WO2019245093A1 - Cool-feeling spun yarn comprising nylon fibers and cool-feeling fabric - Google Patents

Abstract

The present invention relates to a cool-feeling spun yarn and a cool-feeling fabric manufactured using the spun yarn, wherein the spun yarn is obtained by spinning a circular cross-sectional, cool-feeling functional nylon short fiber containing aluminum nitride (AIN), a quick-drying short fiber having a modified cross-section, and an absorbent cellulose short fiber in mixture, and thus the spun yarn has cool-feeling functionality and sweat-absorbing and quick-drying properties. Through the combination of a cool-feeling function by the circular cross-sectional, cool-feeling nylon fiber, a sweat-absorbing function by the cellulose fiber, and a quick-drying function by the modified cross-sectional, general nylon fiber, the cool-feeling spun yarn and the cool-feeling fabric manufactured using the spun yarn, according to the present invention, can cool down the skin and promptly release sweat produced from the human body when in contact into the skin, and thus can give a pleasant and refreshing feeling to the skin.

Description

Cool yarns and fabrics containing nylon fibers

The present invention is a cold spinning yarn having a cold-sensing functional nylon short fiber having a circular cross section including aluminum nitride (AlN), a fast-drying nylon short fiber having a heteromorphic cross section, and an absorbent cellulose short fiber by mixing and spun It relates to a cold fabric produced using the yarn.

As the standard of living improves, the number of people who enjoy sports or leisure activities is increasing, and as a result, the interest in new touch textile materials is increasing, especially in light and breathable materials. Clothing material having a sweat-absorbent quick-drying to absorb and dry has been developed.

In general, synthetic fibers such as nylon and polyester, which are mainly used as fabrics for sportswear, have a disadvantage in that they do not absorb sweat when worn as a garment because of their absorptive properties.

In order to solve this problem, a method of imparting moisture permeability to exhaust sweat generated in the human body has been applied to the synthetic fiber fabric by adding a polyurethane resin or the like to the fabric by coating or laminating. In case of excessive occurrence in a short time, the breathability alone can not satisfy the comfort of the human body.

Cellulose-based materials such as hemp, cotton, and cupra have excellent hygroscopicity and are very comfortable when sweat occurs.However, hemp has a disadvantage in that it is hard to clean due to its coarse feel, high cost, and high wrinkles. Because it is excellent and inexpensive, it is widely used in underwear, shirts, pants, etc., but it keeps the absorbed sweat as it is, and the smell of sweat causes a bad feeling and causes discomfort.

In addition, the cellulose-based material has a property of transmitting ultraviolet and infrared rays, so when the outdoor activity is worn in a state of wearing, body temperature may increase and skin damage may occur, and it retains absorbed sweat and thus maintains sticky feeling or cooling after exercise. The cold sweat makes you feel uncomfortable.

As such, in the manufacture of summer clothing or sportswear, the simple functional material that improves breathability and lightness or improves moisture permeability and absorption for the purpose of refreshing the skin simply does not meet the requirements of modern people. There is a demand for the development of a functional material that has a high cold sensitivity and sweat absorption rate, and a quick-drying quick drying property.

Accordingly, Korean Patent Publication No. 1630277 proposes a functional fabric having a sense of coldness of contact and absorption of coldness by weaving after weaving triacetate and sweat-absorbing fast drying yarn.

The triacetate is soft to the touch and excellent in cooling characteristics to give a cold feeling to the fabric, and the sweat-absorbent quick-drying yarn is composed of a sectional cross-section of polyester-based, polypropylene-based or polyamide-based synthetic fibers to absorb coldness by forming spaces between fibers. By having the fabric exhibit a feeling of contact and absorption.

However, triacetate has the disadvantages of low water absorption, easy to be wrinkled, stiff and expensive, and the deformed cross section decreases the channel expressing capillary phenomenon due to the reduction of voids during twisting or combusting. There is a problem.

In addition, Korean Patent Publication No. 1613533 uses a cross-section nylon filament as a warp yarn, and draws a weft yarn of draw texture yarn (DTY) made of the release cross-section nylon filament and draw texture yarn made of ordinary nylon filament. A cold sensing excellent in the used cold sensing sustainability has been proposed.

The release cross-section nylon filament is a spinning of a masterbatch chip in which high thermal conductivity materials (MgO, Al ₂ O ₃ , Si ₃ N ₄ , TiN, BN, AlN, ZrC, TiC, SiC) melt-kneaded and dispersed in a nylon resin When contacting human skin, heat is rapidly discharged to the outside for excellent contact cooling. Weft yarn is made by twisting DTY to make the thread surface as uniform as possible to minimize the irregularities of the fabric. By contacting, the effect of improving the heat dissipation can be obtained.

