JPS6328927A - Composite yarn - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a composite yarn made of polyamide multifilament. More specifically, it is a composite yarn made into a mixed fiber yarn by fluid treatment of a polyamide yarn parent or water-absorbing multifilament and a polyamide multifilament with a smaller filament denier.Especially when it is made into a fabric, it has a soft texture. The present invention also relates to a synthetic fiber composite multifilament for weaving and knitting which has water absorption properties.

[Prior Art] A drawback of synthetic fiber yarns is that they have poor water absorbency (hydrophilicity), and polyamide fibers have traditionally been required to have water absorbency as well. However, recently the water absorbency of cotton and wool has attracted attention, and they have been mainly used in fields that require water absorption. However, these products have drawbacks such as hardness when worn, stickiness when absorbing water, and loss of shape, and the development of a yarn that satisfies these requirements is awaited.

In response to this request, Japanese Patent Application Laid-Open No. 60-17142,
Bulky blended yarns have been proposed in which polyamide filaments are graft-polymerized with acrylic acid and air-mixed with polyester filaments. However, although fabrics using this mixed fiber yarn are certainly improved in terms of moisture absorption and comfort, the manufacturing process is complicated and expensive. That is, a step of graft polymerizing acrylic acid to the spun polyamide multifilament, a step of air blending, and a hot water treatment step are required.

In addition, various types of water-absorbing fibers have been proposed so far,
For example, the polyamide fiber shown in Example 1 of Japanese Patent Publication No. 58-44765 does indeed have good hygroscopicity, but after absorbing moisture due to sweat etc., it inevitably feels sticky.

[Object of the Invention] An object of the present invention is to provide an inexpensive composite yarn that not only has excellent hygroscopicity and does not feel sticky when absorbing moisture, but also does not easily lose its shape.

[Structure of the Invention] According to the present invention, 3,6-dioxaoctamethylene diamine is copolymerized, and the thickness is 1.56/f to 4.5 d.
Provided is a composite yarn characterized in that at least a core yarn is made of a water-absorbing polyamide filament having a diameter of 1.5 d /f, and a polyamide filament having a thickness of 1.5 d /f or less is arranged as a regular thread. The composite yarn of the present invention will be explained with reference to the accompanying drawings.

FIG. 1 is a side view showing an example of an interlace blend yarn with a core yarn made of water-absorbing polyamide filaments. In this figure, the polyamide filament 2, which is slightly over-fed and has a smaller denier than the water-absorbing polyamide filament 1, is located relatively outside and forms a regular system. Furthermore, A is an entangled portion, and B is an unentangled portion where the filaments protrude and play the role of a so-called normal system. If the interlaced fibers are simply drawn together, the fibers will simply be mixed randomly, and it will not be possible to obtain the so-called soft-touch texture.

FIG. 2 shows an example of a composite yarn using the same yarn usage as in FIG. 1, but using a two-feed tuslan yarn with a low overfeed rate. This is because filament 2, which forms the normal line, is overfed by 6% over filament 1, which is the core yarn, and together with the formation of minute loops by the former, it has cotton-like water absorption, soft touch, and silk. It is a polyamide yarn composite yarn with a similar luster. Third
The figure shows two cases with a higher overfeed rate than in the case of Fig. 2.
An example of feedtaslan is shown. In this case, the filament 2 forming the regular system was overfed by 15% with respect to the core yarn. Although it is slightly inferior in terms of luster, it is rich in bulk and exhibits cotton-like water absorption and texture.

For this purpose, the denier of the water-absorbing polyamide filament serving as the core yarn is 1.5 d/f to 4.5 d/f.

The denier of the regular polyamide filament is 1.5
It is important that it be below dir.

Here, increasing the fineness of the water-absorbing filament (single fiber) serving as the core thread is useful from the viewpoint of ensuring firmness and preventing deformation when made into a fabric.

If the denier is less than 1.5 d/f, the composite yarn as a whole will be too soft, and if it exceeds 4.5 d/r, it will be too hard. On the other hand, the normal line is set to 1.5 de at most because the thinner the de, the softer the touch.

In addition to the above-mentioned functions, this water-absorbing polyamide is particularly suitable for eliminating sticky feeling, such as 3,6-dioxaoctamethylenediamine (H2N(E-CHz) 20 CH2-CH2
A polyamide obtained by copolymerizing a salt of 0(-CH2)2NH2) and a dibasic acid such as adipic acid is preferably used. It is sufficient that the above-mentioned diamine is usually copolymerized with 5 to 12% polyamide. An example of this polymerization method is as follows.

3.6-dioxaoctamethylenediamine 40009
.

