CN113235197B - Preparation process of rayon yarn - Google Patents
Preparation process of rayon yarn Download PDFInfo
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- CN113235197B CN113235197B CN202110480272.6A CN202110480272A CN113235197B CN 113235197 B CN113235197 B CN 113235197B CN 202110480272 A CN202110480272 A CN 202110480272A CN 113235197 B CN113235197 B CN 113235197B
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- rayon yarn
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- 229920000297 Rayon Polymers 0.000 title claims abstract description 70
- 239000002964 rayon Substances 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 239000000835 fiber Substances 0.000 claims abstract description 114
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 239000002994 raw material Substances 0.000 claims abstract description 49
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 33
- 238000001035 drying Methods 0.000 claims abstract description 25
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 238000002791 soaking Methods 0.000 claims abstract description 16
- 238000009987 spinning Methods 0.000 claims abstract description 13
- 238000004140 cleaning Methods 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims description 27
- 238000005406 washing Methods 0.000 claims description 22
- 238000004321 preservation Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 6
- 230000002045 lasting effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 27
- 238000010521 absorption reaction Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 10
- 229920000742 Cotton Polymers 0.000 description 9
- 239000004744 fabric Substances 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 8
- 238000003756 stirring Methods 0.000 description 8
- 229920001817 Agar Polymers 0.000 description 7
- 239000008272 agar Substances 0.000 description 7
- 239000002609 medium Substances 0.000 description 7
- 229920000728 polyester Polymers 0.000 description 7
- FOIXSVOLVBLSDH-UHFFFAOYSA-N Silver ion Chemical compound [Ag+] FOIXSVOLVBLSDH-UHFFFAOYSA-N 0.000 description 6
- 229920002678 cellulose Polymers 0.000 description 6
- 239000001913 cellulose Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000002688 persistence Effects 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000000845 anti-microbial effect Effects 0.000 description 5
- 230000003385 bacteriostatic effect Effects 0.000 description 5
- 230000003115 biocidal effect Effects 0.000 description 5
- 239000008236 heating water Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- 239000010703 silicon Substances 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 238000001179 sorption measurement Methods 0.000 description 5
- 241000894006 Bacteria Species 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 238000009960 carding Methods 0.000 description 4
- 238000002474 experimental method Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 150000003242 quaternary ammonium salts Chemical class 0.000 description 4
- -1 silicon quaternary ammonium salt Chemical class 0.000 description 4
- 239000000203 mixture Substances 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 229920001661 Chitosan Polymers 0.000 description 2
- 239000004599 antimicrobial Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000001963 growth medium Substances 0.000 description 2
- 238000007602 hot air drying Methods 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- 241000609240 Ambelania acida Species 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 241000191967 Staphylococcus aureus Species 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000010905 bagasse Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 230000002844 continuous effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011534 incubation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004627 regenerated cellulose Substances 0.000 description 1
- 238000011218 seed culture Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000000527 sonication Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/44—Yarns or threads characterised by the purpose for which they are designed
- D02G3/449—Yarns or threads with antibacterial properties
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06B—TREATING TEXTILE MATERIALS USING LIQUIDS, GASES OR VAPOURS
- D06B13/00—Treatment of textile materials with liquids, gases or vapours with aid of vibration
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/44—Oxides or hydroxides of elements of Groups 2 or 12 of the Periodic Table; Zincates; Cadmates
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
- D06M15/01—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with natural macromolecular compounds or derivatives thereof
- D06M15/03—Polysaccharides or derivatives thereof
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M16/00—Biochemical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. enzymatic
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M2101/00—Chemical constitution of the fibres, threads, yarns, fabrics or fibrous goods made from such materials, to be treated
- D06M2101/02—Natural fibres, other than mineral fibres
- D06M2101/04—Vegetal fibres
- D06M2101/06—Vegetal fibres cellulosic
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/20—Cellulose-derived artificial fibres
- D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
- D10B2201/24—Viscose
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Microbiology (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The application relates to the field of spinning, and particularly discloses a preparation process of rayon yarn. The preparation process comprises the following steps: s1: cleaning; s2: pretreatment: heating the short fiber raw material to 90-120 ℃, adding water accounting for 2-6% of the mass of the short fiber raw material, preserving the heat for 10-30min to obtain pretreated short fiber, and continuously preserving the heat; s3: and (3) antibacterial treatment: adding an antibacterial solution into the pretreated short fibers, preserving heat, soaking for 30-60min, and drying to obtain antibacterial short fibers; s4: spinning; the antibacterial liquid comprises the following components in parts by weight: 100 parts of water; 1-4 parts of an antibacterial component; the antibacterial components comprise the following components in parts by mass of 1: (0.1-0.3) and an antibacterial agent A, wherein the antibacterial agent A is at least one of a natural antibacterial agent and an inorganic antibacterial agent. The preparation method has the advantages of improving the adhesion of the antibacterial agent on the yarn and improving the lasting antibacterial effect of the product in the morning.
