JP2003313721A - Multi-lobar cross-sectional filament - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-lobar cross-sectional filament which can suitably be used for a soft clothing fabric having a good touch and an excellent water- absorbing property and for a wiping fabric having an excellent water-absorbing property and an excellent wiping property. <P>SOLUTION: This multi-lobar cross-sectional filament is characterized by having a cross-sectional shape having three or more lobes each having an angle αof ≤90° at the tip of the lobe and satisfying the following expressions (1) and (2). (1) 0.5r≤a<SB>max</SB>[(r) is the radium of the circumscribed circle of the filament cross section; a<SB>max</SB>is the longest line among lines formed by binding two points B<SB>i</SB>(common to C<SB>i-1</SB>) and C<SB>i</SB>(common to B<SB>i+1</SB>) shared with each lobe of the filament cross section and the adjacent lobe to the tips T<SB>i</SB>of respective lobes]. (2) Σ2S<SB>i</SB>/K<SB>i</SB>L<SB>i</SB>N≤1.5 [K<SB>i</SB>is the length of a line B<SB>i</SB>C<SB>i</SB>formed by binding two points B<SB>i</SB>(common to C<SB>i-1</SB>) and C<SB>i</SB>(common to B<SB>i+1</SB>) each shared by each lobe of the filament cross section and the adjacent lobe; S<SB>i</SB>is the area of a part obtained by cutting each lobe with the line B<SB>i</SB>C<SB>i</SB>; L<SB>i</SB>is a distance between the tip of each lobe and the line B<SB>i</SB>C<SB>i</SB>; N is the number of the lobes in the filament cross section]. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a multi-leaf cross-section which can be suitably used for a cloth for clothes which has a soft and silky feel and is excellent in water absorption and a cloth for wiping which is excellent in water absorption and wipeability. It relates to filament yarn.

[0002]

2. Description of the Related Art Various types of cross-section yarns have been studied in the past, and many studies have been conducted on multi-leaf type cross-sections. Typically, there is a method of directly spinning a yarn having a multi-lobed cross section depending on the shape of the spinneret hole.

Further, a composite yarn using a polymer containing an elution component is a sea-island type composite yarn for the purpose of obtaining ultrafine fibers,
Various core-sheath type composite yarns to be split later have been proposed.

[0004]

However, in the direct spinning method using the modified die, the shape is rounded because the viscosity of the polymer immediately after the die is discharged is low. This is due to the work of lowering the surface tension.

When it is used for a wiper, a sufficient wiping property cannot be obtained because the fiber portion in contact with the object to be wiped is rounded. Moreover, since the cross-sectional shape is rounded, sufficient water absorption cannot be obtained.

Further, in the conventional splitting type fiber, different fibers such as polyamide and polyester are used in the fabric.
Since there are different types of fibers, it is necessary to use two types of dyes, such as a disperse dye and an acid dye, which causes problems such as a long dyeing time and poor wash fastness. Further, the method of dyeing only one of the fibers causes a problem that a dark color cannot be obtained. Further, in the conventional split fiber, since the split sheath yarn has a very small fineness, light is likely to be diffusely reflected, and a dark color cannot be obtained because the color tone looks light.

[0007] The conventional sea-island type composite yarn is intended to obtain ultrafine fibers, and a shape-controlled yarn has not been proposed. In the core-sheath type composite yarn to be split later, it is proposed to make the shape of the core part a multi-lobed variant in order to split easily, For the purpose of obtaining, only those that leave the micronized sheath component are seen. In this case, since the strength of the ultrafine fibers is low, there is a drawback that fluff or yarn breakage easily occurs.

An object of the present invention is to provide a cloth for clothes which has a soft and dry feel and is excellent in water absorption, and water absorption,
It is an object of the present invention to provide a multi-lobe cross-section filament yarn that can be suitably used for a wiping cloth having an excellent wiping property.

