JPH0120256B2 - - Google Patents

Description

[Detailed description of the invention]

<Industrial Application Field> The present invention relates to a special interlaced yarn that can impart excellent fullness and a warm taste to a fabric that increases the porosity between filaments. <Conventional technology> In general, multifilament yarn has a
It has the disadvantages of lacking a warm taste, fullness, and bulkiness, as well as having a unique slimy feeling. For this reason, textured yarns that have been subjected to various treatments have been proposed in order to eliminate the drawbacks of these filament yarns. For example, bulky yarns are known in which loops and entanglements are formed by applying a jet to multifilament yarns. ing. However, although the bulkiness of such a yarn is improved by forming loops in the surface layer of the yarn, the packing density of fibers is high in the inner layer (core) of the yarn and there are few voids between the fibers. When made into fabric, it has been pointed out that it has drawbacks such as not being able to provide a warm taste and lack of volume. On the other hand, many irregular cross-section yarns have been proposed to improve the gloss of ordinary multifilament yarns and give them a texture that eliminates the slimy feel. However, the present inventors conducted various studies by forming loops and slacks in these conventional irregular cross-section yarns, and found that conventional irregular cross-section yarns have good heat retention, fullness, and It was found that the cross-sectional shape was not suitable for imparting bulkiness. That is, for example, irregular cross-sectional yarns having triangular or star-shaped cross-sectional protrusions have been put into practical use as giving a texture that eliminates gloss 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, the convex portions of other filaments tend to enter the concave portions of one filament, causing a so-called filling effect in which the filaments come into close contact with each other. When the filament in the strip or fabric is constrained, there is a drawback that it lacks a sense of fullness. <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 an excellent fluffy feel and a warm and voluminous texture. The technical challenge is to make it possible. <Means for Solving the Problems> That is, 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. Hereinafter, the present invention will be explained in further detail. 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, and many loops and slacks are formed on the surface of the yarn. There is. 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 into the filaments, making it difficult for the so-called close-packing effect in which the filaments come into close contact with each other to occur. Therefore, many voids can be formed between the filaments in the 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 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. 2 and 3 show examples of cross-sectional shapes of the filament of the present invention, FIG. 3 shows a mushroom-shaped case consisting of an approximately triangular umbrella 1 and a curved trunk 2, and FIG. 3 shows a mushroom-shaped case consisting of an approximately pentagonal umbrella 1 and an approximately rectangular trunk 2. . In the illustrated example, the polygonal umbrella portion 1 has 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 circle, resulting in a lack of dryness and deterioration in intertwining and convergence, so it is most preferable to use a substantially triangular shape. Also, the cross-sectional shape is shown in Figure 2a and Figure 3.
The left and right sides may be approximately symmetrical as shown in the figure, or may be asymmetrical as shown in FIG. 2b. Furthermore, in order to prevent filaments from getting stuck in each other, it is preferable that the filaments have substantially the same cross-sectional shape, but in order to provide variety in gloss and feel, it is preferable to use filaments with different cross-sectional shapes, such as those shown in FIG. (b) may be mixed as appropriate. The mushroom-shaped filament cross-sectional shape has a distance from the tip to the bottom of the polygonal umbrella portion 1 as H ₁ ,
The distance from the bottom of the polygonal umbrella part 1 to the end of the trunk 2 is H ₂ , the maximum width of the polygonal umbrella 1 is L ₁ , and the center between the bottom of the polygonal umbrella 1 and the end of the trunk 2 When the maximum width of the trunk 2 from the end to the end of the trunk 2 is L ₂ , these can be expressed as
It is preferable to satisfy the following. H ₁ +H ₂ ≧L ₁ (1) H ₂ ≧1/2H ₁ (2) L ₂ ≦1/2L ₁ (3) By making the cross-sectional shape of the filament as described above, the above-mentioned close packing effect of the filament can be achieved. The effect of preventing this is further improved, and the effect of protruding the trunk 2 can be further enhanced. In particular, in equation (2) that defines the length relationship between the umbrella section 1 and the trunk section 2, when H ₂ ≧ H ₁ , that is, when the length of the trunk section 1 is greater than or equal to the length of the umbrella section 2, The effect of preventing dense packing can be further enhanced, high porosity can be achieved, and the resulting fabric can be given a non-hard creak and a rich fluffy feel. A filament having 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.For example, a filament having the cross-sectional shape shown in FIG. is obtained by melt-spinning a polymer through a spinneret having a spinning hole in the shape shown in FIG. Thus, the interlaced yarn of the present invention is made up of 20% or more of filaments having the above-mentioned cross-sectional shape. In this case, if the filament with a mushroom-shaped cross-section accounts for less than 20%, 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 mushroom-like cross-sectional shape can be changed as appropriate depending on the cross-sectional shape and the 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 mushroom-shaped cross-section. Thus, the entangled yarn of the present invention effectively exhibits the effect of preventing filling between the filaments due to the synergistic effect of the presence of filaments with a mushroom-shaped cross-section and the formation of loops, slack, and entanglement, and the effect of preventing filling between the filaments is effectively exerted, and the interfilament is effectively prevented from forming from the inner layer to the surface of the yarn. By increasing the porosity between the filaments, it is possible to impart excellent fullness and a warm taste to the resulting fabric. In addition, since the interlaced yarn of the present invention has filaments with a mushroom-shaped cross-section existing as fiber bundles and loops and slacks are formed in the filaments, the bottoms of the polygonal umbrellas of the mushroom-shaped filaments can be caught as appropriate. It has excellent morphological stability, as it has strong loops and slacks formed by joining together. In order to obtain the above-mentioned interlaced yarn of the present invention, a multifilament yarn consisting of filaments with a mushroom-shaped cross section is spun alone or with other multifilament yarns using a fluid jet nozzle (for example, as described in Japanese Patent Publication No. 35-1673). It can be obtained by supplying the material to the air 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 a multifilament yarn Y ₁ made of filaments with a mushroom-shaped cross section is supplied to a feed roller 11 and a fluid jet nozzle 12
The air jet process is applied and entangled,
The package passes through a delivery roller 13 and is then rolled up into a package 15 by a winding roller 14. 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. It may be a different mixed yarn. <Examples> The present invention will be specifically described below based on Examples. Example Polyethylene terephthalate (intrinsic viscosity 0.65)
Using spinnerets with 12 and 72 holes with spinning holes of the shape shown in Figure 4, melt-spun the fibers into undrawn yarn, which was then hot-stretched at a draw ratio of 3.0 to form a filament with a mushroom-shaped cross-section. polyester drawn yarn
30d/12f and 150d/72f were manufactured respectively. When we examined the cross-sectional shapes of these drawn yarns, we found that filaments with the cross-sectional shapes shown in Figure 2 a and b were mixed, and they were H ₁ + H ₂ /L ₁ = 1.6 H ₂ /H ₁ = 1
L ₂ /L ₁ =0.4. In addition, H ₁ , H ₂ , L ₁ , L ₂
took a photo of the cross section of the filament (400x magnification),
The average value was determined by actual measurements from the photographs. Polyester drawn yarns 30d/12f and 150d/ made of these drawn yarns and filaments with triangular cross-sections
72f, and adjust the yarn speed according to the process shown in Figure 5.
250m/min, overfeed rate 20%, pressure 6
Air jet processing was performed at Kg/cm ² to obtain interlaced yarns of the present invention (No. 1 to No. 4) and comparative interlaced yarns (No. 5 to No. 7) with different contents. Using these interlaced threads, No. 1 and No. 6 have warp density.
85 lines/inch, latitude density 72 lines/inch, No.2, No.4 and No.7
The longitudinal density is 60 lines/inch, the latitudinal density is 51 lines/inch, No. 3 and No. 5.
The material was woven into a plain weave fabric with a warp density of 71 threads/inch and a weft density of 66 threads/inch, respectively, dyed and finished, and their properties were investigated, and the results shown in Table 1 were obtained.