Description
Technical Field
The application relates to the field of spinning, in particular to a preparation process of rayon yarn.
Background
The rayon yarn is a yarn spun from rayon and belongs to regenerated cellulose fiber. The artificial cotton generally refers to viscose staple fiber (made of cotton linters, wood pulp and bagasse as raw materials), and has good hygroscopicity and soft hand feeling.
With the increase of the consumption level of people, the cloth made of simple rayon yarn can not meet the requirements, and a large number of yarns and cloth with various effects, such as moisture absorption, warming, wear resistance, pollution resistance, bacteria resistance and the like, appear on the market. The preparation method comprises the following steps of preparing an antibacterial agent into an aqueous solution, directly soaking, and drying and shaping to obtain the antibacterial yarn and cloth.
In the related technologies, the adhesion of the antibacterial agent to the yarn or cloth is poor, the antibacterial performance is greatly reduced in the later stage of multiple times of washing, and the antibacterial effect is poor in persistence.
Disclosure of Invention
In order to improve the adhesion of an antibacterial agent on yarns and improve the durability of the antibacterial effect of products, the application provides a preparation process of the rayon yarns.
The application provides the following technical scheme: a preparation process of rayon yarn comprises the following steps:
s1: cleaning: washing viscose staple fibers with water, and drying to obtain a staple fiber raw material;
s2: pretreatment: heating the short fiber raw material to 90-120 ℃, adding water accounting for 2-6% of the mass of the short fiber raw material, preserving the heat for 10-30min to obtain pretreated short fiber, and continuously preserving the heat;
s3: and (3) antibacterial treatment: adding an antibacterial solution into the pretreated short fibers, preserving heat, soaking for 30-60min, and drying to obtain antibacterial treated short fibers;
s4: spinning;
the antibacterial liquid comprises the following components in parts by weight:
100 parts of water;
1-4 parts of an antibacterial component;
the antibacterial component comprises the following components in parts by mass: (0.1-0.3) and an antibacterial agent A, wherein the antibacterial agent A is at least one of a natural antibacterial agent and an inorganic antibacterial agent.
By adopting the technical scheme, before spinning, the fiber short fiber is cleaned, pretreated and subjected to antibacterial treatment. Pretreating, namely heating the viscose staple fibers to the temperature of 90-120 ℃, and selecting an organic silicon quaternary ammonium salt antibacterial agent from the antibacterial components of the complex; in addition, in the pretreatment, after the short fiber raw material is heated, water is introduced into the short fiber raw material, so that the moisture absorption of the viscose fiber is controlled to a certain degree. As is clear from the test, the maintenance of the antibacterial effect after washing with water can be significantly improved, and the adhesion of the antibacterial substance to the fabric can be improved.
