JP5113112B2 - Synthetic fiber yarn and knitted fabric - Google Patents

Description

  The present invention relates to a synthetic fiber yarn and a woven or knitted fabric that are lightweight and have a tight feeling.

Conventionally, composite yarns made of cellulose fibers and polyester fibers have been developed and used in various garments. Since these composite yarns use polyester fiber multifilaments with low residual elongation, false twisting and twisting are performed. However, the coating layer structure is not formed, and a portion where the cellulose fibers are exposed on the processed yarn surface side is generated. And since a cellulose fiber will be exposed on the fabric surface where this processed thread was used, it had the fault weak to a rubbing and a crack.
As a method for overcoming this disadvantage, in Patent Document 1, a polyester fiber multifilament having a chic and thin structure having an elongation of 80 to 150% and comprising a hollow single yarn having a hollow ratio of 15 to 30% is sheathed. A composite processed yarn is disclosed in which cellulose fiber multifilament is formed as a core yarn component as a yarn component and false twisted. The composite processed yarn has a structure in which a specific hollow polyester fiber forms a coating layer, thereby improving the anti-pilling property and the snacking property and obtaining a cool fabric.
However, since such a composite processed yarn has a two-layer structure of cellulose fibers and polyester fibers, it is difficult to obtain a composite yarn having a high bending rigidity and a tight feeling.

Japanese Patent Laid-Open No. 11-286843

  The present inventors have aimed to solve the above-mentioned problems of the prior art and to obtain a composite yarn made of cellulose fiber and polyester fiber that is lightweight and can provide a tight feeling.

As a result of intensive studies, the present inventors have completed the present invention by combining a specific cellulose fiber and a polyester fiber having a hollow.
That is, the present invention is as follows.
1. A cellulose fiber multifilament containing 1.0 to 4.0 wt% of an inorganic pigment and a polyester fiber multifilament that is a hollow single yarn having a hollowness of 15 to 45% are mixed, and the mixing ratio of the cellulose fiber multifilament is 30 to A synthetic fiber yarn characterized by being 75 wt%.
2. 2. The synthetic fiber composite yarn according to 1 above, wherein the inorganic pigment is carbon black.
3. A knitted or knitted fabric, wherein the synthetic fiber yarn according to 1 or 2 is disposed at least partially.

  The synthetic fiber composite yarn of the present invention is lightweight and has a tight feeling.

Hereinafter, the present invention will be described in detail.
The synthetic fiber yarn of the present invention is a mixture of specific cellulose fiber multifilaments and polyester fiber multifilaments.
In the present invention, examples of the cellulose fiber multifilament include multifilaments such as viscose rayon, polynosic rayon, purified cellulose fiber, and copper ammonia rayon.

  The cellulose fiber multifilament used in the present invention is characterized by containing 1.0 to 4.0 wt% of an inorganic pigment. Inorganic pigments are superior to organic pigments in light resistance and heat resistance, and typical examples include titanium white (white) and carbon black (black). Carbon black is preferable from the viewpoint of bending rigidity described later. The inorganic pigment is kneaded into a cellulose spinning dope and spun to obtain the desired cellulose fiber multifilament. If the content of the inorganic pigment is less than 1.0%, the effect of improving the bending rigidity cannot be exhibited, and the color developability is low, which does not make sense for the original. If it exceeds 4.0%, the spinning suitability is lowered, and a reduction in the strength of the original yarn is induced. Preferably it is 1.5-3.0 wt%.

  Conventionally, a cellulose fiber itself containing an inorganic pigment as a so-called original yarn that colors the yarn itself without a dyeing step is known. However, the present inventor has found that a composite yarn in which a cellulose fiber multifilament containing a specific inorganic pigment is combined with a specific hollow cross-section polyester fiber multifilament can exhibit excellent bending rigidity. It is a thing. The synthetic fiber composite yarn of the present invention has a structure in which a large number of cellulose fiber multifilaments containing an inorganic pigment are present inside the composite yarn and are not exposed to the surface of the composite yarn. In general usage of the original yarn, it cannot be used for the yarn used on the inner side of such a composite yarn.

  The polyester fiber multifilament used in the present invention is characterized by being composed of a single yarn having a hollow cross section with a hollowness ratio of 15 to 45%. Here, the hollow ratio is a percentage of the hollow void portion occupying the area of the single yarn cross section, and the number of voids constituting the hollow portion may be one or plural. The single yarn may have a round cross section or an irregular cross section. The section of the single yarn is an atypical cross section means that the cross section of the single yarn is a non-circular shape having a short shape, a square shape, a triangular shape, a Y shape, a cross shape and the like as a representative example. In the present invention, it is preferable that the polyester fiber multifilament has an irregular shape, in particular, a triangular or Y-shaped cross section in order to give an elegant gloss to the woven fabric.

