JP2015190073A - Knitted fabric, fiber product, and method for producing knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knitted fabric that exhibits excellent touch feeling, appropriate stretchability, quick drying property, air permeability and contact cooling sensation with a good balance in addition to cooling functionality that impedes transmission of UV rays and shields sunlight effectively.SOLUTION: There is provided a knitted fabric including polyester yarns, cellulosic spun yarns and polyurethane elastic yarns. The polyester yarn contains 1.0 to 5.0 mass% of titanium oxide and comprises modified cross-section polyester multifilaments having the degree of modified profile of 2.0 to 10.0 and has a total fineness of 56 to 110 dtex. The total yarn count of the cellulosic spun yarn is 70 to 120 yarn count, and the cellulosic spun yarn is smaller than the polyester yarn. The polyurethane elastic yarn has a total fineness of 16 to 33 dtex. The polyester yarn, the cellulosic spun yarn and polyurethane elastic yarn are knitted in a jersey stitch so that the knitted fabric comprises a layer that is mainly formed of the polyester yarn on one surface thereof and a layer that is mainly formed of the cellulosic spun yarn on the other surface thereof. The knitted fabric has a thickness of 0.1 to 0.6 mm.

Description

  In addition to a cooling function that efficiently blocks sunlight and blocks sunlight, the present invention has excellent texture, moderate stretchability, suppression of stuffiness due to moisture absorption, quick drying, breathability, and cool contact feeling. It relates to knitted fabrics that are well balanced. The present invention also relates to a textile product using the knitted fabric and a method for producing the knitted fabric.

  In recent years, with increasing awareness about health-oriented and comfort-oriented, targets for wearing functional wear are not limited to athletes performing hard sports, but have spread to a wide age group including middle-aged and elderly people. In addition, such functional wear is not only used for sports purposes but also for general casual use and inner wear.

  Under such circumstances, in environments where the environmental temperature is high, such as in summer, the temperature inside the garment is suppressed even when worn under direct sunlight, and an efficient cooling (cool feeling) effect is exerted to maintain a comfortable garment environment. Fiber products have been developed and proposed. As such a fiber product, for example, cool feeling containing a specific amount of a mixed fiber yarn including a modified cross-section polyester fiber having a degree of irregularity of 2.0 to 10.0 containing a specific amount of titanium oxide and a cellulose-based filament fiber. A fiber product or the like formed from a knitted fabric has been proposed (see, for example, Patent Document 1).

JP 2012-111405 A

  Although the cool sensation knitted fabric described in Patent Document 1 is excellent in cool sensation, since the knitted fabric uses a mixed yarn of polyester fiber and cellulose filament fiber, the polyester fiber is in direct contact with the skin. In terms of texture, it was not enough. In Patent Document 1, the stretchability has not been sufficiently studied.

  In recent years, more and more functions are required for functional wear. Specifically, for example, in addition to a cooling function that efficiently blocks sunlight by blocking the transmission of ultraviolet rays, it has an excellent texture and moderate expansion and contraction. Therefore, it is required that the functions such as suppression of stuffiness due to performance and moisture absorption performance, quick drying, breathability, and contact cooling sensation are combined in a well-balanced manner. However, like the knitted fabric described in Patent Document 1, many have been proposed that specialize in some of these functions, and there is no one that satisfies all of these functions yet.

  Therefore, the present invention is not a material specialized for a partial function such as exhibiting a cooling effect, but a comfortable knitted fabric in which clothing is comfortably maintained by a cooling effect and in consideration of a feeling of wearing as clothing. It is intended to provide. Specifically, the present invention has an excellent texture, moderate elasticity, suppression of stuffiness due to moisture absorption performance, quick drying, air permeability, in addition to a cooling function that efficiently blocks sunlight and blocks sunlight. An object of the present invention is to provide a knitted fabric having a well-balanced contact cooling feeling.

  The present inventors have intensively studied to achieve the above object, and found that the above object can be achieved by using the following knitted fabric, and have completed the present invention.

That is, the present invention is a knitted fabric including polyester yarn, cellulosic spun yarn, and polyurethane elastic yarn,
The polyester yarn contains 1.0 to 5.0% by mass of titanium oxide, is formed of a modified cross-section polyester filament having a modified degree of 2.0 to 10.0, and has a total fineness of 56 to 110 dtex. Polyester yarn,
The cellulosic spun yarn is a cellulosic spun yarn having a total count of 70 to 120 and thinner than the polyester yarn,
The polyurethane elastic yarn is a polyurethane elastic yarn having a total fineness of 16 to 33 dtex,
The polyester yarn, the knitted fabric has a layer mainly formed from the polyester yarn on one surface, and a layer mainly formed from the cellulosic spun yarn on the other surface, It is knitted in a tengu structure with cellulosic spun yarn and polyurethane elastic yarn,
The knitted fabric has a thickness of 0.1 to 0.6 mm.

  It is preferable that the knitted fabric is knitted with a three-layer bare tentacle structure by arranging the polyester yarn, the cellulose-based spun yarn, and the polyurethane elastic yarn in this order.

  The blend ratio of the polyester yarn, the cellulose-based spun yarn, and the polyurethane elastic yarn is 40 to 60% by mass of the polyester yarn, 30 to 50% by mass of the cellulose-based spun yarn, and 3 to 10% by mass of the polyurethane elastic yarn. preferable.

  The cellulose-based spun yarn is preferably made of lyocell fiber, and the fluff index of 5 mm or more is preferably 20/10 m or less.

  The present invention also relates to a textile product using the knitted fabric.

Furthermore, the present invention provides a polyester yarn having a total fineness of 56 to 110 dtex comprising a modified cross-section polyester filament containing 1.0 to 5.0% by mass of titanium oxide and having an irregularity of 2.0 to 10.0.
Cellulosic spun yarn having a total count of 70 to 120 and thinner than the polyester yarn, and
The present invention relates to a method for producing the knitted fabric, comprising a step of arranging polyurethane elastic yarns having a total fineness of 16 to 33 dtex in this order and knitting so as to form a tense structure.

  In addition to a cooling function that efficiently blocks sunlight and blocks sunlight, the present invention has excellent texture, moderate stretchability, suppression of stuffiness due to moisture absorption, quick drying, breathability, and cool contact feeling. A well-balanced knitted fabric can be provided. In addition to the above-described effects, the textile product (particularly clothing product) using the knitted fabric of the present invention also has a see-through preventing effect even when the knitted fabric becomes thin.

It is the schematic which shows an example (arrow type | mold) of the cross-sectional shape of the irregular cross-section polyester filament used in this invention. It is the schematic which shows an example (single arrow type) of the cross-sectional shape of the irregular cross-section polyester filament used in this invention. It is the schematic which shows an example (Y character type) of the cross-sectional shape of the irregular cross-section polyester filament used in this invention. It is the schematic which shows an example (four mountain flat type) of the cross-sectional shape of the irregular cross-section polyester filament used in this invention. It is the schematic which shows an example (dogbone type) of the cross-sectional shape of the irregular cross-section polyester filament used in this invention. It is the schematic which shows an example (I shape) of the cross-sectional shape of the irregular cross-section polyester filament used in this invention. It is the schematic which shows an example (W shape) of the cross-sectional shape of the irregular cross-section polyester filament used in this invention. It is the schematic which shows a bear tengu structure | tissue. It is an enlarged view of one loop of a bear tengu tissue.

