JPS60199936A - Spun yarn like hard twisted special processed yarn and its production - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] <Field to which the invention pertains> The present invention relates to a false twisted composite processed yarn having a core/sheath structure.
For more details, see spun yarn-like strong twist with design effects! This invention relates to specially processed yarn and its manufacturing method.

<Prior art> Conventionally, methods for manufacturing slub-like design yarn using a design twisting machine or a spinning machine have been known, but these are complicated in terms of equipment and are prone to strong twisting. In order to obtain this, it is necessary to add many twists, which is very disadvantageous in terms of productivity cost. In order to improve these points, it has been proposed to obtain a decorative yarn consisting of a slab part and a ground part using false twisting (Patent Publication No. 11850-31547, Japanese Utility Model Application No. 50-200576). .

These proposals are broadly divided into two, one of which is:
(This is related to the diversification of sprue shapes by controlling the slab part.) The other one is due to the difference in yarn form between the slab part and the ground part. The present invention relates to a manufacturing method thereof.

The latter feature is that depending on the number of twists in the remaining actual twist portion, it is possible to produce a fabric with a strong twist texture.

However, in the latter method, although the touch of the fabric has the crisp feel of a strong twist disease, at the same time, it has not been possible to obtain the fine grain form on the surface of the fabric that is sometimes required for a strong twist disease. Therefore, in order to obtain a fabric with a highly twisted grained appearance, it is necessary to add additional twisting, but even this is not enough to obtain a fully satisfactory form, and is extremely disadvantageous in terms of production. Therefore, it would be desirable to have a slub yarn that gives a fabric with a fine grain pattern with strong twist even without additional twisting, but since the slub yarn has a tightened structure, it has a texture that is accentuated. The crispy texture itself exhibits a strong crispy texture, which is far from the true crispy texture that is found in so-called spun-like or even silk yarns.

Purpose of the present invention The purpose of the present invention is to improve not only the thin grain shape but also the bulging, hard-twisted touch, (crisp feel), and snow-like feel that hard-twisted yarns cannot match. An object of the present invention is to provide a slub yarn that provides drapability and a method for producing the same.

In order to achieve the above object, the inventors of the present invention, as a result of intensive studies, noticed that Taslan ■ has a representative loop, the filaments are mixed and intertwined with each other in the core part 1, and the arrangement is a random structure, It has been found that when such a yarn is used as a core yarn in the h-edition composite plate twisting process, the purpose can be achieved at once.

Thus, according to the present invention, a thermoplastic fiber having a fine 74% loop in the axial direction of the single fibers and mixed with each other is used as a core yarn, and a sheath yarn made of thermoplastic fibers is multilayered against the core yarn. In the spun yarn lJ1 highly twisted specially processed yarn, which has a slab part formed by winding in a spiral shape, a sheath yarn, and a ground part formed by twisting together in a strongly twisted form in one direction, 0) core yarn But the loop @Q,l ~0. a all s
It is composed of an aggregate of single fibers having a loop count of 20 to SOO/-, ←) The cumulative thread length of the ground part accounts for 40 to 70% of the total thread length, and (c) The twist of the ground part A thermoplastic yarn consisting of a spun yarn-like highly twisted specially processed yarn characterized by a coefficient α, 75E of 0.6 or more and an aggregate of single fibers is guided to a jet turbulence generating nozzle, and the single fibers are are intertwined and a minute loop is formed in the axial direction of the single fiber, and then, when false twisting is performed, the sheath yarn in an excessively supplied state is heated to false twist the core yarn, using the silver yarn as the core yarn. In the manufacturing method of specially processed yarn, in which the core yarn is twisted together with the core yarn to form a slab part and a ground part, and then passed through a heat treatment area, and then led to false twisting and subjected to a false twisting process. Using an injection type turbulence generation nozzle that generates turbulence at an air pressure of 2.0 to 6.0% as the mouth and nozzle, c. The false twist coefficient α leads to a false twist heating range that satisfies the following formula: 0.75≦Machi≦0.95.2.At that time, the excess supply rate of the sheath yarn to the core yarn is set to 70 to 1.
A method for producing spun yarn-like highly twisted specially processed yarn, characterized by merging sheath yarn with core yarn in a heated region while maintaining the sheath yarn in a range of 30%.

is provided.