  The synthetic fiber yarn of the present invention is obtained by mixing the cellulose fiber multifilament and the polyester fiber multifilament. Preferably, each fiber is mixed at the single yarn level. In the present invention, the single yarn of cellulose fiber multifilament and the single yarn of polyester fiber multifilament need to be intertwined at least intermittently. It is preferable that the single yarns are mixed as uniformly as possible, and the single yarns are separated without sticking and contain air between the single yarns.

  Examples of a method for mixing cellulose fiber multifilament yarn and polyester fiber multifilament yarn include an interlace method (air entanglement method) and a method of opening and entanglement by an electric opening method using electrostatic force. In the case of the interlace method, the number of entanglements is preferably 20 or more and 120 or less per 1 m of yarn length from the viewpoint of uniform mixing. More preferably, it is 70 or more and 120 or less. If the number of entanglements is less than 20, the single yarn may not be mixed uniformly. When the number of entanglements exceeds 120, the swelling of the yarn is reduced, which is not preferable.

  In this case, the preferred range of the feed rate and interlace pressure varies depending on the type of cellulose fiber multifilament yarn, the type of synthetic fiber multifilament yarn, the specifications of the device, particularly the shape of the interlace nozzle for air entanglement, but the feed rate is 0.1 to 5% is preferable in the overfeed region, and further 0.5 to 2.0% is more preferable. When the feed rate is lower than 0.1% or under feed, the interlace entanglement becomes insufficient and the feeling of touch may be lowered.

The interlace pressure is preferably 4.9 × 10 ^{4 to} 4.9 × 10 ⁵ Pa, and more preferably 9.8 × 10 ^{4 to} 2.0 × 10 ⁵ Pa. When the feed rate exceeds 5%, the processing tension fluctuates, so that uniform fiber mixing may not be performed. When the interlace pressure exceeds 4.9 × 10 ⁵ Pa, fluff may be generated in the cellulose filament, and the sweat treatment function of the fabric may deteriorate. When the interlace pressure is less than 4.9 × 10 ⁴ Pa, the interlace entanglement becomes insufficient and the feeling of touch may be reduced.

The synthetic fiber yarn of the present invention preferably has a total fineness of 44 to 333 dtex. The more preferable range varies depending on the use, and 167 to 333 dtex is suitable for the outer use, and if it is less than 44 dtex, the tension and waist feeling is insufficient. If it exceeds 333 dtex, it will become thicker, which is not preferable.
The single fiber fineness of the cellulose fiber multifilament is preferably 0.1 to 5.6 dtex, more preferably 2.8 dtex or less, and still more preferably 1.4 dtex or less. When the single yarn fineness of the cellulose fiber multifilament exceeds 5.6 dtex, the touch becomes worse. The single yarn fineness of the polyester fiber multifilament is preferably 0.1 to 5.6 dtex, more preferably 2.2 dtex or less, and still more preferably 1.4 dtex or less. When it exceeds 5.6 dtex, the touch and the touch are unfavorably deteriorated.

Such a synthetic fiber yarn of the present invention can have a high bending rigidity value even if it is relatively fine. The flexural rigidity value is preferably 2.45 × 10 ⁻⁵ Nm or more, and particularly preferably 2.94 × 10 ^{−5 to} 3.92 × 10 ⁻⁵ Nm. Can give a tight feeling.
As the woven or knitted fabric of the present invention, it is sufficient that the synthetic fiber yarn is used for at least a part thereof. For example, a woven or knitted fabric woven and knitted using other fiber materials is also included. The woven or knitted fabric of the present invention is suitably provided for use in clothing that directly touches the skin, and can be suitably used for use in direct contact with skin such as clothing, bedding, towels, and handkerchiefs. Examples of the clothing include outer clothing, inner clothing, pajamas, and socks.

  In the present invention, the method for forming a knitted fabric or a woven fabric is not particularly limited, and the knitted fabric or the woven fabric can be manufactured using a normal knitting machine or a loom. In addition, weaving and knitting with synthetic fibers such as spandex and polyester, and natural fibers such as cotton and silk are also possible. The organization of the knitted fabric includes circular knitted fabrics such as milling, smooth, tengu and kanoko, weft knitted fabrics such as flat knitted fabrics, tricot organizations such as half tricot, two-way and double denby, and raschel organizations such as satin net and triconette. Knitted fabric is used. Examples of the texture of the woven fabric include plain weave, twill weave, satin weave, and its changed structure.

