JP2008124589A - Speaker damper - Google Patents

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JP2008124589A
JP2008124589A JP2006303432A JP2006303432A JP2008124589A JP 2008124589 A JP2008124589 A JP 2008124589A JP 2006303432 A JP2006303432 A JP 2006303432A JP 2006303432 A JP2006303432 A JP 2006303432A JP 2008124589 A JP2008124589 A JP 2008124589A
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damper
dtex
polyketone
fibers
fiber
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Takashi Yanai
孝 谷内
Shinichi Okajima
真一 岡嶋
Kiyoshi Miyaji
清 宮地
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Asahi Kasei Corp
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Asahi Kasei Fibers Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a speaker damper which has small secular change in lowest resonance frequency and is superior in durability. <P>SOLUTION: The speaker damper includes, as a base, cloth containing fiber composed of polyketone in which ≥95 mol% of repeating units are expressed by formula (1). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明はスピーカー用ダンパーに関し、特に最低共振周波数の経時変化が少ない耐久性に優れたスピーカー用ダンパーに関する。   The present invention relates to a loudspeaker damper, and more particularly to a loudspeaker damper excellent in durability with little change in the minimum resonance frequency with time.

スピーカー用ダンパーは、音響出力機器のスピーカーにおける部品であって、音を放射状に発する振動板(スピーカー・コーン)に振動を伝達するコイルボビンと、スピーカーフレームに接着され、これらを弾性的に支持する機能を有し、同心円のコルゲーションを面状に広げた形態を有している。
特許文献1には、かかるスピーカー用ダンパーの基体として、アラミド繊維を用いたものが提案されており、綿布使いものに対比して、耐久性は大きく改善されているものの、さらなる改善が要求されている。
The damper for the speaker is a component in the speaker of the sound output device, and is a function that is elastically supported by a coil bobbin that transmits vibration to a diaphragm (speaker cone) that radiates sound and a speaker frame. It has the form which expanded corrugation of concentric circle in the shape of a field.
Patent Document 1 proposes a material using an aramid fiber as a base material for such a damper for a speaker. Although the durability is greatly improved as compared with that using cotton cloth, further improvement is required. .

特開2006−129037号公報JP 2006-129037 A

本発明は、かかる要求に応えたスピーカー用ダンパーを提供するものである。   The present invention provides a loudspeaker damper that meets such requirements.

本発明者らは、前記課題を解決するために鋭意検討した結果、本発明に到達したものである。
すなわち、本発明は下記の通りである。
(1)繰り返し単位の95モル%以上が、下記式(1)で示されるポリケトンで構成される繊維(以下、ポリケトン繊維という)を含有する布帛を基体(substrate)とすることを特徴とするスピーカー用ダンパー。

Figure 2008124589
The inventors of the present invention have reached the present invention as a result of intensive studies to solve the above problems.
That is, the present invention is as follows.
(1) A speaker in which a fabric containing 95% by mole or more of repeating units containing a fiber (hereinafter referred to as a polyketone fiber) composed of a polyketone represented by the following formula (1) is used as a substrate. Damper for use.
Figure 2008124589

本発明は、最低共振周波数の経時変化が少ない耐久性に優れたスピーカー用ダンパーを提供するものである。   The present invention provides a damper for a speaker excellent in durability with little change in the minimum resonance frequency with time.

