Production process of refined cotton for cuprammonium rayon
A production process and technology for refining cotton, applied in spinning solution preparation, textile and papermaking, fiber processing, etc., can solve problems such as trouble for manufacturers, low ratio of fiber length consistency, and problems with wire drawing machines. Stability, the effect of improving the consistency rate
Active Publication Date: 2010-02-24
HUBEI JINHANJIANG REFINED COTTON
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Problems solved by technology
[0008] There are two main problems in the production of cupro from the refined cotton produced by the above-mentioned process. The wire drawing machine is prone to problems; the second is that the fiber length consistency ratio is low. In the process of producing cupro ammonia wire, the chemical treatment of the fiber is unstable and easy to block the wire drawing hole, which brings a lot of trouble to downstream manufacturers.
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] The production process of refined cotton for copper ammonia wire is as follows:
[0016] 1. Cotton opening: 1900Kg of cotton linters with a length of 5-8mm are loosened and removed;
[0017] 2. Alkali soaking: fully and evenly soak the lye into the above-mentioned cotton linters;
[0018] 3. Cooking: Put cotton linters: sodium hydroxide solution at a ratio of 1:3.6-3.8 into the steaming ball, then rotate the steaming ball idly for 10-20 minutes, and control the temperature inside the steaming ball at 60°C-80°C , then carry out the first temperature rise, the temperature rise time is 35-40 minutes, the temperature inside the steamer is controlled at 114°C-116°C, and the pressure is controlled at 0.2-0.42MPa to release the small steam, and the time to release the small steam is 5-10 minutes , the pressure is discharged, and then the second temperature rise is carried out. The temperature rise time is 40-65 minutes. Minutes, the best effect is to control the temperature ...
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Abstract
The invention discloses a production process of refined cotton for cuprammonium rayon. The production process comprises cotton slitting, mercerization, stewing, rinsing, roller compaction, drying andpacking, wherein linter with the length between 5 and 8mm is selected as a raw material during cotton slitting; during stewing, the temperature inside a spherical digester is controlled to be between158 and 165 DEG C and the pressure is controlled to be between 0.56 and 0.75MPa during carrying out second heating and a constant temperature is kept for 100 and 120 minutes; and during rinsing, the oxidation time is controlled to be between 30 and 40 minutes during twice bleaching. The production process has the advantages that the process effectively controls the fluctuation range of product polymerization degree to between 750 and 830; and by controlling the length of the selected raw fibre to between 5 and 8mm during cotton slitting, the process effectively increases the consistency rate of product fibre length and also improves the stability of chemical treatment of fibre in downstream factories, which are favorable for normal production in factories.
Description
technical field [0001] The invention relates to the technical field of refined cotton production technology, more specifically relates to the production technology of refined cotton for copper ammonia silk. Background technique [0002] The main raw material for the production of cupro ammonia silk is cotton linter in cotton, which is soaked in caustic soda solution, boiled at high temperature, washed with water, and bleached to become refined cotton linter, then add ammonium and copper hydroxide to dissolve and stir to form Viscous stock solution, the stock solution is extruded into fibrous form through the holes of the spinneret in warm water, regenerated by sulfuric acid and then spun. This material has long been a necessary lining material for high-end suits and suits in the Japanese market because of its unique Very good moisture absorption and moisture release effect, the feeling of soft and delicate contact with the skin is still irreplaceable. At present, the product...
Claims
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Patent Timeline
Login to View More IPC IPC(8): D01C1/00D01D1/02
Inventor 周家贵
Owner HUBEI JINHANJIANG REFINED COTTON