Rayon fiber and textile products made from it

Abstract

To provide a textile product capable of effectively improving the cold protection function. [Solution] Fuji lava stone, which has an emissivity of far-infrared rays in the wavelength range of 4 μm to 24 μm of 80% or more when the radiation intensity of a black body is taken as 100, is powdered to an average particle size of 0.1 μm to 0.5 μm to produce ultra-fine Fuji lava powder. This powder is mixed with cellulose in an amount of 5% to 40% by mass using rayon fiber to produce textile products such as clothing, bedding, carpets, and mats.

Description

[Technical Field]

[0001] The present invention relates to rayon fibers and textile products made from them. [Background technology]

[0002] Conventionally, there has been no technology for kneading lava powder into fibers that has an average particle size of less than 1.0 μm and that represents a specific numerical range (Patent Documents 1 to 3).

[0003] For example, Patent Document 2 discloses a method for producing lava-dyed fibers, which involves dyeing a natural or synthetic fiber matrix with a dye containing a large amount of lava powder and / or volcanic ash obtained by crushing lava. Conventionally, fibers have been dyed with lava powder. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-2384 [Patent Document 2] Patent Publication No. 2009-191417 [Patent Document 3] Utility Model Application No. 2010-4058 (Registered Utility Model No. 3163801) Summary of the Invention [Problem to be solved by the invention]

[0005] The purpose of this invention is to provide a new fiber that incorporates lava powder. [Means for solving the problem]

[0006] Conventionally, even among lava powders with particle diameters of less than 1.0 μm, it has been extremely difficult to prepare particles finer than this value, i.e., ultra-fine particles, or to use them in a manner that allows them to be kneaded into fibers.

[0007] After extensive research, the inventor has developed a technology that allows the fibers to effectively exhibit far-infrared radiation function by kneading ultra-fine Mt. Fuji lava powder into the fibers when manufacturing the fibers that incorporate lava powder.

[0008] The fibers of the present invention are characterized in that they are kneaded with ultra-fine Mt. Fuji lava powder, which has an average particle size of 0.1 μm to 0.5 μm, and the fibers are made of rayon, polyester, nylon, etc.

[0009] The fiber manufacturing method of the present invention includes a step of kneading ultra-fine Mt. Fuji lava powder into the fiber, and the ultra-fine Mt. Fuji lava powder has an average particle size of 0.1 μm to 0.5 μm, and the fiber is characterized by being made of rayon, polyester, nylon, etc.

[0010] The fibers are kneaded with ultra-fine Mt. Fuji lava powder, which effectively generates negative ions.

[0011] The present invention encompasses the following rayon fibers and textile products using the same.

[0012] Section 1. This rayon fiber is made by kneading ultra-fine Mt. Fuji lava powder, which is made by powdering Mt. Fuji lava stone, which has an emissivity of 80% or more in the far-infrared wavelength range of 4μm to 24μm, with the radiation intensity of a black body being taken as 100, to an average particle size of 0.1μm to 0.5μm, into cellulose at a rate of 5% to 40% by mass.

[0013] Section 2. Specific gravity is 2.5g / cm 3 2. The rayon fiber according to claim 1, wherein the fiber is made of lava stone from Mount Fuji.

[0014] Section 3. A textile product comprising any one of clothing, bedding, bedding, carpets and mats, using the rayon fiber according to claim 1 or 2.

[0015] The ultra-fine Mt. Fuji lava powder preferably has an average particle size of 0.1 μm to 0.5 μm (approximately 0.3 μm). By adjusting the average particle size within this range, the ultra-fine Mt. Fuji lava powder can be effectively kneaded into fibers. By adjusting the average particle size within this range, fibers incorporating the ultra-fine Mt. Fuji lava powder effectively exhibit far-infrared radiation function. By adjusting the average particle size within this range, the ultra-fine Mt. Fuji lava powder effectively exhibits negative ion generation effect. [Effects of the Invention]

[0016] This invention can provide a new fiber that incorporates lava powder. [Brief explanation of the drawings]

[0017] [Figure 1] Figure 1 is a diagram illustrating the slurry of coarse particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. In the initial slurry, the Mt. Fuji lava was successfully powdered to an average particle size of approximately 23.7 μm, a median diameter of approximately 14.8 μm, and a mode diameter of approximately 12.4 μm. [Figure 2] Figure 2 is a diagram illustrating the slurry of coarse particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. #1 Coarse grinding for 20 minutes resulted in the Mt. Fuji lava being ultra-finely ground to an average particle size of approximately 0.75 μm, a median diameter of approximately 0.43 μm, and a mode diameter of approximately 0.36 μm. [Figure 3] Figure 3 is a diagram illustrating the slurry of coarse particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. After one hour of #1 coarse grinding, the Mt. Fuji lava was ultra-finely ground to an average particle size of approximately 0.35 μm, a median diameter of approximately 0.21 μm, and a mode diameter of approximately 0.18 μm. [Figure 4]Figure 4 is a diagram illustrating the slurry of coarse particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. #1 Coarse grinding for 1.5 hours resulted in the Mt. Fuji lava being ultra-finely ground to an average particle size of approximately 0.29 μm, a median diameter of approximately 0.18 μm, and a mode diameter of approximately 0.16 μm. [Figure 5] Figure 5 is a diagram illustrating the nanometer-sized particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. #2 After 30 minutes of fine grinding, the Mt. Fuji lava was ultra-finely pulverized to an average particle size of approximately 0.14 μm, a median diameter of approximately 0.12 μm, and a mode diameter of approximately 0.12 μm. [Figure 6] Figure 6 is a diagram illustrating the nanometer-sized particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. After one hour of #2 fine grinding, the Mt. Fuji lava was ultra-finely milled to an average particle size of approximately 0.13 μm, a median diameter of approximately 0.12 μm, and a mode diameter of approximately 0.12 μm. [Figure 7] Figure 7 is a diagram illustrating the nanometer-sized particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. #2 Fine grinding for 1.5 hours resulted in the Mt. Fuji lava stone being ultra-finely ground to an average particle size of approximately 0.09 μm, a median diameter of approximately 0.09 μm, and a mode diameter of approximately 0.08 μm. [Figure 8] Figure 8 is a diagram illustrating the nanometer-sized particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. After two hours of #2 fine grinding, the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.09 μm, a median diameter of approximately 0.08 μm, and a mode diameter of approximately 0.08 μm. [Figure 9] Figure 9 is a diagram illustrating the nanometer-sized particles of Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention. After 3 hours of #2 fine grinding, the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.09 μm, a median diameter of approximately 0.08 μm, and a mode diameter of approximately 0.08 μm. [Figure 10]Figure 10 is a diagram illustrating the Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of the present invention. The graph of the far-infrared radiation energy of the Mt. Fuji lava stone (sample) is close to the graph showing the radioactivity of a blackbody, indicating that the far-infrared radiation energy is high. [Figure 11] Figure 11 is a diagram illustrating the Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of the present invention. The graph of the far-infrared emissivity of the Mt. Fuji lava stone (sample) shows a high ratio compared to the radiation intensity of a black body, indicating that the far-infrared radiation energy is high. [Figure 12] Figure 12 is a diagram illustrating the Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of the present invention. It shows the results of a component analysis of powdered Mt. Fuji lava stone, performed using a simple quantitative analysis method (EP method) using fluorescent X-rays. [Figure 13] Figure 13 is a diagram illustrating the Mt. Fuji lava stone used in the ultra-fine Mt. Fuji lava powder-kneaded fiber of the present invention. Regarding the generation of negative ions, an increase in the amount of negative ions was observed when a plate of Mt. Fuji lava stone was left in a room. [Figure 14] Figure 14 is a diagram illustrating fabric prepared from the fiber kneaded with the ultra-fine Mt. Fuji lava powder of the present invention. The far-infrared spectral emissivity of the fabric was measured. The integrated spectral emissivity of the fabric prepared from the fiber kneaded with the ultra-fine Mt. Fuji lava powder (average particle size 0.3 μm) of the present invention was significantly higher by 2.35% than that of the comparison fabric (Mt. Fuji lava powder: average particle size 0.6 μm). DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will be described in detail below.

