CN112575403A - Clean high-whiteness extinction viscose fiber and preparation method thereof - Google Patents
Clean high-whiteness extinction viscose fiber and preparation method thereof Download PDFInfo
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- CN112575403A CN112575403A CN202011590640.4A CN202011590640A CN112575403A CN 112575403 A CN112575403 A CN 112575403A CN 202011590640 A CN202011590640 A CN 202011590640A CN 112575403 A CN112575403 A CN 112575403A
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- 239000000835 fiber Substances 0.000 title claims abstract description 66
- 229920000297 Rayon Polymers 0.000 title claims abstract description 58
- 230000008033 biological extinction Effects 0.000 title claims abstract description 36
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 238000005406 washing Methods 0.000 claims description 30
- 239000002253 acid Substances 0.000 claims description 22
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 239000003513 alkali Substances 0.000 claims description 13
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 12
- 239000003607 modifier Substances 0.000 claims description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 229920000742 Cotton Polymers 0.000 claims description 9
- 238000006477 desulfuration reaction Methods 0.000 claims description 9
- 230000023556 desulfurization Effects 0.000 claims description 9
- 238000004061 bleaching Methods 0.000 claims description 8
- 238000009991 scouring Methods 0.000 claims description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 6
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 6
- 235000011152 sodium sulphate Nutrition 0.000 claims description 6
- 238000009987 spinning Methods 0.000 claims description 6
- 238000004383 yellowing Methods 0.000 claims description 6
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 6
- 229960001763 zinc sulfate Drugs 0.000 claims description 6
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 6
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 239000004745 nonwoven fabric Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 239000005708 Sodium hypochlorite Substances 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 239000008041 oiling agent Substances 0.000 claims description 4
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052979 sodium sulfide Inorganic materials 0.000 claims description 4
- GRVFOGOEDUUMBP-UHFFFAOYSA-N sodium sulfide (anhydrous) Chemical compound [Na+].[Na+].[S-2] GRVFOGOEDUUMBP-UHFFFAOYSA-N 0.000 claims description 4
- 238000001179 sorption measurement Methods 0.000 claims description 4
- 238000003483 aging Methods 0.000 claims description 3
- 230000032683 aging Effects 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000004090 dissolution Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 3
- 238000005554 pickling Methods 0.000 claims description 3
- 239000001038 titanium pigment Substances 0.000 claims description 3
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 claims description 3
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 4
- 238000007380 fibre production Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 11
- 238000005457 optimization Methods 0.000 description 9
- 239000000243 solution Substances 0.000 description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 3
- 239000001913 cellulose Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 description 1
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229920002334 Spandex Polymers 0.000 description 1
- 229920004933 Terylene® Polymers 0.000 description 1
- HGINCPLSRVDWNT-UHFFFAOYSA-N acrylaldehyde Natural products C=CC=O HGINCPLSRVDWNT-UHFFFAOYSA-N 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 235000009120 camo Nutrition 0.000 description 1
- 235000005607 chanvre indien Nutrition 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011487 hemp Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000009898 sodium hypochlorite bleaching Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000004759 spandex Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- 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
- D01F2/10—Addition to the spinning solution or spinning bath of substances which exert their effect equally well in either
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- 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
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06L—DRY-CLEANING, WASHING OR BLEACHING FIBRES, FILAMENTS, THREADS, YARNS, FABRICS, FEATHERS OR MADE-UP FIBROUS GOODS; BLEACHING LEATHER OR FURS
- D06L4/00—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs
- D06L4/20—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen
- D06L4/22—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents
- D06L4/23—Bleaching fibres, filaments, threads, yarns, fabrics, feathers or made-up fibrous goods; Bleaching leather or furs using agents which contain halogen using inorganic agents using hypohalogenites
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- Artificial Filaments (AREA)
Abstract
The invention relates to the technical field of viscose fiber production, in particular to a clean high-whiteness extinction viscose fiber and a preparation method thereof. The preparation method is simple and convenient, the obtained clean high-whiteness extinction viscose fiber has stable quality, higher added value and greater enterprise income, not only fills up the blank of zero production in Xinjiang area, but also realizes the self supply of sanitary articles in Xinjiang area, and can be applied to the production of epidemic situation material masks.