Further, the step S2: heating the short fiber raw material to 90-120 ℃, adding water in the form of water vapor, and obtaining the pretreated short fiber after the water vapor is added in 10-30 min.
By adopting the technical scheme, water is added in a form of water vapor, the temperature of the water when the water is contacted with the short fiber raw material is kept, on the other hand, the distance between water molecules is reduced, the adsorption degree of the water is improved, the precision of the process for adjusting the moisture absorption degree of the short fiber raw material is improved, and therefore the adsorption effect of the subsequent antibacterial treatment is improved. As is apparent from the test, the maintenance of the antibacterial effect after washing can be further improved, and the adhesion of the antibacterial substance to the fabric can be improved.
Further, in the step S2, the water consumption accounts for 2.5-3% of the mass of the short fiber raw material.
By adopting the technical scheme, experiments show that the maintenance of the antibacterial effect after washing can be further improved, and the adhesiveness of the antibacterial substance on the cloth can be improved.
Further, in the step S2, after the water vapor is added for 10-30min, the mixture is dried for 1-2min under the hot air of 60-80 ℃ to obtain the pretreated short fibers.
Through adopting above-mentioned technical scheme, will remain the moisture on short fiber surface and take away, keep fibre surface dry, can know from the experiment, be favorable to the improvement of adhesion.
Further, the step S3: adding an antibacterial liquid into the pretreated short fibers, soaking for 30-60min under heat preservation, cooling to 10-40 ℃, and drying to obtain the antibacterial short fibers.
By adopting the technical scheme, experiments show that the maintenance of the antibacterial effect after washing can be further improved, and the improvement of the adhesiveness is facilitated.
Further, the cooling rate in the step S3 is 5-10 ℃/min.
By adopting the technical scheme, experiments show that the maintenance of the antibacterial effect after washing can be further improved, and the improvement of the adhesiveness is facilitated.
Furthermore, in the step S2, the short fiber raw material is stirred at the speed of 5-30 r/min.
By adopting the technical scheme, the moisture absorption uniformity and the moisture absorption efficiency of the viscose fibers are improved, so that the uniformity and the stability of the antibacterial treatment of the viscose fibers in the same batch are improved.
Furthermore, in the step S2, ultrasonic vibration is matched, and the vibration frequency is 20-33KHz.
By adopting the technical scheme, the moisture absorption uniformity and the moisture absorption efficiency of the viscose fibers are improved, so that the uniformity and the stability of the antibacterial treatment of the viscose fibers in the same batch are improved.
In summary, the present application has the following beneficial effects:
1. because this application adopts the preliminary treatment step to cooperate antibiotic liquid to control viscose's hygroscopicity, can show the maintenance that improves antibiotic effect after the washing, improve the adhesion of antibiotic substance on the cloth.
2. Because this application will add the water in the preliminary treatment with the form of vapor, can further improve the maintenance of washing back antibiotic effect, improve the adhesion of antibiotic substance on the cloth.
3. According to the method, the hot air drying is carried out after the water vapor is added, so that the adhesion is improved.
4. In the step S3, after soaking for 30-60min under heat preservation, the temperature is reduced to 10-40 ℃, and the antibacterial short fiber is obtained after drying; the maintenance of the antibacterial effect after washing can be further improved, which is favorable for the improvement of the adhesiveness.
Detailed Description
Examples
Example 1: a preparation process of rayon yarn comprises the following steps:
s1: cleaning: putting the viscose staple fibers into a stirrer, introducing clear water until the viscose staple fibers are immersed in the clear water, starting stirring at the stirring speed of 20r/min, cleaning for 10min, taking out, and drying in a50 ℃ oven to obtain staple fiber raw materials;
s2: pretreatment: putting the short fiber raw material into a heating pot, heating to 90 ℃, adding water accounting for 2% of the mass of the short fiber raw material, preserving heat for 30min to obtain pretreated short fiber, and continuously preserving heat;
s3: and (3) antibacterial treatment: adding an antibacterial solution into the pretreated short fibers, preserving heat, soaking for 30min, and drying in a50 ℃ oven to obtain the antibacterial short fibers; the antibacterial liquid is obtained by mixing 100kg of water and 1kg of antibacterial liquid for 5min at the temperature of 20 +/-5 ℃ and at the speed of 50r/min, and the antibacterial liquid consists of an organosilicon quaternary ammonium salt antibacterial agent and an antibacterial agent A with the mass ratio of 1; the antibacterial agent A is a silver ion antibacterial agent.
