WO2021039528A1 - Acrylic fiber, and spun yarn and knitted fabric comprising said fiber - Google Patents
Acrylic fiber, and spun yarn and knitted fabric comprising said fiber Download PDFInfo
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- WO2021039528A1 WO2021039528A1 PCT/JP2020/031250 JP2020031250W WO2021039528A1 WO 2021039528 A1 WO2021039528 A1 WO 2021039528A1 JP 2020031250 W JP2020031250 W JP 2020031250W WO 2021039528 A1 WO2021039528 A1 WO 2021039528A1
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- 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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- 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
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- 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
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- 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
Definitions
- the present invention relates to acrylic fibers, spun yarns containing the fibers, and knitted fabrics.
- Acrylic fibers have traditionally been widely used in clothing applications such as sweaters and interior applications such as carpets, taking advantage of their soft texture, heat retention, bulkiness, and excellent heat retention that are most similar to wool compared to other synthetic fibers. There is. However, acrylic fiber woven fabrics and knitted fabrics are liable to generate pills called pilling in which fluff, short hair, etc. are entangled on the surface thereof, which has a practical drawback that the appearance is significantly impaired and the commercial value is lowered. against this background, many proposals have been made to prevent the occurrence of pilling.
- Patent Document 1 For example, in Patent Document 1, from 94.0% by mass or more of acrylonitrile unit, 4.0 to 5.8% by mass of vinyl monomer unit other than acrylonitrile unit, and 0.2 to 2.0% by mass of sulfonic acid group-containing vinyl monomer unit. Therefore, acrylic fibers with improved anti-pill properties have been proposed by forming a triangular cross section.
- thin clothing products such as cardigans and cut-sews, which are used as outerwear for spring and summer, are required to have UV shielding and see-through properties to prevent sunburn.
- a method of kneading inorganic particles has been proposed as a means for imparting ultraviolet shielding property and see-through property to fibers.
- Patent Document 2 proposes an acrylic fiber having improved ultraviolet shielding properties by containing 2 to 7% by mass of titanium oxide having an average secondary particle size of 100 nm or more and 180 nm or less.
- Patent Document 3 proposes an acrylonitrile-based polymer fiber having a peculiar brilliance and luster, low dust absorption, and excellent stain resistance, and having a triangular cross section with sharp corners.
- Patent Document 1 improves the anti-pill property, there is no suggestion that it contains titanium oxide, and the ultraviolet shielding effect cannot be expected.
- Patent Document 2 has a problem that secondary aggregation is likely to occur because the particle size of titanium oxide is small, and problems such as deterioration of spinnability occur due to a large content of titanium oxide in the fiber.
- Patent Document 2 has a problem of generating a fly in the card process when processing into a spun yarn, so that it is in the direction of increasing the knot strength, and anti-pill property for lowering the knot strength cannot be expected. ..
- Patent Document 3 a small amount of titanium oxide is contained, but it is considered that the ultraviolet protection effect is insufficient at this amount.
- Patent Document 3 has an object of giving brilliance and luster, so that it is oxidized. This is a direction to reduce the titanium content, and the UV protection effect cannot be expected. Further, although Patent Document 3 describes the nodule strength and the nodule elongation, the product (K product) is large and there is a problem in anti-pill property, and a method for adjusting the nodule strength and the nodule elongation Since there is no description, it cannot be expected to improve anti-pill property.
- An object of the present invention is to provide an acrylic fiber having a triangular cross-sectional shape that can obtain excellent ultraviolet shielding performance and anti-pill property when knitted, and excellent in ultraviolet shielding performance and anti-pill property including the fiber. To provide knitted fabric.
- the gist of the present invention is as follows. 1.
- the content of titanium oxide is 0.5% by mass or more and 1.8% by mass or less.
- the product (K product) of knot strength and knot elongation is 10 or more and 35 or less.
- the acrylonitrile unit is composed of two types of monomer units, 90% by mass or more and 98% by mass or less, and 2% by mass or more and 10% by mass or less of a vinyl-based monomer unit other than the acrylonitrile unit. ⁇ 3.
- the single fiber fineness is 0.6 dtex or more and 3.3 dtex or less. ⁇ 4.
- the fiber length of a single fiber is 25 mm or more and 100 mm or less.
- the titanium oxide is anatase type and has a primary particle size of 0.1 ⁇ m or more and 1.0 ⁇ m or less.
- Acrylic fiber described in any of. 8. The above 1.
- an acrylic fiber having a triangular cross-sectional shape that can obtain excellent ultraviolet shielding performance and anti-pill property when knitted, and excellent ultraviolet shielding performance and anti-pill property including the fiber. You can get knitted fabric.
- the acrylic fiber of the present invention has a titanium oxide content of 0.3% by mass or more and 1.9% by mass or less, and has a triangular cross-sectional shape.
- the content of titanium oxide is 0.3% by mass or more, high ultraviolet shielding performance can be obtained, which is preferable, and when it is 1.9% by mass or less, spinnability is not deteriorated due to secondary aggregation or the like, which is preferable.
- the content of titanium oxide is more preferably 0.5% by mass or more and 1.8% by mass or less, and further preferably 1.1% by mass or more and 1.7% by mass or less.
- the cross-sectional shape is triangular, there are many flat portions on the side surface of the fiber, and reflection is likely to occur when the fiber is exposed to ultraviolet rays, so that high ultraviolet shielding performance can be obtained, which is preferable.
- the missing triangles lacking vertices and the lengths of each side are preferably the same length, but triangles having different lengths may be used as long as the difference in length between the sides is within 50%.
- each side is preferably straight, but a part of the side may be curved, may be bulged outward, or may be recessed inward.
- the cross-sectional shape is a cross section in the direction perpendicular to the fiber axis direction.
- the acrylic fiber of the present invention preferably has a product (K product) of knot strength and knot elongation in the knot strength elongation described later of 10 or more and 35 or less. If the K product is 10 or more, there is little breakage in the spinning process and the process passability is likely to be good, and if the K product is 35 or less, it is easy to obtain a knitted fabric having high anti-pill properties and high commercial value. .. From the above viewpoint, the K product is more preferably 13 or more and 33 or less, and further preferably 15 or more and 30 or less.
- the acrylic fiber of the present invention preferably comprises two types of monomer units: 90% by mass or more and 98% by mass or less of the acrylonitrile unit and 2% by mass or more and 10% by mass or less of the vinyl-based monomer unit other than the acrylonitrile unit.
- the acrylonitrile unit is 90% by mass or more, it tends to have good strength, and when it is 98% by mass or less, it is easy to obtain an excellent spun yarn with good process passability in the spinning process. Stretchability tends to be good.
- the acrylonitrile unit is more preferably 91% by mass or more and 97% by mass or less, and further preferably 92% by mass or more and 96% by mass or less.
- the vinyl-based monomer unit other than the acrylonitrile unit is 2% by mass or more, the stretchability in the spinning step tends to be good, and when it is 10% by mass or less, excellent strength can be easily obtained, which is preferable.
- the vinyl-based monomer unit other than the acrylonitrile unit is more preferably 3% by mass or more and 9% by mass or less, and further preferably 4% by mass or more and 8% by mass or less.
- the vinyl-based monomer other than the acrylonitrile unit may be a component copolymerizable with acrylonitrile, and may be acrylic acid, methacrylic acid, or alkyl esters thereof, vinyl acetate, acrylamide, vinyl chloride, vinylidene chloride, or vinyl depending on the purpose.
- Ionic unsaturated monomers such as sodium benzene sulfonate, sodium methallyl sulfonate, sodium allyl sulfonate, sodium acrylamide methylpropan sulfonate, and sodium parasulfophenyl metalyl ether can be used.
- acrylic acid, methacrylic acid, or alkyl esters thereof, vinyl acetate, acrylamide, vinyl chloride, and vinylidene chloride are preferable in terms of handleability, polymerization stability, and cost.
- the acrylic fiber of the present invention preferably has a single fiber fineness of 0.6 dtex or more and 3.3 dtex or less.
- the single fiber fineness is 0.6 dtex or more, the passability in the spinning process is good and high productivity is easily obtained, and when it is 3.3 dtex or less, a knitted fabric having a good texture with a soft touch is easily obtained.
- the single fiber fineness is more preferably 1.2 dtex or more and 3.0 dtex or less, and further preferably 1.7 dtex or more and 2.8 dtex or less.
- the acrylic fiber of the present invention preferably has a single fiber having a fiber length of 25 mm or more and 100 mm or less. Within this range, spun yarn can be easily manufactured even if the single fiber fineness is fine. From this viewpoint, the fiber length of the acrylic fiber of the present invention is more preferably 30 mm or more and 70 mm or less, and further preferably 35 mm or more and 55 mm or less.
- the acrylic fiber of the present invention preferably has a titanium oxide primary particle size of 0.1 ⁇ m or more and 1.0 ⁇ m or less. If the primary particle size is 0.1 ⁇ m or more, the secondary agglutination is small and the stability in the spinning stock solution is good. If the primary particle size is 1.0 ⁇ m or less, the particle size is sufficiently small and nozzle clogging and yarn breakage are unlikely to occur. ..
- the crystal structure of the titanium oxide is not particularly limited, but the anatase type makes it easier to give a good dull feeling due to the difference in color. Therefore, it is particularly preferable that the titanium oxide is anatase type and has a primary particle size of 0.1 ⁇ m or more and 1.0 ⁇ m or less.
- the acrylic fiber of the present invention synthesizes an acrylonitrile copolymer by a conventionally known polymerization method, for example, suspension polymerization.
- the solvent for dissolving the acrylonitrile copolymer is not particularly limited, and for example, dimethylacetamide, dimethylformamide, dimethyl sulfoxide, sodium thiocyanate, and rodan soda can be used. Of these, dimethylacetamide and dimethylformamide are preferable from the viewpoint of quick 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 spinning, dry wet spinning, and melt spinning can be used. Of these, wet spinning that solidifies quickly is preferable.
- a method for producing acrylic fiber by wet spinning will be described, but the present invention is not limited to this.
- the acrylonitrile copolymer obtained by suspension polymerization is spun in a coagulation liquid in which a solvent and water are mixed to obtain a coagulated yarn.
- the solvent used in the coagulating liquid is preferably the same as the solvent that dissolves the acrylonitrile copolymer.
- the solvent concentration of the coagulation liquid is preferably 25% by mass or more and 45% by mass or less. When the solvent concentration is 25% by mass or more, the fiber can be easily stretched, and when it is 45% by mass or less, solidification can be performed quickly and the fiber cross section having the same shape as the discharge hole can be easily obtained. From these viewpoints, the solvent concentration is more preferably 30% by mass or more and 40% by mass or less.
- the temperature of the coagulating liquid is preferably 30 ° C. or higher and 50 ° C. or lower.
- the temperature of the coagulating liquid is more preferably 35 ° C. or higher and 45 ° C. or lower.
- the coagulated yarn is stretched in two stages, moist heat stretching and dry heat stretching, for example, the first stage stretching (wet heat stretching) in hot water (boiling water) at 90 ° C. or higher, followed by adhering an oil agent and drying with a hot roller. After that, the second stage stretching (dry heat stretching) is further performed in a dry heat state. It is preferable to stretch the coagulated yarn in two steps in this way because it is easy to control the value of the K product.
- the wet heat stretching ratio is preferably 3 times or more and 5 times or less, and the dry heat stretching ratio is preferably 1.1 times or more and 1.5 times or less.
- relaxation treatment is performed as necessary to obtain acrylic fibers.
- the relaxation treatment is preferably carried out with pressurized steam, and the pressure is preferably 0.10 MPa or more and 0.18 MPa or less, more preferably 0.11 MPa or more and 0.16 MPa or less, from the viewpoint of improving anti-pill property. ..
- the spun yarn of the present invention has an acrylic fiber content of 30% by mass or more.
- the content of the acrylic fiber is 30% by mass or more, high ultraviolet shielding performance and high anti-pill property can be obtained.
- 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 may be a single yarn, a twin yarn, or a triple yarn, and any of them may be used, but the twin yarn is preferable from the viewpoint of the strength and texture of the spun yarn.
- the spun yarn of the present invention has a total count of 10 or more and 40 or less in cotton count. If the cotton count is 10 or more, the thread does not become too thick and it is easy to make a thin fabric for spring and summer, and if it is 40 or less, the ultraviolet shielding effect can be easily obtained. From these viewpoints, the total count of the spun yarn is more preferably 13 or more and 35 or less, and further preferably 15 or more and 30 or less. Further, as described above, since the count of the spun yarn of the present invention is the total count, the count of the twin yarn is in the range of 20/2 to 80/2.
