EP3231193A1 - Composite multicouche pour membranes acoustiques - Google Patents

Composite multicouche pour membranes acoustiques

Info

Publication number
EP3231193A1
EP3231193A1 EP15804082.4A EP15804082A EP3231193A1 EP 3231193 A1 EP3231193 A1 EP 3231193A1 EP 15804082 A EP15804082 A EP 15804082A EP 3231193 A1 EP3231193 A1 EP 3231193A1
Authority
EP
European Patent Office
Prior art keywords
layer
multilayer composite
composite according
cover
layers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP15804082.4A
Other languages
German (de)
English (en)
Inventor
Michael Egger
Gero Maatz
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.)
Tesa SE
Original Assignee
Tesa SE
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 Tesa SE filed Critical Tesa SE
Publication of EP3231193A1 publication Critical patent/EP3231193A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/286—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polysulphones; polysulfides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/288—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyketones
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • 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
    • 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
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • 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
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10—Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/546—Flexural strength; Flexion stiffness
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/56—Damping, energy absorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/732—Dimensional properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/738—Thermoformability
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/52—Polyphenylene sulphide [PPS]
    • 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
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the invention relates to a multilayer composite comprising at least one outer polyphenylene sulfide film for use as a membrane for electroacoustic transducers.
  • micro-speakers The generation of sound in mobile phones and smartphones for the reproduction of speech, ringtones, music, etc. is done by small electro-acoustic transducers, so-called micro-speakers.
  • microspeakers are becoming ever smaller and flatter due to the design requirements for the corresponding electronic devices, but are also intended to be operated at a higher output, the temperature load on the microspeaker, and in particular its membrane, is increasing more and more.
  • the demands on the acoustic properties of the loudspeakers which are increasingly being used, for example, in smartphones for the loud playing of music and at the same time have a good sound quality, are also increasing.
  • the demands on the mechanical strength and acoustic quality of the micro speaker membrane have increased enormously in recent years.
  • a loudspeaker diaphragm should generally be stiff and light on the one hand in order to produce a high sound pressure and to cover a wide frequency range, but on the other hand be well damped at the same time to show the smoothest possible frequency response. Since the properties stiff, light and well damped give a constructive contradiction and not all can be fulfilled simultaneously (the higher the stiffness, the lower the damping and vice versa) In general, compromises are made in terms of stiffness and damping of the membrane material in each membrane or rigid materials combined with good damping materials. Therefore, multi-layer composites (in particular multi-layer laminates) are often used, which are then formed into the membrane. The multi-layer composites usually comprise the membrane stiffening or stabilizing layers and damping layers. The rigid films used in today's multi-layer composites themselves contribute very little to the damping.
  • US Pat. No. 7,726,441 B describes a membrane composed of a multilayer composite of two rigid polymer films and a damping adhesive layer lying between these films.
  • polyphenylene sulfide plastics are known in the prior art (for polyphenylene sulfide, the term PPS is also common and is used in this document).
  • PPS polyphenylene sulfide
  • cover layer material usually have unsatisfactory acoustic distortions, so that there is aural impairment of the acoustic signals.