1. Knitted fabric The knitted fabric of the present invention is a knitted fabric containing polyester yarn, cellulosic spun yarn, and polyurethane elastic yarn,
The polyester yarn contains 1.0 to 5.0% by mass of titanium oxide, is formed of a modified cross-section polyester filament having a modified degree of 2.0 to 10.0, and has a total fineness of 56 to 110 dtex. Polyester yarn,
The cellulosic spun yarn is a cellulosic spun yarn having a total count of 70 to 120 and thinner than the polyester yarn,
The polyurethane elastic yarn is a polyurethane elastic yarn having a total fineness of 16 to 33 dtex,
The polyester yarn, the knitted fabric has a layer mainly formed from the polyester yarn on one surface, and a layer mainly formed from the cellulosic spun yarn on the other surface, It is knitted in a tengu structure with cellulosic spun yarn and polyurethane elastic yarn,
The knitted fabric has a thickness of 0.1 to 0.6 mm.

(1) Polyester yarn The polyester yarn used in the present invention comprises a modified cross-section polyester filament containing 1.0 to 5.0% by mass of titanium oxide and having an irregularity of 2.0 to 10.0, and has a total fineness. May be 56 to 110 dtex.

  The irregular cross-section polyester filament is mainly composed of a polyester resin. Examples of the polyester resin include polyethylene terephthalate, polybutylene terephthalate, polyoxyethoxybenzoate, polyethylene naphthalate, polycyclohexanedimethylene terephthalate, and dicarboxylic acid components such as isophthalic acid and sulfoisophthalic acid as an additional portion of these polyesters. And polyesters obtained by copolymerizing diol components such as propylene glycol, butylene glycol, cyclohexane dimethanol, and diethylene glycol. Furthermore, examples of the polyester resin include aliphatic polyesters such as polycaprolactone, polybutylene succinate, and polylactic acid. Among these, polyethylene terephthalate is preferable from the viewpoint of dimensional stability. The “main component” means that 90% by mass or more of the polyester resin is contained in the irregular cross-section polyester filament.

  The irregularity degree of the irregular cross-section polyester filament used in the present invention is 2.0 to 10.0, and preferably 2.0 to 4.0. When the degree of profile is in the above range, moisture diffusibility and drying properties can be expressed. Here, the degree of irregularity of the irregularly shaped polyester filament is defined by a numerical value obtained by dividing the diameter of the circumscribed circle (7 in FIGS. 1 to 7) in the sectional shape by the diameter of the inscribed circle (6 in FIGS. 1 to 7). Is done.

  For example, a triangular cross section, a square cross section, a pentagon cross section, a flat cross section, a wedge cross section, a C-shaped cross section shaped like an alphabet, an H-shaped cross section, an I-shaped cross section, W For example, a letter-shaped cross section. Among these irregular cross-sectional shapes, the peripheral length of the filament is significantly longer than the cross-sectional area of the filament, the flat cross-section shown in FIGS. 1 to 6, the W-shaped cross-section shown in FIG. A cross section, an H-shaped cross section, an I-shaped cross section, and the like are preferable because the specific surface area of the filament is large and the moisture diffusibility is excellent. It is preferable that the moisture diffusibility is excellent because sweat treatment such as sweat absorption and sweat transfer is efficiently performed.

  The preferable shape of the irregular cross section in the present invention will be further described with reference to FIGS. A flat main part 1 having a long side and a short side in a modified cross section is a part that becomes a main part in the cross section of the filament. The convex part 2 in the modified cross section is connected to the basic part to form a convex shape. The cross-sectional shape of the filament shown in FIGS. 1 to 5 is based on the shape of an arrow (FIG. 1), a single arrow (FIG. 2), a Y (FIG. 3), and a four-sided flat (FIG. 4). The dogbone type (FIG. 5). 1 to 5, 3 indicates the long side of the backbone portion, 4 indicates the short side of the backbone portion, and 5 indicates the height of the convex portion. The height 5 of the convex portion refers to the distance between the highest portion of the portion protruding from the backbone portion of the fiber cross section and the backbone portion.

  Specifically, the fiber cross section shown in FIG. 1 is formed at one end of a flat main part 1 having a long side 3 and a short side 4 in a direction in which a pair of convex parts 2 and 2 protrude in opposite directions. The cross-sectional shape is an arrow shape. The fiber cross section shown in FIG. 2 is such that the convex portion 2 protrudes from one end of the basic portion 1 in the short side direction of the basic portion 1 from one end of the flat-shaped basic portion 1 having the long side 3 and the short side 4. The cross-sectional shape is a single arrow type. The fiber cross section shown in FIG. 3 has a pair of convex portions 2 and 2 formed so that one end of a flat-shaped basic portion 1 having a long side 3 and a short side 4 is divided into two forks. It is Y-shaped. The fiber cross section shown in FIG. 4 is in a plurality of positions along the long side direction of the flat-shaped main part 1 having the long side 3 and the short side 4, and in opposite directions along the short side direction of the main part 1. A pair of convex portions 2 and 2 are formed so as to protrude. The fiber cross section shown in FIG. 5 has a pair of convex portions at one end and the other end of the flat basic portion 1 having the long side 3 and the short side 4 so as to protrude in opposite directions along the short side direction. 2, 2 are formed.

Further, the flatness of the backbone in the modified cross section of the modified cross-section polyester filament used in the present invention is preferably 2.0 to 6.0, and more preferably 3.0 to 5.0. In addition, the flatness of the trunk portion in the irregular cross section is defined by the following formula.
Flatness = (length of the long side of the trunk) / (length of the short side of the trunk)

  By making the flatness of the backbone part within the above range, the strength of the obtained irregular cross-section polyester filament is improved, and the knitted fabric using the polyester yarn containing the filament is suppressed from becoming bulky, and the knitting There is a tendency that the thickness of the ground is in an appropriate range, which is preferable. Furthermore, the use of such a modified cross-section polyester filament is preferable because it tends to improve the ultraviolet shielding effect and moisture diffusion.

Moreover, it is preferable that it is 0.5-2.0, and, as for the ratio of the thickness of the convex part and backbone part of the irregular cross-section polyester filament used by this invention, it is 0.55-1.0. By setting the thickness ratio of the convex portion and the backbone portion to 0.5 to 2.0, the single fibers (filaments) do not completely overlap in the knitted fabric, and fine voids are formed between the single fibers. This is preferable because it tends to improve moisture diffusibility. By using such a modified cross-section polyester filament, there is a tendency that it is possible to obtain a comfortable knitted fabric that can fit the movement of the body without being thick, while maintaining good moisture diffusibility. Note that the ratio of the thickness of the convex portion to the backbone portion is the ratio of the height of the convex portion to the length of the short side of the backbone portion, and is defined by the following equation.
Thickness ratio between convex part and backbone part = (height of convex part) / (length of short side of backbone part)

  From the viewpoint of water absorption and diffusibility, the number of convex portions in the cross-section of the irregular cross-section polyester filament used in the present invention is preferably 2 to 10, and more preferably 2 to 8. The fiber cross section shown in FIG. 6 is an I-shape consisting of only a flat basic part 1 having a long side 3 and a short side 4, and the fiber cross section shown in FIG. Each of them is W-shaped, and is not formed with a protruding portion 2 that is connected to the base portion 1 and protrudes. However, the fiber cross sections shown in FIGS. 6 and 7 can sufficiently withstand actual use because the degree of deformation satisfies the above range.

