CN116356442A - Superfine denier regenerated cellulose fiber and preparation method thereof - Google Patents
Superfine denier regenerated cellulose fiber and preparation method thereof Download PDFInfo
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- CN116356442A CN116356442A CN202310367814.8A CN202310367814A CN116356442A CN 116356442 A CN116356442 A CN 116356442A CN 202310367814 A CN202310367814 A CN 202310367814A CN 116356442 A CN116356442 A CN 116356442A
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- 229920003043 Cellulose fiber Polymers 0.000 title claims abstract description 59
- 239000004627 regenerated cellulose Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 89
- 229920002678 cellulose Polymers 0.000 claims abstract description 47
- 239000001913 cellulose Substances 0.000 claims abstract description 47
- 238000009987 spinning Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 24
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 24
- 239000000126 substance Substances 0.000 claims abstract description 18
- 229920003169 water-soluble polymer Polymers 0.000 claims abstract description 13
- 239000004014 plasticizer Substances 0.000 claims abstract description 9
- 239000002562 thickening agent Substances 0.000 claims abstract description 8
- 238000007670 refining Methods 0.000 claims abstract description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 45
- PEDCQBHIVMGVHV-UHFFFAOYSA-N glycerol group Chemical group OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 14
- 238000005406 washing Methods 0.000 claims description 12
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 11
- 239000002202 Polyethylene glycol Substances 0.000 claims description 11
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229920001223 polyethylene glycol Polymers 0.000 claims description 11
- 239000012991 xanthate Substances 0.000 claims description 11
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 10
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 10
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 238000004061 bleaching Methods 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000007921 spray Substances 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 7
- 230000032683 aging Effects 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 7
- 235000011152 sodium sulphate Nutrition 0.000 claims description 7
- 238000004383 yellowing Methods 0.000 claims description 7
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims description 7
- 229960001763 zinc sulfate Drugs 0.000 claims description 7
- 229910000368 zinc sulfate Inorganic materials 0.000 claims description 7
- 230000003009 desulfurizing effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 238000005452 bending Methods 0.000 abstract description 3
- 230000035699 permeability Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000004744 fabric Substances 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 abstract description 2
- 239000004753 textile Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 description 35
- 229920000297 Rayon Polymers 0.000 description 5
- 238000006477 desulfuration reaction Methods 0.000 description 5
- 230000023556 desulfurization Effects 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920001002 functional polymer Polymers 0.000 description 3
- 239000002861 polymer material Substances 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000002932 luster Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000004886 process control Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001523 electrospinning Methods 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
Images
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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Artificial Filaments (AREA)
Abstract
The invention relates to the technical field of textile, and provides a superfine denier regenerated cellulose fiber and a preparation method thereof, wherein the linear density of the fiber is 0.33-0.55dtex, the dry breaking strength of the fiber is 2.00-2.60cN/dtex, the wet breaking strength of the fiber is 1.00-1.40cN/dtex, and the superfine denier regenerated cellulose fiber is large in specific surface area, small in bending rigidity, good in moisture absorption and air permeability, soft in hand feeling, soft and fine in gloss, excellent in quality, light and thin in texture and higher in fabric grade. The preparation method comprises the following steps: 1) Preparing an blended yarn solution; 2) Spinning and forming; 3) Refining treatment. The plasticizer and the thickener are added into the blended yarn solution, so that under the condition of ensuring that the content of cellulose is reduced, the system has high viscosity and spinnability, the fineness of the fiber variety prepared by selection is further reduced, and the water-soluble polymer substance (polyvinyl alcohol) is removed at CS 2 The recovery process is directly completed in the fiber feeding groove, thereby reducing the process of removing refined polymer substances and simplifying the production flow。
Description
Technical Field
The invention relates to the technical field of textile, in particular to a superfine denier regenerated cellulose fiber and a preparation method thereof.
Background
The development and research of fine denier of fiber is one of the research directions of fiber differentiation varieties, and is a representative of the development of chemical fiber to high technology and high simulation. The fine denier and superfine denier regenerated cellulose fiber has the advantages of large specific surface area, small bending stiffness, good moisture absorption and air permeability, soft hand feeling, soft and fine luster, suitability for processing high count yarns and high grade fabrics, excellent quality, light and thin texture and the like, and the application range of the fine denier and superfine denier regenerated cellulose fiber is wider and wider.
