[go: up one dir, main page]

EP1410681B1 - Fabrication de membranes non plates pour convertisseurs electroacoustiques - Google Patents

Fabrication de membranes non plates pour convertisseurs electroacoustiques Download PDF

Info

Publication number
EP1410681B1
EP1410681B1 EP02791447A EP02791447A EP1410681B1 EP 1410681 B1 EP1410681 B1 EP 1410681B1 EP 02791447 A EP02791447 A EP 02791447A EP 02791447 A EP02791447 A EP 02791447A EP 1410681 B1 EP1410681 B1 EP 1410681B1
Authority
EP
European Patent Office
Prior art keywords
range
temperature
core layer
mpa
meth
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP02791447A
Other languages
German (de)
English (en)
Other versions
EP1410681A1 (fr
Inventor
Horst Greb
Roland Geduldig
Michael Deitrich
Torsten Jahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Roehm GmbH Darmstadt
Original Assignee
Roehm GmbH Darmstadt
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Roehm GmbH Darmstadt filed Critical Roehm GmbH Darmstadt
Publication of EP1410681A1 publication Critical patent/EP1410681A1/fr
Application granted granted Critical
Publication of EP1410681B1 publication Critical patent/EP1410681B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49005—Acoustic transducer

Definitions

  • the present invention relates to methods for producing non-flat Membranes for electroacoustic transducers containing a poly (meth) acrylimide foam having Kemtik and having at least one outer layer, and Membranes for electroacoustic transducers and is based on DE-A-19 925 787.
  • Electro-acoustic transducers or speakers are devices that are capable are electrical alternating currents in the audio frequency range in audible sound convert. These devices are well known in the art and For example, in US-PS 4,928,312, DE-OS 30 36 876 and DE-OS 22 25 710 described.
  • EP-A-0 087 177 describes a membrane comprising a layer of poly (meth) acrylimide foam.
  • the poly (meth) acrylimide-containing layer provided with a cover layer can be.
  • This topcoat is made by adhesive at room temperature applied to ensure that the density of the core layer as possible remains low.
  • the quotient of density and Young's modulus should be as low as possible, since this factor is a measure of the quality the membrane is.
  • a first approach to solving these problems discloses the document DE 199 25 787. It describes a method for producing a membrane for electroacoustic transducers comprising a poly (meth) acrylimide foam Core layer and at least one cover layer, such as films, the Polypropylene, polyester, polyamide, polyurethane, polyvinyl chloride, Polymethyl (meth) acrylate and / or metal, such as aluminum, contain, mats or webs, the glass fibers, carbon fibers and / or Aramid fibers comprises, wherein the cover layer with the Core layer using a pressure of ⁇ 0.4 MPa and a Temperature ⁇ 160 ° C laminated, at least the same with the top layer in Contact side of the core layer compacted and then the obtained composite to a temperature below 80 ° C before cooling lowered the pressure to ambient pressure.
  • the procedure is as One-step method feasible.
  • the membranes produced in this way show excellent strength, in particular the outer layers a have very high peel strength.
  • non-flat membranes for electroacoustic transducers that use a poly (meth) acrylimide foam comprising core layer and at least one cover layer, in which reduces or eliminates the abovementioned topcoat release problems become.
  • Preferred embodiments of the The method according to the invention are dependent on the dependent on claim 1 Claims under protection.
  • the independent claim of Product category protects the non-flat membrane according to the invention for electroacoustic transducers comprising a poly (meth) acrylimide foam Core layer and at least one cover layer.
  • non-flat membrane for electroacoustic transducers comprising a poly (meth) acrylimide foam Core layer and at least one cover layer is in the Usage claim specified.
  • the process according to the invention serves to produce non-flat membranes for electroacoustic transducers.
  • the membranes are preferably curved and expediently in the form of a hollow body.
  • the process for producing conical membranes, especially conical truncated membranes proven especially.