- the first form of the knitted fabric of the present invention contains the acrylic fiber in an amount of 40% by mass or more, has a basis weight of 50 g / m 2 or more and 500 g / m 2 or less, has an UPF of 25 or more, and has an ultraviolet shielding rate of 90% or more.
- a knitted fabric containing 40% by mass or more of the acrylic fiber can have high ultraviolet shielding performance and anti-pill property. From these viewpoints, it is more preferable to contain the acrylic fiber in an amount of 45% by mass or more, and even more preferably 50% by mass or more.
- the basis weight of the above-mentioned knitted fabric is 50 g / m 2 or more, it shows good ultraviolet shielding performance, and if it is 500 g / m 2 or less, it is suitable for summer clothing, which is the main application.
- the basis weight of the knitted fabric is more preferably 75 g / m 2 or more and 450 g / m 2 or less, and further preferably 100 g / m 2 or more and 400 g / m 2 or less.
- the ultraviolet shielding property when the UPF is 25 or more, it has sufficient ultraviolet shielding performance, more preferably 30 or more, and further preferably 35 or more.
- the ultraviolet shielding rate may be 90% or more, more preferably 93% or more, and even more preferably 95% or more.
- the content of the spun yarn is 80% by mass or more.
- the content of the spun yarn is 80% by mass or more, good ultraviolet shielding performance is exhibited.
- the content of the spun yarn is more preferably 85% by mass or more, and further preferably 90% by mass or more.
- the knitted fabric of the second form preferably has an UPF of 25 or more.
- the UPF is 25 or more, it has sufficient ultraviolet shielding performance, 30 or more is more preferable, and 35 or more is further preferable.
- the ultraviolet shielding rate is preferably 90% or more, more preferably 93% or more, and even more preferably 95% or more.
- the second form of knitted fabric preferably has an anti-pill property of grade 4 or higher. If the anti-pill property is grade 4 or higher, pills are less likely to adhere to clothes.
- the knitted fabric of the second form preferably has an L * value of 50 or more. If the L * value is 50 or more, the effect of obtaining an ultraviolet shielding effect can be obtained even in a light color. From this viewpoint, the L * value is more preferably 70 or more, and further preferably 85 or more.
- UV shielding rate 100- [average transmittance (%) at a wavelength of 280 to 400 nm].
- Anti-pill property was measured according to JIS-L-1076 A method.
- Example 1 A copolymer composed of 93% by mass of acrylonitrile units and 7% by 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 ° C. was 2.0. This copolymer was dissolved in dimethylacetamide to prepare an acrylonitrile copolymer solution having a copolymer concentration of 24% by mass. A dispersion containing 20% by mass of titanium hexaoxide having an average particle size of 0.6 ⁇ m in dimethylacetamide in this acrylonitrile copolymer solution was dispersed, and the titanium oxide content in the final acrylic fiber was 1.7% by mass.
- the undiluted spinning solution is adjusted to 75 ° C., extruded into a coagulating solution having dimethylacetamide at 35% by mass and a temperature of 40 ° C. from an equilateral triangle-shaped discharge hole having a side of 80 ⁇ m for wet spinning, and then the solvent is washed in boiling water. While stretching 3.5 times, the oil agent was subsequently attached, dried with a hot roller, and further stretched 1.3 times in a dry state. Then, relaxation treatment was carried out in pressurized steam of 0.13 MPa (1.3 kg / cm 2 ) to obtain a fiber having a single fiber fineness of 2.2 dtex. The physical characteristics of the fiber are shown in Table 1.
- the undiluted spinning solution was adjusted to 75 ° C., extruded into a coagulating solution having dimethylacetamide at 35% by mass and a temperature of 40 ° C. from a round-shaped discharge hole having a diameter of 45 ⁇ m for wet spinning, and then the solvent was washed in boiling water. While stretching 4.5 times, the oil agent was attached, dried with a hot roller, and then relaxed in 0.23 MPa (2.3 kg / cm 2 ) pressure steam to reduce the single fiber fineness. 2.2 dtex fibers were obtained.
- the spinning stock solution is adjusted to 75 ° C., and is extruded from a round-shaped discharge hole having a diameter of 60 ⁇ m into a coagulating solution having dimethylacetamide of 35% by mass and a temperature of 40 ° C. for wet spinning, and then the solvent is washed in boiling water. While stretching 4.5 times, the oil agent was attached, dried with a hot roller, and then relaxed in 0.23 MPa (2.3 kg / cm 2 ) pressure steam to reduce the single fiber fineness. A fiber of 1.7 dtex was obtained.
- Example 2 The fiber obtained in Example 1 was cut into 38 mm, spun yarn with a cotton count of 30/2 by 2-inch spinning at the mixing ratio shown in Table 2, and manufactured into a plain structure using a 14-gauge circular knitting machine. After knitting, it was dyed off-white by a conventional method to prepare a knitted fabric having a basis weight of 250 g / m 2.
- Comparative Examples 3 and 4 The fibers obtained in Comparative Examples 1 and 2 were cut into 38 mm, spun yarn of 30/2 by 2-inch spinning at the mixing ratio shown in Table 2, and knitted into a plain structure using a 14-gauge circular knitting machine. Then, it was dyed yellow by a conventional method to prepare a knitted fabric having a basis weight of 250 g / m 2. In Comparative Example 3, since the fibers did not contain titanium oxide, the UPF and the ultraviolet shielding rate were low. Further, in Comparative Example 4, despite the fact that titanium oxide was contained, the UPF and the ultraviolet shielding rate were low. It is considered that this is due to the fact that the cross-sectional shape of the fiber is round.
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Abstract
The present invention provides: an acrylic fiber that has excellent UV ray-blocking properties and pill resistance and has a triangular cross-sectional shape; and a knitted fabric with excellent UV ray-blocking properties and pill resistance that comprises said fiber. Specifically, the invention provides an acrylic fiber, in which the titanium oxide content is 0.3-1.9 mass% and the shape of the cross-section is triangular, preferably an acrylic fiber, which comprises 90-98 mass% of acrylonitrile units and 2-10 mass% of vinyl monomer units and in which the product of the knot strength and knot elongation (K product) is 10-35 and the primary particle size of the titanium oxide is 0.1-1.0 μm.
Description
本発明は、アクリル繊維、該繊維を含む紡績糸及び編地に関するものである。
The present invention relates to acrylic fibers, spun yarns containing the fibers, and knitted fabrics.
アクリル繊維は従来、他の合成繊維に比べて最も羊毛に類似した柔軟な風合い、保温性、嵩高性、優れた保温性を活かし、セーター等の衣料用途、カーペット等のインテリア用途に広く利用されている。しかしながら、アクリル繊維の織物・編物はその表面に毛羽、短毛等の絡まりあったピリングと呼ばれる毛玉が発生しやすく、外観を著しく損ない商品性を低下させるという実用上の欠点がある。かかる状況を背景としてピリングの発生を防止するために多くの提案がなされている。
Acrylic fibers have traditionally been widely used in clothing applications such as sweaters and interior applications such as carpets, taking advantage of their soft texture, heat retention, bulkiness, and excellent heat retention that are most similar to wool compared to other synthetic fibers. There is. However, acrylic fiber woven fabrics and knitted fabrics are liable to generate pills called pilling in which fluff, short hair, etc. are entangled on the surface thereof, which has a practical drawback that the appearance is significantly impaired and the commercial value is lowered. Against this background, many proposals have been made to prevent the occurrence of pilling.
例えば特許文献１ではアクリロニトリル単位９４．０質量％以上、アクリロニトリル単位以外のビニル系モノマー単位４．０～５．８質量％、およびスルホン酸基含有ビニルモノマー単位０．２～２．０質量％からなり、三角断面形状とすることで、抗ピル性を向上させたアクリル繊維が提案されている。
For example, in Patent Document 1, from 94.0% by mass or more of acrylonitrile unit, 4.0 to 5.8% by mass of vinyl monomer unit other than acrylonitrile unit, and 0.2 to 2.0% by mass of sulfonic acid group-containing vinyl monomer unit. Therefore, acrylic fibers with improved anti-pill properties have been proposed by forming a triangular cross section.
一方、カーディガン、カットソーなど特に春夏用の外衣として用いられる薄手の衣料製品においては、日焼け予防としての紫外線遮蔽性や防透け性が求められる。繊維に紫外線遮蔽性や防透け性を付与する手段として、無機粒子を練り込む方法が提案されている。
On the other hand, thin clothing products such as cardigans and cut-sews, which are used as outerwear for spring and summer, are required to have UV shielding and see-through properties to prevent sunburn. A method of kneading inorganic particles has been proposed as a means for imparting ultraviolet shielding property and see-through property to fibers.
例えば特許文献２では、平均二次粒子径が１００ｎｍ以上１８０ｎｍ以下である酸化チタンを２～７質量％含むことで紫外線遮蔽性を向上させたアクリル繊維が提案されている。
For example, Patent Document 2 proposes an acrylic fiber having improved ultraviolet shielding properties by containing 2 to 7% by mass of titanium oxide having an average secondary particle size of 100 nm or more and 180 nm or less.
例えば特許文献３では、特異な輝きと光沢を有し、吸塵性が少なく、耐汚染性に優れる、各角部が尖鋭な三角形状横断面を有するアクリロニトリル系重合体繊維が提案されている。
For example, Patent Document 3 proposes an acrylonitrile-based polymer fiber having a peculiar brilliance and luster, low dust absorption, and excellent stain resistance, and having a triangular cross section with sharp corners.
しかしながら、特許文献１に記載の方法では抗ピル性は改善されるものの、酸化チタンを含有する示唆はなく、紫外線遮蔽効果が期待できるものではない。
特許文献２では、酸化チタンの粒子径が小さいので二次凝集が起こりやすく、繊維中の酸化チタンの含有量が多いため紡糸性が悪化するなどの問題が起こるという課題がある。加えて、特許文献２は、紡績糸に加工する際、カード工程のフライの発生を課題としているので、結節強度を高くする方向であり、結節強度を低くする抗ピル性は期待できるものではない。
特許文献３では、酸化チタンを少量含有させているが、この量では、紫外線防止効果が不足していると考えられるが、特許文献３は、輝きと光沢を与えることを課題としているため、酸化チタンの含有量を減少させる方向であり、紫外線防止効果が期待できるものではない。また、特許文献３には、結節強度と結節伸度の記載はあるが、その積（Ｋ積）は大きいものであり、抗ピル性にも課題があり、結節強度と結節伸度の調整方法も記載がないので、抗ピル性向上も期待できるものではない。 However, although the method described in Patent Document 1 improves the anti-pill property, there is no suggestion that it contains titanium oxide, and the ultraviolet shielding effect cannot be expected.
Patent Document 2 has a problem that secondary aggregation is likely to occur because the particle size of titanium oxide is small, and problems such as deterioration of spinnability occur due to a large content of titanium oxide in the fiber. In addition, Patent Document 2 has a problem of generating a fly in the card process when processing into a spun yarn, so that it is in the direction of increasing the knot strength, and anti-pill property for lowering the knot strength cannot be expected. ..
In Patent Document 3, a small amount of titanium oxide is contained, but it is considered that the ultraviolet protection effect is insufficient at this amount. However, Patent Document 3 has an object of giving brilliance and luster, so that it is oxidized. This is a direction to reduce the titanium content, and the UV protection effect cannot be expected. Further, although Patent Document 3 describes the nodule strength and the nodule elongation, the product (K product) is large and there is a problem in anti-pill property, and a method for adjusting the nodule strength and the nodule elongation Since there is no description, it cannot be expected to improve anti-pill property.
特許文献２では、酸化チタンの粒子径が小さいので二次凝集が起こりやすく、繊維中の酸化チタンの含有量が多いため紡糸性が悪化するなどの問題が起こるという課題がある。加えて、特許文献２は、紡績糸に加工する際、カード工程のフライの発生を課題としているので、結節強度を高くする方向であり、結節強度を低くする抗ピル性は期待できるものではない。
特許文献３では、酸化チタンを少量含有させているが、この量では、紫外線防止効果が不足していると考えられるが、特許文献３は、輝きと光沢を与えることを課題としているため、酸化チタンの含有量を減少させる方向であり、紫外線防止効果が期待できるものではない。また、特許文献３には、結節強度と結節伸度の記載はあるが、その積（Ｋ積）は大きいものであり、抗ピル性にも課題があり、結節強度と結節伸度の調整方法も記載がないので、抗ピル性向上も期待できるものではない。 However, although the method described in Patent Document 1 improves the anti-pill property, there is no suggestion that it contains titanium oxide, and the ultraviolet shielding effect cannot be expected.