  Moreover, it is preferable that the single yarn fineness of the irregular cross-section polyester filament used by this invention is 0.5-2.8 dtex, and it is more preferable that it is 1-2.5 dtex. When the single yarn fineness exceeds 2.8 dtex, the gap between the fibers (filaments) becomes large, so that the capillary phenomenon is hardly expressed and the moisture diffusibility tends to decrease. When the moisture diffusibility decreases, the wet state continues for a long time, and there is a tendency that comfort cannot be obtained when a fiber product such as innerwear is used. Furthermore, when the single yarn fineness exceeds 2.8 dtex, the fiber becomes so rigid that it tends to be difficult to obtain a soft feeling in the knitted fabric. On the other hand, when the single yarn fineness is less than 0.5 dtex, the strength of the single yarn is lowered, the single yarn is broken, and fluff tends to be generated. When fluff is generated, pilling or the like is likely to occur when washing is repeated. Furthermore, when the single yarn fineness is less than 0.5 dtex, the sucked water is accumulated between the fibers, and it becomes sticky and tends to inhibit quick drying.

  The irregular cross-section polyester filament used in the present invention contains 1.0 to 5.0 mass% of titanium oxide with respect to the mass of the polyester filament, preferably 2.0 to 5.0 mass%, It is more preferable to contain 2.0-4.0 mass%. By containing titanium oxide in the above range, it is possible to express the sheer when the knitted fabric is white, and in addition, the infrared region contained in sunlight is efficiently shielded, and cool feeling is exhibited. The effect that it can be obtained. When the content of titanium oxide is below the above range, the cooling function derived from the ultraviolet shielding effect and heat shielding property, the anti-slipping effect, etc. are not sufficiently exhibited, while when it exceeds the above range, spinnability and stretchability are improved. It will cause trouble.

  The particle size of the titanium oxide is not particularly limited, but is preferably in the range of 0.1 to 2.0 μm, and more preferably 0.3 to 1.0 μm.

  When the modified cross-section polyester filament has a core-sheath structure, titanium core may be contained only in the core part of the core-sheath structure, titanium oxide may be contained only in the sheath part, and the core part and Titanium oxide may be contained in both of the sheath portions.

  From the viewpoint of practicality, the strength of the irregular cross-section polyester filament used in the present invention is preferably 1 to 6 cN / dtex, and more preferably 1.5 to 4.5 cN / dtex.

  The polyester yarn used in the present invention is formed from the modified cross-section polyester filament, and may be an original yarn or a yarn subjected to a treatment such as false twisting.

  The total fineness of the polyester yarn used in the present invention is 56 to 110 dtex, and preferably 60 to 100 dtex. When the total fineness is less than 56 dtex, the cellulose-based spun yarn is exposed to the polyester yarn layer, and the exposed portion does not tend to exhibit a structure in which the cellulose-based spun yarn layer and the polyester yarn layer are laminated. Therefore, the effects of the present invention cannot be fully exhibited. On the other hand, if the total fineness of the polyester yarn exceeds 110 dtex, the thickness of the obtained knitted fabric will increase, making it unsuitable for thin clothing sites such as inner use. In addition, it is possible to reduce the thickness of the fabric by thinning the cellulosic spun yarn (the count exceeding 120), but in this case, the mixing rate of the cellulosic spun yarn is reduced, and it is derived from the cellulosic spun yarn. This is not preferable because the characteristics to be obtained are poor.

(2) Cellulose-based spun yarn The cellulosic spun yarn used in the present invention may have a total count of 70 to 120 and may be thinner than the polyester yarn.

  Examples of the cellulose-based spun yarn include natural fibers such as cotton and hemp, and regenerated cellulose fibers such as viscose rayon, copper ammonia rayon, and lyocell. Among these, regenerated cellulose fibers are preferable, rayon and lyocell excellent in hygroscopicity are more preferable, and lyocell is particularly preferable in consideration of physical properties such as maintenance of abrasion strength when wet. In addition, the cellulose-based spun yarn used in the present invention is more durable than natural fibers from the viewpoint of durability (even if it is repeatedly worn and washed, the initial soft texture can be maintained and it can have high moisture absorption / release properties). Those using regenerated cellulose fibers are preferred.

  The regenerated cellulose fiber is prepared, for example, by preparing pulp as a raw material, which is dissolved in N-methylmorpholine-N-oxide, dimethyl sulfoxide, N-methylpiperidine-N-oxide, dimethylacetamide, etc., and filtered. After removing impurities, the solution can be obtained by dry or wet spinning.

  In general, the regenerated cellulose fiber is likely to cause a phenomenon of fibrillation in which the fiber surface is cracked due to stagnation or the like in the dyeing or re-dying process and repeated stagnation after being manufactured. When the fibers are fibrillated, the texture of the knitted fabric is reduced, and the fluff of cellulosic spun yarn erupts on the surface of the knitted fabric, and the appearance of the fabric may be significantly impaired. is there. Therefore, when using regenerated cellulose fibers, it is preferable to use those subjected to antifibrillation treatment from the viewpoint of maintaining the texture and appearance.

  As a method for antifibrillation treatment of regenerated cellulose fibers at the raw cotton stage, for example, in an aqueous solution containing a compound having at least one of a chlorohydrin group and a glycidyl group, an alkaline compound, and a reaction accelerator comprising a neutral salt, The raw cotton (fiber lump) is charged and heated and stirred for a predetermined time. As an apparatus used for the anti-fibrillation treatment, a package dyeing machine generally used for pre-dyeing can be mentioned. As the treatment time, the treatment time may be optimized according to the amount of raw cotton input, the apparatus, the stirring speed, etc., but generally about 10 to 90 minutes are preferable. As processing temperature, 40 degreeC or more is preferable and 60-100 degreeC is more preferable.

  The single yarn fineness of the cellulose-based spun yarn is preferably 0.5 to 1.5 dtex. If the single yarn fineness is less than 0.5 dtex, it tends to be difficult to form fibers, and if it exceeds 1.5 dtex, it tends to be difficult to give soft texture to the knitted fabric.

  Moreover, the total count of the cellulose-based spun yarn is 70 to 120, and preferably 80 to 100. When the total yarn count is less than 70 and thicker, the texture and water absorption are improved, but the cellulose-based spun yarn tends to flicker on the polyester yarn layer surface. Cellulosic spun yarns and polyester yarns have different dyeing properties, so if the cellulose spun yarn is exposed on the surface of the polyester yarn layer, it tends to have a flickering surface feeling (irritated feeling) due to the color difference. is there. Furthermore, when the thickness is below 70, the blend ratio of the cellulose-based spun yarn inevitably increases. However, generally, the cellulose-based spun yarn is excellent in water absorption. However, when the blend ratio increases, water tends to be trapped. There is a tendency to inhibit dryness. On the other hand, if it becomes thinner than 120th, it is not preferable because the texture is not stretched, moisture is easily accumulated between fibers, water absorption is reduced, and contact coolness is reduced because the contact area is reduced. .

  The cellulose-based spun yarn used in the present invention needs to be thinner than the polyester yarn. If the cellulosic spun yarn is thicker than the polyester yarn, the cellulosic spun yarn is exposed on the surface of the polyester yarn layer, resulting in a feeling of irritation, and the appearance of the fabric is greatly impaired.

  The cross-sectional shape, surface shape, length, spinning conditions, and the like of the staple (monofilament) constituting the cellulose-based spun yarn are not particularly limited, and can be appropriately selected within the range normally used in this field. .

