JPS6359437A - Production of bulky feather processed 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 (Industrial Field of Application) The present invention is characterized in that a large number of fluffs of different thicknesses and shapes are formed on the yarn surface, giving the fabric a spun-like appearance and texture. The present invention relates to a method for producing a bulky fluffed yarn that can provide excellent pilling prevention performance.

(Prior Art) Conventionally, a large number of loops are formed in a yarn by fluid jet processing. The so-called Taslan processing method is known (for example, Japanese Patent Publication No. 34-8969, Japanese Patent Publication No. 44-1322).
(See Publication No. 5). However, in order to increase the bulkiness of the processed yarn obtained by this method, it is necessary to form a large number of loops on the yarn surface.

For this reason, there is a problem in that the loops get caught in each other, resulting in poor unwinding of the yarn, resulting in poor weaving and weaving performance. You can also rub the yarn with a whetstone or blade.

A method of forming broken fluff on the yarn surface is also known.

According to this method, there is no problem of poor unwinding of the yarn as mentioned above, but the thickness and shape of the fuzz formed on the surface of the yarn are too uniform, so when it is made into a fabric, it has problems with bulkiness, tension, and waist. There is a problem in that pilling is likely to occur because it has chips and fuzz formed by abrasion.

(Problems to be Solved by the Invention) The present invention addresses the above-mentioned problems and attempts to solve them. To provide a method for producing a bulky fluffed yarn, which can produce a fabric that has a spun-like appearance and feel like natural fibers, especially wool, and has excellent pilling prevention performance.

(Means for Solving the Problems) In other words, in the present invention, a hollow cross-section filament and a non-hollow cross-section filament with a hollow ratio of 40 to 90% are supplied to the same fluid jet nozzle, and a fluid jet treatment is applied to the hollow cross-section filament. The gist of the present invention is to provide a method for producing a bulky fluffed yarn, which is characterized by intermittently dividing cross-sectional filaments in the longitudinal direction to break some of them, and intertwining the filaments with each other.

The present invention will be explained in detail below.

In the present invention, a hollow cross-section filament (hereinafter referred to as a filament) is used.

Hollow filament) and non-hollow cross-section filament (
The non-hollow filaments (hereinafter referred to as non-hollow filaments) are supplied to the same fluid injection nozzle, and the hollow filaments are intermittently segmented in the longitudinal direction to break some of them, and the hollow filaments and non-hollow filaments are intertwined.

Here, the hollow filament has a hollow ratio of 40 to 90.
It is necessary to use a hollow filament with a high hollowness ratio of %. If the hollowness ratio of the hollow filament is less than 40%, fibrillation will not occur. On the other hand, if the hollowness ratio exceeds 90%, the strength of the hollow filament will decrease significantly, and
This is not preferable because it is difficult to produce hollow fibers and the operability during production of the bulky fluffed yarn of the present invention is reduced.

In the present invention, °ζ intermittently subdivides the hollow filament in its longitudinal direction, that is, fibrillates it, and breaks a portion of it to form broken fuzz on the yarn surface by a fluid jet treatment. At the same time, the filaments constituting the yarn are intertwined with each other. The entanglement of the filaments prevents the broken fluff from falling off,
The shape robustness of the yarn is improved.

In addition, in the present invention, a non-hollow filament is used together with a hollow filament because the non-hollow filament intertwines with the hollow filament to strengthen the yarn and prevent yarn breakage during the fluid jetting process. This is to prevent the strength of the yarn from decreasing. Therefore, it is preferable that the solid filament is not damaged by the fluid jetting process, but there is no problem if the solid filament is damaged to some extent.

Furthermore, in the present invention, loop fluff or slack may be formed in addition to the above-mentioned broken fluff.

When loop fluff or the like is formed, the voids between the filaments can be increased and the bulkiness can be further improved.

The higher the content of hollow filaments, the more effectively fibrillation can be performed, and the lighter the feeling and bulkiness can be improved, so it is preferable to have the content as high as possible, but take into account the strength of the yarn, etc. Then, it is preferable that 20 to 80% of the total number of filaments in the supply system be included.

In the method of the present invention, when the yarn containing the hollow filaments is subjected to fluid injection treatment using a fluid injection nozzle having an entanglement forming ability, the hollow filaments are intermittently fibrillated in the longitudinal direction thereof.

Fibrils with different thicknesses and cross-sectional shapes are formed, but fibrils that are relatively thin and weak are broken preferentially, forming broken fluff.

