JP2009150008A - Long and short composite spun yarn and cloth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spun yarn having excellent softness and moisture absorbing and releasing property in spite of thin thickness and imparting a cloth with active warmth-keeping property and to provide a cloth produced by using the spun yarn. <P>SOLUTION: The long and short composite spun yarn is composed of a core part containing a polyester fiber capable of selectively absorbing solar light and a sheath part containing a solvent-spun cellulose fiber. The mass ratio of the solar light selective absorption polyester fiber in the spun yarn is 15-60 mass%, the mass ratio of the solvent-spun cellulose fiber in the spun yarn is 40-85 mass%, and the twist coefficient of the yarn is 3.5-4.5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a long / short composite spun yarn comprising a specific fiber, and more specifically, a novel long / short composite spun yarn capable of imparting positive heat retention and excellent texture to a fabric, and the same It relates to a fabric.

Various heat insulation materials have been proposed so far. For example, Patent Document 1 proposes a three-layer structure knitted fabric using hollow fibers.
Japanese Patent No. 3880320

  In the above knitted fabric, heat retention can be realized by forming an air layer in the knitted fabric, but it is inferior in terms of heat storage and has a three-layer structure, so that a thick feeling is expressed, and in the underwear field There is a problem that it is difficult to apply.

  The object of the present invention is to solve the above-mentioned problems of the prior art, and although it is thin, it has excellent softness and moisture absorption and desorption properties and can also impart positive heat retention to the fabric. An object of the present invention is to provide a spun yarn and a fabric using the spun yarn.

  The present invention solves such problems, and is a long / short composite spun yarn comprising a core portion including a sunlight selective absorption type polyester fiber and a sheath portion including a solvent-spun cellulose fiber, and the spun yarn The mass ratio of the sunlight selective absorption type polyester fiber occupying in the fiber is 15 to 60% by mass, the mass ratio of the solvent-spun cellulose fiber in the spun yarn is 40 to 85% by mass, and the twisting factor is 3 The gist of the present invention is a long and short composite spun yarn characterized by being in the range of 5 to 4.5, and further a fabric formed using such a long and short composite spun yarn.

  According to the present invention, a spun yarn that is excellent in moisture absorption and release properties as well as softness and can impart positive heat retention properties to the fabric despite being thin, and a fabric using the spun yarn, Can be provided.

  Hereinafter, the present invention will be described in detail.

  The long and short composite spun yarn of the present invention is formed using specific fibers. That is, the long / short composite spun yarn of the present invention is a long / short composite spun yarn comprising a core portion containing a selective solar absorption type polyester fiber and a sheath portion containing a solvent-spun cellulose fiber.

  The solar-absorbing polyester fiber in the present invention refers to a long fiber yarn formed from a fiber-forming polymer in which transition metal carbide fine particles having a light-absorbing heat conversion function are kneaded. The light absorption heat conversion function refers to a function of absorbing light energy such as visible light and near infrared light, converting the energy into heat energy, and radiating it.

  Examples of the fiber-forming polymer in the present invention include polyamide polymers represented by nylon 6 and nylon 66, polyester polymers represented by polyethylene terephthalate, polyolefin polymers represented by polyethylene and polypropylene, and polyacrylonitrile polymers. Polyvinyl alcohol polymer, polyvinyl chloride polymer and the like can be used. In the present invention, these polymers may be used not only as homopolymers but also as copolymers if necessary.

  As the yarn form of the sunlight selective absorption type polyester fiber in the present invention, any of flat yarns, false twisted yarns and mixed yarns can be adopted. From the viewpoint of moisture diffusibility and stretchability, false twist processing Yarn can be preferably employed. This is because false twisted yarns are generally excellent in bulkiness and can widen the fiber gap in the yarn.

  A commercially available false twisting machine can be used for false twisting of the yarn, and general conditions can be applied mutatis mutandis as false twisting conditions. For example, when a polyester polymer is used as the fiber-forming polymer, the twist number T (t / m) is preferably 3000 / D ≦ T ≦ 3500 / D (D: total fineness (dtex) of supplied yarn), heater As temperature, 180-220 degreeC is preferable. At this time, the number of heaters to be used is not particularly limited, and may be appropriately determined in consideration of the quality of the processed yarn.

  Further, the total fineness of the sunlight selective absorption type polyester fiber is not particularly limited, but is preferably 33 to 167 dtx in consideration of the thickness and basis weight of the fabric.

  On the other hand, the solvent-spun cellulose fiber in the present invention is obtained by spinning a spinning stock solution obtained by dissolving pulp in a specific solvent by a specific means. Specifically, the pulp was dissolved in a solvent such as N-methylmorpholine-N-oxide, dimethyl sulfoxide, N-methylpiperidine-N-oxide, dimethylacetamide, filtered to remove impurities, and the obtained spinning The fiber can be obtained by dry spinning or wet spinning the stock solution.

  In the present invention, considering the texture of the finally obtained fabric, it is preferable that the single yarn fineness of the solvent-spun cellulose fiber is 1.0 to 4.0 dtex. In consideration of the texture of the fabric and the process passability of the finally obtained spun yarn, the solvent-spun cellulose fiber is preferably used in a short fiber bundle state. Therefore, after spinning the fiber, the fiber is cut into a predetermined length. A preferable single fiber length is 30.0 to 60.0 mm.