The wet spinning is adopted to prepare the fine denier and superfine denier cellulose fibers, the total drafting is relatively large, but is generally controlled below 180%, the total drafting is large, the dry stretching rate of the fibers is easy to be reduced, and the like, and a large number of broken yarns can be easily caused, so that the total drafting is small, the dry strength of the fibers is low, coarse fibers and doubling are easy to generate, defects are easy to be reduced, and the like. Therefore, when spinning a certain fiber variety, the effective component content of the viscose solution and the aperture of the spray nozzle are strictly calculated by the drafting process. Patent CN1418990a discloses that high-magnification draft (total draft 350-370%) with high alpha-fiber content (alpha-fiber content 8.99-9.05%, sodium hydroxide 5.53-5.6%) is adopted to produce fiber with fineness 0.56-0.22 dtex, and high-magnification draft tends to cause filament breakage, spinnability is poor, and mechanical strength index is not mentioned in the patent. Patent CN1632189A discloses a production technology of high-whiteness high-strength fine denier viscose staple fiber with fineness of 0.90-1.40 dtex; CN104790053a discloses a method for manufacturing superfine denier viscose fiber, CN108677273a discloses a method for preparing fine denier strong yarn, CN102251301a discloses a process for producing superfine denier high-strength viscose fiber, the drawing ratio is improved by changing the aperture of a spinneret, or fine denier fiber is produced by means of a high wet modulus fiber production process, and the technologies have higher requirements on raw materials, equipment and process control, so that the production cost is greatly increased. CN105780184a prepares fibers from carboxymethyl cellulose (CMC) as a raw material by an electrospinning technique. CN105133077a discloses a fine denier cellulose fiber and a preparation method thereof, wherein a functional polymer material and a cellulose solution are molded together to spin the fiber, and then the functional polymer material in the fiber is removed in a post-treatment process, so that the linear density of the fiber is reduced, and the fine denier cellulose fiber of 0.56-0.89dtex is prepared, but the fineness is only 0.56dtex at the minimum, and the functional polymer material is required to be removed independently at the subsequent step.
Disclosure of Invention
Based on the background, the invention aims to provide an ultrafine denier regenerated cellulose fiber and a preparation method thereof, which can reduce cellulose composition, ensure drafting plasticity in the spinning process of a system and ensure the drafting plasticity in a fiber feeding groove CS by adding a plasticizer and a tackifier 2 The recovery procedure is used for separating the high molecular substances from the cellulose, the removal procedure of post-treatment on the high molecular substances is reduced, the fineness of the high molecular substances can reach 0.33-0.55dtex, the fineness of the cellulose fiber is further improved, and the superfine denier regenerated cellulose fiber is developed.
The invention adopts the following technical scheme:
a superfine denier regenerated cellulose fiber has a linear density of 0.33-0.55dtex, a dry breaking strength of 2.00-2.60cN/dtex, and a wet breaking strength of 1.00-1.40cN/dtex.
The preparation method of the superfine denier regenerated cellulose fiber comprises the following steps:
(1) Preparation of blended yarn solution:
taking cellulose pulp as a raw material, and preparing cellulose xanthate through soaking, squeezing, crushing, ageing and yellowing;
adding water-soluble polymer substances, uniformly mixing, adding plasticizer and thickener, dissolving with sodium hydroxide solution, and uniformly mixing to obtain blended spinning solution;
(2) Spinning and forming:
filtering, defoaming and spinning the blended spinning solution to obtain cellulose fiber tows;
(3) Refining:
cutting off cellulose fiber tows, entering a fiber feeding groove, staying in the fiber feeding groove for a certain time, removing water-soluble polymer substances, then discharging the cellulose fiber tows out of the fiber feeding groove, and preparing the superfine denier regenerated cellulose fibers through washing, desulfurizing, bleaching, oiling and drying.
The fiber surface layer of the fiber feeding groove is subjected to the procedures of washing, desulfurizing, bleaching, oiling, drying, packaging and the like, and the specific process control can be the same as the conventional viscose fiber post-treatment process according to the need.
Further, the water-soluble polymer substance is polyvinyl alcohol, and the mass ratio of the polyvinyl alcohol to the cellulose is 10-45:90-55.
Further, the plasticizer is glycerol or polyethylene glycol.
By adding glycerol or polyethylene glycol, the molding reaction rate is improved, the intermolecular structure is stabilized, the inner and outer molding is uniform, and the buffer effect is achieved.