Patent Document 2 has a problem that secondary aggregation is likely to occur because the particle size of titanium oxide is small, and problems such as deterioration of spinnability occur due to a large content of titanium oxide in the fiber. In addition, Patent Document 2 has a problem of generating a fly in the card process when processing into a spun yarn, so that it is in the direction of increasing the knot strength, and anti-pill property for lowering the knot strength cannot be expected. ..
In Patent Document 3, a small amount of titanium oxide is contained, but it is considered that the ultraviolet protection effect is insufficient at this amount. However, Patent Document 3 has an object of giving brilliance and luster, so that it is oxidized. This is a direction to reduce the titanium content, and the UV protection effect cannot be expected. Further, although Patent Document 3 describes the nodule strength and the nodule elongation, the product (K product) is large and there is a problem in anti-pill property, and a method for adjusting the nodule strength and the nodule elongation Since there is no description, it cannot be expected to improve anti-pill property.
本発明の目的は編地にした時に優れた紫外線遮蔽性能及び抗ピル性が得られる三角断面形状を有するアクリル繊維を提供することにあり、その繊維を含む紫外線遮蔽性能と抗ピル性に優れた編地を提供することにある。
An object of the present invention is to provide an acrylic fiber having a triangular cross-sectional shape that can obtain excellent ultraviolet shielding performance and anti-pill property when knitted, and excellent in ultraviolet shielding performance and anti-pill property including the fiber. To provide knitted fabric.
本発明の要旨は以下の通りである。
１．酸化チタンの含有量が０．３質量％以上１．９質量％以下であり、断面形状が三角形であるアクリル繊維。
２．酸化チタンの含有量が０．５質量％以上１．８質量％以下である前記１．に記載のアクリル繊維。
３．結節強度と結節伸度の積（Ｋ積）が１０以上３５以下である前記１．または２．に記載のアクリル繊維。
４．アクリロニトリル単位９０質量％以上９８質量％以下とアクリロニトリル単位以外のビニル系モノマー単位２質量％以上１０質量％以下との２種のモノマー単位からなる前記１．～３．のいずれかに記載のアクリル繊維。
５．単繊維繊度が０．６ｄｔｅｘ以上３．３ｄｔｅｘ以下である前記１．～４．のいずれかに記載のアクリル繊維。
６．単繊維の繊維長が２５ｍｍ以上１００ｍｍ以下である前記１．～５．のいずれかに記載のアクリル繊維。
７．前記酸化チタンがアナターゼ型であり、一次粒子径が０．１μｍ以上１．０μｍ以下である前記１．～６．のいずれかに記載のアクリル繊維。
８．前記１．～７．のいずれかに記載のアクリル繊維の含有率が３０質量％以上である紡績糸であって、単糸、双糸または三子糸のいずれかであり、トータル番手が綿番手で１０番以上４０番以下である紡績糸。
９．前記１．～７．のいずれかに記載のアクリル繊維を４０質量％以上含有し、目付が５０ｇ／ｍ２以上５００ｇ／ｍ２以下であり、ＵＰＦが２５以上、紫外線遮蔽率が９０％以上である編地。
１０．前記８．に記載の紡績糸を８０質量％以上含有する編地。
１１．ＵＰＦが２５以上である前記１０．に記載の編地。
１２．紫外線遮蔽率が９０％以上である前記１０．または１１．に記載の編地。
１３．抗ピル性能が４級以上である前記１０．～１２．のいずれかに記載の編地。
１４．Ｌ＊値が５０以上である前記１０．～１３．のいずれかに記載の編地。 The gist of the present invention is as follows.
1. 1. Acrylic fiber having a titanium oxide content of 0.3% by mass or more and 1.9% by mass or less and a triangular cross-sectional shape.
2. 2. The content of titanium oxide is 0.5% by mass or more and 1.8% by mass or less. Acrylic fiber described in.
3. 3. The product (K product) of knot strength and knot elongation is 10 or more and 35 or less. Or 2. Acrylic fiber described in.
4. The acrylonitrile unit is composed of two types of monomer units, 90% by mass or more and 98% by mass or less, and 2% by mass or more and 10% by mass or less of a vinyl-based monomer unit other than the acrylonitrile unit. ~ 3. Acrylic fiber described in any of.
5. The single fiber fineness is 0.6 dtex or more and 3.3 dtex or less. ~ 4. Acrylic fiber described in any of.
6. The fiber length of a single fiber is 25 mm or more and 100 mm or less. ~ 5. Acrylic fiber described in any of.
7. The titanium oxide is anatase type and has a primary particle size of 0.1 μm or more and 1.0 μm or less. ~ 6. Acrylic fiber described in any of.
8. The above 1. ~ 7. The spun yarn having an acrylic fiber content of 30% by mass or more according to any one of the above, which is either a single yarn, a twin yarn or a triple yarn, and has a total count of 10 to 40 with a cotton count. The following spun yarn.
9. The above 1. ~ 7. A knitted fabric containing 40% by mass or more of the acrylic fiber according to any one of the above, having a basis weight of 50 g / m 2 or more and 500 g / m 2 or less, an UPF of 25 or more, and an ultraviolet shielding rate of 90% or more.
10. 8. A knitted fabric containing 80% by mass or more of the spun yarn described in 1.
11. 10. The UPF is 25 or more. The knitted fabric described in.
12. 10. The ultraviolet shielding rate is 90% or more. Or 11. The knitted fabric described in.
13. The anti-pill performance is grade 4 or higher. ~ 12. The knitted fabric described in any of.
14. The L * value is 50 or more. ~ 13. The knitted fabric described in any of.
１．酸化チタンの含有量が０．３質量％以上１．９質量％以下であり、断面形状が三角形であるアクリル繊維。
２．酸化チタンの含有量が０．５質量％以上１．８質量％以下である前記１．に記載のアクリル繊維。
３．結節強度と結節伸度の積（Ｋ積）が１０以上３５以下である前記１．または２．に記載のアクリル繊維。
４．アクリロニトリル単位９０質量％以上９８質量％以下とアクリロニトリル単位以外のビニル系モノマー単位２質量％以上１０質量％以下との２種のモノマー単位からなる前記１．～３．のいずれかに記載のアクリル繊維。
５．単繊維繊度が０．６ｄｔｅｘ以上３．３ｄｔｅｘ以下である前記１．～４．のいずれかに記載のアクリル繊維。
６．単繊維の繊維長が２５ｍｍ以上１００ｍｍ以下である前記１．～５．のいずれかに記載のアクリル繊維。
７．前記酸化チタンがアナターゼ型であり、一次粒子径が０．１μｍ以上１．０μｍ以下である前記１．～６．のいずれかに記載のアクリル繊維。
８．前記１．～７．のいずれかに記載のアクリル繊維の含有率が３０質量％以上である紡績糸であって、単糸、双糸または三子糸のいずれかであり、トータル番手が綿番手で１０番以上４０番以下である紡績糸。
９．前記１．～７．のいずれかに記載のアクリル繊維を４０質量％以上含有し、目付が５０ｇ／ｍ２以上５００ｇ／ｍ２以下であり、ＵＰＦが２５以上、紫外線遮蔽率が９０％以上である編地。
１０．前記８．に記載の紡績糸を８０質量％以上含有する編地。
１１．ＵＰＦが２５以上である前記１０．に記載の編地。
１２．紫外線遮蔽率が９０％以上である前記１０．または１１．に記載の編地。
１３．抗ピル性能が４級以上である前記１０．～１２．のいずれかに記載の編地。
１４．Ｌ＊値が５０以上である前記１０．～１３．のいずれかに記載の編地。 The gist of the present invention is as follows.
1. 1. Acrylic fiber having a titanium oxide content of 0.3% by mass or more and 1.9% by mass or less and a triangular cross-sectional shape.
2. 2. The content of titanium oxide is 0.5% by mass or more and 1.8% by mass or less. Acrylic fiber described in.
3. 3. The product (K product) of knot strength and knot elongation is 10 or more and 35 or less. Or 2. Acrylic fiber described in.
4. The acrylonitrile unit is composed of two types of monomer units, 90% by mass or more and 98% by mass or less, and 2% by mass or more and 10% by mass or less of a vinyl-based monomer unit other than the acrylonitrile unit. ~ 3. Acrylic fiber described in any of.
5. The single fiber fineness is 0.6 dtex or more and 3.3 dtex or less. ~ 4. Acrylic fiber described in any of.
6. The fiber length of a single fiber is 25 mm or more and 100 mm or less. ~ 5. Acrylic fiber described in any of.
7. The titanium oxide is anatase type and has a primary particle size of 0.1 μm or more and 1.0 μm or less. ~ 6. Acrylic fiber described in any of.
8. The above 1. ~ 7. The spun yarn having an acrylic fiber content of 30% by mass or more according to any one of the above, which is either a single yarn, a twin yarn or a triple yarn, and has a total count of 10 to 40 with a cotton count. The following spun yarn.
9. The above 1. ~ 7. A knitted fabric containing 40% by mass or more of the acrylic fiber according to any one of the above, having a basis weight of 50 g / m 2 or more and 500 g / m 2 or less, an UPF of 25 or more, and an ultraviolet shielding rate of 90% or more.
10. 8. A knitted fabric containing 80% by mass or more of the spun yarn described in 1.
11. 10. The UPF is 25 or more. The knitted fabric described in.
12. 10. The ultraviolet shielding rate is 90% or more. Or 11. The knitted fabric described in.
13. The anti-pill performance is grade 4 or higher. ~ 12. The knitted fabric described in any of.
14. The L * value is 50 or more. ~ 13. The knitted fabric described in any of.
本発明によれば、編地にした時に優れた紫外線遮蔽性能及び抗ピル性が得られる三角断面形状を有するアクリル繊維を得ることができ、その繊維を含む紫外線遮蔽性能と抗ピル性に優れた編地を得ることができる。
According to the present invention, it is possible to obtain an acrylic fiber having a triangular cross-sectional shape that can obtain excellent ultraviolet shielding performance and anti-pill property when knitted, and excellent ultraviolet shielding performance and anti-pill property including the fiber. You can get knitted fabric.
以下、本発明を詳しく説明する。
本発明のアクリル繊維は、酸化チタンの含有量が０．３質量％以上１．９質量％以下であり、断面形状が三角形である。
酸化チタンの含有量が０．３質量％以上であれば、高い紫外線遮蔽性能を得られるので好ましく、１．９質量％以下であれば二次凝集などで紡糸性が悪化しないので好ましい。
上記観点から、酸化チタンの含有量は０．５質量％以上１．８質量％以下がより好ましく、１．１質量％以上１．７質量％以下がさらに好ましい。
断面形状が三角形であれば、繊維側面に平面の部分が多く、繊維に紫外線が当たった際に反射が起こりやすいため、高い紫外線遮蔽性能を得られるので好ましい。上記観点から頂点が欠けた欠三角形、各辺の長さは、同じ長さが好ましいが、辺同士の長さの差が５０％以内であれば、長さが異なる三角形であってもよい。また、各辺は直線状が好ましいが、辺の一部が曲線で合ってもよく、外に膨れてもよく、内側に凹んでいてもよい。
断面形状は、繊維軸方向に対する垂直方向の断面である。 Hereinafter, the present invention will be described in detail.
The acrylic fiber of the present invention has a titanium oxide content of 0.3% by mass or more and 1.9% by mass or less, and has a triangular cross-sectional shape.
When the content of titanium oxide is 0.3% by mass or more, high ultraviolet shielding performance can be obtained, which is preferable, and when it is 1.9% by mass or less, spinnability is not deteriorated due to secondary aggregation or the like, which is preferable.
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 further preferably 1.1% by mass or more and 1.7% by mass or less.
When the cross-sectional shape is triangular, there are many flat portions on the side surface of the fiber, and reflection is likely to occur when the fiber is exposed to ultraviolet rays, so that high ultraviolet shielding performance can be obtained, which is preferable. From the above viewpoint, the missing triangles lacking vertices and the lengths of each side are preferably the same length, but triangles having different lengths may be used as long as the difference in length between the sides is within 50%. Further, each side is preferably straight, but a part of the side may be curved, may be bulged outward, or may be recessed inward.
The cross-sectional shape is a cross section in the direction perpendicular to the fiber axis direction.
