Cotton granules and fillings containing them

Abstract

The present invention relates to granular cotton containing graphene quantum dot-containing polyester fibers, and to a filling containing the same. [Solution] The granular cotton of the present invention comprises a polyester fiber containing graphene quantum dots with a particle size of 10 nm or less, and synthetic fibers other than polyester fibers.

Description

Technical Field

[0001] The present invention relates to granular cotton and stuffed products containing the same.

Background Art

[0002] Granular cotton has a bulkiness compared to general batting that is not granular, increasing the air gaps between fibers and having a heat retention effect and comfort as a stuffed product. Conventional granular cotton is mainly manufactured from polyester. For example, Patent Document 1 discloses granular cotton containing polytrimethylene terephthalate short fibers.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The granular cotton of Patent Document 1 is granular cotton manufactured from ordinary polyester and has insufficient heat retention. In addition, these materials are prone to the growth of mites and bacteria and cannot meet the need for materials having an antibacterial effect due to the increasing health awareness in recent years.

[0005] In view of the above points, the present invention provides granular cotton having functions of moisture absorption and heat generation, moisture absorption and moisture release, heat storage and heat retention, and far-infrared heat retention, having high heat retention, and at the same time having health functions such as antibacterial, antifungal, anti-mite, and deodorizing properties, and a stuffed product containing the granular cotton.

Means for Solving the Problems

[0006] To achieve the above object, the present invention provides the following means.

[0007] This invention relates to granular cotton containing graphene quantum dots with a particle size of 10 nm or less, and synthetic fibers other than polyester fibers. Preferably, the content of the graphene quantum dot-containing polyester fibers in the cotton granules is 95 to 60% by mass, and the content of the synthetic fibers in the cotton granules is 5 to 40% by mass. In the graphene quantum dot-containing polyester fiber, preferably, the graphene quantum content is 0.2% by mass or more, and the moisture retention rate of the synthetic fiber is 15% or more. The graphene quantum-containing polyester fiber is preferably a silicon-containing polyester fiber with a fineness of 7.0 dtex or less, and the fineness of the synthetic fiber is preferably 6.0 dtex or less. The synthetic fiber preferably includes at least one selected from the group consisting of acrylate fibers, modacrylic fibers, and acrylic fibers.

[0008] The present invention relates to a filling containing the above-mentioned cotton granules having a particle size of 0.3 to 1 cm. The aforementioned cotton granules are preferably beige in color. [Effects of the Invention]

[0009] The granular cotton and filling materials of the present invention are mainly used in bedding, interior goods, outdoor sleeping bags, clothing, etc., and have functions such as antibacterial, antifungal, anti-mite, deodorizing, heat retention, heat retention, moisture absorption and release, and high resilience. [Brief explanation of the drawing]

[0010] [Figure 1] This is a photograph of a filling containing cotton granules, as one embodiment of the present invention. [Figure 2] This is a close-up photograph of one of the cotton granules used in the cotton stuffing shown in Figure 1. [Modes for carrying out the invention]

[0011] The present invention will be described in more detail. Unless otherwise specified, the "~" in a numerical range indicates a range from above to below, including both values ​​at either end. Furthermore, when a numerical range is indicated, the upper and lower limits may be combined as appropriate, and the resulting numerical range is also disclosed.

[0012] <Graphene quantum dot-containing polyester fiber> The graphene quantum dot-containing polyester fiber of the present invention contains graphene quantum dots with a particle size of 10 nm or less, and preferably contains graphene quantum dots with a particle size of 5 nm or less. It is preferable that flavonoids are chemically bonded to the surface of the above graphene quantum dots.

[0013] The aforementioned polyesters include polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyethylene-2,6-naphthalate (PEN), polymethylene terephthalate (PMT), polypropylene terephthalate (PPT), polyethylene-p-oxybenzoate (PEOB), poly-1,4-cyclohexylenedimethylene terephthalate (PCT), and copolymer components such as diethylene glycol, neopentyl glycol, polyalkylene glycol, diol components, adipic acid, and seba. It contains at least one selected from the group consisting of polyesters copolymerized with dicarboxylic acid components such as tinic acid, phthalic acid, isophthalic acid, and 2,6-naphthalenedicarboxylic acid (excluding biodegradable polyesters), liquid crystal polyester, polylactic acid, polyhydroxyalkanoate, polybutylene succinate, cellulose acetate, polyvinyl alcohol, polyglycolic acid, polybutylene succinate-co-adipate, polybutylene adipate terephthalate, and polyethylene terephthalate succinate.

