JPS6215324A - Polyamide filament yarn having improved luster and refreshing feeling and twisted fancy yarn using said yarn - Google Patents

Abstract

PURPOSE:The titled yarn, having modified cross section of high modification degree and high filament fineness and titanium oxide content and boil-off shrinkage satisfying respective specific conditions and capable of giving fancy twisted yarns, suitable for circular knitted sports materials, etc., and having improved luster and refreshing feeling. CONSTITUTION:Polyamide filament yarns are spun to give tri- - multilobal filament yarns having <=0.03% titanium oxide content, >=6 denier filament fineness and >=3 cross section modification degree, which are then adjusted to <=5% boil-off shrinkage of the filament yarns, preferably by a method for heating the filament yarns at 175-190 deg.C at 4-15% relaxing ratio and afford the aimed filament yarns. The resultant filament yarns are twisted around a core yarn consisting of spun yarns to give the aimed fancy twisted yarns.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a polyamide filament yarn with excellent gloss and a cool feeling, and a designed twisted yarn using the yarn.

More specifically, the present invention relates to a polyamide filament yarn that can be optimally used as a clothing material for spring/summer horizontal knit sweaters, circular knit suits, etc., and a designed twisted yarn using the yarn.

(Prior Art) Designed twisted yarn, which is made by covering spun yarn with rayon filament yarn, has been known as one of the materials for horizontal knitted sweaters and circular knitted suits for spring and summer.

This design twisted yarn has a structure in which rayon thread covers the spun yarn as a decorative thread, so in addition to the soft texture of the spun yarn, the high gloss and dry-touch coolness of rayon make it suitable for the design. When the twisted yarn or the designed twisted yarn is made into a knitted fabric, it exhibits a unique luster and texture, and brings about a unique composite effect.

Here, in general, such designed twisted yarn uses prite rayon as the rayon yarn, and furthermore, the unique irregular cross-sectional shape of rayon provides strong luster, and the high Young's modulus and irregular cross-sectional shape of rayon. This provides a dry-touch and refreshing feel, and adds desired properties such as luster, dry touch, and coolness that cannot be obtained with spun yarn alone, while essentially retaining the characteristics of spun yarn. It is something that is forcing us.

(Problems to be Solved by the Invention) The above-mentioned designed twisted yarn made of covered rayon yarn has the characteristics of being excellent in gloss and coolness, but on the other hand,
On the other hand, there were problems in terms of dyeability (dye fastness) and fiber strength. Regarding dyeability, rayon threads generally have poor color fastness, so they always have the problem of color fading.

Furthermore, in terms of fiber strength, rayon threads have very real problems due to lack of durability due to the low strength of rayon threads, such as elbows coming off when sewn products are made.

On the other hand, as a material for high-end applications, there is a desire in the industry for the creation of a designed twisted yarn with high gloss and a refreshing feel by intertwisting it with wool.

However, when trying to obtain intertwisted yarn of rayon filament and wool, there is a basic problem in terms of dyeability.
Such a design thread has not yet been realized. That is,
The dyeing methods for rayon yarn and wool are different: direct dyes are mainly used for rayon, acid dyes are mainly used for wool, and chrome dyes are used when dyeing fastness is particularly important. Therefore, in the case of rayon and wool intertwisted yarns, it is necessary to dye them in two baths. However, the reality is that it is difficult to develop a design-twisted yarn of rayon and wool intertwisted from a cost standpoint.

Incidentally, common dyes for rayon and wool include vat and mordant, and bath dyeing is also considered as a possibility, but there are differences in dyeing properties (dye adsorption amount, adsorption speed, dyeing solution dyeing solution, etc.). Synchrony deteriorates due to
Practically speaking, one-bath dyeing is difficult to achieve.

In view of the above-mentioned points, the present invention aims to improve the drawbacks of the conventional design twisted yarn using rayon thread as a decorative thread. Instead, synthetic fiber threads are used to maintain the luster and cool feel of rayon decorative threads, while also achieving greater luster and coolness than rayon decorative threads.

Excellent in terms of dyeability, fiber strength, etc. The purpose is to provide a novel yarn for decorative lights and a designed twisted yarn using the yarn.

In other words, the object of the present invention is to provide a synthetic fiber filament yarn for decorative twisted yarns that can realize a designed twisted yarn that has excellent dyeability, excellent gloss, and has an excellent dry-touch and refreshing feel effect. The purpose is to provide a designed twisted yarn using this yarn.

(Means for Solving the Problems) The present invention that achieves the above-mentioned advantages consists of the following configuration.

That is, the synthetic fiber yarn for decorative lights of the present invention is a trilobal or more multilobal filament yarn made of polyamide fiber, and has a titanium oxide content of 0°05 or less.

It is a polyamide filament yarn with excellent gloss and cool feeling, characterized by the following: single fiber fineness (denier)≧6, cross-sectional deformation≧3.0, and boiling water shrinkage (chi)≦5.