[0009]

The present invention adopts the following configurations in order to solve the above problems. That is, [1] a multi-lobed filament having a cross section of 3 or more leaves having an angle α of 90 ° or less between the leaf vertices and satisfying the following formulas (1) to (2): yarn. (1) 0.5r ≦ a _max (where r is the circumscribed circle radius of the filament cross section,
Two points B _i that each leaf of the filament cross section shares with the adjacent leaf
The longest line segment connecting C _i (common to C _i -1) and C _i (common to B _{i + 1} ) at each vertex T _i of each leaf is defined as a _max . ) (2) Σ2S _i / K _i L _i N ≦ 1.5 (However, two points B _i (common to C _i −1) and C _i (B _{i that} each leaf of the filament cross section constitutes an adjacent leaf) The length of a line segment B _i C _i that connects (the same as ₊₁ ) is K _i , the area of the portion where each leaf is cut off by the line segment B _i C _i is S _i , the vertex of each leaf and the line segment B _i C the _i distance was L _i. also the number of leaves with the filament cross section was N.) [2] multileaf section filament yarn according to [1], which consists of polyamide fibers.

[3] The above-mentioned [1] or [2], which is produced by dissolving the core-sheath type composite yarn.
Multifilament cross-section filament yarn according to.

[4] The filament yarn having multi-lobed cross section according to the above [3], wherein the core component is polyamide and the sheath component is polyester.

[5] A fabric characterized by using the filament yarn having a multi-lobed cross section according to any one of [1] to [4].

[6] A wiping cloth using the cloth according to the above [5].

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A detailed description will be given below with reference to the drawings. The filament yarn according to the present invention includes polyesters such as polyethylene terephthalate, polypropylene terephthalate and polybutadiene terephthalate, polyamides such as nylon 6, nylon 66 and nylon 12,
Polyacrylonitrile or any other synthetic fiber may be used, but it is preferably composed mainly of polyamide from the viewpoint of water absorption. Further, the polymer may be not only a homopolymer but also a copolymer thereof. Further, known matting agents, light-proofing agents, heat-resistant agents, antistatic agents, etc. can be added, and the number of filaments and the single yarn fineness can be set arbitrarily according to the purpose.

The filament yarn of the present invention has three or more leaves whose cross section has an angle α of 90 ° or less between the vertexes of the leaves, and preferably the number of leaves is five or more. Here, the leaf means, as indicated by reference numeral 1 in FIG. 1, in a cross section,
It refers to the part that is a convex protrusion. Further, (common to C _i-1) the angle alpha 2 points B _i of each leaf and the vertex T _i of the leaves share the leaves next, C _i (B i _{+ 1} and common) angle by B _i T _i Define as C _i .

When the angle α formed by the vertices of the leaves is less than 90 ° and the number of leaves is 2 or less, the protrusions do not sufficiently project to the surface when formed into a woven fabric or knitted fabric. As a result, the wiping property is deteriorated, and the soft touch is impaired as the cloth for clothing. The angle formed by the apexes of the leaves is determined by taking a cross-section of the thread on a micrograph and measuring the angle.

The radius of the circumscribed circle of the filament cross section is r,
Two points B where each leaf of the filament cross section shares with the adjacent leaf
_i(C_i-Common with 1), C_i(B_{i + 1}Is common to each leaf
Vertex T of _iThe longest line segment connected by_maxWhen
It is defined as shown in FIGS. At this time, the present invention
The filament thread in (1) 0.5r ≦ a_max Is satisfied, preferably 0.6r ≦ a_max, Further
Is preferably 0.7r ≦ a_maxIs. 0.5r> a_maxof
Sometimes the small leaf length causes sufficient capillarity.
It cannot be caused, and the water absorption is reduced.

