JPH11315471A - Production of knitted fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a knitted fabric highly fibrillated while having burst strength standing practical use even if being relatively thin, by enzymatic treatment and fibrillation treatment of a knitted fabric made using filament yarns prepared by double covering cellulose-based filaments as the core with synthetic fiber filaments. SOLUTION: This knitted fabric is obtained by enzymatic treatment and fibrillation treatment in dyeing process of a knitted fabric which is made using filament yarns prepared by double covering cellulose-based 60/-filaments such as of polynosic fiber as the core with two 10-30 denier monofil-aments of synthetic fiber such as polyester or nylon fiber in the twist direction opposite to the core filaments within the number of twists range of 30 to 1,000 t/m.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a knitted fabric used for clothing, which has a good touch, and has excellent properties such as strength and shrinkage.

[0002]

2. Description of the Related Art Conventionally, cellulosic fibers such as cotton and polynosic have been widely used for clothing because of their good touch and hygroscopicity. However, in recent years, the use of these cellulosic fibers has been diversified with the diversification of fashion. One example is a fibril processing method using polynosic or solvent-spun lyocell and further splitting a single cellulosic fiber to obtain a peach skin-like fabric. However, these methods of fibril processing have disadvantages such as lowering the bursting strength of the knitted fabric, making it unsuitable for practical use, fibril processing requires a long time, poor productivity, and lack of stability. ing. In order to solve this drawback, a method of increasing the use number or reducing the stitch has been implemented.

[0003]

However, the conventional method as described above has a problem that a peach skin tone fabric for clothing cannot be stably obtained with a relatively thin and lightweight knitted fabric. An object of the present invention is to solve this problem and stably provide a peach skin-like knitted fabric for clothing.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve such problems, and as a result, in order to stably obtain a peach skin-like knitted fabric, the cellulose fibers to be used must be firmly used. And found that it is important not to move against external force, and arrived at the present invention. That is, in the present invention, a knitted fabric is knitted using a double-covered yarn such that a cellulosic fiber is used as a core and two synthetic fibers are used as a sheath, and enzymatic treatment and fibril processing are performed in a subsequent dyeing process. The gist of the present invention is a method for producing a knitted fabric, which is characterized by being applied.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
The cellulosic fibers of the present invention are mainly polynosic and lyocell, and cotton and ordinary viscose rayon are excluded from the present invention because they do not fibrillate. Polyester and nylon are mainly used as synthetic fibers, and a monofilament yarn of 10 to 30 d / f is usually used for a double cover. I just need. The double cover yarn is a yarn usually produced by a method of covering a core yarn and two yarns in opposite twist directions. The features are the feeling and surface effect by reinforcing and twisting the core yarn. Twist number is 30
The normal range is from 0 to 1000 t / m. Below this, the effect is not exhibited, and above this, the effect remains unchanged. The knitted fabric referred to in the present invention includes both circular knitting (single jersey and double jersey) and warp knitting.

Next, the dyeing process will be described. The standard steps of dyeing and finishing in the present invention are “opening” → “bleaching” → “enzyme processing” → “fibrillation processing” → “dyeing” → “finishing set”. Cellulosic fibers are scoured and bleached in an "exposing" process using chlorine and hydrogen peroxide. Further, in the case of polynosic fiber or solvent-spun cellulose (lyocell) referred to in the present invention, an enzymatic treatment with cellulase or the like is carried out in order to cut the fluff on the surface of the knitted fabric.
Furthermore, in these polynosic fibers and solvent-spun cellulose (lyocell), a method of splitting (fibrillating) a single yarn to make the single yarn finer and make the touch a peach skin tone is performed. In the above dyeing and finishing step, the strength of the used cellulosic fiber decreases. One example is polynosic fiber 60 /-under the conditions of Example 1.
After the “exposed”, “enzyme processing” and “fibrillation processing” processes,
It decreased as shown in Table 1.

[0007]

[Table 1]

[0008] The drop in the strength of the yarn is linked to the drop in the burst strength of the knitted fabric, and the extreme drop may be reduced to a range that is not practical for clothing. In particular, the phenomenon is likely to occur in a thin knitted fabric. The limit of the practical use of burst strength depends on the intended use, but is 3.5 kgf / cm ² ｛P
A degree is a guideline. As shown in Table 1 above, the synthetic fiber used as the other yarn has a very small decrease in strength after the steps of "exposing", "enzyme processing" and "fibrillation processing".

[0009]

In the present invention, by double-covering the cellulosic fibers with synthetic fibers, the cellulosic fibers of the knitted fabric are fixed by the external force in the dyeing process, and the external force is concentrated on the fixing portion of the cellulosic fibers, and the fibril is fixed. Plays the role of promoting

[0010]

EXAMPLE The measurement of the bursting strength of a knitted fabric was performed according to JIS L-10.
18 was evaluated. The feeling of the knitted fabric was determined by handling (◎: good, ×: poor), and the determination of fibrillation was visually determined (◎: good, ×: poor).

Example 1 A solvent-spun lyocell 60 /-of cellulosic fiber was used as the core of the double cover yarn, and polyester 20d was used as the synthetic fiber of the sheath.
/ 1fSD yarn was used, and the used yarn was prepared at a twist number of 600 t / m. The knitting machine is a double jersey machine 24G / G × 3
Use a 3 "pot diameter, and the tissue is 250g with the punch of Fig. 1.
/ M knitted fabric was knitted. Next, this greige is called “opening”
→ "Bleaching" → "Enzyme processing" → "Fibrillation processing" →
Finished in “Dyeing” → “Finishing set” process. The conditions of the process are as follows: "Bleaching" is hydrogen peroxide 2 g / liter x 4
0 ° C x 15 minutes, "Enzyme processing" is 1.2% owf of enzyme cellulase with a liquid flow dyeing machine x 50 ° C x 60 minutes, "Fibrillation processing" is 50 ° C x 75 minutes with a tumbler machine, and "Staining" is liquid Using disperse dye and direct dye in flow dyeing machine, 125 ° C × 12
0 minutes, "Finishing set" is 160 ° C. × 30 seconds with a tenter. The obtained knitted fabric was 145 cm wide × 225 g / m.

Comparative Example 1 The other conditions were the same, and instead of the double cover, knitting and processing were performed using a lyocell 40 /-having a thickness corresponding to that of Comparative Example 1.

"Grawling machine" of Example 1 and Comparative example 1 → "Opening"
→ "Bleaching" → "Enzyme processing" → "Fibrillation processing" →
Table 2 shows the measurement results of the burst strength after the “dyeing” → “finishing set” process. The burst strength of Example 1 was clearly higher than that of Comparative Example 1, and the effect of the present invention was demonstrated.

[0014]

[Table 2] Further, as shown in Table 3, the hand feeling was soft in the examples and the fibrils were frequently generated in the examples, and the comparative examples did not occur, and the effect of the present invention was proved. .

[0015]

[Table 3]

[0016]

According to the present invention, it is possible to produce a knitted fabric having a bursting strength that can withstand practical use even with a relatively thin knitted fabric and in which fibrils are frequently generated.

[Brief description of the drawings]

FIG. 1 is a knitting structure diagram used when knitting a knitted fabric in Example 1 and Comparative Example 1.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI D06P 3/82 D06P 3/82 A D06M 9/12

Claims (1)

[Claims] A cellulosic fiber is provided on a core portion of a synthetic fiber.
A method for producing a knitted fabric, comprising knitting a knitted fabric using a double-covered yarn so that a book becomes a sheath portion, and subjecting the knitted fabric to an enzymatic treatment and a fibril processing in a subsequent dyeing process.