[0014] In the graphene quantum-containing polyester of the present invention, the content of graphene quantum dots is preferably 0.2% by mass or more, more preferably 0.2 to 1% by mass, and still more preferably 0.25 to 0.5% by mass. By setting the content of graphene quantum dots within this range, spinning becomes easier, and at the same time, functions such as heat storage and heat preservation, far-infrared heat preservation, antibacterial, antifungal, and acaricidal of graphene quantum are imparted to the polyester fiber.

[0015] The graphene quantum-containing polyester fiber of the present invention is preferably a silicon-containing polyester fiber having a fineness of 7.0 dtex or less.

[0016] <Manufacturing method of graphene quantum dots with a particle size of 10 nm or less> The manufacturing method of graphene quantum dots with a particle size of 10 nm or less according to the present invention is a first aqueous dispersion preparation step of reacting graphene oxide, hydrogen peroxide, and aqueous ammonia to prepare a first graphene quantum dot aqueous dispersion, and a reducing agent and phosphate are added to the first graphene quantum dot aqueous dispersion, irradiated with microwaves in the range of 100 to 200 °C, and a second graphene quantum dot aqueous dispersion in which graphene quantum dots with a particle size of 10 nm or less are dispersed is prepared. A second aqueous dispersion preparation step, and a freeze-drying step in which the second graphene quantum dot aqueous dispersion is freeze-dried to obtain graphene quantum dots with a particle size of 10 nm or less.

[0017] The manufacturing method of the graphene quantum dots with a particle size of 10 nm or less preferably further includes a flavonoid reaction step of mixing the second graphene quantum dot aqueous dispersion and a flavonoid, performing ultrasonic treatment at 185 to 200 °C for 2 to 5 hours, and reacting the graphene quantum dots with the flavonoid.

[0018] <Manufacturing method of graphene quantum dot-containing polyester fiber> The polyesel material is pulverized, and the powder of graphene quantum dots with a particle size of 10 nm or less and a dispersant are put into a mixer and mixed. Then, they are put into a biaxial granulator and granulated at a temperature of 155 to 285 °C to obtain a masterbatch. The above masterbatch, polyester chips, and a lubricant are mixed and melted, and the melt is sent to a spinning machine for spinning, and cooled through a spinning sleeve to obtain continuous filament fibers with a fineness of 0.5 dtex or less. The above filament fibers are cut into short fibers by a cutting device to obtain graphene quantum dot-containing polyester fibers.

[0019] The synthetic fiber of the present invention preferably uses a fiber with a moisture retention rate of 15% or more, and more preferably a fiber with a moisture retention rate of 18% or more. The synthetic fiber within this moisture retention rate range has excellent functions of moisture absorption and heat generation and moisture absorption and heat release, and also has a good deodorizing function.

[0020] The fineness of the synthetic fiber of the present invention is preferably 6.0 dtex or less.

[0021] The synthetic fiber of the present invention preferably contains at least one selected from the group consisting of acrylate fibers, modacrylic fibers, and acrylic fibers.

[0022] The granulated cotton of the present invention is preferably light beige. The stuffing of the present invention contains the above granulated cotton.

[0023] <Method for manufacturing granulated cotton> Synthetic fibers other than polyester fibers with a moisture retention rate of 15% or more are pre-opened and mixed with polyester fibers containing graphene quantum dots with a particle size of 10 nm or less, and mixed in a cotton mixing box until uniform. Then, they are put into a curling device and molded into a spherical shape to obtain a stuffing of granulated cotton.

[0024] Specifically, the method for manufacturing the granulated cotton of the present invention is as follows: An opening treatment step of opening synthetic fibers other than polyester fibers with an opener machine to obtain pre-opened synthetic fibers, A mixing step in which the previously opened synthetic fibers and graphene quantum dot-containing polyester fibers are fed into a blending machine in a predetermined ratio, and the blending time is set and the fibers are mixed, The open carding process involves performing open carding using an open carding machine, The process includes a molding step in which the uniformly mixed material is placed in a curling device to be formed into a sphere, and the time and pressure are adjusted according to the set process requirements so that the size and elasticity of the molded sphere meet the specified requirements.