Description
Technical Field
The invention relates to the technical field of viscose fiber production, in particular to a clean high-whiteness extinction viscose fiber and a preparation method thereof.
Background
The main raw materials of the textile at present are natural raw materials, petrochemical raw materials and raw materials regenerated from natural cellulose, the natural raw materials have better comfort and skin-friendly property, and meanwhile, the natural raw materials are healthier and more environment-friendly and are represented by cotton and hemp. The petrochemical raw materials have stronger functionality and higher strength, and are represented by spandex, terylene and acrylon. The raw material regenerated from natural cellulose has two characteristics of natural raw material and petrochemical raw material. Cotton fibers in all textile raw materials are popular for comfort, softness and skin friendliness, but natural cotton fibers are subjected to artificial planting, weather factors and land factors, so that the yield is low, and the natural cotton fibers cannot be applied in a large area. The viscose fiber belongs to the fiber regenerated from natural cellulose, has the comfort and skin-friendly property of cotton fiber and the functionality and high strength of petrochemical products, and is an ideal choice for replacing the natural cotton fiber.
The existing viscose fiber has low whiteness, and is yellow after being placed for a long time due to the limitation of a preparation process, which is called yellowing. And the yellowing property of the finished common viscose fiber can be mixed with impurities which are not cleaned completely in the preparation process, so that the finished common viscose fiber can only be used for common textiles. The sanitary articles have strict requirements, and the requirements of low organic matter content, high whiteness and less impurities are required to meet the requirements of the sanitary articles.
Disclosure of Invention
The invention provides a clean high-whiteness extinction viscose fiber and a preparation method thereof, overcomes the defects of the prior art, and can effectively solve the problems of low whiteness and high production cost of the viscose fiber.
One of the technical schemes of the invention is realized by the following measures: a preparation method of clean high-whiteness extinction viscose fiber comprises the following steps: firstly, adding titanium dioxide and a modifier into the viscose subjected to alkalization, yellowing, dissolution, ageing and filtration before reaching a spinning workshop; secondly, the viscose added with the titanium pigment and the modifier reaches a spinning workshop to react with an acid bath to generate extinction viscose fibers, the obtained extinction viscose fibers are gathered into tows, and the tows are strongly drawn and cut off to reach a fiber groove; thirdly, opening the tows reaching the fiber groove by three times of steam, and then sending the tows to a scouring machine; and fourthly, after the tows in the scouring machine are subjected to primary washing, desulfurization, secondary washing, bleaching, tertiary washing, pickling, quaternary washing and oiling, the tows are fully loosened by a wet cotton opener and enter a dryer, and the clean high-whiteness extinction viscose fiber is obtained after steam drying.
The following is a further optimization or/and improvement of one of the above-mentioned technical solutions of the invention:
in the first step, the weight of the modifier is 1.5 per mill of the weight of the methyl fiber in the viscose.
In the second step, the acid bath comprises sulfuric acid, zinc sulfate and sodium sulfate, the concentration of the sulfuric acid is 110g/L to 118g/L, the concentration of the zinc sulfate is 7.5g/L to 8.5g/L, the concentration of the sodium sulfate is 345g/L to 355g/L, and the difference between the concentration of the returned acid after the reaction and the concentration of the supplied acid is 8g/L to 10 g/L.
In the second step, the tows are cut off by circulating scouring water after being filtered by a Fendabeke filtering system, the turbidity is less than or equal to 10NTU after being filtered, and suspended matters are less than or equal to 40 mg/L.
In the third step, one of the three steam is steam jet opening at the S bend of the lower capillary, the steam pressure is 0.2MPa to 0.25MPa, the other steam is steam opening of the mini of the lower capillary flat pipe section, the steam pressure is 35MPa to 45kPa, the other steam opening of the fiber feeding groove is performed, and the steam pressure is 0.08MPa to 0.12 MPa.