  The total count of the cellulose-based spun yarn used in the present invention is 70 to 120, and a relatively fine count yarn is used. However, the fine count yarn generally tends to break during knitting and easily generate fluff. It is in. For this reason, it is preferable to use a spun yarn having a high fiber density and a high density. Specifically, it is preferable to use a spun yarn having a fluff index of 5 mm or more and 20/10 m or less. By using such a spun yarn, yarn breakage and fluff are suppressed, process passability is improved, and contact cold sensibility tends to be improved by reducing fluff. Furthermore, even if it is repeatedly worn and washed, there is little fuzzing, and there is an effect of suppressing the appearance of the fluff erupting on the fabric surface and deteriorating the appearance. In addition, the measuring method of a fluff index can be performed by the method as described in an Example.

  As a method for setting the fluff index within the above range, for example, it can be performed by increasing the accumulation degree of the fiber bundle. Examples of the method for increasing the degree of accumulation of fiber bundles include a method of introducing a compact spinning system during ring spinning, a method of spinning based on a bundle spinning method, and the like.

  The compact spinning system is a means for suppressing fluff by improving the uniformity of the fiber bundle achieved by the air suction type focusing mechanism and improving the fiber convergence property. It is installed between the draft area and the twisted area. By introducing a compact spinning system, the spun yarn becomes dense with less fluff, and as a result, improvement in strength and elongation can be expected. It is also effective for improving the contact cooling sensation of the knitted fabric. The air suction type focusing mechanism includes a perforated apron system and a perforated drum system, and any system can be employed in the present invention.

  On the other hand, the bundling spinning method is a spinning method that uses the swirling action of airflow. Specifically, the short fibers are twisted in a spiral shape by a swirling flow of air, and one end of the single fiber is spun so as to be twisted near the center of the cross section of the spun yarn. Thereby, the fluff which appears on the surface can be decreased. As described above, there is Murata-Vortex-Spinner (MVS, manufactured by Murata Machinery Co., Ltd.) as a device that uses the turning force generated by the high-speed air flow ejected from the spinning nozzle.

  By reducing the fluff of the spun yarn, an anti-pilling property can be imparted to the knitted fabric as a secondary effect. In general, when a thin yarn is produced based on the bundling spinning method, it is difficult to obtain a yarn having excellent uniformity. Therefore, in the present invention, it is preferable to produce a yarn based on the ring spinning method in which a compact spinning system is introduced.

(3) Polyurethane elastic yarn The polyurethane elastic yarn used in the present invention only needs to have a total fineness of 16 to 33 dtex.

  The total fineness of the polyurethane elastic yarn is 16 to 33 dtex, and preferably 18 to 25 dtex. If the total fineness is less than 16 dtex, the knitted fabric lacks stretch recovery. Conversely, if the total fineness exceeds 33 dtex, it becomes easy to form a tight fabric due to the elastic force of the polyurethane elastic yarn, resulting in high density and thickening. For this reason, the soft texture is reduced.

  In the present invention, the polyurethane elastic yarn is preferably a bare yarn.

(4) Knitted fabric structure and characteristics The knitted fabric of the present invention has a layer mainly formed from the polyester yarn on one surface and a layer mainly formed from the cellulosic spun yarn on the other surface. It is characterized by having been organized with a tengu tissue. Here, “mainly” means that the ratio is the highest among the components constituting the layer, and the layer mainly formed from the polyester yarn is substantially composed of the polyester yarn. The layer mainly formed from the cellulose-based spun yarn is substantially composed of the cellulose-based spun yarn.

  Since the knitted fabric of the present invention includes polyester yarns, cellulosic spun yarns, and polyurethane elastic yarns, a layer formed from polyester yarns and a layer formed from cellulosic spun yarns are not included in the knitted fabric. Furthermore, a layer formed of polyurethane elastic yarn is also formed. The layer formed from the polyurethane elastic yarn may be arranged in any layer from the inner surface layer to the outer surface layer in the tissue, and is not limited at all. The polyurethane elastic yarn used in the present invention is very thin compared to polyester yarns and cellulosic spun yarns. For this reason, even if the layer formed from the polyurethane elastic yarn is arranged on the surface layer, it does not cover the adjacent layer, and the adjacent layer is substantially exposed to the surface layer. Become.

  FIG. 8 is a schematic view of a tengu tissue. FIG. 9 is an enlarged schematic view of a loop of a three-layer bare tentacle structure that is preferably employed in the present invention, and represents a structure chart at the time of knitting. In the three-layer bare tengu structure shown in FIG. 9, the yarn supply conditions of the three yarns are adjusted so that the polyester yarn 8, the cellulose-based spun yarn 9, and the polyurethane elastic yarn 10 overlap in this order in the structure. It is formed by knitting tengu while.

  In the structure shown in FIG. 9, the polyurethane elastic yarn is arranged on the innermost side in the loop at the time of knitting. At that time (knitting), the layer made of the polyurethane elastic yarn is also arranged on the innermost side of the knitted fabric. . However, the polyurethane elastic yarn undergoes elastic shrinkage when the tension is relaxed after knitting, and most of the yarn is also sunk into the layer made of cellulosic spun yarn. Then, even when knitting as shown in FIG. 9, the layer made of polyurethane elastic yarn is mostly embedded in the layer made of cellulosic spun yarn. A layer made of the spun yarn is substantially arranged.

  Therefore, as described above, the knitted fabric of the present invention has a single-bearing tentacle structure (three-layer bare tentacle structure) having a polyester layer, a cellulose-based spun yarn, and a polyurethane elastic yarn in this order and having a substantially three-layer structure. ). That is, the knitted fabric of the present invention is preferably obtained by knitting with such a structure. By adopting this order, troubles during knitting can be reduced, and the feeling of irritation can be suppressed and various performances can be given to the knitted fabric in a well-balanced manner.

  In the present invention, by using a polyester yarn, UV shielding, heat shielding, prevention of see-through, quick-drying, etc. can be imparted, and by using a cellulose-based spun yarn, excellent texture, water absorption, moisture absorption, contact cooling sensitivity By using a polyurethane elastic yarn, an appropriate stretch property can be imparted so that the thickness of the knitted fabric does not become thick. In addition, the knitted fabric adopting the double knit structure is too thick, so that the effect of the present invention cannot be achieved, but in the present invention, the single layered three-layer bare tentacle structure is adopted. The fabric thickness can be reduced. In other words, the knitted fabric of the present invention is one of the major features of using these three specific types of yarns to form a bare tentacle structure.

  Thus, the knitted fabric of the present invention is mainly formed from the polyester yarn on one surface by setting the thickness of the irregular cross-section polyester filament, cellulosic spun yarn, and polyurethane elastic yarn to a specific range. It has a layer and is formed so as to have a layer mainly formed from the cellulose-based spun yarn on the other surface. More specifically, the knitted fabric of the present invention has a layer formed from a polyester yarn on one knitted fabric surface, and a layer formed from cellulosic spun yarn on the other knitted fabric surface, A knitted fabric formed from a three-layer bare tentacle structure having a three-layer structure in which layers formed from polyurethane elastic yarns are arranged at arbitrary positions. If the balance of the thickness of the three types of yarn is lost, the structure as described above cannot be maintained. As a result, UV shielding, excellent texture, moderate stretchability, suppression of stuffiness due to moisture absorption, quick drying, It becomes difficult to obtain a knitted fabric having a good balance between air permeability and contact cooling. In addition, the layer formed from the polyester yarn of the knitted fabric may be used as the outer surface layer (side not touching the skin), and the layer formed from the cellulose-based spun yarn may be used as the inner surface layer (skin side). Since the effect of the knitted fabric of the present invention can be expressed to the maximum, it is preferable.

  The knitted fabric of the present invention preferably contains 60 parts by mass or more, more preferably 80 parts by mass or more of the polyester yarn, cellulose spun yarn, and polyurethane elastic yarn with respect to 100 parts by mass of the knitted fabric. More preferably, it contains 100 parts by mass (that is, the knitted fabric is composed only of polyester yarn, cellulose spun yarn, polyurethane elastic yarn).

  In addition, the yarns that can be used other than the polyester yarn, cellulose spun yarn, and polyurethane elastic yarn include animal fibers such as wool, mohair, silk, semi-synthetic fibers such as triacetate and diacetate, acrylic, nylon, vinylon, Examples thereof include synthetic fibers such as polypropylene and polyethylene.

  The total mixing ratio of the polyester yarn, cellulose spun yarn, and polyurethane elastic yarn is 40-60 mass% for polyester yarn, 30-50 mass% for cellulose spun yarn, and 3-10 mass for polyurethane elastic yarn. % Is preferred. By setting it as such a mixture rate, there exists a tendency which can exhibit the effect of this invention with sufficient balance, and it is preferable.

  The thickness of the knitted fabric is 0.1 to 0.6 mm, and preferably 0.4 to 0.6 mm. If the thickness of the knitted fabric is less than 0.1 mm, the fabric becomes too thin and a sufficient ultraviolet ray shielding effect cannot be obtained. On the other hand, if it exceeds 0.6 mm, the obtained product becomes heavy, resulting in increased ventilation resistance and a feeling of lightness as a product.

The basis weight of the knitted fabric is preferably 130 to 170 g / m ² . If it is less than 130 g / m ² , the fabric becomes too thin, and there is a tendency that sufficient infrared and ultraviolet shielding effects cannot be obtained. On the other hand, when the basis weight exceeds 170 g / m ² , the obtained product becomes heavier, and there is a tendency to increase the airflow resistance and to feel the product as lightweight.

  In the present invention, the ultraviolet shielding rate of the knitted fabric can be 90% or more. The irregular cross-section polyester filament used in the present invention contains 1.0 to 5.0 mass% of titanium oxide and has a degree of irregularity of 2.0 to 10.0. Therefore, the filament is arranged on the surface of the knitted fabric. Thus, the single fibers do not completely overlap and form fine voids between the single fibers. As a result, the refraction of the transmitted light increases, and the ultraviolet shielding effect can be increased synergistically. A shielding rate can be achieved.

In the present invention, the knitted fabric at 20 ° C. and 60% R.D. H. The contact cooling sensation (Qmax) in the environment can be 0.2 W / m ² or more. If the contact cooling sensation is less than 0.2 W / m ² , it is difficult to experience the cooling sensation when worn.

  The contact cooling sensation can be expressed by using a fiber having a large contact area with the skin and holding moisture on the fiber surface (highly hygroscopic). This is because it feels “cold” due to the movement of heat, so that it sticks to the skin and absorbs moisture efficiently, and the heat moves along with the movement of moisture to feel “cold”. That is, in the knitted fabric of the present invention, as described above, since the layer made of cellulose-based spun yarn having high hygroscopicity is arranged on the inner surface (that is, the side in contact with the skin), a high feeling of cold contact can be expressed. It can be done. Moreover, since the knitted fabric employs a tentacle structure having a high flatness on the surface of the knitted fabric, the contact area can be increased and high contact cooling sensation can be expressed.

  In the present invention, the airflow resistance value of the knitted fabric can be set to 0.25 kPa · s / m or less. A breathable element is indispensable for obtaining a comfortable clothing environment, and if the ventilation resistance value is 0.25 kPa · s / m or less, the ventilation function in the clothing can be efficiently performed.

  The ventilation resistance value is related not only to the density but also to the combination of the yarn count and the thickness of the knitted fabric. By setting it as the structure of the knitted fabric of this invention, the said ventilation resistance value can be achieved.

  In the present invention, the time until the diffusible residual moisture content of the knitted fabric reaches 10% (drying speed) can be 65 minutes or less.

  In the present invention, the hygroscopicity of the knitted fabric can be 3.0% or more. When the hygroscopicity is less than 3.0%, the effect of suppressing the stuffiness before perspiration is reduced, resulting in unpleasant comfort. In the knitted fabric of the present invention, the layer made of cellulose-based spun yarn on the inner surface absorbs water, and water can move to the knitted fabric surface. The moved water can be quickly diffused on the surface of the knitted fabric due to the capillary action of the deformed polyester filament, and the evaporation is promoted by the diffusion to realize a smooth skin texture. In addition, since the knitted fabric of the present invention is very thin, 0.1 to 0.6 mm, it is a factor that can achieve the above-described hygroscopicity because it is difficult to store water in the first place.

  In the present invention, the stretch recovery rate of the knitted fabric can be 85% or more. Since the knitted fabric of the present invention has a layer formed of polyurethane elastic yarn, the stretch recovery rate can be achieved. With an elongation recovery rate of 85% or more, the fabric itself can follow the movement when attaching and detaching or wearing, and can have a moderate fit after extension, for example, as ladies' innerwear, etc. Can also be suitably used.

  The characteristics of the knitted fabric described above can be measured by the method described in Examples.

  The number of courses C and the number of wales 1 inch between the knitted fabrics of the present invention are not particularly limited and can be appropriately set according to the purpose. For example, the number of courses C is preferably 60 ± 8 / inch, and more preferably 60 ± 3 / inch. Further, the number of wales W is preferably 40 ± 5 / inch, and more preferably 40 ± 3 / inch.

2. Method for producing knitted fabric The method for producing the knitted fabric of the present invention includes a step of preparing the polyester yarn, the cellulose-based spun yarn, and the polyurethane elastic yarn, and knitting to form a three-layer bare tentacle structure. Can be manufactured.

  Further, the knitted fabric of the present invention can be obtained by knitting to obtain a living machine, and then scouring, relaxing, and final setting the knitted fabric. During or after the series of post-processing, the knitted fabric is bleached, dyed, alkali-reduced, colored, embossed, water-repellent, antibacterial, phosphorescent, deodorized, etc. based on known knowledge be able to. In general, it is preferable to dye after relaxing.

3. Textile Products The knitted fabric of the present invention can be applied to all types of textile products that require cool sensibility, such as various innerwear, T-shirts, and futon side fabrics.

  As described above, in the knitted fabric of the present invention, the layer formed from the polyester yarn is the outer surface layer (side not touching the skin), and the layer formed from the cellulosic spun yarn is the inner surface layer (skin side). By using it, the effects of the present invention (particularly, the ultraviolet shielding effect, contact cooling sensation, heat shielding property, texture, etc.) can be exhibited to the maximum extent.

  Examples of the inner wear include, but are not limited to, various inner wear such as an inner T-shirt, camisole, slip, underwear, and stomach wrap.

  EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. In addition, the irregularity degree of the polyester filament used by the Example and the comparative example, the flatness of a base part, the thickness ratio of a convex part and a base part, and the fluff index of the cellulosic fiber were measured with the following method.

<Deformation degree of polyester filament>
Using a transmission microscope (“BH-2 UMA”, manufactured by Olympus Corporation), the diameters of the inscribed circle and circumscribed circle in the irregular cross section of the polyester filament were measured, and the degree of irregularity was calculated using the following formula.
Deformity = (diameter of circumscribed circle) / (diameter of inscribed circle)

<Category flatness>
Using a transmission microscope (“BH-2 UMA”, manufactured by Olympus Corporation), the length of the long side and the length of the short side of the cross section of the polyester filament are measured, and the flatness is calculated using the following formula: Was calculated. In addition, flatness was made into the average value of arbitrary 10 points | pieces.
Flatness = (length of the long side of the trunk) / (length of the short side of the trunk)

<Thickness ratio between convex part and backbone part>
Using a transmission microscope (“BH-2 UMA”, manufactured by Olympus Corporation), the height of the convex part of the cross section of the polyester filament and the length of the short side of the backbone part are measured, The thickness ratio between the head and the backbone was calculated. The ratio was an average value of arbitrary 10 points.
Thickness ratio between convex part and backbone part = (height of convex part) / (length of short side of backbone part)

<Fuzzy index of cellulose-based spun yarn>
It measured based on JIS L1095 9.22.2B method. Specifically, a parallel light beam in one direction is applied to the cellulosic spun yarn, and an image of fluff is projected on a shielding plate installed on the side opposite to the light source when viewed from the cellulosic spun yarn. The number of fluff corresponds to the fluff index. For measurement, an F-INDEX tester (manufactured by Shikibo Co., Ltd.) was used 30 times with a sample length of 10 m, and the average value was taken as the fluff index.

Example 1
(Manufacture of cellulose-based spun yarn)
Micro lyocell monofilaments having a monofilament fineness of 0.9 dtex and an average fiber length of 34 mm were sequentially added to the blended cotton, card, kneading and roving processes to obtain a roving of 40 gelen / 30 yards. Next, the two rovings obtained above were put into a compact spinning machine manufactured by Toyota Industries Corporation (a ring spinning machine incorporating a compact spinning system) in which a fiber bundle focusing device was provided. The position of the trumpet was adjusted so that the distance between the yarn paths was 8 mm, a total draft of 32 times was applied, and the two rovings were each made into a fiber bundle. Subsequently, the fiber bundle was supplied to the fiber bundle converging device at an interval of 7 mm without being wound up, and converged by applying a suction action from the suction portion via a ventilation apron rotating between the rotating roller and the auxiliary roller. After converging, it is niped at a nip point interval of 4 mm without being wound and fed downstream, twisted at a twisting factor of 3.6, and wound up as 100-twisted spun-twisted spun yarn 100 to obtain a cellulose-based spun yarn It was. The fluff index of 5 mm or more of the obtained cellulose-based spun yarn was 10/10 m.

(Production of knitted fabric)
As a yarn constituting the knitted fabric, an irregular cross-section polyester terephthalate (PET) filament having a cross-sectional shape as shown in FIG. 1 (deformation degree: 2.3, flatness: 3.0, convex portion and backbone portion Thickness ratio: 0.8, polyester yarn (84 dtex / 48f) made of titanium oxide (average particle size: 0.5 μm content: 2% by mass), cellulose-based spun yarn obtained above, polyurethane elasticity A yarn (total fineness: 22 dtex, trade name: Roika C805, manufactured by Asahi Kasei Fibers Co., Ltd.) was prepared.

  Polyester yarn, cellulosic spun yarn and polyurethane elastic yarn were introduced into a special circular knitting machine (hook diameter: 38 inches, needle density: 28G, number of needles: 3312, manufactured by Fukuhara Seiki Seisakusho Co., Ltd.). The knitted fabric was knitted with a three-layer bare tengu structure while arranging the yarns as described in. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer substantially made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Next, the resulting knitted fabric was pre-set at 190 ° C. with a raw machine, scoured at 80 ° C. for 30 minutes, whitened by bleaching, and finally finished, and the total blend ratio (polyester yarn / cellulose-based spun yarn) / Polyurethane elastic yarn) was 55/40/5 (mass%), the basis weight was 155 g / m ² , the number of courses was C60 / inch, and the number of wales was W40 / inch.

Example 2
(Manufacture of cellulose-based spun yarn)
Micro lyocell monofilaments having a monofilament fineness of 0.9 dtex and an average fiber length of 34 mm were sequentially introduced into the blended cotton, card, kneading and roving processes to obtain 50 yarn / 30 yard roving yarn. Next, the two rovings obtained above were put into a compact spinning machine manufactured by Toyota Industries Corporation (a ring spinning machine incorporating a compact spinning system) in which a fiber bundle focusing device was provided. The position of the trumpet was adjusted so that the distance between the yarn paths was 8 mm, a total draft of 32 times was applied, and the two rovings were each made into a fiber bundle. Subsequently, the fiber bundle was supplied to the fiber bundle converging device at an interval of 7 mm without being wound up, and converged by applying a suction action from the suction portion via a ventilation apron rotating between the rotating roller and the auxiliary roller. After converging, it is niped at a nip point interval of 4 mm without being wound up, sent downstream, twisted at a twisting factor of 3.6, and wound up as a fine spinning spun twisted yarn of No. 160 twin yarn to obtain a cellulose-based spun yarn It was. The fluff index of 5 mm or more of the obtained cellulose-based spun yarn was 10/10 m.

(Production of knitted fabric)
In Example 1 (preparation of knitted fabric), the total blend ratio (polyester yarn / cellulosic spun yarn / polyurethane elastic yarn) was 50/45 in the same manner as in Example 1 except that the above-mentioned cellulosic spun yarn was used. / 5 (% by mass), a fabric weight of 170 g / m ² , a course number C58 / inch, and a wales number W40 / inch were obtained. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer substantially made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Example 3
(Manufacture of cellulose-based spun yarn)
Cotton single fibers having an average single fiber fineness of 1.3 dtex and an average fiber length of 38 mm were sequentially added to the blended cotton, card, kneading and roving processes to obtain a 40-yelenes / 30-yard roving. Next, the two rovings obtained above were put into a compact spinning machine manufactured by Toyota Industries Corporation (a ring spinning machine incorporating a compact spinning system) in which a fiber bundle focusing device was provided. The position of the trumpet was adjusted so that the distance between the yarn paths was 8 mm, a total draft of 32 times was applied, and the two rovings were each made into a fiber bundle. Subsequently, the fiber bundle was supplied to the fiber bundle converging device at an interval of 7 mm without being wound up, and converged by applying a suction action from the suction portion via a ventilation apron rotating between the rotating roller and the auxiliary roller. After converging, it is niped at a nip point interval of 4 mm without being wound and fed downstream, twisted at a twisting factor of 3.6, and wound up as 100-twisted spun-twisted spun yarn 100 to obtain a cellulose-based spun yarn It was. The fluff index of 5 mm or more of the obtained cellulose-based spun yarn was 13/10 m.

(Production of knitted fabric)
In Example 1 (preparation of knitted fabric), the total blend ratio (polyester yarn / cellulose-based spun yarn / polyurethane elastic yarn) was 55/40 in the same manner as in Example 1 except that the above-mentioned cellulosic spun yarn was used. / 5 (% by mass), a basis weight of 160 g / m ² , a knitted fabric having a course number of C60 / inch and a wale number of W40 / inch was obtained. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer substantially made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Examples 4-6
In Example 1 (preparation of knitted fabric), the total blending ratio described in Table 1 is the same as in Example 1 except that the total fineness of the polyester yarn or the fineness of the polyurethane elastic yarn is changed as shown in Table 1. A knitted fabric having thickness, basis weight and density was obtained. The layer structure of the obtained knitted fabric was the same as that in Example 1.

Comparative Example 1
In Example 1 (production of knitted fabric), as a polyester yarn, a round cross-section polyester processed yarn (84 dtex / 36f), and as a cellulose-based spun yarn, a single fiber fineness of 0.9 dtex and an average fiber length of 34 mm, a micro lyocell single fiber The micro lyocell 100/1 (100 count single unit) produced in an ordinary ring spinning machine was prepared by sequentially feeding the yarn into the blended cotton, card, kneading and roving processes. The total mixing ratio (polyester yarn / cellulosic spun yarn / polyurethane elastic yarn) was 55/40/5 (mass) in the same manner as in Example 1 except that the yarn had a fluff index of 5 mm or more: 40 pieces / 10 m). %), A knitted fabric having a basis weight of 155 g / m ² , a course number of C60 / inch, and a wale number of W40 / inch was obtained. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer substantially made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Comparative Example 2
In Example 1 (production of knitted fabric), a round cross-section polyester processed yarn (167 dtex / 48f) was used as the polyester yarn, and a lyocell single fiber having a single fiber fineness of 1.3 dtex and an average fiber length of 38 mm was used as the cellulose-based spun yarn. , Lyocell 60/1 (60th single yarn, produced by a normal ring spinning machine), prepared by blending cotton, card, kneading and roving, and preparing 120 gelen / 30 yards of roving. The total mixing ratio (polyester yarn / cellulosic spun yarn / polyurethane elastic yarn) was 61/36/3 (mass%) in the same manner as in Example 1 except that a fluff index of 5 mm or more was used (45 pieces / 10 m). A knitted fabric having a basis weight of 185 g / m ² , a course number of C54 / inch, and a wale number of W38 / inch was obtained. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer substantially made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Comparative Example 3
In Example 1 (preparation of knitted fabric), a round cross-section polyester processed yarn (44 dtex / 36f) as a polyester yarn, and a micro lyocell 140/1 (140th single yarn, a fluff index of 5 mm or more as a cellulose-based spun yarn) : 30 pieces / 10 m), the total mixing ratio (polyester yarn / cellulose-based spun yarn / polyurethane elastic yarn) was 47/45/8 (mass%), and the basis weight was 120 g / m. A knitted fabric having a m ² , a course number of C65 / inch, and a wale number of W40 / inch was obtained. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer substantially made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Comparative Example 4
The overall blend ratio (polyester yarn / cellulosic spun yarn) was the same as in Example 1, except that the polyester yarn (84 dtex / 48f) and the cellulosic spun yarn used in Example 1 were used to form a reversible tentacle structure. ) Was 58/42 (mass%), the basis weight was 125 g / m ² , the number of courses was C50 / inch, and the number of wales was W38 / inch. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer).

Comparative Example 5
As the yarn constituting the knitted fabric, the polyester yarn (84 dtex / 48f) used in Example 1 was arranged on the outer surface layer of the knitted fabric, and the cellulose-based spun yarn used in Example 1 was arranged on the inner surface layer. Example 1 with the exception that the raw elastic body knitted with a bear tuck reversible (double knit structure) knitted with the polyurethane elastic yarn used in 1 (22 dtex, trade name: Leuka C805, manufactured by Asahi Kasei Fibers Co., Ltd.) is also used. Similarly, the total mixing ratio (polyester yarn / cellulose-based spun yarn / polyurethane elastic yarn) is 50/40/10 (mass%), the basis weight is 200 g / m ² , the course number is C64 / inch, and the wale number is W42 / inch. I got a knitted fabric. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Comparative Example 6
Implemented except for using a polyester yarn (84 dtex / 48f) and cellulosic spun yarn used in Example 1 as yarns constituting the knitted fabric, and making the raw machine knitted in a tuck reversible (double knit structure). In the same manner as in Example 1, a knitted fabric having an overall mixing ratio (polyester yarn / cellulosic spun yarn) of 60/40 (mass%), a basis weight of 140 g / m ² , a course number of C52 / inch, and a wale number of W36 / inch. Obtained. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer).

Comparative Example 7
As the yarn constituting the knitted fabric, the yarn was knitted with a bare yarn structure made of the polyester yarn (84 dtex / 48f) used in Example 1 and a polyurethane elastic yarn (22 dtex, trade name: Leuka C805, manufactured by Asahi Kasei Fibers Co., Ltd.). Except for making the raw machine, the same as in Example 1, the total mixing ratio (polyester yarn / polyurethane elastic yarn) 91/9 (mass%), the basis weight is 120 g / m ² , the number of courses C64 / inch, the number of wales W40 An inch knitted fabric was obtained. In the obtained knitted fabric, most of the layer made of polyurethane elastic yarn was embedded in the layer made of polyester yarn.

Comparative Example 8
In Example 1 (production of knitted fabric), as a polyester yarn, the cross-sectional shape is an arrow-shaped irregular cross-section polyester filament as shown in FIG. 1 (degree of irregularity: 2.3, flatness: 3.0, convex portion Except that a polyester yarn (84 dtex / 48f) made of a thickness ratio of 0.8 to the main part: 0.8, titanium oxide content: 0.5% by mass) is used, A knitted fabric having a polyester yarn / cellulose-based spun yarn / polyurethane elastic yarn) of 55/40/5 (mass%), a basis weight of 155 g / m ² , a course number of C60 / inch, and a wale number of W40 / inch was obtained. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Comparative Example 9
The total blending ratio (polyester yarn / cellulosic spinning) was the same as in Example 1 except that polyurethane elastic yarn (total fineness: 44 dtex, trade name: Leuka C805, manufactured by Asahi Kasei Fibers) was used as the polyurethane elastic yarn. A knitted fabric having a yarn / polyurethane elastic yarn) of 53/37/10 (mass%), a basis weight of 190 g / m ² , a course number of C62 / inch, and a wale number of W42 / inch was obtained. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer made of cellulosic spun yarn was arranged on the inner surface layer (skin side layer). Although a layer made of polyurethane elastic yarn was partly disposed on a layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Comparative Example 10
In Example 1 (preparation of knitted fabric), as a polyester yarn, a polyester processed yarn (56 dtex / 48f), and as a cellulose-based spun yarn, a micro lyocell 80/1 produced by a normal ring spinning machine (80th single yarn) The total mixing ratio (polyester yarn / cellulosic spun yarn / polyurethane elastic yarn) was 40/53/7 (mass%) in the same manner as in Example 1 except that a fluff index of 5 mm or more was used. ), A knitted fabric having a basis weight of 160 g / m ² , a course number of C59 / inch, and a wale number of W40 / inch. In the obtained knitted fabric, a layer made of polyester yarn was arranged on the outer surface layer, and a layer made of cellulose-based spun yarn was arranged on the inner surface layer (skin side layer). Since the spun yarn was thicker, the cellulosic spun yarn appeared to flicker on the surface of the outer surface layer made of polyester yarn. In addition, although the layer made of polyurethane elastic yarn was partly disposed on the layer made of cellulosic spun yarn, most of it was embedded in the layer made of cellulosic spun yarn.

Table 1 shows the knitted fabrics obtained in Examples and Comparative Examples.

  The knitted fabrics obtained in Examples and Comparative Examples were evaluated by the following methods. The evaluation results are shown in Table 2.

<UV shielding rate>
In the measurement wavelength region of 280 to 400 nm, the transmittance (%) of ultraviolet rays irradiated to the test piece was measured using a spectrophotometer, and the shielding rate (%) was calculated according to the following formula.
Shielding rate (%) = 100-transmittance (%)

<Contact cooling sensation>
Using a KES-F7 Thermolab II tester manufactured by Kato Tech Co., Ltd., the sensor was placed on the hot plate, the temperature difference from the sample (ΔT: 20 ° C.) was made constant, and then the sensor was brought into contact with the test piece. The amount of instantaneous heat transfer (Q-max (W / cm ² )) was measured.

<Ventilation resistance value (KPa · sec / m)>
Using a KES-F8 air permeability tester manufactured by Kato Tech Co., Ltd., a constant flow rate air is sent to the sample by the piston movement of the cylinder, and the sample is discharged and sucked into the atmosphere. The loss was measured using a semiconductor differential pressure gauge.

<Diffusion residual moisture content>
On the glass plate placed on the balance, 0.6 g of distilled water was dropped at the center. After placing the sample so that the moisture was in contact with the inner surface (skin side) of the measurement sample cut to 10 cm × 10 cm, the mass change was measured, and the time until the residual moisture content reached 10% was measured.

<Hygroscopicity>
For the measurement sample, after weighing the completely dry mass W1, the measurement sample was 20 ° C., 65% R.D. H. The sample mass W2 after being allowed to stand for 24 hours in this environment was measured, and the moisture absorption rate was determined by the following formula.
Moisture absorption (%) = {(W2−W1) / W1} × 100

<Elongation recovery rate>
JIS L1096B-1 method (constant load method) adjusts three test pieces each having a width of 50 cm and a length of 300 mm in the vertical direction and the transverse direction. (L0) was marked and a load of 14.7 N was applied. The length (L1) between the marks after holding for 1 hour was measured. The load was removed, the initial load was applied after 1 hour, the length between the marks (L2) was measured, and the elongation recovery rate (%) was determined by the following formula.
Elongation recovery rate (%) = {(L1-L2) / (L1-L0)} × 100

<Thermal insulation (Kaken method)>
Hold the inner surface (skin side) of the measurement sample about 5 mm above the black drawing paper, and measure the temperature at the center of the drawing paper with a thermocouple over time by irradiating lamp light from the sample side. did. The test was performed three times at different positions, and the average value of the data was taken as the test result. Moreover, comparative evaluation with respect to the result of Comparative Example 1 was performed.
(Measurement condition)
Lamp used: Eye lamp <Spot> PRS100V500W, manufactured by Iwasaki Electric Co., Ltd. Irradiation distance: 50 cm
Irradiation time: 15 minutes

<Skin texture>
The skin surface (inner surface layer) of the obtained knitted fabric was evaluated in the following three stages by sensory evaluation by handling.
○: Good (excellent soft feeling)
Δ: Slightly poor (although soft, but slightly paper-like texture remains)
X: Defect (paper-like texture lacking softness)

  As is clear from Table 2, the knitted fabric of the present invention has not only a cooling function that efficiently blocks sunlight and shields sunlight, but also has an excellent texture and appropriate stretchability, quick drying, breathability, and contact. It has a cold feeling and is an optimal knitted fabric for comfortable inner T-shirt materials.

  On the other hand, the knitted fabric of Comparative Example 1 was inferior in water absorption and quick drying. The knitted fabric of Comparative Example 2 was thick and unsuitable for uses such as inner T-shirts, and was inferior in water absorption and quick drying. The knitted fabric of Comparative Example 3 had a result that the fabric was too thin and inferior in the ultraviolet shielding rate and contact cooling sensitivity. The knitted fabric of Comparative Example 4 was too thin, resulting in inferior UV shielding rate, contact cooling, and elongation recovery rate. The knitted fabric of Comparative Example 5 was too thick, resulting in inferior ventilation resistance and water-absorbing quick drying. The knitted fabric of Comparative Example 6 was inferior in ultraviolet shielding rate and elongation recovery rate. The knitted fabric of Comparative Example 7 was a polyester-based knitted fabric, and the fabric was thin, resulting in poor contact cold sweat, hygroscopicity, and skin texture. The knitted fabric of Comparative Example 8 had a low titanium oxide content and was inferior in ultraviolet shielding properties. The knitted fabric of Comparative Example 9 was a tight fabric due to the large total fineness of the polyurethane elastic yarn, resulting in poor ventilation resistance and water absorption quick drying. In the knitted fabric of Comparative Example 10, since the cellulose-based spun yarn is thicker than the polyester yarn, the cellulose-based spun yarn of the inner surface layer appears to flicker on the outer surface layer side formed from the polyester yarn (irritated feeling is The results were inferior in reversible properties, and the results were inappropriate for the appearance quality, including spouts peculiar to spun yarn.

DESCRIPTION OF SYMBOLS 1 Basic part 2 Convex part 3 Long side of basic part 4 Short side of basic part 5 Height of convex part 6 Inscribed circle of irregular cross section 7 circumscribed circle of irregular cross section 8 Polyester yarn 9 Cellulosic spun yarn 10 Polyurethane elastic yarn

Claims (6)

A knitted fabric including polyester yarn, cellulosic spun yarn, and polyurethane elastic yarn,
The polyester yarn contains 1.0 to 5.0% by mass of titanium oxide, is formed of a modified cross-section polyester filament having a modified degree of 2.0 to 10.0, and has a total fineness of 56 to 110 dtex. Polyester yarn,
The cellulosic spun yarn is a cellulosic spun yarn having a total count of 70 to 120 and thinner than the polyester yarn,
The polyurethane elastic yarn is a polyurethane elastic yarn having a total fineness of 16 to 33 dtex,
The polyester yarn, the knitted fabric has a layer mainly formed from the polyester yarn on one surface, and a layer mainly formed from the cellulosic spun yarn on the other surface, It is knitted in a tengu structure with cellulosic spun yarn and polyurethane elastic yarn,
A knitted fabric, wherein the knitted fabric has a thickness of 0.1 to 0.6 mm.   The knitted fabric according to claim 1, wherein the knitted fabric is knitted with a three-layer bare tentacle structure by arranging the polyester yarn, the cellulose-based spun yarn, and the polyurethane elastic yarn in this order. Earth.   The mixing ratio of the polyester yarn, the cellulose-based spun yarn, and the polyurethane elastic yarn is 40 to 60% by mass of the polyester yarn, 30 to 50% by mass of the cellulose-based spun yarn, and 3 to 10% by mass of the polyurethane elastic yarn. The knitted fabric according to claim 1 or 2, wherein the knitted fabric is characterized.   The knitted fabric according to any one of claims 1 to 3, wherein the cellulose-based spun yarn is made of lyocell fiber and has a fluff index of 5 mm or more and 20 pieces / 10 m or less.   A textile product using the knitted fabric according to any one of claims 1 to 4. A polyester yarn having a total fineness of 56 to 110 dtex composed of a modified cross-section polyester filament containing 1.0 to 5.0% by mass of titanium oxide and having an irregularity of 2.0 to 10.0,
Cellulosic spun yarn having a total count of 70 to 120 and thinner than the polyester yarn, and
The method for producing a knitted fabric according to any one of claims 1 to 4, comprising a step of arranging polyurethane elastic yarns having a total fineness of 16 to 33 dtex in this order and knitting so as to form a tentacle structure. .

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