CN114302985A - Acrylic fiber, spun yarn and knitted fabric comprising same - Google Patents
Acrylic fiber, spun yarn and knitted fabric comprising same Download PDFInfo
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- CN114302985A CN114302985A CN202080059500.6A CN202080059500A CN114302985A CN 114302985 A CN114302985 A CN 114302985A CN 202080059500 A CN202080059500 A CN 202080059500A CN 114302985 A CN114302985 A CN 114302985A
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- 229920002972 Acrylic fiber Polymers 0.000 title claims abstract description 47
- 239000004744 fabric Substances 0.000 title claims description 34
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 28
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 24
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical group C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000000178 monomer Substances 0.000 claims abstract description 16
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 11
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 11
- 239000011164 primary particle Substances 0.000 claims abstract description 7
- 239000000835 fiber Substances 0.000 claims description 40
- 229920000742 Cotton Polymers 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 description 22
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 15
- 238000009987 spinning Methods 0.000 description 12
- 238000000034 method Methods 0.000 description 11
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 10
- 239000002904 solvent Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 238000002166 wet spinning Methods 0.000 description 6
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 5
- 238000010557 suspension polymerization reaction Methods 0.000 description 5
- 238000009835 boiling Methods 0.000 description 4
- 230000001112 coagulating effect Effects 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 239000007900 aqueous suspension Substances 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 2
- 230000006750 UV protection Effects 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000009940 knitting Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- VGTPCRGMBIAPIM-UHFFFAOYSA-M sodium thiocyanate Chemical compound [Na+].[S-]C#N VGTPCRGMBIAPIM-UHFFFAOYSA-M 0.000 description 2
- SZHIIIPPJJXYRY-UHFFFAOYSA-M sodium;2-methylprop-2-ene-1-sulfonate Chemical compound [Na+].CC(=C)CS([O-])(=O)=O SZHIIIPPJJXYRY-UHFFFAOYSA-M 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- WYFUZXBQKVIPQF-UHFFFAOYSA-N (prop-2-enoylamino)methyl propane-1-sulfonate;sodium Chemical compound [Na].CCCS(=O)(=O)OCNC(=O)C=C WYFUZXBQKVIPQF-UHFFFAOYSA-N 0.000 description 1
- JHUFGBSGINLPOW-UHFFFAOYSA-N 3-chloro-4-(trifluoromethoxy)benzoyl cyanide Chemical compound FC(F)(F)OC1=CC=C(C(=O)C#N)C=C1Cl JHUFGBSGINLPOW-UHFFFAOYSA-N 0.000 description 1
- 206010004542 Bezoar Diseases 0.000 description 1
- 206010016322 Feeling abnormal Diseases 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZMYZKNHXZLWPEB-UHFFFAOYSA-N [O--].[O--].[O--].[O--].[O--].[O--].[Ti+4].[Ti+4].[Ti+4] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Ti+4].[Ti+4].[Ti+4] ZMYZKNHXZLWPEB-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009960 carding Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000001891 gel spinning Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000010954 inorganic particle Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002074 melt spinning Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000007712 rapid solidification Methods 0.000 description 1
- 239000011163 secondary particle Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- XESUCHPMWXMNRV-UHFFFAOYSA-M sodium;2-ethenylbenzenesulfonate Chemical compound [Na+].[O-]S(=O)(=O)C1=CC=CC=C1C=C XESUCHPMWXMNRV-UHFFFAOYSA-M 0.000 description 1
- 125000000542 sulfonic acid group Chemical group 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 210000002268 wool Anatomy 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/18—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polymers of unsaturated nitriles, e.g. polyacrylonitrile, polyvinylidene cyanide
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/28—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/38—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from copolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds comprising unsaturated nitriles as the major constituent
-
- 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
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
- D01F6/54—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polymers of unsaturated nitriles
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04B—KNITTING
- D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
- D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
- D04B1/16—Other fabrics or articles characterised primarily by the use of particular thread materials synthetic threads
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Artificial Filaments (AREA)
- Knitting Of Fabric (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
Specifically, an acrylic fiber having a triangular cross-sectional shape and containing titanium oxide in an amount of 0.3 to 1.9 mass% inclusive and having a triangular cross-sectional shape, preferably an acrylic fiber comprising 90 to 98 mass% of acrylonitrile units and 2 to 10 mass% of vinyl monomer units, having a knot strength and a knot elongation (K product) of 10 to 35 inclusive, and having a primary particle diameter of 0.1 to 1.0 [ mu ] m inclusive is provided.