  • the top layer is first with the core layer at a temperature ⁇ 160 ° C, preferably in a range of 165-230 ° C, especially in the range of 180-195 ° C, laminated.
  • the lamination is preferably carried out by gently compressing the Composite, but the applied pressure should be less than 0.3 MPa. Conveniently, the applied pressure is 0.05 to 0.25 MPa.
  • the duration the lamination step u. a. from the curing conditions of the adhesive It is preferably 0.01 to 10 minutes, especially 0.1 to 5 Minutes.
  • the resulting composite is at a pressure ⁇ 0.3 MPa, preferably in the range of 1-16 MPa, and a temperature ⁇ 160 ° C, preferably in the range of 175-200 ° C, conveniently in the range of 180-200 ° C, especially in the range of 180-195 ° C, using a cold mold, which has a temperature less than 100 ° C, reshaped and at least the side of the cover layer in contact with the Core layer compacted.
  • Thermoforming can be achieved, which, for example, in Dubbel, Paperback for Mechanical Engineering, 19th Edition, edited by W. Beitz and K.-H. Grote, Springer 1997, E77.
  • thermoforming is the thermoplastic semi-finished product (composite of a)) quickly and evenly on the Temperature of optimal thermoelastic behavior heated and by means of Vacuum, compressed air or mechanical forces reshaped and by cooling fixed.
  • the pressing process optionally cooled spacers, so-called attacks used.
  • Preferred embodiments of the membrane according to the invention have two Cover layers, which form a sandwich structure with the core layer.
  • the Production of such a membrane will now be described with reference to the following figures shown.
  • FIG. 1 to 4 show the preparation of inventive membrane.
  • the press is moved to contact, which is shown in Fig. 2.
  • the temperature of the press is raised to lamination temperature.
  • the Lamination temperature is at least 160 ° C, it is preferably in a range of 165-230 ° C, most preferably in the range of 180- 195 ° C. If the temperature is lower than 160 ° C, it may damage the Pore structure of the poly (meth) acrylimide hard foam come.
  • the pressure used for this purpose is less than 0.3 MPa, preferably 0.01 to ⁇ 0.3 MPa, in particular 0.05 to 0.25 MPa.
  • the laminated composite After a first residence time t 1 , preferably 0.01 to 10 minutes at a temperature ⁇ 160 ° C, preferably in the range of 175-200 ° C, suitably in the range of 180-200 ° C, in particular in the range of 180 to 195 ° C, the laminated composite introduced into a second press, the one at less than 100 ° C, preferably at less than 90 ° C, advantageously less than 80 ° C, in particular less than 70 ° C, cooled positive (form, 4) and one on smaller 100 ° C, preferably at less than 90 ° C, suitably less than 80 ° C, in particular less than 70 ° C, cooled negative (counter-mold, 5) (see Fig. 3).
  • the press is fed to the optionally also cooled stops (6), as shown in Fig. 4.
  • the core layer is compressed to the intended degree of compaction.
  • This is indicated by the reference numeral 7
  • the pressure required for this is generally at least 0.3 MPa. But it can also be a higher pressure to be selected, it is preferably in the range of 1 to 16 MPa.
  • the residence time in the second press is generally very short. It is preferably 5 to 300 seconds, in particular 10 to 30 seconds.
  • the core layer is preferably on a thickness less than 90%, preferably less than 80% based on the original thickness, compacted. If the compression is smaller, sticks in many Do not lamination without the use of special adhesives enough. Compression means that the pores of the core layer are reduced in size become. As a result, the strength of the membrane is substantially increased, without This makes their suitability for use as an electroacoustic transducer essential will be affected.
  • the core layers relevant to the process of the invention have Poly (meth) acrylimide foam on.
  • the notation comprises (meth) acrylic Methacrylic, acrylic and mixtures of both.
  • Poly (meth) acrylimide foams for core layers of membranes contain repeating units which can be represented by formula (I) wherein R 1 and R 2 are identical or different hydrogen or a methyl group and R 3 is hydrogen or an alkyl or aryl radical containing up to 20 carbon atoms, hydrogen being preferred.