本発明のアクリル繊維は、酸化チタンの含有量が０．３質量％以上１．９質量％以下であり、断面形状が三角形である。
酸化チタンの含有量が０．３質量％以上であれば、高い紫外線遮蔽性能を得られるので好ましく、１．９質量％以下であれば二次凝集などで紡糸性が悪化しないので好ましい。
上記観点から、酸化チタンの含有量は０．５質量％以上１．８質量％以下がより好ましく、１．１質量％以上１．７質量％以下がさらに好ましい。
断面形状が三角形であれば、繊維側面に平面の部分が多く、繊維に紫外線が当たった際に反射が起こりやすいため、高い紫外線遮蔽性能を得られるので好ましい。上記観点から頂点が欠けた欠三角形、各辺の長さは、同じ長さが好ましいが、辺同士の長さの差が５０％以内であれば、長さが異なる三角形であってもよい。また、各辺は直線状が好ましいが、辺の一部が曲線で合ってもよく、外に膨れてもよく、内側に凹んでいてもよい。
断面形状は、繊維軸方向に対する垂直方向の断面である。 Hereinafter, the present invention will be described in detail.
The acrylic fiber of the present invention has a titanium oxide content of 0.3% by mass or more and 1.9% by mass or less, and has a triangular cross-sectional shape.
When the content of titanium oxide is 0.3% by mass or more, high ultraviolet shielding performance can be obtained, which is preferable, and when it is 1.9% by mass or less, spinnability is not deteriorated due to secondary aggregation or the like, which is preferable.
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 further preferably 1.1% by mass or more and 1.7% by mass or less.
When the cross-sectional shape is triangular, there are many flat portions on the side surface of the fiber, and reflection is likely to occur when the fiber is exposed to ultraviolet rays, so that high ultraviolet shielding performance can be obtained, which is preferable. From the above viewpoint, the missing triangles lacking vertices and the lengths of each side are preferably the same length, but triangles having different lengths may be used as long as the difference in length between the sides is within 50%. Further, each side is preferably straight, but a part of the side may be curved, may be bulged outward, or may be recessed inward.
The cross-sectional shape is a cross section in the direction perpendicular to the fiber axis direction.
本発明のアクリル繊維は、後述する結節強伸度における結節強度と結節伸度の積（Ｋ積）が１０以上３５以下であることが好ましい。Ｋ積が１０以上であれば紡績工程での折損が少なく工程通過性が良好となりやすく、Ｋ積が３５以下であれば高い抗ピル性を持ち商品性の高い編地とすることができやすくなる。上記観点からＫ積は１３以上３３以下がより好ましく、１５以上３０以下が更に好ましい。
The acrylic fiber of the present invention preferably has a product (K product) of knot strength and knot elongation in the knot strength elongation described later of 10 or more and 35 or less. If the K product is 10 or more, there is little breakage in the spinning process and the process passability is likely to be good, and if the K product is 35 or less, it is easy to obtain a knitted fabric having high anti-pill properties and high commercial value. .. From the above viewpoint, the K product is more preferably 13 or more and 33 or less, and further preferably 15 or more and 30 or less.
本発明のアクリル繊維は、アクリロニトリル単位９０質量％以上９８質量％以下とアクリロニトリル単位以外のビニル系モノマー単位２質量％以上１０質量％以下との２種のモノマー単位からなることが好ましい。
アクリロニトリル単位が９０質量％以上であると良好な強度を有しやすく、紡績工程での工程通過性も良好で優れた紡績糸を得ることができやすく、９８質量％以下であると紡糸工程での延伸性が良好となりやすい。上記観点から、アクリロニトリル単位は９１質量％以上９７質量％以下がより好ましく、９２質量％以上９６質量％以下が更に好ましい。
アクリロニトリル単位以外のビニル系モノマー単位が２質量％以上であると紡糸工程での延伸性が良好となりやすいため好ましく、１０質量％以下であると優れた強度を得やすくなるので好ましい。
上記観点から、アクリロニトリル単位以外のビニル系モノマー単位は３質量％以上９質量％以下がより好ましく、４質量％以上８質量％以下が更に好ましい。 The acrylic fiber of the present invention preferably comprises two types of monomer units: 90% by mass or more and 98% by mass or less of the acrylonitrile unit and 2% by mass or more and 10% by mass or less of the vinyl-based monomer unit other than the acrylonitrile unit.
When the acrylonitrile unit is 90% by mass or more, it tends to have good strength, and when it is 98% by mass or less, it is easy to obtain an excellent spun yarn with good process passability in the spinning process. Stretchability tends to be good. From the above viewpoint, the acrylonitrile unit is more preferably 91% by mass or more and 97% by mass or less, and further preferably 92% by mass or more and 96% by mass or less.
When the vinyl-based monomer unit other than the acrylonitrile unit is 2% by mass or more, the stretchability in the spinning step tends to be good, and when it is 10% by mass or less, excellent strength can be easily obtained, which is preferable.
From the above viewpoint, the vinyl-based monomer unit other than the acrylonitrile unit is more preferably 3% by mass or more and 9% by mass or less, and further preferably 4% by mass or more and 8% by mass or less.
アクリロニトリル単位が９０質量％以上であると良好な強度を有しやすく、紡績工程での工程通過性も良好で優れた紡績糸を得ることができやすく、９８質量％以下であると紡糸工程での延伸性が良好となりやすい。上記観点から、アクリロニトリル単位は９１質量％以上９７質量％以下がより好ましく、９２質量％以上９６質量％以下が更に好ましい。
アクリロニトリル単位以外のビニル系モノマー単位が２質量％以上であると紡糸工程での延伸性が良好となりやすいため好ましく、１０質量％以下であると優れた強度を得やすくなるので好ましい。
上記観点から、アクリロニトリル単位以外のビニル系モノマー単位は３質量％以上９質量％以下がより好ましく、４質量％以上８質量％以下が更に好ましい。 The acrylic fiber of the present invention preferably comprises two types of monomer units: 90% by mass or more and 98% by mass or less of the acrylonitrile unit and 2% by mass or more and 10% by mass or less of the vinyl-based monomer unit other than the acrylonitrile unit.
When the acrylonitrile unit is 90% by mass or more, it tends to have good strength, and when it is 98% by mass or less, it is easy to obtain an excellent spun yarn with good process passability in the spinning process. Stretchability tends to be good. From the above viewpoint, the acrylonitrile unit is more preferably 91% by mass or more and 97% by mass or less, and further preferably 92% by mass or more and 96% by mass or less.
When the vinyl-based monomer unit other than the acrylonitrile unit is 2% by mass or more, the stretchability in the spinning step tends to be good, and when it is 10% by mass or less, excellent strength can be easily obtained, which is preferable.
From the above viewpoint, the vinyl-based monomer unit other than the acrylonitrile unit is more preferably 3% by mass or more and 9% by mass or less, and further preferably 4% by mass or more and 8% by mass or less.
アクリロニトリル単位以外のビニル系モノマーとしてはアクリロニトリルと共重合可能な成分であればよく、アクリル酸、メタクリル酸、若しくはこれらのアルキルエステル類、酢酸ビニル、アクリルアミド、塩化ビニル、塩化ビニリデン、さらに目的によってはビニルベンゼンスルホン酸ソーダ、メタリルスルホン酸ソーダ、アリルスルホン酸ソーダ、アクリルアミドメチルプロパンスルホン酸ソーダ、ソディウムパラスルホフェニールメタリルエ－テル等のイオン性不飽和単量体を用いることができる。
なかでもアクリル酸、メタクリル酸、若しくはこれらのアルキルエステル類、酢酸ビニル、アクリルアミド、塩化ビニル、塩化ビニリデンが取扱い性・重合安定性・コストの点で好ましい。 The vinyl-based monomer other than the acrylonitrile unit may be a component copolymerizable with acrylonitrile, and may be acrylic acid, methacrylic acid, or alkyl esters thereof, vinyl acetate, acrylamide, vinyl chloride, vinylidene chloride, or vinyl depending on the purpose. Ionic unsaturated monomers such as sodium benzene sulfonate, sodium methallyl sulfonate, sodium allyl sulfonate, sodium acrylamide methylpropan sulfonate, and sodium parasulfophenyl metalyl ether can be used.
Of these, acrylic acid, methacrylic acid, or alkyl esters thereof, vinyl acetate, acrylamide, vinyl chloride, and vinylidene chloride are preferable in terms of handleability, polymerization stability, and cost.
なかでもアクリル酸、メタクリル酸、若しくはこれらのアルキルエステル類、酢酸ビニル、アクリルアミド、塩化ビニル、塩化ビニリデンが取扱い性・重合安定性・コストの点で好ましい。 The vinyl-based monomer other than the acrylonitrile unit may be a component copolymerizable with acrylonitrile, and may be acrylic acid, methacrylic acid, or alkyl esters thereof, vinyl acetate, acrylamide, vinyl chloride, vinylidene chloride, or vinyl depending on the purpose. Ionic unsaturated monomers such as sodium benzene sulfonate, sodium methallyl sulfonate, sodium allyl sulfonate, sodium acrylamide methylpropan sulfonate, and sodium parasulfophenyl metalyl ether can be used.
Of these, acrylic acid, methacrylic acid, or alkyl esters thereof, vinyl acetate, acrylamide, vinyl chloride, and vinylidene chloride are preferable in terms of handleability, polymerization stability, and cost.
本発明のアクリル繊維は、単繊維繊度が０．６ｄｔｅｘ以上３．３ｄｔｅｘ以下であることが好ましい。
前記単繊維繊度が０．６ｄｔｅｘ以上であると、紡績工程での通過性がよく高い生産性を出しやすく、３．３ｄｔｅｘ以下であるとソフトタッチで良好な風合いの編地が得られ易い。
これらの観点から、前記単繊維繊度は１．２ｄｔｅｘ以上３．０ｄｔｅｘ以下がより好ましく、１．７ｄｔｅｘ以上２．８ｄｔｅｘ以下がさらに好ましい。 The acrylic fiber of the present invention preferably has a single fiber fineness of 0.6 dtex or more and 3.3 dtex or less.
When the single fiber fineness is 0.6 dtex or more, the passability in the spinning process is good and high productivity is easily obtained, and when it is 3.3 dtex or less, a knitted fabric having a good texture with a soft touch is easily obtained.
From these viewpoints, the single fiber fineness is more preferably 1.2 dtex or more and 3.0 dtex or less, and further preferably 1.7 dtex or more and 2.8 dtex or less.
前記単繊維繊度が０．６ｄｔｅｘ以上であると、紡績工程での通過性がよく高い生産性を出しやすく、３．３ｄｔｅｘ以下であるとソフトタッチで良好な風合いの編地が得られ易い。
これらの観点から、前記単繊維繊度は１．２ｄｔｅｘ以上３．０ｄｔｅｘ以下がより好ましく、１．７ｄｔｅｘ以上２．８ｄｔｅｘ以下がさらに好ましい。 The acrylic fiber of the present invention preferably has a single fiber fineness of 0.6 dtex or more and 3.3 dtex or less.
When the single fiber fineness is 0.6 dtex or more, the passability in the spinning process is good and high productivity is easily obtained, and when it is 3.3 dtex or less, a knitted fabric having a good texture with a soft touch is easily obtained.
From these viewpoints, the single fiber fineness is more preferably 1.2 dtex or more and 3.0 dtex or less, and further preferably 1.7 dtex or more and 2.8 dtex or less.
本発明のアクリル繊維は、単繊維の繊維長が２５ｍｍ以上１００ｍｍ以下であることが好ましい。
この範囲であれば、単繊維繊度が細くても紡績糸の製造がし易い。この観点から本発明のアクリル繊維の繊維長は、３０ｍｍ以上７０ｍｍ以下がより好ましく、３５ｍｍ以上５５ｍｍ以下がさらに好ましい。 The acrylic fiber of the present invention preferably has a single fiber having a fiber length of 25 mm or more and 100 mm or less.
Within this range, spun yarn can be easily manufactured even if the single fiber fineness is fine. From this viewpoint, the fiber length of the acrylic fiber of the present invention is more preferably 30 mm or more and 70 mm or less, and further preferably 35 mm or more and 55 mm or less.
この範囲であれば、単繊維繊度が細くても紡績糸の製造がし易い。この観点から本発明のアクリル繊維の繊維長は、３０ｍｍ以上７０ｍｍ以下がより好ましく、３５ｍｍ以上５５ｍｍ以下がさらに好ましい。 The acrylic fiber of the present invention preferably has a single fiber having a fiber length of 25 mm or more and 100 mm or less.