Description
Technical Field
The present invention relates to an acrylic fiber, and a spun yarn and a knitted fabric comprising the same.
Background
Acrylic fibers exhibit a soft touch, heat retention, bulkiness, and excellent heat retention, which are most similar to those of wool, as compared with other conventional synthetic fibers, and are widely used for clothing applications such as sweaters and interior decoration applications such as carpets. However, woven and knitted acrylic fibers have a practical disadvantage that fuzz, short fuzz, and the like are easily entangled on the surface thereof to generate fuzz balls called pilling, and the appearance is remarkably impaired to lower the merchantability. Against the background of such a situation, many proposals have been made to prevent the occurrence of pilling.
For example, patent document 1 proposes an acrylic fiber having improved pilling resistance, which is composed of 94.0 mass% or more of acrylonitrile units, 4.0 to 5.8 mass% of vinyl monomer units other than acrylonitrile units, and 0.2 to 2.0 mass% of sulfonic acid group-containing vinyl monomer units, and which has a triangular cross-sectional shape.
On the other hand, thin clothing products such as sweaters and knitwear, which are used as outer clothing in spring and summer, are required to have ultraviolet shielding properties and anti-permeability for preventing tanning. As a method for imparting ultraviolet shielding properties and gas barrier properties to fibers, a method of mixing inorganic particles has been proposed.
For example, patent document 2 proposes an acrylic fiber having improved ultraviolet-shielding properties by containing 2 to 7 mass% of titanium oxide having an average secondary particle diameter of 100nm or more and 180nm or less.
For example, patent document 3 proposes an acrylonitrile polymer fiber having excellent brightness and gloss, low dust-absorbing property, excellent contamination resistance, and a sharp triangular cross section at each corner.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2008-285778
Patent document 2: japanese patent laid-open publication No. 2018-53378
Patent document 3: japanese examined patent publication No. 39-22688
Disclosure of Invention
Problems to be solved by the invention
However, the method described in patent document 1 can improve the pilling resistance, but does not suggest the inclusion of titanium oxide, and cannot expect the ultraviolet shielding effect.
In patent document 2, since titanium oxide has a small particle size, secondary aggregation is likely to occur, and there is a problem that the content of titanium oxide in the fiber is large, which causes deterioration in spinning performance and the like. Further, patent document 2 has a problem that fly occurs in a carding step when processing into a spun yarn, and therefore, the knot strength is improved, and the pilling resistance which decreases the knot strength cannot be expected.
Although patent document 3 contains a small amount of titanium oxide, it is considered that the ultraviolet ray prevention effect is insufficient in the case of the amount, and patent document 3 aims to reduce the content of titanium oxide because the problem is to provide brightness and gloss, and thus the ultraviolet ray prevention effect cannot be expected. Patent document 3 describes the nodule strength and nodule elongation, but the product (K product) thereof is large, and the pilling resistance is problematic, and a method for adjusting the nodule strength and nodule elongation is not described, and therefore improvement of the pilling resistance cannot be expected.
The invention aims to provide an acrylic fiber having a triangular cross-sectional shape which can obtain excellent ultraviolet shielding performance and pilling resistance when being made into a knitted fabric, and to provide a knitted fabric comprising the fiber and having excellent ultraviolet shielding performance and pilling resistance.
Means for solving the problems
The gist of the present invention is as follows.
1. An acrylic fiber having a titanium oxide content of 0.3 to 1.9 mass% and a triangular cross-sectional shape.
2. The acrylic fiber according to the above 1, wherein the content of titanium oxide is 0.5 mass% or more and 1.8 mass% or less.
3. The acrylic fiber according to the above 1. or 2, wherein the product of the knot strength and the knot elongation (K product) is 10 or more and 35 or less.
4. The acrylic fiber according to any one of the above 1 to 3, which comprises two monomer units of 90 mass% or more and 98 mass% or less of acrylonitrile unit and 2 mass% or more and 10 mass% or less of vinyl monomer unit other than acrylonitrile unit.
5. The acrylic fiber according to any one of the above 1 to 4, which has a single fiber fineness of 0.6dtex or more and 3.3dtex or less.
6. The acrylic fiber according to any one of the above 1 to 5, wherein the fiber length of the single fiber is 25mm or more and 100mm or less.
