CN101375631A - Diaphragm for electro-acoustic transducer - Google Patents
Diaphragm for electro-acoustic transducer Download PDFInfo
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- CN101375631A CN101375631A CNA2007800033111A CN200780003311A CN101375631A CN 101375631 A CN101375631 A CN 101375631A CN A2007800033111 A CNA2007800033111 A CN A2007800033111A CN 200780003311 A CN200780003311 A CN 200780003311A CN 101375631 A CN101375631 A CN 101375631A
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Abstract
Disclosed is a diaphragm for electro-acoustic transducers, especially a diaphragm for speakers, which is excellent in moldability and durability during high output operation. Also disclosed is a film for such a diaphragm. Specifically disclosed is a diaphragm for electro-acoustic transducers, which is obtained by molding a film containing a polybiphenyl ether sulfone resin (A) having a specific repeating unit, or alternatively containing the polybiphenyl ether sulfone resin (A) and a crystalline resin (B) such as a polyarylketone resin. Also specifically disclosed is a film used for such a diaphragm.
Description
Technical field
The present invention relates to the diaphragm for electro-acoustic transducer that in various stereo sets, uses and the film that is used for this diaphragm for electro-acoustic transducer.
Background technology
Along with popularizing of miniaturized electronics (for example mobile phone, PDA, notebook computer, DVD, liquid crystal TV, digital camera, portable music player etc.), the demand that is used for miniature electro-acoustic converters such as the miniature loudspeaker (being commonly referred to Microspeaker) of these electronic equipments, small-sized receiver and microphone, earphone increases gradually.In general, for the loud speaker vibrating reed, not only require its density low to keep sound equipment sound radiation pressure level, require its rigidity by force to suppress distortion, to keep big permission input, and require its relative resilient modulus to reappear frequency band with expansion greatly, and require its internal losses greatly to suppress subharmonic vibration (cutting apart the Move that shakes), to make frequency characteristic flat.In addition, when in the speaker drive source be sounding coil (ボ イ ス コ イ Le) on every side or when using in the vehicle-mounted loudspeaker, vibrating reed will be exposed in the high temperature for a long time, therefore, under this service condition, it also must possess sufficient thermal endurance.
On the other hand, moving, under immanent society (ubiquitous society) or the digitized background of musical works, carrying out multifunction, the high performance of various miniaturized electronicss in recent years.The loud speaker aspect of Shi Yonging therein, for example, with the permission input and output of vibrating reed, generally requiring it is 0.3W (universal models) for mobile telephone speaker, and in the high performance type number it is increased to above (the present upper limit is about 1.2W) about 0.5～0.6W.In addition, the model that at present commonly used is about 0.6～0.8W, and it is actually rare to surpass the model of 1.0W.
For example, about the loud speaker vibrating reed, patent documentation 1～3 discloses a kind of loud speaker vibrating reed, and it is with the aromatic series polysulfone resin, particularly the film forming made of polyethersulfone resin obtains.In these patent documentations, put down in writing:, make loud speaker all good with the mouldability of vibrating reed, thermal endurance, acoustic characteristic etc. by using the film of making by polyethersulfone resin.Yet the loud speaker of putting down in writing in these patent documentations with the problem of vibrating reed is: the be full of cracks of vibrating reed or breakage etc., take place in durability not insufficient during high output easily.In addition, in these patent documentations, do not put down in writing and discuss the structure of aromatic series polysulfone resin, particularly, there is not record not have to discuss the film forming of making by aromatic series polysulfone resin and the loud speaker vibrating reed that obtains with specific repetitive yet, and the durability of height when exporting.
Patent documentation 4 discloses a kind of by polyethers aromatic ketone resin, particularly is polyether-ether-ketone resin moulding and the loud speaker vibrating reed that obtains.Put down in writing in this patent documentation: the modulus of elasticity of polyether-ether-ketone resin made membrane is 30,000kg/cm
2(about 3000MPa), because should be worth height, performance is good aspect high sound reproducing.Yet, do not put down in writing the low sound reproducing of little loud speaker or little loud speaker in this patent documentation, also durability, the mouldability of vibrating reed when height is exported of just not made by the mixture of polyethers aromatic ketone resin and other resin is described and inquires into.
On the other hand, the good loud speaker vibrating reed of durability when exporting as height uses biaxial stretch-formed heat fixation films such as PEN resin (PEN) film or polyphenylene sulfide (PPS) film.Yet these films are crystalline, and its rigidity is strong excessively, and the problem of existence is: lowest resonance frequency (f
0) height, the not good for example bass of acoustic characteristic reappearance is bad, and particularly the film made of the mouldability of vibrating reed (compression moulding or vacuum forming etc.), non-crystalline resin (Polyetherimide etc.) that moulding recycle ratio glass transition temperature (Tg) is high is poor.
