JPS6170032A - Special interlaced yarn - 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 <Industrial Application Field> The present invention relates to a special intertwined yarn that can increase the porosity between filaments and impart excellent fullness and warm taste to a fabric.

<Conventional technology> In general, multifilament yarn is compared to spun yarn.

It has drawbacks such as a warm taste, a fluffy feel, a lack of bulk, and a characteristic sliminess.For this reason, it has been necessary to eliminate these drawbacks of filament yarn (using various processing methods). For example, bulky yarns made by applying a jet to multifilament yarns to form loops or entanglements are known. Although the fiber content is improved in the inner layer (core) of the yarn, the packing density of the fibers is high and there are few voids between the fibers, so when made into a fabric, it does not have a warm taste and has disadvantages such as lack of volume. It has been pointed out.

On the other hand, a number of yarns with irregular cross-sections have been proposed as a yarn that improves the gloss of ordinary multifilament yarns and imparts a texture that eliminates sliminess. but.

The present inventors conducted various studies by forming loops and slack in these conventional irregular cross-section yarns, and found that conventional irregular cross-section yarns impart heat retention, fullness, and bulkiness by forming loops and interlacing. It was found that the cross-sectional shape was not suitable for this purpose.

For example, yarns with irregular cross-sections having triangular or star-shaped protrusions have been put to practical use as they provide a texture that eliminates the luster and sliminess that cannot be obtained with ordinary multifilament yarns.

Since these cross-sectional shapes alternately have convex portions and concave portions of approximately the same shape in the circumferential direction, a so-called filling effect in which the convex portions of other filaments enter the concave portions of one filament and the filaments come into close contact with each other tends to occur.

When the filaments of yarn or fabric are constrained, there is a drawback that the feeling of fullness is lacking.

<Problems to be Solved by the Invention> The present invention was achieved as a result of intensive research in order to eliminate the above-mentioned drawbacks of the prior art. The synergistic effect with this increases the porosity between the filaments from the inner layer to the surface layer of the intertwined yarn, giving the fabric excellent fluffiness and giving it a warm and voluminous texture. The technical challenge is to do so.

<Means for Solving the Problems> In other words, the present invention is an interlaced yarn made of multifilament yarn and having loops and slack, and the interlaced yarn has an umbrella portion and a trunk portion each having a polygonal cross-sectional shape in its constituent filaments. It is characterized by containing 20% or more of mushroom-shaped filaments consisting of.

The present invention will be further explained in detail below.

FIG. 1 shows an example of the interlaced yarn of the present invention.

The interlaced yarn of the present invention is composed of multifilament yarns, each of which is entangled with each other.

Many loops and slacks are formed on the yarn surface.

The interlaced yarn has filaments having a mushroom-shaped cross section in its constituent filaments. Here, to explain in detail the filament having a mushroom-shaped cross-section, the filament has a mushroom-shaped cross-section consisting of a polygonal umbrella portion and a trunk. Here, the mushroom-like shape refers to a slight bulge in the narrowing from the cap to the trunk, preferably a shape in which the details are sharply formed in a straight line or curved.

In this way, a filament with a mushroom-shaped cross-section has a polygonal umbrella and a trunk that are asymmetrical and have different shapes. The convex portions of other filaments enter the filaments, creating a so-called close-packing effect in which the filaments stick together. Therefore, many voids can be formed between the filaments even in yarn or fabric.

In addition, since each vertex and trunk of the polygonal umbrella protrude outward, it does not have the slimy feel characteristic of filaments, giving it a silky, dry feel similar to that of wild silkworm silk. Furthermore, the light rays reflected by the polygonal umbrella and the light rays reflected by the trunk partially cancel each other out, giving it a mild luster.

FIGS. 2 and 3 show examples of cross-sectional shapes of the filament of the present invention, and FIG. 2(a) shows a substantially triangular umbrella (
Mushroom-shaped, consisting of 1) and a roughly rectangular trunk (2).

Figure fb) shows a substantially triangular umbrella (1) and a curved trunk (
2) is mushroom-shaped, and Figure 3 shows a roughly pentagonal umbrella (
1) and a mushroom-shaped case consisting of a substantially rectangular trunk (2) are shown.

In the illustrated example, a polygonal umbrella part (11 is shown in a substantially triangular shape or a substantially pentagonal shape).