  • total harmonic distortion commonly referred to in the art as “Total Harmony Distortion” or “THD” for short Designation is therefore also used in the context of this document.
  • the THD is defined as the ratio of the summed powers Ph of all harmonics to the power of the fundamental vibration Pi and is usually given as a percentage:
  • THD [%] (P h / Pi) * 100 Plastics used for the realization of optimized acoustic properties of loudspeaker membranes as cover sheet material, such as polyetherimide (PEI), polyarylate (PAR) or polyetheretherketone (PEEK), are considerably more expensive than PPS.
  • PEI polyetherimide
  • PAR polyarylate
  • PEEK polyetheretherketone
  • PPS preparation of PPS, even for such films as are used for membranes of the aforementioned type, is usually carried out by polycondensation of phenylenedihalides, in particular dichlorobenzene, and sodium sulfide in a high-boiling, dipolar aprotic solvent such as N-methylpyrrolidone.
  • phenylenedihalides in particular dichlorobenzene
  • sodium sulfide in a high-boiling, dipolar aprotic solvent such as N-methylpyrrolidone.
  • EP 0737705 A An alternative method is shown in EP 0737705 A, in which the preparation of the polymer is carried out from a prepolymer having halogen end groups.
  • halogen-containing (by-products) The manufacturing process requires that a relatively high proportion of halogen-containing (by-products) remain, which remains in the polymer in considerable quantities, as a result of which commercially available polyphenylene sulfide films have a relatively high content of halogen, which is quantitatively determined by conventional analysis methods This is usually chlorine.
  • halogen contents of more than 600 ppm, generally even more than 900 ppm.
  • One ppm corresponds to one milligram of the halogen per kilogram of the analyzed PPS film material as used.
  • the object of the invention was to provide composite film systems for the production of loudspeaker membranes (acoustic membranes), which are inexpensive and therefore economically interesting, but in which the acoustic membranes produced therefrom have improved acoustic properties compared to commercially available PPS films ,
  • the membranes should not lose their good properties in terms of high flexural stiffness, low density and high internal damping.
  • the object is achieved if, as material for the cover films of such membranes, although PPS continues to be used, but here selects a PPS having a total halogen content of not more than 550 ppm.
  • PPS a PPS having a total halogen content of not more than 550 ppm.
  • the invention relates to a multilayer composite for use as or for producing a membrane for electroacoustic transducers, comprising at least a first and a second outer layer (hereinafter referred to as cover layer), optionally a damping layer disposed between these cover layers, wherein at least one of Cover layers (“first cover layer”) consists of a polyphenylene sulfide plastic, and wherein the halogen content of the polyphenylene sulfide plastic (“PPS plastic”) does not exceed 550 ppm.
  • first cover layer consists of a polyphenylene sulfide plastic, and wherein the halogen content of the polyphenylene sulfide plastic (“PPS plastic”) does not exceed 550 ppm.
  • the multilayer composite may be a two-layer composite (excluding cover layers), it may be a three-layer composite (in particular cover layer damping layer cover layer), or it may comprise more than three layers, wherein advantageously at least one of the layers located between the cover layers is a cushioning layer.
  • the at least one damping layer in a three-layer or multi-layer composite is particularly advantageously adhesive layers, in particular PSA layers.
  • the first cover layer has a thickness of 1 to 50 ⁇ , very preferably from 1 to 5 ⁇ .
  • Suitable films for use as a second cover layer are, for example, films of polyetheretherketone (PEEK), commercial polyphenylene sulphide (PPS), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyarylate (PAR), polyimide (PI), polyetherimide ( PEI), Polyphenylsulfone (PPSU), Polyethersulfone (PES), Polysulfone (PSU) or Thermoplastic Polyurethane (TPU)
  • PEEK polyetheretherketone
  • PPS polyethylene naphthalate
  • PET polyethylene terephthalate
  • PBT polybutylene terephthalate
  • PAR polyarylate
  • PI polyimide
  • PEI polyetherimide
  • PEI Polyphenylsulfone
  • PES Polyethersulfone
  • PSU Polysulfone
  • TPU Thermoplastic Polyurethane