Patent documentation 1: the spy opens clear 60-139099 communique
Patent documentation 2: the spy opens clear 59-63897 communique
Patent documentation 3: the spy opens the 2002-291092 communique
Patent documentation 4: the spy opens clear 58-222699 communique
Summary of the invention
The problem that the present invention will solve
The good diaphragm for electro-acoustic transducer of durability when the object of the present invention is to provide mouldability and high output, and the film that is used for this vibrating reed.
The method of dealing with problems
That is, the invention provides:
(1) a kind of diaphragm for electro-acoustic transducer, it is formed through moulding by the film that contains poly biphenyl ether sulphone resin (A), and described poly biphenyl ether sulphone resin (A) has the repetitive of following structural formula (1) expression:
In the formula, R
1～R
4Be independently-O-,-SO
2-,-S-or C=O, but R
1～R
4In have at least one to be-SO
2-, and R
1～R
4In have at least one to be-O-; Ar
1～Ar
3Independently for having the arlydene of 6～24 carbon atoms; A and b are respectively 0 or 1;
(2) a kind of diaphragm for electro-acoustic transducer, it is formed through moulding by the film that contains poly biphenyl ether sulphone resin (A) and crystalline resin (B), and described poly biphenyl ether sulphone resin (A) has the repetitive of said structure formula (1) expression; With
(3) be used for the film of the diaphragm for electro-acoustic transducer of above-mentioned (1) or (2).
The invention effect
According to the present invention, the good diaphragm for electro-acoustic transducer of durability when may be provided in type and high output, and the vibrating reed film that is used for this vibrating reed.
Embodiment
Below, explain the present invention.
In this specification, " principal component " is meant the composition that content is maximum, and its content is generally more than the 50 quality %, is preferably more than the 80 quality %.
Loud speaker of the present invention is formed by the film forming that contains poly biphenyl ether sulphone resin (A) with vibrating reed.Here, the poly biphenyl ether sulphone resin is meant and comprises fragrant nuclear bond (aromatic proton in its construction unit
Close aromatic nucleus bond), the thermoplastic resin of sulfonic acid key, ehter bond and biphenyl key, promptly have the aromatic series polysulfone resin of the repetitive of following structural formula (1) expression:
In the formula, R
1～R
4Be independently-O-,-SO
2-,-S-or C=O, from aspects such as thermal stability and processing and forming, be preferably-O-,-SO
2-.R
1～R
4In have at least one to be-SO
2-, and R
1～R
4In have at least one to be-O-.Ar
1, Ar
2And Ar
3For having the arlydene of 6～24 carbon atoms,, be preferably phenylene or biphenylene independently from aspects such as thermal endurance, rigidity.A and b are respectively 0 or 1.
Usually, the biphenyl in the poly biphenyl ether sulphone resin (A) or the concentration of biphenylene are high more, and characteristics such as the resistance to impact of polymer are just good more.In view of this, in the repetitive of structural formula (1) expression, arlydene Ar
1, Ar
2And Ar
3Be preferably above, more preferably above various of 75 moles of % of 50 moles of % to the such biphenylene of biphenylene.By containing biphenylene as necessary construction unit, the durability in the time of can obtaining good height output.In addition, the number of repeat unit of structural formula (1) is generally 1～100 integer, and the angle of collateral security engineering properties is set out, and is fit to get 20～50.
Herein, the poly biphenyl ether sulphone resin as the repetitive with structural formula (1) expression has the resin with various combination repetitives, in the present invention, glass transition temperature (Tg) is preferably 150～320 ℃, and more preferably 160～300 ℃, more preferably 180～250 ℃.If glass transition temperature (Tg) more than above-mentioned lower limit, then the speaker drive source be around the sounding coil or vehicle-mounted loudspeaker etc. in when using, also have sufficient thermal endurance, so be preferred; On the other hand, if glass transition temperature (Tg) below above-mentioned higher limit, then can carry out the moulding (compression moulding or vacuum forming etc.) of vibrating reed under lower temperature, be preferred therefore.
In the present invention, aspects such as durability during from the processability of the system film processability of film, vibrating reed, thermal endurance, acoustic characteristic and high output consider, suitable especially use repetitive with following structural formula (2) expression, glass transition temperature (Tg) is that 220 ℃ Poly-s 179 resin is as poly biphenyl ether sulphone resin (A).Particularly, can (company of ソ Le ベ イ ア De バ Application ス ト Port リ マ-ズ) buys, and its commodity are called " Radel R " from Solvay Advanced Polymers.