本発明について以下に具体的に説明する。
本発明のポリケトン繊維を構成するポリケトンは、繰り返し単位の95モル%以上、好ましくは98モル%以上、特に99.6モル%以上が、上記式(1)で示される繰り返し単位であり、5モル%未満の範囲で、上記式(1)以外の繰り返し単位、例えば、下記式(2)に示すもの等を含有していても良い。

Figure 2008124589
但し式中、Rはエチレン以外の炭素数1〜30の有機基であり、例えば、プロピレン、ブチレン、1−フェニルエチレン等であり、Rの水素原子の一部または全部が、ハロゲン基、エステル基、アミド基、水酸基、エーテル基で置換されていてもよい。もちろん、Rは二種以上であってもよく、例えば、プロピレンと1−フェニルエチレンが混在していてもよい。 The present invention will be specifically described below.
In the polyketone constituting the polyketone fiber of the present invention, 95 mol% or more, preferably 98 mol% or more, particularly 99.6 mol% or more of the repeating unit is a repeating unit represented by the above formula (1), and 5 mol In the range of less than%, it may contain a repeating unit other than the above formula (1), for example, one represented by the following formula (2).
Figure 2008124589
In the formula, R is an organic group having 1 to 30 carbon atoms other than ethylene, such as propylene, butylene, 1-phenylethylene, etc., and a part or all of the hydrogen atoms of R are a halogen group or an ester group. , An amide group, a hydroxyl group and an ether group may be substituted. Of course, two or more types of R may be used. For example, propylene and 1-phenylethylene may be mixed.

ポリケトンの固有粘度[η]は、好ましくは1dl/g以上、より好ましくは2dl/g以上、特に好ましくは4dl/g以上、20dl/g以下、15dl/g以下、10dl/g以下が好ましい。
尚、固有粘度[η]は次の定義式に基づいて求められる値である。

Figure 2008124589
式中のt及びTは、それぞれヘキサフルオロイソプロパノール(セントラル硝子(株)社製)及び該ヘキサフルオロイソプロパノールに溶解したポリケトンの希釈溶液の25℃での粘度管の流過時間である。Cは、上記希釈溶液の濃度であり、ヘキサフルオロイソプロパノール100ml中のポリケトンの質量(g)である。
ポリケトンには、必要に応じて、酸化防止剤、ラジカル抑制剤、他のポリマー、艶消し剤、紫外線吸収剤、難燃剤、金属石鹸等の添加剤を含有していてもよい。 The intrinsic viscosity [η] of the polyketone is preferably 1 dl / g or more, more preferably 2 dl / g or more, particularly preferably 4 dl / g or more, 20 dl / g or less, 15 dl / g or less, and 10 dl / g or less.
The intrinsic viscosity [η] is a value obtained based on the following definition formula.
Figure 2008124589
In the formula, t and T are the flow times of the viscosity tube at 25 ° C. of hexafluoroisopropanol (manufactured by Central Glass Co., Ltd.) and a dilute solution of polyketone dissolved in the hexafluoroisopropanol, respectively. C is the concentration of the diluted solution and is the mass (g) of polyketone in 100 ml of hexafluoroisopropanol.
The polyketone may contain additives such as antioxidants, radical inhibitors, other polymers, matting agents, ultraviolet absorbers, flame retardants, and metal soaps as necessary.

次に、ポリケトン繊維の好ましい特性としては、引張強度は5cN/dtex以上、より好ましくは10cN/dtex以上、特に好ましくは15cN/dtex以上であり、30cN/dtex以下であり、引張伸度は3%以上、より好ましくは3.5%以上、特に好ましくは4%以上であり、8%以下、より好ましくは7%以下、特に好ましくは6%以下であり、引張弾性率は100cN/dtex以上、より好ましくは200cN/dtex以上、特に好ましくは300cN/dtex以上であり、1000cN/dtex以下である。
ポリケトン繊維の形態は、短繊維、長繊維のいずれでもよく、長さ方向に均一なものや太細のあるものでもよく、繊維の断面形状は、丸型、三角、L型、T型、Y型、W型、八葉型、偏平(扁平度1.3〜4程度のもので、W型、I型、ブーメラン型、波型、串団子型、まゆ型、直方体型等がある)、ドッグボーン型等の多角形型、多葉型、中空型や不定形なものでもよい。
Next, as preferable characteristics of the polyketone fiber, the tensile strength is 5 cN / dtex or more, more preferably 10 cN / dtex or more, particularly preferably 15 cN / dtex or more, 30 cN / dtex or less, and the tensile elongation is 3%. Or more, more preferably 3.5% or more, particularly preferably 4% or more, 8% or less, more preferably 7% or less, particularly preferably 6% or less, and the tensile elastic modulus is 100 cN / dtex or more, more Preferably it is 200 cN / dtex or more, Most preferably, it is 300 cN / dtex or more, and is 1000 cN / dtex or less.
The form of the polyketone fiber may be either short fiber or long fiber, and may be uniform or thick in the length direction. The cross-sectional shape of the fiber is round, triangular, L-shaped, T-shaped, Y Type, W type, Yaba type, flatness (with a flatness of about 1.3-4, W type, I type, boomerang type, wave type, skewer type, eyebrows type, rectangular parallelepiped type, etc.), dog It may be a polygonal shape such as a bone shape, a multileaf shape, a hollow shape or an irregular shape.