  The long and short composite spun yarn of the present invention is a spun yarn using the above-mentioned sunlight selective absorption type polyester fiber and solvent-spun cellulose fiber. The spun yarn of the present invention has a so-called core-sheath structure, and in consideration of the texture and heat retention of the fabric, only the sunlight-selective absorption type polyester fiber is used for the core, and only the solvent-spun cellulose fiber is used. It is most preferable to form the sheath portion by use, but other fibers may be contained in the core and the sheath portion as long as the effects of the present invention are not impaired.

  Here, examples of other fibers include natural fibers such as cotton, hemp, and wool, regenerated fibers such as rayon and polynosic, and synthetic fibers such as polyester, acrylic, nylon, and polyurethane.

  However, in the present invention, in consideration of the texture and heat retention of the fabric, the mass ratio of the sunlight selective absorption type polyester fiber occupying in the spun yarn is 15 to 60% by mass, and the solvent occupying in the spun yarn The mass ratio of the spun cellulose fiber needs to be 40 to 85 mass%. When the mass ratio of the sunlight selective absorption type polyester fiber is less than 15 mass% (or the mass ratio of the solvent-spun cellulose fiber exceeds 85 mass%), the fabric cannot exhibit sufficient heat retention. On the other hand, if the mass ratio of the sunlight selective absorption type polyester fiber exceeds 60 mass% (or the mass ratio of the solvent-spun cellulose fiber is less than 40 mass%), sufficient softness and moisture absorption and desorption can be imparted to the fabric. Disappear.

  In addition, the twist coefficient of the spun yarn needs to be 3.5 to 4.5. The twist coefficient is calculated by the following formula: A = T / N (A: twist coefficient, T: number of twists (t / 2.54 cm), N: thickness (English cotton count)) When the twist coefficient is less than 3.5, the core part and the sheath part are peeled off, and when the twist coefficient exceeds 4.5, the yarn becomes coarse or the fabric is inclined.

  Furthermore, the thickness of the spun yarn is not particularly limited, but 30 to 60 (English cotton count) is preferable in consideration of the thickness and weight of the fabric.

  The spun yarn of the present invention has the above-described configuration, and is used in combination with a single yarn, two twin yarns, three twin yarns or other arbitrary yarns.

  In the present invention, by using such spun yarn, a novel fabric having positive heat retention and excellent texture can be obtained. In addition, the fabric here refers to weft knitting, warp knitting, woven fabric, and non-woven fabric. After forming the fabric, it is dyed or attached as necessary. The fabric of the present invention is particularly suitable for skin clothing.

  Next, means for obtaining the spun yarn of the present invention will be described.

  The spun yarn of the present invention can basically be produced according to the ring spinning method. Specifically, a fiber bundle containing solvent-spun cellulose fibers is first supplied to a back roller in a ring spinning machine, and then the fiber bundle is supplied to a front roller while drafting, and a sunlight selective absorption type polyester fiber is also supplied. Are simultaneously fed to the front roller, and after both are superposed, they are twisted at a twisting factor of 3.5 to 4.5.

  Next, the present invention will be specifically described with reference to examples.

Example 1
First, a wooly processed yarn 56dtex24f composed of a sunlight selective absorption type polyester fiber and a coarse yarn composed of a solvent-spun cellulose fiber having a single yarn fineness of 1.3 dtx and a single fiber length of 38 mm were prepared. Next, these two yarns are introduced into a ring spinning machine, with a sunlight selective absorption type polyester fiber in the core and a solvent-spun cellulose fiber in the sheath, with a thickness of 40 (English cotton count) ), A long / short composite spun yarn having a twist coefficient of 3.9 and a core / sheath mass ratio of 40/60 was produced.

  Next, a smooth knitted fabric was knitted using the above-mentioned long / short composite spun yarn with a double knit machine “LPJ-H type (trade name)” manufactured by Fukuhara Seiki Co., Ltd. (pot system 76 cm, needle density 24 gauge). After knitting, refining, dyeing and finishing were set according to a known method to obtain the fabric of the present invention.

(Comparative Example 1)
The spun yarn and the yarn were treated in the same manner as in Example 1 except that a wooly processed yarn 56dtex24f composed of a fiber using only a polyethylene terephthalate polymer was used instead of the woolly processed yarn 56dtex24f composed of a sunlight selective absorption type polyester fiber A fabric was obtained.

(Comparative Example 2)
A wooly processed yarn 167dtx48f composed of fibers using only a polyethylene terephthalate polymer was prepared.

  For the three fabrics obtained above, the texture, hygroscopicity, and heat retention were relatively evaluated. The texture and hygroscopicity are determined by sensory evaluation, and the heat retention is performed in a room maintained at a constant temperature and humidity at a room temperature of 20 ° C. and a humidity of 65%. Thermoviewer JTG-4200 (manufactured by JEOL Ltd., infrared sensor) Was used to measure the surface temperature of the fabric when a photographic 100 W white light source was irradiated as an energy source.

According to this, the fabric according to Example 1 was superior to the other fabrics in all three performances. On the other hand, the knitted fabric according to Comparative Example 1 was superior in texture and hygroscopicity, but was inferior to the fabric according to Example 1 in terms of heat retention, and the fabric according to Comparative Example 1 had all three performance examples. It was inferior to 1.

Claims (2)

  A long / short composite spun yarn comprising a core portion containing a selective sunlight-absorbing polyester fiber and a sheath portion containing a solvent-spun cellulose fiber, and the mass ratio of the selective-absorption-type polyester fiber in the spun yarn is 15 Long and short composite spinning, characterized in that the mass ratio of the solvent-spun cellulose fiber in the spun yarn is 40 to 85% by mass, and the twist coefficient is 3.5 to 4.5. yarn. A fabric comprising the long and short composite spun yarn according to claim 1.