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JPS57138297A - Diaphragm for speaker and its manufacture - Google Patents

Diaphragm for speaker and its manufacture

Info

Publication number
JPS57138297A
JPS57138297A JP2412381A JP2412381A JPS57138297A JP S57138297 A JPS57138297 A JP S57138297A JP 2412381 A JP2412381 A JP 2412381A JP 2412381 A JP2412381 A JP 2412381A JP S57138297 A JPS57138297 A JP S57138297A
Authority
JP
Japan
Prior art keywords
fiber
diaphragm
nylon
paper
sheet
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
JP2412381A
Other languages
Japanese (ja)
Inventor
Toru Yamamoto
Hirotoshi Niiguchi
Kazumasa Yamamoto
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 JP2412381A priority Critical patent/JPS57138297A/en
Publication of JPS57138297A publication Critical patent/JPS57138297A/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)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To achieve the easy and continuous production of a diaphragm which has water resisting property improves and high internal loss by mixing adhesive short fiber with thermoplastic synthetic pulp, by making them into paper, and by performing thermal formation. CONSTITUTION:For example, 80wt% high-density synthetic pulp of polyethylene is used as a base, and 5wt% polyamide adhesive fiber (copolymer of nylon 6, nylon 6.6 and nylon 12) with 6mm. fiber length and 30 denier, 5wt% carbon fiber (6mm. fiber length), and 5wt% aramide fiber (2mm. fiber length) are added as reinforcing agents; and they are mixed well by a disaggregation machine to be made into paper. This sheet of paper is heated by a hot plate (180 deg.C) and then treated by cold press formation when the sheet is softened, thus obtaining a speaker diaphragm. This diaphragm has an adequately large modulus of elasticity and sufficiently large internal loss to have flat frequency characteistics. Further, the continuous thermal formation of more than one sheet is achieved.
JP2412381A 1981-02-19 1981-02-19 Diaphragm for speaker and its manufacture Pending JPS57138297A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2412381A JPS57138297A (en) 1981-02-19 1981-02-19 Diaphragm for speaker and its manufacture

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2412381A JPS57138297A (en) 1981-02-19 1981-02-19 Diaphragm for speaker and its manufacture

Publications (1)

Publication Number Publication Date
JPS57138297A true JPS57138297A (en) 1982-08-26

Family

ID=12129525

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2412381A Pending JPS57138297A (en) 1981-02-19 1981-02-19 Diaphragm for speaker and its manufacture

Country Status (1)

Country Link
JP (1) JPS57138297A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007049471A (en) * 2005-08-10 2007-02-22 Sony Corp Loudspeaker diaphragm

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007049471A (en) * 2005-08-10 2007-02-22 Sony Corp Loudspeaker diaphragm

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