好ましい単糸繊度は、紡績糸やマルチフィラメント糸の場合は、0.01〜10dtex、より好ましくは0.1〜10dtex、特に好ましくは0.5〜5dtexであり、モノフィラメント糸の場合は、10〜100000dtexである。又、好ましい総繊度は10〜100000dtex、より好ましくは30〜50000dtexである。
ポリケトン繊維の糸条形態としては、紡績糸、マルチフィラメント糸、モノフィラメント糸であり、本発明の目的達成上、紡績糸、マルチフィラメント糸、特に紡績糸が好ましい。紡績糸を構成する短繊維の繊維長は20〜1500mmが好ましく、繊維長は、20〜76mm程度の定長のものでも、牽切紡績糸のように繊維長分布をもったもの、例えば、平均繊維長が70mm以上、より好ましくは100mm以上、特に200mm以上、さらには250mm以上であり、1500mm以下、1200mm以下、1000mm以下でもよい。紡績糸の種類としては、リング紡績糸やオープンエンド紡績糸、結束紡績糸等が挙げられる。
The preferred single yarn fineness is 0.01 to 10 dtex, more preferably 0.1 to 10 dtex, particularly preferably 0.5 to 5 dtex in the case of spun yarn or multifilament yarn, and 10 to 10 in the case of monofilament yarn. 100000 dtex. Moreover, a preferable total fineness is 10-100,000 dtex, More preferably, it is 30-50000 dtex.
The yarn form of the polyketone fiber is a spun yarn, a multifilament yarn, or a monofilament yarn, and a spun yarn or a multifilament yarn, particularly a spun yarn is preferable for the purpose of the present invention. The fiber length of the short fibers constituting the spun yarn is preferably 20 to 1500 mm, and the fiber length is a constant length of about 20 to 76 mm, but has a fiber length distribution like a check spun yarn, for example, average The fiber length is 70 mm or more, more preferably 100 mm or more, particularly 200 mm or more, further 250 mm or more, and may be 1500 mm or less, 1200 mm or less, or 1000 mm or less. Examples of the spun yarn include ring spun yarn, open end spun yarn, and bundle spun yarn.