  • units of structure (I) constitute more than 30% by weight, especially preferably more than 50% by weight and very particularly preferably more than 80 % By weight of the poly (meth) acrylimide foam.
  • the units of the structural formula (I), inter alia, when heated to 150 to 250 ° C from adjacent units of (meth) acrylic acid and the (Meth) acrylonitrile by a cyclizing isomerization reaction form see. DE-C 18 17156, DE-C 27 26 259, EP-B 146 892.
  • a cyclizing isomerization reaction form see. DE-C 18 17156, DE-C 27 26 259, EP-B 146 892.
  • a Free radical initiator at low temperatures, e.g. B. 30 to 60 ° C with After heating to 60 to 120 ° C generated, then by heating to about 180 to 250 ° C is foamed by a contained propellant (see EP-B 356 714).
  • a copolymer which (meth) acrylic acid and (meth) acrylonitrile preferably in a Molar ratio between 2: 3 and 3: 2.
  • these copolymers may contain other comonomers, such as for example, esters of acrylic or methacrylic acid, in particular with low Alcohols with 1-4 C atoms, styrene, maleic acid or their anhydride, Itaconic acid or its anhydride, vinylpyrrolidone, vinyl chloride or Vinylidene chloride can be used.
  • the proportion of comonomers who are not or very difficult to cyclize, should be 30 wt .-%, preferably 10 wt .-% do not exceed.
  • crosslinkers such as B. allyl acrylate, allyl methacrylate, ethylene glycol diacrylate or - dimethacrylate or polyvalent metal salts of acrylic or methacrylic acid, such as Magnesium methacrylate can be used to advantage.
  • the proportions can z. B. 0.005 to 5 wt .-% amount.
  • the precursors may contain conventional additives.
  • additives include antistatic agents, antioxidants, mold release agents, Flame retardants, lubricants, dyes, flow improvers, Fillers, light stabilizers and organic phosphorus compounds, such as Phosphites or phosphonates, pigments, weathering inhibitors and Plasticizers.
  • azo compounds such as Azodiisobutyronitrile
  • peroxides such as dibenzoyl or Dilauroyl peroxide
  • other peroxide compounds such as t-butyl peroctanoate or perketals
  • redox initiators cf. for example, H. Rauch-Puntigam, Th. Völker, acrylic and Methacrylic compounds, Springer, Heidelberg, 1967 or Kirk-Othmer, Encyclopedia of Chemical Technology, Vol. 1, pp. 286 et seq., John Wiley & Sons, New York, 1978).
  • the polymerization initiators are preferred in amounts from 0.01 to 0.3 wt .-% based on the starting materials used. Cheap can it may be, polymerization initiators with different Combining decay properties with respect to time and temperature. Well is suitable for.
  • amide structure such as urea, monomethyl or N, N'-dimethylurea, Formamide or monomethylformamide, put in the decomposition of ammonia or Amines free, which may contribute to the formation of additional imide groups.
  • nitrogen-free propellants such as formic acid, water or monohydric aliphatic alcohols having 3 to 8 C atoms, such as propanol, butanol, Isobutanol, pentanols or hexanol can be used.
  • Propellants are in Reaction batch usually in amounts of about 0.5 to 8 wt .-% based on used the monomers used.
  • Polymethacrylimides with high heat resistance can further by reacting polymethyl methacrylate or its copolymers with primary amines are obtained, which are also used according to the invention. Representing the multitude of examples of these polymer analogues Imidization may be mentioned: US 4,246,374, EP 216 505 A2, EP 860 821.
  • High Heat resistance can be either by the use of Arylamines (JP 05222119 A2) or by the use of special Reach comonomers (EP 561 230 A2, EP 577 002 A1). All these reactions However, they do not give foams, but rather solid polymers which are used to obtain a Foam must be foamed in a separate second step. Also For this purpose, techniques are known in the art.
  • Poly (meth) acrylimide rigid foams can also be obtained commercially , such as ®Rohacell from Röhm GmbH, which is available in various Densities and sizes available.
  • the density of the poly (meth) acrylimide foam before densification is preferably in the range from 20 kg / m 3 to 180 kg / m 3 , particularly preferably in the range from 30 to 110 kg / m 3 .
  • the core layer may additionally have further layers.
