Composite yarn and textile fabric

Abstract

The invention is a composite yarn fabricated by double-twisting a S-twisted single yarn and a S-twisted single yarn in a Z-twisting mode in a ratio of from 100% to 300% of the count of twist of the S-twisted single yarns, or a textile fabric.

Description

FIELD OF THE INVENTION

The present invention relates to a composite yarn of good wrinkle proof, and to a textile fabric of good wrinkle proof which comprises it.

BACKGROUND ART

Heretofore known is a general composite yarn fabricated by giving a final twist to a primary-twisted single yarn in the direction opposite to the direction of the primary twist thereof in a ratio of about 60% of the count of the primary twist. The wrinkle proof of a textile fabric comprising general composite yarn does not differ from that of a textile fabric comprising general single yarn. Therefore, for improving the wrinkle proof of textile fabrics, resin processing is known, which, however, is problematic in that the processed textile fabrics may have a rough feel.

Also known is a two-ply voile yarn fabricated by giving a final twist to a primary-twisted single yarn in the same direction as that of the primary twist thereof in a ratio of about 60% of the count of the primary twist. The wrinkle proof of a textile fabric comprising the two-ply voile yarn does not also differ from that of a textile fabric that comprises general single yarn. The voile yarn is not preferred in some applications since it may feel coarse and stiff.

When two or more woolen single yarns are twisted, Patent Document 1 mentioned below discloses a yarn fabricated by giving a final twist to a primary-twisted single yarn in the direction opposite to the direction of the primary twist thereof in a ratio of from about 100% to 300% of the count of the primary twist. However, the yarn may have a soft feel since the cross section of the woolen yarn is circular, and it is limited to wool but there is shown no intention regarding wrinkle proof.

[Patent Document 1]

JP-A 8-246281

DISCLOSURE OF THE INVENTION

<1> An object of the invention is to obtain a yarn of good wrinkle proof.

<2> An object of the invention is to obtain a comfortable material of good texture.

<3> An object of the invention is to obtain a textile fabric of good wrinkle proof.

<1> The invention relates to a composite yarn fabricated by double-twisting a S-twisted (left-hand twisted) single yarn and a S-twisted single yarn, which is double-twisted in a Z-twisting mode (right-hand twisting mode) in a ratio of from 100% to 300% of the count of twist of the S-twisted single yarns.

<2> The invention relates to a composite yarn fabricated by double-twisting a Z-twisted single yarn and a Z-twisted single yarn, which is double-twisted in a S-twisting mode in a ratio of from 100% to 300% of the count of twist of the Z-twisted single yarns.

<3> The invention relates to a textile fabric which comprises, at least as the warp or the weft thereof, a composite yarn fabricated by double-twisting a S-twisted single yarn and a S-twisted single yarn in a Z-twisting mode in a ratio of from 100% to 300% of the count of twist of the S-twisted single yarns.

<4> The invention relates to a textile fabric which comprises, at least as the warp or the weft thereof, a composite yarn fabricated by double-twisting a Z-twisted single yarn and a Z-twisted single yarn in a S-twisting mode in a ratio of from 100% to 300% of the count of twist of the Z-twisted single yarns.

DETAILED DESCRIPTION OF THE INVENTION

The invention has the following advantages.

<1> The invention provides a yarn of good wrinkle proof.

<2> The invention provides a comfortable material of good texture.

<3> The invention provides a textile fabric of good wrinkle proof.

The invention is described in detail as follows.

<1> Composite Yarn:

The composite yarn of the invention is one fabricated by double-twisting a S-twisted single yarn and a S-twisted single yarn in a Z-twisting mode in a ratio of from 100% to 300%, preferably from 100% to 200% of the count of twist of the S-twisted single yarns (this is hereinafter referred to as “SS composite yarn”). Another composite yarn of the invention is fabricated by double-twisting a Z-twisted single yarn and a Z-twisted single yarn in a S-twisting mode in a ratio of from 100% to 300%, preferably from 100% to 200% of the count of twist of the Z-twisted single yarns (this is hereinafter referred to as “ZZ composite yarn”).

Regarding the double-twisting percentage, if it is smaller than 100%, then the yarn will be equivalent to ordinary double-twisted yarn; but if larger than 300%, then the strength of the yarn may lower.