本発明は、かかるポリケトン繊維を含有する布帛を基体とすることに特徴がある。
ポリケトン繊維を含有する布帛は、ポリケトン繊維100%で構成されていてもよいが、好ましくは50質量%以下の範囲内においてポリケトン繊維以外の繊維を用いても良く、ポリエステル繊維やポリアミド繊維、アクリル繊維、全芳香族ポリエステル繊維、ポリフェニレンサルファイド繊維、ポリイミド繊維、アラミド繊維(パラ系、メタ系)、ポリビニルアルコール繊維、ポリ(p−フェニレンベンゾビスオキサゾール)繊維、超高分子量ポリオレフィン繊維等公知の繊維を混用してもよい。混用の形態としては、混紡、複合紡績(サイロスパン、サイロフィル)、混繊、交撚、複合嵩高加工(仮撚、流体噴射加工等)、交編織(例えば織物では経糸及び/又は緯糸において、1〜5本交互に混用)等公知の手段を用いることができる。さらに布帛を構成する繊維同士(ポリケトン繊維同士や混用した繊維同士)は、希望に応じて、加圧及び/又は加熱手段により軟化や溶融させて、接着や融着させてもよい。
The present invention is characterized in that a fabric containing such a polyketone fiber is used as a substrate.
The fabric containing polyketone fibers may be composed of 100% polyketone fibers, but fibers other than polyketone fibers may be preferably used within the range of 50% by mass or less, and polyester fibers, polyamide fibers, and acrylic fibers. , Well-known fibers such as wholly aromatic polyester fibers, polyphenylene sulfide fibers, polyimide fibers, aramid fibers (para and meta), polyvinyl alcohol fibers, poly (p-phenylenebenzobisoxazole) fibers, and ultrahigh molecular weight polyolefin fibers May be. Examples of the mixed use include mixed spinning, composite spinning (silospan, silofil), mixed fiber, knotting, compound bulky processing (false twisting, fluid injection processing, etc.), union knitting fabric (for example, warp and / or weft for woven fabrics, 1 Well-known means such as ˜5 can be mixed alternately can be used. Furthermore, the fibers constituting the fabric (polyketone fibers or mixed fibers) may be softened or melted by pressurization and / or heating means, and bonded or fused as desired.

布帛としては、平、並び平、綾、朱子、模紗、絡み等の織物や、経編、緯編(横、丸)の編物が挙げられるが、平織物が好ましい。
本発明のスピーカー用ダンパーは、かかる布帛を基体として、これに賦形剤として、フェノール樹脂、メラミン樹脂等の熱硬化性樹脂を含浸、加熱下に金型中で加圧成形することにより得られる。賦形剤としては、かかる熱硬化性樹脂が一般的であるが、所望に応じてメラミン等の架橋剤によって硬化するポリエステル樹脂を用いてもよい。賦形剤の割合は、乾燥質量で布帛に対して15〜40質量%程度が好ましい。
Examples of the fabric include woven fabrics such as flat, side-by-side, twill, satin, imitation, and entanglement, and knitted fabrics of warp knitting and weft knitting (horizontal, round), but plain woven fabrics are preferred.
The speaker damper of the present invention is obtained by impregnating a thermosetting resin such as a phenol resin or a melamine resin as an excipient with the fabric as a base, and press-molding it in a mold under heating. . As the excipient, such a thermosetting resin is generally used, but if desired, a polyester resin that is cured by a crosslinking agent such as melamine may be used. The proportion of the excipient is preferably about 15 to 40% by mass with respect to the fabric in terms of dry mass.

本発明のスピーカー用ダンパーは、布帛の厚さが0.1〜0.7mm程度が好ましく、通常円盤状であって、同心円の波形が形つけられている。又、通気度は、JIS−L−1096に基づいて測定された通気度が70〜170cm3 /cm2 ・secの範囲が好ましい。
尚、例えば屋外で強い紫外線を受けることによってポリケトン繊維の引張強度等の低下が懸念される場合は、繊維又は布帛の形態で紫外線吸収材(例えば、ベンゾフェノン系、ベンゾトリアゾール系、ヒンダードアミン系の一種又は二種以上の組み合わせがある。)及び/又は紫外線遮蔽剤(例えば、酸化チタン、酸化鉄、酸化セリウム等の微粒子があり、平均粒径は0.01〜0.6μmが好ましい。)を含有させてもよい。含有させる方法としては、例えば、繊維又織物に紫外線吸収材及び/又は紫外線遮蔽剤を含有した樹脂やフィルムを付与又は被覆する方法があり、紫外線吸収材及び/又は紫外線遮蔽剤の含有量は、樹脂やフィルムの質量に対して0.001〜10質量%が好ましい。
The speaker damper of the present invention preferably has a fabric thickness of about 0.1 to 0.7 mm, and is usually disk-shaped and has a concentric waveform. Moreover, the air permeability measured based on JIS-L-1096 is preferably in the range of 70 to 170 cm 3 / cm 2 · sec.
For example, when there is a concern about a decrease in the tensile strength of the polyketone fiber by receiving strong ultraviolet rays outdoors, for example, an ultraviolet absorber (for example, a benzophenone type, a benzotriazole type, a hindered amine type or And / or an ultraviolet shielding agent (for example, fine particles such as titanium oxide, iron oxide, cerium oxide, etc., preferably having an average particle size of 0.01 to 0.6 μm). May be. As a method of containing, for example, there is a method of imparting or coating a resin or film containing an ultraviolet absorber and / or an ultraviolet shielding agent to a fiber or fabric, the content of the ultraviolet absorber and / or ultraviolet shielding agent is, 0.001-10 mass% is preferable with respect to the mass of resin or a film.

