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Pulping process of high-cleanliness primary-color bamboo pulp

A high cleanliness, bamboo pulp technology, applied in pulp beating method, non-fiber pulp addition, fiber raw material processing and other directions, can solve the problems of easy transverse cutting, loss of pulp strength, and fiber hardening, etc., to improve softness. and strength, ensure the cleanliness of the paper surface, and the effect of good beating uniformity

Inactive Publication Date: 2019-05-03
CHONGQING LIWEN SANITARY PAPER MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Bamboo pulp fiber is easy to cut horizontally due to its hard fiber and thick wall, and its high content of hemicellulose, so it is easy to hydrate during beating treatment, and the beating degree is easy to increase. Therefore, it is difficult to use bamboo pulp to make high-grade household paper. Good softness and feel
In addition, the high-end household paper uses primary-color bamboo pulp, which means that compared with bleached bamboo pulp, due to the lack of strong bleaching process, it is impossible to complete the bleaching of dark fibrous impurities in the fibers, and dark fibrous impurities will appear in the finished paper. On the other hand, during the refining process, most of the pulp is refined by high-consistency refiners. If only low-consistency beating is used, the strength of the pulp itself will drop too much due to the strong cutting of fibers. , and because of the high degree of beating, the power consumption is also large, and the pulp fibers cannot be dispersed into agglomerated fibers. In addition, when the screw conveying equipment is used to feed pulp to the high-consistency refiner, the pressure is often unstable, and it is difficult to ensure the uniformity of the high-consistency refiner. Refining

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The pulping process of a kind of high-cleanliness primary color bamboo pulp of the present embodiment comprises the following steps:

[0034] Step a, transport the bamboo pulp to the pulp tower with softening liquid and fully soak and stretch for 24 hours, the amount of softening liquid is 20g / L to mix the pulp, then wash and dehydrate, separate the softening liquid, and obtain fully stretched pulp material;

[0035] The softening liquid is made by mixing the following raw materials in mass percentage:

[0036] Sodium peroxide 15%

[0037] Sodium sulfite 2%

[0038] Disodium edetate 0.15%

[0039] Sodium di-sec-octyl sulfonate maleate 1.2%

[0040] water balance.

[0041] Step b. The fully moistened pulp is first deslagged by a high-consistency slag remover, and then processed by a thickening device to make the concentration of the pulp reach 23%, and then transported to a high-consistency refiner for high-consistency beating, and at the same time, add a concentrat...

Embodiment 2

[0049] The pulping process of a kind of high-cleanliness primary color bamboo pulp of the present embodiment comprises the following steps:

[0050] Step a, transport the bamboo pulp to the pulp tower with softening liquid and fully soak and stretch for 28 hours. The amount of softening liquid is 16g / L to mix the pulp, then wash and dehydrate, separate the softening liquid, and obtain fully stretched pulp material;

[0051] The softening liquid is made by mixing the following raw materials in mass percentage:

[0052] Sodium peroxide 17%

[0053] Sodium sulfite 1%

[0054] Disodium edetate 0.1%

[0055] Sodium di-sec-octyl sulfonate maleate 1.5%

[0056] water balance.

[0057] Step b. The fully moistened pulp is firstly deslagged by a high-consistency slag remover, and then processed by a thickening device to make the concentration of the pulp reach 20%, and then transported to a high-consistency refiner for high-consistency beating, and at the same time, add a concentra...

Embodiment 3

[0065] The pulping process of a kind of high-cleanliness primary color bamboo pulp of the present embodiment comprises the following steps:

[0066] Step a, transport the bamboo pulp to the pulp tower with softening liquid and fully soak and stretch for 36 hours, the amount of softening liquid is 10g / L to mix the pulp, then wash and dehydrate, separate the softening liquid, and obtain fully stretched pulp material;

[0067] The softening liquid is made by mixing the following raw materials in mass percentage:

[0068] Sodium peroxide 18%

[0069] Sodium sulfite 3%

[0070] Disodium edetate 0.25%

[0071] Sodium di-sec-octyl sulfonate maleate 0.5%

[0072] water balance.

[0073] Step b. The fully moistened slurry is firstly deslagged by a high-consistency slag remover, and then processed by a thickening device to make the concentration of the slurry reach 25%, and then transported to a high-consistency refiner for high-consistency beating. At the same time, add a concentr...

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PUM

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Abstract

The invention relates to the technical field of household paper, in particular to a pulping process of high-cleanliness primary-color bamboo pulp, the process comprises the following steps: fully soaking and moistening bamboo pulp, carrying out high-concentration pulping by using a high-concentration pulping machine, carrying out low-concentration grinding by using a low-concentration grinding machine, carrying out coarse screening, two-section pressure screen fine screening and grading screening treatment to obtain long-fiber pulp and short-fiber pulp, and finally, mixing 50-90% of the long-fiber pulp and 10-50% of the short-fiber pulp to prepare pulp, adding a certain amount of a softening agent and a wet strength agent, and uniformly mixing to obtain the high-cleanliness primary- colorbamboo pulp. According to the process, redundant fibrous impurities can be removed so as to ensure the paper surface cleanliness, the pulping uniformity is good, and the strength, the softness and thehand feeling of domestic paper are improved.

Description

technical field [0001] The invention relates to the technical field of household paper, in particular to a pulping process of high-cleanness primary-color bamboo pulp. Background technique [0002] Bamboo pulp fiber is easy to cut horizontally due to its hard fiber and thick wall, and its high content of hemicellulose, so it is easy to hydrate during beating treatment, and the beating degree is easy to increase. Therefore, it is difficult to use bamboo pulp to make high-grade household paper. Better softness and feel. In addition, the high-end household paper uses primary-color bamboo pulp, which means that compared with bleached bamboo pulp, due to the lack of strong bleaching process, it is impossible to complete the bleaching of dark fibrous impurities in the fibers, and dark fibrous impurities will appear in the finished paper. On the other hand, during the refining process, most of the pulp is refined by high-consistency refiners. If only low-consistency beating is use...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C9/00D21D1/02D21H17/00D21H15/10D21H15/06D21H15/02D21D5/02D21H21/14D21H21/20D21H11/18D21H11/12
Inventor 李文俊
Owner CHONGQING LIWEN SANITARY PAPER MFG CO LTD
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