[0019] The embodiments of the present invention are intended to provide a better understanding of the gist of the invention, and unless otherwise specified, do not limit the content of the invention.

[0020] In this specification, the terms "comprise" and "contain" are concepts that encompass all of "comprise," "consist essentially of," and "consist only of."

[0021] In this specification, when a numerical range is expressed as "A to B," it means "not less than A and not more than B."

[0022] In this specification, the expressions parts, % and the like are generally used.

[0023] In this specification, unless otherwise specified, all parts by mass or % by mass (wt%) are used.

[0024] [1] Manufacturing method for ultra-fine Mt. Fuji lava powder kneaded fiber The method for manufacturing the fiber of the present invention is referred to as a method for manufacturing fibers incorporating ultra-fine Mt. Fuji lava powder. The method for manufacturing the fiber of the present invention is a method for manufacturing fibers incorporating ultra-fine Mt. Fuji lava powder, which includes a step of kneading ultra-fine Mt. Fuji lava powder into the fiber.

[0025] Traditionally, lava powder has been used to dye fibers.

[0026] This invention is characterized by kneading ultra-fine Mt. Fuji lava powder into the fiber when manufacturing the lava powder-incorporated fiber.

[0027] The ultra-fine Mt. Fuji lava powder preferably has an average particle size of 0.1 μm to 5 μm, and more preferably has an average particle size of 0.1 μm to 0.5 μm (about 0.3 μm), or about 0.1 μm to 0.3 μm.

[0028] By adjusting the average particle size of the ultra-fine Mt. Fuji lava powder to be kneaded into fibers within the above range, it can be kneaded into fibers well. By adjusting the average particle size of the ultra-fine Mt. Fuji lava powder to be kneaded into fibers within the above range, fibers kneaded with ultra-fine Mt. Fuji lava powder can well exhibit the far-infrared radiation function of the ultra-fine Mt. Fuji lava powder. By adjusting the average particle size of the ultra-fine Mt. Fuji lava powder to be kneaded into fibers within the above range, the ultra-fine Mt. Fuji lava powder can well exhibit the negative ion generation effect.

[0029] The fiber is preferably at least one fiber selected from the group consisting of rayon, polyester, and nylon.

[0030] In the fiber manufacturing method of this invention, by kneading ultra-fine Mt. Fuji lava powder into the fiber, the resulting fiber can exhibit excellent far-infrared radiation function. Textile products using this fiber can be expected to have excellent cold-weather protection.

[0031] In the fiber manufacturing method of the present invention, ultra-fine Mt. Fuji lava powder is kneaded into the fiber, thereby making it possible to obtain fiber that has ultra-fine Mt. Fuji lava powder kneaded into it, which has an excellent negative ion generating effect.

[0032] The fiber manufacturing method of the present invention can thus effectively produce fibers that incorporate ultra-fine Mt. Fuji lava powder, which simultaneously exhibits far-infrared radiation function and negative ion generation effect.

[0033] [1-1] Ultra-fine Mt. Fuji lava powder The ultra-fine Mt. Fuji lava powder-infused fiber of this invention has ultra-fine Mt. Fuji lava powder kneaded into the fiber.

[0034] The ultra-fine Mt. Fuji lava powder preferably has an average particle size of 0.1 μm to 5 μm.

[0035] Preparation of ultrafine powder The preparation of the ultrafine powder preferably includes (1) a collection step of collecting lava rock, (2) a crushing step of crushing the collected lava rock, (3) an ultrafine-refining step of ultrafine-refining the lava powder, and (4) a dispersant mixing step of mixing a dispersant.

[0036] (1) Collection process During the collection process, Fuji lava rocks are collected from around Mount Fuji.

[0037] The Fuji lava rock around Mount Fuji is rich in a variety of mineral elements, including Na, Mg, Si, P, K, Ca, Cr, Mn, Fe, Co, and Cu. The main mineral element in Fuji lava rock is silicon.

[0038] Mount Fuji lava The Mt. Fuji lava that constitutes the ultra-fine Mt. Fuji lava powder kneaded into the fibers of the present invention is preferably Mt. Fuji lava stone produced in Gotemba City, Shizuoka Prefecture, and is preferably Mt. Fuji lava stone that has been machined.

[0039] The Mount Fuji lava is preferably a powder containing primarily silicon dioxide (SiO2), with silicon dioxide being 55% by mass or more. The Mount Fuji lava is preferably a mixture containing silica (silicon dioxide including crystalline and amorphous silicon dioxide), silicon dioxide, quartz, crystalline silicon dioxide-quartz, silicic anhydride, and the like.

[0040] The Mount Fuji lava is preferably colorless, white, or discolored crystals of black, purple, or green (International Chemical Safety Cards, Japanese version, ICSC(J), 1997).

[0041] The Mount Fuji lava preferably has a melting point of 1,610°C and a boiling point of 2,230°C (International Chemical Safety Cards, ICSC, 1997). The Mount Fuji lava preferably has a vapor pressure of 10 mmHg (1,732°C) (equivalent value) and 1,333 Pa (1,732°C) (Hazardous Substances Data Bank, HSDB, 2005).

[0042] The specific gravity (density) of the Mt. Fuji lava is preferably 2.5 g / cm 3 (International Chemical Safety Cards, ICSC, 1997).

[0043] The Mt. Fuji lava stone is preferably broken and shredded before being pulverized into fine powder. The breaking and shredding process is preferably carried out by crushing the stone with a crusher, or by successively shredding the stone into plates, blocks, etc., and then crushing the shredded stone in a crusher.

[0044] (2) Crushing process In the crushing process, the particle size of the Mount Fuji lava stone is reduced to the order of 10 microns to produce lava powder.

[0045] The lava rock is preferably pulverized to a particle size suitable for subsequent processing (microparticulation).The lava rock is then pulverized to a particle size of approximately 14 μm, which is suitable for use in a pulverizer in the subsequent ultrafine pulverization (ultra-microparticulation) process.

[0046] The powdering is carried out using various grinding devices, preferably by using a pestle and mortar, grinding the lava rock between disks, or by using a centrifugal impactor.

[0047] The fine powder of the powdered lava rock is preferably classified by sieving. The sieving method is carried out using various sieving machines. The sieving is preferably carried out using a specific sieve mesh. The lava rock is then pulverized to prepare a finely divided lava rock powder with a particle size of 10 microns.

[0048] The preferred crushing process for Mt. Fuji lava Ultra-fine Mt. Fuji lava powder is prepared by crushing Mt. Fuji lava rock.

[0049] The crushing is preferably carried out in a two-stage process, in which the Mt. Fuji lava rock is first roughly crushed (coarse crushing), and then the coarsely crushed lava rock is finely crushed (fine crushing). The crushing is preferably carried out by dry crushing or wet crushing.

[0050] As the crusher for coarse crushing, a bead mill, a hammer mill, a roll crusher, etc. are preferably used. As the crusher for fine crushing, a bead mill, a ball mill, a tower grinder, etc. are preferably used.