The umbrella portion (1) may have any polygonal shape. However, as the number of sides of the polygon increases, the cross-sectional shape becomes closer to a circular shape, resulting in a lack of dry edges and a decrease in entangling and convergence, so it is most preferable to use a substantially triangular shape. Also,
The cross-sectional shape may be approximately symmetrical on the left and right as shown in Figures 2 (a) and 3, or may be asymmetrical as shown in Figure 2 (bl). In order to suppress this, it is preferable to make the filaments approximately the same shape, but in order to provide variety in gloss and feel, filaments with different cross-sectional shapes 1, for example, Fig. 2 (a) are used.
1 and (bl) may be mixed as appropriate.

The cross-sectional shape of the tile-shaped filament is such that the distance from the tip to the bottom of the polygonal umbrella (1) is H3°, and the distance from the bottom of the polygonal umbrella (1) to the end of the trunk (2) is Ht+ Polygonal umbrella part (maximum middle of 11 is Ll + polygonal umbrella part (maximum middle of trunk (2) between the center of the base of 11 and the end of trunk (2) to the end of trunk (2)) When is L2, it is preferable that these satisfy the following formulas Tl), +21, and (3).

H++Hz ≧L + (1)H
2≧'A HIf2) L25% L + (3) By making the cross-sectional shape of the filament like this, the effect of preventing the above-mentioned close packing effect of the filament is further improved, and the protrusion effect of the trunk (2) is further improved. It can be increased further. In particular, in equation (2) that defines the length relationship between the umbrella portion (11) and the trunk portion (2).

In the case of H2≧H1, that is, the length of the trunk (1) is
When the length is longer than 2), the effect of preventing dense packing can be further enhanced, a high porosity can be achieved, and the obtained fabric can be given a hard creak and a rich fluffiness.

Filaments with the above-mentioned cross-sectional shape can be obtained by spinning using a special spinneret in which the slit width, length, and shape of the spinning hole are appropriately changed. is obtained by melt spinning using a spinneret having a spinning hole having the shape shown in FIG.

Accordingly, the intertwined yarn of the present invention has 20% or more of filaments having the above-mentioned cross-sectional shape in its constituent filaments. In this case, if less than 20% of the filaments have a tiled cross-sectional shape, the effect of preventing close packing cannot be obtained and a high porosity cannot be achieved, which is not preferable. The content of filaments with a tiled cross-sectional shape can be changed as appropriate depending on the cross-sectional shape and the intended use of the obtained fabric, but the higher the content, the more remarkable the effect of the present invention is. It is also possible to use a filament with a tiled cross-sectional shape.

(2) The interlaced yarn of the present invention effectively exhibits the effect of preventing filling between filaments due to the synergistic effect of the presence of filaments with a tiled cross-sectional shape and the formation of loops, slack, and entanglement, and the interfilament prevention effect is effectively exhibited, and the By increasing the porosity between the filaments, it is possible to impart excellent fullness and a warm taste to the resulting fabric.Furthermore, the interlaced yarn of the present invention has filaments with a tiled cross-sectional shape existing as fiber bundles. Because loops and slack are formed in the
The bases of the polygonal umbrella portions of the tile-like filaments are appropriately engaged with each other to form firm loops and slacks, resulting in excellent morphological stability.

In order to obtain the above-mentioned interlaced yarn of the present invention, a multifilament yarn consisting of filaments with a tiled cross-sectional shape is used singly or with other multifilament yarns, and a fluid injection nozzle (
For example, the publication of Special Publication No. 35-1673! It can be obtained by supplying it to a glass plate and subjecting it to air jet processing.

FIG. 5 is a process-schematic diagram showing an example of the method for manufacturing the entangled yarn of the present invention, in which the multifilament yarn (Y,) consisting of filaments with a tiled cross-section is fed by a feed roller CI.
+1, air jet processing is performed by the fluid injection nozzle 0, and the particles are entangled.

It passes through a delivery roller 03 and is rolled up into a package a9 by a winding roller 04).

The multifilament yarn in the present invention may be made of any material as long as it meets the purpose of the present invention, and may have any single yarn fineness, heat shrinkage rate, elongation, and number of filaments, depending on these properties. Different mixed fiber yarns may be used.

<Example> The following three embodiments of the present invention will be specifically described based on examples.

Example Polyethylene terephthalate (intrinsic viscosity 0.65) was melt-spun into an undrawn yarn using spinnerets with 12 and 72 spinning holes of the shape shown in Figure 4, which were drawn at a draw ratio of 3.0. Polyester drawn yarn 30d/12f and 1
50 d/72 f were produced respectively.