S4: spinning: cotton carding, drawing, roving and spinning are carried out to obtain the rayon yarn;
carding cotton: putting the antibacterial short fibers into a carding machine (Henan Hongyu Shunchang textile Limited-SCH-IIII standard type opening and carding integrated environment-friendly fine cotton fluffer), wherein the rotating speed of a cylinder is 330r/min, the rotating speed of a licker-in is 800r/min, the linear speed of a cover plate is 81mm/min, and the ration of raw strips is 18g/5m;
drawing: putting the cotton carded viscose staple fibers into a drawing frame (Shaanxi Bao new textile machinery Co., ltd.) -a high-speed drawing frame FA320A with the drawing speed of 130m/min, the first quantity of 17g/5m and the last quantity of 16g/5m; the posterior region drafted the head 1.7 times, and the end 1.35 times.
Roving: after drawing, a roving frame (a Qingdao Jinhufeng mechanical Co., ltd. -JHF1477/JHF1478 three-axis non-differential full-servo computer cotton spinning roving frame) is introduced, the roving twist coefficient is 70, the roving ration is 4.5g/m, the roller spacing distance is 25 x 33mm, and the roving spindle speed is 580r/min.
Spinning: and after the roving is finished, introducing a spinning machine (FA 506 spinning machine of Shanxi warp and weft textile machinery Co., ltd.), wherein the spinning twist coefficient is 395 and the spindle speed is 13300r/min.
The viscose staple fibers are purchased from Yingyue fluff Co., ltd, 1.5DX38mm pure viscose staple fibers.
The silicone quaternary ammonium salt antimicrobial agent was purchased from AEM5700, and the silver ion antimicrobial agent was purchased from GNCE5700-A, both from Jianice.
Example 2: a process for preparing rayon yarn, which differs from example 1 in that:
s1: cleaning: putting the viscose staple fibers into a stirrer, introducing clear water until the viscose staple fibers are immersed in the clear water, starting stirring at a stirring speed of 20r/min, cleaning for 10min, taking out, and drying in a50 ℃ oven to obtain a staple fiber raw material;
s2: pretreatment: putting the short fiber raw material into a heating pot, heating to 100 ℃, adding water accounting for 4% of the mass of the short fiber raw material, preserving heat for 13min to obtain pretreated short fiber, and continuously preserving heat;
s3: and (3) antibacterial treatment: adding an antibacterial solution into the pretreated short fibers, preserving heat, soaking for 40min, and drying in a50 ℃ oven to obtain the antibacterial treated short fibers; the antibacterial liquid is obtained by mixing 100kg of water and 3kg of antibacterial liquid for 5min at the temperature of 20 +/-5 ℃ and at the speed of 50r/min, and the antibacterial liquid consists of an organosilicon quaternary ammonium salt antibacterial agent and an antibacterial agent A with the mass ratio of 1; the antibacterial agent A consists of a silver ion antibacterial agent and chitosan in a mass part ratio of 1.