In the fourth step, the temperature of the first water washing is 65-75 ℃, and the pH value of the water washing liquid is 6.5-8.0; the dilute alkali liquor recovered by a carbon adsorption washing tower is used for desulfurization, the concentration of sodium hydroxide in the dilute alkali liquor is 1.2g/L to 1.5g/L, and the temperature of the dilute alkali liquor is 85 ℃ to 90 ℃; second, the washing flow is 35-40 m of flowering by year, and the pH value is 8.0-1.0; the bleaching uses sodium hypochlorite with the concentration of 5.0g/L to 6.0 g/L; the acid cleaning uses food-grade citric acid, the pH value of the acid cleaning solution is 4.0 to 5.0, and the pH value of the viscose fiber after the acid cleaning is 6.5 to 7.5; carrying out fourth washing at the flow rate of 35-45 m high speed; the oiling uses special oiling agent for spunlace non-woven fabrics, and the concentration of oil bath is 3g/L to 5 g/L.
The dilute alkali solution is a mixture of sodium sulfide and sodium hydroxide.
During oiling, hydrogen peroxide is added into the oil agent, and the adding amount of the hydrogen peroxide is 450ml/min to 550 ml/min.
The temperature of the dryer is 100 ℃ to 130 ℃.
The second technical scheme of the invention is realized by the following measures: a clean high-whiteness extinction viscose fiber prepared by a preparation method of the clean high-whiteness extinction viscose fiber.
The preparation method is simple and convenient, the obtained clean high-whiteness extinction viscose fiber has stable quality, higher added value and greater enterprise income, not only fills up the blank of zero production in Xinjiang area, but also realizes the self supply of sanitary articles in Xinjiang area, and can be applied to the production of epidemic situation material masks.
Detailed Description
The present invention is not limited by the following examples, and specific embodiments may be determined according to the technical solutions and practical situations of the present invention. The various chemical reagents and chemical articles mentioned in the invention are all the chemical reagents and chemical articles which are well known and commonly used in the prior art, unless otherwise specified; the percentages in the invention are mass percentages unless otherwise specified; the solution in the present invention is an aqueous solution in which the solvent is water, for example, a hydrochloric acid solution is an aqueous hydrochloric acid solution, unless otherwise specified; the normal temperature and room temperature in the present invention generally mean a temperature of 15 ℃ to 25 ℃, and are generally defined as 25 ℃.
The invention is further described below with reference to the following examples:
example 1: the preparation method of the clean high-whiteness extinction viscose fiber comprises the following steps: firstly, adding titanium dioxide and a modifier into the viscose subjected to alkalization, yellowing, dissolution, ageing and filtration before reaching a spinning workshop; secondly, the viscose added with the titanium pigment and the modifier reaches a spinning workshop to react with an acid bath to generate extinction viscose fibers, the obtained extinction viscose fibers are gathered into tows, and the tows are strongly drawn and cut off to reach a fiber groove; thirdly, opening the tows reaching the fiber groove by three times of steam, and then sending the tows to a scouring machine; and fourthly, after the tows in the scouring machine are subjected to primary washing, desulfurization, secondary washing, bleaching, tertiary washing, pickling, quaternary washing and oiling, the tows are fully loosened by a wet cotton opener and enter a dryer, and the clean high-whiteness extinction viscose fiber is obtained after steam drying.
The clean high-whiteness extinction viscose fiber obtained by the method has stable whiteness, the whiteness of the product reaches 87.5-88.5, the blank of zero production in Xinjiang area is filled up, and the sanitary article supply in Xinjiang area can be realized by matching with a spunlace non-woven fabric manufacturer. The emergence of clean high white extinction viscose staple fiber has greatly reduced the manufacturing cost of epidemic situation material gauze mask, has improved the productivity of disposable gauze mask simultaneously, has also brought more profit spaces for the enterprise. The price of the clean high-whiteness extinction viscose fiber is 500 yuan higher than that of the common viscose staple fiber, and is calculated according to the annual capacity of 4 ten thousand tons of a single line in a workshop. The annual income can be created by 500 × 40000=20000000 yuan =2 million yuan.
