JPS55157652A - Molding composition - Google Patents

Molding composition

Info

Publication number
JPS55157652A
JPS55157652A JP2411980A JP2411980A JPS55157652A JP S55157652 A JPS55157652 A JP S55157652A JP 2411980 A JP2411980 A JP 2411980A JP 2411980 A JP2411980 A JP 2411980A JP S55157652 A JPS55157652 A JP S55157652A
Authority
JP
Japan
Prior art keywords
pitch
graphite
molding composition
powdery graphite
residue
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
JP2411980A
Other languages
Japanese (ja)
Inventor
Nobuhiro Tsukagoshi
Teruo Toma
Shinichi Yokozeki
Toshikazu Yoshino
Yasuhiro 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 JP2411980A priority Critical patent/JPS55157652A/en
Publication of JPS55157652A publication Critical patent/JPS55157652A/en
Pending legal-status Critical Current

Links

Landscapes

  • Compositions Of Macromolecular Compounds (AREA)
  • Inorganic Fibers (AREA)
  • Ceramic Products (AREA)

Abstract

PURPOSE: A molding composition that is obtained by mixing petroleum cracking pitch and powdery graphite, thus giving diaphragms for speaker with high specific modulus and large internal loss.
CONSTITUTION: A crude oil-cracked pitch obtained as a residue after the separation of the gaseous product containing acetylene, ethylene and others from the cracked product of crude oil or its fraction at a temperature of higher than 900°C is kneaded with powdery graphite of 0.1W50μ particle sizes such as scaly graphite in a kneader or rollers under heating up to an extent of 200°C to give said molding composition. Or the above pitch is dissolved in a solvent and then may be mixed with the powdery graphite. Especially, the quinoline insoluble component is removed from the above pitch and the residue is heated to 400W450°C to form liquid crystals, which is crushed. When this product is mixed with the powdery graphite, the composition shows high elasticity and strength.
COPYRIGHT: (C)1980,JPO&Japio
JP2411980A 1980-02-29 1980-02-29 Molding composition Pending JPS55157652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2411980A JPS55157652A (en) 1980-02-29 1980-02-29 Molding composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2411980A JPS55157652A (en) 1980-02-29 1980-02-29 Molding composition

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2412080A Division JPS56797A (en) 1980-02-29 1980-02-29 Manufacture for acoustic diaphragm plate

Publications (1)

Publication Number Publication Date
JPS55157652A true JPS55157652A (en) 1980-12-08

Family

ID=12129422

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2411980A Pending JPS55157652A (en) 1980-02-29 1980-02-29 Molding composition

Country Status (1)

Country Link
JP (1) JPS55157652A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156027A (en) * 1982-03-13 1983-09-16 Nippon Steel Chem Co Ltd Preparation of carbon fiber

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58156027A (en) * 1982-03-13 1983-09-16 Nippon Steel Chem Co Ltd Preparation of carbon fiber

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