Example 3: a process for preparing rayon yarn, which differs from example 1 in that:
s1: cleaning: putting the viscose staple fibers into a stirrer, introducing clear water until the viscose staple fibers are immersed in the clear water, starting stirring at the stirring speed of 20r/min, cleaning for 10min, taking out, and drying in a50 ℃ oven to obtain staple fiber raw materials;
s2: pretreatment: putting the short fiber raw material into a heating pot, heating to 120 ℃, adding water accounting for 6% of the mass of the short fiber raw material, preserving heat for 10min to obtain pretreated short fiber, and continuously preserving heat;
s3: and (3) antibacterial treatment: adding an antibacterial solution into the pretreated short fibers, preserving heat, soaking for 60min, and drying in a50 ℃ oven to obtain the antibacterial short fibers; the antibacterial liquid is obtained by mixing 100kg of water and 4kg of antibacterial liquid for 5min at the temperature of 20 +/-5 ℃ and at the speed of 50r/min, and the antibacterial liquid consists of an organosilicon quaternary ammonium salt antibacterial agent and an antibacterial agent A with the mass ratio of 1; the antibacterial agent A comprises a silver ion antibacterial agent, zinc oxide and chitosan, wherein the mass part ratio of the silver ion antibacterial agent to the zinc oxide is 0.5.
Example 4: a process for preparing rayon yarn, which differs from example 2 in that:
s2: pretreatment: adding the short fiber raw material into a heating pot, heating to 120 ℃, heating water to convert into steam, adding into the short fiber raw material, adding for 13min to obtain pretreated short fiber, and keeping the temperature.
Example 5: a process for preparing rayon yarn, which differs from example 4 in that: the steam addition in step S2 was completed within 10 minutes.
Example 6: a process for preparing rayon yarn, which differs from example 4 in that: the addition of water vapor in step S2 was completed within 30 minutes.
Example 7: a process for preparing rayon yarn, which differs from example 4 in that: the water vapor adding amount in the step S2 is 2.5 percent of the consumption of the short fiber raw material.
Example 8: a process for preparing rayon yarn, which differs from example 4 in that: the water vapor adding amount in the step S2 is 3% of the short fiber raw material.
Example 9: a process for preparing rayon yarn, which differs from example 8 in that:
s2: pretreatment: adding staple fiber raw material into a heating pot, heating to 120 deg.C, heating water to convert into steam, adding into staple fiber raw material, adding for 13min, drying with 60 deg.C hot air for 2min to obtain pretreated staple fiber, and keeping the temperature.
Example 10: a process for preparing rayon yarn, which differs from example 9 in that: in step S2, after the water vapor is added, drying for 1min by hot air at 80 ℃ to obtain the pretreated short fibers.
Example 11: a process for preparing rayon yarn, which differs from example 10 in that: in step S2, after the water vapor is added, drying is carried out for 1min by hot air at 95 ℃ to obtain the pretreated short fibers.
Example 12: a process for preparing rayon yarn, which differs from example 10 in that: in step S2, after the water vapor is added, drying for 1min by hot air at 40 ℃ to obtain the pretreated short fibers.
Example 13: a process for preparing rayon yarn, which differs from example 10 in that:
s3: and (3) antibacterial treatment: adding an antibacterial solution into the pretreated short fibers, soaking for 40min under heat preservation, cooling to 10 ℃, wherein the cooling rate is 1-2 ℃/min, and drying in a50 ℃ oven to obtain the antibacterial treated short fibers.
Example 14: a process for preparing rayon yarn, which differs from example 13 in that: in the step S3, after the heat preservation and the soaking for 40min, the temperature is reduced to 30 ℃, and the temperature reduction rate is 20 +/-1 ℃/min.
Example 15: a process for preparing rayon yarn, which differs from example 13 in that: in the step S3, after the heat preservation and the soaking for 40min, the temperature is reduced to 40 ℃, and the temperature reduction rate is 15 +/-1 ℃/min.
Example 16: a process for preparing rayon yarn, which differs from example 13 in that: in the step S3, after the heat preservation and the soaking for 40min, the temperature is reduced to 30 ℃, and the temperature reduction rate is 5 +/-1 ℃/min.
