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Flame-retardant paper cone for loudspeaker and preparation method thereof

A flame-retardant paper and speaker technology, which is applied in pulp beating method, papermaking, paper, etc., can solve the problem that the flame-retardant and moisture-proof performance of the paper cone cannot be guaranteed, the process of paper flame-retardant treatment is cumbersome, and it is not conducive to flexible adjustment of pulp formula and other problems, to achieve the effect of improving the strength of the paper cone, beautiful timbre and sound quality, and avoiding split vibration

Active Publication Date: 2022-05-24
GUOGUANG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN110219206A discloses a preparation method of a waterproof and flame-retardant paper cone, a loudspeaker and a paper cone. The back of the pot contains flame retardant; the invention provides a waterproof and flame-retardant paper cone, but in order to avoid the problem of mutual reaction and effect of the mixed use of flame retardant and waterproofing agent, the paper cone is only coated with flame retardant on one side and the other One side is coated with waterproofing agent, so it is impossible to ensure that the whole paper cone has flame retardancy and moisture resistance. When exposed to open flame for a long time, there is still a risk of being ignited, and the rigidity of the paper cone is low
The disadvantages of this method include: a. the slurry contains 30-60% glass fiber, which is not conducive to flexible adjustment of the slurry formula to meet the requirements of speaker tone and sound quality when applied to the speaker cone; b. The above-mentioned paper flame retardant treatment method is cumbersome, especially when the inorganic flame retardant is synthesized in situ on the plant fiber, it is difficult to control the consistency

Method used

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  • Flame-retardant paper cone for loudspeaker and preparation method thereof
  • Flame-retardant paper cone for loudspeaker and preparation method thereof

Examples

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Effect test

Embodiment 1

[0064] This embodiment provides a flame-retardant paper cone for a speaker, and the raw materials for preparing the flame-retardant paper cone for a speaker include, in parts by weight: 50 parts of unbleached kraft wood pulp, 45 parts of cotton pulp, 5 parts of basalt fiber, 1 part of ammonium polyphosphate and 1 part of DJ-17 hardener.

[0065] The preparation method of the flame-retardant paper cone for a loudspeaker described in this embodiment specifically includes the following steps:

[0066] (1) Beating: after crushing the pulp boards of unbleached kraft wood pulp and cotton pulp, place them in a beater, add water to dilute, and beat to obtain a pulp with a beating degree of 15°SR;

[0067] (2) papermaking: the slurry obtained in step (1) is mixed with basalt fiber, diluted with water to obtain a fiber suspension, and then the fiber suspension is filtered to obtain a paper basin embryo;

[0068] (3) Hot pressing: the paper cone blank obtained in step (2) is placed in a...

Embodiment 2

[0073] This embodiment provides a flame-retardant paper cone for a speaker, and the raw materials for the preparation of the flame-retardant paper cone for a speaker include in parts by weight: 60 parts of unbleached kraft wood pulp, 20 parts of cotton pulp, 20 parts of basalt fiber, 1 part of ammonium polyphosphate and 2 parts of DJ-17 hardener.

[0074] The preparation method of the flame-retardant paper cone for a loudspeaker described in this embodiment specifically includes the following steps:

[0075] (1) Beating: after crushing the pulp board of unbleached kraft wood pulp and cotton pulp, place it in a beater, add water to dilute, and beat to obtain a pulp with a beating degree of 20°SR;

[0076] (2) papermaking: the slurry obtained in step (1) is mixed with basalt fiber, diluted with water to obtain a fiber suspension, and then the fiber suspension is filtered to obtain a paper basin embryo;

[0077] (3) Hot pressing: the paper cone blank obtained in step (2) is plac...

Embodiment 3

[0082] This embodiment provides a flame-retardant paper cone for a speaker, and the raw materials for preparing the flame-retardant paper cone for a speaker include, in parts by weight: 40 parts of unbleached kraft wood pulp, 50 parts of cotton pulp, 10 parts of basalt fiber, 1 part of ammonium polyphosphate and 3 parts of DJ-17 hardener.

[0083] The preparation method of the flame-retardant paper cone for a loudspeaker described in this embodiment specifically includes the following steps:

[0084] (1) Beating: After crushing the pulp board of unbleached kraft wood pulp and cotton pulp, place it in a beater, add water to dilute, and beat to obtain a pulp with a beating degree of 18°SR;

[0085] (2) papermaking: the slurry obtained in step (1) is mixed with basalt fiber, diluted with water to obtain a fiber suspension, and then the fiber suspension is filtered to obtain a paper basin embryo;

[0086](3) Hot pressing: the paper cone blank obtained in step (2) is placed in a h...

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Abstract

The invention provides a flame-retardant paper cone for a loudspeaker and a preparation method thereof. The raw materials for preparing the flame-retardant paper cone for the loudspeaker include: unbleached kraft wood pulp, cotton pulp, basalt fiber, flame retardant and hardening agent. The flame-retardant paper cone for the loudspeaker has excellent flame retardancy, high strength, low moisture absorption of the paper cone, and stable sound quality.

Description

technical field [0001] The invention belongs to the technical field of electro-acoustics, and in particular relates to a flame-retardant paper cone for speakers and a preparation method thereof. Background technique [0002] The speaker paper cone is a special paper product, which is the most flammable object in a TV or radio; when the whole machine fails, the paper cone may catch fire and cause a fire, posing a safety hazard. Therefore, flame retardant performance is an important issue in the production of speaker cones. However, due to the limited water solubility of the flame retardant, the flame retardant effect will be reduced or limited when the paper is damp. At present, the material of the paper cone is mainly pulp plus other materials. In recent years, a variety of materials with different characteristics have entered, including polypropylene, carbon fiber, metal titanium, etc., and even diamond. However, it is still dominated by pulp. On the one hand, it is due t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/04D21H11/12D21H21/34D21D1/02D21J3/10D21H23/22D21H25/04D21H25/06H04R31/00H04R7/00
CPCD21H11/04D21H11/12D21H21/34D21D1/02D21J3/10D21H23/22D21H25/04D21H25/06H04R31/003H04R7/00H04R2307/021H04R2307/025H04R2307/029H04R2231/001
Inventor 司景航王世伟谢守华黄汉雄陈进
Owner GUOGUANG ELECTRIC
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