JP2002227055A - Black dyed fiber structure comprising polylactic acid fiber and wool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a fiber structure having an excellent black color depth. SOLUTION: This black dyed fiber structure uses a polylactic acid fiber and has <=14 L value (lightness).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a black dyed fiber structure made of polylactic acid fiber and wool having excellent black deep color.

[0002]

2. Description of the Related Art Polyester and wool woven fabrics, which combine physicochemical properties such as excellent wear resistance of polyester fibers such as excellent abrasion resistance and pleating properties with the unique delicate texture of wool, are widely used for clothing. It is used.

However, high temperature (130 to 135 ° C.) dyeing is essential to obtain black color of polyester fiber, wool is easily affected by high temperature and alkali,
Depending on the method of dyeing and finishing, the texture due to the deterioration of physical properties is significantly impaired.

[0004] Therefore, polyester fibers (130 to 13)
5 ° C.) and wool (100 ° C.) are separately dyed. In this case, although the wool is certainly not damaged and the individual fibers can be colored black, there is a problem that the processing step is very complicated.

[0005] On the other hand, in the post-dyeing method for simultaneously dyeing polyester fiber and wool, consideration is given to wool damage.
A dyeing method using a carrier (swelling agent) at 0 to 115 ° C. is used, but the dyeing temperature is low and the black coloration of the polyester fiber is not sufficient. In other words, the conventional dyeing method does not provide a fiber structure in which the polyester fibers are given a deep black color without damaging the polyester fibers and the wool fiber structure with wool.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the problems of the conventional dyeing technique and to provide a fiber structure having excellent black deep color characteristics.

[0007]

To achieve the above object, the present invention employs the following constitution. That is, the fiber structure is a fiber structure in which polylactic acid fibers and wool are mixed, and has an L value (brightness) of 14.0 or less.

Further, the above-mentioned fiber structure has a friction fastness of 3%.
It is preferable that it is higher than grade.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The polylactic acid of the present invention means a polyester containing L-lactic acid as a main component. Where L−
Lactic acid as the main component means that 60% by weight of the component is L-
It means that it is composed of lactic acid, and it may be a fatty acid polyester containing D-lactic acid in a range not exceeding 40% by weight. By using polylactic acid fibers, the deep color can be improved. This deep-colored property is caused by the fact that the light refractive index of polylactic acid fibers made of aliphatic polyester is clearly lower than that of, for example, aromatic polyester fibers.

The method for producing polylactic acid includes a two-stage lactide method in which L-lactic acid and / or D-lactic acid are used as raw materials to produce lactide, which is a cyclic dimer, followed by ring-opening polymerization. There is known a one-step direct polymerization method in which lactic acid and / or D-lactic acid are used as raw materials to directly perform dehydration condensation in a solvent. The polylactic acid used in the present invention may be a polylactic acid obtained by any method.

In order to improve physical properties such as strength, the average molecular weight of polylactic acid is preferably as high as possible, usually at least 50,000, preferably at least 100,000, more preferably at least 100,000.
0 to 300,000. When the average molecular weight is lower than 50,000, the strength physical properties of the fiber are undesirably reduced.

The polylactic acid used in the present invention preferably has a melting point of 130 ° C. or higher. 130 melting point
When the temperature is lower than 0 ° C, the quality of the product becomes extremely low, such as the occurrence of melting defects during dyeing, heat setting, and frictional heating. The melting point of the polylactic acid used in the present invention is preferably 150 ° C. or higher, and more preferably 165 ° C. or higher. Here, the melting point means a peak temperature of a melting peak obtained by DSC measurement.

Further, the polylactic acid in the present invention may be a copolymerized polylactic acid obtained by copolymerizing other components having an ester-forming ability in addition to L-lactic acid. Examples of the copolymerizable component include glycolic acid, 3-hydroxybutyric acid, 4-hydroxybutyric acid, 4-hydroxyvaleric acid, hydroxycaproic acid, and other hydroxy acids, as well as ethylene glycol, propylene glycol, butanediol, and neobentyl glycol. , Glycerin, pentaerythryl and the like, compounds having a plurality of hydroxyl groups in a molecule or derivatives thereof, adipic acid, sebacic acid, fumaric acid, terephthalic acid, 2,6-naphthalenedicarboxylic acid, 5-sodium sulfoisophthalic acid And compounds having a plurality of carboxylic acid groups in a molecular group such as, 5-tetrabutylphosphonium isophthalic acid and derivatives thereof. Also,
Aliphatic polyester polymers such as polycaprolactone, butylene succinate and polyethylene succinate can be used as internal or external plasticizers to reduce the melt viscosity.

Further, inorganic particles and organic compounds as a matting agent, a deodorant, a flame retardant, a yarn wear reducing agent, an antioxidant, and a coloring agent can be added as required.

[0015] The cross-sectional shape, surface morphology, presence or absence of crimp, crimped shape, thick and thin shape, fibrous strip and high elongation characteristics of the fiber comprising the polylactic acid of the present invention are not subject to any restrictions. Absent. However, the strength is preferably at least 2.7 g / decitex, more preferably at least 3.6 g / decitex, from the viewpoint of the spinning property and the processability. 2.7
If the amount is less than g / decitex, the rubbing action may cause fluff or yarn breakage, which is not preferable.

