JP2006169666A - Natural bamboo fiber-containing spun yarn and woven/knitted fabric using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide natural bamboo fiber-containing spun yarn of slight environmental burden in its production process, having moderate firmness, tense texture and hemp-fashioned refreshingly cool feeling, friendly to the skin as is inherent in natural fiber, and also good in hygroscopicity, and to provide woven/knitted fabrics using the spun yarn. <P>SOLUTION: The natural bamboo fiber-containing spun yarn contains natural bamboo fiber 0.9-20.0 dtex in fineness and 20-200 mm in average length and is imparted with real twists of 200-2,000 turns/m. The spun yarn may comprise the natural bamboo fiber and another kind of fiber, which is preferably biodegradable synthetic fiber. The spun yarn is to be used in the form of a woven/knitted fabric with the same used as at least part thereof. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a spun yarn containing natural bamboo fibers and a woven or knitted fabric using the spun yarn.

  Conventionally, natural fibers have been commercialized by taking advantage of their characteristics, such as texture, moisture absorption / release properties, heat retention and gentleness to the skin. In general, cotton, hemp, wool, and silk are typical natural fibers. However, in recent years, kenaf, hemp, sugar cane, etc. are used for the purpose of reducing the burden on the environment and reusing resources. In the past, commercialization has been promoted by reusing parts that have been scrapped, taking out the fibers and turning them into fibers, using them as spinning yarns using our own spinning technology, and positioning them as various new natural fibers.

  However, none of the above-mentioned new natural fibers can produce raw materials with excellent spinnability in terms of fineness and fiber length.Therefore, it is difficult to produce spun yarns with fine counts and spun yarns with excellent degree of uniformity. The current situation is limited.

Patent Document 1 proposes bamboo rayon fibers made from bamboo. However, since this fiber is manufactured by the same method as general rayon fiber, the environmental load of the manufacturing process is large, and the drawbacks of conventional rayon fiber have not been greatly improved.
Japanese Patent No. 3448526

  The present invention solves the above problems, has a small environmental impact in the manufacturing process, has a moderate tension, waist, and a hemp-like refreshing feeling, is gentle to the skin unique to natural fibers, and has excellent moisture absorption An object of the present invention is to provide a spun yarn containing fibers and a woven or knitted fabric using the spun yarn.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor pays attention to bamboo, which is a natural raw material existing in nature, and does not chemically treat bamboo with chemicals like rayon fibers to make fibers. However, the present inventors arrived at the present invention by discovering that the bamboo itself may be finely divided into natural bamboo fibers having a specific fineness and fiber length as the spun yarn.

That is, the present invention has the following configuration.
(1) Natural bamboo fiber containing natural bamboo fiber having a fineness of 0.9 to 20.0 dtex and an average fiber length of 20 to 200 mm, and having a real twist of 200 to 2000 times / m. Including spun yarn.
(2) A spun yarn comprising a natural bamboo fiber according to (1) above, comprising natural bamboo fiber and other fibers.
(3) The spun yarn containing the natural bamboo fiber according to (2) above, wherein the other fiber is a biodegradable synthetic fiber.
(4) A woven or knitted fabric using a spun yarn containing the natural bamboo fiber according to any one of (1) to (3) as at least a part thereof.

  The spun yarn containing the natural bamboo fiber of the present invention has a small environmental load in the production process, and the woven or knitted fabric using this spun yarn at least partly has an appropriate tension, waist, and hemp-like refreshing feeling. Yes, it is kind to the skin unique to natural fibers and has excellent hygroscopicity.

  Hereinafter, the present invention will be described in detail.

  The natural bamboo fiber (hereinafter sometimes referred to as bamboo fiber) constituting the spun yarn of the present invention is not a fiber obtained by chemically treating bamboo with a chemical like bamboo rayon fiber made from bamboo. Bamboo itself is a finely divided fiber itself. Therefore, the process of manufacturing bamboo fiber is a fiber with less environmental load.

  The bamboo fiber used for obtaining the spun yarn needs to have a fineness of 0.9 to 20.0 dtex, preferably 2.0 to 10.0 dtex. In order to obtain bamboo fiber, bamboo is physically divided into fibers. Therefore, if a fiber having a fineness of less than 0.9 dtex is obtained, damage to the fiber is great, and it becomes difficult to obtain tension and stiffness unique to bamboo fiber. On the other hand, if the fineness exceeds 20.0 dtex, the feeling of coarseness increases, making it unsuitable for clothing and bedding equipment, and at the same time, spinnability is significantly reduced. Further, the average fiber length of the bamboo fibers needs to be 20 to 200 mm, preferably 30 to 150 mm. If the average fiber length is out of this range, the spinnability is lowered.

  1 and 2 are 2000 times electron microscope (SEM) photographs showing a side and a cross section of an embodiment of a bamboo fiber forming the spun yarn of the present invention. As shown in FIG. Since it has a portion in the longitudinal direction of the yarn, it is excellent in moisture absorption and desorption and light weight.

  The spun yarn of the present invention needs to be provided with an actual twist of 200 to 2000 times / m, preferably 500 to 1200 times / m. Since the spun yarn has an actual twist of 200 to 2000 times / m, the tension and waist characteristics inherent in bamboo fibers can be effectively exhibited.