Example 2: as an optimization of the above embodiment, in the first step, the weight of the modifier is 1.5 per mill of the weight of the methyl cellulose in the viscose.
The titanium dioxide can be the existing commercial titanium dioxide delustering agent, the modifier can be the existing commercial polyethylene glycol alkyl polyamine, and the modifier can mainly improve the strength of the finished fiber.
Example 3: as an optimization of the above embodiment, in the second step, the acid bath includes sulfuric acid, zinc sulfate and sodium sulfate, the concentration of the sulfuric acid is 110g/L to 118g/L, the concentration of the zinc sulfate is 7.5g/L to 8.5g/L, the concentration of the sodium sulfate is 345g/L to 355g/L, and the difference between the concentration of the returned acid after the reaction and the concentration of the supplied acid is 8g/L to 10 g/L.
Example 4: as an optimization of the above example, in the second step, the tow was cut off by circulating combed water after filtration using a Findbeck filtration system, and the turbidity was < 10NTU after filtration and the suspended matter was < 40 mg/L.
Example 5: as the optimization of the embodiment, in the third step, one of the three steam is steam jet opening at the bend of the lower capillary S, the steam pressure is 0.20MPa to 0.25MPa, the other steam is steam opening at the mini section of the lower capillary, the steam pressure is 35MPa to 45kPa, the other steam is steam opening at the fiber feeding groove, and the steam pressure is 0.08MPa to 0.12 MPa.
Example 6: as the optimization of the above embodiment, in the fourth step, the temperature of the first water washing is 65 ℃ to 75 ℃, and the pH value of the water washing liquid is 6.5 to 8.0; the dilute alkali liquor recovered by a carbon adsorption washing tower is used for desulfurization, the concentration of sodium hydroxide in the dilute alkali liquor is 1.2g/L to 1.5g/L, and the temperature of the dilute alkali liquor is 85 ℃ to 90 ℃; second, the washing flow is 35-40 m of flowering by year, and the pH value is 8.0-1.0; the bleaching uses sodium hypochlorite with the concentration of 5.0g/L to 6.0 g/L; the acid cleaning uses food-grade citric acid, the pH value of the acid cleaning solution is 4.0 to 5.0, and the pH value of the viscose fiber after the acid cleaning is 6.5 to 7.5; carrying out fourth washing at the flow rate of 35-45 m high speed; the oiling uses special oiling agent for spunlace non-woven fabrics, and the concentration of oil bath is 3g/L to 5 g/L.
In the invention, dilute alkali liquor recovered by the carbon adsorption washing tower is used for desulfurization and is a mixture of sodium sulfide and sodium hydroxide, so that the desulfurization effect is better, the residual sulfur of fibers can be reduced, and the yellowing of the fibers can be effectively inhibited;
second washing flow is 35-40 m, pH value is 8.0-1.0, good conditions are provided for subsequent sodium hypochlorite bleaching, and residue of a desulfurization procedure is washed off fully;
meanwhile, sodium hypochlorite is used for bleaching, so that the fiber can meet the requirement of high whiteness;
the acid cleaning uses food-grade citric acid, so that the pH value of the viscose fiber is convenient to control, and nonferrous metal ions in the fiber can be removed;
carrying out four-step washing at the flow rate of 35-45 m high speed and the temperature of 80-90 ℃ so as to provide the base fiber temperature for oiling;
the oiling uses special oiling agent for spunlace non-woven fabric, and can realize strong antistatic performance and softness performance, thereby weakening cohesive force.
Example 7: as optimization of the above embodiment, the dilute alkali solution is a mixture of sodium sulfide and sodium hydroxide.