本発明を実施例などに基づいて更に具体的に説明するが、本発明はこれら実施例などにより何ら限定されるものではない。
本発明における測定方法及び評価方法は以下の通りである。
(1)引張強度、引張伸度、引張弾性率
JIS−L−1013に準じて測定する。
サンプル長:20cm、引張速度:20cm/分で測定し、20回測定した時の平均値を求める。
(2)耐久性
作製されたダンパーを用いた16cm口径のスピーカーの連続動作における最低共振周波数の経時変化(500時間後)で評価した。従来の綿布使いのスピーカー用ダンパーでは、変化率は−20%程度である。
○;変化率が−3%以下。
△;変化率が−4%〜−9%。
×;変化率が−10%以上。
The present invention will be described more specifically based on examples, but the present invention is not limited to these examples.
The measurement method and evaluation method in the present invention are as follows.
(1) Tensile strength, tensile elongation, tensile elastic modulus Measured according to JIS-L-1013.
Sample length: 20 cm, tensile speed: measured at 20 cm / min, and an average value is obtained when measured 20 times.
(2) Durability The evaluation was made by the change with time (after 500 hours) of the lowest resonance frequency in the continuous operation of the 16 cm diameter speaker using the produced damper. In a conventional damper for a speaker using cotton cloth, the rate of change is about -20%.
○: Change rate is −3% or less.
(Triangle | delta); Change rate is -4%--9%.
X: Change rate is -10% or more.

[実施例1]
1670dtex/1250fのポリケトン繊維(旭化成せんい(株)社製;商標名サイバロン;引張強度18cN/dtex、引張伸度5%、引張弾性率350cN/dtex)を合糸してトウとなし、常法のリング紡績法に従って、275dtexのリング紡績糸を得た。
得られた紡績糸を経糸及び緯糸に用いて、経糸密度、緯糸密度ともに38本/2.54cmの平織物を得た。
次いで、得られた織物にフェノール樹脂を含浸、乾燥し、加熱プレス工程により波形形状(コルゲーション)を形成後、型抜き工程により環状形状に打ち抜きダンパーを作製した。
得られたダンパーの耐久性は○であり優れたものであった。尚、成形性、成形品の寸法精度も優れたものであった。
[Example 1]
1670 dtex / 1250f polyketone fiber (manufactured by Asahi Kasei Fibers Co., Ltd .; trade name: Cyvalon; tensile strength 18 cN / dtex, tensile elongation 5%, tensile elastic modulus 350 cN / dtex) According to the ring spinning method, 275 dtex ring spun yarn was obtained.
The obtained spun yarn was used as a warp and a weft to obtain a plain woven fabric having a warp density and a weft density of 38 yarns / 2.54 cm.
Next, the resulting woven fabric was impregnated with a phenol resin and dried, and after forming a corrugated shape by a hot press process, a stamping damper was produced in an annular shape by a die cutting process.
The durability of the obtained damper was excellent and excellent. The moldability and the dimensional accuracy of the molded product were also excellent.