When we investigated the cross-sectional shapes of these drawn yarns, we found that they are shown in Figure 2 (a
) and (b) are mixed, and they are Hl +)(, /l, + -1,6Hz
/H1-I Lx /L, -0.4. In addition,
HlHz, L+, and Lx were obtained by taking a photograph of the cross section of the filament (400 times magnification) and actually measuring from the photograph to determine the average value.

Polyester drawn yarns 30d/12f and 150d/7 consisting of these drawn yarns and filaments with triangular cross-sections
2 f, and according to the process shown in Figure 5, the yarn speed was 25.
0m/min, overfeed rate 20%, pressure 6k
The interlaced yarns of the present invention (numbers 1 to 4) and comparative interwoven yarns (numbers 5 to 4) were subjected to air jet processing at g/ad and had different content rates.
7) was obtained.

Using these intertwined threads, threads 1 and 6 have a density of 85 threads/
吋、Latitudinal density 72 lines / 吋、Han 2. Dimension 4 and volume 7 are meridian density 6
0 lines/inch, latitude density 51 lines/inch 1st floor 3 and block 5 have longitudinal density 71
The fabrics were woven into plain weave fabrics with a fiber density of 66 fibers/inch and a weft density of 66 fibers/inch, respectively, dyed and finished, and their properties were investigated, and the results shown in Table 1 were obtained.

Table 1 (Note) The number of loops in the table is the height 0.
This is the value obtained by measuring 21 or more loops and slack using an F-Intex device (manufactured by Shikishimabo Fl1). Furthermore, the intertwining properties in Table 2 are obtained by subjecting the threads to tension and relaxation several times for convenience and observing the convergence state of the threads. The evaluation of the fullness, warm taste, and dry feeling was the average value of the evaluation values by 20 evaluators, and the criteria for evaluation were: ◎: Very good.

Evaluation was made on a four-level scale: ◯: good, Δ: slightly poor, ×: poor.

As is clear from Table 1, the interlaced yarn of the present invention has good entangling properties, that is, loop fastness, and has a superior loop-forming effect compared to the comparative interlaced yarn.

In addition, the fabric obtained from the interlaced yarn of the present invention has excellent fluffiness, warm taste, and dry feel, and while the fabric obtained from the comparative interlaced yarn has a metallic luster, it has a mild luster. It had an elegant luster.

<Effects of the Invention> As stated above, the interlaced yarn of the present invention is made of multifilament yarn and has loops and slack,
Since the constituent filaments contain 20% or more of mushroom-shaped filaments consisting of an umbrella part and a trunk with a polygonal cross-sectional shape, the mushroom-shaped filaments exist as fiber bundles and there are no loops or slacks. The synergistic effect with interlacing and formation of loops and slacks provides good robustness of loops and slack, excellent morphological stability, and effectively prevents filling between filaments, reducing the porosity between filaments from the inner layer to the surface of the yarn. It can impart excellent fullness and a warm taste to high-quality fabrics.

[Brief explanation of the drawing]

Fig. 1 is a schematic external view of the entangled yarn of the present invention, Figs. 2 and 3 are cross-sectional views showing an example of the mushroom-shaped filament of the present invention, and Fig. 4 is a filament having the cross-sectional shape shown in Fig. 2. FIG. 5 is a cross-sectional view showing an example of the shape of the spinning hole of a spinneret for spinning the yarn, and FIG. 5 is a process schematic diagram showing an example of the method for producing the interlaced yarn of the present invention.

Claims (3)

[Claims] (1) An interlaced yarn consisting of a multifilament yarn and having loops and slack, the interlaced yarn containing 20% or more of mushroom-shaped filaments consisting of an umbrella part and a trunk with a polygonal cross-sectional shape in the constituent filaments. A special intertwined yarn that is characterized by its ability to become tight. (2) The special intertwined yarn according to claim 1, wherein the cross-sectional shape of the filament satisfies the following formulas (1), (2), and (3). H_1+H_2≧L_1(1) H_2≧1/2H_1(2) L_2≦1/2L_1(3) However, H_1: Distance from the tip to the bottom of the polygonal umbrella H_2: Distance from the bottom of the polygonal umbrella to the trunk Distance to the end L_1: Maximum width of the polygonal umbrella L_2: Maximum width of the trunk from the center of the bottom of the polygonal umbrella and the end of the trunk to the end of the trunk (3) The special interlaced yarn according to claim 1 or 2, wherein the polygonal umbrella portion has a substantially triangular shape.