  • the thickness of the core layer is in the range of 0.8 to 100 mm, in particular in the range of 1 to 15 and most preferably in the range from 1 to 8 mm.
  • any known planar structure can be used, the at the processing parameters necessary for the production of the membrane, such as Pressure and temperature, stable and at a temperature ⁇ 160 ° C, preferably 175-200 ° C, suitably in the range of 180-200 ° C, in particular in Range of 180-195 ° C, is deformable.
  • the term is used here "deformable planar structure" in the context of the present invention by mechanical forces plastically deformable flat structures.
  • the two-dimensional structures are particularly special which has been found to be advantageous at a temperature ⁇ 160 ° C, preferably 175-200 ° C, suitably in the range of 180-200 ° C, in particular in the range of 180-195 ° C, using a pressure ⁇ 0.3 MPa, especially in the range from 1 to 16 MPa formable, suitably thermoformable, are.
  • inventively preferred planar structures include u.a.
  • films which at a temperature ⁇ 160 ° C, preferably 175-200 ° C, suitably in the range of 180-200 ° C, especially in the range from 180-195 ° C, formable polymers, suitably formable Polyesters and polyamides, in particular polyamides.
  • the polymers have preferably a glass transition temperature of less than 160 ° C and a melting temperature greater than 160 ° C, preferably greater than 170 ° C, suitably greater than 180 ° C, on. In this case, both the glass transition temperature and the melting temperature determined by DSC using a heating rate of 20 ° C / min. Also Mixtures of several polymers and / or the use of copolymers is conceivable.
  • the weight fraction of or deformable polymers based on the total weight of the film preferably at least 50% by weight, suitably at least 65% by weight, especially preferably at least 80 wt .-%, in particular at least 95 wt .-%.
  • mats or webs can be used, the Include glass fibers, carbon fibers and / or aramid fibers, provided that these tracks or mats at a temperature ⁇ 160 ° C, preferably 175-200 ° C, suitably in the range of 180-200 ° C, in particular in the range of 180-195 ° C, are deformable.
  • a cover layer and webs can be used be, which have a multilayer structure.
  • curable plastics prepreg sheets usually Glass fiber mats or glass filament fabrics, which by hot pressing to form parts or semi-finished can be processed.
  • the hardenable plastic preferably one at a temperature ⁇ 160 ° C, preferably 175-200 ° C, suitably in the range of 180-200 ° C, in particular in the range of 180-195 ° C, formable polymer, preferably a polyester or a polyamide, in particular a polyamide.
  • the polymer preferably has a glass transition temperature less than 160 ° C and a melting temperature greater than 160 ° C, preferably greater 170 ° C, suitably greater than 180 ° C, more preferably greater than or equal 190 ° C, in particular in the range of 190-230 ° C.
  • a glass transition temperature less than 160 ° C and a melting temperature greater than 160 ° C, preferably greater 170 ° C, suitably greater than 180 ° C, more preferably greater than or equal 190 ° C, in particular in the range of 190-230 ° C.
  • the thickness of the cover layer is in the range of 0.05 to 10 mm, preferably in the range of 0.1 to 5 mm and most preferably in the range from 0.5 to 2 mm.
  • an adhesive can also be used. Depending on Material of the cover layer, this is not necessary.
  • the membranes prepared according to the method of the invention have excellent mechanical properties.
  • the modulus of elasticity according to DIN 53 423 is greater than or equal to 50 MPa, in particular greater than 60 MPa.
  • the flexural strength according to DIN 53423 with values of 2 MPa or more, especially greater than 2.3 MPa surprisingly high.
  • the Bending stiffness according to DIN 53 293 has values of 8 MPa or more, especially greater than 10 MPa.
  • non-flat membranes Possible fields of use of the non-flat membranes according to the invention are immediately obvious to the person skilled in the art. They are preferably as Membranes for electroacoustic transducers, in particular as Speaker diaphragms, used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Multimedia (AREA)
  • Laminated Bodies (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Claims (14)