Within this range, spun yarn can be easily manufactured even if the single fiber fineness is fine. From this viewpoint, the fiber length of the acrylic fiber of the present invention is more preferably 30 mm or more and 70 mm or less, and further preferably 35 mm or more and 55 mm or less.
本発明のアクリル繊維は、前記酸化チタンの一次粒子径が０．１μｍ以上１．０μｍ以下であることが好ましい。前記一次粒子径が０．１μｍ以上であれば二次凝集が少ないので紡糸原液中の安定性がよく、１．０μｍ以下であれば十分に粒子径が小さいのでノズル詰り・糸切れなどが起こり難い。
前記酸化チタンの結晶構造は特に問わないが、アナターゼ型であると色味の違いから良好なダル感を持たせることができやすくなる。
したがって、前記酸化チタンは、アナターゼ型であり、一次粒子径が０．１μｍ以上１．０μｍ以下であることが特に好ましい。 The acrylic fiber of the present invention preferably has a titanium oxide primary particle size of 0.1 μm or more and 1.0 μm or less. If the primary particle size is 0.1 μm or more, the secondary agglutination is small and the stability in the spinning stock solution is good. If the primary particle size is 1.0 μm or less, the particle size is sufficiently small and nozzle clogging and yarn breakage are unlikely to occur. ..
The crystal structure of the titanium oxide is not particularly limited, but the anatase type makes it easier to give a good dull feeling due to the difference in color.
Therefore, it is particularly preferable that the titanium oxide is anatase type and has a primary particle size of 0.1 μm or more and 1.0 μm or less.
前記酸化チタンの結晶構造は特に問わないが、アナターゼ型であると色味の違いから良好なダル感を持たせることができやすくなる。
したがって、前記酸化チタンは、アナターゼ型であり、一次粒子径が０．１μｍ以上１．０μｍ以下であることが特に好ましい。 The acrylic fiber of the present invention preferably has a titanium oxide primary particle size of 0.1 μm or more and 1.0 μm or less. If the primary particle size is 0.1 μm or more, the secondary agglutination is small and the stability in the spinning stock solution is good. If the primary particle size is 1.0 μm or less, the particle size is sufficiently small and nozzle clogging and yarn breakage are unlikely to occur. ..
The crystal structure of the titanium oxide is not particularly limited, but the anatase type makes it easier to give a good dull feeling due to the difference in color.
Therefore, it is particularly preferable that the titanium oxide is anatase type and has a primary particle size of 0.1 μm or more and 1.0 μm or less.
本発明のアクリル繊維は、従来公知の重合方法、例えば、懸濁重合にてアクリロニトリル共重合体を合成する。アクリロニトリル共重合体を溶解する溶剤は、特に限定はなく、例えば、ジメチルアセトアミド、ジメチルホルムアミド、ジメチルスルホキシド、チオシアン酸ナトリウム、ロダンソーダが使用できる。中でも、凝固が早く、吐出孔の形状と同じ繊維断面にしやすい観点から、ジメチルアセトアミド、ジメチルホルムアミドが好ましい。
The acrylic fiber of the present invention synthesizes an acrylonitrile copolymer by a conventionally known polymerization method, for example, suspension polymerization. The solvent for dissolving the acrylonitrile copolymer is not particularly limited, and for example, dimethylacetamide, dimethylformamide, dimethyl sulfoxide, sodium thiocyanate, and rodan soda can be used. Of these, dimethylacetamide and dimethylformamide are preferable from the viewpoint of quick solidification and easy formation of a fiber cross section having the same shape as the discharge hole.
紡糸方法は、特に限定はなく、例えば、湿式紡糸、乾式紡糸、乾湿式紡糸、溶融紡糸が使用できる。中でも、凝固が早い湿式紡糸が好ましい。以下、アクリル繊維を湿式紡糸にて製造する方法について説明するが、これに限定されるものではない。
例えば、懸濁重合にて得られたアクリロニトリル共重合体を、溶剤と水とが混合した凝固液中で紡糸して凝固糸を得る。 The spinning method is not particularly limited, and for example, wet spinning, dry spinning, dry wet spinning, and melt spinning can be used. Of these, wet spinning that solidifies quickly is preferable. Hereinafter, a method for producing acrylic fiber by wet spinning will be described, but the present invention is not limited to this.
For example, the acrylonitrile copolymer obtained by suspension polymerization is spun in a coagulation liquid in which a solvent and water are mixed to obtain a coagulated yarn.
例えば、懸濁重合にて得られたアクリロニトリル共重合体を、溶剤と水とが混合した凝固液中で紡糸して凝固糸を得る。 The spinning method is not particularly limited, and for example, wet spinning, dry spinning, dry wet spinning, and melt spinning can be used. Of these, wet spinning that solidifies quickly is preferable. Hereinafter, a method for producing acrylic fiber by wet spinning will be described, but the present invention is not limited to this.
For example, the acrylonitrile copolymer obtained by suspension polymerization is spun in a coagulation liquid in which a solvent and water are mixed to obtain a coagulated yarn.
アクリロニトリル共重合体から凝固糸を得る過程において、凝固液に使用する溶剤は、アクリルニトリル共重合体を溶解する溶剤と同じが好ましい。また、凝固液の溶剤濃度は、２５質量％以上４５質量％以下が好ましい。溶剤濃度が２５質量％以上であれば、繊維を延伸し易く、４５質量％以下であれば、凝固が早くでき、吐出孔の形状と同じ繊維断面にし易い。これらの観点から、前記溶剤濃度は、３０質量％以上４０質量％以下がより好ましい。
凝固液の温度は、３０℃以上５０℃以下であることが好ましい。この温度範囲であれば、凝固が早くでき、吐出孔の形状と同じ繊維断面にし易い。この観点から、前記凝固液の温度は、３５℃以上４５℃以下であることがより好ましい。 In the process of obtaining the coagulated yarn from the acrylonitrile copolymer, the solvent used in the coagulating liquid is preferably the same as the solvent that dissolves the acrylonitrile copolymer. The solvent concentration of the coagulation liquid is preferably 25% by mass or more and 45% by mass or less. When the solvent concentration is 25% by mass or more, the fiber can be easily stretched, and when it is 45% by mass or less, solidification can be performed quickly and the fiber cross section having the same shape as the discharge hole can be easily obtained. From these viewpoints, the solvent concentration is more preferably 30% by mass or more and 40% by mass or less.
The temperature of the coagulating liquid is preferably 30 ° C. or higher and 50 ° C. or lower. Within this temperature range, solidification can be performed quickly, and it is easy to obtain a fiber cross section having the same shape as the discharge hole. From this viewpoint, the temperature of the coagulating liquid is more preferably 35 ° C. or higher and 45 ° C. or lower.
凝固液の温度は、３０℃以上５０℃以下であることが好ましい。この温度範囲であれば、凝固が早くでき、吐出孔の形状と同じ繊維断面にし易い。この観点から、前記凝固液の温度は、３５℃以上４５℃以下であることがより好ましい。 In the process of obtaining the coagulated yarn from the acrylonitrile copolymer, the solvent used in the coagulating liquid is preferably the same as the solvent that dissolves the acrylonitrile copolymer. The solvent concentration of the coagulation liquid is preferably 25% by mass or more and 45% by mass or less. When the solvent concentration is 25% by mass or more, the fiber can be easily stretched, and when it is 45% by mass or less, solidification can be performed quickly and the fiber cross section having the same shape as the discharge hole can be easily obtained. From these viewpoints, the solvent concentration is more preferably 30% by mass or more and 40% by mass or less.
The temperature of the coagulating liquid is preferably 30 ° C. or higher and 50 ° C. or lower. Within this temperature range, solidification can be performed quickly, and it is easy to obtain a fiber cross section having the same shape as the discharge hole. From this viewpoint, the temperature of the coagulating liquid is more preferably 35 ° C. or higher and 45 ° C. or lower.
次に、得られた凝固糸を延伸する。
凝固糸の延伸は、湿熱延伸と乾熱延伸の２段、例えば、９０℃以上の熱水（沸水）中で一段目の延伸（湿熱延伸）を施し、続いて油剤を付着させ熱ローラーで乾燥後、さらに乾熱状態で２段目の延伸（乾熱延伸）を施す。このように凝固糸の延伸を２段階で実施すると、Ｋ積の値をコントロールしやすいので好ましい。
湿熱延伸倍率は、３倍以上５倍以下、乾熱延伸は１．１倍以上１．５倍以下の範囲が好ましい。 Next, the obtained coagulated yarn is drawn.
The coagulated yarn is stretched in two stages, moist heat stretching and dry heat stretching, for example, the first stage stretching (wet heat stretching) in hot water (boiling water) at 90 ° C. or higher, followed by adhering an oil agent and drying with a hot roller. After that, the second stage stretching (dry heat stretching) is further performed in a dry heat state. It is preferable to stretch the coagulated yarn in two steps in this way because it is easy to control the value of the K product.
The wet heat stretching ratio is preferably 3 times or more and 5 times or less, and the dry heat stretching ratio is preferably 1.1 times or more and 1.5 times or less.
凝固糸の延伸は、湿熱延伸と乾熱延伸の２段、例えば、９０℃以上の熱水（沸水）中で一段目の延伸（湿熱延伸）を施し、続いて油剤を付着させ熱ローラーで乾燥後、さらに乾熱状態で２段目の延伸（乾熱延伸）を施す。このように凝固糸の延伸を２段階で実施すると、Ｋ積の値をコントロールしやすいので好ましい。
湿熱延伸倍率は、３倍以上５倍以下、乾熱延伸は１．１倍以上１．５倍以下の範囲が好ましい。 Next, the obtained coagulated yarn is drawn.
The coagulated yarn is stretched in two stages, moist heat stretching and dry heat stretching, for example, the first stage stretching (wet heat stretching) in hot water (boiling water) at 90 ° C. or higher, followed by adhering an oil agent and drying with a hot roller. After that, the second stage stretching (dry heat stretching) is further performed in a dry heat state. It is preferable to stretch the coagulated yarn in two steps in this way because it is easy to control the value of the K product.
The wet heat stretching ratio is preferably 3 times or more and 5 times or less, and the dry heat stretching ratio is preferably 1.1 times or more and 1.5 times or less.
凝固糸を延伸後、必要に応じ緩和処理を行い、アクリル繊維が得られる。
緩和処理は、加圧スチームで行うのが好ましく、その圧力は、抗ピル性向上の観点から、０．１０ＭＰａ以上０．１８ＭＰａ以下であることが好ましく、０．１１ＭＰａ以上０．１６ＭＰａ以下がさらに好ましい。 After drawing the coagulated yarn, relaxation treatment is performed as necessary to obtain acrylic fibers.
The relaxation treatment is preferably carried out with pressurized steam, and the pressure is preferably 0.10 MPa or more and 0.18 MPa or less, more preferably 0.11 MPa or more and 0.16 MPa or less, from the viewpoint of improving anti-pill property. ..
緩和処理は、加圧スチームで行うのが好ましく、その圧力は、抗ピル性向上の観点から、０．１０ＭＰａ以上０．１８ＭＰａ以下であることが好ましく、０．１１ＭＰａ以上０．１６ＭＰａ以下がさらに好ましい。 After drawing the coagulated yarn, relaxation treatment is performed as necessary to obtain acrylic fibers.
The relaxation treatment is preferably carried out with pressurized steam, and the pressure is preferably 0.10 MPa or more and 0.18 MPa or less, more preferably 0.11 MPa or more and 0.16 MPa or less, from the viewpoint of improving anti-pill property. ..
本発明の紡績糸は、前記アクリル繊維の含有率が３０質量％以上である。
前記アクリル繊維の含有率が３０質量％以上であれば、高い紫外線遮蔽性能と高い抗ピル性が得られる。前記観点から、前記アクリル繊維の含有率が３５質量％以上であることが好ましく、４０質量％以上であることが更に好ましい。 The spun yarn of the present invention has an acrylic fiber content of 30% by mass or more.
When the content of the acrylic fiber is 30% by mass or more, high ultraviolet shielding performance and high anti-pill property 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.
前記アクリル繊維の含有率が３０質量％以上であれば、高い紫外線遮蔽性能と高い抗ピル性が得られる。前記観点から、前記アクリル繊維の含有率が３５質量％以上であることが好ましく、４０質量％以上であることが更に好ましい。 The spun yarn of the present invention has an acrylic fiber content of 30% by mass or more.
When the content of the acrylic fiber is 30% by mass or more, high ultraviolet shielding performance and high anti-pill property 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.