The present invention will be explained below with reference to the accompanying drawings. Figure 1 (0) is a side view of the specially processed yarn (hereinafter referred to as slub yarn) according to the present invention, and (b) is a side view of the silver yarn when it shrinks (grey glue is laxed). FIG. In the figure, reference numeral 1 denotes a loop yarn including minute loops 2 and a core portion 3 made of mixed and intertwined single fibers, which is arranged in a substantially straight line as a core yarn of a composite processed yarn. On the other hand, the sheath yarn is the core yarn (loop yarn)! A single-wound portion 5 (ground portion) and a multiple (usually triple or quintuple) wound portion 6 (effect portion) are alternately formed around the .

In the present invention, it has been found that in a slub yarn using the loop yarn as described above as the core yarn, no misalignment occurs between the core yarn and the sheath yarn, and an integral bonding anchor effect is produced.

As a result, when the gray material made of the yarn is relaxed and refined, the entire ground portion is untwisted and a clear and fine grain is generated.

Naturally, during relaxed scouring, the yarns shrink to varying degrees, but at that time, the single fibers in the core 3 of the loop yarn 1 are randomly mixed and intertwined, and their arrangement is disrupted. As a result of shrinkage occurring not only in the longitudinal direction of the yarn but also in the cross-sectional direction, a subtle swelling effect appears as shown in Fig. 1 ←). In addition, the loop 2 of the core yarn 1 itself imparts a spun-like touch to the entire slub yarn.

With the above in mind, the significance of the following requirements essential for achieving the purpose of the present invention will be described.

0) The core yarn is composed of an aggregate of single fibers having a loop diameter of 0.1 to 0.3 m and a loop number of 20 to SOO/m.

(b) The cumulative yarn length of the gland part is 40 to 70% of the total yarn length.
to occupy.

(c) The twist coefficient α1 of the ground portion is 0.6 or more.

Significance of requirement (a): The range of loop diameter and the number of loops affect the strong twist touch and grain form. If the diameter of the sheath yarn is less than 0.1 m or the number of loops is less than 20/rn, it will not be possible to form an integral bond with the sheath yarn, and therefore the system as a whole will not be untwisted, resulting in a poor texture. You will only get something unsatisfactory. On the other hand, if the loop diameter exceeds 0.3 wa or the number of loops exceeds 500/m, the interfacial voids between the core yarn and sheath yarn will increase dramatically, the yarn will become noticeably rough, and the fabric will deteriorate. Drapability is also reduced.

Significance of the requirement (b) (preferably 50 to 70%): Strongly twisted texture and touch are obtained by high actual twist of the sheath yarn wound around the ground portion.

Therefore, when the cumulative length of the ground portion exceeds 70%, the level of actual twisting decreases and this texture is lost. On the other hand, if the length is less than 40%, the grains on the fabric will occur in 8 concentrated locations, making it impossible to obtain grains with the desired uniform appearance.

Significance of requirement (c): As explained in item (b), in order to obtain a strong twist-like touch and grain due to strong twist, the number of actual twists, especially the number of actual twists (wraps) in the ground area, is at a high level. In this sense, α == 0.6 is a necessary condition for the lower limit.

On the other hand, Fig. 2 0), ←) shows a conventional slab yarn, in which the core yarn 1' is a normal flat yarn, that is, the constituent single fibers are arranged approximately parallel to each other, so the sheath yarn is Not only is there no integral bonding property with the core yarn, but also only the core yarn contracts along its longitudinal direction, so it is impossible to expect a texture, a swelling effect, or even a touch similar to that of a spun yarn.

Next, the method for manufacturing the slab yarn of the present invention will be explained with reference to FIG.

The thermoplastic yarn constituting the core yarn (11) is supplied to the supply roller (7) in an oversupply state relative to the take-up roller (8).
and a turbulent flow nozzle (
After receiving the compressed air turbulence treatment by the take-up roller (8)
). (Next, the filament) is supplied to the first supply roller a in the false-twisting area, false-twisted by the false-twisting device u3 located between it and the third delivery roller αB, and heat-treated by the heater a3. Ru.

On the other hand, the thermoplastic yarn IBI constituting the sheath yarn (2) is passed through the fulcrum guide α9 by the second supply roller I, which is in an oversupply state with respect to the first supply row 2, and is in a false twisted state. The core yarn is wound around the core yarn and wound around the winder αe, which forms a ground portion having a strong twist form and a slab portion having a multi-layer screw pattern.

