JP3410515B2 - 2-layer spun yarn - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention uses a thin dr yarn on the sheath side to provide a soft texture, tension, and waist that have never been seen before.
The present invention relates to a composite spun yarn having good process passability.

[0002]

2. Description of the Related Art Conventionally, spun yarns having a multi-layer structure have different heat shrinkage ratios in order to impart softness, bulkiness and warmth.
A method is often used in which staples of different types are mixed and heat-treated after the yarn is formed. However, although the fibers obtained by this method have a warm feeling, they have a problem of being tense and lacking in waist. On the other hand, there is also a type in which a core filament is covered with a sheath short fiber, which is characterized by having strength, stiffness and dimensional stability comparable to those of filament yarn. However, it is squeezed by the folding and rubbing force applied in the knitting and weaving process, the core filament is exposed, and the thread surface has a nep, which impairs the texture and causes stains and the like. Was there.

[0003]

SUMMARY OF THE INVENTION The present invention solves these problems, has a soft feeling not hitherto found, and is
It is to provide spun yarn with excellent waist and dry feeling.

[0004]

The present invention is a spun yarn having a structure in which a core portion is a filament and a sheath portion is covered with a short fiber around the core portion, and a polyester filament having a fineness of 1 dr or more constitutes the core portion. A two-layer spun yarn characterized in that the core portion is coated with polyester short fibers of 1 dr or less containing 1 to 10 wt% of silicon dioxide particles having a primary particle diameter of 0.1 μ or less in the sheath portion and covering the periphery of the core fiber. is there. The core filament of this spun yarn is 10 to 30 wt% with respect to the spun yarn.
It is also characterized by occupying the ratio of.

In the present invention, the filament constituting the core must be a polyester filament yarn of 1 dr or more, preferably 5 dr or more. In the case of a woven or knitted fabric, this is intended to impart tension, waist and dimensional stability. Therefore, polymers other than polyester generally have poor dimensional stability due to stretching and the like, and even polyesters with less than 1 dr are not sufficiently stretched.

Next, the polyester fiber constituting the sheath component contains 1 to 10 wt% of titanium dioxide or silicon dioxide particles having a primary particle diameter of 0.5 μ or less, and more preferably 1 to 8 wt%.
Use the contained one. Here, it is not necessary to specifically limit the polymer to polyester for the sheath component, but it is preferable to use a polyester having the same shrinkage rate and shape stability by using the same polymer as the core component.

Here, as a method of adding titanium dioxide or silicon dioxide to polyester, for example, an average particle size of 0.1 μm is used.
TiO ₂ or silicon dioxide is added to the esterification tank as a mixture (slurry) of ethylene glycol, terephthalic acid, etc., followed by polycondensation and then spinning by a conventional method. Alternatively, after completion of polycondensation, TiO ₂ or silicon dioxide in the form of a powder or a slurry of a dispersion medium is added to a polymer in a process up to a spinneret, spinning is performed, and a fiber is obtained by drawing and crimping. Can be done.

When using these methods, if the particle size of the inorganic particles (TiO ₂ , SiO ₂ ) added exceeds 0.5 μ, not only the stability of the process during spinning and stretching deteriorates, but also the subsequent alkali treatment. When dyed, the effect of gloss and depth of color is reduced.

Therefore, in order to disperse the particles uniformly, improve the processability in spinning and stretching, and increase the depth of color after dyeing, the primary particle size of TiO ₂ or silicon dioxide is 0.5 μm.
Hereafter, it is preferably 0.1 μ or less. Further, in the present invention, the addition amount of TiO ₂ or silicon dioxide is in the range of 1 to 10 wt%, preferably 1 to 8 wt%. When it is less than 1 wt%, the finished woven or knitted fabric has a poor dry feeling, which has been a defect of polyester conventionally. On the other hand, if it exceeds 10 wt%, spinning becomes extremely difficult and the fiber becomes brittle, which is not preferable.

The polyester short fibers of the sheath used in the present invention have a single fiber fineness of 1 dr or less, more preferably 0.
It is an ultrafine denier of 7 dr or less, more preferably 0.5 dr or less. When a fineness of more than 1 dr is used, the excellent texture desired in the present invention cannot be obtained. At 0.7 dr, you can get excellent softness and firmness, firmness, and firmness, and at 0.5 dr, you can get a better softness, although the firmness and stiffness are slightly lower than the former. Yes, by changing the fineness at 1 dr or less, a high-quality spun yarn can be obtained according to each application.

