JPH10310946A - Production of multilayer composite air-jet textured yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing the subject textured yarn capable of imparting a fabric with spun-like fluffy feel and puffiness and representing multicolor grain-toned effect. SOLUTION: A cation-dyeable highly oriented polyester undrawn yarn A and a polyamide drawn yarn B are arranged parallel with each other and subjected to false twist crimping into a composite crimped yarn D with a yarn length difference of >=5%. Subsequently, the composite crimped yarn D and a polyester-based potentially crimping composite filament yarn C are subjected to air jet processing simultaneously; at this time, the feed of the yarn D is set at a level >=5% greater than that of the filament yarn C so as to afford >=100/m of loop fluffs mainly of the yarn D on the yarn surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a multi-layer composite air jet yarn having a span-like fluffiness and swelling.

[0002]

2. Description of the Related Art Numerous methods have been proposed for producing bulky yarns having a spun appearance and feel using synthetic fibers. In particular, emphasis has been placed on how to express the bulge (bulkyness), which is a characteristic of worsted yarn, with synthetic fibers, and various methods have been tried.

For example, Japanese Patent Application Laid-Open No. 2-99632 proposes a method for producing a polyester three-layer structured yarn.
In this method, a plurality of yarns having different elongations are fluidly entangled and then subjected to false twisting to impart a yarn length difference according to a difference in elongation, and the yarn has a three-layer structure of an inner layer, a middle layer, and an outer layer. It is a form. However, in this method, since the filament is constrained at the entanglement point, a sufficient yarn length difference cannot be imparted to the obtained three-layer structured yarn, and there is a disadvantage that the feeling of swelling tends to be insufficient. If the fluid entanglement is weakened to compensate for this drawback, yarn length differences can be provided, but on the other hand, misalignment between the inner and outer layer yarns tends to occur due to the yarn length differences, resulting in poor form robustness. Become.

[0004] As described above, the multilayer structure yarn obtained by the simultaneous false twisting method simply utilizing the difference in elongation does not have a sufficient difference in yarn length and lacks a swelling feeling, and further has a span-like loop fluffiness. It cannot be done.

[0005] Other methods of imparting swelling include a method of imparting swelling by utilizing a difference in shrinkage due to the properties of the yarn.
Alternatively, there is a method of producing a core / sheath type bulky yarn by effectively utilizing the yarn length difference by a fluid disturbance treatment. The former is to impart a swelling due to a difference in shrinkage by a heat treatment after forming the fabric, and it is difficult to express an effective swelling due to the restraint of the fabric structure. In addition, the latter method is effective in terms of both appearance and feel because it can provide a span-like feel due to the loop fluff on the yarn surface and can impart bulkiness peculiar to Taslan processing. In addition, there is a drawback that the unwinding property from the package and the knitting and weaving properties are apt to deteriorate due to the entanglement of the loop and the sag.

[0006] As a method for solving the drawbacks of the Taslan processing, for example, Japanese Patent Application Laid-Open No. 60-94636 discloses a core / sheath type Taslan processed yarn in which yarns having different heat shrinkages are used and loop fuzz is suppressed. A method has been proposed in which, after a yarn is formed into a fabric using the yarn, a difference in heat shrinkage is developed to generate loop fluff on the surface of the fabric to give a fluff feeling and a swelling feeling. In this method, the oversupply rate of the core yarn and the sheath yarn is set as low as possible in order to suppress the generation of loop fluff during the fluid disturbance processing. Therefore, complicated bending blending unique to Taslan processing is restricted, and the constituent filaments are close to a parallel state and have a tight yarn form with few voids.

[0007] As described above, in the yarn form in which the gap between the constituent filaments is small, the free movement of the filament is restricted, and further, the difference in heat shrinkage is effectively exhibited by being restricted by the fabric structure. And it is not possible to sufficiently impart a feeling of fluff or swelling to the fabric.

On the other hand, in Japanese Patent Application Laid-Open No. 60-246829, three types of thermoplastic synthetic fiber yarns having different dyeing properties are combined and subjected to simultaneous false twisting to produce a composite processed yarn having a three-layer structure. A method has been proposed. The three-layer structure yarn obtained by this method is also
As in the method described in Japanese Patent Application Laid-Open No. 2-99632, the winding is caused by the difference in yarn length due to the difference in elongation. Has the drawback of easily occurring. This three-layer yarn is
Since it is composed of yarns having different dyeing properties, a multicolor feeling can be imparted by dyeing with different colors. However,
The heather form exhibited a monotonous coarse heather tone, and could not give the dense coarse feeling seen in the mixed fiber entangled yarn peculiar to air jet processing.