In addition, a line segment B _i C _i connecting two points B _i (common with C _i -1) and C _i (common with B _{i + 1} ) where each leaf of the filament cross section constitutes an adjacent leaf Let K _i be the length, and each leaf be a line segment B _i
When the area of the portion cut by C _i is S _i , the distance between the vertex of each leaf and the line segment B _i C _i is L _i, and the number of leaves in the filament cross section is N, the filament yarn in the present invention is , (2) Σ2S _i / K _i L _i N ≦ 1.5, preferably Σ2S _i / K _i L _i N ≦
1.35, more preferably Σ2S _i / K _i L _i N ≦ 1.
It is 2.

When Σ2S _i / K _i L _i N> 1.5,
Since the leaves are rounded, the wiping property and water absorption are deteriorated.

For S _i , K _i , L _i and N, the yarn is cut perpendicularly to the fiber length direction, the cut surface is observed by SEM, and a photograph is taken. It can be obtained by measuring the area and length. From the measured values, S _i / K _i L _i N for i = 1 to N,
Σ2S _i / K _i L
_i N is required. For example, in the case of FIG. 2A, S ₁ ,
_{K 1, L 1, S 2} , K 2, L 2 ···· S 8, K 8, actually measured _{L 8, S 1 / K 1} L 1 N, S 2 / K 2 L 2 N ···・ S ₈ / K ₈ L
By calculating ₈ N and summing them, Σ2S _i / K _i L _i
N is required.

An example of the method for producing the filament yarn according to the present invention is as follows. That is, a core-sheath composite yarn in which a component capable of eluting is placed in a sheath and a component which is insoluble in an eluent used for eluting the sheath component or has a very low solubility as compared with the sheath component is arranged in a core having a multileaf cross section is spun. Then
After knitting and weaving, it can be obtained by dissolving the sheath component by elution treatment and leaving the core component having a multilobe cross section.

In this elution treatment, it is preferable to completely remove the sheath portion, but the sheath component may remain as long as the effect of the present invention is not impaired. The advantage of using such a method is that the core component is surrounded by the sheath component, so that the core component is prevented from becoming round to reduce the surface tension, and the sharp shape can be maintained. There is something you can do.

From the viewpoint of preventing the core component from becoming round, it is desirable that the polymer used for the sheath component has a higher viscosity than the polymer used for the core component. The yarn cross section before elution of the sheath component may have any shape such as a circle, a square, a flat shape, and a Y shape. However, a circle is preferable from the viewpoint of maintaining the shape of the core component.

The yarn provided by the present invention can be knitted and woven by an ordinary method and dyed by an ordinary method. The fabric structure may have any structure such as twill, taffeta, smooth, tricot, etc. as long as the effect of the present invention is not impaired, but when mixed with other cross-section yarns, a structure in which many yarns provided by the present invention appear on the surface Is preferred. The fabric produced by using the yarn provided by the present invention can be subjected to antistatic, antibacterial, softening, and other known post-processing, if necessary.

[0025]

EXAMPLES Next, the effects of the present invention will be specifically described by way of examples. The measuring method and the calculating method of the evaluation value in the examples are as follows. (1) Water Absorption Vertical / Horizontal Each was measured according to JIS L 1096 "General woven fabric test method" by Rec method. (2) Silicone oil SH200 (Toray
5 ml of Dow Silicone Co., Ltd.)
A sample cloth (sample) fixed with a 1 mm-thick woven fabric on a bottom surface of a cylindrical weight having a diameter of 45 mm and a weight of 1 kg was placed on a glass plate, moved at a speed of 1 m / min, and dropped. The silicone oil was wiped off. Next, it is sprinkled on a glass plate with a toner for dry copying (SF-76T: manufactured by Sharp Corporation), and the toner is uniformly applied to the glass plate from a position at a height of 5 cm from the glass plate while maintaining the height from the glass plate. Blowing compressed air of 9.8 N / cm ² for 10 seconds so as to match. Then, an adhesive tape was attached to the glass plate, the remaining toner was transferred from the glass plate to the adhesive tape, and the amount of the transferred toner was evaluated as follows.

