JP2846321B2 - Polyamide covering yarn - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a polyamide covering yarn used for thin clothing which is elegant, rich in gloss, fits on the body, and easily moves the body.

(Prior Art) In general, most covering yarns using an elastic yarn as a core yarn use a false twist yarn of a polyamide yarn for the winding yarn.

(Problems to be Solved by the Invention) Recently, consumers' demands for clothing have been diversified in fashion, with elegant gloss and rich body,
A thin material that is easy to move the body is desired. As a material used for clothing that meets such requirements, it can be said that it is most suitable to use polyamide filament covering yarn as it is in the form of raw yarn. The covering yarn is
Due to its performance, it is difficult to obtain a fine balance between the core yarn and the winding yarn when using a conventional polyamide filament yarn as it is, because the winding yarn is covered with the elastic yarn that has been stretched several times. For this reason, when the wound structure is uneven, or when a knot is generated due to the application of external force and knots occur, a part of the wound yarn is easily displaced, and the elastic yarn has a defect that generates a bare part that is not covered with the winding yarn. It will be connected. As a measure to prevent these drawbacks, the reality is that polyamide false twisted yarn is used for winding to improve the familiarity. However, the covering yarn using a polyamide false twist yarn as the winding yarn loses its gloss due to the fine crimping of the false twist yarn, and does not become a thin cloth garment rich in gloss required by consumers. An object of the present invention is to improve the lack of luster of conventional false twist yarns, to enhance elegant luster, to provide a uniform winding structure, to provide excellent coverage, to fit the body, to move the body easily, and to provide a single covering that is thin and flexible. In providing yarn.

(Means for Solving the Problems) The present invention relates to a single covering yarn using an elastic yarn as a core yarn and a polyamide filament yarn as a winding yarn, wherein the winding yarn is spun and stretched at a spinning speed of 4000 m / min or more. Polyamide covering yarn for thin garment, as taken, a multifilament yarn having a filament fineness of 1.2 denier or less, a Young's modulus of 250 kg / mm ² or less, and an elongation of 50% or more. , And the gist.

 Hereinafter, the configuration and operation of the present invention will be described in detail.

In the present invention, the elastic yarn refers to a polyurethane elastic yarn, a rubber yarn, or the like, and the winding yarn refers to a yarn wound around and covered around a core yarn. The Young's modulus and elongation of the wound yarn are obtained by reading the Young's modulus and elongation at break according to a standard method from a normal strength-elongation curve.

The polyamide covering yarn of the present invention has a Young's modulus of 250 kg /
The object of the present invention can be achieved by using a polyamide filament yarn having an elongation of not more than 50 mm ² which is not more than mm ² .

Young's modulus of conventional polyamide filament yarn 400 g / mm ²
As described above, for an elongation of 35 to 45%, the present invention has a Young's modulus of 250 kg / mm.
By using a yarn having an elongation of ² or less and an elongation of 50% as a yarn, a covering yarn having a glossy and uniform wound structure can be obtained. The polyamide filament yarn used in the present invention may be a yarn obtained at a spinning speed of 4000 m / min or more, or a yarn obtained by changing the conditions of the polymer or the yarn production may be used, and the Young's modulus may be 250 kg / mm.
It is sufficient that the elongation is ² or less and the elongation is 50% or more. Further, the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view showing the principle at the time of manufacturing a covering yarn, where 1 is an elastic yarn of a core yarn, 2 is a winding yarn, and 3 is a winding point. FIG. 2 shows the strength and elongation curve of a polyamide filament yarn. Reference numeral 4 denotes a polyamide filament yarn that has been spun and stretched at 4000 m / min or more and wound up, and 5 is a conventional yarn that has been spun at 1500 m / min and then stretched. The polyamide covering yarn of the present invention has a Young's modulus of a polyamide filament yarn of 250 k.
g / mm ² or less and the elongation of 50% or more are used to easily absorb the fluctuation of the release tension of the elastic yarn and the winding yarn at the winding point 3 to achieve a balanced and uniform winding structure. ,
It is easy to follow the elongation and recovery of the elastic yarn of the core yarn, so that even when an external force is applied, it is possible to obtain an elastic yarn which is hardly displaced and has an integral expansion and contraction behavior. In addition, by using the polyamide filament yarn as it is as a winding yarn, since the winding yarn has no fine crimping, the appearance of the covering yarn has an elegant luster. Further, when the degree of gloss is desired to be adjusted, the present invention can be freely adjusted by changing the cross-sectional shape of the polyamide filament yarn into a triangular or polygonal irregular cross-section. Therefore,
The covering yarn of the polyamide filament yarn according to the present invention is rich in elegant gloss, has a uniform wound structure, and is well coated.