7. The acrylic fiber according to any one of the above 1 to 6, wherein the titanium oxide is anatase type, and the primary particle diameter is 0.1 μm or more and 1.0 μm or less.
8. A spun yarn having a content of the acrylic fiber of any one of the above 1 to 7 of 30 mass% or more, which is one of a single yarn, a double-ply yarn and a triple-ply yarn, and has a total count of 10 or more and 40 or less in terms of cotton count.
9. A knitted fabric comprising 40 mass% or more of the acrylic fiber described in any one of the above 1. to 7Vitamin, weight per unit area 50g/m2Above and 500g/m2Hereinafter, the UPF is 25 or more and the ultraviolet shielding rate is 90% or more.
10. A knitted fabric comprising 80 mass% or more of the spun yarn of 8.
11. The knitted fabric according to item 10 above, wherein the UPF is 25 or more.
12. The knitted fabric according to the above 10. or 11, wherein the ultraviolet shielding rate is 90% or more.
13. The knitted fabric according to any one of the above 10 to 12, having pilling resistance of 4 or more.
14. The knitted fabric according to any one of the above 10 to 13, wherein L is＊The value is 50 or more.
Effects of the invention
According to the present invention, acrylic fibers having a triangular cross-sectional shape which can provide excellent ultraviolet shielding performance and pilling resistance when formed into a knitted fabric can be obtained, and a knitted fabric comprising the fibers and having excellent ultraviolet shielding performance and pilling resistance can be obtained.
Detailed Description
The present invention will be described in detail below.
The content of titanium oxide in the acrylic fiber of the present invention is 0.3 to 1.9 mass%, and the cross-sectional shape is triangular.
The content of titanium oxide is preferably 0.3% by mass or more because high ultraviolet shielding performance can be obtained, and 1.9% by mass or less because secondary aggregation does not deteriorate spinning performance.
From the above viewpoint, the content of titanium oxide is more preferably 0.5% by mass or more and 1.8% by mass or less, and still more preferably 1.1% by mass or more and 1.7% by mass or less.
If the cross-sectional shape is triangular, the number of flat portions is large on the side surface of the fiber, and reflection is likely to occur when the fiber is irradiated with ultraviolet light, and therefore, high ultraviolet shielding performance can be obtained, which is preferable. From the above point of view, it is preferable that the triangle lacking the vertex has the same length for each side, and if the difference between the lengths of the sides is within 50%, the triangle may have different lengths. Further, each side is preferably linear, but a part of the side may be curved, may be convex outward, or may be concave inward.
The cross-sectional shape is a cross-section in a direction perpendicular to the fiber axis direction.
The acrylic fiber of the present invention preferably has a product (K product) of the knot strength and the knot elongation of the knot strength elongation, which will be described later, of 10 or more and 35 or less. If the K product is 10 or more, the breakage in the spinning step is small, the step passing property is easily improved, and if the K product is 35 or less, a high-quality knitted fabric having high pilling resistance can be easily produced. From the above viewpoint, the K product is more preferably 13 or more and 33 or less, and still more preferably 15 or more and 30 or less.
The acrylic fiber of the present invention is preferably composed of two monomer units of 90 to 98 mass% of acrylonitrile unit and 2 to 10 mass% of vinyl monomer unit other than acrylonitrile unit.
When the acrylonitrile unit content is 90% by mass or more, a good strength is easily obtained, and a spun yarn having good process passability in the spinning process can be easily obtained, and when the acrylonitrile unit content is 98% by mass or less, the stretchability in the spinning process is easily improved. From the above viewpoint, the acrylonitrile unit is more preferably 91% by mass or more and 97% by mass or less, and still more preferably 92% by mass or more and 96% by mass or less.
When the vinyl monomer unit other than the acrylonitrile unit is 2% by mass or more, the stretchability in the spinning step is easily improved, and therefore, it is preferable, and when the vinyl monomer unit is 10% by mass or less, the excellent strength is easily obtained, and therefore, the vinyl monomer unit is preferable.
From the above viewpoint, the vinyl monomer unit other than the acrylonitrile unit is more preferably 3% by mass or more and 9% by mass or less, and still more preferably 4% by mass or more and 8% by mass or less.
The vinyl monomer other than the acrylonitrile unit may be any monomer that is copolymerizable with acrylonitrile, and may be acrylic acid, methacrylic acid, or alkyl esters thereof, vinyl acetate, acrylamide, vinyl chloride, vinylidene chloride, or any other desired unsaturated monomer such as sodium vinylbenzenesulfonate, sodium methallylsulfonate, sodium allylsulfonate, sodium acrylamidomethylpropanesulfonate, or sodium p-sulfophenylmethylallylether.