Further, the addition amount of glycerol or polyethylene glycol is 1-4% of the mass of cellulose.
Further, the thickener is carboxymethyl cellulose.
Further, the addition amount of the carboxymethyl cellulose is 5-10% of the mass of the cellulose.
Further, in the blended yarn solution, the total content of water-soluble high molecular substances and cellulose is 6.2-8.2%, the content of sodium hydroxide is 4.2-5.0%, and the system viscosity of the blended yarn solution is 60-90s.
Further, in the spinning forming, the temperature of a spinning forming bath is 48-52 ℃, and the components comprise 60-110g/L of sulfuric acid, 15-35g/L of zinc sulfate and 380-420g/L of sodium sulfate; 40-60% of spray head draft, 45-80% of disk draft, 9-14% of two-bath draft and total draft not higher than 180%.
Further, the heating steam pressure of the fiber feeding groove is 0.01-0.02Mpa, the water temperature in the fiber feeding groove is more than or equal to 98 ℃, and the residence time of the cut cellulose fiber tows in the fiber feeding groove is 4-9.5min.
The invention has the beneficial effects that:
the linear density of the fiber is 0.33-0.55dtex, the dry breaking strength of the fiber is 2.00-2.60cN/dtex, the wet breaking strength of the fiber is 1.00-1.40cN/dtex, and the fiber is a superfine denier regenerated cellulose fiber, and the fiber has the advantages of large specific surface area, small bending stiffness, good moisture absorption and air permeability, soft hand feeling, soft and fine luster, excellent quality, light texture and higher grade;
the plasticizer and the thickener are added into the blended yarn solution, so that under the condition of ensuring that the content of cellulose is reduced, the system has high viscosity and spinnability, the fineness of the fiber variety prepared by selection is further reduced, and the water-soluble polymer substance (polyvinyl alcohol) is removed at CS 2 The recovery process is directly completed in the fiber feeding groove, thereby reducing the process of removing refined high polymer substances and simplifying the production flow.
Drawings
FIG. 1 is a microscopic examination of the regenerated cellulose fiber and the conventional cellulose fiber in the market, which are obtained in example 1.
Detailed Description
The invention is described in detail below with reference to the attached drawings:
as one example, a superfine denier regenerated cellulose fiber, the linear density of the fiber is 0.33-0.55dtex, the dry breaking strength of the fiber is 2.00-2.60cN/dtex, and the wet breaking strength is 1.00-1.40cN/dtex.
As one example thereof, a method for preparing an ultrafine denier regenerated cellulose fiber comprises the steps of:
(1) Preparation of blended yarn solution:
taking cellulose pulp as a raw material, and preparing cellulose xanthate through soaking, squeezing, crushing, ageing and yellowing;
adding water-soluble polymer substances, uniformly mixing, adding plasticizer and thickener, dissolving with sodium hydroxide solution, and uniformly mixing to obtain blended spinning solution;
(2) Spinning and forming:
filtering, defoaming and spinning the blended spinning solution to obtain cellulose fiber tows;
(3) Refining:
cutting off cellulose fiber tows, entering a fiber feeding groove, staying in the fiber feeding groove for a certain time, removing water-soluble polymer substances, then discharging the cellulose fiber tows out of the fiber feeding groove, and finishing the preparation of the superfine denier regenerated cellulose fibers through water washing, desulfurization, bleaching, oiling, drying, packaging and the like.
As one example, further, the water-soluble polymer is polyvinyl alcohol, and the mass ratio of polyvinyl alcohol to cellulose is 10-45:90-55.
As one example thereof, further, the plasticizer is glycerol or polyethylene glycol.
As one example thereof, further, glycerol or polyethylene glycol is added in an amount of 1 to 4% by mass of cellulose.
As one example thereof, further, the thickener is carboxymethyl cellulose.
As one example thereof, further, carboxymethyl cellulose is added in an amount of 5 to 10% by mass of cellulose.
As one example, further, in the blended yarn solution, the total content of the water-soluble polymer substance and the cellulose is 6.2-8.2%, the content of the sodium hydroxide is 4.2-5.0%, and the system viscosity of the blended yarn solution is 60-90s.
As one example, further, in the spinning forming, the temperature of the spinning forming bath is 48-52 ℃, and the components comprise 60-110g/L sulfuric acid, 15-35g/L zinc sulfate and 380-420g/L sodium sulfate; 40-60% of spray head draft, 45-80% of disk draft, 9-14% of two-bath draft and total draft not higher than 180%.
