JP2008214772A - Bamboo fiber woven and textile products - Google Patents

Abstract

It is a technical problem to provide a natural bamboo fiber woven or knitted fabric excellent in dyeing fastness and dyed in an arbitrary color and a fiber product using the natural bamboo fiber woven or knitted fabric.
A woven or knitted fabric using a spun yarn containing natural bamboo fibers, which is dyed with a reactive dye or a vat dye, and a textile product using the same. Examples of the textile product include casual clothing, uniform clothing, formal clothing, bedding, daily necessities, interior goods, and the like.
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Description

  The present invention relates to a woven or knitted fabric using natural bamboo fibers dyed with a specific dye, and a fiber product using the same.

  2. Description of the Related Art Conventionally, fiber products having a texture, moisture absorption / release properties, heat retention, and the like have been developed using natural fibers. Known natural fibers include cotton, hemp, wool, and silk. In recent years, spinning yarns obtained from our original spinning technology using raw materials such as kenaf, hemp, sugar cane, etc., for the purpose of reducing environmental impact and reusing resources. Are known.

  However, the above-mentioned spun yarn has a problem that product development is limited because it is very difficult to make the spun yarn thin or to increase the degree of uniformity.

On the other hand, Patent Document 1 proposes spun yarn and fiber products using natural bamboo fibers obtained by finely dividing bamboo itself. This bamboo fiber has an advantage that the environmental load during production is small because the bamboo fiber is not made into a fiber by chemical treatment with chemicals like so-called bamboo rayon fiber.
JP 2006-169666 A

  However, natural bamboo fibers generally have the disadvantage that the dye molecules are difficult to enter the fiber because the cellulose molecules are highly oriented and have high crystallinity. As a result, the woven or knitted fabric containing the bamboo fibers has a problem that it is difficult to dye them in vivid colors or dark colors and it is difficult to improve the fastness to dyeing.

  The present invention solves the above problems, and provides a natural bamboo fiber woven or knitted fabric excellent in dyeing fastness and dyed in an arbitrary color, and a fiber product using the natural bamboo fiber woven or knitted fabric. This is a major issue.

  As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that natural bamboo fiber obtained by finely dividing bamboo itself may be used for dyeing with a specific dye. Reached.

  That is, the first invention is a woven or knitted fabric using a spun yarn containing natural bamboo fibers, characterized in that the woven or knitted fabric is dyed with reactive dye or vat dye. Is.

  The second invention is summarized as a fiber product using the natural bamboo fiber woven or knitted fabric.

  According to the present invention, it is possible to provide a natural bamboo fiber woven or knitted fabric excellent in dyeing fastness and dyed in an arbitrary color. The bamboo fiber woven or knitted fabric of the present invention can be used for a wide range of applications, and can be applied not only to general clothing but also to daily goods, interior goods, and the like.

  In addition, as a dyeing method that can be employed in producing the bamboo fiber woven or knitted fabric of the present invention, a so-called pre-dyeing method or a post-dyeing method can be adopted, and among these, a continuous post-dyeing method is preferred.

  Hereinafter, the present invention will be described in detail.

  The bamboo fiber woven or knitted fabric of the present invention is a woven or knitted fabric using a spun yarn containing natural bamboo fibers.

  The natural bamboo fiber used in the present invention is obtained by splitting naturally grown bamboo such as true bamboo and scorpion bamboo. Can be granted. The single yarn fineness of the natural bamboo fiber is preferably 0.9 to 20.0 dtex, and more preferably 2.0 to 10.0 dtex. If the single yarn fineness is less than 0.9 dtex, it is not preferable because the fiber strength tends to decrease due to physical influence in the process of splitting, and the tension and waist feeling of the woven or knitted fabric also tend to decrease. On the other hand, if it exceeds 20.0 dtex, the spinnability is remarkably lowered and the texture of the woven or knitted fabric tends to be hard, which is not preferable. Moreover, as an average fiber length of a natural bamboo fiber, it is preferable that it is 20-200 mm, and it is more preferable that it is 30-150 mm. If the average fiber length is within this range, the spinnability tends to improve, which is preferable.

  The bamboo fiber woven or knitted fabric of the present invention is formed using a spun yarn containing the natural bamboo fiber. Non-natural bamboo fibers contained in the spun yarn include natural fibers such as cotton, hemp, wool, cashmere, and silk, recycled fibers such as viscose rayon, copper ammonia rayon, and solvent-spun cellulose fiber, diacetate, and triacetate. Examples include semi-synthetic fibers such as nylon, polyester, acrylic, and polyurethane. In particular, when biodegradable synthetic fibers such as plant-derived polylactic acid fibers are used, the environmental load can be suppressed. Moreover, as a form of fibers other than these natural bamboo fibers, either short fibers or long fibers may be used.