(Examples) Hereinafter, Examples and Comparative Examples of the polyamide covering yarn of the present invention will be described.

Examples 1 and 2 Example 1 uses a polyurethane filament 40d as a core yarn and a polyamide filament yarn 70d / 68f spun at 5,500 m / min with a Young's modulus of 204 kg / mm ^{2 and an} elongation of 65.9% as a winding yarn. 300 threads
% Elongation, and the number of twists of the wound yarn was 800 t / m. In Example 2, a polyurethane elastic yarn was used as the core yarn, 20d, and a Young's modulus was 195 kg / m for the wound yarn.
Polyamide filament yarn 40d / 34f spun at 5500 m / min with m ² and elongation of 62.8%, triangular cross-section yarn, 250% core yarn
And the number of twists of the wound yarn was 1000 t / m.

Above, the yarns obtained in Examples 1 and 2 were used as dyes for Brilliant
Using Acid Blue R 5% owf, the dyed yarn sample was wound on a plate, and the uniformity and gloss of the wound structure of the covering yarn were compared with the naked eye. As a result, as shown in Table 1, the covering yarn of the polyamide filament yarn obtained in the present invention was a yarn having an elegant luster and a good coatability and excellent appearance.

Comparative Examples 1 and 2 Comparative Example 1 uses a polyurethane elastic yarn 40d as a core yarn and a polyamide filament yarn 70d / 68f having a Young's modulus of 456 kg / mm ^{2 and an} elongation of 39.5% as a winding yarn, and elongates the core yarn by 300%. The number of twists of the winding yarn was 800 t / m. Comparative Example 2 used a polyurethane elastic yarn 20d as a core yarn, a polyamide filament yarn 40d / 34f having a Young's modulus of 413 kg / mm ² and an elongation of 46.8% as a winding yarn, and a triangular cross-section yarn.
The core yarn was stretched by 250%, and the number of twists of the wound yarn was 1000 t / m.

The yarns obtained in Comparative Examples 1 and 2 were dyed in the same manner as in Examples 1 and 2, and the results of evaluation and comparison are shown in Table 1. As a result, in each of Comparative Examples 1 and 2, unevenness of the wound structure having uneven coating density was conspicuous, and the yarn also lacked luster.

(Effect of the Invention) The present invention improves the lack of luster of a conventional false twisted yarn and improves the elegant luster by using a polyamide filament yarn having a Young's modulus of 250 kg / mm ² or less and an elongation of 50% or more as a single covering yarn as it is. A thin, flexible covering elastic yarn that is rich in, has a uniform wound structure, is excellent in covering properties, fits on the body, and easily moves the body.

[Brief description of the drawings]

FIG. 1 is a schematic view showing the principle of producing a covering yarn, and FIG.
The figure shows the strength-elongation curve. 1 ... core elastic yarn, 2 ... winding yarn, 3 ... winding point, 4 ...
Thread used in the present invention, 5 ... conventional thread.

Claims (1)

(57) [Claims] 1. A single covering yarn in which an elastic yarn is used as a core yarn and a polyamide filament yarn is used as a winding yarn, and the fineness of the filament is as-wound and stretched at a spinning speed of 4000 m / min or more. Is a multifilament yarn having a denier of 1.2 denier or less, a Young's modulus of 250 kg / mm ² or less, and an elongation of 50% or more.