Example 8: as optimization of the embodiment, during oiling, hydrogen peroxide is added into the oil agent, and the adding amount of the hydrogen peroxide is 450ml/min to 550 ml/min.
And hydrogen peroxide can be added into the oil agent to realize secondary bleaching according to requirements.
Example 9: as an optimization of the above embodiment, the dryer temperature is 100 to 130 ℃.
The drying temperature is controlled between 100 ℃ and 130 ℃, so that the moisture regain of the fiber is between 10% and 12% while energy is saved.
Example 10: the clean high-whiteness extinction viscose fiber prepared by the preparation method of the clean high-whiteness extinction viscose fiber.
The performance parameters of the clean high-whiteness extinction viscose fiber obtained by the invention are as follows: the titer is 1.68dtex, the dry breaking strength is 2.0cN/dtex to 2.2cN/dtex, the residual sulfur is less than or equal to 3mg/100g, the oil content is 0.1 percent to 0.2 percent, the whiteness is 87.5 percent to 88.5 percent, and the surface active matter is less than or equal to 4 mm.
In conclusion, the preparation method is simple and convenient, the obtained clean high-whiteness extinction viscose fiber has stable quality, higher added value and higher enterprise income, not only makes up for the blank of zero production in Xinjiang area, but also realizes the self supply of sanitary articles in Xinjiang area, and can be applied to the production of epidemic situation material masks.
The technical characteristics form an embodiment of the invention, which has strong adaptability and implementation effect, and unnecessary technical characteristics can be increased or decreased according to actual needs to meet the requirements of different situations.
Claims (10)
1. A preparation method of clean high-whiteness extinction viscose fibers is characterized by comprising the following steps: firstly, adding titanium dioxide and a modifier into the viscose subjected to alkalization, yellowing, dissolution, ageing and filtration before reaching a spinning workshop; secondly, the viscose added with the titanium pigment and the modifier reaches a spinning workshop to react with an acid bath to generate extinction viscose fibers, the obtained extinction viscose fibers are gathered into tows, and the tows are strongly drawn and cut off to reach a fiber groove; thirdly, opening the tows reaching the fiber groove by three times of steam, and then sending the tows to a scouring machine; and fourthly, after the tows in the scouring machine are subjected to primary washing, desulfurization, secondary washing, bleaching, tertiary washing, pickling, quaternary washing and oiling, the tows are fully loosened by a wet cotton opener and enter a dryer, and the clean high-whiteness extinction viscose fiber is obtained after steam drying.
2. The method for preparing clean and white delustering viscose fiber as claimed in claim 1, wherein in the first step, the weight of the modifier is 1.5 per mill of the weight of the methyl fiber in the viscose.
3. The method for preparing clean high-whiteness extinction viscose fibers according to claim 1 or 2, wherein in the second step, the acid bath comprises sulfuric acid, zinc sulfate and sodium sulfate, the concentration of the sulfuric acid is 110g/L to 118g/L, the concentration of the zinc sulfate is 7.5g/L to 8.5g/L, the concentration of the sodium sulfate is 345g/L to 355g/L, and the difference between the concentration of the returned acid and the concentration of the supplied acid after the reaction is 8g/L to 10 g/L.
4. The method for preparing clean high-whiteness extinction viscose fibers according to claim 1, 2 or 3, wherein in the second step, the tows are cut off by circulating scouring water after filtration by using a Findabek filtration system, and the turbidity after filtration is less than or equal to 10NTU, and the suspended matter is less than or equal to 40 mg/L.
5. The method for preparing clean high white extinction viscose fibers according to claim 1, 2, 3 or 4, wherein in the third step, one of the three steam courses is steam jet opening at the S-bend of the lower capillary, the steam pressure is 0.20MPa to 0.25MPa, one steam course is steam opening at the mini section of the lower capillary, the steam pressure is 35MPa to 45kPa, and the other steam course is steam opening at the fiber feeding groove, and the steam pressure is 0.08MPa to 0.12 MPa.
