JP6718108B2 - 音響振動板 - Google Patents
音響振動板 Download PDFInfo
- Publication number
- JP6718108B2 JP6718108B2 JP2016006023A JP2016006023A JP6718108B2 JP 6718108 B2 JP6718108 B2 JP 6718108B2 JP 2016006023 A JP2016006023 A JP 2016006023A JP 2016006023 A JP2016006023 A JP 2016006023A JP 6718108 B2 JP6718108 B2 JP 6718108B2
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- JP
- Japan
- Prior art keywords
- acoustic diaphragm
- cellulose
- cellulose nanofibers
- pulp
- diaphragm
- 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.)
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- 239000001913 cellulose Substances 0.000 claims description 47
- 229920002678 cellulose Polymers 0.000 claims description 46
- 239000002121 nanofiber Substances 0.000 claims description 39
- 239000000835 fiber Substances 0.000 claims description 26
- 239000002655 kraft paper Substances 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000002023 wood Substances 0.000 claims description 2
- 235000010980 cellulose Nutrition 0.000 description 38
- 238000000034 method Methods 0.000 description 14
- 229920001131 Pulp (paper) Polymers 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 9
- 238000000465 moulding Methods 0.000 description 8
- 239000000123 paper Substances 0.000 description 7
- 239000011122 softwood Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 239000004745 nonwoven fabric Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 4
- 239000011121 hardwood Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 3
- 238000010009 beating Methods 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 240000000797 Hibiscus cannabinus Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920000168 Microcrystalline cellulose Polymers 0.000 description 1
- 229920001410 Microfiber Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 235000014676 Phragmites communis Nutrition 0.000 description 1
- 244000082204 Phyllostachys viridis Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 238000005903 acid hydrolysis reaction Methods 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 229920003235 aromatic polyamide Polymers 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 235000019813 microcrystalline cellulose Nutrition 0.000 description 1
- 239000008108 microcrystalline cellulose Substances 0.000 description 1
- 229940016286 microcrystalline cellulose Drugs 0.000 description 1
- 239000003658 microfiber Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 229920003124 powdered cellulose Polymers 0.000 description 1
- 235000019814 powdered cellulose Nutrition 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000009774 resonance method Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
- D21H11/18—Highly hydrated, swollen or fibrillatable fibres
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
- H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/021—Diaphragms comprising cellulose-like materials, e.g. wood, paper, linen
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/023—Diaphragms comprising ceramic-like materials, e.g. pure ceramic, glass, boride, nitride, carbide, mica and carbon materials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/025—Diaphragms comprising polymeric materials
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
- H04R2307/029—Diaphragms comprising fibres
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R7/00—Diaphragms for electromechanical transducers; Cones
- H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
- H04R7/12—Non-planar diaphragms or cones
- H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
- H04R7/125—Non-planar diaphragms or cones comprising a plurality of sections or layers comprising a plurality of superposed layers in contact
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Manufacturing & Machinery (AREA)
