JP2008156760A - Denim - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide denim having a center part of an un-dyed warp which is easily exposed. <P>SOLUTION: This denim having warps and wefts is obtained by using entangled yarns of dyed cellulose-based fibers as the warps. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to denim that is easily discolored.

  Denim is a fabric woven from weft and dyed warp, and is used for clothing such as pants and jackets. Clothing using this denim is worn and discolored, resulting in a texture on the clothing appearance. This is one reason why apparel using denim is popular.

  The reason why the color of the denim is discolored is that the surface of the warp (usually vegetable fiber yarn such as cotton) dyed except the center is worn by contact with the outside, and the undyed center is exposed. In other words, the exposure of the center of the warp is a major factor in denim discoloration.

  A considerable period of time is required to wear until the warp center is exposed. If this period can be shortened, the texture using denim becomes easy to develop. Apparel that is easy to feel like this is desired by consumers, and denim that can achieve this is desired.

  An object of this invention is to provide the denim which the center part which is not dye | stained of warp is easy to expose.

  The present invention is a denim having warps and wefts, wherein the warps are entangled yarns of cellulosic fibers dyed.

  In order to make the color tone of the denim appearance before and after color fading uniform, it is preferable that the entanglement in the warp yarn is continuous. The warp may be entangled yarn dyed with a vat dye, and the cellulosic fiber may be cotton and / or rayon.

  This invention is the clothing manufactured using the said denim.

  According to the denim according to the present invention in which the entangled yarn of the cellulosic fiber dyed is used as the warp, not only the surface wear but also the undyed center portion of the warp is exposed not only by unraveling the entangled portion, It is possible to produce clothing that is prone to causing

  The present invention will be described based on an embodiment. The denim of this embodiment is a fabric woven from warp yarns that are dyed entangled yarns and undyed weft yarns.

First, warp will be described.
The warp in this embodiment is not a twisted yarn but an entangled yarn. Here, “entanglement” refers to a state in which two or more yarn fibers are intertwined, and includes a state in which fibers are mixed. The “entangled yarn” refers to a yarn in which fibers of two or more yarns are continuously or partially entangled. Note that the denim of this embodiment in which the warp is an entangled yarn is more flexible than the denim in which the warp is a twisted yarn.

  In the entangled yarn, the center portion of each constituent yarn in the entangled yarn and the center portion of the entangled portion in the entangled yarn are not dyed, so that not only the central portion of each constituent yarn is exposed due to surface abrasion, but also the entangled portion The center of the entangled yarn is exposed by unraveling the fiber entanglement. That is, since the center portion of the entangled yarn is exposed, denim discoloration occurs early.

  Further, when the entangled yarn has an unentangled portion, the unentangled portion does not expose the center portion of the entangled yarn similar to the entangled portion. That is, a color fading difference (denim color spots) between the entangled portion and the non-entangled portion of the entangled yarn is likely to occur. The partially entangled yarn that causes such a color fading difference is arbitrarily selected according to the color fading request of the consumer.

  The entangled yarn in this embodiment may be 75 to 1000 denier, and usually 300 to 650 denier is selected.

  As the fiber of the entangled yarn, one type or two or more types of cellulosic fibers that can be dyed with a general indigo dye or a sulfur dye as a dye for dyeing a denim warp are used. This cellulosic fiber is a fiber composed of cellulose and / or cellulose acetate. Examples of cellulosic fibers include natural cellulose fibers such as cotton; regenerated cellulose fibers such as cupra, rayon, lyocell, polynosic, and semi-synthetic fibers such as acetate. Usually, cotton and / or rayon may be used.

  The warp yarn of this embodiment can be manufactured by manufacturing the entangled yarn and then dyeing the entangled yarn.

  The entangled yarn is manufactured by injecting air from the opposing air injection port and passing two or more same or different fiber yarns once or twice through the intersecting portion of the injected air. At this time, the yarn which is continuously or partially entangled can be arbitrarily manufactured by jetting air continuously or intermittently.

  In dyeing the entangled yarn, a method of leaving a non-dyed portion at the center of the warp is employed. As a dyeing method therefor, a method using a known rope dyeing machine, slasher dyeing machine, or loop dyeing machine can be employed. Among these dyeing methods, a method using a rope dyeing machine excellent in efficiency for dyeing a large amount of warp yarn is preferable. The method using a rope dyeing machine is a method in which several hundred warps converged in a rope shape are sequentially passed through a plurality of dyeing tanks (dye baths). The dye is exposed to air as the warp moves through each dyeing tank, resulting in oxidative color development.

  As dyes used in dyeing entangled yarn, vat dyes or sulfur dyes may be used. As vat dyes, indigo dyes, anthraquinone dyes, and the like are known, and vat dyes used are brown dyes (for example, CIVat Brown) and gray dyes (for example, CIVat). Black) and a dye that develops an indigo color, which is a highly demanded denim color (for example, CIVat Blue and CI Reduced Vat Blue). On the other hand, the sulfur dye is a dye produced by heating aminophenol, indophenol or the like with sulfur or alkali sulfide, and examples thereof include C.I.Sulphur Red and C.I.Sulphur Blue.

Next, the weft will be described.
For the weft of this embodiment, a thread conventionally used for denim is used. That is, cellulose fiber yarn such as cotton yarn; chemical fiber yarn; and the like are used. In addition, as the weft, a functional yarn may be selected according to the characteristics required of the denim (for example, when a denim excellent in stretchability is required, a spandex yarn is selected as the weft).

  The thickness of the weft will affect the color of the denim. That is, the thinner the weft, the more easily the color of the warp is reflected in the appearance color of the denim, and the thicker the weft, the lighter the appearance of the denim.

  In order to obtain the denim of this embodiment using the warp and the weft, known weaving methods such as twill, plain, and dobby are used.

  The denim of this embodiment is as described above. Like the conventionally known denim, it is possible to manufacture clothing such as pants, skirts, jackets, etc. using the denim of the present embodiment, and the manufactured clothing is easy to discolor and texture. . Further, it is optional to perform processing such as stone wash processing, bio-wash processing, bleach processing, chemical wash processing on clothing.

  As mentioned above, although this invention was demonstrated based on embodiment, the said embodiment was only the example of this invention and the content of the said embodiment is changed suitably unless it deviates from the meaning of this invention. It is possible.

Claims (5)

  A denim comprising warps and wefts, wherein the warp is a tangled cellulosic fiber dyed.   The denim according to claim 1, wherein the entanglement in the warp is continuous.   The denim according to claim 1 or 2, wherein the warp is an entangled yarn dyed with a vat dye.   The denim according to any one of claims 1 to 3, wherein the cellulosic fiber is cotton and / or rayon. The clothing manufactured using the denim in any one of Claims 1-4.