[0025] The synthetic fibers of the present invention do not contain silicone. Therefore, when mixed with polyester fibers containing silicone, they do not mix uniformly, resulting in poor dispersibility during spherical molding and causing them to clump together. To overcome this problem, the manufacturing method of the present invention includes the above-mentioned pre-opening process, in which the synthetic fibers are opened beforehand. The above-mentioned pre-opening process improves the dispersibility of the synthetic fibers, making it easier to uniformly mix them with silicone-containing polyester fibers.

[0026] In the above mixing process, the mixing time is preferably in the range of 120 to 180 seconds, and more preferably 150 seconds.

[0027] The above open carding process can further improve the uniformity of the mixture of the two materials: synthetic fibers and graphene quantum dot-containing polyester fibers.

[0028] In the molding process described above, the time for curling using the curling device is preferably in the range of 2.5 to 5 minutes, and more preferably 3 minutes. By the centrifugal motion of curling, the mixed material is molded into a spherical shape, and by adjusting the pressure at the outlet of the curling device, cotton granules of different sizes can be prepared. The outlet pressure is preferably 0.3 Pa or less, and more preferably 0.15 Pa.

[0029] Through the above process, granular cotton with functions such as antibacterial, antifungal, anti-mite, deodorizing, heat retention, far-infrared heat retention, moisture absorption and heat generation, moisture absorption and release, and high resilience is prepared. [Examples]

[0030] The present invention will be described in more detail below based on examples, but the present invention is not limited to these examples.

[0031] [Example 1] <Preparation of granular cotton containing 90 parts by weight of graphene quantum dot polyester and 10 parts by weight of acrylate fibers, with a particle size of 0.3 cm> 5.1 kg of acrylate fiber (BF-24, manufactured by Qingdao Baifang Bedding Co., Ltd.) was opened using an opener machine (XXKS-100, manufactured by Qingdao Hailijia Textile Machinery Co., Ltd.) and pre-opened. A first graphene quantum dot aqueous dispersion was prepared by reacting graphene oxide, hydrogen peroxide, and aqueous ammonia. A reducing agent and phosphate were added to the first graphene quantum dot aqueous dispersion, and microwave irradiation was performed in the range of 100-200°C to prepare a second graphene quantum dot aqueous dispersion containing graphene quantum dots with a particle size of 10 nm or less. The second graphene quantum dot aqueous dispersion was mixed with a flavonoid, and sonication was performed at 185-200°C for 2-5 hours to react the graphene quantum dots with the flavonoid. After filtration and freeze-drying, graphene quantum dots with a particle size of 10 nm or less were obtained. Polyester material was pulverized to produce graphene quantum dot powder with a particle size of 10 nm or less. This powder and a dispersant were mixed in a mixer, then fed into a twin-screw granulator and granulated at a temperature of 155 to 285°C to obtain a masterbatch. The masterbatch was mixed with polyester slices and a lubricant, melted, and the molten material was sent to a spinning machine for spinning. The molten material was then cooled through a spinning sleeve to obtain continuous filament fibers with a fineness of 0.5 Dex or less. These filament fibers were cut into short fibers using a cutting device to obtain graphene quantum dot-containing polyester fibers. 5 kg of the above pre-opened acrylate fibers and 45 kg of the above graphene quantum dot-containing polyester were fed into a blending machine and mixed for 150 seconds. After mixing, open carding was performed using an open carding machine (XXSL-100, manufactured by Qingdao Hailijia Textile Machinery Co., Ltd.). The above material, uniformly mixed by open carding, was placed into a curling device. The curling time was set to 3 minutes, and the pressure at the outlet of the curling device was set to 0.15 Pa. The material was then formed into a spherical shape by centrifugal curling motion, yielding cotton granules with a particle size of 0.3 cm.