  1. Procédé de fabrication d'une membrane non plate pour convertisseurs électroacoustiques qui présente une couche centrale contenant de la mousse de poly(méth)acrylimide et au moins une couche de revêtement,
    caractérisé en ce qu'
    a) on lamine la couche de revêtement avec la couche centrale en appliquant une pression < 0,3 MPa et une température ≥ 160 °C, puis
    b) on forme le composite obtenu à une pression ≥ 0,3 MPa et une température ≥ 160 °C en utilisant un moule froid, qui présente une température inférieure à 100 °C, et on compacte en même temps la face de la couche centrale se trouvant en contact avec la couche de revêtement.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    pour le laminage on chauffe au moins la face de la couche centrale se trouvant en contact avec la couche de revêtement à une température de l'ordre de 165 à 230 °C, en particulier de l'ordre de 180 à 195 °C.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    pour le formage on programme une température de l'ordre de 175 à 200 °C, de préférence de l'ordre de 180 à 200 °C, en particulier de l'ordre de 180 à 195 °C.
  4. Procédé selon l'une quelconque ou plusieurs des revendications précédentes,
    caractérisé en ce que
    pour le formage on utilise une pression de l'ordre de 1 à 16 MPa.
  5. Procédé selon l'une quelconque ou plusieurs des revendications précédentes,
    caractérisé en ce qu'
    on compacte la couche centrale à une épaisseur inférieure à 90 % de l'épaisseur initiale.
  6. Procédé selon l'une quelconque ou plusieurs des revendications précédentes,
    caractérisé en ce qu'
    on utilise une couche centrale constituée de mousse de poly(méth)acrylimide.
  7. Procédé selon l'une quelconque ou plusieurs des revendications précédentes,
    caractérisé en ce que
    comme couche de revêtement on utilise un produit plat qui contient un polymère thermoplastique déformable à une température ≥ 160 °C, de préférence entre 175 et 200 °C, de manière appropriée de l'ordre de 180 à 200 °C, en particulier de l'ordre de 180 à 195 °C.
  8. Procédé selon l'une quelconque ou plusieurs des revendications précédentes,
    caractérisé en ce que
    comme couche de revêtement on utilise un demi-produit plat qui contient du polyamide 12.
  9. Procédé selon l'une quelconque ou plusieurs des revendications précédentes,
    caractérisé en ce qu'
    on utilise deux couches de revêtement pour obtenir une structure en sandwich.
  10. Membrane non plate pour convertisseurs électroacoustiques qui comprend une couche centrale contenant de la mousse de poly(méth)acrylimide et au moins une couche de revêtement,
    caractérisée en ce que
    la couche de revêtement est un produit plat qui contient un polymère thermoplastique déformable à une température ≥ 160 °C, de préférence entre 175 et 200 °C, de manière appropriée de l'ordre de 180 à 200 °C, en particulier de l'ordre de 180 à 195 °C.
  11. Membrane non plate selon la revendication 10,
    caractérisée en ce que
    la résistance au décollage est ≥ 10 N/mm, le module d'élasticité ≥ 50 MPa et la résistance à la flexion ≥ 2 MPa.
  12. Membrane non plate selon la revendication 10 ou 11,
    caractérisée en ce que
    la membrane présente deux couches de revêtement.
  13. Membrane non plate selon la revendication 10,
    caractérisée en ce qu'
    elle présente une forme conique, de préférence tronconique.
  14. Utilisation d'une membrane non plate selon l'une quelconque ou plusieurs des revendications 10 à 13, comme convertisseur électroacoustique, de préférence comme membrane de haut-parleur.
EP02791447A 2001-07-25 2002-07-09 Fabrication de membranes non plates pour convertisseurs electroacoustiques Expired - Lifetime EP1410681B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10135414 2001-07-25
DE10135414A DE10135414C1 (de) 2001-07-25 2001-07-25 Herstellung nicht-flacher Membranen für elektroakustische Wandler
PCT/EP2002/007603 WO2003013187A1 (fr) 2001-07-25 2002-07-09 Fabrication de membranes non plates pour convertisseurs electroacoustiques