本発明の紡績糸は単糸、双糸、三子糸のいずれかであり、それらのいずれでも良いが、紡績糸の強度と風合いの観点から、双糸が好ましい。
The spun yarn of the present invention may be a single yarn, a twin yarn, or a triple yarn, and any of them may be used, but the twin yarn is preferable from the viewpoint of the strength and texture of the spun yarn.
本発明の紡績糸は、トータル番手が、綿番手で１０番以上４０番以下である。前記綿番手が１０番以上であれば、糸が太くなり過ぎず、春夏向けの薄い生地を作りやすくでき、４０番以下であれば紫外線遮蔽効果を得られやすくなる。
これらの観点から、前記紡績糸のトータル番手は、１３番以上３５番以下がより好ましく、１５番以上３０番以下がさらに好ましい。
また、前記のとおり、本発明の紡績糸の番手は、トータル番手としていることから、双糸であれば、２０／２～８０／２の範囲となる。 The spun yarn of the present invention has a total count of 10 or more and 40 or less in cotton count. If the cotton count is 10 or more, the thread does not become too thick and it is easy to make a thin fabric for spring and summer, and if it is 40 or less, the ultraviolet shielding effect can be easily obtained.
From these viewpoints, the total count of the spun yarn is more preferably 13 or more and 35 or less, and further preferably 15 or more and 30 or less.
Further, as described above, since the count of the spun yarn of the present invention is the total count, the count of the twin yarn is in the range of 20/2 to 80/2.
これらの観点から、前記紡績糸のトータル番手は、１３番以上３５番以下がより好ましく、１５番以上３０番以下がさらに好ましい。
また、前記のとおり、本発明の紡績糸の番手は、トータル番手としていることから、双糸であれば、２０／２～８０／２の範囲となる。 The spun yarn of the present invention has a total count of 10 or more and 40 or less in cotton count. If the cotton count is 10 or more, the thread does not become too thick and it is easy to make a thin fabric for spring and summer, and if it is 40 or less, the ultraviolet shielding effect can be easily obtained.
From these viewpoints, the total count of the spun yarn is more preferably 13 or more and 35 or less, and further preferably 15 or more and 30 or less.
Further, as described above, since the count of the spun yarn of the present invention is the total count, the count of the twin yarn is in the range of 20/2 to 80/2.
本発明の編地の第一の形態は、前記アクリル繊維を４０質量％以上含有し、目付が５０ｇ／ｍ２以上５００ｇ／ｍ２以下であり、ＵＰＦが２５以上、紫外線遮蔽率が９０％以上である。
前記アクリル繊維を４０質量％以上含有する編地であれば、紫外線遮蔽性能と抗ピル性を高くできる。これらの観点から、前記アクリル繊維を４５質量％以上含有することがより好ましく、５０質量％以上含有することが更に好ましい。
前記記載の編地の目付は５０ｇ／ｍ２以上であれば良好な紫外線遮蔽性能を示し、５００ｇ／ｍ２以下であれば主な用途である夏用衣料に適している。上記観点から、編地の目付は７５ｇ／ｍ２以上４５０ｇ／ｍ２以下がより好ましく、１００ｇ／ｍ２以上４００ｇ／ｍ２以下がさらに好ましい。
紫外線遮蔽性としてＵＰＦが２５以上であれば十分な紫外線遮蔽性能を有しており、３０以上あればより好ましく、３５以上出ればさらに好ましい。同様に紫外線遮蔽率は９０％以上であればよく、９３％以上であればより好ましく、９５％以上であればさらに好ましい。 The first form of the knitted fabric of the present invention contains the acrylic fiber in an amount of 40% by mass or more, has a basis weight of 50 g / m 2 or more and 500 g / m 2 or less, has an UPF of 25 or more, and has an ultraviolet shielding rate of 90% or more. Is.
A knitted fabric containing 40% by mass or more of the acrylic fiber can have high ultraviolet shielding performance and anti-pill property. From these viewpoints, it is more preferable to contain the acrylic fiber in an amount of 45% by mass or more, and even more preferably 50% by mass or more.
If the basis weight of the above-mentioned knitted fabric is 50 g / m 2 or more, it shows good ultraviolet shielding performance, and if it is 500 g / m 2 or less, it is suitable for summer clothing, which is the main application. From the above viewpoint, the basis weight of the knitted fabric is more preferably 75 g / m 2 or more and 450 g / m 2 or less, and further preferably 100 g / m 2 or more and 400 g / m 2 or less.
As for the ultraviolet shielding property, when the UPF is 25 or more, it has sufficient ultraviolet shielding performance, 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 even more preferably 95% or more.
前記アクリル繊維を４０質量％以上含有する編地であれば、紫外線遮蔽性能と抗ピル性を高くできる。これらの観点から、前記アクリル繊維を４５質量％以上含有することがより好ましく、５０質量％以上含有することが更に好ましい。
前記記載の編地の目付は５０ｇ／ｍ２以上であれば良好な紫外線遮蔽性能を示し、５００ｇ／ｍ２以下であれば主な用途である夏用衣料に適している。上記観点から、編地の目付は７５ｇ／ｍ２以上４５０ｇ／ｍ２以下がより好ましく、１００ｇ／ｍ２以上４００ｇ／ｍ２以下がさらに好ましい。
紫外線遮蔽性としてＵＰＦが２５以上であれば十分な紫外線遮蔽性能を有しており、３０以上あればより好ましく、３５以上出ればさらに好ましい。同様に紫外線遮蔽率は９０％以上であればよく、９３％以上であればより好ましく、９５％以上であればさらに好ましい。 The first form of the knitted fabric of the present invention contains the acrylic fiber in an amount of 40% by mass or more, has a basis weight of 50 g / m 2 or more and 500 g / m 2 or less, has an UPF of 25 or more, and has an ultraviolet shielding rate of 90% or more. Is.
A knitted fabric containing 40% by mass or more of the acrylic fiber can have high ultraviolet shielding performance and anti-pill property. From these viewpoints, it is more preferable to contain the acrylic fiber in an amount of 45% by mass or more, and even more preferably 50% by mass or more.
If the basis weight of the above-mentioned knitted fabric is 50 g / m 2 or more, it shows good ultraviolet shielding performance, and if it is 500 g / m 2 or less, it is suitable for summer clothing, which is the main application. From the above viewpoint, the basis weight of the knitted fabric is more preferably 75 g / m 2 or more and 450 g / m 2 or less, and further preferably 100 g / m 2 or more and 400 g / m 2 or less.
As for the ultraviolet shielding property, when the UPF is 25 or more, it has sufficient ultraviolet shielding performance, 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 even more preferably 95% or more.
本発明の編地の第二の形態は、前記紡績糸の含有率が８０質量％以上である。
前記紡績糸の含有率が８０質量％以上であれば良好な紫外線遮蔽性能を示す。この観点から、前記紡績糸の含有率は８５質量％以上であることがより好ましく、９０質量％以上であることがさらに好ましい。 In the second form 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, good ultraviolet shielding performance is exhibited. From this viewpoint, the content of the spun yarn is more preferably 85% by mass or more, and further preferably 90% by mass or more.
前記紡績糸の含有率が８０質量％以上であれば良好な紫外線遮蔽性能を示す。この観点から、前記紡績糸の含有率は８５質量％以上であることがより好ましく、９０質量％以上であることがさらに好ましい。 In the second form 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, good ultraviolet shielding performance is exhibited. From this viewpoint, the content of the spun yarn is more preferably 85% by mass or more, and further preferably 90% by mass or more.
第二の形態の編地は、ＵＰＦが２５以上であることが好ましい。ＵＰＦが２５以上であれば十分な紫外線遮蔽性能を有しており、３０以上あればより好ましく、３５以上あればさらに好ましい。同様に紫外線遮蔽率は９０％以上であることが好ましく、９３％以上であればより好ましく、９５％以上であればさらに好ましい。
The knitted fabric of the second form preferably has an UPF of 25 or more. When the UPF is 25 or more, it has sufficient ultraviolet shielding performance, 30 or more is more preferable, and 35 or more is further preferable. Similarly, the ultraviolet shielding rate is preferably 90% or more, more preferably 93% or more, and even more preferably 95% or more.
第二形態の編地は、抗ピル性が４級以上であることが好ましい。
抗ピル性が４級以上であれば、衣服に毛玉が付きにくくなる。
また、第二形態の編地は、Ｌ＊値が５０以上であることが好ましい。Ｌ＊値が５０以上であれば、淡色でも紫外線遮蔽効果が得られる効果を奏する。この観点から、Ｌ＊値は７０以上であることがより好ましく、８５以上がさらに好ましい。 The second form of knitted fabric preferably has an anti-pill property of grade 4 or higher.
If the anti-pill property is grade 4 or higher, pills are less likely to adhere to clothes.
The knitted fabric of the second form preferably has an L * value of 50 or more. If the L * value is 50 or more, the effect of obtaining an ultraviolet shielding effect can be obtained even in a light color. From this viewpoint, the L * value is more preferably 70 or more, and further preferably 85 or more.
抗ピル性が４級以上であれば、衣服に毛玉が付きにくくなる。
また、第二形態の編地は、Ｌ＊値が５０以上であることが好ましい。Ｌ＊値が５０以上であれば、淡色でも紫外線遮蔽効果が得られる効果を奏する。この観点から、Ｌ＊値は７０以上であることがより好ましく、８５以上がさらに好ましい。 The second form of knitted fabric preferably has an anti-pill property of grade 4 or higher.
If the anti-pill property is grade 4 or higher, pills are less likely to adhere to clothes.
The knitted fabric of the second form preferably has an L * value of 50 or more. If the L * value is 50 or more, the effect of obtaining an ultraviolet shielding effect can be obtained even in a light color. From this viewpoint, the L * value is more preferably 70 or more, and further preferably 85 or more.
以下、本発明を実施例により具体的に説明する。尚、実施例における各項目の測定は次の方法に拠った。
（単繊維繊度の測定方法）
オートバイブロ式繊度測定器（サーチ制御電気社製、ＤｅｎｉｏｒＣｏｍｐｕｔｅｒＤＣ－１１）を使用し、温度２５℃、湿度６５％の条件下で単繊維繊度（ｄｔｅｘ）を測定した。測定は、２５回行い、平均値を使用した。 Hereinafter, the present invention will be specifically described with reference to Examples. The measurement of each item in the examples was based on the following method.
(Measuring method of single fiber fineness)
A single fiber fineness (dtex) was measured under the conditions of a temperature of 25 ° C. and a humidity of 65% using a motorcycle blow type fineness measuring device (DeniorComputerDC-11 manufactured by Search Control Electric Co., Ltd.). The measurement was performed 25 times and the average value was used.
（単繊維繊度の測定方法）
オートバイブロ式繊度測定器（サーチ制御電気社製、ＤｅｎｉｏｒＣｏｍｐｕｔｅｒＤＣ－１１）を使用し、温度２５℃、湿度６５％の条件下で単繊維繊度（ｄｔｅｘ）を測定した。測定は、２５回行い、平均値を使用した。 Hereinafter, the present invention will be specifically described with reference to Examples. The measurement of each item in the examples was based on the following method.
(Measuring method of single fiber fineness)
A single fiber fineness (dtex) was measured under the conditions of a temperature of 25 ° C. and a humidity of 65% using a motorcycle blow type fineness measuring device (DeniorComputerDC-11 manufactured by Search Control Electric Co., Ltd.). The measurement was performed 25 times and the average value was used.
（強伸度、結節強伸度、及びＫ積の測定）
ＪＩＳ－Ｌ１０１５－８．７（引張強さ及び伸び率）、８．８（結節強さ）に準拠して、標準状態における強伸度（強度（ｃＮ／ｄｔｅｘ）、伸度（％））、結節強伸度（結節強度（ｃＮ／ｄｔｅｘ）と結節伸度（％））を求め、結節強度と結節伸度の積をＫ積とした。 (Measurement of strong elongation, nodular strong elongation, and K product)
Strong elongation (strength (cN / dtex), elongation (%)) under standard conditions in accordance with JIS-L1015-8.7 (tensile strength and elongation), 8.8 (nodule strength), The nodule strength elongation (nodule strength (cN / dtex) and nodule elongation (%)) was determined, and the product of the nodule strength and the nodule elongation was defined as the K product.
