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Method for preparing fluff pulp from bamboos and fluff pulp prepared by method

A technology of fluff pulp and bamboo, which is applied in the field of fluff pulp, can solve the problems of high content of DCM extract, increased consumption of chemicals, and no fiber length in bamboo fluff pulp, so as to protect forests, improve resource utilization, reduce Effect of Viscosity and Ash Content

Active Publication Date: 2022-07-01
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is carried out alkali treatment and purification to pulp after bleaching, and its process chemical consumption increases, and process cost can be increased, and the content of DCM extract of the obtained bamboo fluff pulp is relatively high, and tightness is relatively large, and whiteness is on the low side, The dry bulkiness is relatively small, and there are no key indicators such as fiber length and number of fibers per gram of pulp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A method of utilizing bamboo to prepare fluff pulp, comprising the following steps:

[0059] (1) Alkali treatment of bamboo shoots: use 60g / L sodium hydroxide solution to process 100kg absolutely dry bamboo chips in a cooking pot at 60°C, and every kilogram of dried bamboo chips is 60g / L of hydrogen peroxide with a concentration of 5L. Sodium solution, treatment time is 2 hours to obtain treatment solution;

[0060] (2) Separation of the treatment liquid: The treatment liquid in step (1) is first replaced by dilute black liquor, and the replaced treatment liquid is separately stored in a container for use.

[0061] (3) Cooking of the treated bamboo chips: replace the dilute black liquor with 120 ℃ warm black liquor, the dilute black liquor enters the original dilute black liquor tank, and then replace the warm black liquor with 150 ℃ hot black liquor, and the warm black liquor enters the warm black liquor After the replacement is completed, add white liquor for cooking...

Embodiment 2

[0070] A method of utilizing bamboo to prepare fluff pulp, comprising the following steps:

[0071] (1) Alkali treatment of bamboo shoots: use 80g / L sodium hydroxide solution to process 100kg absolutely dry bamboo chips in a cooking pot at 90°C, and use 3L of hydrogen peroxide with a concentration of 80g / L for every kilogram of dried bamboo chips. Sodium solution, treatment time is 1.5 hours to obtain treatment solution;

[0072] (2) Separation of the treatment liquid: The treatment liquid in step (1) is first replaced by dilute black liquor, and the replaced treatment liquid is separately stored in a container for use.

[0073] (3) Cooking of the treated bamboo chips: replace the dilute black liquor with 120 ℃ warm black liquor, the dilute black liquor enters the original dilute black liquor tank, and then replace the warm black liquor with 150 ℃ hot black liquor, and the warm black liquor enters the warm black liquor After the replacement is completed, add white liquor for ...

Embodiment 3

[0082] A method of utilizing bamboo to prepare fluff pulp, comprising the following steps:

[0083] (1) Alkali treatment of bamboo shoots: use 100g / L of sodium hydroxide solution to treat 100kg of dried bamboo chips at 80°C in a cooking pot, and use 4L of hydrogen peroxide with a concentration of 100g / L for every kilogram of dried bamboo chips. Sodium solution, treatment time is 1 hour to obtain treatment solution;

[0084] (2) Separation of the treatment liquid: The treatment liquid in step (1) is first replaced by dilute black liquor, and the replaced treatment liquid is separately stored in a container for use.

[0085] (3) Cooking of the treated bamboo chips: replace the dilute black liquor with 120 ℃ warm black liquor, the dilute black liquor enters the original dilute black liquor tank, and then replace the warm black liquor with 150 ℃ hot black liquor, and the warm black liquor enters the warm black liquor After the replacement is completed, add white liquor for cookin...

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Abstract

The invention discloses a method for preparing fluff pulp from bamboos and the fluff pulp prepared by the method. The method comprises the following steps: treating bamboos with concentrated alkali at a relatively mild temperature for a certain period of time, replacing a treating fluid with dilute black liquor, separating hemicelluloses by using the treating fluid, cooking the treated bamboos by using a sulfate process to obtain unbleached bamboo pulp, screening coarse residues from the unbleached bamboo pulp by using a slotted screen, screening impurity cells from the unbleached bamboo pulp by using a microporous screen, and drying the unbleached bamboo pulp to obtain the bamboo pulp. And carrying out two-stage oxygen delignification on the screened pulp, and then carrying out ECF bleaching treatment with the flow of D0EpD1P to finally obtain the bamboo fluff pulp which is high in whiteness, low in DCM extract content, low in ash content, longer in fiber length, 4.2-4.6 million in fiber number per gram of paper pulp and higher in bulk.

Description

technical field [0001] The invention belongs to the scientific field of biomass refining and pulping and papermaking, and particularly relates to a method for preparing fluff pulp by utilizing bamboo and the prepared fluff pulp. Background technique [0002] Fluff pulp is an absorbent core pulp used for disposable hygiene products. Disposable hygiene products include absorbent hygiene products and wipes. Absorbent hygiene products include baby diapers, sanitary napkins, and adult incontinence products. Wipes are divided into dry wipes. Wipes and wet wipes. [0003] Bamboo fiber is a medium and long fiber, its length is between softwood pulp and hardwood pulp, and the fiber aspect ratio is between 110-140, which is better than hardwood, similar to softwood, and has good pulping and papermaking characteristics. , is one of the best non-wood paper fiber raw materials. The bamboo felling cycle is 2-3 years. It belongs to fast-growing plants. According to the data, the bamboo fo...

Claims

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Application Information

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IPC IPC(8): D21H11/12D21C3/02D21C9/10D21C9/14D21C9/147C08B37/14
CPCD21H11/12D21C3/022D21C9/1057D21C9/144D21C9/147C08B37/0057C08B37/0003Y02W30/64
Inventor 雷以超王梦迪李海龙胡健
Owner SOUTH CHINA UNIV OF TECH
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