiment of the present invention.
【図４】図４は本発明の実施例１に係わる防音カバーの
横方向１ｍの位置で測定した防音性能（周波数と音圧レ
ベル）を示す。FIG. 4 shows soundproof performance (frequency and sound pressure level) measured at a position 1 m in the lateral direction of the soundproof cover according to the first embodiment of the present invention.
１：モ−ルド（上型） ２：不織布 ３：モ−ルド（下型） ４：送風口 ５：モーター ６：防音カバーの外側の第１層 ７：防音カバーの内側の第２層 1: Mold (upper mold) 2: Nonwoven fabric 3: Mold (lower mold) 4: Air blower 5: Motor 6: First layer outside the soundproof cover 7: Second layer inside the soundproof cover
Claims (4)
２層以上積層したことを特徴とする防音カバー。1. A soundproof cover comprising a stack of two or more fiber aggregates formed by forming short fibers into an aggregate.
溶融一体成形されてなることを特徴とする請求項１記載
の防音カバー。2. The soundproof cover according to claim 1, wherein at least one layer of the fiber assembly is integrally formed by heating and melting.
径分布の中心が３０デニ−ル以下の短繊維で、平均見掛
け密度０．０３〜０．３０ｇ／ｃｍ3 の繊維集合体であ
って、前記繊維集合体の他の層が繊維径分布の中心が１
０デニ−ル以下の短繊維で、平均見掛け密度０．０３〜
０．１０ｇ／ｃｍ3 の繊維集合体であることを特徴とす
る請求項１、又は請求項２記載の防音カバー。3. A fiber assembly in which at least one layer of the fiber assembly is a short fiber having a fiber diameter distribution center of 30 denier or less and an average apparent density of 0.03 to 0.30 g / cm 3. , The other layer of the fiber assembly has a center of fiber diameter distribution of 1
Short fibers of 0 denier or less and an average apparent density of 0.03 to
The soundproof cover according to claim 1 or 2, which is a fiber aggregate of 0.10 g / cm 3 .
合体の短繊維には、低融点の短繊維から成る結合材を少
なくとも５重量％以上含むことを特徴とする請求項２記
載の防音カバー。4. The soundproof cover according to claim 2, wherein the short fibers of the fiber assembly integrally formed by heating and melting contain at least 5% by weight or more of a binder made of short fibers having a low melting point. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7339544A JPH09174724A (en) | 1995-12-26 | 1995-12-26 | Soundproof cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7339544A JPH09174724A (en) | 1995-12-26 | 1995-12-26 | Soundproof cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09174724A true JPH09174724A (en) | 1997-07-08 |
Family
ID=18328487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7339544A Pending JPH09174724A (en) | 1995-12-26 | 1995-12-26 | Soundproof cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09174724A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001205725A (en) * | 2000-01-26 | 2001-07-31 | Toyobo Co Ltd | Sound-absorbing nonwoven fabric laminate structure |
| CN110182146A (en) * | 2018-02-22 | 2019-08-30 | 本田技研工业株式会社 | Vehicle driving apparatus |
| CN115149710A (en) * | 2022-09-02 | 2022-10-04 | 福安市万里电机有限公司 | Noise reduction type motor that massage armchair was used |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05181486A (en) * | 1991-12-27 | 1993-07-23 | Nissan Motor Co Ltd | New acoustic absorbent |
| JPH06336144A (en) * | 1993-05-28 | 1994-12-06 | Nippon Tokushu Toryo Co Ltd | Integrally moldable soundproof material |
-
1995
- 1995-12-26 JP JP7339544A patent/JPH09174724A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05181486A (en) * | 1991-12-27 | 1993-07-23 | Nissan Motor Co Ltd | New acoustic absorbent |
| JPH06336144A (en) * | 1993-05-28 | 1994-12-06 | Nippon Tokushu Toryo Co Ltd | Integrally moldable soundproof material |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001205725A (en) * | 2000-01-26 | 2001-07-31 | Toyobo Co Ltd | Sound-absorbing nonwoven fabric laminate structure |
| CN110182146A (en) * | 2018-02-22 | 2019-08-30 | 本田技研工业株式会社 | Vehicle driving apparatus |
| US10680493B2 (en) * | 2018-02-22 | 2020-06-09 | Honda Motor Co., Ltd. | Vehicle drive device |
| CN110182146B (en) * | 2018-02-22 | 2022-09-23 | 本田技研工业株式会社 | Vehicle drive device |
| CN115149710A (en) * | 2022-09-02 | 2022-10-04 | 福安市万里电机有限公司 | Noise reduction type motor that massage armchair was used |
| CN115149710B (en) * | 2022-09-02 | 2022-11-08 | 福安市万里电机有限公司 | Noise reduction type motor for massage chair |
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