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A full-loose pressed full-paper drum paper and its preparation method

A technology of loosening and drumming, applied in pulp beating method, special paper, papermaking, etc., can solve the problems of high-pitched high-pitched sound quality, easy distortion of sound quality, and damage of drum paper, and achieve clear sound quality, improve surface quality, and improve tightness. The effect of degree and intensity

Active Publication Date: 2018-09-25
梁胜祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the full-paper drum paper on the market is placed in the hot-pressing mold during the hot-pressing process. The gap between the upper and lower molds of the hot-pressing mold is 0.15mm, and it is hot-pressed at 250°C for about 25s. Hot press drying, because the heat of the mold destroys the fiber structure of the paper, the drum paper is damaged due to the vibration of the speaker when it is playing, resulting in high treble sound quality of the speaker, which sounds harsh, and the low frequency is insufficient, and the sound quality is easily distorted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Fully loose pressed full paper drum paper, prepared by a method comprising the following steps:

[0030] (1) Preparation of pulp: disintegrating, beating, and bleaching wood raw materials to obtain wood pulp, proportioning by weight, adding 20 parts of calcium carbonate, 3 parts of cationic compounds, 2 parts of anionic polysaccharides, 3 parts of Mix fiber dispersant and 2 parts of dry strength agent, stir evenly to obtain drum paper slurry;

[0031] (2) pulping forming: the drum paper slurry obtained in step (1) is screened for pulping, squeezed and dehydrated to obtain dehydrated paper;

[0032] (3) Drying: drying the dehydrated paper obtained in step (2) at 150° C. and a vacuum of -0.02 MPa for 5 minutes to obtain paper;

[0033] (4) Die-cutting: Die-cut the paper obtained in step (3) to obtain the full-loose pressed full-paper drum paper.

[0034] The thickness of the full loose pressed full paper drum paper is 0.79mm.

Embodiment 2

[0036] Fully loose pressed full paper drum paper, prepared by a method comprising the following steps:

[0037] (1) Preparation of paper pulp: disintegrating, beating, and bleaching the wood raw material, the degree of beating is 30 ° SR, to obtain wood pulp, proportioning by weight, adding 10 parts of titanium dioxide, 10 parts of calcium carbonate, 5 parts of calcium carbonate to 120 parts of wood pulp Parts of cationic compound, 3 parts of anionic polysaccharide, 4.5 parts of fiber dispersant and 2.5 parts of dry strength agent are mixed, and stirred evenly to obtain drum paper slurry;

[0038] (2) pulping forming: the drum paper slurry obtained in step (1) is screened for pulping, squeezed and dehydrated to obtain dehydrated paper;

[0039] (3) drying: drying the dehydrated paper obtained in step (2) at 200° C. and a vacuum degree of -0.08 MPa for 4 minutes to obtain paper;

[0040] (4) Die-cutting: Die-cut the paper obtained in step (3) to obtain the full-loose pressed f...

Embodiment 3

[0043] Fully loose pressed full paper drum paper, prepared by a method comprising the following steps:

[0044] (1) Preparation of paper pulp: disintegrating, beating, and bleaching the wood raw material, the degree of beating is 35 ° SR, to obtain wood pulp, the concentration of the wood pulp is 3.8%, add 5 1 part of titanium dioxide, 3 parts of kaolin, 3 parts of diatomaceous earth, 10 parts of calcium carbonate, 4 parts of cationic compound, 2.5 parts of anionic polysaccharide, 4 parts of fiber dispersant and 2.25 parts of dry strength agent for slurry mixing, and stir evenly to obtain drum paper slurry;

[0045] (2) Slurry forming: the drum paper slurry obtained in step (1) is screened, then saturated water vapor is used to heat-treat the slurry for 10 minutes, extruded and dehydrated to obtain dehydrated paper, and the humidity of the dehydrated paper is 36%;

[0046] (3) drying: drying the dehydrated paper obtained in step (2) at 180° C. and a vacuum of -0.05 MPa for 4....

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Abstract

The invention provides full-opening-pressure full-paper drum paper and a method for preparing the same. The method includes carrying out repulping, beating and bleaching and carrying out pulp mixing on fillers and chemical auxiliaries to obtain drum paper pulp; carrying out pulp fishing on the drum paper pulp; carrying out saturated steam treatment after pulp fishing is carried out; carrying out extruding dehydration. The full-opening-pressure full-paper drum paper and the method have the advantages that the surface quality of paper can be improved, and the tightness and the strength of the paper can be enhanced; vacuum drying is directly carried out at the low temperatures of 150-200 DEG C after pulp fishing forming is carried out, moisture in the paper can be removed, high-temperature and high-pressure treatment on the paper in drying procedures is omitted, fibers of the paper can be prevented from being damaged, accordingly, the strength and the flexibility of the obtained full-opening-pressure full-paper drum paper can be effectively improved, stereoscopic impression of human voice in intermediate frequencies can be enhanced, the voice is smooth and real, and the layering of low frequencies further can be enhanced; the generated voice is thick and solid and is free of noise or harshness, and tone is clear, natural and permeable.

Description

technical field [0001] The invention belongs to the papermaking field of trumpet drum paper, and in particular relates to a full-loose pressed full-paper drum paper and a preparation method thereof. Background technique [0002] Drum paper is divided into full paper drum paper, composite drum paper, Mylar drum paper and so on according to different materials. The common drum paper is composite drum paper, and the vibration part is usually pasted with a shock-resistant vibration edge, such as rubber edge, sponge edge, cloth edge and other materials. The all-paper drum paper, commonly known as the horn paper cone, is an important part of the horn's sound. The entire structure, including the vibrating ring, is formed by hot pressing of pulp, which is called all-paper drum paper. All-paper drum paper is characterized by lightness and high sensitivity. All-paper drum paper is widely used in mobile active audio in the market. Since the power supply is 12-24 volts, the energy st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H17/68D21H17/67D21H17/24D21H21/08D21H21/18D21D1/02D21F13/00H04R31/00H04R7/00
CPCD21D1/02D21F13/00D21H17/24D21H17/675D21H17/68D21H17/74D21H21/08D21H21/18D21H27/00H04R7/00H04R31/003
Inventor 梁胜祥
Owner 梁胜祥
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