JPS642499A - Manufacture of speaker diaphragm - Google Patents
Manufacture of speaker diaphragmInfo
- 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
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.
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)
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)
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 |
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