Publications (2)

Publication Number Publication Date
EP1410681A1 EP1410681A1 (fr) 2004-04-21
EP1410681B1 true EP1410681B1 (fr) 2005-03-30

Family

ID=7692512

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02791447A Expired - Lifetime EP1410681B1 (fr) 2001-07-25 2002-07-09 Fabrication de membranes non plates pour convertisseurs electroacoustiques

Country Status (10)

Country Link
US (1) US20040247152A1 (fr)
EP (1) EP1410681B1 (fr)
JP (1) JP3999198B2 (fr)
CN (1) CN100542334C (fr)
AT (1) ATE292361T1 (fr)
CA (1) CA2455619A1 (fr)
DE (2) DE10135414C1 (fr)
ES (1) ES2238624T3 (fr)
MY (1) MY131414A (fr)
WO (1) WO2003013187A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10231830A1 (de) * 2002-07-12 2004-01-22 Röhm GmbH & Co. KG Schaumstoff mit verdichteter Oberfläche
FR2853803B1 (fr) * 2003-04-09 2005-06-03 Focal Jmlab Membrane pour haut-parleur d'enceinte acoustique haute fidelite, multicouches, multimateriaux
JP4482372B2 (ja) * 2004-05-13 2010-06-16 パイオニア株式会社 電気音響変換器用振動板の製造方法
JP2006319464A (ja) * 2005-05-10 2006-11-24 Pioneer Electronic Corp スピーカー装置用振動板の製造方法
JP2007096498A (ja) 2005-09-27 2007-04-12 Pioneer Electronic Corp スピーカ用振動板及びその製造方法
DE102010028695A1 (de) * 2010-05-06 2011-11-10 Evonik Röhm Gmbh Polymethacrylimid-Schaumstoffe mit verminderter Entflammbarkeit sowie Verfahren zur Herstellung dieser
JP4939669B1 (ja) * 2010-11-30 2012-05-30 パイオニア株式会社 スピーカエッジ及びその製造方法、スピーカ
DE102012000275A1 (de) * 2012-01-10 2013-07-11 Nicolay Verwaltung Gmbh Schallwandler, insbesondere Ultraschallwandler, und Verfahren zu dessen Herstellung
FR3028704B1 (fr) * 2014-11-17 2018-03-09 Focal Jmlab Membrane de haut-parleur, et procede de fabrication d'une telle membrane
US20170034625A1 (en) * 2015-07-31 2017-02-02 Logitech Europe S.A Electronic device having a mode damped diaphragm
GB2549955A (en) 2016-05-03 2017-11-08 4A Mfg Gmbh Membrane plate structure for generating sound waves
US10034093B2 (en) * 2016-08-22 2018-07-24 4A Manufacturing Gmbh Temperature stable membrane plate structure for a loudspeaker
US10028060B2 (en) * 2016-08-22 2018-07-17 4A Manufacturing Gmbh Temperature stable membrane plate structure for a loudspeaker
TWI683583B (zh) * 2018-09-03 2020-01-21 輔仁大學學校財團法人輔仁大學 音膜結構
CN114422921A (zh) * 2022-01-07 2022-04-29 信维(深圳)声学科技有限公司 一种夹层膜片