  The mass ratio of the natural bamboo fiber in the spun yarn may be arbitrary, but is generally 30% by mass or more, preferably 50% by mass or more.

  Further, the number of twists of the spun yarn is preferably 200 to 2000 times / m, and more preferably 500 to 1200 times / m. When the number of twists is within this range, it is preferable because the tension and waist feeling of the woven or knitted fabric tends to increase.

  The bamboo fiber woven or knitted fabric of the present invention is basically composed of the above-described spun yarn, but other yarns may be used in combination as necessary. As the other yarns, any yarn may be used, and spun yarns, filament yarns, false twisted yarns, air mixed yarns, covering yarns and the like made of the above-described fibers can be employed.

  The bamboo fiber woven or knitted fabric of the present invention is dyed with reactive dye or vat dye.

  A reactive dye is a dye that can form a covalent bond with a fiber molecule. On the other hand, a vat dye has two or more carbonyl groups per molecule and is insoluble in water, but becomes a water-soluble leuco salt when reduced in an alkaline bath and becomes water-soluble.

  The dyeing method is not particularly limited regardless of which dye is used. For example, a so-called dyeing method or a post-dyeing method can be employed. In the present invention, a method by post-dying is preferred, and either a batch method or a continuous method can be adopted. However, in consideration of cost, it is preferable to adopt a continuous method.

  Specifically, when a continuous method is performed using a reactive dye, a two-stage dyeing method is usually employed. First, a dyeing bath used for the first stage dyeing is prepared. In this case, it is preferable to contain 1 to 150 g / L of reactive dye as a dyeing bath, and an auxiliary agent may be included as necessary. As auxiliary agents, for example, 20 to 80 g / L of migration inhibitor such as sodium alginate and polyvinyl acetate, and 3 to 30 g / L of reduction inhibitor are preferably contained. Moreover, when desirability improvement is desired, it is preferable to contain 15 g / L or less of a penetrant together as an auxiliary agent.

  After preparing the dye bath, as the first stage dyeing, the dye bath is poured into the dye bath of the continuous dyeing machine, and the liquid temperature is set to 10 ° C. or higher. Then, the woven or knitted fabric is soaked for 0.05 to 5.00 seconds, and the knitted or knitted fabric is squeezed with a mangle at a squeezing rate of 30 to 70%. Subsequently, as intermediate drying, it is preferable to dry for 2 to 40 seconds with an infrared dryer whose surface temperature is set to 500 to 1200 ° C. to evaporate 5 to 30% by mass of moisture contained in the woven or knitted fabric. By the first stage dyeing, the dye adheres to the fiber.

  Thereafter, as preliminary drying, a dryer dryer whose room temperature is set to 30 to 150 ° C. is passed 1-3 times, and then a cylinder dryer whose surface temperature is set to 80 to 150 ° C. is passed.

  Next, the second stage dyeing is performed. In this case, it is preferable to contain 100 to 900 g / L of a sodium sulfate solution having a 40% sodium sulfate concentration and 10 to 80 g / L of soda ash, and an auxiliary may be included as necessary. As an auxiliary agent, it is good to contain 3-50 g / L of reducing inhibitors, for example. In addition, when it is desired to suppress dyeing unevenness, it is preferable to add a dispersing agent of 15 g / L or less as an auxiliary agent. In the case of deep dyeing, it is preferable to contain 3 to 30 g / L of 18% caustic soda aqueous solution in addition to the salt solution and soda ash.

  In the second stage dyeing, the woven or knitted fabric was soaked at 50 to 80 ° C. for 0.05 to 5.00 seconds using the above dye bath, and the knitted or knitted fabric was squeezed at 40 to 80% using a mangle. Thereafter, the woven or knitted fabric is steamed by introducing the woven or knitted fabric into a chamber filled with saturated steam. Steaming is preferably performed at 70 to 130 ° C. for 20 to 120 seconds. This dyeing of the second stage fixes the dye to the fiber.

  After dyeing in the second stage, the woven or knitted fabric is washed for 10 to 120 seconds using a water bath set at 10 to 80 ° C. and then neutralized. For example, hydrogen peroxide or acetic acid is used for the neutralization treatment. And the unreacted dye is removed by rewashing the woven or knitted fabric for 100 to 500 seconds using a water bath set to 40 to 98 ° C. In this case, it is preferable to contain 0.01 to 4.00 g / L of a soaping agent as a water bath used for re-washing for the purpose of improving dyeing fastness.

  After the re-washing, the bamboo fiber woven or knitted fabric of the present invention can be obtained by drying for 30 to 300 seconds using a cylinder dryer whose surface temperature is set to 80 to 150 ° C.