[Table] As is clear from Table 1, the interlaced yarn of the present invention has good entangling properties, that is, loop fastness, and has an excellent loop forming effect compared to the comparative interwoven yarn.
In addition, the fabrics obtained from the interlaced yarns of the present invention have excellent fluffiness, warm taste, and dry feel, and while the fabrics obtained from the comparative interwoven yarns have a metallic luster, they have a mild luster. It had an elegant luster. <Effects of the Invention> As described above, the interlaced yarn of the present invention is made of a multifilament yarn and has loops and slack, and the constituting filament has an umbrella portion and a trunk portion each having a polygonal cross-sectional shape. Because it contains 20% or more of mushroom-shaped filaments, the presence of mushroom-shaped filaments as fiber bundles and the synergistic effect of forming loops, slacks, and entanglements result in good robustness of loops and slacks. It has excellent shape stability and effectively prevents filling between the filaments, increasing the porosity between the filaments from the inner layer to the surface of the yarn, giving the fabric excellent fullness and a warm taste.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the appearance 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 with 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. DESCRIPTION OF SYMBOLS 1... Polygonal umbrella part, 2... Main body, 11... Feed roller, 12... Fluid injection nozzle, 13... Delivery roller, 14... Winding up roller, 15... Package cage.

Claims (1)

[Scope of Claims] 1. An interlaced yarn made of multifilament yarn and having loops and slack, wherein the constituting filaments include mushroom-shaped filaments consisting of an umbrella portion and a trunk portion each having a polygonal cross-sectional shape. A special intertwined yarn characterized by containing 20% or more. 2 The cross-sectional shape of the filament is expressed by the following formulas (1), (2) and (3).
The special intertwined yarn according to claim 1, which satisfies the following. 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 base of the polygonal umbrella to the end of the trunk L ₁ : Maximum width of the polygonal umbrella L ₂ : Distance from the center of the polygonal umbrella, the base, and the end of the trunk to the end of the trunk The special interlaced yarn according to claim 1 or 2, wherein the polygonal umbrella portion has a substantially triangular shape.