However, even if the inclined deformed section nylon filament contains high thermal conductivity material, the deformed section yarn has a smaller area of contact with the skin than the general yarn, so that the heat dissipates to the outside through the nylon filament of the deformed section. In addition, the sweat absorbing quick-drying performance is degraded by the yarn, and the sweat is not smoothly discharged. In addition, the nylon material has a lower thermal conductivity than the polyester material, so that the cooling effect due to skin contact is not satisfactory compared to the polyester fiber.

The present invention is to solve the above problems, to satisfy both the cold feeling functionality and quick-drying quick-drying, to provide a yarn manufactured by using the yarn and the yarn that can give a refreshing feeling and comfort even after human activity.

In order to solve the above problems, the present invention is 20 to 50% by weight of a cold nylon nylon fiber of a circular cross-section consisting of 0.1 to 5.0% by weight of aluminum nitride and the remaining amount of nylon resin; 10 to 40% by weight of normal nylon short fibers of the release cross-section; And 40 to 70% by weight of cellulose short fibers; provides a cold spun yarn comprising a.

In this case, the cold feeling nylon short fiber is preferably the aluminum nitride powder in which the hydrophobically modified particle surface is mixed and dispersed in the nylon resin, the modification of the aluminum nitride containing aluminum nitride powder in a concentration of 0.5 to 3.0% by weight of oleic acid It is more preferably made by wet grinding with dried ethanol solution and drying and then heating in a nitrogen atmosphere at a temperature of 800 ~ 1200 ℃ for 3 to 7 hours, 1 to 5 parts by weight of calcium carbonate to 100 parts by weight of the wet-pulverized aluminum nitride Most preferably.

In addition, the cellulose short fibers are preferably short fibers of cotton yarn, lyocell or rayon.

In addition, the cold persimmon nylon short fiber is preferably 0.5 to 5.0% by weight of boron nitride, 0.1 to 0.5% by weight of titanium dioxide or both are mixed and dispersed in the nylon resin, the titanium dioxide is 10 to 20% by weight of lower alcohol, Preparing a mixed liquid by mixing 10-20 wt% of higher alcohol, 30-40 wt% of water, and 30-40 wt% of an organic solvent; Preparing a stirred solution by adding titanium dioxide nano powder to the mixed solution and stirring; Irradiating 20-30 Hz ultrasonic waves to the stirred solution for 25 to 35 minutes; Filtering the stirring solution irradiated with the ultrasonic wave to remove the mixed solution; Drying the titanium dioxide nanopowder from which the mixed solution is removed; And drying the dried titanium dioxide nanopowder at a temperature of 400 to 500 ° C. for 10 to 15 hours in an inert gas environment.

In addition, the general nylon short fibers are preferably a coating of 2,5-bis (5-t-butylbenzoxazol-2-yl) thiophene on the surface, and silver powder, zinc oxide powder or both are nylon It is preferable to mix and disperse 0.5-3.0 weight% in resin.

In addition, the present invention provides a cold fabric fabric produced by the above method.

The cold persimmon spun yarn according to the present invention and the cold persimmon fabric manufactured using the same are combined with the cold perspiration function by the cold persimmon nylon yarn of the circular cross section, the sweat perspiration function by the cellulose fiber, and the quick drying function by the general nylon yarn of the release cross section, and contact with skin. Cool and quick discharge of sweat from the human body can give a pleasant and refreshing feeling to the skin.

The present invention is to produce a nylon filament of circular cross section by spinning a nylon resin containing aluminum nitride with a general spinneret, and to produce a general nylon filament of a cross-section by spinning the general nylon resin into a spinneret of a release cross section, They are prepared by forming a single fiber (stable fiber) and mixed spinning with cellulose short fibers to produce a cold persimmon yarn that satisfies both the cold sense functionality and the quick drying performance, and manufactures a cold persimmon fabric of woven fabric, knit fabric or nonwoven fabric using the cold persimmon yarn. do.

Aluminum nitride has a theoretical thermal conductivity (319 W / m · K) more than 10 times higher than alumina, excellent electrical insulation (9 × 10 ¹³ Ω · cm), and a coefficient of thermal expansion (4 × 10 ^-6 ) smaller than alumina and mechanical It is a light gray amorphous powder with excellent strength (430 MPa) .It has a very high thermal conductivity, so it can quickly discharge heat generated by light irradiation and heat generated by the human body to the outside of the clothing to exert a cooling effect. Since it does not inhibit the clear staining can be secured.