[比較例1]
実施例1において、ポリケトン繊維に代えて1670dtex/964fのパラ系アラミド繊維マルチフィラメント糸(引張強度20cN/dtex、引張伸度4.5%、引張弾性率500cN/dtex)を用いた以外は、実施例1と同様にしてダンパーを作製した。
得られたダンパーの耐久性は△であり実施例1と対比して劣ったものであった。
[比較例2]
20番手の綿糸を用いた以外は、実施例1と同様にしてダンパーを作製した。
得られたダンパーの耐久性は×であり実施例1と対比して大きく劣ったものであった。
[Comparative Example 1]
In Example 1, except for using 1670 dtex / 964f para-aramid fiber multifilament yarn (tensile strength 20 cN / dtex, tensile elongation 4.5%, tensile elastic modulus 500 cN / dtex) instead of polyketone fiber. A damper was produced in the same manner as in Example 1.
The durability of the obtained damper was Δ, which was inferior to that of Example 1.
[Comparative Example 2]
A damper was produced in the same manner as in Example 1 except that 20th cotton yarn was used.
The durability of the obtained damper was x, which was significantly inferior to Example 1.

本発明は、最低共振周波数の経時変化が少ない耐久性に優れたスピーカー用ダンパーを提供するものである。さらには、耐水性の要求される、例えば、自動車のドアに取り付けられるスピーカーの場合、ダンパーは、ウィンドーからの雨水や洗車の際の漏水により水の影響を受けやすいが、ポリケトン繊維は、吸水性が殆ど無いため極めて耐水性に優れたダンパーを提供できるものである。   The present invention provides a damper for a speaker excellent in durability with little change in the minimum resonance frequency with time. Furthermore, in the case of a speaker that is required to have water resistance, for example, a speaker attached to an automobile door, the damper is susceptible to water due to rain water from the window or water leakage during car washing, but the polyketone fiber is water-absorbing. Therefore, a damper having extremely excellent water resistance can be provided.

Claims (1)

繰り返し単位の95モル%以上が下記式(1)で示されるポリケトンで構成される繊維を含有する布帛を基体とすることを特徴とするスピーカー用ダンパー。
Figure 2008124589
A speaker damper, characterized in that a base material is a fabric containing a fiber composed of a polyketone represented by the following formula (1) wherein 95% by mole or more of the repeating units are represented by the following formula (1).
Figure 2008124589
JP2006303432A 2006-11-09 2006-11-09 Speaker damper Pending JP2008124589A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62230299A (en) * 1986-03-31 1987-10-08 Pioneer Electronic Corp Speaker diaphragm supoprting body
JPH02295300A (en) * 1989-05-10 1990-12-06 Onkyo Corp Speaker component and its manufacturing method
JPH08340596A (en) * 1995-02-23 1996-12-24 Teijin Ltd Damper for speaker and its manufacture
JP2001164422A (en) * 1999-12-07 2001-06-19 Asahi Kasei Corp Polyketone fiber and manufacturing method thereof
JP2003089954A (en) * 2001-09-14 2003-03-28 Asahi Kasei Corp Acoustic vibration member

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62230299A (en) * 1986-03-31 1987-10-08 Pioneer Electronic Corp Speaker diaphragm supoprting body
JPH02295300A (en) * 1989-05-10 1990-12-06 Onkyo Corp Speaker component and its manufacturing method
JPH08340596A (en) * 1995-02-23 1996-12-24 Teijin Ltd Damper for speaker and its manufacture
JP2001164422A (en) * 1999-12-07 2001-06-19 Asahi Kasei Corp Polyketone fiber and manufacturing method thereof
JP2003089954A (en) * 2001-09-14 2003-03-28 Asahi Kasei Corp Acoustic vibration member

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