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US533065A (en) * 1895-01-29 Baling-machine
DE2225710C3 (de) * 1971-05-28 1975-12-04 Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka Membran für elektroakustische Wandler und Verfahren zu ihrer Herstellung
US4140203A (en) * 1976-05-17 1979-02-20 Matsushita Electric Industrial Co., Ltd. Acoustic diaphragm with polyurethane elastomer coating
JPS52154623A (en) * 1976-06-18 1977-12-22 Matsushita Electric Ind Co Ltd Sound diaphragm
JPS52139425A (en) * 1976-05-18 1977-11-21 Ricoh Co Ltd Electrostatic recording apparatus
JPS5379525A (en) * 1976-12-23 1978-07-14 Sony Corp Compound diaphtagm for speakers
US4246374A (en) * 1979-04-23 1981-01-20 Rohm And Haas Company Imidized acrylic polymers
GB2062408B (en) * 1979-10-02 1984-02-22 Victor Company Of Japan Speaker
JPS57132500A (en) * 1981-02-10 1982-08-16 Sanyo Electric Co Ltd Manufacture for diaphragm plate for speaker
NL8200690A (nl) * 1982-02-22 1983-09-16 Philips Nv Luidsprekermembraan bevattende een laag van polymethacrylimideschuim.
US4673454A (en) * 1983-11-23 1987-06-16 Chinese Petroleum Corp. Process for preparing bipolar membranes
US4727117A (en) * 1985-08-27 1988-02-23 Rohm And Haas Company Imide polymers
US4928312A (en) * 1988-10-17 1990-05-22 Amel Hill Acoustic transducer
US5259036A (en) * 1991-07-22 1993-11-02 Shure Brothers, Inc. Diaphragm for dynamic microphones and methods of manufacturing the same
DE4208994A1 (de) * 1992-03-20 1993-09-23 Basf Ag Polymethacrylimide mit hoher waermeformbestaendigkeit
JPH05316591A (ja) * 1992-05-12 1993-11-26 Onkyo Corp スピーカ用エッジ及びその製造方法
DE4221712A1 (de) * 1992-07-02 1994-01-05 Basf Ag Polymethacrylimide mit hoher Wärmeformbeständigkeit
DE4321506C2 (de) * 1993-06-29 1999-07-29 Ulrich Ranke Lautsprechermembrane für einen Schallerzeuger
US6028565A (en) * 1996-11-19 2000-02-22 Norton Performance Plastics Corporation W-band and X-band radome wall
EP0860821B1 (fr) * 1997-02-24 2002-11-27 Fuji Electric Co., Ltd. Support d'enregistrement optique
US6107976A (en) * 1999-03-25 2000-08-22 Bradley B. Teel Hybrid core sandwich radome
DE19925787C1 (de) * 1999-06-05 2000-12-21 Roehm Gmbh Verfahren zur Herstellung von Membranen für elektroakustische Wandler sowie Membranen
DE19935596A1 (de) * 1999-08-02 2001-03-15 Moeller Plast Gmbh Akustisches Bauteil

Also Published As

Publication number Publication date
JP3999198B2 (ja) 2007-10-31
CN1513279A (zh) 2004-07-14
CN100542334C (zh) 2009-09-16
JP2004537243A (ja) 2004-12-09
US20040247152A1 (en) 2004-12-09
CA2455619A1 (fr) 2003-02-13
ATE292361T1 (de) 2005-04-15
DE50202642D1 (de) 2005-05-04
MY131414A (en) 2007-08-30
WO2003013187A1 (fr) 2003-02-13
DE10135414C1 (de) 2003-03-13
EP1410681A1 (fr) 2004-04-21
ES2238624T3 (es) 2005-09-01