Among them, acrylic acid, methacrylic acid, or alkyl esters thereof, vinyl acetate, acrylamide, vinyl chloride, and vinylidene chloride are preferable from the viewpoints of operability, polymerization stability, and cost.
The acrylic fiber of the present invention preferably has a single fiber fineness of 0.6dtex to 3.3 dtex.
If the single fiber fineness is 0.6dtex or more, the passing property in the spinning step is good, and high productivity is easily obtained, and if the single fiber fineness is 3.3dtex or less, a knitted fabric having a soft feeling and a good texture is easily obtained.
From these viewpoints, the single fiber fineness is more preferably 1.2dtex or more and 3.0dtex or less, and still more preferably 1.7dtex or more and 2.8dtex or less.
The acrylic fiber of the present invention is preferably a monofilament having a fiber length of 25mm to 100 mm.
If the fiber diameter is within this range, a spun yarn can be easily produced even if the single fiber fineness is small. From this viewpoint, the fiber length of the acrylic fiber of the present invention is more preferably 30mm or more and 70mm or less, and still more preferably 35mm or more and 55mm or less.
The acrylic fiber of the present invention preferably has a primary particle diameter of the titanium oxide of 0.1 to 1.0 μm. When the primary particle diameter is 0.1 μm or more, the stability in the dope is good because the secondary aggregation is small, and when the primary particle diameter is 1.0 μm or less, the nozzle clogging, yarn breakage, and the like are not easily caused because the particle diameter is sufficiently small.
The crystal structure of the titanium oxide is not particularly limited, but if it is anatase, it can easily have a good matte feeling (ダル feeling) due to the difference in color tone.
Therefore, it is particularly preferable that the titanium oxide is anatase type and has a primary particle diameter of 0.1 μm or more and 1.0 μm or less.
The acrylic fiber of the present invention is synthesized into an acrylonitrile copolymer by a conventionally known polymerization method such as suspension polymerization. The solvent for dissolving the acrylonitrile copolymer is not particularly limited, and for example, dimethylacetamide, dimethylformamide, dimethylsulfoxide, sodium thiocyanate (チオシアン acid ナトリウム), and sodium thiocyanate (ロダンソーダ) can be used. Among them, dimethylacetamide and dimethylformamide are preferable from the viewpoint of rapid solidification and easy formation of a fiber cross section having the same shape as the discharge hole.
The spinning method is not particularly limited, and for example, wet spinning, dry-wet spinning, and melt spinning can be used. Among them, wet spinning with rapid coagulation is preferable. Hereinafter, a method for producing acrylic fibers by wet spinning will be described, but the method is not limited thereto.
For example, a coagulated yarn is obtained by spinning an acrylonitrile copolymer obtained by suspension polymerization in a coagulating liquid in which a solvent and water are mixed.
In obtaining a coagulated yarn from an acrylonitrile copolymer, the solvent used in the coagulation liquid is preferably the same as the solvent that dissolves the acrylonitrile copolymer. The solvent concentration of the coagulation liquid is preferably 25 mass% or more and 45 mass% or less. If the solvent concentration is 25 mass% or more, the fiber is easily drawn, and if it is 45 mass% or less, the fiber can be rapidly solidified, and the cross section of the fiber having the same shape as the discharge hole is easily formed. From these viewpoints, the solvent concentration is more preferably 30% by mass or more and 40% by mass or less.
The temperature of the solidification solution is preferably 30 ℃ to 50 ℃. In this temperature range, the solidification can be rapidly performed, and the fiber cross section having the same shape as the discharge hole can be easily formed. From this viewpoint, the temperature of the solidification solution is more preferably 35 ℃ or higher and 45 ℃ or lower.
Subsequently, the obtained coagulated yarn was drawn.
The drawing of the coagulated yarn is performed in two stages of wet heat drawing and dry heat drawing, and for example, the first stage drawing (wet heat drawing) is performed in hot water (boiling water) at 90 ℃ or higher, then an oil agent is attached and dried by a hot roll, and then the second stage drawing (dry heat drawing) is further performed in a dry heat state. If the drawing of the coagulated yarn is carried out in two stages in this way, it is preferable because it is easy to control the value of the K product.
