EP3056024A1 - Procédé de fabrication d'une feuille destinée à une membrane de haut-parleur ou de microphone - Google Patents

Procédé de fabrication d'une feuille destinée à une membrane de haut-parleur ou de microphone

Info

Publication number
EP3056024A1
EP3056024A1 EP14783619.1A EP14783619A EP3056024A1 EP 3056024 A1 EP3056024 A1 EP 3056024A1 EP 14783619 A EP14783619 A EP 14783619A EP 3056024 A1 EP3056024 A1 EP 3056024A1
Authority
EP
European Patent Office
Prior art keywords
film
extrusion
thermoplastic elastomer
membrane
producing
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.)
Ceased
Application number
EP14783619.1A
Other languages
German (de)
English (en)
Inventor
Christian ZECHNER
Peter Pertl
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.)
Isovolta AG
Original Assignee
Isovolta AG
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 Isovolta AG filed Critical Isovolta AG
Priority to EP14783619.1A priority Critical patent/EP3056024A1/fr
Publication of EP3056024A1 publication Critical patent/EP3056024A1/fr
Ceased legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B32B27/32—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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/18—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only
    • B32B37/182—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of discrete sheets or panels only one or more of the layers being plastic
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/38—Loudspeaker cones; Acoustic diaphragms
    • 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
    • B32B2325/00—Polymers of vinyl-aromatic compounds, e.g. polystyrene
    • 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
    • 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

Definitions

  • the present invention relates to a process for producing a film for a
  • Speaker diaphragm or a microphone diaphragm Speaker diaphragm or a microphone diaphragm.
  • Electromagnetic converters are used for different types of speakers and
  • Microphones are used, especially for miniature speakers, as in
  • multifunctional multilayer films as membrane materials. These can be tailored by their structure targeted to the requirements of the acoustic system.
  • a fundamental feature of these multi-layer films is the thermoplastic matrix, which the processing!
  • a loudspeaker membrane which is constructed in three layers: on a fabric as a basis are one or two layers of a
  • thermoplastic resin From US 2012/0060997 Al a film is known, which has at least one film of a polypropylene homopolymer with a modifier. From US 4,761,451 an acoustic vibration membrane made of polypropylene and a thermoplastic styrene block copolymer is known. From EP 1 113 704 A2, in turn, a diaphragm for a loudspeaker is known, wherein the diaphragm has a foam of a base resin of an aromatic polycarbonate, to at least 50% by weight.
  • Membrane films with mechanically strong outer layers and a flexible core layer are in the range of 600 Hz to 1000 Hz, depending on the structure and design. These frequencies are located but in the use of miniature speakers, which can lead to unwanted acoustic effects.
  • silicones are also called
  • From EP 2 268 058 AI is a membrane for a micro-speaker and a
  • the membrane comprises an elastomer having a thickness of less than 0.3 mm and a Young's modulus of less than 100 MPa.
  • EP 2 268 058 AI it should be noted that a membrane made of an elastomer can be produced by injection molding and that this technique is a very stable
  • the present invention has as its first object to provide an alternative method for producing a film for a loudspeaker membrane or a microphone membrane.
  • the inventive method for producing a film for a loudspeaker membrane or a microphone membrane of a thermoplastic elastomer is characterized in that a thermoplastic elastomer is formed by extrusion into a film.
  • a preferred embodiment of the inventive method for producing an at least two-ply film is that the extrusion is carried out as co-extrusion with at least one thermoplastic elastomer.
  • the co-extrusion can be carried out with at least two mutually chemically different thermoplastic elastomers or with the thermoplastic elastomer and at least one thermoplastic material.
  • Preparation of a film which is at least two-ply is that at least one further film, optionally produced by extrusion from a thermoplastic material, is laminated to a film produced by extrusion from a thermoplastic elastomer.
  • thermoplastic elastomer SBS styrene-butadiene block copolymer
  • SEBS styrene-ethylene-butylene-styrene block copolymer
  • copolyester and / or polyamide very well, with SEBS and / or SBS are particularly preferred.
  • the extrusion or coextrusion is best carried out so that the film has a thickness between 10 ⁇ and 300 ⁇ .
  • the invention further relates to a film which is produced by the process according to the invention and is formed as a monofilm, being provided as the thermoplastic elastomer SBS and / or SEBS.
  • the present invention relates to the use of an after
  • the films of the invention have compared to a silicone film, one of the
  • Films according to the invention has comparatively low resonant frequency, a much better attenuation, whereby the fiction, contemporary films for microspeakers and microphones are far better.
  • Film materials are determined as follows, the measuring device being shown schematically in FIG. 3: A film sample strip 9, with the typical dimension 10x15 mm, is clamped on one side in the test box 11 with the aid of a tensioning device 10.
  • the sample is pneumatically generated by sinusoidal sound waves generated by a loudspeaker 12, the one
  • Figure 1 shows schematically the structure of a
  • Extruder in section with the screw 1, which is located in the cylinder 2.
  • the drive is indicated schematically at 3.
  • the reference numeral 4 stands for the hopper. 2 shows schematically the system for film extrusion with a slot die 5 for extension of the film 7, which is first drawn off via a cooling roller 6 and finally rolled up (roll 8).
  • a polymer melt extruder can be used to produce monofilms.
  • multilayer films can then be laminated.
  • extruders and multi-layer dies for the production of co-extruded
  • Multi-layer films are used.
  • the processing temperature in the extruder is in the range of 160 ° C to 250 ° C.
  • an air knife or pressure roller can be used to smooth the film.
  • the stretching of the film is preferably carried out between the nozzle outlet and the cooling roller at take-off speeds of 20 m / min to 500 m / min.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Multimedia (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