The aluminum nitride is mixed with a resin to make a masterbatch chip, and then spun or added to a fiber spinning solution to be mixed into the fiber, and the adsorption method and padding method of adsorbing the fiber to the surface to fix it on the surface. Although there is a method of coating on the surface of the fiber, aluminum nitride is in the form of ceramic powder particles, so coating durability on the surface of the fiber may lower the washing durability.

Aluminum nitride is preferably added so as to contain 0.1 to 5.0% by weight in the nylon resin, and the content is a range in which the cooling effect is the maximum value relative to the added amount. If the temperature is less than the above range, the cooling effect is insignificant. Therefore, since the rate of increase of the cooling effect is low, it is appropriate to add in the above range in consideration of economical efficiency.

However, aluminum nitride powder is thermodynamically unstable and reacts with moisture or oxygen in the air to decompose into aluminum hydroxide (Al (OH) ₃ ) and ammonia (NH ₃ ), and when left in the air, surface oxides of about 5 to 10 nm are formed. In addition, the surface oxide forms a solid solution with aluminum nitride, causing a decrease in thermal conductivity.

In order to prevent such a problem, it is preferable to chemically stabilize the surface of the aluminum nitride powder particles by modifying them hydrophobicly, and in this way, the aluminum nitride powder is contained in a concentration of 0.5 to 3.0% by weight of oleic acid. ) Into a ball mill together with a solution, wet grinding, and dried. Then, the dried aluminum nitride powder is put into a furnace and heated to a temperature of 800 to 1200 ° C. under nitrogen atmosphere for 3 to 7 hours. Nitride.

In order to promote the nitriding reaction, it is necessary to suppress the formation of oxides during the reaction. For this purpose, it is preferable to add calcium carbonate to wet-pulverized aluminum nitride and to dry it, and then nitriding the reaction, and 100 parts by weight of aluminum nitride It is appropriate to add 1 to 5 parts by weight of standard calcium carbonate.

Nitrogen treatment of the aluminum nitride powder as described above, since the surface of the particles is modified to be hydrophobic to inhibit the decomposition of aluminum nitride or the formation of oxides on the surface of the particles, the aluminum nitride is contained during the use of the cold spun yarn and fabric of the present invention. The cold feeling effect of cold feeling nylon filament can be prevented from falling.

Nylon fiber has low hygroscopicity, suppresses germ propagation, and has excellent oil resistance and light weight, so it has high hygiene and wearing comfort when it comes into contact with skin.However, due to low hygroscopicity, static electricity is easily generated and moisture in the body is released to the outside. It makes it difficult to feel hot in summer and cold in winter.

In order to prevent such a problem, a mixture of different fibers in nylon fibers is usually used as a garment, but there are differences depending on the type of different fibers, but the physical properties and characteristics of the blend fibers are limited by differences in fineness and shrinkage of the mixed fibers. In addition, there is a concern that the quick drying property of the clothing may be lowered due to the increase in hygroscopicity and the decrease in dryness.

In the present invention to solve this problem, the general nylon filament is produced by using a cross-sectional shape, the release cross-sectional shape forms a space between each yarn in the yarn and the space absorbed by the yarn through the capillary phenomenon By forming a channel to be discharged to the outside serves as a passage to quickly discharge the absorbed moisture.

Since the cross-sectional yarns have a smaller area of contact with the skin than the general yarns of circular cross-sections, when the cold-feel nylon filaments containing aluminum nitride are processed into a non-cross-sectional shape, the cooling effect of dissipating heat to the outside is reduced. The filament is made into a circular cross section and the general nylon filament is made into a release cross section to smoothly absorb and discharge moisture while maintaining a cooling effect.

The release cross-section nylon filament may have a variety of shapes, such as polygonal cross, cross, star, cocoon, clover, plum or hollow, and these cross-sectional yarns may be used together with one kind or two or more kinds thereof. The cross-sectional shape of the fiber used in the invention is not limited to the kind exemplified above.

By the way, the yarn blends a cold cross-section nylon filament with a circular cross section and a general nylon filament with a cross-section, so there is a case in which sweat absorption and fast drying properties are not sufficient, and nylon fibers are weak in the sun. This may occur.