In the spun yarn of the present invention, the core filament is 10 to 30 wt%, more preferably 10 to 20.
It is necessary to occupy the wt% ratio. If the proportion of the core filament is less than 10 wt%, it will be significantly stretched and lack waist, while if it exceeds 30 wt%, it will be stretched when woven or knitted, and the waist will feel good, but will feel stiff and lack a feeling of warmth. . Further, when it exceeds 30 wt%, the number of sheaths decreases and the filament of the core portion easily protrudes in the woven or knitting process or the like, resulting in lack of covering property. If the covering property is poor, problems such as stains due to dyeing occur, which is not preferable.

As the polyester described in the present invention,
A polymer of terephthalic acid or its ester-forming derivative and ethylene glycol or 1,4-butanediol, that is, polyethylene terephthalate or polybutylene terephthalate, or a copolymer containing them as a main component is preferably used. As the copolymerization acid component, aromatic dicarboxylic acids such as isophthalic acid, sulfoisophthalic acid, 5-sodium sulfoisophthalic acid, diphenyldicarboxylic acid, naphthalenedicarboxylic acid, adipic acid, sebacic acid, dodecanenic acid and other aliphatic dicarboxylic acids, An oxycarboxylic acid such as P-oxybenzoic acid or P-β-oxyethoxybenzoic acid is used as the diol component, an aliphatic diol such as 1,3-propanediol or 1,6-hexanediol, or 1,4-bis ( β-oxyethoxy) benzene, polyethylene glycol, polybutylene glycol and the like can be mentioned.

Further, various additives may be added to the polyester within a range not impairing the fiber physical properties. Further, the cross-sectional shape of the fiber is not particularly limited, but a modified cross-section is preferable in order to aim for a dry and soft texture.

[0014]

EXAMPLES The present invention will be described in detail below with reference to examples. The texture evaluations shown in the examples are based on the tactile sensations, and are shown as good (◯), somewhat poor (Δ), and poor (x).

Example 1 Bright type atmospheric pressure dyeable polyester filaments 20d / 1f (circular cross section) were used as the core component, and 0.5 denier atmospheric pressure dyeable polyester short fibers (circular cross section 38m / m cut as the sheath component). , Containing 5 wt% of silicon dioxide) was used to produce a spun yarn with an ester filament mixture ratio of 15%. The spinnability was good and the filament coverage was good. The woven fabric 40/1 produced by this yarn was evaluated. As a result, as shown in Table 1, the woven fabric had a soft feeling and was excellent in tension, waist and dry touch.

[0016]

[Table 1]

Example 2 In producing a woven fabric in the same manner as in Example 1, evaluation was performed by adding a filament fineness of 30d / 6f filament mixing ratio of 11% and titanium dioxide of 3%. As a result, high-quality products having excellent spinnability and texture were obtained (see Table 1).

Comparative Example 1 In producing a woven fabric in the same manner as in Example 1, the short fiber fineness was 0.8d, the filament mixing ratio was 15%, and the silicon dioxide 3 was used.
Evaluation was performed as wt%. As a result, the filaments constituting the core were exposed and the covering property was deteriorated, and the finished woven fabric had a hard feel and lacked a soft feel (see Table 1).

Comparative Example 2 In producing a woven fabric in the same manner as in Example, the short fiber fineness was 0.8d, the filament fineness was 30d / 6f, and the filament mixture ratio was 11%. As a result, the finished woven fabric 20/1 had tension and stiffness, but had poor surface touch (see Table 1).

Comparative Example 3 In producing a woven fabric in the same manner as in Example, the short fiber fineness was evaluated as 2 dr filament fineness was 20 d / 1 f, filament mixing ratio was 1%, and silicon dioxide was 5 wt%. As a result, the finished woven fabric 30/1 lacked in bulkiness and lacked in softness (see Table 1).

Continuation of the front page (56) References JP-A-60-39426 (JP, A) JP-A-60-259647 (JP, A) JP-A-4-11033 (JP, A) JP-A-4-257331 (JP , A) (58) Fields investigated (Int.Cl. ⁷ , DB name) D02G 3 / 04,3 / 36 D01F 6/92 301

Claims (2)

(57) [Claims] 1. A spun yarn having a structure in which a core portion is a filament and a sheath portion is covered with short fibers around the core portion, and has a fineness of 1 dr.
The above polyester filaments constitute the core part, and the sheath part covers the core fiber with 1 dr or less polyester short fibers containing 1 to 10 wt% of titanium dioxide or silicon dioxide particles having a primary particle diameter of 0.5 μm or less. A spun yarn having a two-layer structure characterized in that 2. The core filament is 10 for the spun yarn.
2. The two-soda structured spun yarn according to claim 1, which occupies a ratio of ˜30 wt%.