JPS61201056A - Double-surface reversible knitted cloth - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a double-sided reversible circular knitted fabric, more specifically, a double-sided reversible circular knitted fabric with less pilling.

(Prior Art) Sports clothing, especially training wear for school physical education, is knitted with processed polyester yarn on the front side and processed polyester yarn and polyester-cotton blend yarn or cotton yarn on the back side for the required functionality and durability. The land is overwhelmingly used. The polyester processed yarn used here has good knitting properties due to its good torque generation and unwinding properties, as well as good knitted fabric surface smoothness and appearance, and good dimensional stability of the fabric. Because it is easy to dye and process,
Generally, processed polyester yarns are used which are subjected to heat setting after false twisting to suppress torque and heat shrinkage, have low crimpability, and have excellent dimensional stability.

When sports clothing knitted with polynisdel-processed yarn is worn harshly by children in the lower grades of elementary school, the filament threads on the surface of the knitted fabric break at the buttocks and front thighs, causing fuzz. This fluff becomes tangled when worn or washed, causing pilling and a large amount of fluff, which significantly deteriorates the appearance. In order to eliminate this drawback, there are methods such as adding additional twist to the false twisted yarn to make the fibers converge, or reducing the dial and cylinder spacing of the double-sided knitting machine during knitting to knit the fabric densely. However, they all have poor texture, limit the thickness of the knitted fabric, and increase costs, making them uneconomical.

(Problems to be Solved by the Invention) The present invention is a double-sided reversible fabric that reduces the occurrence of fuzz and pilling on the surface using long fiber yarn, while not impairing the appearance or texture and having a rich fabric thickness. The aim is to obtain the nine-tenth grade.

(Means for Solving the Problems) In the present invention, at least one surface of the EM surface is made of long fiber yarn.
In the double-sided reversible circular knitted fabric, the threads that connect the front side of the knitted fabric and the back side of the silk fabric have a hot water stretch fastness of 1.
It is a double-sided reversible round silk fabric that is a long fiber processed yarn with a hot water shrinkage rate of 5 to 30% and a hot water shrinkage rate of 5 to 10%.

Here, double-sided reversible circular knitted fabric is knitted with a double-sided knitting machine, and at least one side of the fabric is knitted independently, and the two-sided weave is tucked or independently knitted. A circular knitted fabric in which one side has a tuck structure and the other side has a knit structure. In addition, a yarn forming a tuck structure or a knit structure in order to bind both sides is called a binding yarn.

In a knitted fabric in which one side of the knitted fabric is knitted with long-staple yarns, the present inventor has discovered that M7il, which is knitted with long-staple yarns,
Pilling occurs when the fabric is used. First, the filaments of the long-staple yarn break, and then the filaments of the long-staple yarn break. This causes fuzzing and building. At this time, severe abrasion during wearing causes the long-staple yarn to break. We found that the filament cracking of yarn is related to the degree of freedom of movement of long fiber yarns in loose knitted fabrics. That is, the greater the free movement of the long fiber yarns in the knitted fabric loop, the more filament cracks occur due to mutual friction between the fibers. For this reason, pilling can be prevented by fixing the loose knitted fabric made of long fiber yarns that make up the surface of the silk fabric and increasing the convergence of the yarns.

The double-sided reversible nine-flat fabric of the present invention was created in view of this point, and the double-sided reversible nine-flat fabric IIi! ! As a binding yarn that connects the ground surface and the back side of the knitted fabric, it has a hot water elongation fastness of 15 to 30% and a hot water shrinkage rate of 5 to 10%.
A processed yarn with high shrinkage and high crimpability is used.

By using this yarn, after knitting, the front and back surfaces of the knitted fabric are firmly integrated through the crimping and contraction of the binding yarn during processes such as relaxing dyeing, while maintaining its thickness and soft texture. As a result, the loop is fixed and the thread converges due to the entanglement effect of the binding thread, so even if the surface is abraded due to severe wear, the free momentum of the thread within the loop is kept small, resulting in filament (filament), etc. This phenomenon does not occur, and therefore, no pilling occurs.

In the present invention, it is necessary to provide the above-mentioned binding yarn with a long-fiber processed yarn having a hot water stretch fastness of 15 to 30% as measured by the method described below. If the hot water stretch fastness is less than 15%,
The fabric is thin, giving it a paper-like feel, and the threads are thin, so the long fibers in the surface structure move easily, making it easy for fuzzing and pilling to occur. Also, 30
If it exceeds %, industrial production becomes difficult and the texture becomes thick and felt, making it difficult to obtain a desirable texture. Further, the binding yarn needs to be a long fiber processed yarn having a hot water shrinkage rate of 5 to 10% as measured by the method described below. When the hot water shrinkage rate is less than 5%, the fabric becomes thinner and the threads are thinner, so the long fiber threads in the surface structure move more easily and fuzzing and pilling are more likely to occur. Moreover, if the hot water shrinkage rate exceeds 10%, the texture of the fabric becomes hard, which is not good. Further, the binding yarn needs to be a processed yarn from the viewpoint of high shrinkage and high crimp development. The fibers constituting the long fiber yarn may be of any type.

Further, the knitting yarns forming the front and back sides of the double-sided reversible nine-woven fabric are appropriately determined from the yarns forming the normal double-sided reversible circular knitted fabric. Moreover, the knitting structure of the knitted fabric may be any one.

A yarn that satisfies the above-mentioned hot water stretch fastness and hot water shrinkage rate is produced, for example, as follows.

In a one-stage false twisting machine with a heater length of 90 cIn, highly oriented undrawn polyester yarn was set, a predetermined draw ratio determined by the spinning speed was set, and the heater temperature was 210 to 22 cm.
6°C, twist coefficient 28ooo to 32oo.