In the method of the present invention, in order to effectively perform the above-mentioned fibrillation, it is necessary to feed the hollow filament and the non-hollow filament to the same fluid injection nozzle, at least the hollow filament in an overfeed state, and form the yarn at the outlet of the fluid injection nozzle. It is preferable to bend the thread by approximately 90 degrees with respect to the fluid jetting direction to apply a high-speed jet to the side surface of the thread.

The present invention will be explained below based on illustrated examples.

FIG. 1 is a process schematic diagram showing the manufacturing process of the method of the present invention, in which yarn Y is made of non-hollow filaments.

is supplied to the fluid jet nozzle 3 via the feed roller 1, while the yarn Y2 made of hollow filaments passes through the feed roller 2 to the yarn Y1 made of non-hollow filaments.
The fluid is supplied to the fluid injection nozzle 3 at a higher overfeed rate, is subjected to fluid injection processing by injecting compressed fluid at the fluid injection nozzle 3, is bent approximately 90 degrees at the outlet of the fluid injection nozzle 3, and is rolled up via the delivery roller 4. It is rolled up into a package 6 by a take-up roller 5.

In addition, as long as the yarn includes hollow filaments and non-hollow filaments in the above, the number of supply systems may be one.

The conditions for the fluid jetting process are appropriately selected taking into consideration the hollowness ratio of the hollow filament, the form of the yarn to be obtained, etc. 2 For example, the following conditions are used.

It is desirable that the injection pressure of the compressed fluid be relatively high, and preferably 5 kg/cj to 9 kg/ad. When the injection pressure of the compressed fluid is less than 5 kg/CIA,
Fibrillation and rupture of the hollow filament may become insufficient, and if the weight exceeds 9 kg/crA,
This is not preferred since solid filaments may be damaged. In addition, the yarn overfeed rate is 3% to 1
00% is preferably adopted.

20% especially when forming loops or slack on the yarn surface
~80% is preferably employed.

In the method of the present invention, any fluid injection nozzle can be used as long as it has an interlacing effect, such as an interlaced nozzle or a taslan nozzle.

FIG. 2 is a schematic diagram showing an example of the cross-sectional shape of a yarn having a fibrillated portion of hollow filaments. There are fibrillated filaments C3 to C6 and the like.

In the method of the present invention, portions in which filaments with various cross-sectional shapes as shown in FIG.
A large number of broken fluffs with different thicknesses and shapes are formed on the yarn surface. As described above, the relatively thin and weak fibrils are preferentially broken in this broken fluff and are formed in the outer layer of the yarn, so it is highly flexible and has good anti-pilling performance. In addition, the portion other than where the fibrils are formed retains its original hollow cross-sectional shape.

Next, the shape of the cross section of the hollow filament used in the present invention may be any shape such as a circular cross section or an irregular cross section, and the relationship between the shape of the cross section of the hollow filament and the shape of the hollow part is as follows. They may be either similar or dissimilar. Also.

There is no limitation on the number of hollow parts of the hollow filament either. Furthermore, hollow filaments of the same shape may be used, or hollow filaments of different shapes may be used in combination. Moreover, the cross-sectional shape of the non-hollow filament may be any shape such as a circular cross-section or an irregular cross-section.

4 and 5 are cross-sectional views showing an example of a hollow filament used in the method of the present invention, and in FIG. The one shown in Fig. 5 is of a non-similar shape.

These hollow filaments can be spun by using a spinneret in which the slit width, length, and shape of the spinning hole are appropriately changed. For example, the hollow filament 71- shown in FIG. 2a with a circular cross section can be obtained by melt spinning a polymer through a spinneret having a spinning hole of the shape shown in FIG.

FIG. 6 is a schematic side view showing an example of a bulky fluffed yarn obtained by the method of the present invention, and FIG. 7 is a schematic diagram for explaining the form of hollow filaments constituting the bulky fluffed yarn shown in FIG. be. In FIG. 6, the bulky fluffed yarn includes a loop 8 consisting of a hollow filament 7. Fibrils 9 formed by partially subdividing hollow filaments 7
and a partially broken piece of fluff 10. A large number of loops 12 and the like made of solid filaments 11 are formed.

Hollow filaments, non-hollow filaments, and hollow filaments and non-hollow filaments are intricately intertwined. Such intertwining of the filaments prevents the broken fluff from falling off and improves the stability of the loop shape.