[0051] The preparation is carried out by suspending the Mt. Fuji lava rock (subject) in purified water (solvent) (concentration: about 20% by mass). A dispersant (Kao Chemical, Rheodol, etc.) is preferably used for the preparation.

[0052] The crushing of Mount Fuji lava rock is preferably a two-stage process (two-stage crushing method), and in the first stage, the lava rock is coarsely crushed using beads (e.g., large beads, φ0.3 mm beads) (Ashizawa Finetech Co., Ltd., Star Mill LMZ series, bead mill, LMZ2 ceramic specification).

[0053] The first stage treatment is preferably wet grinding, in which the lava stone is suspended in purified water, preferably using a dispersant (Kao Chemical, Rheodol, etc.).

[0054] In the first stage treatment, pulverization (preparation of initial slurry) is carried out to the extent that the coarse particles do not clog the screen (for example, mesh size of about 0.03 mm) of the subsequent second stage treatment. The pulverization in the first stage treatment is preferably adjusted to a temperature range of about 20°C to 50°C (more preferably, about 40°C), and coarse pulverization is preferably carried out for a time range of about 30 minutes to 3 hours (more preferably, about 1 hour to 2 hours).

[0055] The first stage of processing allows for the successful preparation of a slurry (purified water, dispersant) of coarse particles of Mount Fuji lava rock.

[0056] The collected Mt. Fuji lava rock may be washed or sterilized as necessary to remove impurities.

[0057] The cleaning process removes impurities that adhere to and are contained in the Mount Fuji lava rock. For example, high-pressure running water is sprayed onto the surface of the collected lava rock to wash off the surface impurities, or the collected lava rock is soaked in a detergent such as weak acid bleach and washed.

[0058] The sterilization process kills impurities attached to and contained in the collected Mt. Fuji lava rocks. The Mt. Fuji lava rocks are sterilized, for example, by hot water treatment.

[0059] (3) Ultra-fine refinement process In the ultra-fine particle process, the powdered Mount Fuji lava powder is ultra-finely pulverized (ultra-micronized) to an average particle size of approximately 0.1 μm to 5 μm.

[0060] The ultra-fine grinding is preferably carried out by mixing an appropriate amount of purified water (solvent) with the Mt. Fuji lava powder (solute) to prepare a slurry of the Mt. Fuji lava powder, which is then crushed in a crushing device for an appropriate operating time and temperature to produce a powder colloid of Mt. Fuji lava stone.

[0061] The (1) collection process, (2) crushing process, and (3) ultra-fine grinding process are collectively referred to as the (5) Mt. Fuji lava colloid process. From the collected Mt. Fuji lava rock, a colloid of ultra-fine Mt. Fuji lava powder can be obtained using purified water as a solvent.

[0062] Preferred preparation process for ultra-fine powder The crushing of Mount Fuji lava rock is preferably a two-stage process (two-stage crushing method). In the second stage, the coarse particles of the Fuji lava rock obtained in the first stage are finely crushed using beads (e.g., small beads, φ0.1 mm beads) (Ashizawa Finetech Co., Ltd., Star Mill LMZ series, bead mill, LMZ2 ceramic specification). Purified water (solvent) is added to the coarse particles of the lava rock obtained in the first stage to adjust the concentration. In the fine crushing, the coarse particles are preferably crushed to nanometer (nm) size.

[0063] The second stage treatment is preferably wet grinding, in which a slurry of coarse particles of lava rock is suspended in purified water, preferably using a dispersant (Kao Chemical, Rheodol, etc.).

[0064] The pulverization in the second stage treatment is preferably adjusted to a temperature range of about 20°C to 50°C (more preferably, about 30°C), and the pulverization is preferably carried out for a time range of about 30 minutes to 5 hours (more preferably, about 1 hour to 3 hours).

[0065] The second stage treatment allows for the successful preparation of a slurry of fine particles (purified water, dispersant), which in turn allows for the preparation of nanometer (nm) sized fine particles.

[0066] (4) Dispersant mixing process In the dispersant mixing process, a dispersant is added to the lava colloid of ultra-fine Mt. Fuji lava powder to prevent the ultra-fine Mt. Fuji lava powder (solute) in the Mt. Fuji lava colloid from re-solidifying and promote the homogenization of the solute.

[0067] The dispersant is not particularly limited. The dispersant is an agent that has the function of finely and uniformly suspending or floating the ultra-fine Mt. Fuji lava powder (dispersoid, colloidal particles) in the dispersion medium (purified water) and stabilizing the dispersoid without coagulating it.

[0068] The dispersant prevents the lava colloid from re-solidifying and maintains its dispersibility. A dispersant such as "Rheodol" (registered trademark, Kao Corporation, TW-L120) is preferably used.

[0069] Ultra-fine powder particle size The particle size of the ultra-fine Mt. Fuji lava powder is not particularly limited as long as it is large enough to be kneaded into fibers (based on rayon, polyester, nylon, etc.).

[0070] The ultra-fine Mt. Fuji lava powder has an average particle size (arithmetic mean diameter of particle size distribution) of preferably 0.1 μm to 5 μm, more preferably 0.1 μm to 3 μm, even more preferably 0.1 μm to 2 μm, particularly preferably 0.1 μm to 1 μm (about 0.7 μm), and most preferably 0.1 μm to 0.5 μm (about 0.3 μm) or about 0.1 μm to 0.3 μm.

[0071] It has hitherto been technically difficult to prepare ultra-fine Mt. Fuji lava powder with an average particle size of 0.1 μm to 0.5 μm (approximately 0.3 μm) or 0.1 μm to 0.3 μm as powder to be kneaded into fibers, and it has also hitherto been technically difficult to knead such ultra-fine Mt. Fuji lava powder into fibers.

[0072] In this invention, by adjusting the average particle size of ultra-fine Mt. Fuji lava powder within the above range, it can be effectively incorporated into fibers. In this invention, by adjusting the average particle size of ultra-fine Mt. Fuji lava powder within the above range, fibers incorporating the ultra-fine Mt. Fuji lava powder can effectively exhibit far-infrared radiation. In this invention, by adjusting the average particle size of ultra-fine Mt. Fuji lava powder within the above range, the ultra-fine Mt. Fuji lava powder can effectively exhibit negative ion generation. Among ultra-fine Mt. Fuji lava powders, fibers incorporating ultra-fine Mt. Fuji lava powder with an average particle size of 0.1 μm to 0.5 μm (approximately 0.3 μm) or 0.1 μm to 0.3 μm can effectively exhibit far-infrared radiation.

[0073] The ultra-fine Mount Fuji lava powder has a median diameter (d50, the diameter at which the larger and smaller particles are equal when the powder is divided into two at a certain particle diameter) of preferably 0.1 μm to 3 μm, more preferably 0.1 μm to 1.8 μm, even more preferably 0.1 μm to 1.2 μm, particularly preferably 0.1 μm to 0.5 μm or 0.6 μm (about 0.4 μm), and most preferably 0.1 μm to 0.3 μm (about 0.2 μm, about 0.1 μm).

[0074] It has traditionally been technically difficult to prepare ultra-fine Mount Fuji lava powder, particularly one with a median diameter of 0.1 μm to 0.5 μm or 0.6 μm (approximately 0.4 μm), or 0.1 μm to 0.3 μm (approximately 0.2 μm, approximately 0.1 μm), as a powder to be kneaded into fibers, and it has also traditionally been technically difficult to knead such ultra-fine Mount Fuji lava powder into fibers.