In order to solve this problem, by mixing the cellulose short fibers in the two kinds of nylon short fibers to produce a cold spun yarn, cellulose is a polymer material obtainable in abundance in nature, excellent mechanical strength, biodegradability, hygroscopicity, color development, It has many advantages such as texture.

Cellulose fibers are roughly classified into natural cellulose fibers and artificial cellulose fibers, and are representative of natural cellulose fibers such as cotton yarn and burlap, and artificial cellulose fibers such as lyocell, rayon, and acetate fiber. Among them, it is more advantageous to blend the cotton yarn, lyocell fiber or rayon yarn with high hygroscopicity with nylon.

Since the cellulose fibers have a hydroxyl group (-OH), the absorbency is high, and thus the absorbency, which is a disadvantage of the nylon fibers, can be compensated for.The cellulose fibers absorb the sweat discharged from the human body, and thus outward through the capillary phenomenon of the release cross-section nylon filament. It can be discharged quickly, giving the skin a pleasant feeling.

Cold cross-section nylon filament of circular cross section, normal nylon filament of sectional cross-section and cellulose fiber are mixed with each other as short fibers, and the mixing ratio thereof is 20 to 50:10 to 40:40 to 70% by weight Fiber: cellulose short fibers) is preferably mixed within the above range according to the use, and the mixing ratio of the cold persimmon nylon short fibers of the circular cross section and the general nylon short fibers of the release cross section is adapted to the rate of occurrence of heat and sweat generated in the human body. The mixing ratio of these discharged to the outside, and the mixing ratio of the short nylon fibers and cellulose short fibers is a range that shows the optimum absorption and quick drying properties by making a proper combination of the hygroscopic properties of the short cellulose fibers and the fast drying effect of the normal cross-sectional nylon nylon fibers. .

Functional processing to satisfy the human comfort is largely influenced by sweat absorption quick drying, absorption cold feeling, contact cold feeling, solar heat (UV) blocking, thermal conductivity processing technology, so that not only the heat and sweat emitted from the human body but also from the outside There is a need to block sunlight reaching the skin, and in the sun, infrared rays, which are hot rays, increase body temperature, and especially ultraviolet rays, which are actinic rays, cause skin damage, and consumers are interested in how to block them.

In general, nylon and cellulose fibers have a lower UV protection effect than polyester fibers, and thus a method for blocking them is required. To this end, 2,5-bis (5-t), which is an organic scintillator, is used for the general nylon filament of the release cross section. -Butyl benzoxazol-2-yl) thiophene {2,5-bis (5-t-butylbenzoxazol-2-yl) thiophene, BBOT} containing BBOT UV-blocking effect composed of nylon and cellulose fibers It is preferable to add to the yarn.

BBOT is a scintillation material used to measure radiation. It has a light absorption peak at about 390 nm and re-radiates at 450 nm to convert the light wavelength from the ultraviolet region to the visible region to block the effects of ultraviolet rays on the human body. It has a wide absorption area, no toxicity, high transparency, chemical durability, and easy processing characteristics, so it does not interfere with the transparency of the fiber and is firmly bound to the fiber.

Ultraviolet rays are absorbed by the BBOT and converted into long-wave waves, and the long-wave waves have a thermal action to raise the temperature of the fiber, so it is necessary to quickly remove heat generated by the ultraviolet light.

Therefore, it is more preferable to generate heat at the fiber surface by fixing the BBOT to the fiber surface rather than incorporating the BBOT inside the fiber manufacturing process to generate heat in the fiber, and the heat of the fiber surface is faster than the inside. It can be removed to minimize the effect of such a sunscreen mechanism on the cooling effect of the fiber.

BBOT is an organic UV absorber that is adsorbed on the fiber and firmly adhered to the surface, so it is not easily detached from the fiber by washing or the like even when coated on the surface of the fiber, and it is preferable to coat the surface of the nylon filament because it binds more firmly to the nylon filament than the cellulose fiber. In addition, the filament of the release cross section has a larger surface area than the filament of the circular cross section, and the aluminum nitride is incorporated into the cold feeling nylon filament of the circular cross section, so that the cooling effect of the cold feeling nylon filament decreases when the BBOT is coated therein. Coating BBOT on general nylon filaments is most desirable in terms of the effect of blocking UV rays, eliminating heat generated and impairing the cooling function of aluminum nitride.