In addition, the designed twisted yarn of the present invention has a spun yarn as a core yarn.
The core yarn is a trilobal or more multilobal filament yarn with a titanium oxide content of 0.03% or less, a single fiber fineness of 6 denier or more, a cross-sectional deformation of 3.0 or more, and a submerged shrinkage rate of 5. It is a designed twisted yarn with excellent luster and cool feeling, which is made by twisting polyamide filament yarn with a diameter of less than 100 mm.

Preferred embodiments of the present invention are as follows.

They will turn off in sequence according to the explanation below.

(effect) The present invention will be explained in more detail below.

The decorative synthetic fiber yarn of the present invention is made of multifilament yarn of polyamide fiber.

Here, polyamide filament yarns or fabrics made of polyamide filament yarns are generally used.

It has a unique slimy texture, which is far from the cool texture required for spring/summer materials. This slimy texture can be eliminated by roughening or irregularly shaping the fiber surface.

In the present invention, in particular, by highly deforming the fiber cross section, and by shaping it into a special shape, a unique dry-touch and refreshing texture can be obtained, which is different from the slimy texture of conventional polyamide yarns. This is something that I was able to improve upon. The fiber cross section of the polyamide filament yarn in the present invention needs to be multilobal with three or more lobes, as shown in the model examples in Figures 1A and B, and the degree of cross-sectional deformation is 3.0 or more. It is necessary to do so.

Here, the degree of cross-sectional deformation is (circumscribed circle radius)/of the fiber cross-section
(radius of inscribed circle).

In addition, in order to obtain a cool feeling for spring/summer materials, appropriate tension is required, but if we consider the tension of the thread as bending resistance, the bending resistance F is 9.

It is expressed as r,,mx・ε　, where.

E: Young's modulus I; moment of inertia ε; Deflection, therefore.

Bending resistance p ac g, also.

E I g f a d2 Therefore, 9 bending resistance F'<Ic 2 -d becomes. here.

f; number of filaments d: Single yarn fineness.

According to the findings of the present inventors, in order to obtain a suitable fabric for spring/summer materials, the fineness of the single fibers should be set to 6 denier or more. Bye. For example, in the case of multifilament yarn with a total fineness of 75 denier.

The number of filaments may be at least 11 to 12.

When the single fiber fineness is less than 6 denier, it is difficult to obtain the desired tension and dry touch in a well-balanced manner as a designed twisted yarn.

In other words, if you are trying to create a high gloss or dry touch texture as a decorative yarn by using a yarn with a cross-sectional deformation degree of less than 3.0 and/or a single fiber fineness of less than 6 denier as a decorative yarn, it is necessary to The ratio of the decorative thread to the spun thread must be large, and in that case, the characteristics of the spun thread in the design twisting thread are largely lost, which is completely undesirable.

In connection with this point, 9 According to the present invention, at a weight ratio of 1 (core spun yarn)/[covering yarn) - (55 to 70)
/(45 to 30), a designed twisted yarn with good gloss and a cool feeling can be obtained, and this can be said to be a designed twisted yarn that is practically useful as a material for various clothing.

In addition, in the polyamide filament yarn of the present invention, in order to obtain good gloss, the titanium oxide content of the glare is 0.
．． 03 It is necessary to make it under the weight board.

Next, in the present invention, it is necessary that the polyamide filament yarn has a submerged shrinkage rate of 5 or less. When the submersion shrinkage rate is within this range, the dimensional stability of the fabric during dyeing is good, and a uniform product with extremely stable storage can be obtained. If the diving contraction rate is larger than 5 factors, the above effect will not be achieved.
, L-1074.

For example, a wool spun yarn is used as the core yarn, a regular polyamide filament yarn with a submerged shrinkage rate of 10 inches or more is used as the decorative yarn, and the wool spun yarn is covered with the polyamide filament yarn to create a designed twisted yarn. Yo; After editing etc.
When dyeing, the shrinkage of polyamide yarn is much larger than that of wool spun yarn, so the heat shrinkage of the sheath yarn is more significant than that of the core yarn, and the wool spun yarn of the core yarn and the polyamide filament yarn of the sheath yarn are Causes sheath reversal phenomenon.

Due to this core-sheath inversion phenomenon, only a hard texture that is unpleasant to the touch and completely different from the desired texture can be obtained. According to the knowledge of the present inventors, such problems can be almost completely prevented by controlling the flood shrinkage rate of the polyamide filament yarn to 5 degrees or less.

According to the findings of the present inventors, in order to reduce the flood shrinkage rate to 5 inches or less, it is preferable to perform intense heat treatment on the polyamide filament yarn prior to manufacturing the designed twisted yarn. That is, it is preferable that the polyamide filament yarn is first subjected to heat treatment in a relaxed state.

During such treatment, the relaxation rate ranges from 4 to 15%,
The temperature is preferably within the range of 175°C to 190°C.