Manufacture method for the poly biphenyl ether sulphone resin (A) that uses among the present invention does not have particular restriction, can adopt known method.These No. 4008203, No. 4108837, have detailed description in the specification of No. 4175175 grade No. the 3634355th, United States Patent (USP) for example.In addition, can directly use commercially available resin.1 kind of poly biphenyl ether sulphone resin can be used separately, also poly biphenyl ether sulphone resin more than 2 kinds can be used in combination aptly.
In addition, diaphragm for electro-acoustic transducer of the present invention can use the film that contains above-mentioned poly biphenyl ether sulphone resin (A), aspects such as durability during from the processability of vibrating reed, acoustic characteristic and high output consider, preferably constitute to contain above, more preferably above, the further described poly biphenyl ether sulphone resin (A) of preferred 80 quality % of 60 quality % of 50 quality % in the resin combination of described film.
In addition, optionally can in the resin combination that constitutes described film, mix other resin.Aspects such as durability during from the processability of vibrating reed, acoustic characteristic and high output are considered, mixing quality during mixing is than preferred poly biphenyl ether sulphone resin (A)/other resin=1～99/99～1, more preferably 30～90/70～10, further preferred 50～80/50～20.
Herein, as other resin, do not have particular restriction, can list for example vistanex, polyamide, mylar, syndiotactic polystyrene resin, polyurethane resin, polysulfone resin, polyethersulfone resin, polyether ketone resin, polyether-ether-ketone resin, polyarylate resin, polyamide-imide resin, polycarbonate resin, modified polyphenylene ether resin, polyetherimide resin, thermoplastic polyimide resin, polyethers nitrile resin, liquid crystal polymer and thermoplastic elastomer (TPE) etc.; And in the present invention,, be fit to use polyether ketone resin, polyether-ether-ketone resin and polyetherimide resin from considering with the Combination of poly biphenyl ether sulphone resin, the viewpoints such as system film processability of film, be particularly suitable for using polyether-ether-ketone resin.For other resin of these mixing, can use wherein a kind separately, also can make up use more than 2 kinds wherein aptly.
Diaphragm for electro-acoustic transducer of the present invention can also be by containing poly biphenyl ether sulphone resin (A) and forming through moulding as the film of the crystalline resin (B) of other resin.
As poly biphenyl ether sulphone resin (A), as mentioned above.
Crystalline resin (B) is meant the resin that can observe its crystallization fusion peak temperature (Tm) by the differential scanning calorimetry, can list for example vistanex, polyamide, mylar, syndiotactic polystyrene resin, polyphenylene sulfide, polyketone resin, poly-aryl ketones resin, thermoplastic polyimide resin, polyethers nitrile resin etc., can use wherein a kind separately, also can make up use more than 2 kinds wherein aptly.
The crystallization fusion peak temperature (Tm) of crystalline resin (B) is preferably 260～380 ℃, more preferably 280～380 ℃.Herein, if crystallization fusion peak temperature then can improve the thermal endurance of diaphragm for electro-acoustic transducer of the present invention, the thermal endurance in for example reflow step more than 260 ℃.On the other hand, if crystallization fusion peak temperature then for example can use equipment commonly used in the film melt molding to process in lower temperature (430 ℃ of ceiling temperatures) below 380 ℃.
Further, the crystallization of crystalline resin (B) fusion peak temperature (Tm) preferably satisfies following relation: Tg＜Tm with the glass transition temperature (Tg) of poly biphenyl ether sulphone resin (A), and more preferably Tm is higher more than 30 ℃ than Tg.Herein, if satisfy above-mentioned relation, then by film being carried out hot-forming the grade when processing vibrating reed, even then the Temperature Distribution in the film appears at the above temperature range of glass transition temperature (Tg) of poly biphenyl ether sulphone resin (A), the drawdown (drawdown) that still can suppress film, can also improve the stress-deformation curve in processing temperature interval, consequently can produce the good vibrating reed of thickness and precision.