Here, the hollow ratio refers to the ratio of the area of the hollow part in the cross section of the hollow filament to the total area of the cross section,
Photograph or project the cross section of the thread.

Area Measuring Device 1 Using, for example, a digitizer manufactured by Sun Engineering Co., Ltd., measure the area S of the hollow filament.
0 and the area S of the hollow portion were measured and calculated using the linear equation.

Hollowness ratio = (S + / S o) × 100. The content of hollow filaments is expressed as a percentage of the number of hollow filaments in the entire supply system.

The filament in the present invention includes polyester,
Examples include filaments of synthetic fibers such as polyamide, filaments of semi-synthetic fibers such as acetate, and filaments of recycled fibers such as rayon. Since the fibrils are intermittently divided in the longitudinal direction to form fibrils and some of them are broken, broken fluff is formed on the surface of the yarn, and this broken fluff creates a soft feel and a spun-like appearance. Gives texture. Furthermore, the broken fluff is formed by preferentially breaking fibrils that are relatively thin and weak, so that a yarn having excellent pilling prevention performance can be obtained. In addition, since the hollow filament is intermittently subdivided, there are parts where hollow parts remain without being subdivided, which increases the spatial degree of the processed yarn and gives it excellent bulk. It provides warmth and a lightweight feel.

As described above, according to the present invention, it is possible to impart complex morphological changes in the longitudinal direction, and this is thought to have a yarn-like effect similar to natural fibers, particularly wool, and impart a spun tone.

Moreover, since the non-hollow filaments are intertwined with the hollow filaments, the broken fluff is prevented from falling off, and the strength of the yarn is maintained by the non-hollow filaments.
Also, a tension of 1M is given. Furthermore, since a non-hollow filament is used.

Even if a hollow filament with a high hollowness ratio is used as described above, thread breakage and the like are less likely to occur during the fluid injection treatment, and processed thread can be obtained with good operability.

(Examples) Next, two examples of the present invention will be specifically described. In the following examples, the hollow ratio is determined at five arbitrary cross-section points.
This is the average value measured by the above method.

Example 1 According to the process shown in FIG. 1, yarn Y1 was fed from the feed roller 1 at an overfeed rate of 10%, yarn Y2 was fed from the feed roller 2 at an overfeed rate of 40%, and the same fluid injection nozzle 3 Nozzle described in Japanese Patent No. 1673) and processed using the yarn combinations shown in Table 1 at a compressed air pressure of 8.5 kg/(J!).

Supply systems A, B, and C are all made of polyethylene terephthalate-based copolyester fibers made by copolymerizing ethylene terephthalate with 3 mol% of 5-sodium sulfoisophthalic acid components, and A and B have circular cross sections as shown in Figure 2 a. Hollow filament (A: hollow ratio 65%, B: hollow ratio 30
%), a 75d/24f multifilament yarn composed of non-hollow filaments with a circular cross section was used.

The obtained processed yarn was woven into a 2/2 twill with a warp density of 100 threads/2.54 cm and a weft density of 90 threads/2.54 C11, and then subjected to a conventional dyeing process.

The results obtained are shown in Table 1.

Test Storm 1 was based on the method of the present invention.

In the obtained processed yarn, the hollow filaments were partially fibrillated, and a large number of broken fluffs, in which some of the fibrils were broken, were formed on the yarn surface. In addition, loops and slack were also formed on the yarn surface. Fabrics using this processed yarn have a soft feel, excellent heat retention, and a lightweight feel due to the synergistic effect of the cut fluff, loops, etc., and the hollow cross section where the hollow filaments remain without being fibrillated. It was something that I had. Moreover, when this fabric was evaluated for anti-pilling performance using the J15-L-1076 and ICI methods, it was grade 5, indicating that this fabric had excellent pilling properties despite having a large number of breakage fuzz. It had preventive performance.

Test size 2, which did not contain non-hollow filaments, had a small amount of loops formed and was also insufficient in terms of entanglement.

In both Test Case 3, which used yarn made of hollow filaments with a low hollowness ratio, and Test Case 5, which did not contain hollow filaments, almost no breakage was formed, and therefore the fabrics made of these yarns lacked a soft feel. Met. In particular, in the case of test floor 5, the lightness was poor. Furthermore, in test 11h4, there were many thread breakages, etc., and processing was difficult.

