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Method for analyzing beating performance of wood sulfate pulp

A kraft pulp and beating performance technology, which is applied in the field of pulp beating performance analysis, can solve the problems of cumbersome analysis and measurement procedures, and achieve the effects of easy popularization and application, improved comprehensive utilization value, and simple and fast procedures

Inactive Publication Date: 2011-04-27
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method has the problem of cumbersome analysis and determination procedures in actual production

Method used

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  • Method for analyzing beating performance of wood sulfate pulp
  • Method for analyzing beating performance of wood sulfate pulp
  • Method for analyzing beating performance of wood sulfate pulp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Adopt conventional analysis method to analyze the bleached kraft pulp of Acacia lobosa hardwood through beating, first use the Schopper-Riegler beating degree meter to measure the degree of beating as 36 ° SR, and then measure the fiber characteristic parameters with a microscope as the number average fiber length is 0.608mm, and the width is 0.608 mm. The water retention value is 20.5 μm, and the water retention value is measured by a centrifuge to be 181%, and then the sheet is copied on a paper sheet machine, and the physical strength index of the pulp is measured by a paper physical strength tester. The fracture length is 4.14km, and the tear index is 12.37mN m 2 g -1 , burst resistance index 3.74kPa m 2 g -1 , The folding number is 78. The above analysis tests can confirm that the beating process is more suitable, the physical strength index of the pulp is better, and the drainage of the pulp is also better.

[0051] The beating performance of the bleached kraf...

Embodiment 2

[0053] Adopt conventional analysis method to analyze the softwood bleached kraft commercial pulp (Lion brand) through beating, first use the Schopper-Riegler type beating degree meter to measure the beating degree to be 40 ° SR, then record the fiber characteristic parameter as the number-average fiber length of 1.179mm, the width is 25.5μm, and the water retention value is measured by a centrifuge to be 142%, and then the sheets are copied on a paper sheet machine, and the physical strength index of the pulp is measured by a paper physical strength tester. The fracture length is 5.41km, and the tear Crack index 16.51mN·m 2 g -1 , burst resistance index 5.09kPa·m 2 g -1 , The number of folding endurance is 112. The above analysis tests can confirm that the beating process is more suitable, the physical strength index of the pulp is better, and the drainage performance of the pulp is also better.

[0054] The beating performance of softwood bleached kraft pulp (Lion brand) ...

Embodiment 3

[0056] The fast-growing poplar bleached kraft pulp (hardwood) made by the laboratory was analyzed by conventional analysis methods. The beating degree was first measured by the Schopper-Riegler type beating degree meter to be 42°SR, and then the fiber characteristic parameters were measured by the microscope. The average fiber length is 0.572mm, the width is 22.5μm, and then the water retention value is measured by a centrifuge to be 192%, and then the sheet is made on a paper sheet machine, and the physical strength index of the pulp is measured by a paper physical strength tester. 7.09km, tear index 10.98mN m 2 g -1 , burst index 3.05kPa·m 2 g -1 , The number of folding endurance is 109. The above analysis tests can confirm that the beating process is more suitable, the physical strength index of the pulp is better, and the drainage of the pulp is also better.

[0057]The beating performance of the fast-growing poplar bleached kraft pulp (hardwood) after beating is measu...

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Abstract

The invention relates to a method for analyzing beating performance of wood sulfate pulp. Pulp fiber characteristic parameters are measured: for needle leaf wood sulfate pulp, the number average length Ln is 1.129 to 1.257mm, the weight average length Lw is 1.673 to 1.855mm, the width is 24.8 to 26.1 mu m, fine fiber content is 47.30 to 54.42 percent, the average crimp index is 0.134 to 0.197, the number of kinks per millimeter of fiber is 1.130 to 1.249, and the beating performance is high; and for broadleaf wood sulfate pulp, the number average length Ln is 0.519 to 0.632 mm, the weight average length Lw is 0.586 to 0.681mm, the width is 19.0 to 24.6 mu m, the fine fiber content is 34.97 to 56.26 percent, the average crimp index is 0.079 to 0.106, the number of kinks per millimeter of fiber is 1.065 to 1.139, and the beating performance is high. By the method, the defect of complex steps of the conventional analysis technology is overcome, the method is convenient and fast, and the analysis time is shortened.

Description

technical field [0001] The invention relates to an analysis method for the beating performance of pulp, in particular to an analysis method for the beating performance of wood kraft pulp. Background technique [0002] In recent years, due to environmental protection, sustainable development and the needs of enterprises to adjust product structure, the structure of domestic papermaking raw materials has undergone great changes, mainly manifested in a greatly reduced proportion of non-wood fiber pulp, waste paper pulp and wood fiber pulp. The increase in ratio is quite significant. The proportion of wood pulp in papermaking raw materials has greatly increased, and the research on the beating properties of wood pulp is of great significance for guiding papermaking production. [0003] The pulp fiber sent by the pulping section is stiff and inelastic, so it is difficult for the fiber to form a uniformly distributed paper sheet on the wire, and the strength of the paper is low. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/34
Inventor 杨桂花陈嘉川汪运涛孔凡功
Owner QILU UNIV OF TECH
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