JPS59100738A - Production of polyester slub yarn - 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 The present invention provides the 'CC straw part along the longitudinal direction of the yarn between J[+
Regarding the manufacturing method of the polyester sufushan having in t, more specifically, the high N polyester μ yarn is fed into the binding system along the longitudinal direction of the yarn. The present invention relates to a method for producing polyester sulfur intermittently.

In recent years, fabrics made from bori ester yarns have been given excellent features such as wash-and-wear properties, wrinkle resistance, moderate firmness, and long-wearing properties, so they have been playing an increasingly important role in clothing, especially mid- and outer-wear. ing.

However, consumer demands for clothing are becoming increasingly diverse, and in response to the trend toward fashion in the market, various differentiated materials such as C slub yarn are being proposed. In the past, various attempts have been made to obtain a polyester fabric having a large diameter part (slab part) that is darkly dyed and a narrow diameter part that is lightly dyed, consisting of an unstretched part along the longitudinal direction of the yarn9.
For example, by using an undrawn yarn with a birefringence index of 0.5 to 10×10″4 or a highly oriented undrawn yarn with a birefringence index of 15 to aoxt low 1 as a supply system, the stretching ratio can be changed mechanically, or the stretching ratio can be changed below the natural stretching ratio. Methods such as drawing at a magnification have been proposed. However, when using any of the above yarns as a supply system, the method of producing "C slab yarn" simply depends on the drawing conditions, so the length of the slab part and the appearance frequency It is difficult to adjust and the pattern range is narrow.

In addition, especially when using 1ijJ yarn as a supply system, there is a drawback that the slab part becomes brittle and easily breaks when subjected to heat treatment in the false twisting process, dyeing process, etc.

The present invention solves the above-mentioned drawbacks, and its purpose is to have deep dyeing slab parts intermittently along the longitudinal direction of the yarn, and to adjust the length and appearance frequency of the slab parts. It is an object of the present invention to provide a method for producing a polyester A/zurab yarn which is easy to prepare and which does not become brittle due to post-addition, I:.

That is, in the present invention, highly oriented polyester undrawn yarn with a birefringence index of 15 to 80 x 10-1 is drawn at a stretching ratio of 1.1 times the natural drawing ratio of the yarn between the 10th rule and the 20th rule. While stretching at the above stretching ratio, water or an aqueous liquid is intermittently applied to the yarn in the stretching area, and heat treatment is performed.
Polyester p characterized by being subjected to relaxation heat treatment under overfeed of 8% or more in the area between No. 1 and No. 60-M
This is a method for manufacturing Swop yarn.

Hereinafter, nine aspects of the present invention will be described in detail.

In the present invention, first, a highly oriented undrawn polyester yarn with a birefringence of 15 to 80 x 10"-" is drawn in a drawing area between the 10th and 20th rules to 1.1 times the natural drawing ratio of the yarn. While stretching at the above stretching ratio, water or an aqueous liquid is intermittently applied to the yarn in the stretching area to perform heat treatment. When water or an aqueous liquid is intermittently attached to the yarn in the drawing zone and subjected to heat treatment, a difference in internal structure occurs between the water-applied area and the non-water-applied area due to the difference in drawability due to the heat-receiving effect. , since the heat treatment effect does not reach or is extremely small on the wetted part, low orientation,
This results in a cold-stretched part with high shrinkage, while the non-wetted part is sufficiently given the heat treatment effect, resulting in a hot-stretched part with high orientation and low shrinkage.

The yarn obtained above, which alternately has low-oriented, high-shrinkage wetted parts and highly oriented, low-shrinkage non-watered parts in the longitudinal direction, is used as the 20th yarn.
- In the area between the 30th and 30th sections, a relaxation heat treatment is performed under an overfeed of 8% or more to form a slag in 44 parts of water. The birefringence must be 15 to 80
Necessary force for supplying the undrawn yarn for high orientation of −1 to the drawing region = Yes. In the case of yarn with a birefringence of less than 15XIQ-, it becomes brittle with a slight heat treatment and is likely to break during drawing or post-processing.
- In the case of yarns exceeding 1, the orientation is relatively advanced and the fibers are proximal to the drawn yarn. It is unsuitable because it is difficult to form a slab portion with clear bulkiness and deep dyeing properties.

In addition, in order to give the wetted part a sufficient internal structure difference to form a slab part that is bulkier and more dyed than the non-wetted part by relaxation heat treatment, the stretching ratio between the 10th and 20th μ's should be adjusted. It is necessary to perform a stretching force at a stretching ratio of at least 1.1 times the natural stretching ratio of the supply system and within a range that does not cause yarn breakage; intermittent water application and heat treatment are required. In this way, when intermittent watering and heat treatment are performed under excessive stretching of 1.1 times or more of the natural drawing ratio, the difference in heat reception due to the presence or absence of watering and the difference in stretching are the same. It is possible to increase the internal structure difference between the two, and this magnification is 1
．． If it is less than 1 time, there will be little difference in internal structure between the two, making it impossible to form a clear slab.