  • the second cover layer is particularly advantageous according to the invention to also produce the second cover layer from low-halogen PPS, so that both cover layers of the multi-layer composite consist of polyphenylene sulfide plastic whose halogen content does not exceed 550 ppm in each case.
  • the second cover layer has a thickness of 1 to 50 ⁇ , preferably from 1 to 5 ⁇ on.
  • both cover layers are made of the identical low-halogen PPS plastic, and / or the thicknesses of both cover layers are the same, so that in particular a symmetrical - or at least symmetrical with respect to the outer cover layers - multi-layer composite is present.
  • the multilayer composite of the invention consists of two laminated plastic films, of which at least one of the films - optionally also both films - consists of polyphenylene sulfide plastic whose halogen content does not exceed 550 ppm.
  • Such two-sheet systems can be used particularly well for membranes when the two-layer composite has sufficient damping properties without additional damping layer and / or the requirements for the damping in the application are low.
  • one of the films can be softened and / or melted in order to improve the adhesion to the other film.
  • a film of thermoplastic polyurethane is particularly advantageous.
  • a particularly advantageous embodiment of a two-layer composite is therefore one comprising a TPU film and a film of halogen-reduced PPS.
  • the membrane should be well damped to show the smoothest possible frequency response.
  • a damping layer which may be constructed in one layer or in turn multi-layered.
  • the damping layer therefore comprises a single-layer or multi-layer double-sided adhesive tape, in particular pressure-sensitive adhesive tape;
  • the damping layer is formed by a single-layer or multilayer double-sided adhesive tape, in particular pressure-sensitive adhesive tape.
  • Pressure-sensitive adhesive tape in addition to its damping effect, is able to cause the cohesion of the layers in the composite due to its (self) adhesive properties.
  • the damping layer itself is single-layered, so that the multi-layer composite is a three-layer composite.
  • the damping layer is then preferably a layer of a pressure-sensitive adhesive.
  • the multi-layer composite has a symmetrical three-layer structure of the kind of topcoat pressure-sensitive adhesive topcoat in which the outer cover layers are identical in chemical composition and thickness.
  • the layer thickness of the (adhesive) adhesive layer in three-layer composites is advantageously 2 ⁇ m to 100 ⁇ m, preferably 5 ⁇ m to 50 ⁇ m, particularly preferably 10 ⁇ m to 30 ⁇ m.
  • a further variant of the invention is represented by a - five-layer structure - symmetrical or asymmetrical, wherein the cover layer has an inner support or stabilization layer, for example of a film of polyetheretherketone (PEEK), commercial polyphenylene sulfide (PPS), polyethylene naphthalate (PEN), Polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyarylate (PAR), polyimide (PI), polyetherimide (PEI), polyphenylsulfone (PPSU), polyethersulfone (PES), polysulfone (PSU) or thermoplastic polyurethane (TPU), or which are particularly preferred also formed from a film of a low halogenated polyphenylene sulfide (PPS) having a halogen content of less than 550 ppm.
  • PEEK polyetheretherketone
  • PPS polyetheretherketone
  • PEN polyethylene naphthalate
  • PET Polyethylene
  • both adhesive (adhesive) layers are chemically identical and / or the same thickness.
  • the (adhesive) adhesive layers can also be selected differently with regard to their chemical nature and / or their thickness.
  • the thickness of the inner carrier or stabilizing layer is preferably 1 to 50 ⁇ m, preferably 1 to 30 ⁇ m, particularly preferably 1 to 5 ⁇ m.
  • the thicknesses of the (adhesive) adhesive layer layers are preferably 1 to 100 ⁇ , preferably 1 to 50 ⁇ , particularly preferably 2 to 40 ⁇ .
  • pressure-sensitive adhesives also referred to as self-adhesives or PSA from English: "pressure sensitive adhesives”
  • PSA pressure sensitive adhesives
  • those polymeric compositions are referred to - optionally by suitable addition with other components, such as adhesive resins - at the application temperature (unless otherwise defined, in Room temperature) are permanently tacky and permanently tacky and adhere to a variety of surfaces on contact, in particular adhere immediately (a so-called “tack” [stickiness or Anutzklebrtechnik] have). They are able, even at the application temperature without activation by solvents or by heat - but usually by the influence of a more or less high pressure - sufficient to wet a substrate to be bonded so that between the mass and the substrate for the adhesion can form sufficient interactions. Factors influencing this process include pressure and contact time.
