Measuring method for viscosity of alkali cellulose

A viscosity measurement and alkali fiber technology, which is applied in the field of alkali fiber viscosity measurement, can solve the problems of inaccurate alkali fiber viscosity measurement, etc., and achieve the effects of shortening the oscillation time, good dispersion state, and high measurement accuracy

Inactive Publication Date: 2011-03-30
YIBIN HIEST FIBER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to overcome the inaccurate defect of the alkali fiber viscosity measurement in the viscose fiber production process of the above-mentioned prior art, the invention provides a kind of alkali fiber viscosity measurement method

Method used

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  • Measuring method for viscosity of alkali cellulose

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Effect test

Embodiment 1

[0023] The alkali fiber viscosity measurement method is to soak the alkali fiber sample in distilled water, disperse it with a beater with a power of 210W, and then use a vacuum pump with a model of 2XZ-1 to carry out suction filtration and washing on a G2 sand core crucible until it is washed to use There is no red color in the phenolphthalein test; the washed sample is suction-filtered into a pancake in a Buchner funnel with a clean filter cloth of 8 cm in diameter, and then baked in a WS-70-1 infrared oven at a temperature of 250 ° C for 8 minutes, and then used The AB204-N electronic balance quickly weighed 0.3535g within 50 seconds and placed it in a small brown bottle containing 35ml cuproammonia solution (13g / L for copper and 150g / L for ammonia). The copper strips were plugged tightly with rubber stoppers, and then placed in a constant temperature room with a frequency of 200-240 beats per minute on a Kangen oscillator for 10 minutes until the sample was completely disso...

Embodiment 2

[0025] The alkali fiber viscosity measurement method is to soak the alkali fiber sample in distilled water, disperse it with a beater with a power of 210W, and then filter and wash it with a 2XZ-1 vacuum pump on a G2 sand core crucible until it is washed with 1% phenolphthalein. There is no redness in the test; the washed sample is suction-filtered into a pancake in a Buchner funnel with a clean filter cloth and a diameter of 10cm, and then baked in a WS-70-1 infrared oven at a temperature of 220°C for 9 minutes, and then washed with AB204 -N electronic balance quickly weighed 0.3535g within 60 seconds and placed it in a small brown bottle containing 35ml cuproammonia solution (13.2g / L for copper and 152g / L for ammonia). The copper strips were plugged tightly with rubber stoppers, and then placed in a constant temperature room with a frequency of 200-240 times / min on a Kangen oscillator for 15 minutes until the sample was completely dissolved. The solution is injected into a s...

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Abstract

The invention discloses a measuring method for viscosity of alkali cellulose, randomly selecting alkali cellulose sample. The method is characterized by the following steps: adopting sand core crucible, adjusting alkali liquor into neutral by distilled water using vacuum air pump in the condition of filtration, baking the sample to absolutely dry in infra-red oven, weighing the sample in proportion of 10g / 1 cellulose cuprammonium solution, dissolving the sample in the cuprammonium solution, vibrating in the oscillator to fully dissolve, adopting capillary visco meter to measure viscosity of alkali cellulose, finally counting the viscosity of alkali cellulose through viscosity of alkali cellulose=density of cuprammonium solution*measuring time*viscometer constant. The invention directly weighs absolutely dried pure fiber to improve measuring speed and accuracy of viscosity of alkali cellulose remarkably.

Description

technical field [0001] The invention relates to the measurement of alkali fiber viscosity in viscose fiber production process. Background technique [0002] Alkali fiber is an intermediate product in the production process of viscose filament. Its main components are cellulose and sodium hydroxide; the viscosity of alkali fiber reflects the depolymerization of cellulose. [0003] The measurement scheme of prior art is: [0004] The average methyl fiber content of the first three batches of alkali fiber is used to calculate the sample weight, and 1g of cellulose in 100ml solution is formulated into a cellulose cuproammonia solution with a concentration of 1%. The alkali fiber sample is weighed, and then the cuproammonia solution is used. It is 13±0.2g / l, ammonia is 200±5g / l, oscillate on the Consonian oscillator for 1-2 hours (the frequency of the Consonian oscillator is 200-240 times / min, and different samples have different oscillation times), Finally, the viscosity of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N11/06
Inventor 李蓉玲饶芳秋李万群邓海燕
Owner YIBIN HIEST FIBER
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