ＪＩＳ－Ｌ１０１５－８．７（引張強さ及び伸び率）、８．８（結節強さ）に準拠して、標準状態における強伸度（強度（ｃＮ／ｄｔｅｘ）、伸度（％））、結節強伸度（結節強度（ｃＮ／ｄｔｅｘ）と結節伸度（％））を求め、結節強度と結節伸度の積をＫ積とした。 (Measurement of strong elongation, nodular strong elongation, and K product)
Strong elongation (strength (cN / dtex), elongation (%)) under standard conditions in accordance with JIS-L1015-8.7 (tensile strength and elongation), 8.8 (nodule strength), The nodule strength elongation (nodule strength (cN / dtex) and nodule elongation (%)) was determined, and the product of the nodule strength and the nodule elongation was defined as the K product.
（ＵＰＦ）
衣料品による紫外線防止効果を客観的に評価するために定めたれている指標ＵＰＦ（紫外線防止指数）のＡＳ／ＮＺＳ４３９９に準拠して編地を測定した。 (UPF)
The knitted fabric was measured in accordance with AS / NZS4399, which is an index UPF (ultraviolet protection index) defined for objectively evaluating the ultraviolet protection effect of clothing.
衣料品による紫外線防止効果を客観的に評価するために定めたれている指標ＵＰＦ（紫外線防止指数）のＡＳ／ＮＺＳ４３９９に準拠して編地を測定した。 (UPF)
The knitted fabric was measured in accordance with AS / NZS4399, which is an index UPF (ultraviolet protection index) defined for objectively evaluating the ultraviolet protection effect of clothing.
（紫外線遮蔽率）
紫外線遮蔽率は、紫外線遮蔽率（％）＝１００－［波長２８０～４００ｎｍの平均透過率（％）］の式を用いて算出した。 (UV shielding rate)
The ultraviolet shielding rate was calculated using the formula of ultraviolet shielding rate (%) = 100- [average transmittance (%) at a wavelength of 280 to 400 nm].
紫外線遮蔽率は、紫外線遮蔽率（％）＝１００－［波長２８０～４００ｎｍの平均透過率（％）］の式を用いて算出した。 (UV shielding rate)
The ultraviolet shielding rate was calculated using the formula of ultraviolet shielding rate (%) = 100- [average transmittance (%) at a wavelength of 280 to 400 nm].
（抗ピル性）
抗ピル性はＪＩＳ－Ｌ－１０７６ Ａ法に準拠して測定した。 (Anti-pill)
Anti-pill property was measured according to JIS-L-1076 A method.
抗ピル性はＪＩＳ－Ｌ－１０７６ Ａ法に準拠して測定した。 (Anti-pill)
Anti-pill property was measured according to JIS-L-1076 A method.
（目付）
目付はＪＩＳ－Ｌ－１０９６－８．３．２（標準状態における単位面積当たりの質量）に準拠して測定した。 (Metsuke)
The basis weight was measured according to JIS-L-1096-8.3.2 (mass per unit area in the standard state).
目付はＪＩＳ－Ｌ－１０９６－８．３．２（標準状態における単位面積当たりの質量）に準拠して測定した。 (Metsuke)
The basis weight was measured according to JIS-L-1096-8.3.2 (mass per unit area in the standard state).
（実施例１）
アクリロニトリル単位が９３質量％、酢酸ビニル単位が７質量％からなる共重合体を水系懸濁重合により得た。この共重合体の０．５質量％ジメチルホルムアミド溶液の２５℃における還元粘度は２．０であった。
この共重合体をジメチルアセトアミドに溶解して共重合体濃度２４質量％のアクリロニトリル共重合体溶液とした。このアクリロニトリル共重合体溶液に、ジメチルアセトアミドに平均粒径０．６μｍの６酸化チタンを２０質量％含有・分散した分散液を、最終のアクリル繊維中の酸化チタン含有率が１．７質量％となるように添加し紡糸原液とした。
前記紡糸原液を７５℃に調節し、ジメチルアセトアミド３５質量％、温度４０℃の凝固液中に、一辺８０μｍの正三角形の形状をした吐出孔から押し出して湿式紡糸し、次いで沸水中で溶剤を洗浄しながら３．５倍の延伸を施し、続いて油剤を付着させ、熱ローラーで乾燥後、さらに乾熱状態で１．３倍に延伸した。その後、０．１３ＭＰａ（１．３ｋｇ／ｃｍ２）の加圧スチーム中で緩和処理を行って、単繊維繊度が２．２ｄｔｅｘの繊維を得た。
繊維物性を表１に示す。 (Example 1)
A copolymer composed of 93% by mass of acrylonitrile units and 7% by 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 ° C. was 2.0.
This copolymer was dissolved in dimethylacetamide to prepare an acrylonitrile copolymer solution having a copolymer concentration of 24% by mass. A dispersion containing 20% by mass of titanium hexaoxide having an average particle size of 0.6 μm in dimethylacetamide in this acrylonitrile copolymer solution was dispersed, and the titanium oxide content in the final acrylic fiber was 1.7% by mass. It was added so as to prepare a spinning stock solution.
The undiluted spinning solution is adjusted to 75 ° C., extruded into a coagulating solution having dimethylacetamide at 35% by mass and a temperature of 40 ° C. from an equilateral triangle-shaped discharge hole having a side of 80 μm for wet spinning, and then the solvent is washed in boiling water. While stretching 3.5 times, the oil agent was subsequently attached, dried with a hot roller, and further stretched 1.3 times in a dry state. Then, relaxation treatment was carried out in pressurized steam of 0.13 MPa (1.3 kg / cm 2 ) to obtain a fiber having a single fiber fineness of 2.2 dtex.
The physical characteristics of the fiber are shown in Table 1.
アクリロニトリル単位が９３質量％、酢酸ビニル単位が７質量％からなる共重合体を水系懸濁重合により得た。この共重合体の０．５質量％ジメチルホルムアミド溶液の２５℃における還元粘度は２．０であった。
この共重合体をジメチルアセトアミドに溶解して共重合体濃度２４質量％のアクリロニトリル共重合体溶液とした。このアクリロニトリル共重合体溶液に、ジメチルアセトアミドに平均粒径０．６μｍの６酸化チタンを２０質量％含有・分散した分散液を、最終のアクリル繊維中の酸化チタン含有率が１．７質量％となるように添加し紡糸原液とした。
前記紡糸原液を７５℃に調節し、ジメチルアセトアミド３５質量％、温度４０℃の凝固液中に、一辺８０μｍの正三角形の形状をした吐出孔から押し出して湿式紡糸し、次いで沸水中で溶剤を洗浄しながら３．５倍の延伸を施し、続いて油剤を付着させ、熱ローラーで乾燥後、さらに乾熱状態で１．３倍に延伸した。その後、０．１３ＭＰａ（１．３ｋｇ／ｃｍ２）の加圧スチーム中で緩和処理を行って、単繊維繊度が２．２ｄｔｅｘの繊維を得た。
繊維物性を表１に示す。 (Example 1)
A copolymer composed of 93% by mass of acrylonitrile units and 7% by 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 ° C. was 2.0.
This copolymer was dissolved in dimethylacetamide to prepare an acrylonitrile copolymer solution having a copolymer concentration of 24% by mass. A dispersion containing 20% by mass of titanium hexaoxide having an average particle size of 0.6 μm in dimethylacetamide in this acrylonitrile copolymer solution was dispersed, and the titanium oxide content in the final acrylic fiber was 1.7% by mass. It was added so as to prepare a spinning stock solution.
The undiluted spinning solution is adjusted to 75 ° C., extruded into a coagulating solution having dimethylacetamide at 35% by mass and a temperature of 40 ° C. from an equilateral triangle-shaped discharge hole having a side of 80 μm for wet spinning, and then the solvent is washed in boiling water. While stretching 3.5 times, the oil agent was subsequently attached, dried with a hot roller, and further stretched 1.3 times in a dry state. Then, relaxation treatment was carried out in pressurized steam of 0.13 MPa (1.3 kg / cm 2 ) to obtain a fiber having a single fiber fineness of 2.2 dtex.
The physical characteristics of the fiber are shown in Table 1.
（比較例１）
アクリロニトリル単位９５質量％、酢酸ビニル単位４．４質量％、メタリルスルホン酸ソーダ単位０．６質量％からなる共重合体を水系懸濁重合により得た。この共重合体の０．５質量％ジメチルホルムアミド溶液の２５℃における還元粘度は１．６であった。
この共重合体をジメチルアセトアミドに溶解して共重合体濃度２４質量％のアクリロニトリル共重合体溶液とした。このアクリロニトリル共重合体溶液を紡糸原液とした。
前記紡糸原液を７５℃に調節し、ジメチルアセトアミド３５質量％、温度４０℃の凝固液中に、直径４５μｍの丸形の形状をした吐出孔から押し出して湿式紡糸し、次いで沸水中で溶剤を洗浄しながら４．５倍の延伸を施し、続いて油剤を付着させ熱ローラーで乾燥後、０．２３ＭＰａ（２．３ｋｇ／ｃｍ２）の加圧スチーム中で緩和処理を行って、単繊維繊度が２．２ｄｔｅｘの繊維を得た。 (Comparative Example 1)
A copolymer composed of 95% by mass of acrylonitrile unit, 4.4% by mass of vinyl acetate unit, and 0.6% by mass of sodium metallyl sulfonate unit was obtained by aqueous suspension polymerization. The reduced viscosity of the 0.5 mass% dimethylformamide solution of this copolymer at 25 ° C. was 1.6.
This copolymer was dissolved in dimethylacetamide to prepare an acrylonitrile copolymer solution having a copolymer concentration of 24% by mass. This acrylonitrile copolymer solution was used as a spinning stock solution.
The undiluted spinning solution was adjusted to 75 ° C., extruded into a coagulating solution having dimethylacetamide at 35% by mass and a temperature of 40 ° C. from a round-shaped discharge hole having a diameter of 45 μm for wet spinning, and then the solvent was washed in boiling water. While stretching 4.5 times, the oil agent was attached, dried with a hot roller, and then relaxed in 0.23 MPa (2.3 kg / cm 2 ) pressure steam to reduce the single fiber fineness. 2.2 dtex fibers were obtained.
アクリロニトリル単位９５質量％、酢酸ビニル単位４．４質量％、メタリルスルホン酸ソーダ単位０．６質量％からなる共重合体を水系懸濁重合により得た。この共重合体の０．５質量％ジメチルホルムアミド溶液の２５℃における還元粘度は１．６であった。
この共重合体をジメチルアセトアミドに溶解して共重合体濃度２４質量％のアクリロニトリル共重合体溶液とした。このアクリロニトリル共重合体溶液を紡糸原液とした。
前記紡糸原液を７５℃に調節し、ジメチルアセトアミド３５質量％、温度４０℃の凝固液中に、直径４５μｍの丸形の形状をした吐出孔から押し出して湿式紡糸し、次いで沸水中で溶剤を洗浄しながら４．５倍の延伸を施し、続いて油剤を付着させ熱ローラーで乾燥後、０．２３ＭＰａ（２．３ｋｇ／ｃｍ２）の加圧スチーム中で緩和処理を行って、単繊維繊度が２．２ｄｔｅｘの繊維を得た。 (Comparative Example 1)
A copolymer composed of 95% by mass of acrylonitrile unit, 4.4% by mass of vinyl acetate unit, and 0.6% by mass of sodium metallyl sulfonate unit was obtained by aqueous suspension polymerization. The reduced viscosity of the 0.5 mass% dimethylformamide solution of this copolymer at 25 ° C. was 1.6.
This copolymer was dissolved in dimethylacetamide to prepare an acrylonitrile copolymer solution having a copolymer concentration of 24% by mass. This acrylonitrile copolymer solution was used as a spinning stock solution.
The undiluted spinning solution was adjusted to 75 ° C., extruded into a coagulating solution having dimethylacetamide at 35% by mass and a temperature of 40 ° C. from a round-shaped discharge hole having a diameter of 45 μm for wet spinning, and then the solvent was washed in boiling water. While stretching 4.5 times, the oil agent was attached, dried with a hot roller, and then relaxed in 0.23 MPa (2.3 kg / cm 2 ) pressure steam to reduce the single fiber fineness. 2.2 dtex fibers were obtained.