  • the special properties of the PSAs are due in particular to their viscoelastic properties.
  • acrylate PSAs are used for the adhesive layers.
  • These are adhesives whose polymer base are polymers of acrylic monomers - these are in particular acrylic and methacrylic acid, the esters of the aforementioned acids and the copolymerizable further derivatives of the aforementioned acids understood -, the acrylic monomers - optionally together with other comonomers - in the polymerization at least be used in an amount that the properties of the adhesive are thereby determined significantly.
  • pressure-sensitive adhesives having an acrylic monomer content in the polymerization of at least 50% by weight, of at least 80% by weight or of 100% by weight (pure acrylate systems) can be used.
  • adhesives which are familiar to the person skilled in the art, in particular pressure-sensitive adhesives, are likewise possible and can be used in the context of the invention, with particular preference being given to those which have good adhesion to PPS and, moreover, have good damping properties.
  • silicone adhesives and / or polyurethane adhesives and / or rubber adhesives in particular silicone pressure-sensitive adhesives, polyurethane pressure-sensitive adhesives or rubber pressure-sensitive adhesives, can also be used in particular.
  • the PSA is applied either directly to one of the two outer layers in the desired layer thickness using the application method familiar to those skilled in the art, or indirectly by coating a temporary transfer support such as siliconized paper or siliconized film, laminating with the first of the two film layers and masking the temporary transfer support.
  • the second of the two film layers can be fed directly to the pressure-sensitive adhesive side of the one-sided laminated composite.
  • laminating devices that connect the webs of material between rubber cylinders or a steel and a rubber cylinder with variably adjustable contact pressure continuously.
  • membranes for electroacoustic transducers in particular loudspeaker membranes
  • embossing or thermoforming of a multilayer composite according to the invention whereby this composite is brought into a specific three-dimensional form.
  • the multi-layer composite is heated, for example in a thermoform and pressed by applying pressure and / or vacuum in the form of the finished membrane.
  • the multilayer composites according to the invention can be used excellently in a process for the production of membranes for electroacoustic transducers, wherein they are subjected to the process of multicavity thermoforming.
  • the multilayer laminate is placed on the heatable thermoforming, which contains recesses with the negative impression of the membrane to be formed.
  • the multi-layer laminate is e.g. heated by IR radiation and thereby softened and then pressed from above with compressed air into the recesses.
  • the softened multi-layer laminate can also be pressed into the molds with a stamp made of silicone or foamed silicone.
  • the halogen content of a halogen-reduced PPS film was 532 ppm.
  • three-layer composites each consisted of a 4 ⁇ m thick PPS film, each of a 10 ⁇ m acrylate or silicone damping layer (each standard pressure-sensitive adhesive, identical in each case in Example 1 and Comparative Example 1 and in Example 2 and Comparative Example) 2) and 4 ⁇ thick PPS film produced, wherein for the inventive examples, halogen-reduced PPS films and for comparative experiments standard PPS films were used (see Table 1).
  • the resonant frequency of both loudspeakers is 450 Hz.
  • the THD curves of the loudspeakers with the multi-layer composite diaphragms made of halogen-reduced PPS foil was between 0 and 0 for the composites with acrylate damping layer as well as for the composites with silicone damping layer. 1 and 10 kHz below the THD curves of the speakers with the membranes made of commercially available PPS film.
  • Table 1 shows examples of THD values at frequencies below the resonant frequency. Table 1 . Results of the THD determination.