As one example, further, the heating steam pressure of the fiber feeding groove is 0.01-0.02Mpa, the water temperature in the fiber feeding groove is more than or equal to 98 ℃, and the residence time of the cut cellulose fiber tows in the fiber feeding groove is 4-9.5min.
Example 1:
1) Preparation of blended yarn solution
Polyvinyl alcohol is prepared into a water-soluble solution with the mass concentration of 15%; taking cellulose pulp as a raw material, and preparing cellulose xanthate through the steps of dipping, squeezing, crushing, ageing and yellowing; the preparation method comprises the following steps of: polyvinyl alcohol=85:15 mass ratio, uniformly mixing a polyvinyl alcohol aqueous solution and cellulose xanthate, adding polyethylene glycol accounting for 2% of the mass of cellulose, adding carboxymethyl cellulose accounting for 5% of the mass of cellulose, dissolving with a sodium hydroxide solution, and uniformly mixing. The total content of polyvinyl alcohol and cellulose of the blended yarn solution is 7.26 percent, the content of sodium hydroxide is 4.62 percent and the viscosity is 76 seconds by mass.
2) Spinning and shaping
Filtering, defoaming and spinning the blended spinning solution, wherein the temperature of a spinning forming bath is 48 ℃, and the components comprise 65g/L sulfuric acid, 35g/L zinc sulfate and 380g/L sodium sulfate; spray head draft 60%, disk draft 45%, two bath draft 9.5%, total draft 157%. Cellulose fiber tows with a linear density of 0.53dtex were obtained.
3) Post-treatment
Cutting off the prepared cellulose fiber tows, feeding the cellulose fiber tows into a fiber feeding groove, heating the fiber feeding groove to steam with the pressure of 0.01Mpa, heating the water in the fiber feeding groove to the temperature of 99 ℃, and keeping the fiber in the fiber feeding groove for 8.5min. The fiber is fed out of the fiber feeding groove and subjected to the procedures of water washing, desulfurization, water washing, bleaching, oiling, drying and the like. The linear density of the obtained fiber was 0.45dtex (the microscopic test chart is shown in FIG. 1, wherein the left side is the regenerated cellulose fiber obtained in this example, the right side is the conventional cellulose fiber in the market), the dry breaking strength was 2.58cN/dtex, and the wet breaking strength was 1.26cN/dtex.
Example 2:
1) Preparation of blended yarn solution
Polyvinyl alcohol is prepared into a water-soluble solution with the mass concentration of 15%; taking cellulose pulp as a raw material, and preparing cellulose xanthate through the steps of dipping, squeezing, crushing, ageing and yellowing; the preparation method comprises the following steps of: polyvinyl alcohol=55:45 mass ratio, uniformly mixing polyvinyl alcohol aqueous solution and cellulose xanthate, adding polyethylene glycol with 3% of cellulose mass, adding carboxymethyl cellulose with 6% of cellulose mass, dissolving with sodium hydroxide solution, and uniformly mixing. The total content of polyvinyl alcohol and cellulose of the blended yarn solution is 6.23 percent, the content of sodium hydroxide is 4.28 percent and the viscosity is 65 seconds by mass.
2) Spinning and shaping
Filtering, defoaming and spinning the blended spinning solution, wherein the temperature of a spinning forming bath is 49 ℃, and the components comprise 86g/L of sulfuric acid, 26g/L of zinc sulfate and 395g/L of sodium sulfate; 42% of spray head draft, 61% of disk draft, 12% of two-bath draft and 156% of total draft. Cellulose fiber tows with a linear density of 0.61dtex were obtained.
3) Post-treatment
Cutting off the prepared cellulose fiber tows, feeding the cellulose fiber tows into a fiber feeding groove, heating the fiber feeding groove to steam with the pressure of 0.02Mpa, heating the water in the fiber feeding groove to the temperature of 99 ℃, and keeping the fiber in the fiber feeding groove for 4min. The fiber is fed out of the fiber feeding groove and subjected to the procedures of water washing, desulfurization, water washing, bleaching, oiling, drying and the like. The linear density of the fiber obtained was 0.33dtex, the dry breaking strength was 2.46cN/dtex and the wet breaking strength was 1.33cN/dtex.
