Cooking process for carrying out composite modification on natural color bamboo paper pulp and cotton paper pulp to form dissolving pulp

A composite modified bamboo pulp technology, applied in the field of dissolving pulp, can solve the problems of low individuality, high production cost, and monotonous performance, and achieve the effects of less manual use, avoiding undercooking, and low manufacturing cost

Inactive Publication Date: 2012-09-19
YIBIN GRACE GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the bamboo pulp prepared by this invention has the following disadvantages: 1, the yield is low, and the highest yield is only 85%
2. The α-cellulose content fluctuates greatly, from 85% to 95%, which makes the modified bamboo pulp α-cellulose content unstable
3. The average length of fibers is lower than that of paper-making wood fibers, and the content of ash and polypentose in the production process is high, and the bamboo fibers are hard, have more thick-walled fibers, narrow cell lumens, dense fiber tissues, and the presence of air in the cells leads to dissolution Difficult, large amount of chemicals
4. The viscose fiber produced by a single bamboo pulp has monotonous performance and does not show individuality
But this invention is

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Example 1

[0035] A, cotton pulp preparation

[0036] Disperse the cotton pulp board with a dispersing device such as a bulk bag machine, a meal feeder, a blade knife, etc., use cutting equipment and crushing equipment such as a pulper, a shredder to crush the pulp board into flocs, and use conveying equipment (Fan, cyclone separator, screw conveyor) The flocculent cotton pulp board is sent into the steamer, and the NaOH solution is added while putting the cotton pulp board into the steamer. This preparation method is called dry preparation in the art. The cotton pulp bank of this embodiment adopts this material preparation method for material preparation.

[0037] The specific process requirements of cotton pulp preparation in this embodiment are as follows:

[0038] 1. Cotton pulp board specification: 600×800mm.

[0039] 2. Feeding speed: 60~100Kg / min.

[0040] 3. Feeding frequency of crusher: <5 sheets / time.

[0041] 4. Fiber length after crushing: length>1.5mm.

[0042] 5. P...

Example Embodiment

[0096] Example 2

[0097] A. Material preparation of cotton pulp;

[0098] The preparation method and requirements of the cotton pulp in this example are the same as those in Example 1.

[0099] B. Separate cooking of cotton pulp:

[0100] The separate cooking method of cotton pulp in this embodiment is the same as that in embodiment 1.

[0101] C. Natural bamboo pulp board preparation

[0102] The requirements of this step are the same as in Example 1.

[0103] D. Two kinds of pulp board composite:

[0104] Use a screw conveyor or belt conveyor to feed the cotton pulp board in step B and the natural bamboo pulp board in step C into the continuous digester, and the compound ratio of the natural bamboo pulp: cotton pulp = 10%: 90%.

[0105] E. Two kinds of pulp composite cooking:

[0106] Use a screw conveyor or a belt conveyor to send the flocculent composite pulp board produced in step D to a continuous digester for cooking. When cooking, feed the raw materials into the pre-reaction silo, ...

Example Embodiment

[0117] Example 3

[0118] A, cotton pulp preparation

[0119] The preparation method and requirements of the cotton pulp in this example are the same as those in Example 1.

[0120] B. Separate cooking of cotton pulp:

[0121] The separate cooking method of cotton pulp in this embodiment is the same as that in embodiment 1.

[0122] C. Natural bamboo pulp board preparation:

[0123] The preparation of natural bamboo pulp board in this example is the same as that in example 1.

[0124] D. Two kinds of pulp board composite:

[0125] Use a screw conveyor or belt conveyor to feed the cotton pulp board in step B and the natural bamboo pulp board in step C into the continuous digester, and the compound ratio of the natural bamboo pulp: cotton pulp = 10%: 90%.

[0126] E. Two kinds of pulp composite cooking:

[0127] Use a screw conveyor or a belt conveyor to send the flocculent composite pulp board produced in step D to a continuous digester for cooking. When cooking, feed the raw materials into ...

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Abstract

The invention discloses a cooking process for carrying out composite modification on natural color bamboo paper pulp and cotton paper pulp to form dissolving pulp. The cotton paper pulp is fed into a digester by a conveyor to be separately cooked; the cooked cotton paper pulp is compounded with the natural color bamboo paper pulp which is subjected to material preparation; the composite paper pulp is fed into a continuous digester to be cooked; a continuous steaming pipe of the continuous digester is provided with three sections; the section connected with a pre-reaction bin is provided with a steam pipe and a T-shaped pipe; the other two sections are provided with steam pipes; steam is filled into the continuous digester through the steam pipes; and alkali liquor is added into the continuous steaming pipe by the T-shaped pipe. According to the invention, the natural color bamboo paper pulp and the cotton paper pulp are used as the raw materials, so that the cost of preparing the dissolving pulp is reduced to a great extent and the quality requirement of the dissolving pulp for viscose is also met.

Description

technical field [0001] The present invention relates to a method for compound modification of natural bamboo pulp and cotton pulp into dissolving pulp, in particular to a process for compound modification of natural color bamboo pulp and cotton pulp into dissolving pulp, wherein dissolving pulp refers to pulp for viscose fiber, Cellulose and cellulose derivatives. Background technique [0002] The application number is 200710050470.9, the authorized announcement number is CN101158125, and the authorized announcement date is April 9, 2008. The Chinese invention patent discloses a paper-making grade coniferous wood pulp board modification process, wherein the cooking process uses paper-making grade wood pulp board Use caustic soda method, sulfate method or sulfite method for cooking, and the cooking agents are NaOH, NaOH+Na 2 S, Na 2 SO 3 + NaOH, the process conditions are: 1. The total alkali concentration of the cooking liquid by the caustic soda method and the sulfate m...

Claims

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Application Information

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IPC IPC(8): D21C3/04D21H11/20
Inventor 薛勤徐发祥于渭东谢鹏刘爱兵杨大平竭发全
Owner YIBIN GRACE GROUP CO LTD
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