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Fine natural fiber and speaker diaphragm coated with fine natural fiber

A natural fiber and miniaturization technology, which is applied in the direction of cellulose material diaphragm, fiber raw material processing, sensor, etc., can solve the problems of increasing the number of speaker parts, reducing the characteristics of the vibration plate, and reducing the efficiency of installation work

Active Publication Date: 2010-08-25
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the auxiliary parts are attached as a whole in this way, the weight of the vibrating plate increases and the characteristics of the vibrating plate decrease.
In addition, when the auxiliary parts are partially pasted, the number of speaker parts increases, and the installation work efficiency is reduced.

Method used

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  • Fine natural fiber and speaker diaphragm coated with fine natural fiber
  • Fine natural fiber and speaker diaphragm coated with fine natural fiber
  • Fine natural fiber and speaker diaphragm coated with fine natural fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A pressurized mixer 20 with a capacity of 3 liters was used to beat a 500 g bamboo fiber material 10 with a length of about 10 cm for 20 minutes at a speed of 25 rpm to produce a material 10R. The beaten material 10R had an average fiber length of 2.5mm and a Canadian Standard Freeness of 750ml.

[0069] The material 10R was mixed with water to make an aqueous dispersion with a concentration of 3%. This aqueous dispersion was miniaturized for 20 minutes with 100 g of glass beads in a bead mill 21 with a capacity of 3 liters, and the material 10S was produced. The average fiber length of the fibers of the micronized material 10S is 1mm, and the BET specific surface area is 2.22m 2 / g, Canadian Standard Freeness cannot be measured.

Embodiment 2

[0077] The material 10R produced by the pressure mixer 20 of Example 1 and the material 10S produced by the bead mill 21 were mixed to produce the speaker component 1001 . Specifically, using 90 wt% of the material 10R and 10 wt% of the material 10S, a flat plate and a vibration plate for a speaker with a diameter of 16 cm were manufactured. The sound velocity of the flat plate is 3500m / s-4000m / s.

Embodiment 3

[0083] As in Comparative 4, only the material 10R produced by the pressure mixer 20 of Example 1 was used to produce a flat plate and a speaker diaphragm with a diameter of 16 cm. On the flat plate and vibrating plate, the material 10S produced by the bead mill 21 was spray-coated. The weight of the coated material 10S after drying was about 0.3 g. The speed of sound of the plate is 3800m / s-4500m / s.

[0084] After assembling the speakers using the diaphragms of Example 2, Comparative Example 4, Comparative Example 5, and Example 3, five persons conducted audition evaluations. The vibrating plate was evaluated with 3 points each for clarity of sound, B) energy of sound, and roundness of sound, 9 points per person, totaling 45 points. The vibrating plate of Example 2 has 39 points. The vibrating plate of Example 3 has 41 points. The vibrating plate of Comparative Example 4 was 30 minutes. The vibrating plate of Comparative Example 5 has 21 points. In this way, by using the...

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Abstract

A natural fiber is beaten by a biaxial kneading machine. The beaten natural fiber is made finer by a bead mill so that it has a BET specific surface area of not less than 1 m2 / g. By this process, a fine fiber for obtaining a rigid paper-made component can be produced in a short time.

Description

technical field [0001] The present invention relates to a micronized natural fiber, its manufacturing method and manufacturing device, and a speaker using the micronized natural fiber. Background technique [0002] Due to the remarkable progress of digital technology, recent electronic equipment such as audio equipment and video equipment can seek a dramatic improvement in performance. Therefore, there is a strong demand in the market for performance improvement of speakers used in these electronic devices. [0003] Among the constituent parts of this speaker, the diaphragm plays a large role in determining the sound quality. Therefore, it is essential to improve the performance of the diaphragm as the core of the diaphragm. As part of this, we attach great importance to the manufacture of sound and characteristics to meet customer needs for various purposes. In order to realize the sound and characteristics that meet these customer needs, the vibrating parts are made of p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21D1/34H04R7/02H04R7/12H04R31/00
CPCH04R7/125H04R2307/025H04R31/003H04R7/26D21D1/38H04R2307/021Y10T428/298
Inventor 三村和义岛崎幸博新小田裕小池俊之
Owner PANASONIC CORP
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