If the relaxation rate is less than 4%, it is generally difficult to obtain a flood shrinkage rate of 5% or less; if the heating temperature is less than 175°C, the relaxation rate will not be sufficient, which is undesirable; and if it exceeds 190°C, the yarn will deteriorate. It is undesirable. The polyamide yarn used is preferably an undrawn yarn, a highly oriented undrawn yarn called POY. Since the heat treatment described above requires intense heat treatment, the heater is preferably a contact type heating element, specifically a hot plate, a hot roller, or the like.

The polyamide filament yarn as described above is used as a decorative yarn to cover the spun yarn of the core yarn.

For the covering, a general covering machine or the like may be used.

In the present invention, as is clear from the above description, a combination in which the spun yarn contains wool is most effective as a design twisted yarn, but the spun yarn is not limited to one containing wool.

Of course, other fibers such as those made of acrylic fibers and those made of cotton fiber may also be used.

Also, care must be taken as it tends to deteriorate the slimy feel of polyamide fibers.

(Example) A polyamide 7-strand lament yarn 75D-8f with a trilobal lobal highly deformed cross section (deformation degree -3.0) spun at a spinning speed of 3000 m/min was used using a hot plate with a heater length of 1.5 m. It was heated to 180° C. and heat treated at a relaxation rate of 10 degrees. The amount of titanium oxide in this thread is 0.03%
It is. The polyamide filament yarn thus obtained had a flood shrinkage rate of 4%. The filament yarn was used as a sheath yarn, wool spun yarn 1'72 was used as a core yarn, and the core yarn was single-covered with the sheath yarn at a twist number of 500 T/m. We obtained a *wish-twisted yarn with a model structure similar to the above. In the figure, 1 is polyamide filament yarn, 2
is a spun yarn. The designed twisted yarns obtained in this way have a unique elegant luster and a dry and refreshing feel, which is preferable to conventional yarns, which do not have any problems in terms of dyeability or fiber strength. It was recognized as being excellent in this respect.

(Effects of the Invention) The polyamide filament yarn of the present invention has a highly deformed irregular cross section as described above, and has a large single yarn fineness, so compared to conventional polyamide filaments, the polyamide filament yarn has higher gloss and
All of them can exhibit excellent properties in terms of texture.

In the present invention, the fiber cross section of the decorative yarn has a highly deformed irregular cross section and the single fiber fineness is large, so it can give a unique luster and cool feeling, and also has good tension due to increased splitting properties. At the same time, it is possible to provide a good design twisting yarn.

Therefore, there is no need to excessively increase the proportion of decorative thread components in order to achieve the desired luster and coolness.
The characteristics of the core spun yarn can also be brought out well.

According to studies by the present inventors, it is easy to make the gloss superior to that of rayon.

In addition, since it is a polyamide fiber, it has better dye fastness than conventional rayon filament.

There is no concern that the color will fade when it is commercialized. Regarding the dyeing process of cool twisted twisted yarn, it is possible to dye it in one bath using acid dye, which greatly reduces the cost of dyeing compared to two bath dyeing in the case of mixed twisted rayon and wool. I can do it. In terms of strength, it has higher strength than conventional rayon filaments, so when it is used as a designed twisted yarn, it has a great reinforcing effect on the material to which it is twisted, making it possible to obtain a durable designed twisted yarn.

Furthermore, the polyamide filament yarn of the present invention appears to have better dye absorbency during dyeing than conventional polyamide filament yarns, and this is considered to be a secondary effect of the relaxing heat treatment.

[Brief explanation of the drawing]

FIGS. 1A and 1B are model diagrams showing examples of fiber cross-sectional shapes of polyamide filament yarns in the present invention.
Figure A shows a three-leaf loval yarn, and Figure 1B shows a four-leaf loval yarn. FIG. 2 is a side view showing a model of the designed twisted yarn obtained in the example. 1: Polyamide filament thread (decorative thread) 2 Spun thread (core thread)

Claims (4)

[Claims] (1) Trilobal or more multilobal filament yarn made of polyamide fiber, with a titanium oxide content of 0.
03% or less, single fiber fineness (denier)≧6, cross-sectional deformation≧3.0, and boiling water shrinkage (%)≦5. (2) A spun yarn is used as a core yarn, and the core yarn is a multilobal filament yarn of trilobal or more, with a titanium oxide content of 0.03% or less, a single fiber fineness of 6 denier or more, and a degree of cross-sectional deformation of 3 A designed twisted yarn with excellent gloss and a cool feeling, characterized by being made by twisting polyamide filament yarns having a boiling water shrinkage rate of .0 or more and a boiling water shrinkage rate of 5% or less. (3) A designed twisted yarn with excellent luster and coolness according to claim (2), characterized in that the spun yarn contains wool. (4) The designed twisted yarn with excellent gloss and cool feeling as set forth in claim (2), characterized in that the spun yarn contains acrylic fiber.