Example 2 A cationic dye-dyeable polyester multifilament yarn 75d/24f consisting of hollow filaments with a circular cross section and a hollowness ratio of 65% as shown in FIG.

Polyethylene terephthalate multifilament yarns 75d/48f made of non-hollow filaments with a triangular cross section are aligned, and the feed roller 1 (
The feed roller 2 is not used) to the fluid injection nozzle 3 as in Example 1 at an overfeed rate of 10%,
Compressed air pressure 6kg/an! Fluid jet processing was performed to produce bulky fluffed yarn.

During the fluid injection process, there was no yarn breakage and the operability was good.

In the obtained processed yarn, the hollow filaments were intermittently fibrillated, and numerous loop fuzz, slack, and broken fuzz were formed on the yarn surface. In addition, hollow filaments, non-hollow filaments, and hollow filaments and non-hollow filaments were intertwined, and the broken fluff was difficult to fall off.

Using this processed yarn, the warp density is 100 pieces/2.54co+
.

Weaving 2/2 twill with a weft density of 90/2.54am.

When this was subjected to a conventional dyeing process, a fabric was obtained that was bulky, had a soft feel, had elasticity, and had a warm feel.

When this woven fabric was evaluated for anti-pilling performance in the same manner as in Example 1, it was found to be 5i, despite the fact that this woven fabric had many broken fluffs.

It had excellent ring prevention performance.

Example 3 According to the process shown in FIG.
Using polyethylene terephthalate multifilament yarn 150d/36f consisting of hollow filaments with a hollow ratio of 45% in the triangular cross section shown in FIG. Overfeed rate 30% from feed roller 2
was supplied to the same fluid injection nozzle 3 as in Example 1, and fluid injection processing was performed using a compressed air pressure cuff kg/d to produce a bulky fluffed yarn with yarn Y as the core yarn and yarn Y2 as the sheath yarn. did.

During the fluid injection process, there was no yarn breakage and the operability was good.

In the obtained processed yarn, the filaments are intertwined with each other and the hollow filaments are intermittently fibrillated.

Loop fuzz and slack fuzz were formed on the yarn surface.

This processed yarn was woven into a plain weave with a warp density of 62 threads/2.54 cm and a weft density of 50 threads/2.54 cm, and when this was dyed in the usual way, it was bulky and had a soft feel. It was a woven fabric with a waist and a texture and appearance similar to worsted wool. When this fabric was evaluated for pilling prevention performance in the same manner as in Example 1, it was grade 5.
Although the fabric had a large amount of fuzz, it had excellent pilling prevention performance.

(Effect of the invention) The method of the present invention has the above configuration.

It has a natural fiber-like texture and appearance, especially wool-like spun-like texture, with excellent bulk, tension, and elasticity.

It is possible to obtain a bulky fluffed yarn that can be made into a fabric with excellent soft feel and anti-pilling performance.

Furthermore, it is possible to prevent the broken fluff from falling off, and to obtain a processed yarn in which the tenacity of the yarn is less reduced. In addition, there are fewer yarn breakages during the fluid injection process, and processed yarn can be obtained with good operability.

Note that if loop fuzz is formed as necessary, a synergistic effect with the broken fuzz can give the wi knitted fabric a superior soft feel, tension, and firm texture.

[Brief explanation of drawings]

FIG. 1 is a process schematic diagram showing an example of the method of the present invention. FIG. 2 is a schematic diagram showing a cross section of a portion where fibrils of yarn are formed according to the method of the present invention, FIG. 3 is a plan view showing an example of a spinneret for spinning the hollow filament of FIG. 2a, 4 and 5 are cross-sectional views showing an example of a hollow filament used in the method of the present invention, FIG. 6 is a schematic side view showing an example of a bulky fluffed yarn obtained by the method of the present invention, and FIG. 7 is a schematic diagram for explaining the form of hollow filaments constituting the bulky fluffed yarn of FIG. 6. FIG.

Claims (2)

[Claims] (1) A hollow cross-section filament and a non-hollow cross-section filament with a hollowness ratio of 40 to 90% are supplied to the same fluid jet nozzle to perform a fluid jet treatment, and the hollow cross-section filament is intermittently segmented in its longitudinal direction. A method for producing a bulky fluffed yarn, which comprises breaking a portion of the filament and intertwining the filaments with each other. (2) The manufacturing method according to claim 1, wherein the content of the hollow cross-section filament is 20 to 80%.