The wet heat stretching magnification is preferably 3 times or more and 5 times or less, and the dry heat stretching is preferably 1.1 times or more and 1.5 times or less.
And stretching the solidified yarn, and then performing relaxation treatment as required to obtain the acrylic fiber.
The relaxation treatment is preferably performed under pressurized steam, and the pressure thereof is preferably 0.10MPa to 0.18MPa, and more preferably 0.11MPa to 0.16MPa, from the viewpoint of improvement of pilling resistance.
The spun yarn of the present invention has a content of the acrylic fiber of 30 mass% or more.
When the acrylic fiber content is 30% by mass or more, high ultraviolet shielding performance and high pilling resistance can be obtained. From the above viewpoint, the content of the acrylic fiber is preferably 35% by mass or more, and more preferably 40% by mass or more.
The spun yarn of the present invention is any of a single yarn, a double yarn, and a triple yarn, and any of them may be used, and a double yarn is preferable from the viewpoint of strength and hand of the spun yarn.
The total count of the spun yarn of the present invention is 10 or more and 40 or less in terms of the cotton count. If the cotton count is 10 or more, the yarn is not too thick, and a thin fabric suitable for spring and summer can be easily produced, and if the cotton count is 40 or less, an ultraviolet shielding effect can be easily obtained.
From these viewpoints, the total number of spun yarns is more preferably 13 to 35, and still more preferably 15 to 30.
In addition, as described above, the number of the spun yarn of the present invention is in the range of 20/2 to 80/2 in terms of total number of counts, and therefore, in the case of a two-ply yarn.
The first aspect of the knitted fabric of the present invention contains 40 mass% or more of the acrylic fiber, aloneThe weight per unit area is 50g/m2Above and 500g/m2Hereinafter, the UPF is 25 or more and the ultraviolet shielding rate is 90% or more.
If the knitted fabric contains 40 mass% or more of the acrylic fiber, the ultraviolet shielding performance and the pilling resistance can be improved. From these viewpoints, the acrylic fiber is more preferably contained in an amount of 45 mass% or more, and still more preferably 50 mass% or more.
If the weight per unit area of the knitted fabric described above is 50g/m2As described above, the composition exhibits excellent ultraviolet shielding performance, and if it is 500g/m2Hereinafter, the fabric is suitable for summer clothing which is a main use. From the above viewpoint, the weight per unit area of the knitted fabric is more preferably 75g/m2Above and 450g/m2Hereinafter, more preferably 100g/m2Above and 400g/m2The following.
As the ultraviolet-shielding property, if the UPF is 25 or more, the ultraviolet-shielding property is sufficient, and more preferably 30 or more, and further preferably 35 or more. Similarly, the ultraviolet shielding rate may be 90% or more, more preferably 93% or more, and still more preferably 95% or more.
In a second aspect of the knitted fabric of the present invention, the content of the spun yarn is 80% by mass or more.
When the content of the spun yarn is 80% by mass or more, excellent ultraviolet shielding performance is exhibited. From this viewpoint, the content of the spun yarn is more preferably 85% by mass or more, and still more preferably 90% by mass or more.
The fabric of the second embodiment preferably has a UPF of 25 or more. If the UPF is 25 or more, the uv shielding performance is sufficient, and more preferably 30 or more, and still more preferably 35 or more. Similarly, the ultraviolet shielding rate is preferably 90% or more, more preferably 93% or more, and further preferably 95% or more.
The pilling resistance of the knitted fabric of the second embodiment is preferably 4 or more.
If the pilling resistance is at least level 4, the hair ball is not easily attached to clothes.
L of the knitted fabric of the second embodiment＊The value is preferably 50 or more. If L is＊When the value is 50 or more, the ultraviolet shielding effect can be obtained even with a light color. From this viewpoint, L＊The value is more preferably 70 or more, and still more preferably 85 or more.
Examples
The present invention will be described in detail with reference to examples. The measurement of each item in the examples was carried out by the following method.
(method of measuring Single fiber fineness)
Single fiber fineness (dtex) was measured at 25 ℃ and 65% humidity using an automatic vibration type fineness measuring instrument (Denior computer DC-11, manufactured by SEARCH control electric Co., Ltd.). The measurement was performed 25 times, and the average value was used.
