CN112831852A - Production process for continuously spinning superfine filaments - Google Patents
Production process for continuously spinning superfine filaments Download PDFInfo
- Publication number
- CN112831852A CN112831852A CN202011635705.2A CN202011635705A CN112831852A CN 112831852 A CN112831852 A CN 112831852A CN 202011635705 A CN202011635705 A CN 202011635705A CN 112831852 A CN112831852 A CN 112831852A
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- China
- Prior art keywords
- viscose
- filtration
- spinning
- acid bath
- stock solution
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/06—Wet spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/02—Preparation of spinning solutions
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
- D01F11/02—Chemical after-treatment of artificial filaments or the like during manufacture of cellulose, cellulose derivatives, or proteins
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F2/00—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof
- D01F2/06—Monocomponent artificial filaments or the like of cellulose or cellulose derivatives; Manufacture thereof from viscose
- D01F2/08—Composition of the spinning solution or the bath
Abstract
The invention discloses a production process of continuous spinning superfine filaments, which comprises the following steps: 1) preparing a viscose stock solution; 2) spraying the viscose stock solution into an acid bath through the pores for reaction; 3) washing, desulfurizing, bleaching, pickling, oiling and drying the viscose fiber subjected to acid bath, wherein the viscose stock solution in 1) is prepared by the following steps: the method comprises the steps of subjecting raw material pulp to front-end sulfonation, dissolution, defoaming, primary filtration and secondary filtration, adding an auxiliary agent EBT and V5141 into viscose, uniformly mixing, subjecting the viscose to three-pass filtration and four-pass filtration, and subjecting the viscose to pre-spinning filtration through a metal sintered filter element before entering a spinning machine. The production process of the invention prepares the spinning viscose dope suitable for the production of the continuous spinning superfine filament through special process blending, and can effectively reduce the surface tension of the viscose, improve the reaction performance of the viscose and an acid bath and well solve the spinnability problem in the production of the superfine filament through a reasonable acid bath process and a slurry process.
Description
Technical Field
The invention relates to the field of textile technology, in particular to a production technology for continuously spinning superfine filaments.
Background
Continuous spinning is a new viscose filament yarn production method developed after semi-continuous spinning, and compared with semi-continuous spinning, the continuous spinning has the following advantages: short production flow, convenient maintenance, high productivity of a single machine, low production cost, good production environment and the like. Therefore, China viscose filament yarn enterprises represented by Xinxiang chemical fibers and Jilin chemical fibers are vigorously developing continuous spinning, and downstream customers have higher and higher acceptance of the continuous spinning, so that the continuous spinning becomes the mainstream direction of the development of viscose filaments in the future.
But continuous spinning also has certain defects, because the strand silk is washed and dried, the strength of the strand silk is low, the whiteness is low, and the strand silk is rough; in order to increase the holding sizing of the silk strips, sizing agent needs to be removed when the embroidery threads are dyed, and the production cost of downstream products is increased; the requirement on the quality of the raw material viscose is high. In particular, in the production process of ultra-fine filaments of 75D or less, there are problems such as a large amount of filaments and poor spinnability.
Meanwhile, when the superfine silk is produced, because the aperture of the nozzle is smaller than that of other varieties, the requirements on the quality (including particles, viscosity, maturity and the like) of the viscose are different from those of other varieties, and the viscose directly spun by semicontinuous spinning is easy to cause defects such as broken silk and broken ends.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a continuous superfine filament spinning production process, which is characterized in that a spinning viscose dope suitable for continuous superfine filament spinning production is prepared through special process blending, and through a reasonable acid bath process and a slurry process, the surface tension of viscose can be effectively reduced, the reaction performance of the viscose and an acid bath is improved, and the spinnability problem in superfine filament production can be well solved.
The invention is realized by the following technical scheme:
a production process of continuous spinning superfine filaments comprises the following steps: 1) preparing a viscose stock solution; 2) spraying the viscose stock solution into an acid bath through the pores for reaction; 3) washing, desulfurizing, bleaching, pickling, oiling and drying the viscose fiber subjected to acid bath, wherein the viscose stock solution in the step 1) is prepared by the following steps: the method comprises the steps of subjecting raw material pulp to front-end sulfonation, dissolution, defoaming, primary filtration and secondary filtration, adding a mixed auxiliary agent EBT and V5141 into viscose, uniformly mixing, subjecting the viscose to three-pass filtration and four-pass filtration, and subjecting the viscose to pre-spinning filtration through a metal sintered filter element before entering a spinning machine.
The production process of the invention prepares the spinning viscose dope suitable for the production of the continuous spinning superfine filament through special process blending, and can effectively reduce the surface tension of the viscose, improve the reaction performance of the viscose and an acid bath and well solve the spinnability problem in the production of the superfine filament through a reasonable acid bath process and a slurry process.
