JPH0598529A - Conjugate blended yarn and its production - Google Patents

Abstract

PURPOSE:To obtain conjugate blended yarn capable of providing bulky cloth having peach skin touch by blending and interlacing yarn having single fiber fineness of definite value or below with specific yarn larger in single fiber fineness and hot water shrinkage than the above-mentioned yarn. CONSTITUTION:Yarn (A) having <=1d single fiber fineness and obtained by heat-treating highly oriented and undrawn yarn of polyethylene terephthalate and subjecting the yarn to simultaneous draw and false twisting by abrasion, and multifilament yarn (B) consisting of a copolyester being polyethylene terephthalate in >=85mol% units in the polymer chain and other polyester unit in residual <=15mol% units, having >=0.3g/d in thermal shrinkage stress and >=15% in hot water shrinkage are fed into a fluid jet nozzle and are subjected to fiber blending and interlacing treatment to provide the objective yarn being >=1.5d in single fiber fineness between these yarns A and B and <=No.4 to 5 in color difference between these yarns A and B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite mixed yarn suitable for obtaining a spunlike bulky fabric and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a large number of different shrinkage mixed fiber yarns in which high shrinkage yarns and low shrinkage yarns are mixed and entangled have been proposed in Japanese Patent Publication No. 61-13009. These different shrinkage mixed yarns are
All of them use the difference in shrinkage to give a slight swelling and fluffiness, but it was difficult to achieve a large bulkiness by heat shrinkage after fabric making. The reason for this is that the highly shrinkable yarns that compose these different shrinkage mixed yarns have low thermal shrinkage stress even though the hot water shrinkage rate is high. This is because the shrinkage ratio was not sufficiently exhibited and the bulkiness of the fabric could not be increased.

Highly shrinkable yarns use a copolyester in order to increase the hot water shrinkage, but the copolyesters generally have a high dyeing property, so that a low shrinkable yarn, especially The difference in dyeability between the low shrinkage yarn exhibiting low dyeability due to the single yarn fineness of 1d or less becomes extremely large, which causes a dark and light color difference in the dyed fabric, which causes irritability. There was a drawback that the quality was remarkably reduced.

[0004]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned conventional drawbacks and does not require any special bulkiness during yarn processing.
A composite mixed yarn that can be easily knitted and woven, and that can be made bulky and have a touch feeling of peach skin touch by heat shrinkage after being made into a cloth, and that can be made into a cloth with an irritating appearance It is a technical subject to provide a method of manufacturing the same.

[0005]

Means for Solving the Problems As a result of intensive studies for solving the above problems, the present inventors have used a yarn having a high heat shrinkage stress as a highly shrinkable yarn, and have a low dyeability. By heat treating yarns with small yarn fineness to make them highly dyeable, it is possible to make them bulky by heat treatment after making them into a fabric, and the resulting fabric has a peach skin touch feel and is free from irritation. This has led to the present invention.

The present invention has the following constitution in order to solve the above problems. (1) Multifilament yarn A having a crimp with a single yarn fineness of 1 d or less, and a single yarn fineness and a hot water shrinkage ratio higher than the yarn A, a heat shrinkage stress of 0.3 g / d or more, and a hot water Shrinkage rate is 15
% Of the multi-filament yarn B is mixed, and the single yarn fineness difference between the yarn B and the yarn A is 1.5.
d or more and the color difference between the yarns A and B after dyeing is 4 to 5
Composite mixed yarn characterized by less than No.

(2) Polyethylene terephthalate A highly oriented undrawn yarn is heat-treated and then subjected to simultaneous drawing and false twisting. The yarn A has a single yarn fineness of 1 d or less and a constituent unit of 85 mol% or more in a polymer chain. Is polyethylene terephthalate and the remaining 15
A multifilament yarn B composed of a copolyester whose constituent unit is less than mol% is another polyester unit, and has a heat shrinkage stress of 0.3 g / d or more and a hot water shrinkage rate of 15% or more.
A method for producing a composite mixed fiber, comprising:

The present invention will be described in detail below.