9. The natural draw ratio in the present invention is defined as the range in which the tension increases to breakage in the tension-draw ratio characteristics when undrawn yarn is statically drawn in an atmosphere at room temperature. Stretching ratio that exhibits a tension equal to the maximum tension of

In the present invention, C has a low orientation height of 1 in the stretching region as described above.
■A loose yarn with alternating properties of shrinkage, high orientation, and low shrinkage.
! Heat treatment is performed to form a slab part in a low-orientation, high-shrinkage part, and the slab part, which is sufficiently bulkier than other parts and capable of deep dyeing, is made with an appropriate length along the longitudinal direction of the yarn. In order to form water or aqueous liquid intermittently at desired intervals on the supply system in the stretching zone, heat treatment is performed to form wetted areas that are not affected by the heat treatment or are extremely small. It is necessary to make a low-orientation, high-shrinkage part, and to make a non-wetted part, where the heat treatment effect is sufficiently imparted, a high-orientation, low-shrinkage part. In this intermittent heat treatment method, the wetted part is a low orientation, high shrinkage part that is not affected by heat treatment, and the non-watered part is a highly oriented, low shrinkage part that is affected by heat treatment.

(1) Since this is a method in which C water or aqueous liquid is intermittently applied to the yarn that constantly passes through the heat treatment zone immediately before heat treatment, only the net wetted part has low orientation and high shrinkage. It becomes the sexual part.

(2) Since the heating effect of water or aqueous liquid is cut off by a small amount of C adhering to the supply system, there is a clear difference in the internal structure of the C at the boundary with the non-watered part.

etc., it is possible to form a slab part that is bulkier than other parts and can be dyed more deeply, corresponding to the length and spacing of the wetted part, and furthermore, it is easy to adjust the length and appearance frequency of the lug part, and it is possible to prevent marbling. It is possible to obtain slag yarns having a wide variety of pattern patterns, such as kasuri-like to kasuri-like.

In addition, the heat treatment after 1-intermittent watering is carried out in such a way that the effect of heat treatment does not reach or is extremely small on the wetted part, and the temperature of the non-watered part is kept at °C so that the heat treatment effect can be sufficiently applied. Under such heat treatment conditions, for example, the amount of water (or aqueous liquid) adhered to the wetted area should be increased, and it is desirable to increase the amount of water (or aqueous liquid) adhered to the wetted area while it is still in a wet state immediately after the heat treatment. , heat treatment temperature is 200-250
C. and the heat receiving time is 0.2 to 08 seconds. The heat treatment temperature is within the range where the yarn does not melt, and the drawing ratio is high to increase the internal structure difference between the wetted part and the non-watered part. Preferably, a heating device is used.

As described above, water or an aqueous liquid is intermittently applied to the yarn in the drawing area between the 10th rule and the 2nd rule. Relaxation heat treatment is performed in the area between and No. 30, but in order to shrink the wetted part and form a bulky nup that can be dyed densely by relaxation heat treatment, relaxation heat treatment is performed at an overfeed rate of 8% or more. °C It is necessary to shrink the wet part.

If the overfeed rate is less than 8%, the shrinkage of the wetted part will be insufficient, resulting in poor bulkiness and deep dyeing properties.

Also, the larger the overfeed rate is, the more shrinkage in the free state is promoted, and it is possible to form a slab part that is rich in deep dyeing, bulkiness, and crimpability. By appropriately changing the oat feed rate at 8% or more and within the processable range, the bulkiness and deep dyeing of the lug part can be controlled.
The yarn tension at the outlet of the heater for relaxation heat treatment was set to 51'F/(1
If the tension is as follows, it is possible to make the bulkiness and deep dyeing properties of the slab part even clearer.

The heat treatment temperature during the above relaxation heat treatment is 8% overfeed, and any temperature that can shrink the wetted part to 113 degrees Celsius (113°C) is sufficient, but preferably the lug part is It is possible to sharpen the bulkiness and deep dyeing property of the weft.In addition, it is preferable to perform the relaxation heat treatment without bringing the weft into contact with a heating device in order to shrink the wetted part in a free state.

In addition, oat feed rate and Get during relaxation heat treatment.

It is the value (expressed as a percentage) obtained by dividing the difference between the supply speed of the 20th rule and the take-up speed of the 30th rule by the take-up speed.

The yarn tension is the value obtained by dividing the tension measured at the heater outlet by the fineness of the yarn supplied to the 10th loop.

As mentioned above, the present invention has a birefringence of 15 to 80X10-"
While drawing a highly oriented undrawn polyester yarn at a stretching ratio of 1.1 times or more than the natural drawing ratio of the yarn, water or an aqueous liquid is intermittently attached to the yarn in the drawing area, and heat treatment is carried out. Next, relaxation heat treatment is performed under an overfeed of 8% or more, so that the wetted area, which has become less oriented and more shrinkable than the non-wetted area in the stretching area, shrinks during the relaxation heat treatment, resulting in higher bulk and dense dyeing than the non-wetted area. can form sexual slabs. Moreover, since the wetted part is a slab, it is easy to adjust the length and appearance frequency of the slab part by changing the length and spacing of the wetted part.It has a wide variety of pattern patterns, from C1 marbled style to kasuri style. A slag yarn is obtained, and by changing the overfeed rate during the relaxation heat treatment, the bulkiness and deep dyeing of the °C puffer portion can be controlled. Furthermore, since we supply highly oriented Ho1+ester yarn with a birefringence index of 15-80'X 10'''1, the slab part will not become brittle and break during slab yarn manufacturing or post-processing such as false twisting and dyeing. do not have.