  On the other hand, when a continuous method is carried out using a vat dye, a two-stage dyeing method is usually employed. First, a dyeing bath used for the first stage dyeing is prepared. In this case, the dye bath preferably contains 1 to 70 g / L of vat dye, and may contain an auxiliary agent as necessary. As an auxiliary agent, it is good to contain 20-80 g / L of migration inhibitor, for example. Moreover, when desiring to improve dyeability, 20 g / L or less of at least one of an antifoaming agent, a penetrating agent, a chelating agent, a dispersing agent or a roll adhesion dye re-adhesion preventing agent is contained as an auxiliary agent. preferable.

  After preparing the dye bath, as the first stage dyeing, the dye bath is poured into the dye bath of the continuous dyeing machine, and the liquid temperature is set to 5 ° C. or higher. Then, the woven or knitted fabric is soaked for 0.05 to 5.00 seconds, and the knitted or knitted fabric is squeezed with a mangle at a squeezing rate of 30 to 70%. Subsequently, as intermediate drying, it is preferable to dry for 2 to 40 seconds with an infrared dryer whose surface temperature is set to 500 to 1200 ° C. to evaporate 5 to 30% by mass of moisture contained in the woven or knitted fabric. By the first stage dyeing, the dye adheres to the fiber.

  Thereafter, as preliminary drying, a dryer dryer whose room temperature is set to 30 to 150 ° C. is passed 1 to 3 times, and then a cylinder dryer set to 80 to 150 ° C. is passed.

  Next, the second stage dyeing is performed. As a dyeing bath in this case, it is preferable to contain 10 to 100 g / L of an 18% aqueous solution of caustic soda and hydrosulfite, respectively, and if necessary, sodium chloride may be contained in an amount of 60 g / L or less. In addition, an auxiliary may be included in this dye bath, for example, 30 g / L of an overreduction inhibitor is preferably contained. The dyeing bath used for the second stage dyeing is preferably sufficiently stirred, and is preferably stirred for 10 to 400 seconds during the preparation.

  In the second stage dyeing, the woven or knitted fabric was soaked at 5 to 50 ° C. for 0.05 to 5.00 seconds using the above dye bath, and the knitted or knitted fabric was squeezed at 40 to 80% using a mangle. Thereafter, the woven or knitted fabric is steamed by introducing the woven or knitted fabric into a chamber filled with saturated steam. Steaming is preferably performed at 70 to 130 ° C. for 20 to 120 seconds. This dyeing of the second stage fixes the dye to the fiber.

  After dyeing in the second stage, the woven or knitted fabric is washed for 10 to 120 seconds using a water bath set at 1 to 60 ° C., and then oxidized. For example, acetic acid is used for the oxidation treatment. And the unreacted dye is removed by rewashing the woven or knitted fabric for 100 to 500 seconds using a water bath set to 40 to 98 ° C. In this case, it is preferable to contain 0.01 to 4.00 g / L of a soaping agent as a water bath used for rewashing.

  After the re-washing, the bamboo fiber woven or knitted fabric of the present invention can be obtained by drying for 30 to 300 seconds using a cylinder dryer whose surface temperature is set to 80 to 150 ° C.

  The bamboo fiber woven or knitted fabric of the present invention has the above-described configuration, and when it is desired to impart desired characteristics, it may be additionally processed by known means. For example, when water absorption is desired, water absorption processing may be performed by a known means, and when flexibility is desired, flexibility processing may be performed by a known means.

  Moreover, the bamboo fiber woven or knitted fabric of the present invention can be processed into various fiber products. That is, as a textile product using the bamboo fiber woven or knitted fabric of the present invention, casual clothes such as trousers, overalls, jackets, jumpers, blousons, skirts, sportswear, school uniforms, work clothes, office uniforms, blouses, Y Uniform garments such as shirts, inner garments such as T-shirts, underwear, and socks, formal garments such as suits and dresses, pajamas, yukata, gloves, hats, and other garments, pillow covers, duvet covers, sheets, and linings Living items such as bedding, towels, handkerchiefs, wiping cloths, toilet seat covers, and interior items such as curtains, tablecloths, and wallpaper.

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

(Example 1)
A twill-textured fabric using spun yarn made of natural bamboo fibers was dyed by a method of continuous post-dying using a reactive dye to obtain a bamboo fiber woven or knitted fabric of the present invention.

