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A semi-loose pressed all-paper drum paper and its preparation method

A technology of drum paper and loose pressing, which is applied in the field of semi-loose pressed full-paper drum paper and its preparation, which can solve the problems of poor toughness and lack of sound quality of drum paper, and achieve improved surface quality, layering, strength and flexibility Effect

Active Publication Date: 2018-10-23
梁胜祥
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the short fiber in the all-paper drum paper on the market and the poor toughness of the drum paper, the speaker using the all-paper drum paper is slightly lacking in sound quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Semi-loose pressed all-paper drum paper, prepared by a process comprising the following steps:

[0031] (1) Preparation of pulp: disintegrate, beat, and bleach wood raw materials to obtain wood pulp, and add 10 parts of calcium carbonate, 2 parts of cationic compounds, 1 part of anionic polysaccharide, and 0.5 parts of Fiber dispersant and 0.5 part of dry strength agent are mixed, and stirred evenly to obtain drum paper slurry;

[0032] (2) pulping forming: the drum paper slurry obtained in step (1) is screened for pulping, squeezed and dehydrated to obtain dehydrated paper;

[0033] (3) Hot press molding: place the dehydrated paper obtained in step (2) in a hot press mold with a gap of 0.75 mm, and perform hot press drying at a temperature of 175° C. for 55 seconds to obtain paper;

[0034] (4) Die-cutting: Die-cut the paper obtained in step (3) to obtain the semi-loose pressed full-paper drum paper.

[0035] The thickness of the semi-loose full-paper drum paper is 0...

Embodiment 2

[0037] Semi-loose pressed all-paper drum paper, prepared by a process comprising the following steps:

[0038] (1) Preparation of pulp: disintegrating, beating, and bleaching the wood raw material. 1 part of cationic compound, 2 parts of anionic polysaccharide, 1.5 parts of fiber dispersant and 1.5 parts of dry strength agent are mixed, and stirred evenly to obtain drum paper slurry;

[0039] (2) pulping forming: the drum paper slurry obtained in step (1) is screened for pulping, squeezed and dehydrated to obtain dehydrated paper;

[0040] (3) Hot press molding: place the dehydrated paper obtained in step (2) in a hot press mold with a gap of 0.85 mm, and perform hot press drying at a temperature of 185° C. for 65 seconds to obtain paper;

[0041] (4) Die-cutting: Die-cut the paper obtained in step (3) to obtain the semi-loose pressed full-paper drum paper.

[0042] The thickness of the semi-loose pressed all-paper drum paper is 0.81 mm.

Embodiment 3

[0044] Semi-loose pressed all-paper drum paper, prepared by a process comprising the following steps:

[0045] (1) Prepare paper pulp: disintegrate, beat, and bleach the wood raw material, and the beating degree is 35 ° SR to obtain wood pulp. The concentration of the wood pulp is 3.8%, and 3 1 part of titanium dioxide, 3 parts of kaolin, 2 parts of gypsum, 2 parts of diatomaceous earth, 5 parts of calcium carbonate, 1.5 parts of cationic compound, 1.5 parts of anionic polysaccharide, 1.5 parts of fiber dispersant and 1.5 parts of dry strength agent for slurrying, stirring evenly to obtain Drum pulp;

[0046] (2) Slurry forming: the drum paper slurry obtained in step (1) is subjected to screen slagging, then saturated water vapor is used to heat-treat the slurries for 10 minutes, extruded and dehydrated to obtain dehydrated paper, and the humidity of the dehydrated paper is 36%;

[0047] (3) Hot press molding: place the dehydrated paper obtained in step (2) in a hot press mo...

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Abstract

The invention provides semi-decompression full-paper drum paper. Drum paper pulp is obtained through beating, pulping and bleaching and mixing with filler and a chemical assistant; the drum paper pulp is subjected to pulp fishing; after the pulp fishing, the drum paper pulp is treated by saturated steam and then extruded for dewatering; the surface quality of paper is improved, and the tightness and strength of the paper are enhanced; in a hot compression moulding technology, a low-temperature decompression technology is adopted; in the process, the pulp fiber is not damaged remarkably due to low temperature, low pressure and no paper compression; the strength and flexibility of the drum paper are effectively improved; meanwhile, the stereoscopic impression of medium-frequency human voice is improved, and the voice is moist and real; the layering of low frequency is improved, thus the voice is thick, does not noisy or harsh, and the tone quality is clear, natural and transparent.

Description

technical field [0001] The invention belongs to the papermaking field of trumpet drum paper, and in particular relates to a semi-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. [0003] All-paper drums are widely used in mobile active audio. Since the power supply is 12-24 volts, the energy of the batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/00D21H17/68D21H17/67D21H17/24D21H21/08D21H21/18D21H17/00D21F13/00D21J3/12H04R31/00H04R7/04
CPCD21F13/00D21H17/00D21H17/24D21H17/675D21H17/68D21H21/08D21H21/18D21H27/00D21J3/12H04R7/04H04R31/003
Inventor 梁胜祥
Owner 梁胜祥
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