Almost no toner remains: ○ A little remains: △ Very much remains: × (3) Visual evaluation of fluff A sample cloth (sample) is cut into 20 cm × 30 cm,
A sample cloth is wound around and fixed to the side surface of an aluminum cylinder having a bottom having a diameter of 10 cm. This cylinder is installed so that the side surface is horizontal to the ground, a lamp is installed so that the sample cloth is irradiated with light from an angle of 45 degrees, and the cylinder is rotated and visually observed, and cut into 20 cm x 30 cm. The number of fluffs (number / 600 cm ² ) of the sample cloth was counted. (4) Softness The sample was left for 2 hours in a room adjusted to a temperature of 25 ° C. and a humidity of 50%, and 10 persons were subjected to a sensory evaluation of the softness of the knitted fabric. The evaluation is as follows.

Very soft: 2 points Soft: 1 point Not soft: 0 points (5) Soft feeling Leave for 2 hours in a room adjusted to a temperature of 25 ° C and a humidity of 50%, and feel soft The sensory evaluation was performed on 10 persons. The evaluation is as follows.

Fairly dry: 2 points Smooth: 1 point There is a slimy feeling: 0 point (6) Dye with a dark color density of 3% owf Nylosan Blue N-
GFL 167% (manufactured by Clariant Japan Co., Ltd.)
Is completely exhausted to the fabric, and the spectrocolorimeter CM-3600d
The L value was measured by (Minolta Co., Ltd.).

Example 1 Nylon 6 was melt-discharged at a weight ratio of 30:70 and a spinning temperature of 290 ° C. by using a spinneret designed to have an octalobal core and polyethylene terephthalate in a sheath. Then, after cooling, refueling, and entanglement, it is collected with a non-heating roller, 16
It was stretched 1.4 times with a roller heated to 0 ° C. and wound at a winding speed of 4000 m / min to obtain a 56-decitex, 18-filament core-sheath composite yarn having the shape shown in FIG.

The obtained yarn was warped to woven a woven fabric having a reed density of 70 and a density of 75 yarns / cm and a width of 42 yarns / cm. This was spread and scoured and then set at 180 ° C., and then 30 g / L of sodium hydroxide and 3 g / L of DYK1125 (manufactured by Yatasha Yushi Kogyo Co., Ltd.) were used to completely dissolve the polyester corresponding to the sheath portion. After dyeing at 80 ℃,
Finishing set at 160 ℃, vertical density 89 / c
m, horizontal 48 taffeta / cm was obtained. The dye is Nylo
San Blue N-GFL 167% (made by Clariant Japan Co., Ltd.) was used. Table 1 shows the water absorbency, wipeability, and visual evaluation of fluff of the obtained taffeta.

Examples 2 to 4 By changing the shape of the hole through which the core component of the spinneret is spun when spinning the raw yarn, and changing the weight ratio of the core-sheath composite ratio, α, r, a
_{The max} , N, and Σ2S _i / K _i L _i N are changed as shown in Tables 1 and 2. Others were the same as in Example 1.

Example 5 Nylon 6 was melted and discharged at a spinning ratio of 290 ° C. at a weight ratio of 30:70 using a spinneret designed to have an octalobal core and polyethylene terephthalate in a sheath. Then, after cooling, refueling, and entanglement, it is collected with a non-heating roller, 16
It was stretched 1.4 times with a roller heated to 0 ° C. and wound at a winding speed of 4000 m / min to obtain a 56-decitex, 18-filament core-sheath composite yarn having the shape shown in FIG.

Nylon 6 yarn of 33 decitex 10 filaments was used as the warp yarn, and after warping the yarn obtained by the above method, it was used as the weft yarn and the density warp 63 yarns / c
A twill of 73 m / horizontal / cm was woven. After spreading and scouring this, set it at 180 ° C, then add sodium hydroxide 3
The polyester corresponding to the sheath portion of the weft yarn was completely dissolved by using 0 g / L and DYK1125 (manufactured by Yatasha Yushi Kogyo Co., Ltd.) 3 g / L. 160 after dyeing at 80 ℃
Finishing set was performed at 0 ° C. to obtain a woven fabric having a density length of 69 pieces / cm and a width of 85 pieces / cm. The dye is Nylosan B
lue N-GFL 167% (made by Clariant Japan Co., Ltd.) was used. Table 3 shows the softness, dryness and darkness of the obtained woven fabric.