[0075] According to the present invention, by adjusting the median diameter of the ultra-fine Mt. Fuji lava powder within the above range, it can be effectively incorporated into fibers. According to the present invention, by adjusting the median diameter of the ultra-fine Mt. Fuji lava powder within the above range, fibers incorporating the ultra-fine Mt. Fuji lava powder can effectively exhibit far-infrared radiation. According to the present invention, by adjusting the median diameter of the ultra-fine Mt. Fuji lava powder within the above range, the ultra-fine Mt. Fuji lava powder can effectively generate negative ions. Among ultra-fine Mt. Fuji lava powders, fibers incorporating ultra-fine Mt. Fuji lava powders with median diameters of 0.1 μm to 0.5 μm, 0.6 μm (approximately 0.4 μm), or 0.1 μm to 0.3 μm (approximately 0.2 μm, approximately 0.1 μm) can effectively exhibit far-infrared radiation.

[0076] The ultra-fine Mount Fuji lava powder has a mode diameter (the particle diameter channel with the highest occurrence rate, the maximum value of the distribution) of preferably 0.1 μm to 3 μm, more preferably 0.1 μm to 1.8 μm, even more preferably 0.1 μm to 1.2 μm, particularly preferably 0.1 μm to 0.5 μm or 0.6 μm (about 0.4 μm), and most preferably 0.1 μm to 0.3 μm (about 0.2 μm, about 0.1 μm).

[0077] It has traditionally been technically difficult to prepare ultra-fine Mount Fuji lava powder, particularly one with a mode diameter of 0.1 μm to 0.5 μm or 0.6 μm (approximately 0.4 μm), or 0.1 μm to 0.3 μm (approximately 0.2 μm, approximately 0.1 μm), as powder to be kneaded into fibers, and it has also traditionally been technically difficult to knead such ultra-fine Mount Fuji lava powder into fibers.

[0078] In this invention, by adjusting the mode diameter of the ultra-fine Mt. Fuji lava powder within the above range, it can be effectively incorporated into fibers. In this invention, by adjusting the mode diameter of the ultra-fine Mt. Fuji lava powder within the above range, fibers incorporating the ultra-fine Mt. Fuji lava powder can effectively emit far-infrared rays. In this invention, by adjusting the mode diameter of the ultra-fine Mt. Fuji lava powder within the above range, the ultra-fine Mt. Fuji lava powder can effectively generate negative ions. Among ultra-fine Mt. Fuji lava powders, fibers incorporating ultra-fine Mt. Fuji lava powders with mode diameters of 0.1 μm to 0.5 μm or 0.6 μm (approximately 0.4 μm), or 0.1 μm to 0.3 μm (approximately 0.2 μm, approximately 0.1 μm) can effectively emit far-infrared rays.

[0079] The particle size of the ultra-fine Mt. Fuji lava powder is measured, for example, using a particle size distribution analyzer LA-950 manufactured by Horiba, Ltd. The particle size distribution analyzer LA-950 employs a laser diffraction / scattering measurement method, measuring the size of fine particles using laser light, with measurements ranging from a minimum of 0.01 μm (10 nm) to a maximum of 3,000 μm (3 mm).

[0080] [1-2] Fiber The ultra-fine Mt. Fuji lava powder-infused fiber of this invention has ultra-fine Mt. Fuji lava powder kneaded into the fiber (the fiber base).

[0081] The fiber is preferably at least one fiber selected from the group consisting of rayon, polyester, and nylon.

[0082] fiber The fibers are natural fibers and synthetic fibers.

[0083] The natural fibers preferably used are plant fibers (cotton, etc.) that are natural fibers obtained from plants, and animal fibers (hair, silk, feathers, etc.) that are obtained from animals.

[0084] The plant fibers preferably used include seed hair fibers made from the seeds of plants such as cotton and kapok (mainly of the Malvaceae family), bast fibers made from the bast parts of plants such as flax and ramie, leaf vein fibers made from the leaf veins of plants such as Manila hemp and sisal (mainly of the Musaceae family), fruit fibers collected from inside coconut fruits, and rush fibers.

[0085] The animal fiber preferably uses animal hair, which is the body hair of mammals, such as sheep's wool, goat's hair (cashmere, mohair), llama's hair (llama hair, vicuna hair, alpaca hair), camel's hair, rabbit's hair (angora), horse's hair, etc. The animal fiber preferably uses silk, which is a fiber extracted from cocoons made by insects of the Bombyx mori family. The animal fiber preferably uses feathers, spider's silk, etc.

[0086] The chemical fibers are preferably organic fibers.

[0087] The organic fibers preferably include synthetic fibers, semi-synthetic fibers, and regenerated fibers.

[0088] Organic synthetic fibers are chemical fibers with a polymeric composition synthesized from low-molecular-weight raw materials, and preferably polyester-based synthetic fibers (polyester), polyamide-based synthetic fibers (nylon), etc. are used.

[0089] Organic semi-synthetic fibers are made from natural polymeric compounds that are spun by combining with other substances to cause some chemical changes. Cellulose-based semi-synthetic fibers (acetate fibers), protein-based semi-synthetic fibers (promix, milk fibers), etc. are preferably used.

[0090] Organic regenerated fibers are made by dissolving natural polymer compounds and then spinning them into fibers. Preferably, cellulose-based regenerated fibers (rayon (viscose rayon), cupra (cuprammonium rayon, copper silk), polynosic, etc.) are used.

[0091] The fibers are preferably rayon, polyester, nylon, etc., more preferably rayon. The rayon fibers are preferably viscose rayon fibers (regenerated cellulose fibers), etc. The polyester fibers are preferably polyethylene terephthalate (PET) fibers, polytrimethylene terephthalate (PTT) fibers, polybutylene terephthalate (PBT) fibers, polyethylene naphthalate (PEN) fibers, polybutylene naphthalate (PBN) fibers, etc. The nylon fibers are preferably nylon 6 fibers, nylon 66 fibers, etc.

[0092] The fibers may be used singly or in the form of a mixture (blend) of two or more types.

[0093] [1-3] Process of kneading ultra-fine Mt. Fuji lava powder into fibers The ultra-fine Mt. Fuji lava powder-infused fiber of this invention has ultra-fine Mt. Fuji lava powder kneaded into the fiber (the fiber base).

[0094] The method for kneading ultra-fine Mt. Fuji lava powder into fibers is preferably to produce fibers kneaded with ultra-fine Mt. Fuji lava powder by spinning a fiber stock solution (preferably a viscose rayon stock solution, etc.) in which the ultra-fine Mt. Fuji lava powder has been mixed and dispersed.

[0095] The fiber stock solution (preferably, a viscose rayon stock solution or the like) is not particularly limited. The fiber stock solution is preferably a solution containing fibers such as cellulose.

[0096] The fiber stock solution is preferably a viscose rayon stock solution.

[0097] Cellulose (8% to 10% by mass) such as pulp or cotton linters is dissolved in a solution containing 5% to 7% by mass of an alkali such as sodium hydroxide and 2.5% to 4% by mass of carbon disulfide to form viscose, which is then spun in acid (wet spinning) to produce viscose.

[0098] The ultra-fine Mt. Fuji lava powder is dispersed in water to form a 5% to 25% by mass aqueous dispersion, which is then added to a fiber stock solution (preferably a viscose stock solution). By adjusting the content of the ultra-fine Mt. Fuji lava powder in the aqueous dispersion to fall within the above range, the dispersion has fluidity, allowing the ultra-fine Mt. Fuji lava powder to be smoothly added to and mixed with the fiber stock solution (preferably a viscose stock solution) continuously. In the case of a viscose stock solution, during viscose regeneration, threads can be smoothly formed and fiberized.

