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Method for preparing alkali cellulose and viscose spinning adhesive from semi-wet slurry

A technology of alkali cellulose and wet pulp, which is applied in the preparation of alkali cellulose, new semi-wet pulp and viscose fiber spinning solution, can solve the problems of high energy consumption and complex alkali cellulose process, and can achieve equipment The effect of reducing the cost of transformation, changing the process flow and saving labor

Active Publication Date: 2017-05-31
山东银鹰化纤有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method reduces the drying process in the pulp preparation process, the process in the alkali cellulose preparation process is complicated, and it needs to be squeezed and crushed three times.
When docking with the current traditional viscose production line, it is necessary to add new pressing and crushing equipment, which requires a large process change and equipment transformation, as well as a long-distance fluid slurry transportation, which consumes a lot of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A kind of semi-wet pulp prepares the preparation method of alkali cellulose and viscose spun glue, described preparation method comprises the following steps:

[0030] Porridge prepared from cotton linters and coniferous wood enters the pulping box at a ratio of 6:4, and the composition of the porridge is further mixed and adjusted to make its components uniform and stable;

[0031] The porridge from the pulping box is transported to the wet part of the pulp machine through the pulp pump, and in the wet part of the pulp machine, it passes through the fourdrinier water filtration, the dehumidification of the six vacuum suction boxes, and the high extrusion of the three presses to make a water-containing porridge. It is 41% semi-dry pulp, and then enters the screw pulverizer to pulverize the pulp into fluffy and small powder-like semi-wet pulp with a large surface area;

[0032] The semi-wet pulp is accurately metered and belt-transported into the dipping tank for lye dip...

Embodiment 2

[0038] A kind of semi-wet pulp prepares the preparation method of alkali cellulose and viscose spun glue, described preparation method comprises the following steps:

[0039] Raw materials for pulping are cotton linters and bamboo wood. Cotton pulp accounts for 60% of the prepared pulp porridge and bamboo pulp accounts for 40%. Uniform and stable;

[0040] The porridge from the pulping box is transported to the wet part of the pulp machine through the pulp pump, and in the wet part of the pulp machine, it passes through the fourdrinier water filtration, the dehumidification of the six vacuum suction boxes, and the high extrusion of the three presses to make a water-containing porridge. It is 44% semi-dry pulp, and then enters the screw pulverizer to pulverize the pulp into fluffy and small powder-like semi-wet pulp with a large surface area;

[0041] The semi-wet pulp is accurately metered and belt-transported into the dipping tank for lye dipping. The dipping temperature is ...

Embodiment 3

[0047] A kind of semi-wet pulp prepares the preparation method of alkali cellulose and viscose spun glue, described preparation method comprises the following steps:

[0048] Raw materials for pulping are cotton linters, broad-leaved wood and plant straw. In the prepared porridge, cotton pulp accounts for 60%, broad-leaf pulp accounts for 20%, and straw pulp accounts for 20%. The composition of porridge is further mixed and adjusted to make its components uniform and stable;

[0049] The porridge from the pulping box is transported to the wet part of the pulp machine through the pulp pump, and in the wet part of the pulp machine, it passes through the fourdrinier water filtration, the dehumidification of the six vacuum suction boxes, and the high extrusion of the three presses to make a water-containing porridge. It is 39% semi-dry pulp, and then enters the screw pulverizer to pulverize the pulp into fluffy and small powder-like semi-wet pulp with a large surface area;

[005...

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Abstract

The invention relates to a method for preparing alkali cellulose and viscose spinning adhesive from semi-wet slurry. The preparation method comprises the following steps: mixing, filtering water with a fourdrinier wire, dehumidifying, extruding, grinding, immersing for the first time, squeezing for the first time and grinding, immersing for the second time, squeezing for the second time and grinding, performing belt-type aging, yellowing, carrying out post-dissolving, mixing, filtering and defoaming so as to complete spinning adhesive preparation. According to the preparation method, pumping, drying, slitting and other production links during pulp preparation can be reduced, and the preparation can be completed by twice squeezing and grinding of pulp slush, the process is simple, the process flow becomes smaller, no new squeezing or grinding equipment is required, cost for reforming equipment is greatly reduced, conveying of fluid slurry is greatly reduced, energy consumption is greatly reduced, labor is saved, and technical grafting and transformation on an existing viscose fiber production line can be facilitated.

Description

technical field [0001] The invention relates to the field of viscose fiber production, in particular to the preparation of a novel semi-moist pulp and a new method for using the semi-moist pulp to realize the preparation of alkali cellulose and viscose fiber spinning solution. Background technique [0002] Since the industrialization of viscose fiber in 1905, people have been following the physical process of removing impurities, purifying, depolymerizing, bleaching, drying, and cutting natural plants rich in cellulose, such as cotton linters, wood, bamboo, and bagasse. Chemical method, prepare cellulose pulp with low water content and high purity, then impregnate and alkalinize the pulp to make alkali cellulose, and then carry out yellowing, dissolving, filtering, degassing and other processes on the alkali cellulose to obtain spinning Liquid, and finally adopt the wet spinning process to obtain the traditional process of viscose fiber. Although this traditional process ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/08C08B1/08
CPCC08B1/08D01F2/08
Inventor 李勇徐元斌陈忠国马峰刚曹知鹏王永敏
Owner 山东银鹰化纤有限公司
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