Examples 6 to 8 When the core-sheath composite yarn used for the weft yarn is spun, the shape of the hole from which the core component of the spinneret is discharged is changed, and the composite ratio of the core-sheath is changed to α. , R, a _max , N, Σ2S _i / K _i L _i N are changed as shown in Tables 3 and 4. Others were the same as in Example 1.

Comparative Examples 1-2 When the shape of the hole in which the core component of the spinneret is spouted when spinning the raw yarn is changed, and the composite ratio of the core-sheath is changed by the weight ratio, α, r, a
_{The max} , N, and Σ2S _i / K _i L _i N are changed as shown in Tables 1 and 2. Others were the same as in Example 1.

Comparative Example 3 In the same manner as in Example 1, spinning of raw yarn and weaving were performed. After spreading and scouring, and setting at 180 ° C, 10 g / L of sodium hydroxide was used to dissolve the polyester in the sheath portion in an amount corresponding to 4% by weight of the woven fabric, and nylon in the core portion and polyester in the sheath portion were dissolved. Is divided into.

Comparative Example 4 Nylon 6 was melted and discharged at a spinning temperature of 260 ° C., cooled, oiled, entangled, taken up by a non-heated roller, and stretched 3.0 times with a roller heated at 150 ° C. , Winding speed 3
Winding at 500 m / min, 56 decitex, 18
A filament cross-section yarn was obtained.

The obtained yarn was warped to woven a woven fabric having a reed density of 70 and a density of 75 yarns / cm and a width of 42 yarns / cm. After spreading and scouring this, set it at 180 ° C and then 80
After dyeing at ℃, finishing set at 160 ℃, to obtain a taffeta of 86 vertical density / cm, horizontal 50 / cm.

Comparative Example 5 When the core-sheath composite yarn used for the weft yarn was spun, the shape of the hole through which the core component of the spinneret was discharged was changed and the composite ratio of the core-sheath was changed to α, r. , A _max , N, Σ2S _i / K _i L _i N are changed as shown in Tables 3 and 4. Others were the same as in Example 5.

Comparative Example 6 In the same manner as in Example 5, spinning of raw yarn, warping and weaving were performed. This was spread and scoured and then set at 180 ° C. Then, using 10 g / L of sodium hydroxide, the polyester which is the sheath portion of the core-sheath composite yarn used for the weft yarn is 4% of the weft yarn weight.
The amount corresponding to is melted and the core portion and the sheath portion of the weft yarn are divided.

Comparative Example 7 Nylon 6 was melted and discharged at a spinning temperature of 260 ° C., cooled, oiled, entangled, taken up by a non-heated roller, and stretched 3.2 times with a roller heated at 150 ° C. , Winding speed 3
Winding at 800m / min, 33 decitex, 10
A filament cross-section yarn was obtained.

The obtained yarn was warped, and a woven fabric having a reed density of 70 and a density of 62 threads / cm and a width of 70 threads / cm was woven. After spreading and scouring this, set it at 180 ° C and then 80
After dyeing at ℃, finish set at 160 ℃, to obtain a taffeta of density vertical 69 / cm, horizontal 83 / cm.

[0043]

[Table 1]

[0044]

[Table 2]

[0045]

[Table 3]

[0046]

[Table 4]

As is clear from Table 1, the woven fabrics obtained in Examples 1 to 4 were excellent in water absorbability and wiping property, and had almost no fluff. On the other hand, in Comparative Example 1, Σ2S _i / K _i
L _i N was out of the proper range, the wiping property was poor, and the water absorption was insufficient. In Comparative Example 2, a _max / r was out of the proper range, and the wiping property and water absorption were also insufficient. In Comparative Example 3, only 4% by weight of the sheath component was dissolved, so that the sheath portion was sufficiently left, and the core portion and the sheath portion were sufficiently divided, so that many fluffs were present. In Comparative Example 4, the wiping property and the water absorption were insufficient because of the round cross section.