(measurement of elongation at Strength, elongation at knot Strength, and K product)
The elongation strength (cN/dtex), elongation (%)), elongation at knot strength (cN/dtex) and elongation at knot strength (knot strength and (%)) in the standard state were determined in accordance with JIS-L1015-8.7 (tensile strength and elongation) and 8.8 (knot strength), and the product of the knot strength and elongation at knot was expressed as K product.
(UPF)
The knitted fabric was measured based on AS/NZS4399, which is an index UPF (ultraviolet protection index) set for objectively evaluating the ultraviolet protection effect of the clothing.
(ultraviolet ray shielding rate)
The ultraviolet light shielding rate is calculated by using a formula of 100- [ average transmittance (%) at a wavelength of 280 to 400nm ].
(pilling resistance)
The pilling resistance was measured according to JIS-L-1076A method.
(weight per unit area)
The weight per unit area was measured in accordance with JIS-L-1096-8.3.2 (mass per unit area in a standard state).
(example 1)
A copolymer comprising 93 mass% of acrylonitrile units and 7 mass% of vinyl acetate units was obtained by aqueous suspension polymerization. The reduced viscosity of the 0.5 mass% dimethylformamide solution of this copolymer at 25 ℃ was 2.0.
This copolymer was dissolved in dimethylacetamide to obtain an acrylonitrile copolymer solution having a copolymer concentration of 24 mass%. A dispersion obtained by containing and dispersing 20 mass% of titanium hexaoxide having an average particle diameter of 0.6 μm in dimethylacetamide was added to the acrylonitrile copolymer solution so that the titanium oxide content in the final acrylic fiber was 1.7 mass%, thereby preparing a dope.
The spinning dope was adjusted to 75 ℃ and extruded from an equilateral triangular discharge orifice of 80 μm to a coagulating liquid of 35 mass% dimethylacetamide and a temperature of 40 ℃ to perform wet spinning, then the solvent was washed in boiling water and stretched 3.5 times, then the finish was attached and dried with a hot roll, and then the dope was further stretched 1.3 times in a dry-hot state. Then, at 0.13MPa (1.3 kg/cm)2) The fiber was subjected to the relaxation treatment in the pressurized steam to obtain a fiber having a single fiber fineness of 2.2 dtex.
The physical properties of the fibers are shown in table 1.
Comparative example 1
A copolymer comprising 95% by mass of acrylonitrile units, 4.4% by mass of vinyl acetate units and 0.6% by mass of sodium methallylsulfonate units was obtained by aqueous suspension polymerization. The reduced viscosity of the 0.5 mass% dimethylformamide solution of this copolymer at 25 ℃ was 1.6.
This copolymer was dissolved in dimethylacetamide to obtain an acrylonitrile copolymer solution having a copolymer concentration of 24 mass%. The acrylonitrile copolymer solution was used as a spinning dope.
The dope was adjusted to 75 ℃ and extruded from a circular discharge hole having a diameter of 45 μm into a coagulating liquid containing 35 mass% of dimethylacetamide and having a temperature of 40 ℃ to perform wet spinning, then the dope was stretched 4.5 times while washing the solvent in boiling water, and then the dope was attached and dried with a hot roll, and then the dope was dried at 0.23MPa (2.3 kg/cm)2) Subjecting to a relaxation treatment in pressurized steam to obtain single-fiber fibersFibers with a degree of 2.2 dtex.
Comparative example 2
A copolymer comprising 93 mass% of acrylonitrile units and 7 mass% of vinyl acetate units was obtained by aqueous suspension polymerization. The polymer had a reduced viscosity of 2.0 at 25 ℃ in a 0.5 mass% dimethylformamide solution.
This copolymer was dissolved in dimethylacetamide to obtain an acrylonitrile copolymer solution having a copolymer concentration of 24 mass%. A dispersion obtained by containing and dispersing 20 mass% of anatase-type titanium oxide having an average particle diameter of 0.6 μm in dimethylacetamide was added to the acrylonitrile copolymer solution so that the content of titanium oxide in the final acrylic fiber was 1.7 mass%, thereby preparing a dope.
The dope was adjusted to 75 ℃ and extruded from a circular discharge hole having a diameter of 60 μm into a coagulating liquid containing 35 mass% of dimethylacetamide and having a temperature of 40 ℃ to perform wet spinning, then the dope was stretched 4.5 times while washing the solvent in boiling water, and then the dope was attached and dried by a hot roll, and then the dope was dried at 0.23MPa (2.3 kg/cm)2) The fiber was subjected to the relaxation treatment in the pressurized steam to obtain a fiber having a single fiber fineness of 1.7 dtex.