Among the present invention, be fit to use poly-aryl ketones resin because its with the Combination of poly biphenyl ether sulphone resin (A) well and the processing and forming temperature range close, thermal endurance and mechanical property are good.Here, poly-aryl ketones resin is meant and contains fragrant ring key in its construction unit, the thermoplastic resin of ehter bond and ketonic bond, its representational example has polyether ketone resin, polyether-ether-ketone resin, polyethylene-ketone-ketone resin etc., but in the present invention, suitable use has the polyether-ether-ketone resin of the repetitive of following structural formula (3) expression, because the Combination (compatibility) of itself and poly biphenyl ether sulphone resin (A) is good and the processing and forming temperature range is close, thermal endurance and mechanical property are good, in addition from the system film processability of film, the processability of vibrating reed, thermal endurance, aspects such as durability when acoustic characteristic and high output consider that it also is suitable.
The number of repeat unit of structural formula (3) is generally 1～150 integer, considers that from guaranteeing viewpoints such as mechanical properties or Rong Rong are mixing, processing and forming type the preferred repeat units number is 30～70.
Particularly, can buy from following company: VICTREX company, its commodity are called VICTREXPEEK " 151G ", " 381G ", " 450G "; DEGUSSA company, its commodity are called VESTAKEEP " 2000G ", " 3001G ", " 4000G "; Solvay Advanced Polymers company, its commodity are called KetaSpirePEEK " KT-820NT ", " KT-880NT "; GhardaChemicals (ガ Le-ダ ケ ミ power Le) company, its commodity are called GATONE PEKK " 5300 ", " 5400 ", " 5600 ", or the like.
Among the present invention, above-mentioned poly biphenyl ether sulphone resin (A) is preferably poly biphenyl ether sulphone resin (A)/crystalline resin (B)=95～50/5～50 with the mixing quality ratio of crystalline resin (B).Herein, this mixing quality ratio is preferred, because if be this mixing quality ratio, the then common film forming matrix of non-crystalline resin poly biphenyl ether sulphone resin (A) (sea), in the man-hour that adds of carrying out vibrating reed by hot-forming grade, processability and circulation thereof are good, in addition, good equally by the various adhesives (for example UV such as acrylic compounds, epoxies curing type or solvent cutback etc.) or the adhesiveness of organic solvent and sounding coil or framework.And, (B) improved thermal endurance, solvent resistance etc. by crystalline resin, in the man-hour that adds of carrying out vibrating reed by hot-forming grade, can improve the stress-deformation curve in processing temperature interval, and as a result of, can make thickness and precision, the good vibrating reed of deep drawability (deep drawability), be preferred therefore.Thus, in the present invention, the mixing quality ratio of poly biphenyl ether sulphone resin (A) and crystalline resin (B) is preferably 95～55/5～45 with (A)/(B) expression, and more preferably 90～60/10～40, preferred (A)/(B) is 85～65/15～35 especially.
Above-mentioned diaphragm for electro-acoustic transducer, the preferred use contained described poly biphenyl ether sulphone resin (A) and the film of crystalline resin (B) as principal component, constitute in the resin combination of this film, optionally can further mix other resin that 30 quality % are following, preferred 20 quality % are following.
Herein, as other resin, there is not particular restriction, can list polyurethane resin, polysulfone resin, polyethersulfone resin, polyarylate resin, polycarbonate resin, modified polyphenylene ether resin, polyetherimide resin, thermoplastic polyimide resin, liquid crystal polymer and thermoplastic elastomer (TPE) etc., and in the present invention, from considering, be fit to use polysulfone resin and polyetherimide resin with the Combination of principal component resin, the aspects such as system film processability of film.Other resin of these mixing can use wherein a kind separately, also can make up use more than 2 kinds wherein aptly.
And, contain in the resin combination of film of poly biphenyl ether sulphone resin in formation, only otherwise exceed purport of the present invention, can mix packing material, various additive aptly, for example heat stabilizer, ultra-violet absorber, light stabilizer, nucleator, colouring agent, lubricant, fire retardant etc.
Below, film and the manufacture method thereof used in the moulding to diaphragm for electro-acoustic transducer of the present invention describe.At first, the film-forming method as film does not have particular restriction, and that can adopt that known method for example uses the T mould extrudes injection moulding, rolling process, perhaps The tape casting etc., but consider from the aspects such as production performance of film, use the T mould to extrude injection moulding comparatively suitable.Use the forming temperature of extruding injection moulding of T mould, can adjust aptly, be generally more than 300 ℃ and below 430 ℃ according to the flow behavior of employed composition, system film etc.For melting mixing, there is not particular restriction, can use normally used single shaft extruder, biaxial extruder, kneader or mixer etc., but consider from the stable aspect of the various character of the homogeneous dispersiveness of blended resin composition, gained film, can use biaxial extruder, particularly biaxial extruder in the same way.