（比較例２）
アクリロニトリル単位が９３質量％、酢酸ビニル単位が７質量％からなる共重合体を水系懸濁重合により得た。この重合体の０．５質量％ジメチルホルムアミド溶液の２５℃における還元粘度は２．０であった。
この共重合体をジメチルアセトアミドに溶解して共重合体濃度２４質量％のアクリロニトリル共重合体溶液とした。このアクリロニトリル共重合体溶液に、ジメチルアセトアミドに平均粒径０．６μｍのアナターゼ型酸化チタンを２０質量％含有・分散した分散液を、最終のアクリル繊維中の酸化チタン含有率が１．７質量％となるように添加し紡糸原液とした。
前記紡糸原液を７５℃に調節し、ジメチルアセトアミド３５質量％、温度４０℃の凝固液中に、直径６０μｍの丸形の形状をした吐出孔から押し出して湿式紡糸し、次いで沸水中で溶剤を洗浄しながら４．５倍の延伸を施し、続いて油剤を付着させ熱ローラーで乾燥後、０．２３ＭＰａ（２．３ｋｇ／ｃｍ２）の加圧スチーム中で緩和処理を行って、単繊維繊度が１．７ｄｔｅｘの繊維を得た。 (Comparative Example 2)
A copolymer composed of 93% by mass of acrylonitrile units and 7% by mass of vinyl acetate units was obtained by aqueous suspension polymerization. The reduced viscosity of the 0.5 mass% dimethylformamide solution of this polymer at 25 ° C. was 2.0.
This copolymer was dissolved in dimethylacetamide to prepare an acrylonitrile copolymer solution having a copolymer concentration of 24% by mass. A dispersion containing 20% by mass of anatase-type titanium oxide having an average particle size of 0.6 μm in dimethylacetamide in this acrylonitrile copolymer solution is dispersed, and the titanium oxide content in the final acrylic fiber is 1.7% by mass. It was added so as to be a spinning stock solution.
The spinning stock solution is adjusted to 75 ° C., and is extruded from a round-shaped discharge hole having a diameter of 60 μm into a coagulating solution having dimethylacetamide of 35% by mass and a temperature of 40 ° C. for wet spinning, and then the solvent is washed in boiling water. While stretching 4.5 times, the oil agent was attached, dried with a hot roller, and then relaxed in 0.23 MPa (2.3 kg / cm 2 ) pressure steam to reduce the single fiber fineness. A fiber of 1.7 dtex was obtained.
アクリロニトリル単位が９３質量％、酢酸ビニル単位が７質量％からなる共重合体を水系懸濁重合により得た。この重合体の０．５質量％ジメチルホルムアミド溶液の２５℃における還元粘度は２．０であった。
この共重合体をジメチルアセトアミドに溶解して共重合体濃度２４質量％のアクリロニトリル共重合体溶液とした。このアクリロニトリル共重合体溶液に、ジメチルアセトアミドに平均粒径０．６μｍのアナターゼ型酸化チタンを２０質量％含有・分散した分散液を、最終のアクリル繊維中の酸化チタン含有率が１．７質量％となるように添加し紡糸原液とした。
前記紡糸原液を７５℃に調節し、ジメチルアセトアミド３５質量％、温度４０℃の凝固液中に、直径６０μｍの丸形の形状をした吐出孔から押し出して湿式紡糸し、次いで沸水中で溶剤を洗浄しながら４．５倍の延伸を施し、続いて油剤を付着させ熱ローラーで乾燥後、０．２３ＭＰａ（２．３ｋｇ／ｃｍ２）の加圧スチーム中で緩和処理を行って、単繊維繊度が１．７ｄｔｅｘの繊維を得た。 (Comparative Example 2)
A copolymer composed of 93% by mass of acrylonitrile units and 7% by mass of vinyl acetate units was obtained by aqueous suspension polymerization. The reduced viscosity of the 0.5 mass% dimethylformamide solution of this polymer at 25 ° C. was 2.0.
This copolymer was dissolved in dimethylacetamide to prepare an acrylonitrile copolymer solution having a copolymer concentration of 24% by mass. A dispersion containing 20% by mass of anatase-type titanium oxide having an average particle size of 0.6 μm in dimethylacetamide in this acrylonitrile copolymer solution is dispersed, and the titanium oxide content in the final acrylic fiber is 1.7% by mass. It was added so as to be a spinning stock solution.
The spinning stock solution is adjusted to 75 ° C., and is extruded from a round-shaped discharge hole having a diameter of 60 μm into a coagulating solution having dimethylacetamide of 35% by mass and a temperature of 40 ° C. for wet spinning, and then the solvent is washed in boiling water. While stretching 4.5 times, the oil agent was attached, dried with a hot roller, and then relaxed in 0.23 MPa (2.3 kg / cm 2 ) pressure steam to reduce the single fiber fineness. A fiber of 1.7 dtex was obtained.
（実施例２～５）
実施例１で得られた繊維を３８ｍｍにカットし、表２記載の混率にて、２インチ紡により綿番手で３０／２の紡績糸となし、１４ゲージ丸編み機を用いて、天竺組織に製編したのち、常法によりオフホワイトで染色を行い目付２５０ｇ／ｍ２の編地を作製した。 (Examples 2 to 5)
The fiber obtained in Example 1 was cut into 38 mm, spun yarn with a cotton count of 30/2 by 2-inch spinning at the mixing ratio shown in Table 2, and manufactured into a plain structure using a 14-gauge circular knitting machine. After knitting, it was dyed off-white by a conventional method to prepare a knitted fabric having a basis weight of 250 g / m 2.
実施例１で得られた繊維を３８ｍｍにカットし、表２記載の混率にて、２インチ紡により綿番手で３０／２の紡績糸となし、１４ゲージ丸編み機を用いて、天竺組織に製編したのち、常法によりオフホワイトで染色を行い目付２５０ｇ／ｍ２の編地を作製した。 (Examples 2 to 5)
The fiber obtained in Example 1 was cut into 38 mm, spun yarn with a cotton count of 30/2 by 2-inch spinning at the mixing ratio shown in Table 2, and manufactured into a plain structure using a 14-gauge circular knitting machine. After knitting, it was dyed off-white by a conventional method to prepare a knitted fabric having a basis weight of 250 g / m 2.
（比較例３及び４）
比較例１及び２で得られた繊維を３８ｍｍにカットし、表２記載の混率にて、２インチ紡により３０／２の紡績糸となし、１４ゲージ丸編み機を用いて、天竺組織に製編したのち、常法により黄色に染色を行い目付２５０ｇ／ｍ２の編地を作製した。
比較例３は、繊維に酸化チタンが含有されていないため、ＵＰＦ、紫外線遮蔽率は低いものであった。
また、比較例４は、酸化チタンが含有されているのもかかわらず、ＵＰＦ、紫外線遮蔽率は低いものであった。これは、繊維の断面形状が丸であることに起因するものと考えられる。 (Comparative Examples 3 and 4)
The fibers obtained in Comparative Examples 1 and 2 were cut into 38 mm, spun yarn of 30/2 by 2-inch spinning at the mixing ratio shown in Table 2, and knitted into a plain structure using a 14-gauge circular knitting machine. Then, it was dyed yellow by a conventional method to prepare a knitted fabric having a basis weight of 250 g / m 2.
In Comparative Example 3, since the fibers did not contain titanium oxide, the UPF and the ultraviolet shielding rate were low.
Further, in Comparative Example 4, despite the fact that titanium oxide was contained, the UPF and the ultraviolet shielding rate were low. It is considered that this is due to the fact that the cross-sectional shape of the fiber is round.
比較例１及び２で得られた繊維を３８ｍｍにカットし、表２記載の混率にて、２インチ紡により３０／２の紡績糸となし、１４ゲージ丸編み機を用いて、天竺組織に製編したのち、常法により黄色に染色を行い目付２５０ｇ／ｍ２の編地を作製した。
比較例３は、繊維に酸化チタンが含有されていないため、ＵＰＦ、紫外線遮蔽率は低いものであった。
また、比較例４は、酸化チタンが含有されているのもかかわらず、ＵＰＦ、紫外線遮蔽率は低いものであった。これは、繊維の断面形状が丸であることに起因するものと考えられる。 (Comparative Examples 3 and 4)
The fibers obtained in Comparative Examples 1 and 2 were cut into 38 mm, spun yarn of 30/2 by 2-inch spinning at the mixing ratio shown in Table 2, and knitted into a plain structure using a 14-gauge circular knitting machine. Then, it was dyed yellow by a conventional method to prepare a knitted fabric having a basis weight of 250 g / m 2.
In Comparative Example 3, since the fibers did not contain titanium oxide, the UPF and the ultraviolet shielding rate were low.
Further, in Comparative Example 4, despite the fact that titanium oxide was contained, the UPF and the ultraviolet shielding rate were low. It is considered that this is due to the fact that the cross-sectional shape of the fiber is round.
Claims (14)
- 酸化チタンの含有量が０．３質量％以上１．９質量％以下であり、断面形状が三角形であるアクリル繊維。 Acrylic fiber with a titanium oxide content of 0.3% by mass or more and 1.9% by mass or less and a triangular cross-sectional shape.
- 酸化チタンの含有量が０．５質量％以上１．８質量％以下である請求項１に記載のアクリル繊維。 The acrylic fiber according to claim 1, wherein the content of titanium oxide is 0.5% by mass or more and 1.8% by mass or less.
- 結節強度と結節伸度の積（Ｋ積）が１０以上３５以下である請求項１または２に記載のアクリル繊維。 The acrylic fiber according to claim 1 or 2, wherein the product (K product) of the knot strength and the knot elongation is 10 or more and 35 or less.
- アクリロニトリル単位９０質量％以上９８質量％以下とアクリロニトリル単位以外のビニル系モノマー単位２質量％以上１０質量％以下との２種のモノマー単位からなる請求項１～３のいずれか一項に記載のアクリル繊維。 The acrylic according to any one of claims 1 to 3, which comprises two types of monomer units, an acrylonitrile unit of 90% by mass or more and 98% by mass or less and a vinyl-based monomer unit other than the acrylonitrile unit of 2% by mass or more and 10% by mass or less. fiber.
- 単繊維繊度が０．６ｄｔｅｘ以上３．３ｄｔｅｘ以下である請求項１～４のいずれか一項に記載のアクリル繊維。 The acrylic fiber according to any one of claims 1 to 4, wherein the single fiber fineness is 0.6 dtex or more and 3.3 dtex or less.
- 単繊維の繊維長が２５ｍｍ以上１００ｍｍ以下である請求項１～５のいずれか一項に記載のアクリル繊維。 The acrylic fiber according to any one of claims 1 to 5, wherein the fiber length of the single fiber is 25 mm or more and 100 mm or less.
- 前記酸化チタンがアナターゼ型であり、一次粒子径が０．１μｍ以上１．０μｍ以下である請求項１～６のいずれか一項に記載のアクリル繊維。 The acrylic fiber according to any one of claims 1 to 6, wherein the titanium oxide is anatase type and the primary particle size is 0.1 μm or more and 1.0 μm or less.
- 請求項１～７のいずれか一項に記載のアクリル繊維の含有率が３０質量％以上である紡績糸であって、単糸、双糸または三子糸のいずれかであり、トータル番手が綿番手で１０番以上４０番以下である紡績糸。 The spun yarn having an acrylic fiber content of 30% by mass or more according to any one of claims 1 to 7, which is either a single yarn, a twin yarn or a triple yarn, and has a total count of cotton. A spun yarn with a count of 10 or more and 40 or less.
- 請求項１～７のいずれか一項に記載のアクリル繊維を４０質量％以上含有し、目付が５０ｇ／ｍ２以上５００ｇ／ｍ２以下であり、ＵＰＦが２５以上、紫外線遮蔽率が９０％以上である編地。 The acrylic fiber according to any one of claims 1 to 7 is contained in an amount of 40% by mass or more, the basis weight is 50 g / m 2 or more and 500 g / m 2 or less, the UPF is 25 or more, and the ultraviolet shielding rate is 90% or more. The knitted fabric that is.
- 請求項８に記載の紡績糸を８０質量％以上含有する編地。 A knitted fabric containing 80% by mass or more of the spun yarn according to claim 8.
- ＵＰＦが２５以上である請求項１０に記載の編地。 The knitted fabric according to claim 10, which has an UPF of 25 or more.
- 紫外線遮蔽率が９０％以上である請求項１０または１１に記載の編地。 The knitted fabric according to claim 10 or 11, wherein the ultraviolet shielding rate is 90% or more.
- 抗ピル性能が４級以上である請求項１０～１２のいずれか一項に記載の編地。 The knitted fabric according to any one of claims 10 to 12, which has an anti-pill performance of 4th grade or higher.
- Ｌ＊値が５０以上である請求項１０～１３のいずれか一項に記載の編地。
The knitted fabric according to any one of claims 10 to 13, wherein the L * value is 50 or more.
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