Adipic acid 33409 and ε-caprolactam 4100
After mixing 09 and putting it into the 10041 reaction layer, steam pressure 3, FJy / ci G, temperature 255 ° C for 3 hours.
Stir. After that, the pressure was purged for 1 hour and 51/mi
Dispense the polymer while stirring under nitrogen flow at n.

After discharge, it is made into chips, extracted and dried according to a conventional method.

On the other hand, the regular filaments are those that do not have water absorption or have substantially lower water absorption than the core yarn, and usually flat yarns that are not imparted with water absorption are used.

As mentioned above, the core yarn and regular yarn need to be interlaced or 2-feed taslan processed, rather than being drawn or twisted.

Here, in the interlace mixed fiber, it is desirable that the regular component is over-fed by 1% to 3% with respect to the core yarn. That is, when it is made into a woven or knitted fabric, its texture is mostly due to the normal characteristics. Incidentally, if the overfeed exceeds 3%, it is substantially difficult to perform the fiber mixing process. In view of this, it is more desirable to employ two-feed taslan processing. In this case, the overfeed amount of the regular system for the core yarn can be easily increased, which is useful when bulkiness is also required. It is appropriate that the amount of overfeed in the regular system relative to the core yarn be approximately 5% to 15%.

[Function/Effect] In order to make textile products hygroscopic, it is natural to use hygroscopic polyamide fibers that are improved from ordinary polyamides, but if hygroscopic polyamide alone is used in woven or knitted fabrics, it will suffer from the drawbacks mentioned above. There is. Therefore, the present invention completely eliminates the drawbacks of the conventional filaments by combining a hygroscopic polyamide filament and a normal poamide filament having a lower hygroscopicity, and by disposing as much hygroscopic polyamide as the core thread. .

Therefore, when the composite yarn according to the present invention is used for the warp or weft of textiles or warp and weft, or when used for knitting, it exhibits water absorbency similar to cotton or wool, and is less likely to become sticky or lose its shape when water is absorbed. What's more, you can get a soft texture with a cotton-like dry touch due to the effect of regular multifilament.

Example 1 A 40de/12fil water-absorbing nylon filament was used as the core component, and 40de/12fil was used as the sum component.
Two-feed taslan processing was performed using a 68-fit nylon-6 filament. The water-absorbing filament was obtained from a polyamide consisting of 3.6-dioxaoctamethylenediamine a (wt%), adipic acid (7.7%), and ε-caprolactam (84.31%). The processing take-off speed is 400TL/min, and the supply speed of the core yarn component to the nozzle is 4207F1. /min, and the feed rate of the normal component was 450TrL/min. In this case, the overfeed of the core yarn is 5%, and that of the regular component is 1.
2.5% [i.e., normal overfeed (OF%
) Hao F = ((450-400> / 400
)xlOO(%) Therefore, the normal line is overfeeded by 7.5% with respect to the core yarn. Using this composite yarn, a fabric with a density of 210 yarns in both warp and weft was fabricated. The water absorption of the fabric is 20℃ x 65
The water absorption of polyamide in general is 7.2% at %RH (4.2%
) was much better.

Furthermore, when the moisture-absorbed fabric was subjected to a sensory test, it did not feel sticky and had a soft touch texture.

Example 2 The same polyamide multifilament used in Example 1 was used as the regular component, and the feeding speed was 480 m/min.
The processing was carried out with an overfeed of 20% and an overfeed of 15% for the core yarn. The composite yarn obtained here was almost the same as that of Example 1 except that it had more bulk.

Example 3 The same polyamide multifilament used in Example 1 was used as a core yarn, and interlace processing was performed at a feeding rate of 405 TrL/min and a normal feeding rate of 41077 L/min.

In this case, the normal overfeed is 1.
It is 5%.

In this case, since it was an interlace mixed fiber, the obtained composite yarn had slightly poor bulkiness, but had water absorbency, a soft texture, and a silk-like luster.

[Brief explanation of the drawing]

FIGS. 1 to 3 are side views showing examples of composite yarns according to the present invention. 1... Water-absorbing polyamide filament 2...
...Normal (non-water-absorbing) polyamide filament A...Interlaced portion B...Non-entangled portion Patent applicant Teijin Ltd. Company Day 1, /+3 Ii

Claims (3)

[Claims] (1) At least a core yarn is a water-absorbing polyamide filament copolymerized with 3,6-dioxaoctamethylenediamine and having a thickness of 1.5 d/f to 4.5 d/f, and the other has a thickness of 1.5 d/f to 4.5 d/f. A composite yarn characterized in that polyamide filaments of 5 d/f or less are arranged at least in the regular system. (2) The composite yarn according to claim (1), wherein the constituent filaments are interlaced with each other. (3) The composite yarn according to claim (1), wherein the constituent filament yarns are subjected to a two-feed taslan process.