Example 17: a process for preparing rayon yarn, which differs from example 13 in that: in the step S3, after the heat preservation and the soaking for 40min, the temperature is reduced to 30 ℃, and the temperature reduction rate is 10 +/-1 ℃/min.
Example 18: a process for preparing rayon yarn, which differs from example 16 in that:
s2: pretreatment: putting the short fiber raw material into a heating pot, heating to 120 ℃, heating water to convert the water into steam, adding the steam into the short fiber raw material, after the short fiber raw material is added for 13min, keeping the stirring speed of 5r/min in the adding process, and matching with 20KHz ultrasonic vibration; drying with hot air of 80 deg.C for 1min after the addition of water vapor to obtain pretreated staple fiber, and maintaining the temperature.
Example 19: a process for preparing rayon yarn, which differs from example 16 in that:
s2: pretreatment: putting the short fiber raw material into a heating pot, heating to 120 ℃, heating water to convert the water into steam, adding the steam into the short fiber raw material, and keeping the stirring speed of 30r/min in the adding process after the short fiber raw material is added for 13 min; drying with hot air of 80 deg.C for 1min after the addition of water vapor to obtain pretreated staple fiber, and maintaining the temperature.
Example 20: a process for preparing rayon yarn, which differs from example 16 in that:
s2: pretreatment: putting the short fiber raw material into a heating pot, heating to 120 ℃, heating water to convert the water into steam, adding the steam into the short fiber raw material, adding the short fiber raw material for 13min, and matching with 33KHz ultrasonic vibration in the adding process; drying with hot air of 80 deg.C for 1min after the addition of water vapor to obtain pretreated staple fiber, and maintaining the temperature.
Comparative example
Comparative example 1: a process for preparing rayon yarn, which is different from example 1 in that the cleaned staple fiber raw material is directly subjected to an antibacterial treatment without performing step S2.
Comparative example 2: the difference between the preparation process of the rayon yarn and the embodiment 1 is that the antibacterial component is a silver ion antibacterial agent.
Comparative example 3: a process for preparing rayon yarn, which differs from example 1 in that:
s2: pretreatment: putting the short fiber raw material into a mixing pot, adding water accounting for 2% of the mass of the short fiber raw material, preserving the heat for 30min to obtain pretreated short fiber, and continuously preserving the heat.
Comparative example 4: a process for preparing rayon yarn, which differs from example 1 in that:
s2: pretreatment: and (3) putting the short fiber raw material into a heating pot, heating to 90 ℃, adding to obtain the pretreated short fiber, and keeping the temperature continuously.
Characterization test:
1. duration test of antibacterial Effect
Test subjects: examples 1-20 and comparative examples 1-4, for a total of 25 test samples.
The test method comprises the following steps: and intercepting the cotton yarns of 10cm long from the middle section of each test sample, arranging three parallel samples for each test sample, and marking. The test sample is firstly subjected to an antibacterial test to obtain an initial antibacterial value, and then is subjected to the antibacterial test again after being washed for 1 time, 5 times and 10 times.
Washing with water: a washing machine (Mei HB 100-C1H) was prepared, and one mesh bag was used for each set of test specimens. And correspondingly putting each group of test samples into the mesh bags, tightening the openings, throwing the mesh bags into a washing machine, washing according to a standard program, and airing at 25 ℃ after washing to finish primary washing.
And (3) antibacterial testing: staphylococcus aureus was selected as the test bacterium. The lower sterile medium was prepared first. 10mL of agar medium was poured into a sterile plate and allowed to clot. Then, the upper layer of the seed culture medium is prepared. 150mL of agar medium at 45 +/-2 ℃ is put into a flask, and 1mL of test bacterium liquid is added. The flask was shaken to distribute the bacteria evenly, 5mL of each plate was poured and allowed to coagulate. The inoculated agar culture medium is used within 1 h. The test samples were rounded end to end with sterile forceps and placed in the center of the plane and pressed evenly against the agar medium with sterile forceps until there was good contact between the test sample and the agar medium. Immediately after placing the test sample on the agar medium, the sample was placed in an incubator at 37 ℃. + -. 2 ℃ for 20 hours, ensuring that the sample and the agar medium remained in contact throughout the incubation period.