In such a process, the following requirements are necessary to obtain the slub yarn of the present invention, and their significance will be described below.

0) Excess supply of core yarn to the jet turbulence generating nozzle in the range of 1 to 6%.

(b) As the nozzle, use an injection type turbulence generating nozzle that generates turbulent flow at an air pressure in the range of 2.0 to 6.0%.

(c) To lead to a false-twisting heating region where the false-twisting coefficient α satisfies the following equation.

0.75≦α, ≦0.95 ←) Excess supply rate of sheath yarn to core yarn is 70-130%
The sheath yarn is made to merge with the core yarn in the heated area while maintaining the temperature within the range of .

Significance of requirement (a): The excess supply rate is particularly related to the number of loops, and if it is less than 1%, it is difficult for the number of loops to reach the lower limit value of the present invention. On the other hand, if it exceeds 6%, the number of loops will be 50.
The number of loops exceeds 0/I11, and the loop diameter becomes too large, causing 7 cut and poor drapability.

Significance of the requirement of (CI): Pneumatic pressure is particularly related to the size of the loop; if it is less than 2.011F, it is difficult to stably create a loop with a diameter of 0.1111 or more; on the other hand, if it exceeds 6F, the loop diameter If the fabric becomes too loose, the drapability will deteriorate.

Significance of requirement (c): If α is less than 0.75, the desired number of twists (number of turns) cannot be obtained in the ground portion, and a strong twist tone cannot be obtained. on the other hand,
If it exceeds 0.96, not only will the false twisting property itself become unstable, but the number of twists will become excessive and the roughness and hardness of the yarn will become noticeable.

Significance of the requirement (2): If the excess supply rate exceeds 130%, the cumulative yarn length of the slab portion will increase, making it impossible to ensure the length of the ground portion necessary to obtain the grained shape. On the other hand, if it is less than 70%, the number of windings of the sheath yarn in the gland part does not reach the level of strong twist, and the touch of strong twist,
Grain shape cannot be obtained.

In the present invention, the yarn used as the core yarn and sheath yarn is polyamide or polyester.

Thermoplastic filament yarns such as acetate are preferred, but are not necessarily limited to 100% filament yarns as long as they have heat-set properties. Further, in view of the purpose of the present invention, more preferable results can be obtained when a yarn with strong shrinkage stress (for example, the yarn described in Japanese Patent Publication No. 56-8140) is used as the core yarn. On the other hand, the ratio of the thickness (d) of the core yarn to the sheath yarn is important, and it is usually appropriate to use the former to the latter in the range of 4:1 to 1:3.

On the other hand, as an injection type turbulence generating nozzle, in this field,
The well-known Taslan nozzle is suitable. Furthermore, as a false twisting device, spindle method, friction disk method, etc.
There are no particular restrictions.

Function/Effect> As already mentioned, the basic idea of the present invention is
In the production of slub yarns as typified by Publication No. 5147, Taslan yarn is used as the core yarn, and (1) by specifying the number of loops and the loop diameter, it is possible to create integrity (anchor effect) between it and the sheath yarn. Because it makes you feel
Even without additional twisting, an untwisting torque is generated in the slab yarn/overall during relaxing scouring, so a uniform and fine grain pattern can be obtained.

(11) When the slub yarn shrinks during relaxation scouring, the core of the Taslan yarn is mixed and intertwined without directionality, so the shrinkage causes swelling in the cross-sectional direction, eliminating the rough and hard feeling. You can get the crispy taste of silk 2 Iku.

0il) The loop of the core yarn adds a spun yarn-like touch in addition to the inside (11).

It produces actions and effects that have never been seen before.

In particular, regarding the internal integrity, the slub yarn of the present invention has zero
．． As a result of passing the silver thread through a tension applying device (such as an S condenser) capable of applying 3 f/de and observing the changes in the morphology of the silver thread before and after applying ironing, it was found that there was no effect of ironing due to the application of tension. I couldn't. On the other hand, when a specially processed yarn was made under the same conditions using a core yarn that does not have intertwining of single fibers or minute loops and was subjected to similar tests, it showed a completely different morphology and also caused yarn breakage.