Abstract

L'invention concerne un composite multicouche destiné à être utilisé comme membrane pour transducteur électroacoustique. Le composite comprend au moins une première et une seconde couche extérieure (couche de recouvrement). Au moins une des couches de recouvrement (« première couche de recouvrement ») est constituée d'un matériau plastique à base de polysulfure de phénylène. L'invention est caractérisée en ce que la teneur en halogène du matériau plastique à base de polysulfure de phénylène (« matériau plastique PPS ») ne dépasse pas 550 ppm.
EP15804082.4A 2014-12-11 2015-11-17 Composite multicouche pour membranes acoustiques Pending EP3231193A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014225579.1A DE102014225579A1 (de) 2014-12-11 2014-12-11 Mehrschicht-Verbund für akustische Membranen
PCT/EP2015/076817 WO2016091542A1 (fr) 2014-12-11 2015-11-17 Composite multicouche pour membranes acoustiques

Publications (1)

Publication Number Publication Date
EP3231193A1 true EP3231193A1 (fr) 2017-10-18

Family

ID=54771077

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15804082.4A Pending EP3231193A1 (fr) 2014-12-11 2015-11-17 Composite multicouche pour membranes acoustiques

Country Status (8)

Country Link
US (1) US10397705B2 (fr)
EP (1) EP3231193A1 (fr)
JP (1) JP6506843B2 (fr)
KR (1) KR20170094304A (fr)
CN (1) CN107211217A (fr)
DE (1) DE102014225579A1 (fr)
TW (1) TW201625417A (fr)
WO (1) WO2016091542A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210281962A1 (en) 2016-07-06 2021-09-09 Isovolta Ag Composite material for producing an acoustic membrane
DE102017202622A1 (de) * 2017-02-17 2018-08-23 Tesa Se Membran für Mikrolautsprecher
CN109218924A (zh) * 2018-08-20 2019-01-15 歌尔股份有限公司 用于发声装置的振膜、发声装置及其组装方法
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
CN111849103B (zh) * 2019-04-24 2021-11-02 歌尔股份有限公司 一种用于微型发声装置的振膜和微型发声装置

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02504211A (ja) * 1987-07-03 1990-11-29 エー　ヴエー　デー　エレクトロニク‐ヴエルケ　ドイチユラント　ゲゼルシヤフト　ミツト　ベシユレンクテル　ハフツング ラウドスピーカー用のダイヤフラム
US4910294A (en) 1988-06-20 1990-03-20 Idemitsu Petrochemical Company Limited Two-stage process for production of polyarylene sulfides with lithium compound
DE19513479A1 (de) 1995-04-13 1996-10-17 Hoechst Ag Verfahren zur Herstellung von Polyarylensulfid
JP2006295245A (ja) 2005-04-05 2006-10-26 Sony Corp 音響振動板
US7750111B2 (en) * 2005-09-22 2010-07-06 Toray Industries, Inc. Polyarylene sulfide and its production method
JP2010070656A (ja) 2008-09-19 2010-04-02 Toray Ind Inc ポリフェニレンサルファイド樹脂組成物およびそれからなる成形品
US8189851B2 (en) 2009-03-06 2012-05-29 Emo Labs, Inc. Optically clear diaphragm for an acoustic transducer and method for making same
WO2013043565A1 (fr) 2011-09-20 2013-03-28 Ticona Llc Alliage polysulfure d'arylène/polymère cristal liquide et compositions le contenant
CN103843365B (zh) * 2011-09-30 2016-08-17 富士胶片株式会社 电声转换膜、柔性显示器、声带麦克风以及乐器传感器
DE102012208477A1 (de) 2012-05-21 2013-11-21 Tesa Se Asymmetrische Mehrschichtmembran für elektroakustische Wandler
US20140178662A1 (en) * 2012-12-20 2014-06-26 Ticona Llc Multilayer Polyarylene Sulfide Composite
DE102013206812A1 (de) 2013-04-16 2014-11-06 Tesa Se Verbund zur Herstellung einer akustischen Membran und akustische Membran
CN203883985U (zh) * 2014-05-26 2014-10-15 歌尔声学股份有限公司 扬声器振膜

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016091542A1 *

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JP6506843B2 (ja) 2019-04-24
TW201625417A (zh) 2016-07-16
DE102014225579A1 (de) 2016-06-16
WO2016091542A1 (fr) 2016-06-16
US20180270577A1 (en) 2018-09-20
JP2018505585A (ja) 2018-02-22
KR20170094304A (ko) 2017-08-17
CN107211217A (zh) 2017-09-26
US10397705B2 (en) 2019-08-27

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