Thickness for the film that is used for diaphragm for electro-acoustic transducer of the present invention is not particularly limited, and as diaphragm for electro-acoustic transducer, particularly loud speaker vibrating reed, is expressed as 5～150 μ m with average thickness, is generally about 8～100 μ m.Herein, the thickness and precision of film (%) ([(film thickness-average thickness)/average thickness)] * 100) can influence reappear acoustic characteristics such as frequency band, frequency characteristic, therefore preferably in ± 10%, more preferably in ± 8%, further preferably in ± 5%.In addition, the system film should preferably satisfy following condition: make film not have the anisotropy of rerum natura on its direction from the outflow of extruder (MD direction) and the direction (TD direction) vertical with this direction as far as possible.
In addition, the tensile modulus of elasticity of above-mentioned film is preferably more than the 1000MPa and less than 3000MPa.Herein, if tensile modulus of elasticity is more than the 1000MPa, then it possesses the rigidity that can be used as the diaphragm for electro-acoustic transducer use; On the other hand, if tensile modulus of elasticity is less than 3000MPa, then for example under the situation of Microspeaker vibrating reed, even adopt the film of 20～40 μ m thick (durability when this thickness operability and high output etc. are all good), lowest resonance frequency (f
0) still enough low, thereby guaranteed the reappearance of bass area, obtained good sound quality, be preferred therefore.Thus, in the present invention, above-mentioned modulus of elasticity is more preferably more than the 1000MPa and less than 2500MPa, more preferably more than the 2000MPa and less than 2500MPa.
Herein, for example, the tensile modulus of elasticity of poly-naphthalenedicarboxylic acid ethylene glycol resin (PEN) film is about 6000Mpa, therefore, and in order in the vibrating reed of the Microspeaker of mobile phone etc., to reduce lowest resonance frequency (f
0), thickness that must the attenuate film, and factors such as operability, static also can become remarkable to the influence of vibrating reed processing technology.
The film of Huo Deing is further processed into diaphragm for electro-acoustic transducer like this.Here, be that example describes with the loud speaker vibrating reed.For processing method, there is not particular restriction, can be on the basis of considering the glass transition temperature of this film, softening temperature, adopt hot-forming, vacuum forming etc. to be processed into dome shape or taper etc.In addition, be not particularly limited for the shape of vibrating reed, it can be arbitrarily, can choose circle, ellipse, avette etc. wantonly.
The tensile modulus of elasticity of the film that uses among the present invention is lower, and particularly when being used for miniature electro-acoustic converter and using vibrating reed, thereby the reappearance that can guarantee bass area obtains good sound quality, is preferred therefore.Herein, as the size of vibrating reed,, use below following, the preferred 20mm of maximum diameter 25mm, and the goods that lower limit is generally about 5mm are suitable from the viewpoint of miniaturization and.And maximum diameter is got its diameter when circular at vibrating reed, when vibrating reed is got its major diameter when oval or avette.
As described above, shape to vibrating reed among the present invention does not have particular restriction, it can be arbitrarily, can choose circle, ellipse, avette etc. wantonly, but more preferably for example, such have the sounding coil and keep with the vibrating reed of recess etc. for what the spy opened that flat 5-30592 communique, spy open record such as flat 11-146487 communique, when requiring its deep drawability, the tension fracture elongation rate of used film in the processing temperature interval is at least more than 100%, be preferably more than 200%, be preferably more than 300% especially.Higher limit is generally about 600%.Herein, preferred especially tension fracture elongation rate is the film more than 300%, because it can stably process the vibrating reed of different shape, and rare fracture accident etc.
And can give shape of cross section aptly on the vibrating reed surface be ditch of V font etc., and it is called as tangential edge (tangential edge).At this moment, if the average thickness of film is below the 40 μ m, be preferably 20～38 μ m, then fully guaranteed thickness, operability is good, and improves processability, the machining accuracy (reappearance of shape) of the unit interval of compression moulding etc. easily, therefore, this is preferred.In addition, for flexibility (adaptability) of operation, dust tightness or the acoustic characteristic etc. of adjusting vibrating reed, can further carry out suitable processing to the surface of the vibrating reed after used film or the moulding, for example apply antistatic agent or various elastomer (for example polyurethanes, polysiloxane-based, hydro carbons, fluorine class etc.), by steam deposition or sputter metal lining, perhaps dye (black or white etc.) etc.And, can be suitably and metal or other pellicular cascades such as aluminium, perhaps carry out compoundization etc. with nonwoven fabrics.