6. The method for preparing clean high-whiteness extinction viscose fibers according to claim 1, 2, 3, 4 or 5, wherein in the fourth step, the temperature of first water washing is 65-75 ℃, and the pH value of water washing liquid is 6.5-8.0; the dilute alkali liquor recovered by a carbon adsorption washing tower is used for desulfurization, the concentration of sodium hydroxide in the dilute alkali liquor is 1.2g/L to 1.5g/L, and the temperature of the dilute alkali liquor is 85 ℃ to 90 ℃; second, the washing flow is 35-40 m of flowering by year, and the pH value is 8.0-1.0; the bleaching uses sodium hypochlorite with the concentration of 5.0g/L to 6.0 g/L; the acid cleaning uses food-grade citric acid, the pH value of the acid cleaning solution is 4.0 to 5.0, and the pH value of the viscose fiber after the acid cleaning is 6.5 to 7.5; carrying out fourth washing at the flow rate of 35-45 m high speed; the oiling uses special oiling agent for spunlace non-woven fabrics, and the concentration of oil bath is 3g/L to 5 g/L.
7. The method for preparing clean white extinction viscose fiber according to claim 5 or 6, wherein the dilute alkali solution is a mixture of sodium sulfide and sodium hydroxide.
8. The preparation method of the clean high-whiteness extinction viscose fibers according to claim 6 or 7, wherein hydrogen peroxide is added into the oil agent during oiling, and the addition amount of the hydrogen peroxide is 450ml/min to 550 ml/min.
9. The method for preparing clean white extinction viscose fiber according to claim 7, wherein the temperature of the dryer is 100 ℃ to 130 ℃.
10. A clean high-whiteness extinction viscose fiber prepared by the method according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011590640.4A CN112575403A (en) | 2020-12-29 | 2020-12-29 | Clean high-whiteness extinction viscose fiber and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011590640.4A CN112575403A (en) | 2020-12-29 | 2020-12-29 | Clean high-whiteness extinction viscose fiber and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540970A (en) * | 2022-03-21 | 2022-05-27 | 赛得利(中国)纤维有限公司 | Refreshing nonwoven cellulose fiber and preparation method thereof |
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| US4242405A (en) * | 1979-01-15 | 1980-12-30 | Avtex Fibers Inc. | Viscose rayon and method of making same |
| CN104928786A (en) * | 2015-05-27 | 2015-09-23 | 宜宾丝丽雅集团有限公司 | Preparation process of semi-dull high-strength low-elongation viscose fiber |
| CN108588880A (en) * | 2018-05-15 | 2018-09-28 | 赛得利（福建）纤维有限公司 | A kind of preparation method of clean high white viscose rayon |
| CN109930225A (en) * | 2019-02-20 | 2019-06-25 | 赛得利（福建）纤维有限公司 | White viscose rayon of a kind of no chlorine drift height and preparation method thereof |
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| US4242405A (en) * | 1979-01-15 | 1980-12-30 | Avtex Fibers Inc. | Viscose rayon and method of making same |
| CN104928786A (en) * | 2015-05-27 | 2015-09-23 | 宜宾丝丽雅集团有限公司 | Preparation process of semi-dull high-strength low-elongation viscose fiber |
| CN108588880A (en) * | 2018-05-15 | 2018-09-28 | 赛得利（福建）纤维有限公司 | A kind of preparation method of clean high white viscose rayon |
| CN109930225A (en) * | 2019-02-20 | 2019-06-25 | 赛得利（福建）纤维有限公司 | White viscose rayon of a kind of no chlorine drift height and preparation method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114540970A (en) * | 2022-03-21 | 2022-05-27 | 赛得利(中国)纤维有限公司 | Refreshing nonwoven cellulose fiber and preparation method thereof |
| CN114540970B (en) * | 2022-03-21 | 2023-10-13 | 赛得利(中国)纤维有限公司 | Fresh non-woven cellulose fiber and preparation method thereof |
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