Similar Documents

Publication Publication Date Title
EP1410681B1 (fr) Fabrication de membranes non plates pour convertisseurs electroacoustiques
EP2598304B1 (fr) Procédé de moussage dans le moule à l&#39;aide d&#39;un agent moussant et des couches de revêtement et pièce moulée en matière plastique correspondante
EP0874019B1 (fr) Procédé de préparation de mousses de polyméthacrylimide
EP2768892B1 (fr) Procédé de production de copolymères expansés à base de poly(méth)acrylimide contenant un agent adhésif
DE69612798T2 (de) Mit der papierherstellungstechnik hergestellte verpressbare folie und verfahren zum herstellen von verpressten folien mit geringen gewicht
EP1183904B1 (fr) Procede de fabrication de membranes pour transducteurs electro-acoustiques et membranes ainsi obtenues
EP1478687B1 (fr) Mousse a surface comprimee
DE69216014T2 (de) Expandierbare Polyacrylate und deren Schaumstoffe
EP2176056B1 (fr) Soudures bout à bout améliorées pour matériaux d&#39;âme
DE10059436A1 (de) Verfahren zur Herstellung von Verbundwerkstoffen mit hoher Abschälfestigkeit
DE102011002905A1 (de) Polyacrylimid-Schaumstoffe mit reduziertem Gehalt an Restmonomeren, sowie Verfahren zur Herstellung
HK1047011B (en) Method for producing membranes for electroacoustic transducers and membranes obtained by this method
HK1080099B (en) Surface-compacted foam

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

17P Request for examination filed

Effective date: 20031021

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050330

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050330

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050330

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050330

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050330

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: CH

Ref legal event code: NV

Representative=s name: BOVARD AG PATENTANWAELTE

REF Corresponds to:

Ref document number: 50202642

Country of ref document: DE

Date of ref document: 20050504

Kind code of ref document: P

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: GERMAN

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050630

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050630

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050630

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050709

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050731

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20050725

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2238624

Country of ref document: ES

Kind code of ref document: T3

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050908

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

ET Fr: translation filed
26N No opposition filed

Effective date: 20060102

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: EVONIK ROEHM GMBH

Free format text: ROEHM GMBH & CO. KG#KIRSCHENALLEE#64293 DARMSTADT (DE) -TRANSFER TO- EVONIK ROEHM GMBH#KIRSCHENALLEE#64293 DARMSTADT (DE)

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

Ref country code: FR

Ref legal event code: CJ

REG Reference to a national code

Ref country code: NL

Ref legal event code: SD

Effective date: 20100223

Ref country code: NL

Ref legal event code: TD

Effective date: 20100223

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20100726

Year of fee payment: 9

Ref country code: ES

Payment date: 20100726

Year of fee payment: 9

Ref country code: NL

Payment date: 20100714

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20100714

Year of fee payment: 9

Ref country code: DE

Payment date: 20100723

Year of fee payment: 9

Ref country code: FI

Payment date: 20100714

Year of fee payment: 9

Ref country code: FR

Payment date: 20100805

Year of fee payment: 9

Ref country code: IT

Payment date: 20100726

Year of fee payment: 9

Ref country code: SE

Payment date: 20100715

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20100722

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20100715

Year of fee payment: 9

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Owner name: EVONIK ROEHM GMBH

Free format text: EVONIK ROEHM GMBH#KIRSCHENALLEE#64293 DARMSTADT (DE) -TRANSFER TO- EVONIK ROEHM GMBH#KIRSCHENALLEE#64293 DARMSTADT (DE)

BERE Be: lapsed

Owner name: EVONIK ROHM G.M.B.H.

Effective date: 20110731

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20120201

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20110709

REG Reference to a national code

Ref country code: AT

Ref legal event code: MM01

Ref document number: 292361

Country of ref document: AT

Kind code of ref document: T

Effective date: 20110709

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20120330

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120201

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110731

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110801

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110731

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110731

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 50202642

Country of ref document: DE

Effective date: 20120201

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20120201

Ref country code: FI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110709

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110709

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110710

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20131029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20110710