Diaphragm for electro-acoustic transducer of the present invention, when for example being used for speaker diaphragm, the durability when having good height output.For example, aspect mobile phone, and compare about the 0.3W of universal models, its anti-output level reaches about the 0.6～1.0W that is applicable to high performance type number.In addition, the poly biphenyl ether sulphone resin is generally the high heat stable resin of amorphism, therefore the film that contains poly biphenyl ether sulphone resin (A), the film that particularly contains poly biphenyl ether sulphone resin (A) and crystalline resin (B), especially contain above-mentioned resin (A) or above-mentioned resin (A) and resin (B) film as principal component, not only possess as loud speaker with vibrating reed, particularly Microspeaker with the basic acoustic characteristic of vibrating reed, but also possess the mouldability that good thermal endurance and vibrating reed add man-hour.
In sum, aspects such as durability during from thermal endurance, acoustic characteristic and high output are considered, diaphragm for electro-acoustic transducer of the present invention is adapted at loud speaker with using in the vibrating reed, but the scope of application as diaphragm for electro-acoustic transducer of the present invention, except that loud speaker, it also is applicable to all electroacoustic transducing devices such as receiver, microphone, earphone, and the Microspeaker that is particularly suitable as mobile phone uses.
Embodiment
Below, by embodiment the present invention is carried out more specific description, but the present invention is not subjected to any restriction of these embodiment.And, various measured values and following the carrying out of evaluation that provide in this specification about film.Here, film is called vertically from the direction that extruder flows out, its vertical direction is called laterally.
(1) glass transition temperature (Tg), crystallization fusion peak temperature (Tm)
The DSC-7 that uses Perkin Elmer ' s company to produce heats the 10mg sample with 10 ℃/minute firing rate according to JIS K7121, obtains the thermal analysis curue of this moment.
(2) film proportion
For the film that obtains, measure according to JIS K7112 (D method).
(3) tensile modulus of elasticity
For the film that obtains laterally, measure under the condition of 23 ℃ of temperature according to JIS K7127.
(4) tension fracture elongation rate (200 ℃)
For the film that obtains vertically, according to JIS K7127 under 200 ℃ of temperature, measure with 200mm/ minute test speed.In addition, also mark the result who estimates by following standard.
(◎) tension fracture elongation rate is more than 300%
(zero) tension fracture elongation rate is more than 100% but less than 300%
(*) tension fracture elongation rate is less than 100%
(5) durability evaluation
The film that obtains 230 ℃ of heating, is pressed, thereby obtains having the circular dome-shaped vibrating reed of the φ 16mm at tangential edge.Make the micro loudspeaker unit that constitutes by sounding coil, magnet, framework, buffer etc. then.With the Microspeaker that obtains and durability test machine (SIGMA electronics (strain), port ST-2000B) connects, under the EIA pattern of white noise (ホ ワ イ ト ノ イ ズ), the state of vibrating reed when estimating varying duty.
And, in embodiment 1,2 and comparative example 1, above-mentioned evaluation is at durability test machine (SIGMA electronics (strain), ST-2000B) under the EIA pattern of white noise, with 0.3W (1.55V), 0.7W (2.37V), these 3 horizontal varying duties of 1.0W (2.83V), by the state (evaluation sample number: 5 groups) of following standard evaluation vibrating reed this moment.
(zero) in 100 hours import continuously, has not occur vibrating reed be full of cracks or damaged more than 4 groups
(△) more than 10 hours but in the less than 100 hours, have 2 groups of above vibrating reeds be full of cracks or damaged to occur
(*) has 1 group of above vibrating reed be full of cracks or damaged to occur in less than 10 hours
In addition, in embodiment 3～5 and comparative example 1,2, under the EIA of white noise pattern, change input load with 0.3W (1.55V)～0.8W (2.53V) every 0.1W, obtain and make that whole 5 groups of vibrating reeds all do not occur chapping or damaged maximum input level (W) in 100 hours continuous input.In addition, also mark the result who estimates by following standard.
(zero) maximum input level is more than 0.6W
(*) maximum input level is below 0.5W
(6) average thickness of film
With micrometer along the gained film laterally measure 20 points equally spacedly, obtain its mean value.
Embodiment 1
PPSU resin (RadelR-5000, Tg:220 ℃, non-crystalline resin that SolvayAdvanced Polymer company makes with 100 mass parts, sometimes be called for short PPSU below) as the poly biphenyl ether sulphone resin, use the single shaft extruder of the diameter 40mm of band T type mouth mould, under 370 ℃ of design temperatures, it is carried out melting mixing, carry out quenching with 190 ℃ stacks, thereby obtain the film of average thickness 35.0 μ m.Use the table 1 that the results are shown in that the gained film estimates.