L'invention concerne un procédé de fabrication d'une feuille (7), destinée à une membrane de haut-parleur ou de microphone, à partir d'un élastomère thermoplastique, caractérisé en ce qu'un élastomère thermoplastique est transformé en feuille par extrusion.
EP14783619.1A 2013-10-11 2014-10-10 Procédé de fabrication d'une feuille destinée à une membrane de haut-parleur ou de microphone Ceased EP3056024A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP14783619.1A EP3056024A1 (fr) 2013-10-11 2014-10-10 Procédé de fabrication d'une feuille destinée à une membrane de haut-parleur ou de microphone

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP13188270 2013-10-11
EP14783619.1A EP3056024A1 (fr) 2013-10-11 2014-10-10 Procédé de fabrication d'une feuille destinée à une membrane de haut-parleur ou de microphone
PCT/EP2014/071761 WO2015052316A1 (fr) 2013-10-11 2014-10-10 Procédé de fabrication d'une feuille destinée à une membrane de haut-parleur ou de microphone

Publications (1)

Publication Number Publication Date
EP3056024A1 true EP3056024A1 (fr) 2016-08-17

Family

ID=49356251

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14783619.1A Ceased EP3056024A1 (fr) 2013-10-11 2014-10-10 Procédé de fabrication d'une feuille destinée à une membrane de haut-parleur ou de microphone

Country Status (7)

Country Link
US (1) US20160234617A1 (fr)
EP (1) EP3056024A1 (fr)
JP (1) JP2016534685A (fr)
KR (1) KR20160070749A (fr)
CN (1) CN105637900A (fr)
HK (1) HK1223760A1 (fr)
WO (1) WO2015052316A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3240304A1 (fr) 2016-04-26 2017-11-01 Isovolta AG Membrane acoustique
JP6781662B2 (ja) * 2017-04-25 2020-11-04 信越ポリマー株式会社 振動板用フィルムの製造方法
WO2024124524A1 (fr) * 2022-12-16 2024-06-20 3M Innovative Properties Company Membrane pour micro haut-parleur et procédés associés

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62205147A (ja) * 1986-03-05 1987-09-09 Chisso Corp 音響振動板及び音響振動板用ポリプロピレン組成物
JP2997685B2 (ja) * 1990-04-03 2000-01-11 オンキヨー株式会社 スピーカ用振動板
JP2001189990A (ja) * 1999-12-28 2001-07-10 Jsp Corp スピーカー振動板用素材及びスピーカー振動板
EP2234409A3 (fr) * 2002-02-28 2010-10-06 The Furukawa Electric Co., Ltd. Haut-parleur planaire
JP3873960B2 (ja) * 2003-09-25 2007-01-31 オンキヨー株式会社 スピーカー振動板およびその製造方法
EP1429582B1 (fr) * 2002-12-09 2013-01-16 Onkyo Corporation Membrane de haut-parleur et méthode de son fabrication
CN2886962Y (zh) * 2006-01-16 2007-04-04 袁小军 扬声器编织平板复合盆结构
JP4990601B2 (ja) * 2006-11-20 2012-08-01 三菱樹脂株式会社 電気音響変換器用振動板および該振動板用のフィルム
BRPI1009817A2 (pt) * 2009-03-13 2016-03-15 Upm Raflatac Oy filme plástico orientado na direção da máquina, folha contínua de rótulo, produto de rótulo, e, uso do filme plástico
EP2268058B1 (fr) * 2009-06-26 2019-10-30 SSI New Material (Zhenjiang) Co., Ltd. Membrane pour un haut-parleur miniature
JP5565573B2 (ja) * 2010-06-25 2014-08-06 オンキヨー株式会社 スピーカー振動板、およびそのスピーカー振動板を備えるスピーカー

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
"About Pelprene", 19 September 2013 (2013-09-19), Retrieved from the Internet <URL:https://web.archive.org/web/20130919054454/http://www.toyobopelprene.com:80/about-pelprene.html> [retrieved on 20190114] *
"Kunststofffolie - Wikipedia", 1 August 2013 (2013-08-01), Retrieved from the Internet <URL:https://de.wikipedia.org/w/index.php?title=Kunststofffolie&oldid=121109689#Herstellung> [retrieved on 20191231] *
"Pelprene Basic Grades", 19 September 2013 (2013-09-19), Retrieved from the Internet <URL:https://web.archive.org/web/20130919035249/http://www.toyobopelprene.com/basic-grades.html> [retrieved on 20190114] *
See also references of WO2015052316A1 *

Also Published As

Publication number Publication date
WO2015052316A1 (fr) 2015-04-16
HK1223760A1 (zh) 2017-08-04
CN105637900A (zh) 2016-06-01
JP2016534685A (ja) 2016-11-04
KR20160070749A (ko) 2016-06-20
US20160234617A1 (en) 2016-08-11

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