[0099] The amount of ultra-fine Mt. Fuji lava powder added is preferably 1% by mass to 50% by mass, more preferably 5% by mass to 40% by mass, even more preferably 10% by mass to 30% by mass, and particularly preferably 15% by mass to 25% by mass, relative to the fiber (preferably cellulose) in the fiber raw solution (preferably viscose raw solution).

[0100] By adjusting the amount of ultra-fine Mt. Fuji lava powder added to the fiber stock solution within the above range, the properties of the ultra-fine Mt. Fuji lava powder are not buried in the fiber (preferably rayon fiber) and are well exhibited. By adjusting the amount of ultra-fine Mt. Fuji lava powder added to the fiber stock solution within the above range, spinning can be carried out well, the ultra-fine Mt. Fuji lava powder is well retained in the obtained fiber (preferably rayon fiber), and the properties of the fiber (preferably rayon fiber) such as strength and elongation can be maintained.

[0101] Example of manufacturing rayon fiber kneaded with ultra-fine Mt. Fuji lava powder The ultra-fine Mt. Fuji lava powder is dispersed in water to obtain an aqueous dispersion of the ultra-fine Mt. Fuji lava powder (concentration: about 20% by mass).

[0102] First, a viscose stock solution containing 8.7% by mass of cellulose, 6% by mass of sodium hydroxide, and 3.2% by mass of carbon disulfide is prepared.

[0103] Next, an aqueous dispersion of ultra-fine Mt. Fuji lava powder is added quantitatively and continuously using an injection pump so that the ratio of ultra-fine Mt. Fuji lava powder to the cellulose content is 10% by mass, and the viscose concentrate and ultra-fine Mt. Fuji lava powder are mixed uniformly.

[0104] Next, the mixture of the viscose stock solution and the ultra-fine Mt. Fuji lava powder stock solution is spun into fibers by a two-bath tension spinning method. For example, using a spinneret with a nozzle diameter of 0.09 mm and 4,000 holes, the spinning is performed at a spinning speed of 50 m / min to produce a rayon long fiber bundle kneaded with ultra-fine Mt. Fuji lava powder, with a single fiber fineness of about 5.6 dtex and an ultra-fine Mt. Fuji lava powder content of about 10% by mass.

[0105] The coagulation and regeneration bath is, for example, a Mueller bath (about 50°C) having a composition of 100 g / L sulfuric acid, 15 g / L zinc sulfate, and 350 g / L sodium sulfate.

[0106] Next, the long fiber bundles of rayon fiber kneaded with ultra-fine Mt. Fuji lava powder are cut into pieces of about 5 mm and refined by successively subjecting them to hot water treatment, water flow treatment, and water washing treatment. After scouring, excess water is removed from the fiber using a compression roller, and the fiber is dried at a temperature of about 60°C for about 7 hours to obtain rayon fiber kneaded with ultra-fine Mt. Fuji lava powder.

[0107] The rayon fiber kneaded with ultra-fine Mt. Fuji lava powder is used for, for example, clothing, bedding, carpets, mats, sheets, etc.

[0108] Amount of ultra-fine Mt. Fuji lava powder kneaded into textile products The amount (content) of ultra-fine Mount Fuji lava powder kneaded into textile products is preferably 1% by mass to 50% by mass, more preferably 2% by mass to 40% by mass, even more preferably 5% by mass to 20% by mass, and particularly preferably 8% by mass to 15% by mass, relative to the fiber (rayon, etc.).

[0109] By adjusting the amount (content) of ultra-fine Mt. Fuji lava powder kneaded into textile products within the above range, the ultra-fine Mt. Fuji lava powder is kneaded into the fibers well, and the far-infrared radiation function can be effectively exhibited. Textile products using this fiber can effectively improve their cold protection function.

[0110] The fiber of the present invention has ultra-fine Mt. Fuji lava powder kneaded into it, and is a fiber that has ultra-fine Mt. Fuji lava powder kneaded into it, which has an excellent negative ion generating effect.

[0111] [2] Ultra-fine Mt. Fuji lava powder kneaded into fiber The fiber of this invention is referred to as fiber kneaded with ultra-fine Mt. Fuji lava powder.

[0112] The ultra-fine Mt. Fuji lava powder-incorporated fiber of the present invention is an ultra-fine Mt. Fuji lava powder-incorporated fiber in which ultra-fine Mt. Fuji lava powder is kneaded into the fiber.

[0113] The ultra-fine Mt. Fuji lava powder kneaded fiber of this invention is [1] Manufacturing method for ultra-fine Mt. Fuji lava powder kneaded fiber It can be manufactured by

[0114] The details of the ultra-fine Mt. Fuji lava powder kneaded fiber of this invention are as follows: [1] Manufacturing method for ultra-fine Mt. Fuji lava powder kneaded fiber The explanation in the section is adopted.

[0115] The ultra-fine Mt. Fuji lava powder has an average particle size (arithmetic mean diameter of particle size distribution) of preferably 0.1 μm to 5 μm, more preferably 0.1 μm to 3 μm, even more preferably 0.1 μm to 2 μm, particularly preferably 0.1 μm to 1 μm (about 0.7 μm), and most preferably 0.1 μm to 0.5 μm (about 0.3 μm) or about 0.1 μm to 0.3 μm.

[0116] The fiber is preferably at least one fiber selected from the group consisting of rayon, polyester, and nylon.

[0117] The ultra-fine Mt. Fuji lava powder is well kneaded into fibers (preferably rayon) by adjusting the average particle size within the above range.

[0118] The ultra-fine Mt. Fuji lava powder-infused fiber of this invention has ultra-fine Mt. Fuji lava powder kneaded into the fiber, and can effectively radiate far-infrared rays. Textile products using this fiber can effectively improve their cold protection function.

[0119] The fiber of the present invention has ultra-fine Mt. Fuji lava powder kneaded into it, and is a fiber that has ultra-fine Mt. Fuji lava powder kneaded into it, which has an excellent negative ion generating effect.

[0120] The fiber of the present invention is thus a fiber that incorporates ultra-fine Mt. Fuji lava powder, which effectively exhibits both far-infrared radiation and negative ion generation effects.

[0121] [3] Textile products The ultra-fine Mt. Fuji lava powder-incorporated fiber of the present invention is preferably rayon fiber.

[0122] In rayon fibers kneaded with ultra-fine Mt. Fuji lava powder, the ultra-fine Mt. Fuji lava powder is held firmly within the rayon fibers, making it difficult for the powder to fall off.

[0123] Unlike common synthetic fibers, rayon fiber is formed when the cellulose contained in viscose regenerates into its original fibrous state. Ultra-fine Mt. Fuji lava powder is not embedded in the fine porous structure of rayon fiber. The far-infrared radiation function of the ultra-fine Mt. Fuji lava powder is not lost during the rayon fiber manufacturing process.

[0124] When a viscose stock solution in which ultra-fine Mt. Fuji lava powder has been mixed and dispersed is spun and the ultra-fine Mt. Fuji lava powder is kneaded into rayon fibers, the ultra-fine Mt. Fuji lava powder is kneaded into the rayon fibers while being treated with acid, alkali, etc. in the spinning process. The obtained rayon fibers kneaded with ultra-fine Mt. Fuji lava powder exhibit the far-infrared radiation function of the ultra-fine Mt. Fuji lava powder.

[0125] Textile products using rayon fiber kneaded with ultra-fine Mt. Fuji lava powder can effectively improve their cold protection function.