Embodiment 2
Obtained the film of average thickness 35.0 μ m by the mode identical with embodiment 1, different is: the resin combination that will constitute film becomes 50 mass parts PPSU and the 50 mass parts polyether-ether-ketone resins blended resin composition of (VICTREX company, PEEK450G, Tg:143 ℃, Tm:334 ℃ is called for short PEEK below sometimes) by 100 mass parts PPSU among the embodiment 1.Use the table 1 that the results are shown in that the gained film estimates.
Comparative example 1
Obtained the film of average thickness 35.0 μ m by the mode identical with embodiment 1, different is: the resin combination that will constitute film becomes 100 mass parts polyethersulfone resins (Sumitomo Chemical (strain), SUMICAEXCEL PES4100G, Tg:223 ℃, non-crystalline resin are called for short PES below sometimes) by 100 mass parts PPSU among the embodiment 1.Use the table 1 that the results are shown in that the gained film estimates.
Table 1
Can be confirmed by table 1: the loud speaker that is formed by the film forming that contains the poly biphenyl ether sulphone resin of the present invention has good mouldability with vibrating reed, and the durability good (embodiment 1,2) during high output.Relative therewith, can confirm: the loud speaker vibrating reed that the film forming of being made by the polyethersulfone resin in the past that does not have xenyl forms, though its good forming ability, the durability not good (comparative example 1) during high output.
Embodiment 3
With the PPSU of 85 mass parts as poly biphenyl ether sulphone resin (A), with the PEEK of 15 mass parts as crystalline resin (B), use the single shaft extruder of the diameter 40mm of band T type mouth mould, under 370 ℃ of design temperatures, they are carried out melting mixing, carry out quenching with 190 ℃ stacks, thereby obtained the film of average thickness 35.0 μ m.Use the table 2 that the results are shown in that the gained film estimates.
Embodiment 4
Obtain the film of average thickness 35.0 μ m by the mode identical with embodiment 3, different is: as shown in table 2, the resin combination that constitutes film is become the blended resin composition of 70 mass parts PPSU and 30 mass parts PEEK.Use the table 2 that the results are shown in that the gained film estimates.
Embodiment 5
Obtain the film of average thickness 35.0 μ m by the mode identical with embodiment 3, different is: as shown in table 2, with (VICTREX company, PEEK-HT G22, Tg:162 ℃, Tm:378 ℃ of polyether ketone resin, sometimes be called for short PEK below) replace PEEK among the embodiment 4 as crystalline resin (B), and the design temperature during with melting mixing is changed into 390 ℃.Use the table 2 that the results are shown in that the gained film estimates.
Comparative example 2
Obtain the film of average thickness 35.0 μ m by the mode identical with embodiment 3, different is: as shown in table 2, the resin combination that constitutes film is changed into PES by the PPSU among the embodiment 4.Use the table 2 that the results are shown in that the gained film estimates.
And for the film that comparative example 1 obtains, with embodiment 3～5 the same durability evaluation of carrying out, it the results are shown in table 2.
Table 2
Can confirm by table 2: of the present invention by comprising the loud speaker vibrating reed that poly biphenyl ether sulphone resin (A) and crystalline resin (B) film forming as principal component forms, good endurance when its good forming ability and high output, and, tension fracture elongation rate of (200 ℃) is big in the processing temperature interval for it, does very well aspect deep drawing molding for example (embodiment 3～5).And the tension fracture elongation rate of film under 200 ℃ that is made of the PPSU monomer is 285.2%.Relative therewith, can confirm: film of making by the polyethersulfone resin in the past that does not have xenyl (comparative example 1) or the loud speaker vibrating reed that forms by the film that contains this resin and PEEK (comparative example 2) moulding, though its good forming ability, the durability during high output is not good.Can confirm: because PES is poorer than the compatibility of PPSU and PEEK with the compatibility of PEEK, so although mixed PEEK in comparative example 2, durability still reduces.
Industrial applicibility
Diaphragm for electro-acoustic transducer of the present invention, durable when having good mouldability and high output Property, can be used for various miniaturized electronics (for example mobile phone, PDA, notebook computer, DVD, Liquid crystal TV, digital camera, portable music player etc.) the middle loudspeaker vibrating reed that uses, and The electroacoustic transducing devices such as receiver, microphone, earphone.