The measuring point of each test sample is the middle of the length direction of the rayon yarn, and the ratio of the width of the outer circle of the bacteriostatic belt surrounded by the rayon yarn to the width of the inner circle of the rayon yarn to the diameter of the circle surrounded by the rayon yarn of the test sample is calculated according to the following formula. Wherein the width of the outer circle bacteriostatic zone and the width of the inner circle bacteriostatic zone are the average values of two parallel samples. And (3) testing and recording the ratio of the width of the out-of-circle antibacterial band to the diameter of a circle formed by the rayon through the antibacterial test after washing, and calculating the difference value between H2 and the initial H2 after washing for 10 times.
H1＝(D1-d)/d*％；H2＝(D2-d)/d*％；
In the formula: d, the diameter of a circle formed by the polyester yarn in millimeter (mm);
d1, the outer diameter of a circular outer antibacterial belt formed by the polyester yarns in millimeter (mm);
d2, the outer diameter of an inner circle antibacterial belt formed by the polyester yarns in millimeter (mm);
h1, the proportion of the width of the round outer bacteriostatic belt formed by the polyester yarns to the diameter of the round formed by the polyester yarns is millimeter (mm); h2, the ratio of the width of the bacteriostatic zone in a circle formed by the polyester yarns to the diameter of the circle formed by the polyester yarns is millimeter (mm).
And (3) test results: the results of the antibacterial effect durability test are reported in table 1.
TABLE 1 antibacterial effectiveness duration test results
And (3) data analysis: the initial values of H1 and H2 allow the rate of adhesion of the antimicrobial composition to the cotton wool to be evaluated, with the same antimicrobial composition, the greater the values of H1 and H2, the better the rate of adhesion. The difference between the H2 after washing and the initial H2 can be used for evaluating the antibacterial property continuity of the test sample, and the smaller the difference is, the better the antibacterial property continuity is.
As can be seen from the data in Table 1, the adhesion rate is, in order from good to bad: examples 9-20, examples 4-8, comparative examples 1-4. The antibacterial persistence is as follows from excellent to poor: examples 18-19, examples 16-17, examples 13-15, examples 7-12, examples 4-6, examples 1-3, comparative examples 3-4, and comparative examples 1-2.
Comparing example 1 with comparative examples 1 to 4, it is known that the pretreatment in step S2, the heating in the pretreatment, and the addition of water in the pretreatment can improve the antimicrobial substance adhesion rate of the rayon yarn product and the durability of the antimicrobial property after washing with water; the reasons may be: the pretreatment is to heat the viscose staple fibers to the temperature of 90-120 ℃, and at the moment, the cellulose molecular chains gradually start to move and unfold due to high temperature, so that the cellulose molecular chains are in an unfolded state; the organic silicon quaternary ammonium salt antibacterial agent with larger volume is selected in the antibacterial component, and the main chain and silicon of the organic silicon quaternary ammonium salt can enter the cellulose molecular chain more easily to realize winding under the state that the cellulose molecular chain is stretched. Water is introduced into the short fiber raw material, the moisture absorption degree of the viscose fiber is controlled to a certain degree, and then the viscose fiber is soaked in the antibacterial treatment, so that better adhesion and continuous effects can be obtained.
Examples 4 to 6, which limit the addition of water in the form of water vapor on the basis of example 2, and examples 7 to 8, which limit the amount of water used on the basis of example 4, all further improve the adhesion rate and the persistence of the antibacterial effect; the reasons may be: the water is added in the form of water vapor, the temperature of the water when the water is contacted with the short fiber raw material is kept, on the other hand, the inter-molecular distance of the water is reduced, the adsorption degree of the water is improved, and the precision of the process for adjusting the moisture absorption degree of the short fiber raw material is improved.
