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A Pulping Technology of Thin Paper with High Evenness and High Strength

A high-strength, thin paper technology, applied in the field of papermaking, can solve the problems of failing to give full play to serial mixing and beating, unable to cut fibers and achieve the best effect of splitting, and achieve high strength and uniformity. the effect of strength

Active Publication Date: 2017-01-04
浙江佳维康特种纸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the conventional tandem beating process, the tandem disc mills and beating process parameters are also the same, and the effect of fiber cutting and fiber separation cannot be achieved at the same time, and the effect of series mixing and beating cannot be fully utilized.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Mix and disintegrate 50 parts by weight of long-fiber pulp and 50 parts of short-fiber wood pulp at 40°C, and remove coarse fibers through a disintegrator to obtain a pulp with a diameter of less than 1 mm, and adjust the pulp with sodium hydroxide PH to 7, and then through four different disc mills in series to mix and beat, the beating degree is 60°SR, and then go through pulp blending, pulping, sand removal, screening, and then online papermaking and other processes to make thin paper.

[0020] In this embodiment, the first disc mill among the four disc mills is a high-strength nodular alloy disc with a tooth width and groove width of 3 mm, a disc gap of 0.10 mm, and a beating pulp pressure of 0.13 mm. MPa, the beating concentration is 4.5%; the second disc mill disc in the four disc mills is a high-strength nodular alloy disc with a tooth width and a groove width of 3mm, and a slurry block is set up, and the disc gap is 0.20 mm, the beating pulp pressure is 0.20MPa,...

Embodiment 2

[0024] Mix and disintegrate 55 parts by weight of long-fiber wood pulp and 45 parts of short-fiber wood pulp at 43°C, and remove coarse fibers through a disintegrator to obtain fiber bundles with a particle size of 0.8mm, which are adjusted by potassium hydroxide The slurry has a pH of 7.2, and is mixed and beaten by four different disc mills in series, with a beating degree of 60°SR, and then processed through pulping, pulping, sand removal, screening, and then online papermaking and other processes to produce thin paper.

[0025] In this embodiment, the first disc mill among the four disc mills is a high-strength nodular alloy disc with a tooth width and a groove width of 3.5 mm, the disc gap is 0.12 mm, and the beating pulp pressure is 0.14MPa, the beating concentration is 4.8%; the second disc mill disc among the four disc mills is a high-strength nodular alloy disc with a tooth width and a groove width of 3.5mm, and a slurry block is set up, and the disc gap 0.22mm, the b...

Embodiment 3

[0029] Mix and disintegrate 60 parts by weight of long-fiber wood pulp and 40 parts of short-fiber wood pulp at 45°C, and remove coarse fibers through a disintegrator to obtain fiber bundles with a particle size of 0.8mm, which are adjusted by potassium hydroxide The slurry has a pH of 7.5, and is then mixed and beaten by four different disc mills in series, with a beating degree of 60°SR, and then processed through pulping, pulping, sand removal, screening, and then online papermaking and other processes to produce thin paper.

[0030] In this embodiment, the first disc mill among the four disc mills is a high-strength nodular alloy disc with a tooth width and groove width of 4 mm, a disc gap of 0.15 mm, and a beating pulp pressure of 0.15 mm. MPa, the beating concentration is 5.0%; the second disc mill disc in the four disc mills is a high-strength nodular alloy disc with a tooth width and a groove width of 4 mm, and a slurry block is set up, and the disc gap is 0.25 mm. mm,...

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Abstract

The invention relates to a high evenness high strength thin type paper pulping technology; the features are that 50-60 weight parts of long fiber wood pulp and 40-50 weight parts of short fiber wood pulp are re-pulped under 40-45 DEG C; a fluffer removes crude fibers so as to obtain a fiber beam with granularity <=1mm; alkali is added in the slurry so as to adjust a PH value to be 7-7.5; four different grinding disc combinations and different pumping technical parameters are mixed for pumping. The pumping technology can fully cut the fibers and realize devillicate brooming, thus generating thin type paper with high mechanical strength and evenness.

Description

technical field [0001] The invention relates to a pulping process for thin paper with high uniformity and high strength, belonging to the technical field of papermaking. Background technique [0002] Beating is a process of physical and mechanical treatment of pulp fibers suspended in water to obtain some specific properties of pulp and make the produced paper reach the required quality indicators. Pulping is an important process in the papermaking process, which directly affects paper quality, production efficiency and energy consumption. [0003] During the beating process, the fibers mainly undergo the displacement and deformation of the cell wall, the breaking of the outer layer of the primary wall and the secondary wall, the water absorption swelling and fibrillation of the fiber, transverse cutting, crushing, kneading, etc., and these effects in beating The whole process happens simultaneously, not in isolation. The beating method that mainly cuts fibers horizontally...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21D1/30
Inventor 黄建荣林宏方丽珍
Owner 浙江佳维康特种纸有限公司
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