JPH0299631A - Silk-like combined filament yarn - Google Patents

Abstract

PURPOSE:To obtain the subject combined filament yarn suitable as raw yarn of woven and knitted fabric of silky touch having both of dry puffy feeling and creaky feeling and also glossy by comprising of specific large size filament group, middle size filament group and fine size filament group. CONSTITUTION:(A) A large size filament group having sharp edges in >=1 point, >=1.5 degree of modified cross-section and 1.5-5 denier yarn size is blended with (B) a middle size filament group having sharp edges in >=1 point and 0.8-1.2 denier yarn size and (C) a fine size filament group having <=0.7 denier yarn size to afford the aimed silk-like combined filament yarn suitable as raw material for clothing such as blouse or dress for ladies.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a mixed fiber system with different finenesses and different shapes. More specifically, the present invention relates to a mixed fiber yarn that has both a dry, dizzy feeling and a squeaky feeling, and is suitable as a raw yarn for shiny, silk-like synthetic fiber knits.

(Prior Art) Many proposals have been made regarding raw yarns for obtaining silk-like synthetic fiber knitted fabrics. Most of these techniques are based on differential shrinkage yarn technology, and involve blending with other component yarns or triangular cross sections, and are intended to give textiles silk-like fullness and silk-like luster through differential shrinkage effects. . Also, different contractility/
Proposals have also been made for mixed fiber yarns that combine this and irregular ridge properties. For example, in Japanese Patent Publication No. 82-67727, 0.7 d
A mixed fiber yarn of the following low shrinkage yarn and a high shrinkage yarn of 2.5d or less has been proposed, and Japanese Patent Publication No. 19612/1983 discloses that the single yarn fineness is D≦3d and the ring water shrinkage rate is 10. %0% or more yarn and single yarn 4g degree D' is 0.01 D≦D'≦D, the ring water shrinkage rate is 5% or less, and the sheath yarn with a non-circular cross section is mixed and entangled with each other. Fiber yarn was proposed, and further published in JP-A-65-995.
Publication No. 40 describes a mixed yarn consisting of a high shrinkage component and a low shrinkage component with a shrinkage difference of 5% or more, and the low shrinkage component is a thick yarn with a fineness of 3d or more and a fineness yarn with a fineness of 1.64 or less. Mixed yarns have been proposed.

These materials are effective as materials for silk-like woven and knitted fabrics, and are capable of expressing firmness, fullness, and softness on the surface. However, it also has the drawbacks of lack of dryness and crispness.

On the other hand, Japanese Patent Application Laid-Open No. 63-120134 discloses that the same irregular cross section has a single yarn m degree of 0.2 to 7. Three or more groups of polyester multifilaments made of the same polymer within the range of Od are assembled, and the cross-sectional shape of the filaments is different for each group, and the difference in water swelling and contraction rate between each group is 5 to 15%.
Fabrics using mixed yarns have been proposed. In this case, firmness, firmness, plumpness, dry touch texture, and calm luster can be obtained. However, it also has the disadvantage of lacking the squeaky feel of silk.

(Problems to be Solved by the Invention) The present inventors have developed an effective raw material to improve the above drawbacks and obtain a silk-like woven or knitted fabric having firmness and firmness, surface softness, gloss, and a unique squeaky feeling. As a result of intensive research into threads, we arrived at the present invention.

(Means for solving the problem) The present invention provides a group of thick filaments of 1.5 to 6 deniers (
A), a group of medium fineness filaments (B) of 0.8 to 1.2 deniers, and a group of fine filaments (0) of 0.7 to 1.2 deniers, and thick filaments (A).
) has an atypicality of 1.5 or more, and a thick filament (
A) and the medium anti-filament (B) are silk-like mixed υ yarns characterized by having a sharp edge in at least one location.

The preferred polymer for the mixed yarn is polyethylene terephthalate, which is obtained by copolymerizing a small amount of polyethylene terephthalate and isophthalic acid sulfonate salt, and may contain a matting agent such as titanium dioxide, a flame retardant, and a light stabilizer. Further, each filament of the mixed yarn is preferably composed of the same polymer. The reason why all the segments are made of the same polymer is that it is possible to give the woven or knitted fabric made of the mixed mallet yarn a hue as uniform as possible without giving a large shading effect or illumination effect.