In order to further improve the cooling effect and the ultraviolet ray blocking effect, boron nitride (BN) ceramic particles and / or titanium dioxide nanopowders are added to the cold cross-section nylon filaments of the circular cross section, and the heat dissipation effect by boron nitride is achieved. It is preferable to add the ultraviolet ray blocking effect by and titanium dioxide.

Boron nitride has a thermal conductivity of 300 W / m · K or more, and even when mixed with other resins, it has a thermal conductivity of 25 W / m · K or more, and is a colorless crystal having high thermal shock resistance, excellent electrical insulation, and chemical safety, and optical The heat generated by irradiation, the ultraviolet rays converted into the long wave by BBOT, and the heat generated by the human body can be quickly discharged to the outside of the clothing, increasing the cooling effect and showing little color, which does not impair transparency when applied to textiles. Therefore, clear dyeing property can be secured.

Titanium dioxide scatters ultraviolet rays and blocks it, which does not cause side effects on the skin and does not decompose into ultraviolet rays.Both titanium dioxide nano powder, which is an inorganic ultraviolet scattering agent, is contained in the cold filament nylon filament and BBOT, an organic UV absorber in general nylon filaments The inorganic titanium dioxide reflects and scatters ultraviolet rays, and the scattered ultraviolet rays are absorbed by the organic BBOT and converted into long wavelength waves, thereby effectively preventing ultraviolet rays from penetrating the skin.

However, since titanium dioxide has a hydrophilic hydroxyl group on its surface, it binds with moisture in the air, causing aggregation between particles, which causes deterioration of dispersibility in the resin. Therefore, the surface of titanium dioxide particles needs to be hydrophobicly processed. For this purpose, it is preferable to use titanium dioxide after treating it with a higher alcohol which is an aliphatic alcohol having 6 or more carbon atoms.

UV rays are classified into UV-A (320-400 nm), UV-B (280-320 nm), and UV-C (100-290 nm) depending on the length of the wavelength. ~ 400 ㎚) and UV-A II (320 ~ 340 ㎚), among which UV-C is absorbed and scattered in the ozone layer, water vapor, dust, etc. on the surface of the UV-A and UV-B harmful to the human body on the surface Since only it reaches, usually UV-A and UV-B are the blocking targets.

Titanium dioxide has excellent light activity in the ultraviolet region of UV-A II and UV-B. When titanium dioxide is treated with lower alcohol, the titanium dioxide is also sensitive to light in the UV-A I region, thus increasing the UV blocking range. As a result, treatment with higher alcohols as well as lower alcohols is also effective for sun protection.

The alcohol treatment is a mixture of high (lower) alcohol and organic solvent (water) in titanium dioxide, stirred, and then irradiated with ultrasonic waves (照射), filtered to remove alcohol and organic solvent (water) and dried to remove titanium dioxide Recover.

Ultrasonic irradiation of titanium dioxide and a higher alcohol / organic solvent mixture forms a hydrophilic hydroxyl group and a hydrophobic alkyl group on the surface of titanium dioxide, which inhibits the binding of titanium dioxide to water, and ultrasonic waves in the titanium dioxide and lower alcohol / water mixture. When irradiated with, the oxygen atom of titanium dioxide was substituted with the carbon atom of lower alcohol, and the optical activity was increased even in the wavelength region of 387 nm or more.

The organic solvent is not limited as long as it is an organic solvent capable of dissolving higher alcohols. For example, the organic solvent may be selected from hydrocarbons, alcohols, aldehydes, ethers, esters, ketones and the like.

The mixing ratio of alcohol and organic solvent (or water) is preferably 20 to 40% by weight of alcohol and 60 to 80% by weight of organic solvent (or water), and the ultrasonic irradiation preferably provides 20 to 30 Hz of ultrasonic waves for 25 to 35 minutes. Drying is possible either by natural drying or artificial drying, and the moisture is sufficiently removed.

Heat treatment may be performed to stabilize the hydrophobicity or light activity of the dried titanium dioxide, and the heat treatment is heated to a temperature of 400 ~ 500 ℃ for 10 to 15 hours in an inert gas environment to stably fix the alkyl group, carbon atoms to titanium dioxide.

Depending on the purpose, titanium dioxide may be hydrophobically treated with a higher alcohol / organic solvent, photoactively treated with a lower alcohol / water mixture, or batches of these processes may be performed in one batch. In proportion to 10 to 20% by weight of lower alcohol, 10 to 20% by weight of higher alcohol, 30 to 40% by weight of water and 30 to 40% by weight of the organic solvent and then irradiated with ultrasonic waves.