Example 3:
1) Preparation of blended yarn solution
Polyvinyl alcohol is prepared into a water-soluble solution with the mass concentration of 15%; taking cellulose pulp as a raw material, and preparing cellulose xanthate through the steps of dipping, squeezing, crushing, ageing and yellowing; the preparation method comprises the following steps of: polyvinyl alcohol=90:10 mass ratio, uniformly mixing polyvinyl alcohol aqueous solution and cellulose xanthate, adding polyethylene glycol with 1% of cellulose mass, adding carboxymethyl cellulose with 8% of cellulose mass, dissolving with sodium hydroxide solution, and uniformly mixing. The total content of polyvinyl alcohol and cellulose of the blended yarn solution is 8.2 percent, the content of sodium hydroxide is 5.0 percent and the viscosity is 90 seconds by mass.
2) Spinning and shaping
Filtering, defoaming and spinning the blended spinning solution, wherein the temperature of a spinning forming bath is 49 ℃, and the components comprise 86g/L of sulfuric acid, 26g/L of zinc sulfate and 415g/L of sodium sulfate; 40% of spray head draft, 72% of disc draft, 13.5% of two-bath draft and 174% of total draft. Cellulose fiber tows with a linear density of 0.62dtex were obtained.
3) Post-treatment
Cutting off the prepared cellulose fiber tows, feeding the cellulose fiber tows into a fiber feeding groove, heating the fiber feeding groove to steam with the pressure of 0.02Mpa, heating the water in the fiber feeding groove to 100 ℃, and keeping the fiber in the fiber feeding groove for 6.5min. The fiber is fed out of the fiber feeding groove and subjected to the procedures of water washing, desulfurization, water washing, bleaching, oiling, drying and the like. The linear density of the fiber obtained was 0.55dtex, the dry breaking strength was 2.60cN/dtex and the wet breaking strength was 1.39cN/dtex.
Example 4:
1) Preparation of blended yarn solution
Polyvinyl alcohol is prepared into a water-soluble solution with the mass concentration of 15%; taking cellulose pulp as a raw material, and preparing cellulose xanthate through the steps of dipping, squeezing, crushing, ageing and yellowing; the preparation method comprises the following steps of: polyvinyl alcohol=70:30 mass ratio, uniformly mixing polyvinyl alcohol aqueous solution and cellulose xanthate, adding polyethylene glycol accounting for 4% of the mass of cellulose, adding carboxymethyl cellulose accounting for 6% of the mass of cellulose, dissolving with sodium hydroxide solution, and uniformly mixing. The total content of polyvinyl alcohol and cellulose of the blended yarn solution is 7.88 percent, the content of sodium hydroxide is 4.86 percent and the viscosity is 76 seconds.
2) Spinning and shaping
Filtering, defoaming and spinning the blended spinning solution, wherein the temperature of a spinning forming bath is 52 ℃, and the components comprise 110g/L sulfuric acid, 15g/L zinc sulfate and 420g/L sodium sulfate; spray head draft 45%, disk draft 63%, two bath draft 14%, total draft 167%. Cellulose fiber tows with a linear density of 0.59dtex were obtained.
3) Post-treatment
Cutting off the prepared cellulose fiber tows, feeding the cellulose fiber tows into a fiber feeding groove, heating the fiber feeding groove to steam with the pressure of 0.02Mpa, heating the water in the fiber feeding groove to 100 ℃, and keeping the fiber in the fiber feeding groove for 7.5min. The fiber is fed out of the fiber feeding groove and subjected to the procedures of water washing, desulfurization, water washing, bleaching, oiling, drying and the like. The linear density of the fiber obtained was 0.42dtex, the dry breaking strength was 2.23cN/dtex and the wet breaking strength was 1.19cN/dtex.
It should be understood that the above description is not intended to limit the invention to the particular embodiments disclosed, but to limit the invention to the particular embodiments disclosed, and that the invention is not limited to the particular embodiments disclosed, but is intended to cover modifications, adaptations, additions and alternatives falling within the spirit and scope of the invention.
Claims (10)
1. A superfine denier regenerated cellulose fiber is characterized in that the linear density of the fiber is 0.33-0.55dtex, the dry breaking strength of the fiber is 2.00-2.60cN/dtex, and the wet breaking strength of the fiber is 1.00-1.40cN/dtex.