Examples 9 to 12 add hot air drying to example 8, especially examples 9 to 10, further improving the adhesion rate and the persistence of the antibacterial effect; the reasons may be: drying the fiber surface can improve the initial adsorption rate during soaking, thereby improving the overall adsorption amount.
Examples 13-17 increased the temperature reduction on the basis of example 10, especially examples 16-17, further improved the adhesion rate and the persistence of the antibacterial effect; the reasons may be: the temperature reduction can cause the cellulose molecular chain to curl, further improves the adhesive strength of the cellulose and the organic silicon quaternary ammonium salt antibacterial agent, and improves the continuity of the antibacterial effect after washing.
Examples 19-20 add agitation and/or sonication to example 16, further improving the adhesion rate and persistence of the antimicrobial effect; the uniformity and the moisture absorption efficiency of the viscose fibers are improved, so that the uniformity and the stability of the antibacterial treatment of the viscose fibers in the same batch are improved.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (6)
1. The preparation process of the rayon yarn is characterized by comprising the following steps of:
s1: cleaning: washing viscose staple fibers with water, and drying to obtain a staple fiber raw material;
s2: pretreatment: heating the short fiber raw material to 90-120 ℃, adding water accounting for 2-6% of the mass of the short fiber raw material, adding the water in the form of water vapor, finishing the addition of the water vapor in 10-30min, drying for 1-2min under hot air at 60-80 ℃ after the addition is finished, obtaining pretreated short fibers, and continuously preserving heat;
s3: and (3) antibacterial treatment: adding an antibacterial solution into the pretreated short fibers, preserving heat, soaking for 30-60min, and drying to obtain antibacterial short fibers;
s4: spinning;
the antibacterial liquid comprises the following components in parts by weight:
100 parts of water;
1-4 parts of an antibacterial component;
the antibacterial component comprises the following components in parts by mass: (0.1-0.3) and an antibacterial agent A, wherein the antibacterial agent A is at least one of a natural antibacterial agent and an inorganic antibacterial agent.
2. The process for preparing rayon yarn according to claim 1, wherein in step S2, the amount of water is 2.5-3% by mass of the staple fiber raw material.
3. The process for preparing rayon yarn according to claim 2, wherein said step S3: adding an antibacterial liquid into the pretreated short fibers, soaking for 30-60min under heat preservation, cooling to 10-40 ℃, and drying to obtain the antibacterial short fibers.
4. The process for preparing rayon yarn according to claim 3, wherein the cooling rate in step S3 is 5-10 ℃/min.
5. The process for preparing rayon yarn according to claim 1, wherein in step S2, the staple fiber raw material is stirred at a speed of 5-30 r/min.
6. The process for preparing rayon yarn according to claim 1, wherein in step S2, ultrasonic vibration is applied, with a vibration frequency of 20-33KHz.
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| CN110373895B (en) * | 2019-08-05 | 2021-09-28 | 南通大学 | Preparation method of silver-loaded antibacterial viscose fiber |
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| CN110629565A (en) * | 2019-08-26 | 2019-12-31 | 徐州锦业纺织科技有限公司 | After-finishing process of rayon yarn |
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| CN110714326A (en) * | 2019-11-23 | 2020-01-21 | 安徽省锦元纺织品科技有限公司 | Treatment method for improving use characteristics of viscose fibers |
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| CN109056092A (en) * | 2018-07-23 | 2018-12-21 | 澳洋集团有限公司 | A kind of preparation method of antimicrobial form short rayon fiber |
| CN112482015A (en) * | 2020-11-09 | 2021-03-12 | 江苏亿茂滤材有限公司 | Antibacterial and antiviral non-woven fabric and preparation method thereof |
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