As described above, titanium dioxide nano powder, which is an inorganic ultraviolet scattering agent, is contained in the cold feeling nylon filament, and BBOT, which is an organic ultraviolet absorber, is contained in the general nylon filament, thereby providing excellent UV blocking ability, skin safety and heat dissipation effect, and an organic ultraviolet absorber. The light absorption function of the fiber can improve the UV blocking performance of the fiber by complementing each other's shortcomings and maximizing the advantages.

Since boron nitride and titanium dioxide are powder particles, it is preferable to incorporate them into the fiber together with aluminum nitride for the durability of the laundry, and after the ultraviolet rays pass through the cold nylon filament and are reflected and scattered by the titanium dioxide inside the fiber, the surface of the general nylon filament It is absorbed by BBOT and converted into long wavelength wave, and the long wavelength wave has a heat action, so heat is generated on the surface of the fiber and heat generated on the surface can be quickly removed, thus minimizing the effect of the UV blocking mechanism on the cooling effect of the fiber. Can be.

Boron nitride and titanium dioxide are preferably added so as to contain 0.5 to 5.0% by weight (boron nitride) and 0.1 to 0.5% by weight (titanium dioxide) in the nylon resin when preparing the cold-feel nylon filament, and the addition amount of boron nitride is aluminum nitride It is a range in which the cooling feeling effect is maximized in cooperation with and the addition amount of the titanium dioxide is in a range that can effectively block ultraviolet rays in cooperation with BBOT.

As described above, in the present invention, the organic fiber absorber (BBOT) and inorganic ultraviolet scattering agent (titanium dioxide) containing nylon nitride and boron nitride having high thermal conductivity in the nylon fiber and imparting the UV blocking effect are mixed to cool the fiber. By imparting function and UV blocking effect, it is effective to protect the human body and provide a pleasant feeling, especially in the hot summer season when ultraviolet rays are intense.

In order to comfort the cold persimmon yarn and the fabric, it is necessary to block bacteria that are easy to breed in a hot and humid environment. For this purpose, it is preferable to add an antimicrobial material to the cold persimmon yarn, and as the antimicrobial material, silver (Ag) powder and / or oxidation Zinc oxide powder is more preferred.

Since the antimicrobial material is in the form of particles, it is preferable to be incorporated into the fiber for durability of the laundry, and since it is sterilized by contact with bacteria, the antimicrobial material is more preferably contained in a general nylon filament having a large cross-sectional surface area. Most preferably, 0.5 to 3.0 wt% is added.

If the content of the antimicrobial material is less than 0.5% by weight, the expression of the antimicrobial function is insignificant and if the content exceeds 3.0% by weight, the fiber may be cut during spinning.

As described above, the cold persimmon spun yarn comprising the nylon fiber of the present invention and the cold persimmon fabric produced using the same are the cold perspiration function by the cold persimmon nylon yarn of the circular cross section, the quick drying function by the general nylon yarn of the cross section and the sweat perspiration by the cellulose fiber. The function can be combined to quickly discharge the cool feeling and the sweat generated in the human body to provide a pleasant and refreshing effect.

Hereinafter, the present invention will be described in more detail based on the following Examples, Comparative Examples and Test Examples.

However, the following examples are only for illustrating the present invention, and the present invention is not limited to the following examples, and may be changed to other embodiments equivalent to substitutions and equivalents without departing from the technical spirit of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

<Examples 1-3>

Nylon resin is put into the main feeder of the extruder, aluminum nitride powder is put into the side feeder and melted and mixed with each other in an extruder that is heated and operated. The melt spun at a spinning speed of 4000 m / min to prepare a cold feeling nylon filament of a circular cross section in which aluminum nitride was incorporated and dispersed in a nylon resin by 3% by weight.

In addition, the spinneret was replaced with a cross spinneret and spun without inserting aluminum nitride into the extruder side feeder to prepare a general nylon filament having a release cross section.

After the cold-finished nylon filament and the general nylon filament prepared as a short fiber, 30% by weight of cold persimmon nylon filament, 20% by weight of regular nylon short fiber and cellulose fiber cotton yarn (Example 1), lyocell fiber (Example 2) or 50% by weight of rayon yarn (Example 3) was mixed with each other to prepare a spun yarn, and then, three warp and weft yarns were used to weave three kinds of fabrics.

Comparative Example

In Example 1, after the spinning yarn was prepared using only plain nylon short fibers and cotton yarn without using the cold persimmon nylon short fibers (50% by weight of normal nylon fibers, 50% by weight cotton yarn), weaving fabrics were used.