The processing method of the knitted fabric or woven fabric of the present invention is not particularly limited, and may be dyed in addition to whitening by bleaching and bleaching. For example, it may be any method such as a pre-dye method performed in the state of yarn such as cocoons or cheese, that is, a state of composite crimped yarn, a post-dye method performed in the state of knitted fabric or woven fabric, As the dyeing assistant and finishing agent, those that are generally used for dyeing synthetic fibers and / or cellulose fibers that are commercially available can be arbitrarily selected according to the purpose.
Also, when dyeing a knitted or woven fabric, usually scouring, bleaching / bleaching before dyeing, alkali treatment for improving the dyeability of cellulosic fibers, alkali weight reduction performed with polyester fibers, etc. Pretreatment may be performed.

Hereinafter, the present invention will be specifically described by way of examples.
(1) Flexural rigidity Using a KES FB-2 manufactured by Kato Tech, the flexural rigidity is measured. As a specific measurement method, a sample used for measurement was conditioned at 20 ° C. and 65% RH for 24 hours, and then measured using a sample sampled at 20 cm × 20 cm.

[Example 1]
As a cellulose fiber multifilament containing an inorganic pigment, a polyester fiber made of a single yarn having a hollow cross-section using a 84 dtex 45 filament cupra bright yarn [Asahi Kasei Fibers Co., Ltd., Bemberg (registered trademark)] containing 2.5 wt. As a multifilament, a 72 dtex24 filament W-shaped cross-section polyester full dull yarn [Asahi Kasei Fibers, Twin Air (registered trademark)] consisting of a single yarn having a glasses-type hollow (hollow rate 27%) cross section is used. And interlaced to obtain a composite yarn having a cellulose fiber mixture ratio of 54%.
Interlace interlace nozzle: Kyocera KC-AJI-L (1.5mm diameter, propulsion type),
Feed rate: 1.5% overfeed for both filaments,
Air pressure: 1.5 × 10 ⁵ Pa, processing speed: 300 m / min Using the yarn, a milling structure was knitted with a 20 gauge, double circular knitting machine.
The knitted fabric is exposed to a scouring agent and hydrogen peroxide at 80 to 90 ° C for 30 minutes with a liquid dyeing machine, adjusted to pH, washed with water, dried, and then heat set at 170 ° C for 1 minute. The fabric of Example 1 was obtained.

[Comparative Example 1]
A fabric of Comparative Example 1 was obtained in the same manner as in Example 1 except that a 84 dtex 45 filament cupra bright yarn not containing carbon black was used as the cellulose fiber multifilament.

[Comparative Example 2]
The core yarn is made of 84 dtex 45 filament cupra multifilament yarn [Asahi Kasei Fibers Co., Ltd., Bemberg (registered trademark)] containing no inorganic pigment, and the sheath yarn has a POY triangular cross-section with an elongation of 120% and boiling water shrinkage of 73% ( (Hollow rate: 22%) The yarn 66dtex12 filament was drawn through a hot pin at 80 ° C to a draw ratio of 1.3 times, and then subjected to thermal relaxation treatment at 1.3 times in a 130 ° C hollow heater. A thick and thin polyester multifilament yarn was used.
After the core yarn and the thick and thin yarn were mixed, false twisting was performed at a heater temperature of 150 ° C., a twist number of 2450 T / M, and a feed rate of 0%. The obtained mixed fiber false twist yarn was a composite structure false twist yarn in which a thick and thin yarn was highly emphasized around the core yarn to form a coating layer structure.
Using the processed yarn, a milling structure was knitted with a 20 gauge, double circular knitting machine. The knitted fabric is exposed to 80 to 90 ° C for 30 minutes with a scouring agent and hydrogen peroxide in a liquid dyeing machine, adjusted to pH, washed with water, dried, and then heat set at 170 ° C for 1 minute for comparison. The fabric of Example 2 was obtained.
About the above Example and a comparative example, an evaluation result etc. are put together and shown in a table | surface.
The composite yarn of the example has the characteristics that the bending rigidity is high and there is a sense of tension in handling evaluation. On the other hand, the composite yarns of Comparative Examples 1 and 2 have low bending rigidity and lack a tight feeling in handling evaluation.

  The lightweight composite fiber yarn and woven / knitted fabric obtained by the present invention are suitably provided for clothing applications that directly touch the skin, such as clothing, bedding, towels, handkerchiefs, etc. It can be suitably used for applications that directly touch the skin. Examples of the clothing include outer clothing, inner clothing, pajamas, and socks.

Claims (3)

  A cellulose fiber multifilament containing 1.0 to 4.0 wt% of an inorganic pigment and a polyester fiber multifilament that is a hollow single yarn having a hollowness of 15 to 45% are mixed, and the mixing ratio of the cellulose fiber multifilament is 30 to A synthetic fiber yarn characterized by being 75 wt%.   The synthetic fiber yarn according to claim 1, wherein the inorganic pigment is carbon black.   A woven or knitted fabric, wherein the synthetic fiber yarn according to claim 1 or 2 is disposed at least partially.