Semi-decompression full-paper drum paper and preparation method thereof

A drum paper and loose-pressing technology, applied in the field of semi-loose-pressed full-paper drum paper and its preparation, can solve the problems of lack of sound quality, poor drum paper toughness, etc., and achieve the effects of enhancing layering, improving surface quality and simple process

Active Publication Date: 2017-09-05
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 th

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0029] Example 1

[0030] Semi-loosely pressed whole paper drum paper, prepared by a method including the following steps:

[0031] (1) Preparation of pulp: the wood raw materials are crushed, beaten, and bleached to obtain wood pulp. According to the weight ratio, add 10 parts of calcium carbonate, 2 parts of cationic compounds, 1 part of anionic polysaccharides, 0.5 parts to 80 parts of wood pulp The fiber dispersant and 0.5 parts of dry strength agent are mixed and mixed evenly to obtain the drum paper slurry;

[0032] (2) Scooping and forming: the drum paper slurry obtained in step (1) is subjected to screen scooping, squeezing and dewatering 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 in the hot press mold, and perform hot press drying at a temperature of 175°C for 55 seconds to obtain paper;

[0034] (4) Punching: punching and forming the paper obtained in step (3) to obtain ...

Example Embodiment

[0036] Example 2

[0037] Semi-loosely pressed whole paper drum paper, prepared by a method including the following steps:

[0038] (1) Preparation of pulp: crush, beat, and bleach the wood raw materials to a beating degree of 30°SR to obtain wood pulp. According to the weight ratio, add 5 parts of titanium dioxide, 10 parts of calcium carbonate, 3 parts to 120 parts of wood pulp. 1 parts of cationic compound, 2 parts of anionic polysaccharide, 1.5 parts of fiber dispersant and 1.5 parts of dry strength agent are prepared for slurrying, and the drum paper slurry is obtained by stirring evenly;

[0039] (2) Scooping and forming: the drum paper slurry obtained in step (1) is subjected to screen scooping, squeezing and dewatering 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 in the hot press mold, and perform hot press drying at a temperature of 185°C for 65 seconds to obtain paper;

[...

Example Embodiment

[0043] Example 3

[0044] Semi-loosely pressed whole paper drum paper, prepared by a method including the following steps:

[0045] (1) Preparation of pulp: the wood raw materials are broken down, beating, and bleached to obtain wood pulp with a beating degree of 35°SR. The concentration of the wood pulp is 3.8%, and 3 is added to 100 parts of wood pulp according to the weight ratio. 1 parts 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 compounds, 1.5 parts of anionic polysaccharides, 1.5 parts of fiber dispersing agent and 1.5 parts of dry strength agent for slurrying, mixing uniformly Drum paper pulp

[0046] (2) Dripping and forming: The drum paper slurry obtained in step (1) is subjected to screen drooping, and then the drooping slurry is heated by saturated steam for 10 minutes, and then squeezed and dehydrated to obtain dehydrated paper. The humidity of the dehydrated paper Is 36%;...

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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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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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