[0032] [Example 2] Preparation of granular cotton containing 85 parts by weight of graphene quantum dots in polyester and 15 parts by weight of acrylate fibers, with a particle size of 0.5 cm. 7.65 kg of acrylate fiber was opened using an opener machine (XXKS-100, manufactured by Qingdao Hailijia Textile Machinery Co., Ltd.) and pre-opened. A first graphene quantum dot aqueous dispersion was prepared by reacting graphene oxide, hydrogen peroxide, and aqueous ammonia. A reducing agent and phosphate were added to the first graphene quantum dot aqueous dispersion, and microwave irradiation was performed in the range of 100-200°C to prepare a second graphene quantum dot aqueous dispersion containing graphene quantum dots with a particle size of 10 nm or less. The second graphene quantum dot aqueous dispersion was mixed with a flavonoid, and sonication was performed at 185-200°C for 2-5 hours to react the graphene quantum dots with the flavonoid. After filtration and freeze-drying, graphene quantum dots with a particle size of 10 nm or less were obtained. Polyester material was pulverized to produce graphene quantum dot powder with a particle size of 10 nm or less. This powder and a dispersant were mixed in a mixer, then fed into a twin-screw granulator and granulated at a temperature of 155 to 285°C to obtain a masterbatch. The masterbatch was mixed with polyester slices and a lubricant, melted, and the molten material was sent to a spinning machine for spinning. The molten material was then cooled through a spinning sleeve to obtain continuous filament fibers with a fineness of 0.5 Dex or less. These filament fibers were cut into short fibers using a cutting device to obtain graphene quantum dot-containing polyester fibers. 7.5 kg of the above pre-opened acrylate fibers and 42.5 kg of the above graphene quantum dot-containing polyester were fed into a blending machine and mixed for 150 seconds. After mixing, open carding was performed using an open carding machine (XXSL-100, manufactured by Qingdao Hailijia Textile Machinery Co., Ltd.). The above material, uniformly mixed by open carding, was placed into a curling device. The curling time was set to 3 minutes, and the pressure at the outlet of the curling device was set to 0.15 Pa. The material was then formed into a spherical shape by centrifugal curling motion, yielding cotton granules with a particle size of 0.5 cm.

[0033] [Example 3] <Preparation of granular cotton containing 80 parts by weight of graphene quantum dot polyester and 20 parts by weight of acrylate fibers, with a particle size of 0.8 cm> 10.2 kg of acrylate fiber was opened using an opener machine (XXKS-100, manufactured by Qingdao Hailijia Textile Machinery Co., Ltd.) and pre-opened. A first graphene quantum dot aqueous dispersion was prepared by reacting graphene oxide, hydrogen peroxide, and aqueous ammonia. A reducing agent and phosphate were added to the first graphene quantum dot aqueous dispersion, and microwave irradiation was performed in the range of 100-200°C to prepare a second graphene quantum dot aqueous dispersion containing graphene quantum dots with a particle size of 10 nm or less. The second graphene quantum dot aqueous dispersion was mixed with a flavonoid, and sonication was performed at 185-200°C for 2-5 hours to react the graphene quantum dots with the flavonoid. After filtration and freeze-drying, graphene quantum dots with a particle size of 10 nm or less were obtained. Polyester material was pulverized to produce graphene quantum dot powder with a particle size of 10 nm or less. This powder and a dispersant were mixed in a mixer, then fed into a twin-screw granulator and granulated at a temperature of 155 to 285°C to obtain a masterbatch. The masterbatch was mixed with polyester slices and a lubricant, melted, and the molten material was sent to a spinning machine for spinning. The molten material was then cooled through a spinning sleeve to obtain continuous filament fibers with a fineness of 0.5 Dex or less. These filament fibers were cut into short fibers using a cutting device to obtain graphene quantum dot-containing polyester fibers. 10 kg of the above pre-opened acrylate fibers and 40 kg of the above graphene quantum dot-containing polyester were fed into a blending machine and mixed for 150 seconds. After mixing, open carding was performed using an open carding machine (XXSL-100, manufactured by Qingdao Hailijia Textile Machinery Co., Ltd.). The above material, uniformly mixed by open carding, was placed into a curling device. The curling time was set to 3 minutes, and the pressure at the outlet of the curling device was set to 0.15 Pa. The material was then formed into a spherical shape by centrifugal curling motion, yielding cotton granules with a particle size of 0.8 cm.

[0034] [Comparative Example 1] Granulated cotton was obtained in the same manner as in Example 1, except that the material composition of commercially available polyester fiber (ZK-690, manufactured by Yizheng Chemical Fiber Co., Ltd.) was used instead of the material composition of graphene quantum dot-containing polyester and acrylate fiber.

[0035] In the examples, various physical properties were measured or calculated as follows.