In addition, the actual IAI @ 57-200! Publication i76 discloses the use of loop yarn as the sheath yarn, but in this case, the aim is to create a warm feeling by making as many loops as possible on the surface of the slub yarn. However, the functions and effects of the present invention described in (1) to (11) above are completely different from these.

Examples Two suitable filament yarns were selected from the following four types of filament yarns, and various slub yarns were manufactured by changing the processing conditions in the process shown in FIG. Each slub yarn is then woven using warp and weft yarns.

O Weaving conditions Warp 13.2 2 people (Bacterial load) Weft 22.4 (between cIL) Plain weave structure The obtained fabric was relaxed under the following conditions and then subjected to normal dyeing.

0 Relaxation conditions Rotary washer 120℃
×20 minutes O alkali weight loss rate 18% The results are listed in the following table. In the table, the fruit sapon rot surrounded by O indicates a comparative example, and the processing conditions surrounded by 0 indicate that it is outside the scope of the present invention.

The three items for textile evaluation are ◎, ○, ○~Δ, Δ~x, x Good← Based on a 5-level sensory evaluation.

As can be seen from the table, fabrics that deviate from the conditions of the present invention cannot simultaneously satisfy the three required properties as a fabric.

In general, when fabrics were made from the slab yarn according to the present invention without additional twisting, fabrics with appropriate fullness and crispness as well as extremely random and fine strongly twisted grained appearance were obtained. A slub yarn processed under the same conditions using a core yarn without micro loops had a crisp feel but lacked drapability, and a satisfactory grained appearance could not be obtained.

The number and diameter of the loops are measured using a microscope, and for the former, the inverted loops (Cournoud loops) are counted, and for the latter, the average value of the diameters of 10 loops from the largest among the loops, and Calculate the average value of the 10 smallest loop diameters and use +L to determine the loop diameter.

Figure 1 (a) (b) Figure 2 (a) (b) Figure 3 Procedural amendments dated July 1939, Mr. Commissioner of the Patent Office, 1. Special request for indication of the case! ;'/ -, rogql No. 2 Title of the invention 3 Relationship to the case of the person making the amendment Patent applicant 1-11 Minamihonmachi, Higashi-ku, Osaka (300) Teijin Ltd. Narupu Station $z1 Sur1' work, Kami 241 Size g / l f'J
1 k” 'missing n length and waiting person t>.

＞Yoshike Nagi kshioka soyaku toro, 94 each hak, bending
Uh, 1 child.

Claims (1)

[Scope of Claims] (1) Mixing of single fibers with each other - thermoplastic fibers having minute loops in the axial direction of the single fibers are used as a core yarn, and sheath yarns made of thermoplastic fibers are layered in multiple layers around the core yarn. In a spun yarn-like highly twisted specially processed yarn having a slab part formed by winding in a spiral pattern and a ground part formed by a sheath yarn and a core/yarn twisted together in a strongly twisted form in one direction, (4) the core yarn is It consists of an aggregate of single fibers with a loop diameter of 0.1~08a and a loop number of 2j-soo/corner, and the cumulative yarn length of the ground part is 40~70cm of the total yarn length. (c) A spun yarn-like highly twisted specially processed yarn characterized in that the twist coefficient a of the ground portion is 0.6 or more. (2) A thermoplastic yarn consisting of an aggregate of single fibers is introduced into a jet turbulence generating nozzle to intertwine the single fibers and form a fine 1Jz loop in the axial direction of the single fibers, and then undergoes false twisting. When performing this process, the silver thread is used as the core thread, and the excess sheath thread is guided into the false twist heating area of the core thread and twisted together with the core thread to form a dump part and a ground part, and then the heat treatment area is In the method for producing specially processed yarn in which the yarn is then led to a false twisting device and subjected to a false twisting process, (0) the core yarn is over-supplied in the range of 1 to 6% to a jet turbulence generating nozzle, (b) as a nozzle, Using an injection type turbulence generating nozzle that generates turbulent flow in the air pressure range of 2.0 to 6.0%, f→ false twist coefficient a! leads to a false twisting heating range that satisfies the following formula: 0.75≦α, ≦0.95 ←) At that time, the excess supply rate of the sheath yarn to the core yarn is set to 70 to 1
A method for producing a spun yarn-like high-twist specially processed yarn, characterized by merging the sheath yarn with the core yarn in a heated region while maintaining the sheath yarn within a range of 30%.