Accordingly, the composite yarn of the invention has good wrinkle proof (hardly creased), and it has a good feel and looks solid.

The single yarn as referred to herein is meant to indicate one yarn fabricated by spinning and S-twisting or Z-twisting fibers. The single yarn that has been twisted up in a S-twisting mode is referred to as “S-twisted single yarn”; and the single yarn that has been twisted up in a Z-twisting mode is referred to as “Z-twisted single yarn”. S-twisting as referred to herein means that, when the twisted yarn is stretched vertically, its twist line runs from the left upper side to the right lower side. Contrary to this, Z-twisting means that, when the twisted yarn is stretched vertically, its twist line runs from the right upper side to the left lower side.

The material of the single yarn for use in the invention is not specifically defined so far as it can be double-twisted as in the invention. For example, it includes natural fibers such as cotton, hemp, wool, and chemical fibers such as rayon, tencel, polyester; and natural fibers and chemical fibers are preferred. The thickness of the single yarn is not also specifically defined so far as it enables double-twisting as in the invention.

The double-twisting method in the invention includes a method of giving a final S-twist to a few Z-twisted single yarns, and a method of giving a final Z-twist to a few S-twisted single yarns. Preferably, the number of the single yarns is 2.

<2> Textile Fabric:

A woven or knitted textile fabric may be produced by the use of the SS composite yarn or of the ZZ composite yarn. At least any one of the warp or the weft of the textile fabric is the SS composite yarn or the ZZ composite yarn. In this, the remaining warp or weft is not specifically defined so far as it does not detract from the quality of the SS composite yarn or the ZZ composite yarn therein, and any ordinary natural fibers and chemical fibers may be used for it. Two types of the SS composite yarn and the ZZ composite yarn may be employed in such a manner that the SS composite yarn is for the weft and the ZZ composite yarn is for the warp.

EXAMPLES

The invention is described in more detail with reference to the following Examples, which, however, are illustrated herein merely to be of some help in easily understanding the invention, and the invention should not be limited to these Examples.

<1> ZZ Composite Yarn

Example 1

A ZZ composite yarn is fabricated, for example, by giving a final S-twist to two Z-twisted single yarns of cotton count of 100.

A general composite yarn is fabricated by giving a final S-twist (in a ratio of about 60%) to two S-twisted ordinary yarns of cotton count of 50.

<2> Textile Fabric:

A fabric 1 of the invention in which the warp and the weft are the ZZ composite yarn is fabricated; and a general fabric 1 in which the warp and the weft are the general composite yarn is fabricated. These are processed for SS high-natural finish (finish with liquid ammonia), and the properties of the resulting plain weave fabrics are shown in Table 1.

The fabrics (SS high-natural finish) of the ZZ composite yarn of Example 1 are described. The wrinkle proof of the fabric 1 of the invention is 273° (in dry) and 256° (in wet); while that of the general fabric 1 is 246° (in dry) and 223° (in wet). This confirms the superiority of the fabric 1 of the invention in the wrinkle proof thereof. The W & W grade of the fabric 1 of the invention is 2.8; while that of the general fabric 1 is 2.2. This confirms the superiority of the fabric 1 of the invention.

To that effect, the fabric 1 of the invention is better than the general fabric 1 in point of the data of the wrinkle proof and the W & W grade thereof. The fabric 1 of the invention looks solid and has a good drape-like feel.

The wrinkle proof is determined according to JIS L 1096 B (Monsanto process) and as follows: The fabric is folded in two by applying a load thereto. Then, the load is removed, and the recovered angle of the folded part is read in the machine direction and in the cross direction. The data of the angle in the machine direction and that in the cross direction are summed up, and this indicates the wrinkle proof of the fabric.