In addition, the range of single fiber fineness of the polylactic acid fiber of the present invention is preferably from 1.1 dtex to 11.1 dtex (0.1 to 10.0 denier), and more preferably from 1.1 dtex to 5. 6 decitex (1.0
５5.0 denier). If the single-fiber fineness is less than 1.1 dtex, it is not preferable in that the fabric for clothing has no tension, and if it exceeds 11.1 dtex, it is not preferable because the tension is too strong.

In the present invention, the fibrous structure comprising a mixed yarn of polylactic acid fiber and wool can be used as a blended yarn in which the mixing ratio of staples with wool can be freely adjusted, or a textured surface such as tightness of fabric. In consideration of the above, a woven fabric, a knitted fabric, a nonwoven fabric, or the like obtained by using a mixed yarn such as a spinning and twisting yarn of a polylactic acid multifilament yarn and a wool, and the mixing ratio thereof is not particularly limited.

The black-dyed fiber structure of the present invention is obtained by applying a fiber structure using the above-mentioned polylactic acid fiber to a black hue by using a pigment or a dye. Or a hue may be used. Further, an organic dye or the like may be contained in the fiber.

Since the black dyed fiber structure of the present invention uses the above-mentioned polylactic acid fiber, it has a lower light refractive index and better black coloring property than the aromatic polyester fiber. Further, in order to obtain deep color, it is preferable to have a polymer coating mainly composed of a fluorine-based chemical or a silicone-based compound on the surface of the fibrous structure, and plasma treatment is also effective as a means for obtaining the durability. It is.

L value (brightness) of the black dyed fiber structure of the present invention
Is a value defined by JIS, and is preferably 14.0 or less, and is 13 from the viewpoint of having excellent black deep color characteristics.
~ 14 levels are more preferred.

The friction fastness of the black dyed fiber structure of the present invention is defined in JIS L0849,
Grade or higher is preferred.

The black-dyed fiber structure of the present invention is used for school uniforms, ladies' / men's uses, Japanese clothing, lining, etc., and is particularly preferably used for black formal uses.

[0023]

EXAMPLES The present invention will be described below more specifically based on examples.

The measured values in the examples and comparative examples were obtained by the following methods. <Deep color property> For the deep color property, the lightness L value was determined using an SM color computer (manufactured by Suga Test Instruments). The L value becomes smaller as the color becomes darker, and becomes larger as the color becomes lighter. <Fastness of friction> Dryness and wetness were tested according to the method specified in JIS L0849, and the classification was performed using a gray scale for contamination.

Example 1 For both the warp and the weft, a 2/40 yarn obtained by twisting a blended No. 40 single yarn of 75% polylactic acid fiber staple (2.2 dtex x 64 mm) / 35% wool (weight ratio) was used. A surge fabric was woven at a density of 66 yarns / inch and a weft yarn density of 57 yarns / inch.

Next, relax scouring (85 ° C. × 10
Min), after intermediate setting (150 ° C. × 40 seconds), after baking, commercially available disperse dye (Dianix Black BG-FS 10% ^OWF )
1: Type 2 complex hydrochloric acid dye (Lanacet Black B 1.5y
^OWF ), (115 ° C x 40 minutes), soaping,
After washing with hot water, drying and steaming treatment (120 ° C., × 5 minutes), dyeing was performed. As shown in Table 1, black deep color,
A fiber structure having good friction fastness was obtained.

Example 2 A polylactide fiber staple (3d.times.76 to 102 mm) and a wool blend No. 1/72 were spun onto a polylactide fiber filament yarn (55.5 decitex-24 filament) core yarn for both the warp and the weft. Using sometimes spun twisted yarn wound,
The surge was woven at a warp density of 83 yarns / inch. Next, the same dyeing and finishing as in the example were performed.

As shown in Table 1, a fiber structure having both good black deep color and fastness to rubbing was obtained.

COMPARATIVE EXAMPLE 1 Both the warp and the weft were made by twisting a blended No. 40 single yarn of 75% polyethylene terephthalate fiber staple (2.2 dtex x 64 mm) / 35% wool (weight ratio).
Using No. 40, the same surge fabric as in Example 1 was trial-produced, and subjected to exactly the same dyeing and finishing treatment as in Example 1. Table 1
As shown in Examples 1, the results obtained were inferior in the deep color as compared with Examples 1 and 2.

[0030]

[Table 1]

[0031]

According to the present invention, it has excellent deep color properties,
In addition, it is possible to provide a fibrous structure having no reduction in friction fastness.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4H057 AA01 BA08 DA01 DA31 4L048 AA11 AA20 AB05 AC07 CA00 CA09 DA01

Claims (4)

[Claims] 1. A fiber structure in which a polylactic acid fiber and a wool fiber are mixed, wherein the L value (brightness) is 14.0 or less. 2. The fibrous structure according to claim 1, wherein the fiber fastness is 3 or higher. 3. The fiber structure according to claim 1, wherein the fiber structure comprises a mixed yarn of staple fiber and wool. 4. The fibrous structure according to claim 1, comprising a mixed yarn of a multifilament yarn of polylactic acid fiber and wool.