In the composite mixed yarn of the present invention, a yarn A having a crimp having a single yarn fineness of 1 d or less and a yarn B having a single yarn fineness and a hot water shrinkage ratio larger than those of the yarn A are mixed. It is a thread,
One of the objects of the present invention is to obtain a mixed fiber that can be made bulky by hot water treatment after making it into a fabric. As yarn B, the heat shrinkage stress is 0.3 g / d or more, and hot water is used. It is necessary to use multifilament yarn with a shrinkage rate of 15% or more. Thread B
Has the above-mentioned physical properties, the composite mixed yarn can exhibit a sufficient shrinking force during hot water treatment after being made into a fabric. Therefore, the fine yarn A having a single yarn fineness of 1d or less is formed on the outside of the composite mixed yarn. Can be distributed to. Heat shrinkage stress of yarn B is 0.3g / d
Below, in all cases where the hot water shrinkage ratio is less than 15%, the shrinkage during hot water treatment after forming the fabric is insufficient, and the bulkiness of the fabric cannot be achieved.

Further, the filament fineness of the filament B is preferably larger than the filament A by 1.5d or more, and the filament B filament is larger than that of the filament A. By doing so, the fabric B can be provided with elasticity and stiffness by the yarn B arranged on the core portion by the hot water treatment after forming the fabric.

As the yarn A which is mixed and entangled with the yarn B having a high heat shrinkage stress, a yarn having a hot water shrinkage rate at least lower than that of the yarn B is used, and it is preferable that the hot water shrinkage difference is 5% or more. .. Due to this difference in hot water shrinkage, the bulge of the yarn increases due to the hot water treatment after forming the fabric, and at the same time, the yarn A having a low hot water shrinkage ratio comes to the surface of the fabric. Then, the fineness of the single yarn is 1 as the yarn A protruding on the surface of the fabric.
By using a multi-filament of d or less, it is possible to enhance the soft feeling and the touch feeling of peach skin touch. Further, since the yarn A has crimps, the bulge increases, and the slimming and bulging effects can be imparted.

[0012] Normally, when a mixed yarn of different fineness is dyed, the thick fineness side appears dark and the fineness side looks light. The composite mixed yarn of the present invention is also a mixed yarn of different fineness in which the single yarn fineness of the yarn B is larger than that of the yarn A, and the yarn B of large fineness is preferably made of copolymerized polyester and has high dyeing property. However, since the dyeing property of the yarn A is high and shows the same dyeing property as the yarn B, the color difference after dyeing between the yarns A and B is less than Nos. 4 to 5, Even if it is a cloth, it does not cause irritation.

FIG. 1 is a schematic side view showing a state after the hot water treatment of the composite mixed yarn of the present invention, in which the single filament of the yarn A is arranged outside with forming a fine loop. ，
The yarn B having a large fineness constitutes the core portion.

Next, a method for manufacturing the composite mixed yarn of the present invention will be described.

First, polyethylene terephthalate highly oriented undrawn yarn is used as the supply yarn for the yarn A, and this yarn is subjected to heat treatment. The highly oriented undrawn yarn supplied to the heat treatment preferably has a birefringence (Δn) of 20 × 10 ⁻³ to 80 × 10 ⁻³ . If the birefringence is less than 20 × 10 ^-3 , thermal deterioration will occur,
Operability is poor. On the other hand, if it exceeds 80 × 10 ^-3 , it becomes difficult to enhance the dyeability by heat treatment, which is not preferable.

The heater temperature during heat treatment is preferably 250 to 550 ° C., though it depends on the heat treatment time. Heat treatment temperature is 250 ℃
If it is less than 550, it becomes difficult to improve the dyeing property,
If the temperature exceeds ℃, the yarn will be cut and the operability will decrease, which is not preferable. The heat treatment time is preferably 1.5 seconds or less. The overfeed rate during heat treatment is 5% or more, and the upper limit is before the yarn is cut. Overfeed rate is 5
If it is less than%, the yarn stretches and the birefringence increases,
It becomes difficult to improve the dyeability.

Next, the yarn that has been heat-treated as described above is subjected to simultaneous drawing and false twisting to obtain a yarn A. The false twist method at this time is not particularly limited, and a friction method, a spindle method, or the like can be adopted.