  That is, first, as a dyeing bath used for the first stage dyeing, a dyeing bath containing 90 g / L of reactive dye, 60 g / L of migration inhibitor and 5 g / L of anti-reducing agent is prepared. The dye bath was poured into the dye bath and the liquid temperature was set to 40 ° C. Then, the woven fabric was dyed for 0.80 seconds, and the woven fabric was squeezed using a mangle at a drawing ratio of 62%. Next, intermediate drying was performed for 6 seconds in an infrared dryer with a surface temperature set at 780 ° C. And as preliminary drying, first, it introduce | transduces into a dryer dryer set to 100 degreeC and 130 degreeC respectively for 60 seconds, and it continues to the cylinder dryer set to 115-125 degreeC of surface temperature for 12 seconds. Introduced.

  Next, as a dyeing bath used for the second stage dyeing, 800 g / L of a sodium sulfate solution having a sodium nitrate concentration of 40%, 40 g / L of soda ash, 10 g / L of an 18% aqueous solution of caustic soda, and 10 g / L of a reduction inhibitor Using a dye bath containing 10 g / L of L and a dispersant, the fabric was dipped for 0.70 seconds at 60 ° C., and the fabric was squeezed with a mangle at a drawing rate of 76%. Thereafter, the fabric was introduced into a chamber filled with saturated steam and steamed at 102 ° C. for 45 seconds.

  The fabric was washed for 31 seconds using a water bath whose liquid temperatures were set to 40 ° C. and 60 ° C., respectively, and then the pH was adjusted to 3.6 to 4.0 using hydrogen peroxide and acetic acid. Using baths whose temperatures were set to 40 ° C. and 60 ° C., respectively, neutralization was performed for 31 seconds. Next, as re-washing, the fabric is first introduced into a bath containing 0.04 g / L of a soaping agent and the liquid temperature is set to 95 ° C. for 52 seconds, and then the water temperature is set to 95 ° C. The fabric was introduced for 155 seconds.

  After re-washing, it was passed through a cylinder drier whose surface temperature was set to 115 to 125 ° C. to obtain a bamboo fiber woven or knitted fabric of the present invention.

(Example 2)
A twill-textured fabric using spun yarn made of natural bamboo fibers was dyed by a continuous post-dyeing method using a vat dye to obtain a bamboo fiber woven or knitted fabric of the present invention.

  That is, as a dyeing bath used for the first stage dyeing, 8 g / L of vat dye, 40 g / L of migration inhibitor, 8 g / L of antifoaming agent, 2 g / L of penetrant, and chelating agent Prepare a dye bath containing 1 g / L of dispersant, 1 g / L of dispersant, and 1 g / L of roll adhesion dye anti-redeposition agent. Inject this dye bath into the dye bath of the continuous dyeing machine, and set the liquid temperature to 25 ° C. did. Then, the woven fabric was dyed for 0.80 seconds, and the woven fabric was squeezed with a mangle at a drawing rate of 58%. Next, intermediate drying was performed for 6 seconds in an infrared dryer with a surface temperature set at 780 ° C. And as preliminary drying, first, it introduce | transduces into a dryer dryer set to room temperature 100 degreeC and 130 degreeC, respectively for 60 seconds, and it is 12 in the cylinder dryer whose surface temperature was set to 115-125 degreeC continuously. Dry for 2 seconds.

  Next, as a dyeing bath used for the second stage dyeing, a dyeing bath containing 40 g / L of an 18% aqueous solution of caustic soda, 40 g / L of hydrosulfite and 30 g / L of sodium chloride is used. The fabric was dipped for 0.70 seconds at 0 ° C., and the fabric was squeezed using a mangle at a squeezing rate of 77%. The dye bath used for the second stage dyeing is agitated for 120 seconds during the preparation.

  Thereafter, the fabric was introduced into a chamber filled with saturated steam and steamed at 102 ° C. for 45 seconds.

  And after wash | cleaning a textile fabric for 31 second each using the water bath which set the liquid temperature to 30 degreeC and 40 degreeC, respectively, pH is adjusted to 3.6-4.0 using acetic acid, and liquid temperature is 40 each. Oxidation was performed for 31 seconds using a bath set at 60 ° C. Next, as a re-washing, the former is woven into the former by using a bath containing 0.04 g / L of a soaping agent and 0.02 g / L of a dyeing assistant and having liquid temperatures set at 90 ° C. and 60 ° C., respectively. After 52 seconds of introduction, the fabric was introduced to the latter for 155 seconds.

After re-washing, the surface temperature was introduced into a cylinder dryer set at 115 to 125 ° C. for 180 seconds to obtain a bamboo fiber woven or knitted fabric of the present invention.

Claims (2)

  A woven or knitted fabric using a spun yarn containing natural bamboo fibers, wherein the woven or knitted fabric is dyed with a reactive dye or a vat dye. A fiber product using the bamboo fiber woven or knitted fabric according to claim 1.