[0126] The form of the textile product using the ultra-fine Mt. Fuji lava powder-incorporated fiber (preferably rayon fiber) is not particularly limited.

[0127] The form of the textile product is preferably a knitted fabric, a woven fabric (textile, fabric), a nonwoven fabric, etc., and the textile product is useful in the textile industry.

[0128] The form of the textile product (preferably a rayon textile product) is preferably used for products such as clothing, bedding (nightwear, etc.), bedding (sheets, pillowcases, pillows, blankets, futons, etc.), carpets, mats, etc.

[0129] When the ultra-fine Mt. Fuji lava powder-incorporated fiber (preferably rayon fiber) of this invention is used in clothing, bedding, bedding, etc., it can give far-infrared radiation properties and improve the cold protection function of clothing, bedding, bedding, etc.

[0130] When the ultra-fine Mt. Fuji lava powder-incorporated fiber (preferably rayon fiber) of this invention is used in clothing, bedding, bedding, etc., it is possible to obtain ultra-fine Mt. Fuji lava powder-incorporated fiber that exhibits the negative ion generating effect depending on the textile product such as clothing, bedding, bedding, etc. [Example]

[0131] The present invention will be specifically explained below with reference to examples and comparative examples.

[0132] The present invention is not limited to the following specific examples.

[0133] [1] Example 1 Preparation of ultra-fine Mt. Fuji lava powder (Figures 1 to 9) The Mt. Fuji lava was produced in Gotemba City, Shizuoka Prefecture, and was cut and finished.

[0134] The Mt. Fuji lava was crushed using a two-stage crushing method, in which the lava rock was first roughly crushed (coarse crushing), and then the coarsely crushed lava rock was finely crushed (fine crushing).

[0135] Wet pulverization was used for pulverization, and a bead mill was used for coarse pulverization and fine pulverization.

[0136] The sample was prepared by suspending the Mt. Fuji lava rock (subject) in purified water (solvent) (concentration: 20% by mass). If necessary, a dispersant (Kao Chemical, Rheodol, etc.) was used.

[0137] A two-stage process (two-stage crushing method) was used to crush the Mount Fuji lava rock.

[0138] The particle size of the ultra-fine Mt. Fuji lava powder was measured using a laser scattering particle size distribution analyzer LA-950 (LASER SCATTERING PARTICLE SIZE DISTRIBUTION ANALYZER LA-950) manufactured by HORIBA, Ltd. (HORIBA) using a laser diffraction / scattering method (Horiba LA950 for Windows [Wet] Ver. 5.00).

[0139] First stage treatment (Figures 1 to 4) The first stage of treatment involved wet grinding, suspending the Mt. Fuji lava rock in purified water, and using a dispersant (Kao Chemical, Rheodol, etc.) as needed.

[0140] In the first stage of treatment, the lava rock was coarsely crushed (agitated and crushed) using a crushing device and beads (large beads, φ0.3 mm beads) (Ashizawa Finetech Co., Ltd., Star Mill LMZ series, bead mill, LMZ2 ceramic specification).

[0141] The tank of the crushing device was filled with bead-shaped crushing media. In the crushing device, a powder slurry of Mt. Fuji lava rock (material to be crushed) was continuously introduced into the crushing chamber from the inlet while the stirring member was continuously rotating. The slurry, together with purified water (crushing media) in the crushing chamber, was subjected to strong stirring action from the stirring member's stirring blades, crushing and dispersing the Mt. Fuji lava rock in the slurry.

[0142] First, a slurry made by mixing 2 kg of Mt. Fuji lava stone powder with 8 kg of purified water was crushed to the extent that the coarse particles did not clog the screen. The crushing process was divided into two stages, a pre-stage and a post-stage, and the crushing media for the pre-stage was 0.3 mm diameter beads, which were mixed with the slurry and charged into the crushing device, and operation was started.

[0143] In the first stage treatment, pulverization (preparation of initial slurry) was carried out to the extent that the coarse particles did not clog the screen (mesh size 0.03 mm) for the subsequent second stage treatment. The pulverization in the first stage treatment was carried out at a temperature adjusted to a range of 20°C to 50°C (approximately 40°C) for a time range of approximately 30 minutes to 3 hours (approximately 1 hour to 2 hours).

[0144] The particle size change converged after 60 minutes of operation (1 hour of #1 coarse grinding, Figure 3). To proceed to the second stage, operation was continued for 90 minutes (1.5 hours of #1 coarse grinding, Figure 4) to achieve sufficient grinding.

[0145] The first stage of processing successfully produced a slurry of coarse particles of Mount Fuji lava rock (Figures 1 to 4).

[0146] The particle size was measured using a particle size distribution measuring device LA-950 manufactured by Horiba Ltd. at a room temperature of 21.8°C and a humidity of 40%.

[0147] With the #1 initial slurry (Fig. 1), the Mt. Fuji lava was successfully powdered to an average particle size of approximately 23.7 μm, a median size of approximately 14.8 μm, and a mode size of approximately 12.4 μm.

[0148] In the #1 coarse crushing for 20 minutes (Fig. 2), the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.75 μm, a median diameter of approximately 0.43 μm, and a mode diameter of approximately 0.36 μm.

[0149] After 1 hour of #1 coarse crushing (Fig. 3), the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.35 μm, a median size of approximately 0.21 μm, and a mode size of approximately 0.18 μm.

[0150] After 1.5 hours of coarse grinding (Fig. 4) using #1, the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.29 μm, a median size of approximately 0.18 μm, and a mode size of approximately 0.16 μm.

[0151] Second stage treatment (Figures 5 to 9) In the second stage treatment, wet grinding was carried out, and the slurry of coarse particles of Mt. Fuji lava stone was suspended in purified water, and a dispersant (Kao Chemical, Rheodol, etc.) was used as necessary.

[0152] In the second stage of treatment, the coarse particle slurry of Mt. Fuji lava rock obtained in the first stage of treatment was finely pulverized using a milling device and beads (small beads, φ0.1 mm beads) (Ashizawa Finetech Co., Ltd., Star Mill LMZ series, bead mill, LMZ2 ceramic specification).

[0153] Next, the grinding medium was changed to beads with a diameter of 0.1 mm, and the particles were ground to an ultrafine particle size (nanometer size).

[0154] 100 g of a dispersant, Rheodol (Kao Corporation, TW-L120), was added.

[0155] After 90 minutes (1.5 hours of #2 fine grinding, Figure 7), the particle size of the Mt. Fuji lava rock was 86.9 nm, which was sufficient to grind it into ultra-fine particles to form a colloid.

[0156] Even after the addition of the dispersant, the particle size continued to be ultra-fine-grained, and after 180 minutes of operation (3 hours of #2 fine grinding, Figure 9), the particle size reached 82 nm, and the particle size change converged.

[0157] From the obtained slurry, we were able to prepare a colloidal aqueous solution (lava colloid) containing ultrafine lava rock as the solute.

[0158] Purified water (solvent) was added to the slurry of coarse lava particles obtained in the first stage treatment to adjust the concentration. In the fine pulverization, the coarse particles were pulverized to nanometer (nm) size. In the second stage treatment, the temperature was adjusted to a range of approximately 20°C to 50°C (approximately 30°C), and the fine pulverization was carried out for a time range of approximately 30 minutes to 5 hours (approximately 1 hour to 3 hours).

[0159] The second stage of processing successfully prepared a slurry of fine particles (purified water, dispersant) and successfully prepared nanometer (nm)-sized fine particles of Mount Fuji lava rock (Figures 5 to 9).