[0036] The antibacterial properties of the cotton granules produced in Examples 1-3 and Comparative Example 1 were detected according to the bacterial solution absorption method of JIS L 1902. The results are shown in Table 1.

[0037] The mite-repellent properties of the granular cotton produced in Examples 1-3 and Comparative Example 1 were detected according to the glass tube method A of JIS L 1920. The results are shown in Table 1.

[0038] The evaluation method for the moisture absorption and heat generation performance of the cotton granules produced in Examples 1-3 and Comparative Example 1 is described below. A 12cm x 12cm cotton granule sample was placed in a constant-temperature dryer and dried at 105°C for 1 hour. After complete drying, it was first left in an environment of 20°C and 5%RH humidity for 6 hours, and then left in an environment of 20°C and 65%RH humidity for 5 minutes. The change in surface temperature was measured using infrared thermography, and the temperature rise under high humidity conditions was calculated. The results are shown in Table 1.

[0039] The evaluation method for the moisture absorption and release properties of the cotton granules produced in Examples 1-3 and Comparative Example 1 is described below. A 20cm x 20cm cotton granule sample was placed in a constant-temperature dryer and dried at 105°C for 2 hours. After complete drying, it was first left in an initial environment of 30°C and 95% RH humidity for 5 hours, and then left in a later environment of 30°C and 30% RH humidity for 4 hours. The change in mass of the cotton granules over time was measured and recorded. Based on the mass of the cotton granules in the completely dried state, the difference between the moisture content absorbed in the initial environment and the moisture content released in the later environment was calculated. The results are shown in Table 1.

[0040] The heat retention performance of the granular cotton produced in Examples 1-3 and Comparative Example 1 was detected according to the constant temperature method A of JIS L 1096. The results are shown in Table 1.

[0041] The heat storage and insulation performance of the granular cotton produced in Examples 1-3 and Comparative Example 1 was detected according to the light absorption and heat retention test method of Boken Standard BQE A 036. The results are shown in Table 1.

[0042] The deodorizing properties of the cotton granules produced in Examples 1-3 and Comparative Example 1 were detected according to the deodorizing properties test method of the Japan Textile Evaluation Technology Council. The results are shown in Table 1.

[0043] The cotton granules were washed according to the standard washing method outlined in the Textile Evaluation Council's "Washing Method for SEK Mark Textile Products." Table 1 shows the results of comparing the deodorizing properties before and after washing.

[0044] [Table 1]

[0045] Table 1 shows the performance parameters of the granular cotton produced in Examples 1-3 and Comparative Example 1. As shown in Table 1, the granular cotton of the present invention was found to have an antibacterial property of 3 or higher and to have mite-resistant properties. Furthermore, the granular cotton of the present invention has good moisture absorption and heat generation properties, moisture absorption and release properties, and heat retention properties. In addition, it was found to have a deodorizing effect, maintaining good deodorizing properties even after 10 washes, and to have excellent wash resistance.

[0046] Although the present invention has been described in detail based on the above-described embodiments, these represent only a portion of the embodiments of the present invention, not all embodiments. Furthermore, other embodiments can be obtained based on these embodiments, and it should be understood that all of these embodiments fall within the scope of protection of the present invention.

Claims

1. Polyester fibers containing graphene quantum dots with a particle size of 10 nm or less, Grained cotton containing synthetic fibers other than polyester fibers.

2. The content of the graphene quantum dot-containing polyester fibers in the aforementioned cotton granules is 95 to 60% by mass. The synthetic fiber content in the cotton granules is 5 to 40% by mass. The granular cotton according to feature 1.

3. In the graphene quantum dot-containing polyester fiber, the graphene quantum content is 0.2% by mass or more. The aforementioned synthetic fiber has a moisture retention rate of 15% or more. The granular cotton according to feature 1.

4. The graphene quantum-containing polyester fiber is a silicon-containing polyester fiber with a fineness of 7.0 dtex or less. The fineness of the synthetic fiber is 6.0 dtex or less. The granular cotton according to feature 1.

5. The granular cotton according to claim 1, characterized in that the synthetic fiber includes at least one selected from the group consisting of acrylate fibers, modacrylic fibers, and acrylic fibers.

6. A filling containing cotton granules according to any one of claims 1 to 5, wherein the particle size is 0.3 to 1 cm.

7. The filling according to claim 6, characterized in that the granular cotton is beige in color.

Images