This mixed fiber yarn consists of filament groups with three levels of mlW, the thick filament group (a) is 1.5 to 5 deniers, the medium magnetic filament #a3) is 0.8 to 1.2 deniers, and the fine filament group (a) is 1.5 to 5 deniers. Fineness Each filament group 0) must have a fineness of 0.7 denier or less. This is because it is necessary to simultaneously have the contradictory physical properties of firmness and V-feel and surface softness and to express a fullness. The conventional mixed knitting of two types of fineness, thick A filament and extra fine filament, produces firmness and Ff! s and the surface softness and bulge feel are insufficient.

By mixing a small amount of medium-density filaments, it is possible to express an appropriate firmness and firmness, as well as a soft and plump surface. The ratio of the number of thick filaments (A), medium gA filaments (B), and fine filaments (0) in the mixed yarn is preferably 1:1 to 2:6 to 12, and the thick filaments (A) If the amount is increased, the resulting woven or knitted fabric will have a stiff texture, and if the amount of fine filaments (0) is increased, the firmness and stiffness will be poor.

The biggest feature of this blended yarn is that the degree of irregularity of the thick filaments (A) is 1.5 or more, and the degree of irregularity of the thick filaments (A) is more than 1.5.
) and medium fineness filaments (B) have at least one sharp edge.

Here, the degree of irregularity is a value expressed by the radius α( ) of the circumscribed circle/radius (r) of the inscribed circle in the i pongee cross section, as shown in Figure @12. The atypicality of the thick a filament (A) is 1.
If it is less than 5, sufficient silk-like luster and bulkiness cannot be obtained. It is possible to obtain the desired texture by creating an irregular cross-section only for thick filaments (1), but if the irregularity is 1.5 or higher for medium-density filaments as well, it will give a more glossy and bulky feel. A certain texture is obtained.

Furthermore, there are 2 filament groups of 3 plate types that make up the main mixed thread.
It is preferable to have an irregular cross-sectional shape with the plate.

Here, the atypical cross section having at least two types of shapes refers to the following cases. That is, it means that two or more plates having the cross-sectional shapes as shown in FIGS. 5 to 8 coexist, and cases where the plates have similar shapes but different finenesses are the same shape and are one type.

Furthermore, the relationships between FIGS. 6 and 9, and between FIGS. 6 and 10, have the same number of corners (3 and 4) and have the same shape. However, if it can be seen at a glance that two different cross sections are different from each other, they are not necessarily considered to be the same.

Next, sharp edges will be explained. A sharp edge refers to a radius of curvature of 1 μ or less, preferably 0.3 when the edge is observed by enlarging the cross section as shown in FIG.
μ or less, most preferably 0.1 μ or less.

In the case of composite #ia fibers that are melt-spun, no matter how sharp the irregular shape of the discharge hole is, the edges will be rounded due to the surface tension of the melted and discharged polymer, making it impossible to form a cross section with sharp edges. A fiber that does this is difficult to obtain. As a method for obtaining a fiber bundle composed of filaments with sharp edges, for example, a composite yarn having a cross section as shown in FIGS. more than one
Segments with at least one sharp edge (
The most effective method is to dissolve and remove the easily soluble polymer (2) of the decomposed steel thread in step 1). The easily soluble polymer may be any polymer that can be used with a solvent that dissolves only the easily soluble polymer (2) without dissolving the sharp edged segments (1). For example, if the easily soluble polymer (2) is nylon 6, By using formic acid, if available, toluene, etc., if polystyrene is used, a fiber bundle composed of segments having a cross section with sharp edges can be obtained. Also, segments with sharp edges (1) and easily soluble polymers (2)
) is polyester-based, there is no problem as long as the easily soluble polymer (2) has a much faster solubility than the polyester-based polymer of the segment (1) having sharp edges. For example, if polyethylene terephthalate is copolymerized with a large amount of isophthalic acid sulfonate salt or polyalkylene glycol, it can be dissolved and removed by simply treating it with an alkaline aqueous solution for a short time, so that the sharp edges of the segments will be dissolved and rounded. can be prevented. Having sharp edges as described above gives the resulting woven or knitted fabric a unique squeaky feeling, and also lowers the packing density of each segment, making the amm circular voids thicker (which also creates a bulging feeling). It is possible to make it happen.

Therefore, by weaving and knitting an aggregate of composite yarns as shown in Figures 2 to 4 and dissolving and removing the easily soluble polymer (2) of the composite yarns, it is possible to improve firmness and elasticity, surface softness, dizziness and luster. It is also possible to obtain a woven or knitted fabric with a good squeaky feel.