As is clear from Table 3, the woven fabrics obtained in Examples 5 to 8 were excellent in softness and had a dry feel. In Comparative Example 5, Σ2S _i / K _i L _i N was out of the proper range, and the feeling of dryness was insufficient. Comparative Example 6
Since the sheath component was only dissolved by 4% by weight, the sheath portion was sufficiently left, and the core portion and the sheath portion were sufficiently divided, so the diffused reflection of light was high and the L value was high. Sufficient darkness was not obtained. In Comparative Example 7, since the yarn has a round cross-section, the soft feel and the dry feel were insufficient.

[0049]

EFFECTS OF THE INVENTION By using the cross-sectioned yarn of the present invention, a fluff-free cloth excellent in water absorbability and wiping property was obtained. In addition, when used for clothing, since there are few contact points between the cloth and the skin, it is possible to obtain a cloth having a soft touch and a soft texture.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of the cross-sectional shape of a multi-lobed cross-section yarn provided by the present invention, (a) showing 8 lobes and (b) showing 6 lobes.

FIG. 2 is a transverse cross-sectional view for explaining the symbols indicating the cross-sectional shape of the multi-lobed cross-section yarn defined in the present invention, (a) showing 8 lobes
(B) shows an example of 6 leaves.

FIG. 3 is a transverse cross-sectional view for explaining symbols indicating the leaf portion shape of the multi-lobed cross-section yarn defined in the present invention.

FIG. 4 is a schematic cross-sectional view of a core-sheath composite yarn used in an example of the present invention.

[Explanation of symbols]

1: leaf

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) D06M 11/38 D01F 8/12 Z // D01F 8/12 D06M 101: 36 D06M 101: 36 9/04 F Terms (reference) 4L031 AA20 AB05 AB10 BA11 CA01 DA00 DA08 4L035 BB31 DD02 EE05 FF07 4L041 AA07 BA02 BA05 BA21 BA24 BA32 BA33 BA38 BC20 CA06 CA21 EE05 EE15 4L045 AA05 BA03 BA11 BA18 CB18 4L048 A20A20A20A20A20A20A20A20A22

Claims (6)

[Claims] 1. A cross-section is a shape having three or more leaves having an angle α of 90 ° or less between the apexes of the leaves, and the following (1) to
A filament yarn having a multi-lobed cross section, which satisfies the formula (2). (1) 0.5r ≦ a _max (where r is the circumscribed circle radius of the filament cross section,
Two points B _i that each leaf of the filament cross section shares with the adjacent leaf
The longest line segment connecting C _i (common to C _i -1) and C _i (common to B _{i + 1} ) at each vertex T _i of each leaf is defined as a _max . ) (2) Σ2S _i / K _i L _i N ≦ 1.5 (However, two points B _i (common to C _i −1) and C _i (B _{i that} each leaf of the filament cross section constitutes an adjacent leaf) the length of the line segment B _i C _i connecting ₊₁ common) and K _i, the area of a portion where each leaf is cut at the line segment B _i C _i S _i, the apex of each leaf and the line segment B _i C the _i distance was L _i. also the number of leaves with the filament cross section was N.) 2. A filament yarn having a multi-lobed cross section according to claim 1, which is composed of a polyamide fiber. 3. The multilobe filament yarn according to claim 1, which is produced by dissolving a core-sheath type composite yarn. 4. The filament yarn having multi-lobed cross-section according to claim 3, wherein the core component is polyamide and the sheath component is polyester. 5. A fabric comprising the filament yarn having a multi-lobed cross section according to any one of claims 1 to 4. 6. A wiping cloth using the cloth according to claim 5.