[0009]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional disadvantages, can impart a spun-like fluffiness and swelling to a fabric, and can express a multicolor heather effect. An object of the present invention is to provide a method for producing a multilayer composite air jet processed yarn.

[0010]

Means for Solving the Problems The present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, have found that a composite winding composed of two types of multifilaments having different dyeing properties and having a difference in yarn length. By arranging the crimped yarn on the sheath side and air-jet processing on the core side to arrange the latent crimpable composite filament with different dyeability from the sheath side yarn, it can express the swelling and multicolored appearance. The present invention has been found that it is possible to obtain a multi-layer processed yarn having fine loop fluff formed on the surface.

That is, according to the present invention, a highly dyeable cationically dyeable polyester yarn and a drawn polyamide yarn are aligned and subjected to false twist crimping to form a composite crimped yarn having a yarn length difference of 5% or more. Subsequently, when the composite crimped yarn and the polyester-based latently crimpable composite filament yarn having a single yarn fineness of 3 denier or more are simultaneously subjected to air jet processing, the supply amount of the composite crimped yarn is adjusted to the polyester-based latently crimpable composite yarn. Multi-layer composite characterized by forming an air jet process by oversupplying at least 5% of the supply amount of filament yarn and forming 100% / m or more of loop fuzz mainly composed of composite crimped yarn on the yarn surface. The gist of the present invention is a method for producing an air jet processed yarn.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail.

In the present invention, first, a high-oriented cationic dyeable polyester undrawn yarn (hereinafter, referred to as yarn A) and a drawn polyamide yarn (hereinafter, referred to as yarn B) are aligned and false twisted and crimped. After processing, the yarn length difference between yarn A and yarn B is 5%
It is necessary to make the above composite crimped yarn.

When the false twisting process is applied to the yarn A having a large elongation and the yarn B having a small elongation at the same time, a composite crimped yarn having a difference in yarn length accompanying the difference in elongation between the two yarns is obtained. However, in the present invention, the yarn length difference is set to 5% or more. The yarn length difference between the two yarns can be freely adjusted by appropriately selecting the elongation difference between the yarn A and the yarn B and the number of false twists.
The false twist coefficient (number of false twists (T / m) × fineness (denier) ^1/2 ) may be 20,000 or more. By setting the yarn length difference between the yarn A and the yarn B to 5% or more, the confounding property at the time of air jet processing is improved, and a multi-layer composite air jet processed yarn having a swelling can be obtained. If the yarn length difference is less than 5%, even if air jet processing is performed, a multi-layered yarn form cannot be obtained, and a conventional two-layered yarn form is obtained, and the feeling of swelling is insufficient, which is not preferable.

Next, in the present invention, the composite crimped yarn obtained as described above and a polyester-based latently crimpable composite filament yarn (hereinafter referred to as yarn C) having a denier of 3 denier or more are subjected to the same fluid treatment. Air jet processing is applied to the equipment. At that time, it is necessary to supply more than 5% of the supply amount of the composite crimped yarn than the supply amount of the yarn C. That is,
The core / sheath structure yarn is formed by core and effect processing in which the yarn C is disposed on the core side and the composite crimped yarn is disposed on the sheath side. Therefore, if the supply amount of the composite crimped yarn is less than 5% of the supply amount of the yarn C, the core / sheath structure yarn cannot be obtained, and the multi-layered swollen processed yarn intended for the present invention cannot be obtained. I can't get it. The fineness ratio between the composite crimped yarn and the yarn C to be supplied to the air jet processing is not particularly limited, but in order to obtain a swollen processed yarn, the ratio is 3: 1 to 1.
1: 1 is preferred.

According to the present invention, the composite crimped yarn is formed so that the core / sheath structure yarn is formed by supplying the composite crimped yarn at a supply amount of at least 5% of the supply amount of the yarn C, and the yarn is formed on the sheath side. As described above, since the yarn difference is 5% or more,
Only the sheath-side yarn has a two-layered yarn form. For this reason, the obtained multilayer composite air-jet processed yarn has a multilayered yarn form in which the yarn C constitutes the inner layer, the yarn B constitutes the middle layer, and the yarn A constitutes the outer layer. However, they are entangled with each other by complicated bending and mixing, and the voids between the filaments increase, resulting in a swollen yarn.