[0160] The particle size was measured using a particle size distribution measuring device LA-950 manufactured by Horiba Ltd. at a room temperature of 21.8°C and a humidity of 40%.

[0161] In the #2 fine grinding for 30 minutes (Fig. 5), the Mt. Fuji lava was ultra-fine-grained to an average particle size of about 0.14 μm, a median size of about 0.12 μm, and a mode size of about 0.12 μm.

[0162] After 1 hour of #2 fine grinding (Fig. 6), the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.13 μm, a median diameter of approximately 0.12 μm, and a mode diameter of approximately 0.12 μm.

[0163] After 1.5 hours of #2 fine grinding (Fig. 7), the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.09 μm, a median diameter of approximately 0.09 μm, and a mode diameter of approximately 0.08 μm.

[0164] After 2 hours of #2 fine grinding (Fig. 8), the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.09 μm, a median size of approximately 0.08 μm, and a mode size of approximately 0.08 μm.

[0165] After 3 hours of #2 fine grinding (Fig. 9), the Mt. Fuji lava was ultra-fine-grained to an average particle size of approximately 0.09 μm, a median diameter of approximately 0.08 μm, and a mode diameter of approximately 0.08 μm.

[0166] By crushing Mount Fuji lava rock, we were able to prepare ultra-fine Mount Fuji lava powder with an average particle size (arithmetic mean diameter of particle size distribution) of approximately 0.1 μm to 1 μm (approximately 0.7 μm) and an ultra-fine particle size of approximately 0.1 μm to 0.5 μm (approximately 0.3 μm).

[0167] By crushing Mount Fuji lava rock, we were able to prepare ultra-fine Mount Fuji lava powder with a median diameter (d50) of approximately 0.1 μm to 0.6 μm (approximately 0.4 μm) and approximately 0.1 μm to 0.3 μm (approximately 0.2 μm and 0.1 μm).

[0168] By crushing Mount Fuji lava rock, we were able to prepare ultra-fine Mount Fuji lava powder with a mode diameter (maximum value of the distribution) of approximately 0.1 μm to 0.6 μm (approximately 0.4 μm) and 0.1 μm to 0.3 μm (approximately 0.2 μm and 0.1 μm).

[0169] The Mt. Fuji lava powder used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of the present invention is ultra-fine, and it can be evaluated that the ultra-fine Mt. Fuji lava powder can be kneaded into fiber well.

[0170] [2] Example 2 (Figs. 10 and 11) FTIR measurement of far-infrared emissivity of lava rocks from Mt. Fuji Measurement of emissivity and radiation intensity, measurement temperature: 45℃ 1. Measurement sample: Mt. Fuji lava (basalt) 2.Measurement temperature: 45℃ 3. Measurement model: Far-infrared emissivity measuring device, manufactured by JEOL, JIR-E500 4.Measurement conditions: Resolution 1 / 16cm Accumulation count: 200 Detector: MCT (HgCdTe) infrared detector 5. Measurement results of average emissivity of far-infrared rays Calculation method for average emissivity: The average value was calculated by integrating the emissivity for the wavelength ranges (1) 4 μm to 24 μm (microns) and (2) 6 μm to 14 μm (microns).

[0171] Characteristics of far-infrared rays: Infrared rays are divided into near-infrared rays with wavelengths of 0.75μm to 4.0μm (microns) and far-infrared rays with wavelengths of 4.0μm to 1,000μm (microns) depending on wavelength. Far-infrared rays have stronger penetrating power than near-infrared rays, and can reach the inside of living organisms and heat them. Objects receive energy from the outside in various forms and radiate this energy to the outside in various forms. Of these, those that radiate the most far-infrared rays are called far-infrared radiators.

[0172] Measurement of far-infrared rays: Measured using a Fourier transform infrared spectrophotometer (FTIR). The blackbody and sample are kept at the same temperature, and their radiation spectra are measured at wavelengths from 4.0 μm to 1,000 μm. The ratio of the sample's emissivity to that of the blackbody is called the emissivity.

[0173] Explanation of the two mountain-shaped curves in the graph (Fig. 10): This graph shows the state of the radiation intensity of the sample. The horizontal axis scale indicates the number of wavelengths measured (unit: μm (microns, micrometers)) up to 24 μm. The vertical axis scale indicates the intensity of radiant energy, and is expressed in units of 1 cm. 2 The radiation intensity is expressed in watts (radiance) per unit of energy. Of the two curves, the "black body" (upper curve) shows the radiant energy of a black body (an object that absorbs 100% of incident light and has the greatest energy radiation capacity). The "sample" (red curve) is a graph showing the radioactivity of the sample; the closer it is to the black body curve, the higher the radioactivity.

[0174] Explanation of the single horizontal curve graph (Figure 11): This graph shows the ratio (emissivity) of the radiant intensity of the "sample" when the radiant intensity of a blackbody is set to 100. The horizontal axis, like the radiant intensity graph, indicates the number of measured wavelengths. The vertical axis scale indicates the emissivity, expressed as a percentage.

[0175] The average emissivity of the Fuji lava rock in the wavelength range (1) 4 μm to 24 μm was 88.48%.

[0176] The average emissivity of the Fuji lava rock in the wavelength range (2) 6 μm to 14 μm was 88.75%.

[0177] The graph of far-infrared radiation energy of the Mount Fuji lava rock (sample) is close to the graph showing the radioactivity of a black body, indicating that the far-infrared radiation energy is high (Figure 10).

[0178] The graph of the far-infrared emissivity of Mount Fuji lava rock (sample) shows a high ratio compared to the radiation intensity of a black body, indicating that the far-infrared radiation energy is high (Figure 11).

[0179] By adjusting the average particle size of the ultra-fine Mt. Fuji lava powder to a range of 0.1 μm to 0.5 μm (approximately 0.3 μm) or 0.1 μm to 0.3 μm, the ultra-fine Mt. Fuji lava powder was able to effectively demonstrate far-infrared radiation function.

[0180] The Mt. Fuji lava used in the ultra-fine Mt. Fuji lava powder-incorporated fiber of this invention can be evaluated as being able to effectively exhibit far-infrared radiation function.

[0181] [3] Example 3 (Figure 12) Component analysis of Mount Fuji lava rock Test sample: Mt. Fuji lava stone Test equipment: Simple quantitative analysis using fluorescent X-rays (EP method) Test results: The results of a simple quantitative analysis (EP method) using powdered Mt. Fuji lava rocks using fluorescent X-rays are shown below (Figure 12).

[0182] The lava rocks around Mount Fuji contain elements such as Na, Mg, Si, P, K, Ca, Cr, Mn, Fe, Co, and Cu as mineral components. The main mineral component of Mount Fuji lava rocks is silicon.

[0183] [4] Example 4 (Figure 13) Negative ion measurement test of Mt. Fuji lava rock Sample: Mt. Fuji lava rock Measuring equipment: Eco Holistic Co., Ltd., Ion Counter EB-12A Measurement environment: Weather: rain, room temperature: 21℃, humidity: 57% Measurement results: Table 1 and Figure 13

[0184] [Table 1]

[0185] At the time of measurement: Average number of negative ions in the room: 43 / cc Regarding the generation of negative ions from Mt. Fuji lava stone, when a plate of Mt. Fuji lava stone was left in a room, an increase in the amount of negative ions was observed (Figure 13).

[0186] By adjusting the average particle size of the ultra-fine Mt. Fuji lava powder to a range of 0.1 μm to 0.5 μm (approximately 0.3 μm) or 0.1 μm to 0.3 μm, the ultra-fine Mt. Fuji lava powder was able to effectively generate negative ions.

