JPS642499A - Manufacture of speaker diaphragm - Google Patents

Manufacture of speaker diaphragm

Info

Publication number
JPS642499A
JPS642499A JP15657487A JP15657487A JPS642499A JP S642499 A JPS642499 A JP S642499A JP 15657487 A JP15657487 A JP 15657487A JP 15657487 A JP15657487 A JP 15657487A JP S642499 A JPS642499 A JP S642499A
Authority
JP
Japan
Prior art keywords
propylene polymer
manufacture
speaker diaphragm
modified
minutes
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
JP15657487A
Other languages
Japanese (ja)
Other versions
JPH012499A (en
Inventor
Kenji Takemura
Toshio Norimoto
Masayoshi Nakamura
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.)
Resonac Holdings Corp
Original Assignee
Showa Denko KK
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 Showa Denko KK filed Critical Showa Denko KK
Priority to JP62-156574A priority Critical patent/JPH012499A/en
Priority claimed from JP62-156574A external-priority patent/JPH012499A/en
Publication of JPS642499A publication Critical patent/JPS642499A/en
Publication of JPH012499A publication Critical patent/JPH012499A/en
Pending legal-status Critical Current

Links

Landscapes

  • Injection Moulding Of Plastics Or The Like (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

PURPOSE:To facilitate the manufacture of a speaker diaphragm by specifying the composition rate of fibrous fillers in a compound for a mixture of the fibrous fillers and a modified propylene polymer which is modified with unsaturable carboxylic acid and/or its anhydride. CONSTITUTION:A propylene polymer used to manufacture the modified propylene polymer, a propylene polymer used to manufacture a compound, and a propylene polymer used to manufacture the speaker diaphragm may all be homopolymers. Further, the melt flow index (MFR) of the propylene polymer is 30-100g/10 minutes, preferably 35-100g/10 minutes, and most preferably 40-100g/10 minutes, A 5-50wt.pts propylene polymer 5 with said MFR value is mixed with a 100wt.pts modified propylene polymer. Further, a 5-50wt.%, preferably 5-45wt.%, and most preferably 5-45wt.% fibrous filler is contained in the compound.
JP62-156574A 1987-06-25 Manufacturing method of speaker diaphragm Pending JPH012499A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62-156574A JPH012499A (en) 1987-06-25 Manufacturing method of speaker diaphragm

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62-156574A JPH012499A (en) 1987-06-25 Manufacturing method of speaker diaphragm

Publications (2)

Publication Number Publication Date
JPS642499A true JPS642499A (en) 1989-01-06
JPH012499A JPH012499A (en) 1989-01-06

Family

ID=

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007243279A (en) * 2006-03-06 2007-09-20 Matsushita Electric Ind Co Ltd Diaphragm for speaker, speaker employing the same, and electronic equipment
CN114907642A (en) * 2021-02-10 2022-08-16 广州汽车集团股份有限公司 Polypropylene composite material for automobile bumper and preparation method thereof

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007243279A (en) * 2006-03-06 2007-09-20 Matsushita Electric Ind Co Ltd Diaphragm for speaker, speaker employing the same, and electronic equipment
CN114907642A (en) * 2021-02-10 2022-08-16 广州汽车集团股份有限公司 Polypropylene composite material for automobile bumper and preparation method thereof
CN114907642B (en) * 2021-02-10 2023-11-03 广州汽车集团股份有限公司 Polypropylene composite material for automobile bumper and preparation method thereof

Similar Documents

Publication Publication Date Title
EP0380824A3 (en) Compounds rendered compatible, comprising a polyamide and polypropylene, and adhesive structures containing same
GB2155028B (en) Non-asbestos clutch facing
ES8200710A1 (en) Resorcine-filler composition, process for preparing such a composition and its use.
MY106286A (en) High-melt-flow fiber-reinforced, propylene compositions
EP0107805A3 (en) Mixed 2,2,6,6-tetramethyl piperidinyl carboxylic acid ester and amide light stabilizers and stabilized synthetic polymers
FR2432550A1 (en) PROCESS FOR THE MANUFACTURE OF AN EASILY FLOWABLE PULVERULATED DESULFURIZATION MIXTURE
ATE70978T1 (en) COMPOSITION TO INCREASE HAEMATOCRIT IN A NORMAL MAMMAL.
JPS642499A (en) Manufacture of speaker diaphragm
ES8304897A1 (en) Process for producing a plastic composition which can be processed into a fire-resistant material
PT77595A (en) Bismaleimide-containing thermosetting compositions and polymers
GR3018286T3 (en) Process to graft stereoregular polymers of branched, higher alpha-olefins and compositions thereof.
AU569720B2 (en) Catalyst
GB1420632A (en) Polymerisable plastics composition
JPS57119951A (en) Polyamide composition
ES259975U (en) Bobbin
ES8505915A1 (en) Perfumery compounds and their preparation.
GB519547A (en) Process for the manufacture of light and porous materials from natural cellulose fibres and cement or mortar
JPS57196695A (en) Diaphragm for speaker
DE69210053D1 (en) Process for grafting stereoregular polymers of branched higher olefins and compositions therewith
CA1272340C (en) Reflectance standard of an acrylate polymer
JPS5643335A (en) Improvement in adhesion between carbon fiber and unsaturated matrix resin
MY103487A (en) Composition for the production of magnets and magnets produced therefrom
JPS56118009A (en) Filler for dental use
JPS5272751A (en) Preparation of phenolic resin molding materials
JPS57206197A (en) Diaphragm for loudspeaker