Furthermore, in order to further improve the dry feel and fluffy feel, the composite yarn aggregates as shown in Figures 5 and 4 are entangled with each other by interlacing, etc., and then knitted and woven. A method of dissolving and removing the easily soluble polymer (2) is effective.

In this case, since the single yarns within each filament group are not intertwined, but the filament groups are intertwined, only the fullness can be improved without impairing the surface softness. If you want to further improve the feeling of fullness, use small aggregates of composite yarns with low water-swelling and shrinkage rates as shown in Figures 3 to 4, and small aggregates of composite yarns with low water swelling and shrinkage rates. After gold thread or interlaced thread! ! i! Woven and knitted,
A method of dissolving and removing the easily soluble polymer (2) is also effective. In this case, it is preferable that the difference in water swelling and shrinkage ratio between a composite yarn with a low swelling and shrinkage ratio and a composite yarn with a high water swelling and shrinkage ratio is 5% or more. Depending on whether heat setting is performed or not during the drawing process of the yarn, a difference can be caused in the water swelling and shrinkage rate. Furthermore, it is also effective to subject composite yarns as shown in FIGS. 5 to 4 to a woven or knitted fabric after false twisting or strong twisting, and then subjecting the yarn to a solvent treatment (this is effective in improving the texture and crispness).

This will be explained in more detail with reference to Examples below.

(Example) Polyethylene terephthalate with an intrinsic viscosity of 0.65 containing 0.05% by weight of titanium dioxide, and polyethylene terephthalate obtained by copolymerizing 5% by mole of sodium isophthalic acid sulfonate and 10% by weight of polyethylene glycol with a molecular weight of 4000. Composite spinning with a cross section as shown in FIG. 2 was carried out using the filament, and a filament of 160 cl/12 f was prepared. The discharge ratio (volume ratio) of polyethylene terephthalate and copolymerized polyester was set to 3:1.At this time, the diameter and number of grooves of each segment introduction hole of the composite nozzle were adjusted to form a thick section with a cross section as shown in Figure 2. , Seven types of composite yarns of tsoa/12f with various numbers of segments and m degree in the medium fineness part and fine a part were collected. After creating a plain woven fabric using these obtained composite yarns as warp and weft. , treated with 1% Na (H1 solution) at 100°C for 16 minutes to remove the co-textured polyester. After treatment, the a degree of the warp and weft was 112d, and the cross section was
As shown in the figure, the degree of irregularity of the thick filament was 1.1, and the thick S prong and middle M prong had sharp edges.

Also, for comparison, 56d/25f with a round cross section as shown in Figure 13.
A plain woven fabric was prepared by using a mixed yarn of 58 d/200 f for the warp and weft so that the final weave density was the same as that of the above-mentioned woven fabric.

The evaluation results of these plain woven fabrics are shown in Table 1.

This result shows that due to the existence of intermediate reef segments,
It can be seen that the firmness/si, surface softness, and bulgeness are on the opposite side, and that the squeaky feeling can be expressed because it is composed of segments with a cross section with sharp edges.

(Effects of the Invention) By knitting and weaving using the blended yarn of the present invention, it is possible to produce knitted fabrics with appropriate firmness, surface softness, fluffiness, and creakiness. It has a silk-like texture and luster, and can be used as a material for women's clothing such as blouses and dresses.

[Brief explanation of drawings]

FIG. 1 shows an example of the polyester blend yarn of the present invention.
FIG. 3 is a schematic cross-sectional view of the composite yarn of FIG. 2 after the easily soluble polymer is removed. Figures 5 and 4 are examples of cross sections of composite yarns that are effective for obtaining the polyester blend yarn of the present invention, in which (1) is a segment with sharp edges, (2)
) is an easily soluble polymer. FIGS. 5 to 10 are examples of cross-sections of thick or medium fineness segments constituting the a bundle, which have sharp edges. Figure 11 shows the radius of curvature of the edge by enlarging the sharp edge.
Figure 2 is an explanatory diagram of the different types. FIG. 13 is a schematic cross-sectional view of a mixed fiber yarn other than the present invention used for comparison. Figure 12 Figure 13

Claims (1)

[Claims] (1) Group of thick filaments of 1.5 to 5 deniers (A
) and 0.8-1.2 denier medium-denier filament group (
B) and fine filament group of 0.7 denier or less (
A mixed yarn consisting of thick filaments (A
) has an atypicality of 1.5 or more, and a thick filament (
A silk-like blended yarn characterized in that A) and the medium fineness filament (B) have a sharp edge in at least one location.