As a false twisting condition, the draw ratio is 1.10 to 1.
60 times is desirable. If the draw ratio is less than 1.10 times, untwisting occurs and the quality deteriorates, and if it exceeds 1.60 times, yarn breakage and fluffing easily occur. In the case of friction type, D / Y (surface speed of twister / thread speed) is set so that K value (untwisting tension / twisting tension) is in the range of 0.6 to 1.0 times. Is preferred. When the K value is less than 0.6 times, a constriction occurs,
If the yarn shape becomes poor and exceeds 1.0 times, fluff and cotton wool are generated, and the operability is deteriorated, which is not preferable. The false twist heater temperature is preferably 170 to 230 ° C. False twist heater temperature is 170 ℃
When it is less than 1, the crimpability is weak and it becomes difficult to obtain a textured yarn having a bulge. Also, when the temperature exceeds 230 ° C, constrictions and untwisting occur and the yarn appearance tends to deteriorate.

When the color difference between the yarn A obtained by performing the simultaneous drawing and false twisting process and the yarn obtained by performing the simultaneous drawing and false twisting process on the same supply yarn without heat treatment is 1
The yarn A has a high dyeing property.

Next, in the present invention, the yarn A and the yarn B are supplied to the fluid jet nozzle to be subjected to a mixed fiber entanglement treatment to obtain a composite mixed fiber yarn in which the yarns A and B are mixed and entangled. .. The yarn B supplied to the fluid jet nozzle is made of a copolymerized polyester in which 85 mol% or more of the structural units in the polymer chain are polyethylene terephthalate and the remaining 15 mol% or less of the structural units are other polyester units. Shrinkage stress is 0.3g / d or more,
Multifilament yarn with a hot water shrinkage of 15% or more is required. If the polymerization ratio of the copolyester is out of the above range, it becomes difficult to obtain a yarn having a heat shrinkage stress or a hot water shrinkage ratio in the above range.

In the present invention, since the crimped yarn which has been false twisted is used as the yarn A to be mixed and entangled with the yarn B, the entanglement property at the time of mixed entanglement is improved and a uniform mixed entangled yarn is obtained. You can The supply rates of both yarns supplied to the fluid jet nozzle may be the same or different. Especially thread A is thread B
If it is over-supplied, it becomes a composite mixed yarn in which a yarn with a fine single yarn becomes a side yarn to form a loop, the bulge is further increased, and a soft yarn can be obtained.

The type and structure of the fluid jet nozzle used for the fluid entanglement processing, the entanglement conditions, etc. are not limited in any way, and any element capable of mixed fiber entanglement may be used.

Yarns A and B constituting the composite mixed yarn of the present invention
The material is not particularly limited as long as it satisfies the above-mentioned physical properties, but both yarns are preferably polyester.

Next, a method for manufacturing the composite mixed yarn of the present invention will be described with reference to FIG. In FIG. 2, first, the polyethylene terephthalate highly oriented undrawn yarn 1 is heat-treated by a heater 6 between a first feed roller 5 and a second feed roller 7 through a guide 3, and then a second feed roller 7 and a first delivery roller 10 are provided. The heater 8 and the false twisting and twisting device 9 between the two are twisted to form the yarn A.

On the other hand, the high-hot-water shrinkable yarn B is supplied to the fluid injection nozzle 12 together with the yarn A through the guide 4 and the third feed roller 11 and, after being subjected to the mixed fiber entanglement treatment,
The second delivery roller 13 pulls it out as a composite fiber, and the winding roller 14 winds it into a package 15.

The characteristic value measuring method in the present invention is as follows. (1) Hot water shrinkage The yarn is wound 10 times with a measuring instrument (circumferential 1.125 m) to form a ring, and the initial load of 1/10 g per 1d is applied to obtain the length X,
Then, soak it in boiling water for 30 minutes in a free state, let it air-dry, and apply a load of 1/10 g per 1 d again to length Y.
And calculate with the following formula. Hot water shrinkage (%) = [(X−Y) / X] × 100

(2) Heat shrinkage stress Using a KE-2 type heat shrinkage measuring instrument manufactured by Kanebo Engineering Co., a sample having a length of 16 cm was made into a ring shape with a length of 8 cm, an initial load of 1/30 g / d, and a heating rate of 100 ° C. / The stress corresponding to the temperature is recorded in a recorder, and the value obtained by removing the peak stress value by the denier of the yarn is taken as the heat shrinkage stress (g / d).