Claims (12)
1. diaphragm for electro-acoustic transducer, it is formed through moulding by the film that contains poly biphenyl ether sulphone resin (A), and described poly biphenyl ether sulphone resin (A) has the repetitive of following structural formula (1) expression:
In the formula, R
1～R
4Be independently-O-,-SO
2-,-S-or C=O, but R
1～R
4In have at least one to be-SO
2-, and R
1～R
4In have at least one to be-O-; Ar
1～Ar
3Independently for having the arlydene of 6～24 carbon atoms; A and b are respectively 0 or 1.
2. diaphragm for electro-acoustic transducer, it is formed through moulding by the film that contains poly biphenyl ether sulphone resin (A) and crystalline resin (B), and described poly biphenyl ether sulphone resin (A) has the repetitive of following structural formula (1) expression:
In the formula, R
1～R
4Be independently-O-,-SO
2-,-S-or C=O, but R
1～R
4In have at least one to be-SO
2-, and R
1～R
4In have at least one to be-O-; Ar
1～Ar
3Independently for having the arlydene of 6～24 carbon atoms; A and b are respectively 0 or 1.
3. claim 1 or 2 diaphragm for electro-acoustic transducer, wherein, described diaphragm for electro-acoustic transducer is the loud speaker vibrating reed.
4. claim 2 or 3 diaphragm for electro-acoustic transducer, wherein, described crystalline resin (B) is a poly aromatic base ketone resin.
5. each diaphragm for electro-acoustic transducer in the claim 2～4, wherein, described crystalline resin (B) is the polyether-ether-ketone resin of repetitive with following structural formula (3) expression:
6. each diaphragm for electro-acoustic transducer in the claim 2～5, wherein, the mixing quality of described poly biphenyl ether sulphone resin (A) and described crystalline resin (B) is than being (A)/(B)=99～55/5～45.
7. each diaphragm for electro-acoustic transducer in the claim 1～6, wherein, described poly biphenyl ether sulphone resin (A) comprises the PPSU resin of the repetitive of (2) expression that has following structural formula:
8. each diaphragm for electro-acoustic transducer in the claim 1～7, wherein, the glass transition temperature of described poly biphenyl ether sulphone resin (A) is 180～250 ℃.
9. each diaphragm for electro-acoustic transducer in the claim 1～8, wherein, the maximum gauge of described vibrating reed is below the 25mm.
10. be used for each the film of diaphragm for electro-acoustic transducer of claim 1～9, its average thickness is 5～150 μ m.
11. be used for each the film of diaphragm for electro-acoustic transducer of claim 1～9, its tensile modulus of elasticity is for being not less than 1000MPa and less than 2500MPa.
12. the film of claim 10 or 11, its average thickness are below the 40 μ m.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP014107/2006 | 2006-01-23 | ||
| JP2006014107 | 2006-01-23 | ||
| JP291149/2006 | 2006-10-26 | ||
| JP312866/2006 | 2006-11-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101375631A true CN101375631A (en) | 2009-02-25 |
Family
ID=40448405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007800033111A Pending CN101375631A (en) | 2006-01-23 | 2007-01-19 | Diaphragm for electro-acoustic transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101375631A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102823274A (en) * | 2011-04-08 | 2012-12-12 | 吾妻化成株式会社 | Micro-speaker oscillation plate edge material, micro-speaker oscillation plate, micro-speaker, and electronic apparatus |
| CN105142895A (en) * | 2013-04-16 | 2015-12-09 | 德莎欧洲公司 | Composite for production of an acoustic membrane and acoustic membrane |
| CN109327791A (en) * | 2017-08-01 | 2019-02-12 | 大原博 | Go the manufacturing method of horn vibrating reed destaticed |
-
2007
- 2007-01-19 CN CNA2007800033111A patent/CN101375631A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102823274A (en) * | 2011-04-08 | 2012-12-12 | 吾妻化成株式会社 | Micro-speaker oscillation plate edge material, micro-speaker oscillation plate, micro-speaker, and electronic apparatus |
| CN105142895A (en) * | 2013-04-16 | 2015-12-09 | 德莎欧洲公司 | Composite for production of an acoustic membrane and acoustic membrane |
| US9827749B2 (en) | 2013-04-16 | 2017-11-28 | Tesa Se | Composite for production of an acoustic membrane and acoustic membrane |
| CN109327791A (en) * | 2017-08-01 | 2019-02-12 | 大原博 | Go the manufacturing method of horn vibrating reed destaticed |
| CN109327791B (en) * | 2017-08-01 | 2021-01-05 | 大原博 | Method for manufacturing loudspeaker vibrating piece for removing static electricity |
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Application publication date: 20090225 |