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Waterproof air-isolating paper cone and preparation method and application thereof

A waterproof partition and paper cone technology, which is applied in special paper, paper, papermaking, etc., can solve the problems of increased paper cone weight and lower speaker sensitivity, and achieves the effects of increased strength, excellent mildew resistance, and excellent film-forming properties

Active Publication Date: 2021-04-06
GUOGUANG ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method will greatly increase the weight of the paper cone, which will lead to a decrease in the sensitivity of the speaker

Method used

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  • Waterproof air-isolating paper cone and preparation method and application thereof
  • Waterproof air-isolating paper cone and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0074] This embodiment provides a waterproof and air-insulating paper cone, which is prepared by the following preparation method:

[0075] (1) 50 parts of bleached sulphate softwood pulp, 30 parts of cotton pulp and 20 parts of Spanish straw pulp are mixed and beaten to obtain a degree of beating that is 25 ° SR component A; 1 part of chitosan and 100 parts Parts of 0.2mol / L acetic acid solution were mixed to obtain component B;

[0076] (2) Dilute the component A obtained in step (1) with water to obtain a fiber suspension, mix and stir with component B for 20 minutes, then mix and stir with 8 parts of cationic styrene-acrylic emulsion for 15 minutes, and obtain a paper cone wet embryo after filtering;

[0077] (3) placing the wet paper cone blank obtained in step (2) in a high-temperature mold, pressing and drying at 130°C to obtain a paper cone blank;

[0078] (4) Using a punching die to remove the middle hole and edge material of the paper cone blank obtained in step (3)...

Embodiment 2

[0080] This embodiment provides a waterproof and air-insulating paper cone, which is prepared by the following preparation method:

[0081] (1) 40 parts of bleached sulphate softwood pulp, 50 parts of cotton pulp and 10 parts of Spanish straw pulp are mixed and beaten to obtain the component A of 25 ° SR; 1.2 parts of chitosan and 120 parts Parts of 0.2mol / L acetic acid solution were mixed to obtain component B;

[0082] (2) Dilute component A obtained in step (1) with water to obtain a fiber suspension, mix and stir with component B for 20 minutes, then mix and stir with 5 parts of cationic styrene-acrylic emulsion for 15 minutes, and obtain a paper cone wet embryo after filtering;

[0083] (3) placing the wet paper cone blank obtained in step (2) in a high-temperature mold, pressing and drying at 130°C to obtain a paper cone blank;

[0084] (4) Using a punching die to remove the middle hole and edge material of the paper cone blank obtained in step (3), to obtain the waterp...

Embodiment 3

[0086] This embodiment provides a waterproof and air-insulating paper cone, which is prepared by the following preparation method:

[0087] (1 ') 60 parts of bleached kraft softwood pulp, 20 parts of cotton pulp and 20 parts of Spanish grass pulp are mixed and beaten to obtain a degree of percussion as component A of 25 ° SR; 0.4 parts of chitosan and 20 parts of 0.2mol / L acetic acid solutions were mixed to obtain component B;

[0088] (2') Dilute the component A obtained in step (1') with water to obtain a fiber suspension, mix and stir with 10 parts of cationic styrene-acrylic emulsion for 15 minutes, and filter to obtain a paper cone wet embryo;

[0089](3') Place the wet paper cone embryo obtained in step (2') in a high-temperature mould, and after pressing and drying at 130°C, use the component B obtained in step (1') to carry out surface spraying treatment. Dry at 50°C for 1 hour to obtain a paper cone blank;

[0090] (4') Using a punching die to remove the middle hole...

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Abstract

The invention provides a waterproof air-isolating paper cone and a preparation method and application thereof. The waterproof air-isolating paper cone is prepared from the following raw materials: bleached sulfate softwood pulp, cotton pulp, Spanish grass pulp, a cationic styrene-acrylic emulsion and chitosan. The paper cone is composed of the paper pulp, the cationic styrene-acrylic emulsion and the chitosan. Pulp with long and soft fibers and excellent interweavability and filling property is selected as the paper pulp so as to reduce inherent porosity in a network structure of the paper cone; and then the paper cone is endowed with excellent waterproof air-isolating performance through the synergistic interaction of the cationic styrene-acrylic emulsion and the chitosan.

Description

technical field [0001] The invention belongs to the technical field of loudspeaker manufacturing, and in particular relates to a waterproof air-insulating paper cone, a preparation method and application thereof. Background technique [0002] The main raw material of the speaker cone is plant fiber, which endows the cone with natural hydrophilicity, resulting in poor waterproof performance of the cone. After the cone absorbs water and gets damp, on the one hand, the mechanical properties of the cone will be greatly reduced, and on the other hand, it will Make the paper cone heavier, and the acoustic characteristics of the speaker will also change; when the paper cone is wet and dry many times, it may cause fatigue of the material itself, and even cause irreversible deformation and damage to the paper cone; therefore, the paper cone It is very necessary to carry out waterproof and moisture-proof treatment. In addition, more and more audio products are used in harsh environme...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21H11/04D21H11/12D21H17/44D21H17/24D21H21/16D21J3/00H04R31/00
CPCD21H27/00D21H11/04D21H11/12D21H17/44D21H17/24D21H21/16D21H17/72D21J3/00H04R31/00
Inventor 司景航王世伟黄汉雄李豪
Owner GUOGUANG ELECTRIC
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