JP2009001927A - Blended yarn for converting light into heat and exothermic fabric using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a warm material utilizing sunshine and a fabric that uses the warm material, has excellent moisture retaining properties and proper moisture absorbing and releasing properties, is light and easily controls a touch. <P>SOLUTION: The blended yarn for converting light into heat is obtained by adding and mixing 1-10 pts.wt. of a polyester cotton containing 0.1-5 wt.% of bamboo charcoal having a particle diameter of ≤10 μm to 100 pts.wt. of mixed cotton of 20-50 wt.% of a cellulose-based fiber cotton e.g. rayon and 80-50 wt.% of an acrylic cotton and spinning the mixed cotton. The exothermic fabric is obtained from the blended yarn. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a light-exothermic blended yarn containing polyester cotton containing bamboo charcoal, and an exothermic fabric using the same.

Conventionally, as a method of improving the heat retention of textile products such as clothes, the heat insulation of the fabric is increased by increasing the fabric thickness, the fabric texture and mesh are increased, and the heat inside the body is released. It was common to avoid it. In addition, fiber products having improved heat retention by forming an air layer in hollow portions such as hollow fibers have been developed. All of these methods use the heat retention effect by preventing the heat of the body or the like covered with the textile product from escaping to the outside, and a positive heat generation effect cannot be expected.

On the other hand, an attempt has been made to obtain heat generation and heat storage effects by absorbing sunlight, converting it into heat, and dissipating it into the clothes. For example, a method has been proposed in which an infrared absorbent is dispersed or fixed to a fiber product to selectively absorb light in the infrared region and obtain a fiber product having an effect of storing heat therein (for example, Patent Documents 1 to 3). 4).
JP-A-8-3870 JP-A-9-255890 Japanese Patent Laid-Open No. 11-131376 JP 2004-149931 A

Moreover, in order to obtain the fiber product which has a heat_generation | fever and a thermal storage effect, what utilized the moisture absorption / release property of the fiber is proposed (for example, refer patent documents 5-7). Patent Document 5 discloses blended yarns of acrylate-based moisture-absorbing / releasing exothermic fibers and polyester fibers, and Patent Document 6 discloses animal fibers such as wool, hydrophobic synthetic fibers such as polyester, and acrylic moisture-absorbing / releasing properties. A blended yarn composed of exothermic fibers is disclosed. However, textile products used as clothing may be required not only for exothermic properties but also for texture, moisture absorption, moderate lightness, etc., and conventionally proposed products do not necessarily satisfy all conditions. It was not a thing.
JP 2001-254240 A Japanese Patent Laid-Open No. 2004-300584 JP 2004-115952 A

The present invention provides a warm material using sunlight, and uses it to provide a fabric that is excellent in heat retention, has moderate moisture absorption and desorption, and is light and easy to adjust the texture. It is intended to do.

According to the first aspect of the present invention, bamboo charcoal having a particle size of 10 μm or less is added to 100 parts by weight of mixed cotton of 20 to 50% by weight of cellulosic fiber cotton and 80 to 50% by weight of acrylic cotton. It is a blended yarn that converts light obtained by adding and mixing 1 to 10 parts by weight of polyester cotton containing 1 to 5% by weight and converting it into heat.

The invention according to claim 2 is the blended yarn for converting light into heat according to claim 1, wherein the cotton of the cellulosic fiber is rayon cotton.

The invention described in claim 3 is an exothermic fabric using a blended yarn that converts the light described in claim 1 or 2 into heat.

According to the present invention, a warm blended yarn using sunlight is provided. Since the main component of the blended yarn is acrylic cotton, which is a synthetic fiber, the fineness can be freely changed, and the texture can be easily adjusted. Heat retention can also be imparted by selecting a modified cross-section yarn of acrylic fiber. Furthermore, it is possible to create a light and warm fabric by using acrylic cotton having a light specific gravity.
Moreover, since cellulosic fibers such as rayon cotton are used in combination as the blended yarn, it has moderate moisture absorption and desorption.

The blended yarn of the present invention is based on 100 parts by weight of mixed cotton of 20 to 50% by weight, preferably 35 to 45% by weight of cellulosic fiber and 80 to 50% by weight, preferably 65 to 55% by weight of acrylic cotton. 1-10 parts by weight of polyester cotton containing 0.1 to 5% by weight, preferably 0.2 to 0.5% by weight of bamboo charcoal having a particle size of 10 μm or less, preferably 1 μm or less, It was obtained by spinning. When the amount of each cotton to be blended is out of the above range, the objects and effects of the present invention are not sufficiently exhibited. Polyester cotton containing bamboo charcoal exhibits the effect of converting light such as sunlight into heat.