It is obtained by false twisting the yarn at a yarn speed of 80 to 180 m/min.

In the present invention, hot water stretch fastness and hot water shrinkage rate are measured as follows.

<Hot water expansion/contraction fastness> Using a wrap reel (circumference: 1,000 m or 1,125 m) equipped with an appropriate tensilan adjustment device, make an 8-wrap wind.

To prevent the wind from getting messy, tie the strands together in two places. (Do not use the tying thread consecutively from the thread in the skein, use a different thread.) Make a figure 8 shape and fold it in half to form a loop. Repeat twice.

Hang this on a hook and apply two loads of 5/1000X8X2X2X2X denier, and apply 2 penetrants.
Soak for 15 minutes in boiling water dissolved in a concentration of y/l.

Take this sample out of the boiling water, return it to its original 8-wrap shape, hang it on a hook, and leave it wet at 2/10.
Apply a load of f number of X8X2X indicated denier and measure the length after 1 minute.

Next, remove the load, dry it in a dryer at 60±2°C for 30 minutes while hanging it on a hook without any load, leave it in the test chamber or equipment under standard conditions for at least 1 hour, and then
Apply an initial load of t number of 1000X8X2X display denier, and measure the length b) after 1 minute.

The hot water elongation 1 fci vertical waxiness (CD) is calculated using the following formula. The number of tests shall be two or more, and the value shall be expressed as the average value (to one decimal place).

Heat water shrinkage rate> Using a wrap reel (circumferential length: 1100 G or 1125 m) equipped with a suitable tensilan adjustment device, an 8-wrap wind is made.

Next, apply an initial load of f number of 1/10X8X2X denier, and measure the length a) after 30 seconds. Then, the load was removed, and the sample was immersed in boiling water with a penetrant dissolved at a concentration of 2 t/l for 20 minutes without a load, then drained with absorbent paper or cloth, and placed in a dryer at 60±2℃ for 30 minutes. dry,
Apply an initial load of t number of 1/10X8X2X denier again, and measure the length b) after 30 seconds.

The hot water shrinkage rate (SHW) is calculated using the following formula. The number of tests shall be two or more, and the value shall be expressed as the average value (to one decimal place).

-b Hot water shrinkage (SHW) (%) = -X 100 (Example) The present invention will be described below with reference to Examples, but the present invention is not limited to the Examples.

Example 9 Highly oriented undrawn polyester yarn 225 denier 48 filament yarn was set in a single-stage false twisting machine having a heater length of 0 cIn, and false-twisted under the conditions shown in A of Table 1. A false twisted yarn (A yarn) was obtained. In addition, the same raw yarn as above was set in a two-stage false twisting machine having a heater length of 90 crn, and false-twisted under the same conditions shown in B in Table 1. A processed yarn (B yarn) was obtained. In addition, a polyester cotton blend yarn (blending ratio 50% = 50%) was prepared as the C yarn. The A yarn is placed at the third yarn feeder 3 and the sixth yarn feeder 6, the B yarn is placed at the first yarn feeder 1, the second yarn feeder 2, and the fifth yarn feeder 5, and the C yarn is placed at the fourth yarn feeder 4. A reversible knitted fabric was knitted using a tack reversible knitting structure shown in FIG. 1 using a 30-inch diameter, 20-gauge circular knitting machine. The obtained knitted fabric was subjected to relaxing, presetting, dyeing, drying, and final setting as usual to complete a cotton mixed knitted fabric with a basis weight of 260 f/rrl. The front surface of the knitted fabric was knitted with B yarn, the back surface was knitted with C yarn, and A yarn was arranged as a binding yarn.

Table 1 Comparative Example In the knitting structure shown in FIG.
A knitted and knitted fabric was obtained in the same manner as in the example except that the B yarn used in the example was placed in the yarn feeder 6.

Table 2 shows the results of evaluation of the knitted fabrics obtained in Examples and Comparative Examples.

Table 2 Incidentally, pilling evaluation was performed as follows.

Pilling evaluation: After processing for 3 hours using JIS L-1058D-3 method, it was evaluated after processing for 10 hours using JISL-1076A method.

As is clear from Table 2, the pilling evaluation of the example according to the present invention was grade 4, and the occurrence of pilling was less than that of the comparative example. Also, the thickness was the same as traditional silk fabric.

(Effects of the Invention) The double-sided reversible nine-silk fabric of the present invention does not impair its appearance and texture, has a rich fabric thickness, and is a circular knitted fabric that uses long fiber yarn and has little fuzzing or pilling on the surface. Ta.

[Brief explanation of drawings]

FIG. 1 is a knitting structure diagram showing an example of the knitting structure of a double-sided reversible circular knitted fabric. 1...First yarn feeder 2...Second yarn feeder 3...Third yarn feeder 4...Fourth yarn feeder 5...Fifth yarn feeder 6...Sixth yarn feeder patent application Person Toyobo Co., Ltd. Yume 1 Figure 1-- Arithmetic 1 Refuguchi 2... $23 Sakiguchi 3...-Answer 3g Length 0 4...-) 4- Thread 0 Minute 5 Nu Article p c-...Calculation 6 Cold clue

Claims (1)

[Claims] In a double-sided reversible circular knitted fabric in which at least one of the front and back sides is knitted with long-staple yarn, the yarn connecting the front side of the knitted fabric and the back side of the knitted fabric has a hot water stretch fastness of 15 to 30%, and A double-sided reversible circular knitted fabric characterized by being made of long fiber processed yarn with a hot water shrinkage rate of 5 to 10%.