Generally, in air jet processing,
If the core and effect processing improves the confounding property compared to the single processing, and if the total fineness is the same,
Processing a plurality of yarns has a characteristic that the confounding property is better than processing a single yarn. In the present invention, the composite crimped yarn is used as the yarn arranged on the sheath side, focusing on the processing characteristics of the air jet. Accordingly, a higher degree of entanglement than the conventional entanglement of the core / sheath structure yarn is imparted, and a yarn excellent in form fastness is obtained.

In the present invention, since the yarn C (polyester latently crimpable composite filament yarn) having a single-filament fineness of 3 denier or more is used as the yarn arranged on the core side, the obtained processed yarn is used for fabric. After the heat treatment, latent crimps become apparent, and the volume of the fabric can be further enhanced. Further, by using a thick fine yarn having a single yarn fineness of 3 denier or more, it is possible to stretch the fabric and give it a stiffness. If the single yarn fineness is less than 3 denier, the fabric cannot be sufficiently stretched and stiffened.

Further, in the present invention, in the air jet processing, it is necessary to form 100% / m or more of loop fuzz mainly composed of composite crimped yarn on the yarn surface. For this purpose, the difference in supply amount between the core yarn and the sheath yarn is 5%.
As described above, it is important to keep the core yarn oversupply rate at 10% or more, preferably at 10% or less, so that the loop fluff of the core yarn does not protrude on the yarn surface. By performing air jet processing under such conditions, the loop fluff mainly composed of a sheath yarn is present in an amount of 100 pieces / m or more.
A feeling can be given. In addition, due to the crimping action of the composite crimped yarn serving as the sheath yarn, the loop fluff is densified, and an effective fluff feeling can be imparted without impairing the unwinding property and the knitting property. If the loop fluff is less than 100 pieces / m, it is not preferable because a sufficient span feeling cannot be expressed.

The multi-layer composite air jet yarn obtained by the present invention has the following effects in addition to the effects described above.
That is, since the yarn A, the yarn B and the yarn C are composed of three kinds of fibers having different dyeing properties, if they are dyed in different colors at the time of dyeing, a multicolor feeling can be expressed, and the air jet can be performed. A multicolor heather appearance effect can be given to the fabric in combination with the heather effect unique to the processed yarn.

Next, an embodiment of the method for producing a multi-layer composite air jet textured yarn of the present invention will be described with reference to the drawings.

In FIG. 1, the yarn A and the yarn B are drawn together and supplied to the false twisting area by the first supply roller 1, and between the first supply roller 5 and the heater 3 and the twisted body 4. False twist crimping is performed, and a composite crimped yarn D having a yarn length difference of 5% or more is obtained. The composite crimped yarn D is continuously supplied by 5% or more over the yarn C serving as the core yarn, supplied to the fluid treatment area, and guided to the fluid entanglement nozzle 6.

On the other hand, the yarn C serving as the core yarn is supplied from the second supply roller 2 to the fluid treatment area, and is guided to the fluid entanglement nozzle 6 together with the composite crimped yarn D.

The yarns C and D are subjected to air jet processing in the fluid entanglement nozzle 6, and have a core / sheath structure in which the yarn C is a core yarn and the yarn D is a sheath yarn, and the yarn C is an inner layer. The yarn B becomes a middle layer, and the yarn A becomes a multilayer composite air jet processed yarn constituting an outer layer. In addition, the yarn has fine loop fluff mainly composed of filaments of the yarn D (composite crimped yarn) on the yarn surface, and is wound up by the winding roller 8 via the second take-up roller 7 into a package.

In the present invention, as the fluid entanglement nozzle used in the air jet processing, any nozzle can be used as long as it can form entanglement and loop fluff on the yarn.
The yarn length difference (%) was determined as follows. First,
Collect composite crimped yarn before applying air jet processing and
m, the composite crimped yarn is separated into yarns A and B,
Measure the lengths a and b under an initial load of 0.1 g / d each,
Calculate the yarn length difference by the following formula. This is repeated 10 times, and the average value is shown. Yarn length difference (%) = [(ab) / b] × 100 Further, the number of loop fluffs referred to in the present invention is a fluff measuring device F
-This is a value measured using an index (manufactured by Shikishima Spinning Co., Ltd.), and is a value obtained by setting the gauge of the fluff measuring instrument to 0.3 mm and counting.