[0187] By kneading ultra-fine Mt. Fuji lava powder into textile products such as clothing, towels, and masks, these textile products become textile products that have ultra-fine Mt. Fuji lava powder kneaded into them, which generates negative ions and is expected to have various health-promoting effects such as fatigue recovery and mental stability.

[0188] [5] Example 5 Manufacturing of ultra-fine Mt. Fuji lava powder-incorporated fiber (rayon fiber) The ultra-fine Mt. Fuji lava powder was dispersed in water so that the concentration was 20% by mass, to prepare an aqueous dispersion of the ultra-fine Mt. Fuji lava powder.

[0189] First, a viscose stock solution containing 8.7% by mass of cellulose, 6% by mass of sodium hydroxide, and 3.2% by mass of carbon disulfide was prepared.

[0190] Next, an aqueous dispersion of ultra-fine Mt. Fuji lava powder was added quantitatively and continuously using an injection pump so that the ratio of ultra-fine Mt. Fuji lava powder to the cellulose content was 10% by mass, and the viscose concentrate and ultra-fine Mt. Fuji lava powder were mixed uniformly.

[0191] The resulting mixture of viscose stock solution and ultra-fine Mt. Fuji lava powder was then spun into fibers by a two-bath tension spinning method using a spinneret with a nozzle diameter of 0.09 mm and 4,000 holes at a spinning speed of 50 m / min to produce a rayon filament bundle containing ultra-fine Mt. Fuji lava powder with a single fiber fineness of 5.6 dtex and an ultra-fine Mt. Fuji lava powder content of 10% by mass.

[0192] The coagulation and regeneration bath used was a Mueller bath (50°C) containing 100 g / L of sulfuric acid, 15 g / L of zinc sulfate, and 350 g / L of sodium sulfate.

[0193] The resulting ultra-fine Mt. Fuji lava powder-incorporated rayon long fiber bundle was then cut into 5 mm pieces and refined by successively subjecting it to hot water treatment, water flow treatment, and water washing treatment. After scouring, excess water was removed from the fibers using a compression roller, and the fibers were dried at 60°C for 7 hours to produce ultra-fine Mt. Fuji lava powder-incorporated rayon fiber.

[0194] The ultra-fine Mt. Fuji lava powder-incorporated fiber (rayon fiber) of this invention has the ultra-fine Mt. Fuji lava powder kneaded into the fiber well. The ultra-fine Mt. Fuji lava powder-incorporated fiber was made by adjusting the average particle size of the ultra-fine Mt. Fuji lava powder to a range of 0.1 μm to 0.5 μm (approximately 0.3 μm) or 0.1 μm to 0.3 μm, which allowed the ultra-fine Mt. Fuji lava powder to be kneaded well into the fiber.

[0195] The fiber kneaded with ultra-fine Mt. Fuji lava powder of this invention was evaluated as being able to effectively demonstrate the far-infrared radiation function of the ultra-fine Mt. Fuji lava powder. By adjusting the average particle size of the ultra-fine Mt. Fuji lava powder to a range of 0.1 μm to 0.5 μm (approximately 0.3 μm) or 0.1 μm to 0.3 μm, the fiber kneaded with ultra-fine Mt. Fuji lava powder was able to effectively demonstrate the far-infrared radiation function.

[0196] The ultra-fine Mt. Fuji lava powder-incorporated fiber of the present invention was evaluated as having a good negative ion generating effect. By adjusting the average particle size of the ultra-fine Mt. Fuji lava powder to a range of 0.1 μm to 0.5 μm (approximately 0.3 μm) or 0.1 μm to 0.3 μm, the ultra-fine Mt. Fuji lava powder was evaluated as having a good negative ion generating effect.

[0197] When textile products are made using the ultra-fine Mt. Fuji lava powder-incorporated fiber (rayon fiber) of this invention, they are evaluated to have excellent cold-weather protection properties.

[0198] [6] Example 6 Fabrication of textile products A mixture of 40% by mass of ultra-fine Mt. Fuji lava powder-infused rayon fiber with a single fiber fineness of 5.6 dtex and fiber length of 5 mm and 60% by mass of pulp was wet-formed to a paper weight of 70 g / m. 2 An ultra-fine Mt. Fuji lava powder rayon fiber product (nonwoven fabric) containing rayon fiber kneaded with the ultra-fine Mt. Fuji lava powder was obtained.

[0199] [7] Example 7 (Figure 14) Making the dough Mount Fuji lava powder was kneaded into the fibers to prepare the fabric. Fabric of this invention: Ultra-fine Mt. Fuji lava powder with an average particle size of 0.3 μm was kneaded into the fibers to prepare the fabric (30% / RB1.7dtex×38mm(T)70%). Comparative fabric: Mt. Fuji lava powder with an average particle size of 0.6 μm was kneaded into the fibers to prepare a fabric (30% / RB1.7 dtex×38 mm(T)70%).

[0200] The far-infrared spectral emissivity (spectral emissivity) of the fabric was measured. Test method: Far-infrared spectral emissivity (%) FT-IR method (former Far Infrared Association method) applied Integral measurement wavelength range 5~20μm Measurement temperature 40℃ measurement surface surface

[0201] The measurement results are shown in Figure 14. Table 2 below shows the increase / decrease rate of the far-infrared spectral emissivity of the fabric of the present invention compared to the far-infrared spectral emissivity of the fabric of the comparison product. The increase / decrease rate of the spectral emissivity of the fabric of this invention = [(Spectral emissivity of the fabric of the invention) - (Spectral emissivity of the fabric of the comparison product)] / (Spectral emissivity of the fabric of the comparison product) x 100

[0202] [Table 2]

[0203] The integrated spectral emissivity of the fabric prepared from fibers kneaded with the ultra-fine Mt. Fuji lava powder (average particle size 0.3 μm) of this invention was 2.35% higher than that of the comparison fabric (Mt. Fuji lava powder: average particle size 0.6 μm).

[0204] In the fabric of the present invention, the average particle size of the ultra-fine Mt. Fuji lava powder was adjusted to a range of about 0.1 μm to 0.5 μm (about 0.3 μm), and it was well kneaded into the fibers. In the fabric of the present invention, ultra-fine Mt. Fuji lava powder with an average particle size of about 0.1 μm to 0.5 μm (about 0.3 μm) was kneaded into the fibers, and it exhibited good far-infrared radiation function.

[0205] [8] Industrial Applicability The rayon fiber kneaded with ultra-fine Mt. Fuji lava powder of this invention effectively demonstrates the far-infrared radiation function of the ultra-fine Mt. Fuji lava powder. The fiber kneaded with ultra-fine Mt. Fuji lava powder of this invention is a fiber kneaded with ultra-fine Mt. Fuji lava powder, which effectively demonstrates the negative ion generation effect.

[0206] The textile products made from rayon fiber kneaded with the ultra-fine Mt. Fuji lava powder of this invention can effectively improve the cold protection function.

Claims

1. This rayon fiber is made by kneading ultra-fine Mt. Fuji lava powder, which has an average particle size of 0.1μm to 0.5μm, into cellulose at a rate of 5% to 40% by mass. The powder is made from Mt. Fuji lava, which has an emissivity of 80% or more of far-infrared rays in the wavelength range of 4μm to 24μm, when the radiation intensity of a black body is taken as 100.

2. Specific gravity is 2.5g / cm 3 2. The rayon fiber according to claim 1, wherein the lava stone from Mount Fuji is used.

3. A textile product comprising any one of clothing, bedding, bedding, carpets and mats, which uses the rayon fiber according to claim 1 or 2.

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