(examples 2 to 5)
The fiber obtained in example 1 was cut into 38mm, spun into 30/2 spun yarn in terms of cotton count by 2-inch spinning at a mixing ratio shown in Table 2, knitted into plain stitch by a 14-gauge circular knitting machine, and then dyed with gray white by a conventional method to obtain 250g/m in basis weight2The knitted fabric of (1).
Comparative examples 3 and 4
The fibers obtained in comparative examples 1 and 2 were cut into 38mm pieces, spun into 30/2 spun yarns using a 2-inch yarn according to the mixing ratio shown in Table 2, knitted into plain stitch by using a 14-gauge circular knitting machine, and dyed in yellow by a conventional method to give a basis weight of 250g/m2The knitted fabric of (1).
In comparative example 3, since titanium oxide was not contained in the fiber, UPF and ultraviolet shielding rate were low.
In comparative example 4, although containing titanium oxide, the UPF and the ultraviolet shielding rate were low. This is considered to be because the cross-sectional shape of the fiber is circular.
[ Table 1]
[ Table 2]
Claims (14)
1. An acrylic fiber having a titanium oxide content of 0.3 to 1.9 mass% and a triangular cross-sectional shape.
2. The acrylic fiber according to claim 1, wherein the content of titanium oxide is 0.5 mass% or more and 1.8 mass% or less.
3. The acrylic fiber according to claim 1 or 2, wherein a product of the knot strength and the knot elongation, that is, a K product is 10 or more and 35 or less.
4. The acrylic fiber according to any one of claims 1 to 3, which comprises two monomer units of 90 to 98 mass% of an acrylonitrile unit and 2 to 10 mass% of a vinyl monomer unit other than the acrylonitrile unit.
5. The acrylic fiber according to any one of claims 1 to 4, which has a single fiber fineness of 0.6dtex or more and 3.3dtex or less.
6. The acrylic fiber according to any one of claims 1 to 5, wherein the filament has a fiber length of 25mm or more and 100mm or less.
7. The acrylic fiber according to any one of claims 1 to 6, wherein the titanium oxide is anatase type and has a primary particle diameter of 0.1 μm or more and 1.0 μm or less.
8. A spun yarn having a content of the acrylic fiber recited in any one of claims 1 to 7 of 30 mass% or more, which is one of a single yarn, a double-ply yarn and a triple-ply yarn, and has a total count of 10 or more and 40 or less in terms of cotton count.
9. A knitted fabric comprising 40 mass% or more of the acrylic fiber according to any one of claims 1 to 7 and having a basis weight of 50g/m2Above and 500g/m2Hereinafter, the UPF is 25 or more and the ultraviolet shielding rate is 90% or more.
10. A knitted fabric comprising 80% by mass or more of the spun yarn of claim 8.
11. The knitted fabric according to claim 10, having a UPF of 25 or more.
12. The knitted fabric according to claim 10 or 11, wherein the ultraviolet shielding rate is 90% or more.
13. The knitted fabric according to any one of claims 10 to 12, having a pilling resistance of grade 4 or more.
14. The knitted fabric of any of claims 10-13, L＊The value is 50 or more.
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| JP2019152767 | 2019-08-23 | ||
| JP2019-152767 | 2019-08-23 | ||
| PCT/JP2020/031250 WO2021039528A1 (en) | 2019-08-23 | 2020-08-19 | Acrylic fiber, and spun yarn and knitted fabric comprising said fiber |
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| CN114302985A true CN114302985A (en) | 2022-04-08 |
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| JP (1) | JP7167991B2 (en) |
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| WO2022176705A1 (en) * | 2021-02-19 | 2022-08-25 | 株式会社カネカ | Uv-ray blocking acrylic fibers, uv-ray shielding fabric and fiber product containing same, and manufacturing method therefor |
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| CN107354531A (en) * | 2017-08-07 | 2017-11-17 | 太仓荣文合成纤维有限公司 | A kind of modified PBT fiber spinning process |
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- 2020-08-19 JP JP2020545367A patent/JP7167991B2/en active Active
- 2020-08-19 CN CN202080059500.6A patent/CN114302985A/en active Pending
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| JPWO2021039528A1 (en) | 2021-09-27 |
| WO2021039528A1 (en) | 2021-03-04 |
| JP7167991B2 (en) | 2022-11-09 |
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