(3) Color difference In the case of a tubular knitted fabric in which yarns A and B are connected to form a tubular knitted fabric, for example, in the case of a polyester-based composite mixed yarn, a dye, Mitsubishi Kasei Co. Subrague HG-FS 1% Disper TL 2g / Little, acetic acid 0.2cc / Little, bath ratio 1:50, after dyeing at 130 ℃ × 30 minutes, the color difference of each connected part of this tubular knitted fabric is JIS L-0804 It is determined by the gray scale for discoloration and fading.

[0029]

EXAMPLES Next, the present invention will be specifically described by way of examples.

Example 1, Comparative Example 1 80d / 168f polyethylene terephthalate highly oriented undrawn yarn obtained by high-speed spinning was fed to the first feed roller in the process shown in FIG. 2, the heat treatment temperature was 300 ° C., and the overfeed rate was 10%. % Heat treatment, and then false twist heater temperature 170
℃, D / Y 2.230, draw ratio 1.285, twisting tension 35g, K
A false twisting yarn was obtained by carrying out simultaneous drawing false twisting with a value of 0.7. The hot water shrinkage of this thread A was 5.2%.

Further, a polyethylene terephthalate type copolyester containing 10 mol% of isophthalic acid component is spun and then stretched to obtain a hot water shrinkage ratio of 32% and a heat shrinkage stress of 0.
Yarn B of 30d / 12f, which is 5g / d, was obtained.

Then, the overfeed rate of the yarn B is set to 0.
%, And the overfeed rate of the yarn A was 3.5%, the air entanglement treatment was simultaneously performed with the air entanglement nozzle pressure of 3 kg / cm ² , and a 90d / 176f composite mixed yarn was obtained. (Example 1)

Next, the 80 d / 48 f polyethylene terephthalate highly oriented undrawn yarn was supplied to the simultaneous drawing false twisting process without heat treatment and the drawing ratio was changed to 1.310 times under the same conditions as in Example 1. And processed to obtain a composite mixed yarn.
(Comparative Example 1)

The resulting composite mixed yarn was used as a warp, and weaving was performed using 100d / 24f ordinary polyethylene terephthalate false twisted yarn as each weft. The obtained woven fabric was subjected to relax treatment (130 ° C. × 20 minutes) and then dyed black with a disperse dye in accordance with a usual polyester dyeing recipe.

Among the obtained woven fabrics, the one from Comparative Example 1 was a fabric with a color difference of 1 and gray dots in black, so-called irritated, and no soft feeling. It was On the other hand, the fabric from Example 1 was a product that had a color difference of No. 5, had a clear black color, and was bulky and soft.

[0036]

EFFECTS OF THE INVENTION The composite mixed yarn of the present invention makes it possible to increase the bulkiness by heat treatment after forming a fabric due to the characteristics of the yarn B having a high hot water shrinkage ratio and a high heat shrinkage stress. By making the yarn A having a fine single yarn fineness with a high density, a soft and uniform coloring effect can be obtained, and a fabric without flicker can be obtained.

According to the method for producing a composite mixed yarn of the present invention, the composite mixed yarn having the above advantages can be easily and stably produced.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an embodiment of a composite mixed yarn of the present invention.

FIG. 2 is a schematic process drawing showing an embodiment of the method for producing the composite mixed yarn of the present invention.

[Explanation of symbols]

 6,8 Heater 9 False twisting device 12 Fluid injection nozzle

Claims (2)

[Claims] 1. A multifilament yarn A having a crimp of a single yarn fineness of 1 d or less, a single yarn fineness and a hot water shrinkage ratio larger than that of the yarn A, and a heat shrinkage stress of 0.3 g / d or more, A composite mixed yarn in which a multifilament yarn B having a hot water shrinkage ratio of 15% or more is mixed, and the single yarn fineness difference between the yarn B and the yarn A is 1.5d or more, and the yarn A composite mixed yarn, wherein the color difference between the dyes A and B after dyeing is less than that of Nos. 4 to 5. 2. A polyethylene A terephthalate highly oriented unstretched yarn is heat treated and then subjected to simultaneous drawing and false twisting. The yarn A has a single yarn fineness of 1 d or less and a constituent unit of 85 mol% or more in a polymer chain. A multifilament yarn B made of polyethylene terephthalate and composed of a copolyester in which the remaining 15 mol% or less of the constituent units are other polyester units and has a heat shrinkage stress of 0.3 g / d or more and a hot water shrinkage ratio of 15% or more.
A method for producing a composite mixed fiber, comprising: