JP2017125293A - Functional fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fiber producible without causing an adverse effect on spinning operability and further having an excellent heat insulation effect.SOLUTION: A functional fiber is a sheath-core composite fiber blended with pyrogenic fine particles and far-infrared emissive fine particles, and further has a sheath-core structure, where the far-infrared emissive fine particles are contained in the sheath part and the pyrogenic fine particles are contained in the core part or the sheath part. The far-infrared emissive fine particles are at least one kind selected from mica, tin oxide and talc, and the pyrogenic fine particles are at least one kind selected from carbon, zirconium oxide and zirconium carbide.EFFECT: In the functional fiber, thread breakage and guide wear are suppressed, and a fabric using the fiber has a high thermal insulation effect.SELECTED DRAWING: None

Description

  The present invention relates to a functional fiber excellent in far-infrared radiation performance and heat generation performance.

  Conventionally, many knitted and knitted fabrics for the purpose of keeping warm have been put on the market, and various techniques such as the use of dead air by hollow fibers, the use of moisture absorption heat generation effect, the method of converting sunlight into heat, etc. were used. Material has been proposed. However, the use of dead air is a passive method of suppressing heat dissipation by including air, so there is a limit to heat retention against the cold, and the use of an air layer makes the woven or knitted fabric bulky. There was a problem that. In addition, the use of the moisture absorption heat generation effect generates heat by absorbing moisture such as insensitive excretion, but when it absorbs moisture, it generates heat, but it has low sustainability and immediately releases heat. There was a problem. On the other hand, the method of converting sunlight into heat has a problem that although a sufficient effect is recognized outdoors in fine weather, the effect can hardly be expected in rainy weather or indoors.

  On the other hand, in recent years, a technique for imparting a heat retaining effect to fibers using far-infrared radioactive fine particles has been proposed. For example, Patent Document 1 discloses a fiber containing 3% by weight or more of far-infrared radioactive fine particles. In Patent Document 2, mica having an average particle diameter of 2.5 to 5.0 μm and mica having an average particle diameter of 8.0 to 13.0 μm are added to polyester in a ratio of 4/6 to 8/2 in a weight ratio. A far-infrared ray irradiating polyester containing 3 to 8% by weight is disclosed. Furthermore, Patent Document 3 discloses a sheath portion made of a polymer containing 1 to 10% by weight of far-infrared radioactive fine particles exhibiting a specific far-infrared irradiation rate, and a core portion made of a polymer containing 10 to 70% by weight of the fine particles. Disclosed is a far-infrared radioactive functional fiber. Further, Patent Document 4 discloses a functional fiber having a core-sheath structure including a thermoplastic polymer containing far-infrared radiation fine particles in a sheath portion, and the far-infrared radiation fine particles are 3% by weight of the whole fiber. A fiber is disclosed.

  However, as in Patent Documents 1 to 4, in order to increase the heat retention effect of the fiber using only the far-infrared radioactive fine particles, it is necessary to contain or attach a large amount of the far-infrared radioactive fine particles, and the yarn breaks during spinning. There is a problem that the wear of the guide and the guide are likely to occur and the spinning operability is deteriorated. In the technique of Patent Document 4, although the far-infrared radioactive fine particles are localized in the sheath portion of the core-sheath structure, the spinning operability is improved, but it is still not satisfactory.

  Furthermore, as in Patent Documents 1 to 4, with the technology that provides the heat insulation effect to the fiber using only the fine particles having far-infrared radiation characteristics, there is a limit to the heat insulation effect that can be realized, and sufficient warmth is realized. The current situation has not yet been reached.

JP-A 63-227828 Japanese Patent Laid-Open No. 9-77961 JP 63-152413 A Japanese Patent Laid-Open No. 2-154209

  An object of the present invention is to provide a fiber that can be produced without adversely affecting the spinning operability and that has an excellent heat retaining effect. Furthermore, an object of this invention is to provide the thread | yarn and fabric using the said fiber.

  As a result of intensive studies to solve the above problems, the present inventors have found that fibers containing exothermic fine particles and far-infrared emitting fine particles have a high heat retention effect. Furthermore, by including far-infrared radiation fine particles in the sheath part of the fiber having a core-sheath structure, and by containing exothermic fine particles in the core part or the sheath part, the heat generation action and the far-infrared radiation action are enhanced, and these synergistic actions. It was found that the heat retention effect is further improved. The present invention has been completed as a result of further studies based on these findings. That is, this invention provides the functional fiber of the following aspect, a thread | yarn, and a fabric.

(1) A functional fiber characterized by containing exothermic fine particles and far-infrared radioactive fine particles.
(2) The functional fiber according to (1), wherein the far-infrared radioactive fine particles are at least one selected from the group consisting of mica, tin oxide, and talc.
(3) The functional fiber according to (1) or (2), wherein the exothermic fine particles are at least one selected from the group consisting of carbon, zirconium oxide, and zirconium carbide.
(4) The function according to any one of (1) to (3), which has a core-sheath structure, far infrared radiation fine particles are contained in the sheath, and exothermic fine particles are contained in the core or the sheath. Sex fibers.
(5) The far-infrared radioactive fine particles and the exothermic fine particles are contained in the sheath part, and the content of the far-infrared radioactive fine particles is 0.1 to 2.5 parts by mass with respect to 100 parts by mass of the sheath part. Functional fiber as described in (4) whose content is 0.1-2.5 mass parts with respect to 100 mass parts of sheath parts. (6) The functional fiber according to (4) or (5), wherein the weight ratio of the core sheath (core / sheath) is 95/5 to 15/85.
(7) A yarn containing the fiber according to any one of (1) to (6).
(8) A fabric comprising the yarn according to (7).
(9) The fabric according to (8), which has a cover factor of 850 to 3500.

  According to the present invention, a functional fiber that simultaneously realizes both far-infrared radiation and heat generation characteristics and has an excellent heat retaining effect is provided. Further, when the functional fiber of the present invention has a core-sheath structure and the sheath part contains far-infrared radiation fine particles and exothermic fine particles, even if the content of these fine particles is relatively low, Since both of them are closer to each other, the heat generation effect and the far-infrared effect can be efficiently exhibited, and a further excellent heat retention effect can be achieved. Therefore, according to the functional fiber of the present invention, since the amount of the fine particles blended in the fiber can be reduced, yarn breakage and guide wear caused by the fine particles can be suppressed, and the spinning operability is improved. In addition, the yarn and the fabric using the functional fiber of the present invention are useful as a material for a cold protection garment because of its excellent heat retention.

  The functional fiber of the present invention is characterized by containing exothermic fine particles and far-infrared radioactive fine particles. Hereinafter, the functional fiber of the present invention will be described in detail.

  The constituent polymer of the fiber composite of the present invention is not particularly limited as long as melt spinning is possible, and a polymer conventionally used as a raw material for fibers can be used. Examples of such polymers include polyesters such as polyethylene terephthalate (PET), polybutylene terephthalate, and polytrimethylene terephthalate; polyamides such as nylon 6, nylon 66, nylon 46, nylon 11, and nylon 12; polypropylene, polyethylene, and the like. Polyolefins; Polychlorinated polymers such as polyvinyl chloride and polyvinylidene chloride; Fluoropolymers such as polytetrafluoroethylene and polyvinylidene fluoride; Biomass-derived monomers such as PLA (polylactic acid) and PBS (polybutylene succinate) Biomass polymer obtained by polymerization of the polymer; a copolymer comprising two or more monomers constituting these polymers;

  These polymers may be copolymers containing other constituent monomers in view of viscosity, thermal characteristics, compatibility and the like. For example, when a polyester copolymer (copolyester) is used, aromatic dicarboxylic acids such as isophthalic acid and 5-sulfoisophthalic acid: adipic acid, succinic acid, suberic acid, sebacic acid, dodecanedioic acid Aliphatic dicarboxylic acids such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,4-cyclohexanedimethanol, etc .; glycolic acid, hydroxybutyric acid, hydroxyvaleric acid, hydroxycaproic acid, hydroxypentanoic acid Hydroxycarboxylic acids such as hydroxyheptanoic acid and hydroxyoctanoic acid; copolymers of aliphatic lactones such as ε-caprolactone and polyesters may be used.

  Far-infrared radioactive fine particles are fine particles made of a substance capable of emitting far-infrared rays. Although it does not restrict | limit especially as a far-infrared radioactive fine particle used in this invention, For example, minerals, such as a mica, a talc, a calcite; Oxide-type ceramics, such as a tin oxide, an alumina, a silicon dioxide; Silicon carbide, a boron carbide, etc. Carbide ceramics: metals such as platinum and tungsten. Among these far-infrared radioactive fine particles, mica, tin oxide, talc, and more preferably mica and tin oxide are preferable from the viewpoint of further improving spinning operability and far-infrared radiation performance. These far-infrared radioactive fine particles may be used alone or in combination of two or more.

  The average particle diameter of the far-infrared radioactive fine particles is not particularly limited, but for example, 10 μm or less, preferably 0.1 to 5 μm, more preferably 0.3 to 3 μm. If the average particle diameter of the far-infrared radiation fine particles is within the above range, a superior heat retention effect can be achieved without adversely affecting the spinning operability. Here, the average particle diameter is a volume average particle diameter measured using a laser diffraction scattering method particle size distribution measuring apparatus.

  Although it does not restrict | limit especially as content of the far-infrared radiation fine particle in the functional fiber of this invention, For example, 0.1-10 mass% is mentioned. In particular, the functional fiber of the present invention has an advantage of having an excellent heat retaining effect because the exothermic fine particles described later are used in combination even if the content of far-infrared radioactive fine particles is low. That is, in the present invention, as will be described later, not only can the heat generated by the exothermic fine particles be used to improve the heat retaining effect itself, but the heat can also be used to increase the temperature of the far infrared radioactive fine particles. Since more far-infrared rays are emitted in response to the temperature rise, as a result, a better heat retention effect is achieved.

  From this viewpoint, the content of the far-infrared radioactive fine particles is preferably 0.2 to 5% by mass, more preferably 0.5 to 2.5% by mass, and still more preferably 0.5 to 2% by mass. Further, by reducing the content of far-infrared radioactive fine particles in this way, the spinning operability is further improved.

  The exothermic fine particles are fine particles made of a substance that can generate heat by absorbing electromagnetic waves (including sunlight). The exothermic fine particles used in the present invention are not particularly limited, and examples thereof include zirconium oxide, zirconium carbide, and carbon. Among these exothermic fine particles, carbon and zirconium carbide are preferably used from the viewpoint of further improving the spinning operability and the exothermic performance. These exothermic fine particles may be used individually by 1 type, and may be used in combination of 2 or more type.

  The average particle size of the exothermic fine particles is not particularly limited, and for example, 0.01 to 5 μm, preferably 0.05 to 3 μm, and more preferably 0.1 to 2 μm. When the average particle diameter of the exothermic fine particles is within the above range, a more excellent heat retention effect can be achieved without adversely affecting the spinning operability. Here, the average particle diameter is a volume average particle diameter measured using a laser diffraction scattering method particle size distribution measuring apparatus.

  Although content in particular in the functional fiber of this invention is not restrict | limited, For example, 0.1-10 mass% is mentioned. In particular, the functional fiber of the present invention has an advantage of exhibiting an excellent heat retaining effect even for a low content of exothermic fine particles for the same reason as described above. From this viewpoint, the content of the exothermic fine particles is preferably 0.2 to 5% by mass, more preferably 0.5 to 2.5% by mass, and still more preferably 0.5 to 2% by mass. Further, by reducing the content of the exothermic fine particles in this way, the spinning operability is further improved.

  Further, in the functional fiber of the present invention, the ratio of the far-infrared radioactive fine particles to the exothermic fine particles is not particularly limited, but from the viewpoint of exerting a more excellent heat retention effect, with respect to 1 part by mass of the far-infrared radioactive fine particles. The exothermic fine particles are 0.2 to 5 parts by mass, preferably 0.5 to 2 parts by mass.

  The functional fiber of the present invention thus contains exothermic fine particles and far-infrared radioactive fine particles.

  In the present invention, by containing such exothermic fine particles, sunlight can be efficiently converted into heat and sufficient warmth can be imparted, and even when it is difficult to reach sunlight, such as in rainy weather or indoors, far infrared radiation Warmness can be maintained by the fine particles. In addition, in the present invention, by including both the exothermic fine particles and the far-infrared emitting fine particles in the same fiber, the heat generated by the exothermic fine particles is not only used for imparting warmth, but also in the proximity of the far away particles. It is used to raise the temperature of the infrared radiation fine particles themselves and has a synergistic effect that further enhances the far infrared radiation effect. In particular, when both the exothermic fine particles and the far-infrared emitting fine particles are contained in the fiber sheath part, both of them are closer to each other, so that the above-mentioned effect is efficiently achieved and it is sufficient even if the content of the fine particles is reduced. On the other hand, a heat retention effect is obtained, and on the other hand, the spinning operability is stabilized by reducing the content of fine particles, which is more preferable.

  The combination of far-infrared radiation fine particles and exothermic fine particles blended in the functional fiber of the present invention is not particularly limited. For example, tin oxide and zirconium carbide, mica and zirconium carbide, tin oxide and carbon, mica and carbon, etc. This combination is preferable because the heat retention effect is remarkably enhanced by the synergistic action of these fine particles.

  The structure of the functional fiber of the present invention is not particularly limited, but from the viewpoint of further improving the heat generation performance and far-infrared radiation performance and exhibiting a more excellent heat retaining effect, the core-shell structure is preferably used. Examples include a structure in which infrared radioactive fine particles are contained in the sheath portion and exothermic fine particles are contained in the core portion or the sheath portion. In particular, a core-sheath structure in which far-infrared radioactive fine particles and exothermic fine particles are contained in the sheath portion is particularly suitable because it can exhibit a further excellent heat retaining effect.

  When the functional fiber of the present invention has a core-sheath structure including far-infrared radiation fine particles and exothermic fine particles in the sheath, the content of each fine particle contained in the sheath is included in the fiber of the aforementioned fine particles. Although it sets suitably based on quantity, 0.1-2.5 mass parts of far-infrared microparticles | fine-particles with respect to 100 mass parts of sheath parts from the viewpoint of having a further excellent heat retention effect, Preferably 0.5- 2 parts by mass, more preferably 1.0-2 parts by mass; 0.1 to 2.5 parts by mass, preferably 0.5-2 parts by mass, and more preferably 100 parts by mass of the exothermic fine particles. 1.0-2 mass parts is mentioned. Furthermore, the total content of the far-infrared radioactive fine particles and the exothermic fine particles is preferably 0.2 to 4 parts by mass from the viewpoint of achieving both improvement in spinning operability and expression of a heat retaining effect.

  When the functional fiber of the present invention has a core-sheath structure, the cross-sectional shape is not particularly limited as long as the core part is covered with the sheath part, and a round cross section or an irregular cross section (an elliptical cross section, a triangular cross section, an uneven cross section, etc.) ), And the core-sheath relationship may be concentric or eccentric. The core-sheath weight ratio (core / sheath) is not particularly limited, and examples thereof include 95/5 to 15/85, preferably 85/15 to 40/60. When the core-sheath weight ratio satisfies the above range, a superior heat retaining effect can be achieved without adversely affecting the spinning operability.

  The functional fiber of the present invention may contain conventionally known additives, matting agents, antistatic agents, antioxidants and the like within the range not impairing the effects of the present invention, in addition to the above components.

  As a form of the functional fiber of the present invention, either a staple or a filament may be used. In particular, when used as a filament, it can be used in any form of monofilament or multifilament, but multifilament is generally preferred. In this case, it is preferable that the multifilament is constituted only by the functional fiber of the present invention. However, the multifilament may be mixed with other arbitrary fibers as long as the effect of the present invention is not impaired.

  When the functional fiber of the present invention is in the form of a multifilament, the single yarn fineness is, for example, 0.01 to 30 dtex, preferably 0.1 to 10 dtex, more preferably 0.1 to 3 dtex. The total (total) fineness is, for example, 1 to 500 dtex, preferably 5 to 300 dtex, and more preferably 10 to 200 dtex. By reducing the single yarn fineness, the fiber surface area is increased, and accordingly, the far-infrared radiation performance and the heat generation performance can be improved, and the heat retention effect can be further enhanced. Further, when the single yarn fineness is reduced, the air layer is increased, so that a heat retaining effect due to dead air can be further added.

  The functional fiber of the present invention can be obtained by spinning by a conventionally known method using a polymer, far infrared radiation fine particles and exothermic fine particles. As a method for spinning the functional fiber of the present invention, specifically, a POY method in which a semi-undrawn yarn is obtained by high-speed spinning with a spinning speed of 2000 m / min or higher; once at a low speed of less than 2000 m / min or 2000 m / min or higher. And a method of drawing and heat-treating the wound yarn at a high speed, and a direct spinning drawing method in which drawing is carried out without winding. Moreover, when the functional fiber of this invention has a core-sheath structure, a core-sheath structure can be formed using a normal core-sheath-type composite melt spinning apparatus.

Yarn The yarn of the present invention is formed using the functional fiber. The yarn of the present invention may be a yarn composed only of the fiber, or may be a mixed yarn of the functional fiber and another fiber. When the yarn of the present invention is a mixed yarn, other fibers used can be selected from conventionally known fibers, such as natural fibers such as cotton, hemp, silk, wool; viscose rayon And recycled fibers such as cupra and polynosic; and synthetic fibers such as polyamide, polyester and polyurethane. When the yarn of the present invention is a mixed yarn, it is produced by a conventionally known method such as interlace processing or taslan processing. When the yarn of the present invention is a composite yarn, the content of the functional fiber is, for example, 10% by mass or more, preferably 30 to 90% by mass, and more preferably 50 to 90% by mass.

  Moreover, you may twist the thread | yarn of this invention as needed. The number of twists in this case is not particularly limited, and examples thereof include 10 to 3000 T / m, preferably 50 to 2000 T / m, and more preferably 100 to 1000 T / m. When twisting, a ring-type twisting machine or a double twister is generally used. Furthermore, the yarn of the present invention may be false twisted. The method of false twisting is not particularly limited, and can be performed by employing conventionally known conditions. When the yarn of the present invention is crimped by false twisting, the air layer is increased, so that a heat retaining effect due to dead air can be further added. Moreover, it is good also as a processed thread | yarn combining a false twist process and a mixed fiber process.

Fabric The fabric of the present invention is formed using the yarn. The fabric of the present invention may be formed of the yarn alone, or may be formed of a combination of the yarn and other yarns as long as the effects of the present invention are not impaired. Further, the fabric of the present invention may be any of woven fabric, knitted fabric, non-woven fabric and the like.

Although it does not restrict | limit especially as a cover factor (CF) of the fabric of this invention, For example, 850-3500, More preferably, it is 1000-3500, More preferably, 1500-2500 is mentioned.
The cover factor is expressed by the following equation.
CF = Wa × √ (Da / 1.11) + We × √ (De / 1.11)
Here, Wa: the number of warp yarns per 2.54 cm (1 inch) of the fabric We: the number of weft yarns per 2.54 cm (1 inch) of the fabric Da: fineness (dtex) of the warp yarns constituting the fabric
De: Fineness of fabric weft (dtex)

  In the fabric of the present invention, by setting the cover factor of the fabric within the above range, the density of the fabric increases, so that heat retention can be increased without releasing heat from the human body and the distance between the functional fibers is increased. Because they are close to each other, the heat generated by the exothermic fine particles is efficiently transferred without escaping, and since the functional fibers are adjacent to each other, the heat from all directions is efficiently transferred to the far-infrared radioactive fine particles. The infrared radiation effect is further enhanced.

  Moreover, in order that the fabric of this invention may fully exhibit a heat retention effect, it is preferable to use the said functional fiber 20-20 mass% with respect to the whole fabric.

  In addition, the fabric of the present invention may be subjected to treatments such as dyeing, coloring print, embossing, water repellent, antibacterial, phosphorescent, and deodorizing according to a conventionally known method, if necessary.

  The use of the fabric of the present invention is not particularly limited. For example, various inners, T-shirts, jackets, windbreakers, wet suits, ski wear, gloves, hats, tents, insoles, futon side areas, etc. It is suitably used as a raw material for textile products that require properties.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, this invention is not limited to these.

Each measuring method and evaluation method are as follows.
(1) Intrinsic viscosity [η]
It measured based on the conventional method on the conditions of 20 degreeC by using the equal mass mixture of phenol and ethane tetrachloride as a solvent.

(2) Spinning operability The number of cuts when spinning for 24 hours was measured, and the spinning operability was evaluated according to the following criteria.
<Criteria for spinning operability>
○: Number of times of cutting thread 0-2 times △: Number of times of cutting thread 3-5 times ×: Number of times of cutting thread 6 times or more

(3) Far-infrared radiation The far-infrared radiation intensity of the fabric obtained in each of the examples and comparative examples was measured. The measurement was performed using an infrared spectrophotometer FT-IR apparatus at a measurement temperature of 40 ° C. and a measurement wavelength range of 5 to 20 μm. At that time, the far-infrared radiant intensity of the black body under the same conditions is also measured, and the ratio (%) of the radiant intensity of each fabric when the radiant intensity of the black body at each wavelength is defined as 100% is calculated at each wavelength. The average value of the ratio was calculated as the average emissivity (%). Moreover, as a blank, except that far-infrared radioactive fine particles and exothermic fine particles are not included, each woven fabric prepared using fibers having the same composition as each Example and Comparative Example was used, and the average emissivity (%) was similarly determined. Asked. And far-infrared radiation was computed based on following Formula.
<Calculation formula of far-infrared radiation>
Far-infrared radiation = [(average emissivity of the resulting fabric (%) − average emissivity of blank (%)) / average emissivity of blank (%)] × 100

(4) Heat generation characteristics The fabric obtained in each Example and Comparative Example was irradiated with a reflex lamp so that the illuminance was 10,000 LUX, and the surface temperature of the fabric was observed by thermography from the back side. In addition, when the surface temperature was measured also about the said blank, all were 39.5 degreeC.

(5) Guide wear property About each false twisted yarn (multifilament) obtained in each Example and Comparative Example, after rewinding 100000 m with a rewinding machine having a stainless steel traveler, the surface state of the traveler was observed with a microscope. Guide wear was evaluated according to the criteria.
<Guidelines for guide wear resistance>
○: Wear is not recognized or there is no problem even if there is wear.
Δ: Slightly worn.
X: Strong wear is recognized.

Example 1
As the sheath material, a resin composition containing 1.0% by mass of tin oxide as far-infrared radiation fine particles and 99.0% by mass of a polyester resin (ultimate viscosity 0.65) having polyethylene terephthalate as a main component was used.
On the other hand, as the core material, a resin composition containing 1.0% by mass of zirconium carbide as exothermic fine particles and 99.0% by mass of a polyester resin (intrinsic viscosity 0.65) having polyethylene terephthalate as a main component was used. .
Using a core-sheath composite nozzle plate having 24 holes, the sheath-sheath material and the core material, the core-sheath weight ratio (core / sheath) is 15/85, the spinning speed is 1400 m / min, the spinning temperature is 290 ° C., The yarn was spun at a discharge rate of 21 g / min and a draw ratio of 2.9, and the drawn yarn (the yarn of the present invention) was scraped off.
Next, this drawn yarn is fed to a false twisting machine (“LS-6” manufactured by Mitsubishi Heavy Industries, Ltd.), a processing speed of 120 m / min, a draw ratio of 1.03 times, a false twist number of 4200 T / M, and a heater temperature of 170. False twisting was performed at 0 ° C. to obtain a false twisted yarn of 56 dtex / 24f.
The obtained false twisted yarn was woven using warp, and the resulting raw machine was scoured, dyed and finished according to a conventional method to obtain a weft with a weft density of 132 × 120 pieces / 2.54 cm (CF: 1789). .

Examples 2-4
A false twisted yarn was obtained by the same method as in Example 1 except that the types and contents of far-infrared radioactive particles and exothermic fine particles were changed as shown in Table 1 below. A standard woven fabric was obtained.

Example 5
The sheath material is 1.0% by weight of mica as far-infrared radiation fine particles, 1.0% by weight of carbon as exothermic fine particles, and a polyester resin mainly composed of polyethylene terephthalate (extreme viscosity 0.65) 98.0. A resin composition containing mass% was used.
On the other hand, the core material used was 100% by mass of a polyester resin (intrinsic viscosity 0.65) containing polyethylene terephthalate as a main component.
Thereafter, false twisted yarn was obtained by the same method as in Example 1, and further, a fabric of the same standard as that in Example 1 was obtained.

Examples 6 and 7
A resin composition having the same composition as in Example 5 was used except that the contents of mica and carbon in the sheath were changed to the amounts shown in Table 1 below, and the false twisted yarn was prepared in the same manner as in Example 1. Further, a fabric of the same standard as that of Example 1 was obtained.

Example 8
Resin containing 1.0% by weight mica as far-infrared radiation fine particles, 1.0% by weight carbon as heat-generating fine particles, and 98.0% by weight polyester resin (extreme viscosity 0.65) comprising polyethylene terephthalate as main components A composition was prepared. Then, using this resin composition, spinning and false twisting were performed under the same conditions as in Example 1, and then, using the obtained false twisted yarn, a fabric of the same standard as that of Example 1 was obtained.

Examples 9, 10
In Examples 9 and 10, functional fibers having the same composition as in Example 5 were used. By replacing a part of the warp and weft with normal 56 dtex / 24 f polyester multifilament yarn, the content (mixing ratio) of functional fibers in the raw machine is 40 mass% (Example 9), 20 mass% (Example) Weaving and post-processing were performed under the same conditions as in Example 1 except that each was changed to 10) to obtain a fabric of the same standard as that in Example 1.

Examples 11 and 12
In Examples 11 and 12, functional fibers having the same composition as in Example 5 were used. In the case of Example 1, except that the weft density of the woven fabric was changed to 70 × 58 / 2.54 cm (CF: 909, Example 11) and 150 × 138 / 2.54 cm (CF: 2045, Example 12), respectively. Weaving and post-processing were performed under the same conditions to obtain two types of woven fabric.

Examples 13 and 14
In Examples 13 and 14, a functional fiber having the same composition as in Example 5 is used, and a part of the warp and weft is replaced with a normal 56 dtex / 24f polyester multifilament yarn, thereby occupying the function in the living machine. The content (mixing ratio) of the conductive fiber was 40% by mass. In the case of Example 1, the weft density of the fabric was changed to 70 × 58 / 2.54 cm (CF: 909, Example 13) and 150 × 138 / 2.54 cm (CF: 2045, Example 14), respectively. Weaving and post-processing were performed under the same conditions to obtain two types of woven fabric.

Comparative Example 1
Except for using a resin composition containing 99.0% by mass of carbon resin of 1.0% by mass as exothermic fine particles and a polyester resin (intrinsic viscosity 0.65) having polyethylene terephthalate as a main component as the sheath material. Using a resin composition having the same composition as in Example 5, a false twisted yarn was obtained by the same method as in Example 1, and then using the obtained false twisted yarn, the same standard as that of Example 1 was obtained. A woven fabric was obtained.

Comparative Example 2
Other than using a resin composition containing 1.0% by weight of mica as far-infrared radioactive fine particles and 99.0% by weight of a polyester resin (intrinsic viscosity 0.65) as a main component, as the sheath material. Uses a resin composition having the same composition as in Example 5 and obtains a false twisted yarn in the same manner as in Example 1, and then uses the obtained false twisted yarn to determine the same standard as in Example 1. Fabric was obtained.

Comparative Example 3
Using a resin composition having the same composition as in Example 5 except that the content of mica or carbon in the sheath was changed to the amount shown in Table 1 below, a false twisted yarn was obtained in the same manner as in Example 1. Furthermore, a fabric of the same standard as that of Example 1 was obtained.

The composition of the fibers prepared in the evaluation results above Examples and Comparative Examples, and the results of evaluation are shown in Table 1 below.

  From the above results, it was shown that the fabric containing the functional fiber of the present invention can simultaneously realize both functions of heat generation and far-infrared radiation, and has an excellent heat retaining effect (Examples 1 to 14). ). Further, when the functional fiber of the present invention has a core-sheath structure, for example, when the results of Examples 1 and 2 and Example 5 are compared, the far-infrared radiation is further enhanced, and the sheath part generates heat. It has been shown that a fabric having higher heat retention can be obtained by containing both the fine particles and the far-infrared radiation fine particles. Furthermore, even when the mixing ratio of the functional fibers of the present invention in the fabric is relatively low, such as 20% by mass or 40% by mass, it has good heat generation characteristics and far infrared radiation characteristics, and is sufficient. It was shown to have heat retention (Examples 9, 10, 13, 14). Further, from the results of Examples 11 to 14 in which the cover factor is changed, the heat retention is further increased if the density is high (Examples 12 and 14), but sufficient heat retention can be obtained even with a low-density fabric. (Examples 11 and 13).

  Further, the functional fiber of the present invention had good spinning operability and suppressed guide wear (Examples 1 to 14). Further, when the functional fiber of the present invention has a core-sheath structure, the spinning operability and the guide wear resistance are more effectively suppressed (Examples 1 to 7, 9 to 14), and the production is problematic. Not shown.

  On the other hand, it was shown that the fabric (Comparative Examples 1 and 2) containing either exothermic fine particles or far-infrared radiation fine particles cannot simultaneously realize both excellent far-infrared radiation and exothermic properties. . In addition, the functional fiber (Comparative Example 3) containing 3.0% by mass of exothermic fine particles and far infrared radiation fine particles is excellent in heat generation characteristics and far infrared radiation performance. It was shown that there was a problem and that it would be a manufacturing problem.

  Moreover, in the functional fiber of this invention, it verified also how much the far-infrared radiation effect improved by using the heat | fever which exothermic microparticles | fine-particles generate | occur | produce also for the temperature rise of a far-infrared microparticle. Specifically, the fabrics of Examples 5 and 6 (surface temperatures of 46.1 ° C. and 47.4 ° C., respectively) were used as test pieces, and the measurement temperature when measuring “(3) far-infrared radiation” was measured. And 46.1 ° C and 47.4 ° C, respectively. As a result, the far-infrared radiation was 19.9 for the fabric of Example 5 and 21.3 for the fabric of Example 6. That is, according to the functional fiber of the present invention, not only can the heat generated by the exothermic fine particles be used to improve the heat retention effect itself, but also the heat can be used to increase the temperature of the far infrared radioactive fine particles. It was shown that more far infrared rays are emitted as the temperature rises.

Claims (9)

  A functional fiber comprising exothermic fine particles and far-infrared radioactive fine particles.   The functional fiber according to claim 1, wherein the far-infrared radioactive fine particles are at least one selected from the group consisting of mica, tin oxide, and talc.   The functional fiber according to claim 1 or 2, wherein the exothermic fine particles are at least one selected from the group consisting of carbon, zirconium oxide, and zirconium carbide.   The functional fiber according to any one of claims 1 to 3, which has a core-sheath structure, far infrared radiation fine particles are contained in a sheath portion, and exothermic fine particles are contained in the core portion or the sheath portion.   The far-infrared radioactive fine particles and the exothermic fine particles are contained in the sheath, the content of the far-infrared radioactive fine particles is 0.1 to 2.5 parts by mass with respect to 100 parts by mass of the sheath, and the content of the exothermic fine particles is The functional fiber of Claim 4 which is 0.1-2.5 mass parts with respect to 100 mass parts of sheath parts.   The functional fiber according to claim 4 or 5, wherein a weight ratio of the core sheath (core / sheath) is 95/5 to 15/85.   A yarn comprising the fiber according to any one of claims 1 to 6.   A fabric comprising the yarn according to claim 7.   The fabric according to claim 8, wherein the cover factor is 850 to 3500.