2. The preparation method of the superfine denier regenerated cellulose fiber is characterized by comprising the following steps of:
(1) Preparation of blended yarn solution:
taking cellulose pulp as a raw material, and preparing cellulose xanthate through soaking, squeezing, crushing, ageing and yellowing;
adding water-soluble polymer substances, uniformly mixing, adding plasticizer and thickener, dissolving with sodium hydroxide solution, and uniformly mixing to obtain blended spinning solution;
(2) Spinning and forming:
filtering, defoaming and spinning the blended spinning solution to obtain cellulose fiber tows;
(3) Refining:
cutting off cellulose fiber tows, entering a fiber feeding groove, staying in the fiber feeding groove for a certain time, removing water-soluble polymer substances, then discharging the cellulose fiber tows out of the fiber feeding groove, and preparing the superfine denier regenerated cellulose fibers through washing, desulfurizing, bleaching, oiling and drying.
3. The method for preparing the superfine denier regenerated cellulose fiber according to claim 2, wherein the water-soluble polymer substance is polyvinyl alcohol, and the mass ratio of the polyvinyl alcohol to the cellulose is 10-45:90-55.
4. The method for preparing a superfine denier regenerated cellulose fiber according to claim 2, wherein the plasticizer is glycerol or polyethylene glycol.
5. The method for preparing ultra-fine denier regenerated cellulose fiber according to claim 4, wherein glycerol or polyethylene glycol is added in an amount of 1-4% by mass of cellulose.
6. The method for preparing ultra fine denier regenerated cellulose fiber according to claim 2, wherein said thickener is carboxymethyl cellulose.
7. The method for preparing ultra-fine denier regenerated cellulose fiber according to claim 6, wherein the added amount of carboxymethyl cellulose is 5-10% of the mass of cellulose.
8. The method for preparing ultra-fine denier regenerated cellulose fiber according to claim 2, wherein the total content of water-soluble polymer and cellulose in the blended spinning solution is 6.2-8.2%, the content of sodium hydroxide is 4.2-5.0%, and the system viscosity of the blended spinning solution is 60-90s.
9. The method for preparing ultra-fine denier regenerated cellulose fiber according to claim 2, wherein in the spinning forming, the temperature of the spinning forming bath is 48-52 ℃, and the components comprise 60-110g/L of sulfuric acid, 15-35g/L of zinc sulfate and 380-420g/L of sodium sulfate; 40-60% of spray head draft, 45-80% of disk draft, 9-14% of two-bath draft and total draft not higher than 180%.
10. The method for preparing ultra-fine denier regenerated cellulose fiber according to claim 2, wherein the heating steam pressure of the fiber feeding tank is 0.01-0.02Mpa, the water temperature in the fiber feeding tank is more than or equal to 98 ℃, and the residence time of the cut cellulose fiber tows in the fiber feeding tank is 4-9.5min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310367814.8A CN116356442A (en) | 2023-04-07 | 2023-04-07 | Superfine denier regenerated cellulose fiber and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310367814.8A CN116356442A (en) | 2023-04-07 | 2023-04-07 | Superfine denier regenerated cellulose fiber and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB775883A (en) * | 1953-09-16 | 1957-05-29 | Rayonier Inc | Improvements in viscose process and products produced thereby |
| WO2011012423A1 (en) * | 2009-07-31 | 2011-02-03 | Kelheim Fibres Gmbh | Regenerated cellulose staple fibre |
| CN105133077A (en) * | 2015-07-30 | 2015-12-09 | 恒天海龙股份有限公司 | Fine-denier cellulose fiber and preparation method thereof |
| JP2016204820A (en) * | 2015-04-27 | 2016-12-08 | ダイワボウホールディングス株式会社 | Regenerated cellulose fiber containing functional material, method for producing the same, and fiber structure containing the same |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB775883A (en) * | 1953-09-16 | 1957-05-29 | Rayonier Inc | Improvements in viscose process and products produced thereby |
| WO2011012423A1 (en) * | 2009-07-31 | 2011-02-03 | Kelheim Fibres Gmbh | Regenerated cellulose staple fibre |
| JP2016204820A (en) * | 2015-04-27 | 2016-12-08 | ダイワボウホールディングス株式会社 | Regenerated cellulose fiber containing functional material, method for producing the same, and fiber structure containing the same |
| CN105133077A (en) * | 2015-07-30 | 2015-12-09 | 恒天海龙股份有限公司 | Fine-denier cellulose fiber and preparation method thereof |
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