Preparation method of mulberry bark fibers

A mulberry fiber and pretreatment technology, which is applied in the direction of producing bast fiber by chemical method, can solve the problems of destroying the structure of mulberry fiber, long process flow, environmental pollution, etc.

Active Publication Date: 2014-09-10
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

Most of these methods adopt the second cooking method, which has the disadvantage of excessive degumming, which destroys the structure of the mulberry fiber, has more short fibers, makes the fiber surface rough, has poor spinnability, low production rate, and has a lo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The mulberry bark is preliminarily removed from impurities, tied into a cage, and then soaked in a sulfuric acid solution with a bath ratio of 1:10, where the concentration of sulfuric acid is 3g / L, treated at room temperature for 30min, and then heated at 1°C / min Treat at 40°C for 30 minutes, then heat at 1°C / min to 60°C, and then treat for 60 minutes; wash with water until neutral. Then put it into the alkali-oxygen treatment solution, wherein the concentration of hydrogen peroxide is 30% hydrogen peroxide 40g / L, sodium borohydride 3g / L, sodium pyrophosphate 1g / L, the temperature is raised to 70°C at 1°C / min, and the treatment time is 45min. After the completion, proceed to supercritical carbon dioxide fluid degumming treatment, put the mulberry fiber into the supercritical fluid treatment device, first treat it at a pressure of 18MPa and a temperature of 110°C for 10 minutes, and then treat it at a pressure of 12MPa and a temperature of 100°C for 10 minutes , and th...

Embodiment 2

[0030] The mulberry bark is preliminarily removed from impurities, tied into a cage, and then soaked in a sulfuric acid solution with a bath ratio of 1:10, where the concentration of sulfuric acid is 5g / L, treated at room temperature for 20min, and then heated at 1°C / min Treat at 40°C for 30 minutes, then heat at 1°C / min to 60°C, and then treat for 60 minutes; wash with water until neutral. Then put it into the alkali-oxygen treatment solution, in which the hydrogen peroxide concentration is 30% hydrogen peroxide 60g / L, sodium borohydride 2g / L, sodium pyrophosphate 2g / L, 1°C / min heating temperature is 75°C, treatment time is 45min . After the completion, proceed to supercritical carbon dioxide fluid degumming treatment, put the mulberry fiber into the supercritical fluid treatment device, first treat it at a pressure of 18MPa and a temperature of 120°C for 10 minutes, and then treat it at a pressure of 12MPa and a temperature of 120°C 10min, and then under the condition of pr...

Embodiment 3

[0033] The mulberry bark is preliminarily removed from impurities, tied into a cage, and then soaked in a sulfuric acid solution with a bath ratio of 1:15, where the concentration of sulfuric acid is 5g / L, treated at room temperature for 30min, and then heated at 1°C / min Treat at 40°C for 30 minutes, then heat at 1°C / min to 60°C, and then treat for 60 minutes; wash with water until neutral. Then put it into the alkali-oxygen treatment solution, wherein the concentration of hydrogen peroxide is 30% hydrogen peroxide 50g / L, sodium borohydride 25g / L, sodium pyrophosphate 1g / L, the temperature is raised to 60°C at 1°C / min, and the treatment time is 45min. After the completion, proceed to supercritical carbon dioxide fluid degumming treatment, put the mulberry fiber into a supercritical fluid treatment device, first treat it at a pressure of 18MPa and a temperature of 100°C for 10 minutes, and then treat it at a pressure of 12MPa and a temperature of 100°C 10min, and then under th...

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Abstract

A preparation method of mulberry bark fibers includes the steps of roguing, binding, caging, chemical pretreatment, supercritical carbon dioxide fluid degumming treatment and biological enzyme degumming treatment, washing, dehydration, oil feed, carding and drying, wherein the chemical pretreatment method includes pickling treatment and alkali oxygen treatment. The mulberry bark fibers prepared through the preparation method are high in degumming rate, low in damage, high in performance and capable of meeting the requirement for modern environment friendliness.

Description

[0001] technical field [0002] The invention belongs to the technical field of preparation of mulberry fiber. Background technique [0003] my country is a big country of sericulture, with an area of ​​8 million mu of mulberry fields in the country, and the output of mulberry fiber can reach 800,000 tons per year. The research and development of natural mulberry bark fiber for textile materials can not only comprehensively utilize domestic discarded mulberry bark resources to realize waste utilization, but also increase farmers' income, which has great social and economic benefits. [0004] Mulberry bark contains a variety of fibers, and the content of fat meal, hemicellulose, lignin and other components is similar to that of some bast fibers, while the content of pectin is much higher than that of other bast fibers. It can be seen that the main object of chemical degumming of mulberry fiber is the pectin component. The preparation of mulberry fiber is through degumming o...

Claims

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Application Information

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IPC IPC(8): D01C1/02
Inventor 耿云花
Owner 山东银鹰化纤有限公司
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