<Test Example 1> Measurement of contact cold and hot feeling

The fabrics of Examples 1 to 3 and Comparative Examples were measured by using the Qmax method, which is a typical evaluation method for contact cooling feeling, to measure the effect of cold contact feeling by repeating 10 times, and the results are shown in Table 1 below.

The measurement of the Qmax value was performed on 20 degreeC, 65% RH, (DELTA) T = 20 degreeC using the KES-F7 (Thermo Labo II, Kato Tech, Japan) apparatus.

Measurement result of contact cold feeling (J / sec / ㎠)

Number of measurements	Example 1	Example 2	Example 3	Comparative example
One	0.376	0.385	0.386	0.239
2	0.377	0.391	0.383	0.236
3	0.377	0.400	0.382	0.234
4	0.369	0.393	0.384	0.236
5	0.372	0.390	0.388	0.236
6	0.374	0.385	0.384	0.240
7	0.373	0.396	0.384	0.237
8	0.374	0.399	0.381	0.237
9	0.374	0.394	0.382	0.237
10	0.372	0.392	0.384	0.235
Average	0.3738	0.3925	0.3838	0.2367

Contact coldness refers to a characteristic that feels cold at the moment of touching the fabric. When wearing clothes, heat transfer between the skin and the clothes occurs to feel coolness and is closely related to comfort.

The Qmax value is a result of measuring the maximum instantaneous heat absorption (Qmax) that occurs initially after contacting the heat source plate (skin temperature) higher than the surface temperature of the fabric to the fabric.The higher the heat movement, the higher the Qmax value and the more I feel cold.

As shown in Table 1, the fabric of the comparative example made of the normal nylon short fiber and cotton yarn has an average Q3 value of 0.2367 J / sec / cm 2, whereas the fabric of the example in which the cold sense nylon short fiber is mixed is 0.3738 to 0.3925 J / sec / It was measured in cm 2.

In general, the Qmax value of nylon is about 0.25 J / sec / cm 2 and the cellulose fiber varies depending on the type, but is about 0.18 to 0.22. The comparative fabric includes nylon short fibers and cotton yarn in the same weight ratio, and the spun yarn is compared with the filament yarn. Since the surface was not smooth and there were many protruding fine fibers, the contact surface was small and the Qmax value was measured the smallest.

On the other hand, in the fabric of the embodiment, aluminum nitride-containing cold persimmon nylon short fibers having high thermal conductivity are mixed, and two kinds of nylon short fibers and cellulose short fibers are mixed and spun, so that the air content in the fiber decreases as the internal voids decrease, thereby reducing heat. It is believed that the Qmax value has increased since it is delivered more quickly.

Among the examples, Example 2, which was mixed with lyocell fibers, was the smallest, and Example 1, which was mixed with cotton yarns, was the smallest. Since the hollow is formed in the center, the heat transfer rate is considered to be low.

In general, in order to impart a cold feeling property to the fiber, the cross-sectional structure of the yarn, the use of a phase-transfer material (PCM), processing of the fabric using natural materials and chemicals, etc. should be processed, but in the embodiment according to the present invention, the cross-sectional structure of the fiber It gives a sense of cooling through the change of the material, the combination of the material and the method of manufacturing, there is a useful advantage than the conventional method in terms of manufacturing cost or hygiene.

<Test Example 2> sweat absorption quick-drying analysis

In order to provide a pleasant feeling as a clothing material, not only the cooling effect upon contact with the skin, but also the quick drying function of quickly discharging the sweat emitted from the skin to the outside of the clothing is important.

Accordingly, the absorbent quick-drying performance of the fabrics prepared in Examples and Comparative Examples was measured and compared, and the absorption rate was measured by KS K 0815: 2008, 6.27.1 B method and specifically, a test piece of 20.0 × 2.5 cm in the fabric. 5 pieces were taken and fixed to a certain height with one end touching the water surface of a vessel containing distilled water at 27 ± 2 ℃. After 10 minutes, the height of water was measured and the average value was obtained.

The drying rate was measured by KS K 0815: 2008, 6.28.1 A method. Specifically, three 40 × 40 cm test pieces were taken and immersed in distilled water at 27 ± 2 ° C. to be sufficiently absorbed, and then taken out of water The average value was obtained by measuring the time until the natural drying in the standard laboratory when it is no longer dropped.

