JPS57197997A - Acoustic diaphragm - Google Patents

Acoustic diaphragm

Info

Publication number
JPS57197997A
JPS57197997A JP8316081A JP8316081A JPS57197997A JP S57197997 A JPS57197997 A JP S57197997A JP 8316081 A JP8316081 A JP 8316081A JP 8316081 A JP8316081 A JP 8316081A JP S57197997 A JPS57197997 A JP S57197997A
Authority
JP
Japan
Prior art keywords
modulus
microballoons
fibers
proper
thermosetting resin
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
JP8316081A
Other languages
Japanese (ja)
Inventor
Hideaki Mochizuki
Toru Tamura
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP8316081A priority Critical patent/JPS57197997A/en
Publication of JPS57197997A publication Critical patent/JPS57197997A/en
Pending 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To produce light-weight goods having a high Young's modulus, by using materials where volume ratios of high-modulus fibers and microballoons are 10-40% together in a thermosetting resin. CONSTITUTION:High-modulus fibers and microballoons are combined by a thermosetting resin to form a diaphragm. High elasticity fibers of organic compounds, high-modulus carbon fibers, ceramic fibers, etc. having >=1X10<5>kg/cm<2> Young's modulus are used as high-modulus fibers; and glass microballoons, ''shirasu'' sand microballoons are proper as microballoons, and it is desirable that the maximum particle size is <1mm.. An epoxy resin where a middle or high- temperature hardening agent is mixed in glycidyl ether of bisphenol A is proper as the thermosetting resin. It is proper that volume ratios of high-modulus fibers and microballoons to the overall composite are 10-40% together. Thus, excellent goods are obtained.
JP8316081A 1981-05-29 1981-05-29 Acoustic diaphragm Pending JPS57197997A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8316081A JPS57197997A (en) 1981-05-29 1981-05-29 Acoustic diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8316081A JPS57197997A (en) 1981-05-29 1981-05-29 Acoustic diaphragm

Publications (1)

Publication Number Publication Date
JPS57197997A true JPS57197997A (en) 1982-12-04

Family

ID=13794494

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8316081A Pending JPS57197997A (en) 1981-05-29 1981-05-29 Acoustic diaphragm

Country Status (1)

Country Link
JP (1) JPS57197997A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7889959B2 (en) * 2008-02-07 2011-02-15 Lockheed Martin Corporation Composite material for cable floatation jacket

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7889959B2 (en) * 2008-02-07 2011-02-15 Lockheed Martin Corporation Composite material for cable floatation jacket

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