[0026]

Next, the present invention will be described in detail with reference to examples. The intrinsic viscosity [η] in the examples was determined by using an equal weight mixed solvent of phenol and ethane tetrachloride at a temperature of 20.
Measured in ° C.

Example 1 As the yarn A, a cationic dyeable polyester made of a copolymerized polyester obtained by copolymerizing an ethylene terephthalate unit as a main repeating unit and 1.5 mol% of a 5-sodium sulfoisophthalic acid component as an acid component was used. Oriented undrawn yarn (150d / 48f, elongation 110%), yarn B as polyamide drawn yarn (70d / 68f, elongation 50%), yarn C as isophthalic acid 8mol% and 2,2-bis Composite spinning using polyethylene terephthalate having an intrinsic viscosity [η] of 0.63 as a first component and polyethylene terephthalate having an intrinsic viscosity [η] of 0.53 as a second component obtained by copolymerizing 5 mol% of [4- (2-hydroxyethoxy) phenyl] propane. Using a side-by-side latently crimpable composite filament (100d / 24f, elongation 35%) obtained by stretching and having a crimping rate of 65% after boiling water treatment, In accordance with the steps we were subjected to false twist crimped and air-jet processing in the processing conditions shown in Table 1. The obtained multilayer composite air-jet processed yarn had fine loop fluff formed on the surface of the yarn with composite crimped yarn filaments, and exhibited a core / sheath multilayer structure excellent in entanglement.

The multilayer composite air jet processed yarn was used as a warp and a weft, and woven in a plain weave at a warp density of 55 yarns / 2.54 cm and a weft yarn density of 50 yarns / 2.54 cm. Next, dyeing was performed using a cationic dye (brown color), a disperse dye (beige color) and an acid dye (pink color). There was no problem with the weaving properties, and a woven fabric having a uniform fine loop fluff on the surface, having a bulging, spun-like appearance and texture, and exhibiting a multicolor heather tone was obtained.

Comparative Example 1 A false twist crimping process and an air jet process were performed in the same manner as in Example 1 except that the number of false twists and the excess supply rate during air jet processing were changed as shown in Table 1.

[0030]

[Table 1]

As is clear from Table 1, the difference in yarn length between yarn A and yarn B in the composite crimped yarn is as small as 4%.
Since the excess supply rate difference during air jet processing was as small as 3%, the obtained processed yarn had a core / sheath structure, but had few loop fluffs present on the yarn surface. The processed yarn was subjected to weaving and dyeing and finishing in the same manner as in Example 1, but the obtained woven fabric exhibited a multicolor heather tone, but lacked a swelling feeling and a spun-like feeling.

[0032]

According to the present invention, a highly oriented undrawn yarn and a drawn yarn are aligned and subjected to false twist crimping to form a composite crimped yarn, and then to a latently crimped composite filament yarn and air jet processed. In this case, since the composite crimped yarn is arranged on the sheath side, a multilayer composite air jet processed yarn having uniform entanglement and minute loop fluff can be obtained.

The multi-layer composite air-jet processed yarn obtained in the present invention has good knitting and weaving properties, and can be used for warp and weft of woven fabrics. Span-like appearance and texture can be given. In addition, since it is composed of three kinds of fibers having different dyeing properties, it is possible to give a multicolor heather appearance effect by performing different color dyeing.

[Brief description of the drawings]

FIG. 1 is a schematic process chart showing one embodiment of a method for producing a multilayer composite air jet textured yarn of the present invention.

[Explanation of symbols]

 Reference Signs List A A cationically dyeable polyester highly oriented undrawn yarn B Polyamide drawn yarn C Polyester latently crimpable composite filament yarn D Composite crimped yarn 1 First supply roller 2 Second supply roller 3 Heater 4 Twisted body 5 First take-off Roller 6 Fluid entangled nozzle 7 Second take-up roller 8 Take-up roller

Claims (1)

[Claims] Claims 1. A cationically dyeable polyester highly oriented undrawn yarn and a drawn polyamide yarn are drawn together and subjected to false twist crimping to form a composite crimped yarn having a yarn length difference of 5% or more.
When simultaneously air jet processing the composite crimped yarn and the polyester-based latent crimpable composite filament yarn having a denier of 3 denier or more, the supply amount of the composite crimped yarn is adjusted to the polyester-based latent crimpable composite filament yarn. Over supply of 5% or more than the supply amount of
A method for producing a multi-layer composite air-jet processed yarn, comprising forming at least 100 loops / m of loop fluff mainly composed of composite crimped yarn on the yarn surface.