  The spun yarn of the present invention may be formed only of bamboo fiber, but may be composite-spun such as blended with other fibers, and when used in combination with other fibers, bamboo fiber originally has In order to effectively exhibit the tension and waist characteristics, the bamboo fiber is preferably contained in an amount of 30% by mass or more, and preferably 50% by mass or more.

  Other fibers used in combination with bamboo fibers include natural fibers, recycled fibers, solvent-spun cellulose fibers, and synthetic fibers. Specific examples of other fibers used in combination include cotton, hemp, silk, wool, cashmere, alpaca, mohair, angola and the like for natural fibers, and viscose rayon, copper ammonia rayon, acetate and triacetate for regenerated fibers. Synthetic fibers used in combination include nylon, polyester, acrylic, and the like, but biodegradable synthetic fibers such as polylactic acid, which is a plant-derived fiber that has a low environmental load, are preferable.

  As the spinning method for obtaining the spun yarn of the present invention, cotton spinning, woolen spinning, open-end spinning, binding spinning, etc. can be applied, but when performing composite spinning such as blending with other fibers, bamboo fiber It is preferable to use one having the same average fiber length of other fibers.

  Next, the woven or knitted fabric of the present invention is obtained using at least a part of the above-described spun yarn containing bamboo fiber, and may be formed only from the spun yarn of the present invention. It may be used in combination with the strip. When used in combination with other yarns, the bamboo fiber is used in an amount of 30% by mass or more, preferably 50% by mass or more in order to effectively exhibit the tension and waist characteristics inherent to the bamboo fiber. Is preferred.

  An air jet loom, a water jet loom, a circular knitting machine, a warp knitting machine, or the like can be used for producing the woven or knitted fabric of the present invention.

Next, the present invention will be specifically described with reference to examples.
Example 1
After using bamboo fiber (fineness 4.2dtex, average fiber length 88mm) with hollow parts obtained by splitting from Chinese bamboo, it is subjected to normal woolen spinning process, and a sliver is created, and then a ring spinning machine is used. Thus, a spun yarn using 100% bamboo fiber having a wool count of 1/48 and a twist number of 820 times / m was obtained.

Next, this spun yarn was made into a tengu sliver using a 30-inch x 28 G circular knitting machine using a single yarn, and the resulting sledge machine was dyed and finished according to a conventional method and sewed on a T-shirt.
(Example 2)
A normal cotton spinning process using bamboo fibers (fineness 4.2 dtex, average fiber length 38 mm) and cotton (fineness 1.7 dtex, average fiber length 40 mm) obtained in the same manner as in Example 1 at a mass ratio of 50:50. To obtain a spun yarn containing 50 masses of bamboo fiber having an English cotton count of 30/1 and a twist number of 820 times / m.

Next, using this spun yarn, it was knitted and dyed and finished in the same manner as in Example 1 and sewed on a T-shirt.
(Example 3)
Ordinary cotton using bamboo fiber (fineness 4.2 dtex, average fiber length 38 mm) and polylactic acid fiber (fineness 1.7 dtex, average fiber length 38 mm) obtained in the same manner as in Example 1 at a mass ratio of 50:50. A spun yarn containing 50 masses of bamboo fiber having an English cotton count of 30/1 and a twist number of 820 times / m was obtained by blending in the spinning process.

Next, using this spun yarn, knitting, dyeing finishing was performed in the same manner as in Example 1, and sewing was performed on a T-shirt.
(Comparative Example 1)
Except for using viscose rayon fiber (fineness: 6.0 dtex, average fiber length: 88 mm) made from Indian bamboo, spinning, knitting, dyeing and finishing were performed in a T-shirt in the same manner as in Example 1. .
(Comparative Example 2)
Spinning, knitting, and dyeing finishing were performed in the same manner as in Example 2 except that viscose rayon fiber (fineness 6.0 dtex, average fiber length 38 mm) made from Indian bamboo was used instead of bamboo fiber. Sewn into a T-shirt.
(Comparative Example 3)
Knitted and dyed and sewed into a T-shirt in the same manner as in Example 2 except that only cotton (fineness 1.7 dtex, average fiber length 40 mm) was spun to obtain a spun yarn of 100% by weight cotton. did.

  The T-shirts obtained in Examples 1 to 3 and Comparative Examples 1 to 3 were subjected to a wearing test by 10 textile engineers. As a result, the T-shirts obtained in Examples 1 to 3 were comparative examples 1 to 3. There are tension, waist and refreshing feeling, dry feeling and lightness which are not found in knitted fabrics using conventional natural fibers and bamboo rayon fibers, and it is hard to become wrinkles and has excellent shape stability.

It is a 2000-times electron microscope (SEM) photograph which shows the side surface of one embodiment of the bamboo fiber which forms the spun yarn of this invention. It is a 2000 times the electron microscope (SEM) photograph which shows the cross section of one embodiment of the bamboo fiber which forms the spun yarn of this invention.

Claims (4)

  Spinning containing natural bamboo fiber, characterized in that it contains natural bamboo fiber with a fineness of 0.9-20.0 dtex, an average fiber length of 20-200 mm, and is given a real twist of 200-2000 times / m yarn.   2. A spun yarn comprising natural bamboo fibers according to claim 1, comprising natural bamboo fibers and other fibers.   3. The spun yarn containing natural bamboo fiber according to claim 2, wherein the other fiber is a biodegradable synthetic fiber. A woven or knitted fabric using a spun yarn containing the natural bamboo fiber according to any one of claims 1 to 3 as at least a part thereof.