Sweat-absorbent quick-drying analysis

	Example 1	Example 2	Example 3	Comparative example
Absorption rate (mm / 10 minutes)	88	92	85	98
Drying speed (min)	55	60	52	65

Looking at the Table 2, compared to the comparative example, the Example showed a slower absorption rate and a faster drying rate. The fabric of the Comparative Example is composed of only a single-sided cross-section and cotton yarn, so that there are many voids in the fiber and the absorbency is high, and the fabric of the Example has a circular cross section. It is considered that the absorption rate is relatively low due to the mixing and spinning of nylon short fibers and cellulose short fibers of a heteromorphic cross section.

At the drying rate, the fabric of the embodiment is mixed with different kinds of fibers with different material types and thicknesses, so that the internal pores become narrower, capillary phenomenon occurs more actively, and the moisture content in the fiber is removed quickly, whereas the moisture in the fabric is quickly removed. In the case of the comparative example, the nylon fiber of the release cross-section is a lot of moisture discharge proceeds quickly, but the internal porosity has a lot of moisture contained in the fabric, it is determined that the drying rate is relatively low.

In other words, for comfort when wearing clothing, not only absorbency but also quick drying is important, and it is more important to discharge quickly than to absorb sweat quickly. Therefore, it is preferable to discharge immediately as absorbing moisture as in the embodiment. Able to know.

As described above, the cold persimmon spun yarn according to the present invention, the cold persimmon nylon short fibers provide the cooling effect, the short cellulose fibers provide the water absorption, and the general nylon short fibers of the release cross-section while providing a quick drying, cold sense function and sweat-absorbent quick-drying Since it is further improved, the fabric produced by such a cold-spun yarn can cool the contact with the skin and quickly discharge the sweat generated in the human body to impart a pleasant and refreshing feeling to the human body can be usefully used in the clothing-related industry.

Claims (10)

1. 20 to 50% by weight of cold-woven nylon short fibers having a circular cross section composed of 0.1 to 5.0% by weight of aluminum nitride and the remaining amount of nylon resin;

   10 to 40% by weight of normal nylon short fibers of the release cross-section; And

   Cooling yarn containing 40 to 70% by weight of cellulose short fibers.
2. The method according to claim 1,

   The said cold feeling nylon short fiber is a cold feeling spinning yarn characterized in that the aluminum nitride powder in which the particle surface is hydrophobically modified is mixed and dispersed in a nylon resin.
3. The method according to claim 2,

   The aluminum nitride is modified by wet grinding the aluminum nitride powder with an ethanol solution containing 0.5 to 3.0% by weight of oleic acid, followed by drying for 3 to 7 hours at a temperature of 800 to 1200 ° C. in a nitrogen atmosphere. Cold spinning yarn.
4. The method according to claim 3,

   Cooling spun yarn, characterized in that for adding 1 to 5 parts by weight of calcium carbonate to 100 parts by weight of the wet-milled aluminum nitride.
5. The method according to claim 1,

   The cellulose short fibers are cotton yarn, lyocell or rayon short fibers, characterized in that the cold yarn.
6. The method according to claim 1,

   The cold persimmon nylon short fiber is boring nitride 0.5 to 5.0% by weight, titanium dioxide 0.1 to 0.5% by weight or both of them are mixed and dispersed in a nylon resin cold yarn yarn.
7. The method according to claim 6,

   The titanium dioxide,

   Preparing a mixed liquid by mixing 10-20 wt% of lower alcohol, 10-20 wt% of higher alcohol, 30-40 wt% of water, and 30-40 wt% of an organic solvent;

   Preparing a stirred solution by adding titanium dioxide nano powder to the mixed solution and stirring;

   Irradiating 20-30 Hz ultrasonic waves to the stirred solution for 25 to 35 minutes;

   Filtering the stirring solution irradiated with the ultrasonic wave to remove the mixed solution;

   Drying the titanium dioxide nanopowder from which the mixed solution is removed; And

   And cooling the dried titanium dioxide nano powder at a temperature of 400 to 500 ° C. for 10 to 15 hours in an inert gas environment.
8. The method according to claim 1,

   The general nylon short fiber is a cold-spun yarn, characterized in that the surface of the 2,5-bis (5-t- butylbenzoxazol-2-yl) thiophene coating treatment.
9. The method according to claim 1,

   The general nylon short fibers are silver powder, zinc oxide powder or both of them is 0.5 ~ 3.0 wt% mixed dispersion dispersed in a nylon resin.
10. Cold fabric produced by the method of any one of claims 1 to 9.