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Flame-retardant paper cone for loudspeaker and preparation method of flame-retardant paper cone

A flame retardant paper and speaker technology, which is applied in pulp beating methods, paper, papermaking, etc., can solve the problem of inability to guarantee the flame retardancy and moisture resistance of the paper cone, the cumbersome process of the paper flame retardant treatment method, and the inconvenient adjustment of the pulp formula flexibly and other problems, to achieve the effect of improving the strength of the paper cone, low moisture absorption, and stable sound quality

Active Publication Date: 2020-08-18
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 of flame-retardant paper cone
  • Flame-retardant paper cone for loudspeaker and preparation method of flame-retardant paper cone

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Effect test

Embodiment 1

[0064] This embodiment provides a flame-retardant paper cone for a speaker. 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 hardening agent.

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

[0066] (1) beating: after the pulp boards of unbleached kraft wood pulp and cotton pulp are crushed, they are placed in a beater, diluted with water, and beating is performed to obtain a slurry with a degree of beating of 15 ° SR;

[0067] (2) Papermaking: mixing the slurry obtained in step (1) with basalt fibers, diluting with water to obtain a fiber suspension, and then filtering the fiber suspension to obtain a paper cone blank;

[0068] (3) Hot pressing: press the paper cone blank ob...

Embodiment 2

[0073] This embodiment provides a flame-retardant paper cone for a speaker. The raw materials for preparing 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 hardening agent.

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

[0075] (1) beating: after the pulp boards of unbleached kraft wood pulp and cotton pulp are crushed, they are placed in a beater, diluted with water, and beating is performed to obtain a slurry with a degree of beating of 20 ° SR;

[0076] (2) Papermaking: mixing the slurry obtained in step (1) with basalt fibers, diluting with water to obtain a fiber suspension, and then filtering the fiber suspension to obtain a paper cone blank;

[0077] (3) Hot pressing: press the paper cone blank ...

Embodiment 3

[0082] This embodiment provides a flame-retardant paper cone for a speaker. 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 hardening agent.

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

[0084] (1) beating: after the pulp boards of unbleached kraft wood pulp and cotton pulp are crushed, place them in a beater, add water to dilute, and perform beating to obtain a slurry that has a degree of beating of 18 ° SR;

[0085] (2) Papermaking: mixing the slurry obtained in step (1) with basalt fibers, diluting with water to obtain a fiber suspension, and then filtering the fiber suspension to obtain a paper cone blank;

[0086](3) Hot pressing: press the paper cone blank obtain...

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Abstract

The invention provides a flame-retardant paper cone for a loudspeaker and a preparation method of the flame-retardant paper cone. The flame-retardant paper cone for the loudspeaker is composed of thepreparation raw materials: unbleached sulfate wood pulp, cotton pulp, basalt fibers, a flame retardant and a hardening agent. The flame-retardant paper cone for the loudspeaker is excellent in flame retardance, high in strength, small in moisture absorption and stable in tone quality.

Description

technical field [0001] The invention belongs to the field of electroacoustic technology, and in particular relates to a flame-retardant paper cone for a loudspeaker 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 breaks down, the paper cone may catch fire and cause a fire, which poses a safety hazard. Therefore, flame retardancy is an important issue in the production of speaker cones. However, because the water solubility of the flame retardant is limited, 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, such as polypropylene, carbon fiber, metal titanium, etc., and even diamond. But pulp is still the main one. On the one hand, it is because...

Claims

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Application Information

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Patent Type & Authority Applications(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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