	TABLE 1
	Tested Fabrics (Example 1)
	Fabric 1 of the
	invention	General Fabric 1
	Warp: ZZ	Warp: general
	composite yarn	composite yarn
	Weft: ZZ	Weft: general
Tested Items	composite yarn	composite yarn
Density (/inch)	131 × 93	154 × 82
warp × weft
Tear Strength	cross	1620	1350
(g)	direction
Tensile	machine	46.5	42.3
Strength (g)	direction
W & W (grade)	2.8	2.2
wrinkle proof	in dry	273	246
(°)	in wet	256	223
Slippage (mm)	cross	0.8	1.6
5 kg	direction

• Tear Strength: Measured according to JIS L 1096, method A for tensile strength and elongation (labeled strip method).
• Tensile Strength: Measured according to JIS L 1096, method D for tear strength (pendulum method).
• W & W (grade): wash-and-wear grade.
• Slippage: Measured according to JIS L 1096, seam slippage method B for slippage resistance.
  <3> ZZ Composite Yarn

Example 2

A ZZ composite yarn is fabricated, for example, by giving a final S-twist to two Z-twisted single yarns of cotton count of 80; and another ZZ composite yarn is by giving a final S-twist to two Z-twisted single yarns of cotton count of 60.

A general composite yarn is fabricated by giving a final twist to two yarns of cotton count of 80; and another general yarn is by giving a final twist to two yarns of cotton count of 60.

<4> Textile Fabric:

A fabric 2 of the invention is fabricated, in which the warp and the weft are the ZZ composite yarns of Example 2; and a general fabric 2 is fabricated, in which the warp and the weft are the general yarn fabricated by giving a final twist to two yarns of cotton count of 80 and the general composite yarn fabricated by giving a final twist to two yarns of cotton count of 60. These are processed for super-wrinkle proof finish with liquid ammonia (finish with liquid ammonia+resin (SSP (registered trade name) finish)), and the properties of the resulting plain weave fabrics are shown in Table 2.

The fabric of the ZZ composite yarns of Example 2 is described. The wrinkle proof of the fabric 2 of the invention is 304° (in dry); while that of the general fabric 2 is 287° (in dry). This confirms the superiority of the fabric 2 of the invention. However, the wrinkle proof in wet of the two is the same. The W & W grade of the fabric 2 of the invention is 3.4; while that of the general fabric 2 is 3.2. This confirms the superiority of the fabric 2 of the invention. The formalin content of the fabric 2 of the invention is 23 (ppm); while that of the general fabric 1 is 29 (ppm). This means that the formalin content of the fabric 2 of the invention is smaller. To that effect, the fabric 2 of the invention is better than the general fabric 2 in point of the data of the W & W grade and the wrinkle proof thereof. When taken hold of, the fabric 2 of the invention is hardly creased, and regarding its texture, it has a silky feel and looks solid, different from a voile fabric.

	TABLE 2
	Tested Fabrics (Example 2)
	Fabric 2 of the
	invention	General Fabric 2
	Warp: ZZ	Warp: general
	composite yarn	composite yarn
	Weft: ZZ	Weft: general
Tested Items	composite yarn	composite yarn
Density (/inch)	128 × 66	124 × 60
warp × weft
Tear Strength	cross	820	1470
(g)	direction
Tensile	machine	27.7	31.3
Strength (g)	direction
W & W (grade)	3.4	3.2
wrinkle proof	in dry	304	287
(°)	in wet	277	277
Slippage (mm)	cross	0.6	2.6
5 kg	direction
Formalin (ppm)		23	29

While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.

This application is based on a Japanese patent application filed Sep. 30, 2003 (Japanese Patent Application No. 2003-341097), the entire contents thereof being hereby incorporated by reference.

Claims

1. A composite yarn fabricated by double-twisting a S-twisted single yarn and a S-twisted single yarn, which is double-twisted in a Z-twisting mode in a ratio of from 100% to 300% of the count of twist of the S-twisted single yarns.

2. A composite yarn fabricated by double-twisting a Z-twisted single yarn and a Z-twisted single yarn, which is double-twisted in a S-twisting mode in a ratio of from 100% to 300% of the count of twist of the Z-twisted single yarns.

3. A textile fabric which comprises, at least as the warp or the weft thereof, a composite yarn fabricated by double-twisting a S-twisted single yarn and a S-twisted single yarn in a Z-twisting mode in a ratio of from 100% to 300% of the count of twist of the S-twisted single yarns.

4. A textile fabric which comprises, at least as the warp or the weft thereof, a composite yarn fabricated by double-twisting a Z-twisted single yarn and a Z-twisted single yarn in a S-twisting mode in a ratio of from 100% to 300% of the count of twist of the Z-twisted single yarns.