- Signal Processing (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
Description
1つの実施形態においては、上記セルロースナノファイバーが、未酸化セルロースナノファイバーである。
1、ヤング率および内部損失(tanδ)の測定
振動リード法(片持梁、共振法)により、得られた平板のヤング率および内部損失(tanδ)を測定した。具体的には、実施例および比較例で得られた平板から、それぞれ、40mm×15mmサイズのテストピースを5片切り出し、各テストピースについて、23℃におけるヤング率および内部損失(tanδ)を測定した。表中には、5片のテストピースの平均値を示す。
実施例および比較例で得られた平板から、それぞれ、40mm×15mmサイズのテストピースを5片切り出した。ダイアルシックネスゲージを用い、各片につき4点(すなわち、4点×5片の計20点)の厚みおよび重量を測定して、その値から密度の平均値を求めた。
実施例および比較例で得られた平板から、それぞれ、50mm×50mmサイズのテストピースを5片切り出し、JIS P 8117に準拠し測定した。その平均値を表中に示す。
抄網として不織布(ポリエステルマイクロファイバー(3μm)+ポリウレタン樹脂5%、目付:140±10g/m2、厚み:0.55±0.06mm)を用いた抄紙タンクに、針葉樹由来のセルロースナノファイバー(中越パルプ工業社製、繊維径:約20nm)の0.1重量%懸濁液を注入し、抄紙し、その後、成形金型を用いて熱プレスして、マイクロナノファイバーのみからなる平板(坪量:43.7g/m2)を得た。得られた平板を上記評価1〜3に供した。結果を表1に示す。
実施例1と同様の材料、条件にて抄紙し、その後、成形金型を用いて熱プレスして、マイクロナノファイバーのみからなるヘッドフォンドライバ用振動板を得た。該振動板について、周波数特性を測定し、音質を評価した。結果を図1に示す。
BKP(叩解度500cc)を抄紙し、プレス乾燥して、BKPのみからなる平板(坪量:48.5g/m2)を得た。得られた平板を上記評価1〜3に供した。結果を表1に示す。
比較例1と同様の材料、条件にて抄紙し、その後、成形金型を用いて熱プレスして、BKPのみからなるヘッドフォンドライバ用振動板を得た。該振動板について、周波数特性を測定し、音質を評価した。結果を図1に示す。
BKP(叩解度500cc)100部に針葉樹由来のセルロースナノファイバー(中越パルプ工業社製、繊維径:約20nm)20部を配合して混抄し、その後、成形金型を用いて熱プレスして、ヘッドフォンドライバ用振動板を得た。該振動板について、周波数特性を測定し、音質を評価した。結果を図1に示す。
Claims (3)
- セルロースナノファイバーを含む抄紙体から構成される、音響振動板であって、
該セルロースナノファイバーの含有割合が、該音響振動板100重量部に対して、90重量部以上であり、
該セルロースナノファイバーが、木材由来のクラフトパルプをセルロース原料とするセルロースナノファイバーである、
音響振動板。 - 前記セルロースナノファイバーが、未酸化セルロースナノファイバーである、請求項1に記載の音響振動板。
- 前記セルロースナノファイバーの繊維径(数平均径)が、3nm〜100nmである、請求項1または2に記載の音響振動板。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016006023A JP6718108B2 (ja) | 2016-01-15 | 2016-01-15 | 音響振動板 |
US15/341,044 US9818395B2 (en) | 2016-01-15 | 2016-11-02 | Acoustic diaphragm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016006023A JP6718108B2 (ja) | 2016-01-15 | 2016-01-15 | 音響振動板 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2017126946A JP2017126946A (ja) | 2017-07-20 |
JP6718108B2 true JP6718108B2 (ja) | 2020-07-08 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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JP2016006023A Active JP6718108B2 (ja) | 2016-01-15 | 2016-01-15 | 音響振動板 |
Country Status (2)
Country | Link |
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US (1) | US9818395B2 (ja) |
JP (1) | JP6718108B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109024067A (zh) * | 2018-09-18 | 2018-12-18 | 深圳市烽火宏声科技有限公司 | 石墨烯扬声器纸盆及其制造方法、扬声器 |
JP2020092339A (ja) | 2018-12-06 | 2020-06-11 | ヤマハ株式会社 | スピーカー振動板及びヘッドフォン |
EP4161094A4 (en) * | 2020-06-02 | 2024-07-03 | Foster Electric Co Ltd | ELECTROACOUSTIC TRANSDUCER MEMBRANE |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07112312B2 (ja) * | 1990-04-27 | 1995-11-29 | オンキヨー株式会社 | 電気音響変換器用振動板 |
KR100904939B1 (ko) * | 2004-11-22 | 2009-06-29 | 하르만 인터내셔날 인더스트리즈, 인코포레이티드 | 라우드스피커 플라스틱 콘 몸체 |
JP2007208809A (ja) * | 2006-02-03 | 2007-08-16 | Daicel Chem Ind Ltd | 音響振動板及びその製造方法 |
JP4793015B2 (ja) * | 2006-02-20 | 2011-10-12 | パナソニック株式会社 | スピーカ用振動板およびこれを用いたスピーカならびにこのスピーカを用いた電子機器および装置 |
JP2011130401A (ja) | 2009-12-21 | 2011-06-30 | Bifristec Kk | 音響機器用塗料 |
JP5975458B2 (ja) | 2011-08-18 | 2016-08-23 | フォスター電機株式会社 | 電気音響変換器用振動板の製造方法 |
JP2013153416A (ja) * | 2011-12-26 | 2013-08-08 | D & M Holdings Inc | ヘッドホン及びヘッドホンドライバー |
JP6500236B2 (ja) * | 2013-07-25 | 2019-04-17 | パナソニックIpマネジメント株式会社 | ラウドスピーカ用振動板と、その振動板を用いたラウドスピーカ、および電子機器と、移動体装置 |
CN105453589A (zh) * | 2013-08-01 | 2016-03-30 | 松下知识产权经营株式会社 | 扬声器用振动板、扬声器、以及电子设备、移动体装置 |
WO2016038813A1 (ja) * | 2014-09-08 | 2016-03-17 | パナソニックIpマネジメント株式会社 | ラウドスピーカ用振動板と、その振動板を用いたラウドスピーカ、および電子機器と、移動体装置 |
-
2016
- 2016-01-15 JP JP2016006023A patent/JP6718108B2/ja active Active
- 2016-11-02 US US15/341,044 patent/US9818395B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20170206885A1 (en) | 2017-07-20 |
JP2017126946A (ja) | 2017-07-20 |
US9818395B2 (en) | 2017-11-14 |
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