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JPS55127445A - Molding material - Google Patents

Molding material

Info

Publication number
JPS55127445A
JPS55127445A JP6395779A JP6395779A JPS55127445A JP S55127445 A JPS55127445 A JP S55127445A JP 6395779 A JP6395779 A JP 6395779A JP 6395779 A JP6395779 A JP 6395779A JP S55127445 A JPS55127445 A JP S55127445A
Authority
JP
Japan
Prior art keywords
diaphragm
molding material
graphite powder
polymeric material
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.)
Granted
Application number
JP6395779A
Other languages
Japanese (ja)
Other versions
JPS5635699B2 (en
Inventor
Kunio Imai
Nobuhiro Tsukagoshi
Shinichi Yokozeki
Toshikazu Yoshino
Yasuyuki Arai
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.)
Pioneer Corp
Original Assignee
Pioneer Electronic Corp
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 Pioneer Electronic Corp filed Critical Pioneer Electronic Corp
Priority to JP6395779A priority Critical patent/JPS55127445A/en
Priority to GB8009358A priority patent/GB2046274B/en
Priority to DE19803011056 priority patent/DE3011056C2/en
Priority to US06/132,980 priority patent/US4341838A/en
Publication of JPS55127445A publication Critical patent/JPS55127445A/en
Publication of JPS5635699B2 publication Critical patent/JPS5635699B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE: To provide molding material useful for forming diaphragm which is used for a speaker, is highly elastic and lightweight, and has high internal loss characteristics, obtd. by a method wherein a polymeric material is mixed with graphite powder and carbon black and the mixt. is kneaded.
CONSTITUTION: Required amounts of graphite powder 2 having an average particle diameter of not more than 20μ in the form of scale powder, and carbon black 3 are added to a polymeric material 1 such as polyvinyl chloride, polyvinylidene chloride, or polyvinyl chloride-acetate copolymer. The mixt. is kneaded by a kneader or roll, while heating to the melt temperature of the polymeric material, to obtain the desired molding material. In order to form a diaphragm from the molding material, the molding material is rolled to form a sheet. The orientation of the graphite powder 2 is arranged in parallel with the surface of the sheet material. The sheet material is molded into the shape of the desired diaphragm A by vacuum forming, press molding, etc. It is preferred to carry out further carbonization and graphitization treatment to further improve the elastic coefficient of the diaphragm A.
COPYRIGHT: (C)1980,JPO&Japio
JP6395779A 1979-03-23 1979-05-25 Molding material Granted JPS55127445A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP6395779A JPS55127445A (en) 1979-05-25 1979-05-25 Molding material
GB8009358A GB2046274B (en) 1979-03-23 1980-03-20 Moulding compositions and acoustic articles moulded therefrom
DE19803011056 DE3011056C2 (en) 1979-03-23 1980-03-21 Shaped body for use as a component in acoustic instruments
US06/132,980 US4341838A (en) 1979-03-23 1980-03-24 Molding compositions and diaphragms, arm pipes and head shells molded therefrom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6395779A JPS55127445A (en) 1979-05-25 1979-05-25 Molding material

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
JP54033263A Division JPS6056360B2 (en) 1979-03-23 1979-03-23 Diaphragm for audio equipment

Publications (2)

Publication Number Publication Date
JPS55127445A true JPS55127445A (en) 1980-10-02
JPS5635699B2 JPS5635699B2 (en) 1981-08-19

Family

ID=13244295

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6395779A Granted JPS55127445A (en) 1979-03-23 1979-05-25 Molding material

Country Status (1)

Country Link
JP (1) JPS55127445A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57174334A (en) * 1981-04-20 1982-10-27 Nippon Zeon Co Ltd Preparation for electroconductive polyvinyl chloride resin composition
JPS5996142A (en) * 1982-11-24 1984-06-02 Mitsubishi Petrochem Co Ltd Electrically conductive resin composition
JPS601250A (en) * 1983-05-26 1985-01-07 Nippon Steel Chem Co Ltd Electrically conductive resin composition
JPH0333656U (en) * 1989-08-08 1991-04-03

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS524091A (en) * 1975-06-30 1977-01-12 Tokyo Ink Kk Conductive mixture
JPS5242295A (en) * 1975-10-01 1977-04-01 Nippon Kokuen Kogyo Kk Production method of flexible sheet with low resistance

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS524091A (en) * 1975-06-30 1977-01-12 Tokyo Ink Kk Conductive mixture
JPS5242295A (en) * 1975-10-01 1977-04-01 Nippon Kokuen Kogyo Kk Production method of flexible sheet with low resistance

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57174334A (en) * 1981-04-20 1982-10-27 Nippon Zeon Co Ltd Preparation for electroconductive polyvinyl chloride resin composition
JPH0237368B2 (en) * 1981-04-20 1990-08-23 Nippon Zeon Co
JPS5996142A (en) * 1982-11-24 1984-06-02 Mitsubishi Petrochem Co Ltd Electrically conductive resin composition
JPH0416500B2 (en) * 1982-11-24 1992-03-24 Mitsubishi Petrochemical Co
JPS601250A (en) * 1983-05-26 1985-01-07 Nippon Steel Chem Co Ltd Electrically conductive resin composition
JPH0353341B2 (en) * 1983-05-26 1991-08-14 Shinnittetsu Kagaku
JPH0333656U (en) * 1989-08-08 1991-04-03

Also Published As

Publication number Publication date
JPS5635699B2 (en) 1981-08-19

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