In the present invention, the cellulosic fiber cotton means cellulosic fiber staple fibers (short fibers) such as cotton, hemp, rayon, cupra and acetate. Of these, rayon cotton is preferred. Acrylic cotton means short fibers of acrylic fibers obtained by various methods, the main component of which is a acrylonitrile monomer alone or a polymer composed of a copolymer of this and other monomers.

Another embodiment of the present invention is an exothermic fabric using a blended yarn that converts light into heat. Examples of the exothermic fabric using the blended yarn include woven fabrics, knitted fabrics, and nonwoven fabrics. However, as long as the characteristics of the present invention are not impaired, other fibers and yarns are used in combination, spinning, fine spinning, twisting, It may be a woven fabric, a knitted fabric, a non-woven fabric or the like obtained by means such as knit.

The polyester cotton containing bamboo charcoal used in the present invention is a polyester resin such as polyethylene terephthalate, which is obtained by carbonizing bamboo by an ordinary charcoal production method and pulverizing it into a fine powder having a particle size of 10 μm or less. (Polymer) is added and mixed, and the resulting mixture is melt-spun by a conventional method. The method of mixing bamboo charcoal with polyester resin is to first make a master chip of polyester containing bamboo charcoal in high concentration and mix this with polyester resin, or directly mix bamboo charcoal and polyester resin. There may be. The addition and mixing amount of polyester cotton containing bamboo charcoal is 1 to 10 parts by weight, preferably 5 to 8 parts by weight, based on 100 parts by weight of mixed cotton of cellulose fiber cotton and acrylic cotton.

The blended yarn of the present invention or the exothermic fabric obtained using the same is a warm material using sunlight, such as a jacket, trousers, trainer, sweater, slacks, skirt, underwear, lining, duvet side, cushion, chair It is used for linings, socks, gloves, mufflers, hats, etc.

(1) Production of bamboo charcoal-containing master chip Bamboo charcoal obtained by a conventional method was made into a fine powder having an average particle size of about 100 nm. 3% by weight (based on the total weight) of this bamboo charcoal fine powder was added to and mixed with polyethylene terephthalate chips to produce master chips.

(2) Production of bamboo charcoal-containing polyester cotton Polyester cotton having a single yarn denier of 1.0 dtex and a cut length of 35 mm was produced by the usual melt spinning and drawing method using 110 kg of the master chip and 1000 kg of the polyethylene terephthalate chip. The bamboo charcoal content in the obtained bamboo charcoal-containing polyester cotton was 0.3% by weight.

(3) Manufacture of spun yarn using bamboo charcoal-containing polyester cotton 5% by weight of the bamboo charcoal-containing polyester cotton, 35% by weight of rayon cotton (0.9 dtex × 38 mm), and 60% by weight of acrylic cotton (0.8 dtex × 38 mm) %, And was spun by a conventional method to obtain a spun yarn of the present invention (cotton count 24).

Using the spun yarn, a needle-drawn smooth fabric having a basis weight of 245 g / m ² was produced. The knitted fabric thus obtained had the performances shown in Table 1 (Refrump Irradiation Test) and Table 2 (Thermography Test). As a comparative product, a knitted fabric having the same structure obtained from a blended yarn of 40% by weight of rayon cotton and 60% by weight of acrylic cotton was used. It can be seen that the knitted fabric of the present invention containing bamboo charcoal quickly converts sunlight into heat and raises the temperature in the fiber.

The tests in Table 1 were conducted under the following conditions.
Temperature measurement conditions: A thermocouple was inserted between two test cloths, and the temperature rise when irradiated with a reflex lamp under the following conditions was measured.
Use lamp: PRF100V500W (flat) Distance between Toshiba fabric and lamp: 50cm
Irradiation surface: Front irradiation time: 20 minutes Measurement environment: 20 ° C x 65% RH

The tests in Table 2 were conducted under the following conditions.
Temperature measurement conditions: A reflex lamp is irradiated from the sample surface under the following conditions. The surface temperature of the back of the sample (opposite to light irradiation) when this system reaches thermal equilibrium is measured by thermography.
Use lamp: Approximately 70V
Irradiation distance: about 75cm
Measurement environment: 20 ° C x 65% RH

Claims (3)

1 to 10 polyester cotton containing 0.1 to 5% by weight of bamboo charcoal having a particle size of 10 μm or less with respect to 100 parts by weight of mixed cotton of 20 to 50% by weight of cellulose fiber cotton and 80 to 50% by weight of acrylic cotton A blended yarn that converts light obtained by adding and mixing parts by weight and spinning into heat. 2. The blended yarn for converting light into heat according to claim 1, wherein the cellulosic fiber cotton is rayon cotton. An exothermic fabric using a blended yarn for converting light according to claim 1 or 2 into heat.