In the preparation process of the viscose stock solution, the surface tension of the viscose can be greatly reduced by adding the auxiliary agents EBT and V5141, so that the later-stage spinning forming is promoted; the viscose mixed with the auxiliary agent is subjected to fine filtration (three-way filtration and four-way filtration) to prepare a viscose stock solution with the maturation degree of 10-10.5 (ammonium chloride value) and the viscosity of 38-42 seconds, so that the viscose quality is improved; and finally, before entering a spinning machine, adding a metal sintered filter element with the filtering precision of 15-30 mu m, and filtering the viscose again to remove impurities such as gel particles and the like generated in a viscose pipeline. Through the improvement of the steps, the surface tension of the viscose can be effectively reduced, so that the reaction performance of the viscose and the acid bath is improved.
The acid bath process conditions in the step 2) are as follows: the concentration of sulfuric acid is 130-136g/L, the concentration is 12-13g/L, and the concentration of sodium sulfate is 240-260 g/L.
The invention adopts the process conditions of low acid, high zinc and high sodium sulfate, can avoid the condition that the monofilament is broken to form broken filaments under the severe acid bath reaction due to the low monofilament fineness and the very fine monofilament of the superfine filaments, reduces the damage to the filament structure in the viscose reaction process, and improves the strength and the quality of the viscose fibers.
The process conditions for applying the sizing agent in the step 3) are as follows: and (3) low concentration: slurry concentration 2-5%, high flow: the flow rate of the slurry is 3-5ml/min, the slurry preparation process is consistent with the conventional preparation process, the feeding amount of the slurry is reduced by a certain amount, and the feeding amounts of the main components V615 and V630 of the slurry are reduced to 40% -60% of the original feeding amount.
The invention adopts a control mode of low concentration and high flow, firstly, during the production of the superfine silk, the required slurry is less, and the low-concentration slurry is prepared, so that the rotating speed of a slurry feeding pump can be ensured not to be too low, and the slurry can be stably supplied for a long time; secondly can reduce the thick liquids of adhering to on the little roller, avoid adhering to the thick liquids on the little roller and harden and form the hard piece, the condition of fish tail strand silk when the strand silk passes through can effectually avoid the strand silk to receive the damage that mechanical friction caused.
In the step 1), the auxiliaries EBT and V5141 are injected into the viscose pipeline through an injection pump and are uniformly dispersed into the viscose under the action of a static mixer, so that the mixing uniformity of the auxiliaries and the viscose solution is improved.
The addition amount of the mixed auxiliary agent is 0.5-1 per mill, and the mixing proportion of EBT and VIF51/41 is 0-100%.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the production process for continuously spinning superfine filaments, the auxiliaries EBT and V51410 are added into the viscose solution, so that the surface tension of the viscose can be effectively reduced, the reaction performance of the viscose is improved, and the spinnability problem in the production of the superfine filaments can be well solved;
2. the invention relates to a continuous spinning superfine filament production process, which adopts an acid bath process with low acid, high zinc and high sodium sulfate, and can reduce the damage to a filament structure in the viscose reaction process;
3. the invention relates to a production process for continuously spinning superfine filaments, which adopts a sizing process with low concentration and high flow rate and can effectively avoid the damage of filaments caused by mechanical friction.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limitations of the present invention.
Examples
A production process of continuous spinning superfine filaments comprises the following steps:
1) preparing a viscose stock solution: the method comprises the following steps of (1) after front-end sulfonation, dissolution, defoaming, primary filtration and secondary filtration of raw material pulp, adding an auxiliary agent EBT and V5141 into viscose, uniformly mixing, then carrying out three-pass filtration and four-pass filtration on the viscose, and finally carrying out pre-spinning filtration on the viscose through a metal sintering filter element before the viscose enters a spinning machine;
2) the viscose stock solution is sprayed into the acid bath through the pores to react, and the acid bath process conditions are as follows: the concentration of sulfuric acid is 130g/L, the concentration is 12g/L, and the concentration of sodium sulfate is 240 g/L;
3) the viscose fiber after acid bath is washed, desulfurized, bleached, acid-washed, oiled and dried, and the technological conditions for oiling the sizing agent are as follows: the concentration of the slurry is 5%, the flow rate of the slurry is 3ml/min, and the ratio of the slurry to the slurry is 75:95: 3.
Example 2
A production process of continuous spinning superfine filaments comprises the following steps:
1) preparing a viscose stock solution: the method comprises the following steps of (1) after front-end sulfonation, dissolution, defoaming, primary filtration and secondary filtration of raw material pulp, adding an auxiliary agent EBT and V5141 into viscose, uniformly mixing, then carrying out three-pass filtration and four-pass filtration on the viscose, and finally carrying out pre-spinning filtration on the viscose through a metal sintering filter element before the viscose enters a spinning machine;
2) the viscose stock solution is sprayed into the acid bath through the pores to react, and the acid bath process conditions are as follows: the concentration of sulfuric acid is 136g/L, the concentration is 13g/L, and the concentration of sodium sulfate is 260 g/L;
3) the viscose fiber after acid bath is washed, desulfurized, bleached, acid-washed, oiled and dried, and the technological conditions for oiling the sizing agent are as follows: the concentration of the slurry is 5 percent, the flow rate of the slurry is 3ml/min, and the mixture ratio of the slurry is 37:42: 3.
Comparative example 1
The difference from example 1 is that no auxiliaries EBT and V5141 were added in step 1).
Comparative example 2
The difference from the example 1 is that the acid bath process conditions in the step 2) are as follows: the concentration of sulfuric acid is 136g/L, the concentration is 2g/L, and the concentration of sodium sulfate is 40 g/L.
The performance of the ultrafine fiber structures prepared in examples 1 to 2 of the present invention was measured, and the results are shown in Table 1 below.
TABLE 1 Performance data for the ultra-fine fibers produced according to the invention
In conclusion, the superfine fiber prepared by the process method has good strength and elongation, and the damage to the filament structure in the viscose reaction process is reduced.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A production process of continuous spinning superfine filaments comprises the following steps: 1) preparing a viscose stock solution; 2) spraying the viscose stock solution into an acid bath through the pores for reaction; 3) the viscose fiber after acid bath is washed, desulfurized, bleached, pickled, oiled and dried, and the preparation method is characterized in that the viscose stock solution in the step 1) is prepared by the following steps: the method comprises the steps of subjecting raw material pulp to front-end sulfonation, dissolution, defoaming, primary filtration and secondary filtration, adding a mixed auxiliary agent EBT and V5141 into viscose, uniformly mixing, subjecting the viscose to three-pass filtration and four-pass filtration, and subjecting the viscose to pre-spinning filtration through a metal sintered filter element before entering a spinning machine.
2. The process of claim 1, wherein the acid bath conditions in step 2) are as follows: the sulfuric acid concentration is 130-.
3. The process of claim 1, wherein the process conditions for applying the sizing agent in step 3) are as follows: the concentration of the slurry is 2-5%, and the flow rate of the slurry is 3-5 ml/min.
4. The process of claim 1, wherein the additives EBT and V5141 in step 1) are injected into the viscose pipe by an injection pump and uniformly dispersed into the viscose by the static mixer.
5. The process of claim 1, wherein the sintered metal filter element has a filtering accuracy of 15 to 30 μm.
6. The process of claim 1, wherein the mixing aid is added in an amount of 0.5 to 1% o, and the mixing ratio of EBT and VIF51/41 is 0 to 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011635705.2A CN112831852A (en) | 2020-12-31 | 2020-12-31 | Production process for continuously spinning superfine filaments |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011635705.2A CN112831852A (en) | 2020-12-31 | 2020-12-31 | Production process for continuously spinning superfine filaments |
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| Publication Number | Publication Date |
|---|---|
| CN112831852A true CN112831852A (en) | 2021-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011635705.2A Pending CN112831852A (en) | 2020-12-31 | 2020-12-31 | Production process for continuously spinning superfine filaments |
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Citations (6)
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|---|---|---|---|---|
| CN1337477A (en) * | 2000-08-05 | 2002-02-27 | 吉林化纤股份有限公司 | Continuous viscose filament spinning technique |
| CN101265617A (en) * | 2008-04-30 | 2008-09-17 | 宜宾丝丽雅集团有限公司 | Method for producing coloured cut staple by dying viscose glue |
| CN103215680A (en) * | 2013-04-08 | 2013-07-24 | 宜宾海丝特纤维有限责任公司 | Production technology of viscose extinction monofilament |
| US20170051435A1 (en) * | 2015-08-18 | 2017-02-23 | Easy Health Inc. | Mint-containing composite cellulose fiber and production method thereof |
| CN107557890A (en) * | 2017-09-05 | 2018-01-09 | 宜宾海丝特纤维有限责任公司 | A kind of production technology of nitrogen phosphorous flame-retardant viscose filament yarn |
| CN108677273A (en) * | 2018-05-15 | 2018-10-19 | 赛得利（福建）纤维有限公司 | A kind of preparation method of fine-denier strong viscose rayon |
-
2020
- 2020-12-31 CN CN202011635705.2A patent/CN112831852A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1337477A (en) * | 2000-08-05 | 2002-02-27 | 吉林化纤股份有限公司 | Continuous viscose filament spinning technique |
| CN101265617A (en) * | 2008-04-30 | 2008-09-17 | 宜宾丝丽雅集团有限公司 | Method for producing coloured cut staple by dying viscose glue |
| CN103215680A (en) * | 2013-04-08 | 2013-07-24 | 宜宾海丝特纤维有限责任公司 | Production technology of viscose extinction monofilament |
| US20170051435A1 (en) * | 2015-08-18 | 2017-02-23 | Easy Health Inc. | Mint-containing composite cellulose fiber and production method thereof |
| CN107557890A (en) * | 2017-09-05 | 2018-01-09 | 宜宾海丝特纤维有限责任公司 | A kind of production technology of nitrogen phosphorous flame-retardant viscose filament yarn |
| CN108677273A (en) * | 2018-05-15 | 2018-10-19 | 赛得利（福建）纤维有限公司 | A kind of preparation method of fine-denier strong viscose rayon |
Non-Patent Citations (2)
| Title |
|---|
| 杨希安: "《粘胶纤维原液制造》", 31 October 1983, 纺织工业出版社 * |
| 沈淦清: "《染整工艺》", 30 November 2005 * |
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Application publication date: 20210525 |
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