The term "polyester" used in the present invention refers to a polymer having an ester bond in its molecular chain, and includes homopolymers typified by polyethylene terephthalate, copolymers or blend polymers thereof, and the like.

In addition, the aqueous liquid that is intermittently attached to the yarn in the drawing area contains a majority (50% by weight or more) of water, and the substances used outside Mito include surfactants, dyeing aids, and preventive agents. Examples include rust agents.

Any aqueous liquid may be used as long as it does not substantially dye or damage fibers or adversely affect the human body and machinery.
[Moyoi.

Furthermore, any method may be used to attach water or aqueous liquid to the yarn as long as it can be applied intermittently over an appropriate length.1 For example, a gear type deformation with protrusions on the roller surface may be used. How to attach it with a loaf and JP-A-49-554
An example of this method is to apply the electromagnetic solenoid method disclosed in Japanese Patent Publication No. 2003-121036 and bring the C yarn into contact with water or an aqueous liquid intermittently and at an arbitrary length.

9. In the present invention, the process up to the heat treatment in the stretching zone between the 10th line and the 20th line and the relaxation heat treatment process between the 20th line and the 60th line are performed discontinuously at °C. Also, continuous C
Good too.

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a schematic process diagram showing one embodiment for carrying out the present invention. Highly oriented polyester undrawn yarn (hereinafter referred to as supplied yarn) (1) is
20-A/[3) which rotates at a higher speed than the 1st o-/l/(2).

Ey (
It passes through the thread swing width guide (5) which is directly connected to 4) and reaches the arc guide (6), which is the fulcrum for swinging the thread.20 Thread swing width guide (5) and the support and guide An adhesion device for adhering water or aqueous liquid is installed between (6) and C;
(7) is a rotating loaf with water that is relatively small in diameter; (8)
is an aquarium, and (9) is water or an aqueous liquid. Here, the supplied yarn (1) contacts the water application rotating roller (7) with the fulcrum guide (6) as a fulcrum by the vibration 11 action of an electromagnetic solenoid whose signal source is a random 89-ph oscillator.
) to the farthest position (b) from the water rotary lower (7)
). At this time, use a rotating loaf with water (7
) The part where the yarn touches becomes the wetted part, and the part where it doesn't comes into contact with it becomes the non-watered part. The lengths of the water-containing part and the non-water-containing part and the ratio of the two lengths can be freely changed by using a microcomputer, a film-type photosensor, etc. together with a random pulse generation unit.

It is possible to create a wetted part and a non-watered part with a desired and appropriate length along the longitudinal direction of the yarn.

Next, the supplied yarn (1) passes through the fulcrum guide (6) and enters the first heater (II), where it is subjected to heat treatment while being drawn. 2nd heater Q between the
Relaxation heat treatment is performed by ◇, and a sweep O~ is formed in the wetted part as shown in Fig. Cfe2, and it is rolled up into C cheese α→ by winding roll lv (to).

The present invention will be specifically explained below using examples.

Examples 1-4. Comparative Examples 1-2 Highly oriented polyester undrawn yarn with a birefringence of 45 x 10'' obtained by spinning polyethylene terephthalate at high speed 230
d/48f (natural draw ratio: 1.553) was supplied to the apparatus shown in FIG. 1, and various processing conditions were changed to produce a C-sweep yarn. Table 1 shows the processing conditions and the properties of the slab portion of the obtained yarn.

As is clear from Table 1, in the yarns obtained in Examples 1 to 4 of the present invention, slab parts were formed that were bulkier and more dyed than other parts. It was bulky and darkly dyed. In addition, in the yarn of Example 4 in which the wetted time and non-wetted time were randomly changed, slab parts were formed in a pattern that corresponded well to the length and spacing of the wetted parts. [When the plain weave is woven and dyed and finished, the slab part does not become brittle. It has sufficient strength for C.Ikkawa, and the bulkiness of the slab part and the deep dyeing properties go hand in hand.It has a C fancy effect. It was excellent.

On the other hand, the slab portions of Comparative Example 1 with a small draw ratio and Comparative Example 2 with a small overfeed ratio were poor in bulkiness and density.

Table 1 (Note 1) The water and non-water application times of Example 4 were 0.1 and 0.
2. Random combinations of 0.5 seconds were performed at °C.

(Note 2) First heater: Non-contact heater with lid Second heater:
Thread contact heater with lid (Note 3) Property evaluation of slab part

[Brief explanation of drawings]

FIG. 1 is a schematic process diagram showing one embodiment of the present invention. Figure 2 is a side view of an example of the polyester slab yarn obtained in the same manner as above, and (1) in Figure 9 is highly oriented Borien'FA.
I undrawn yarn, (2) is the 1st o-rv, f3) is the 2-a-rv, (II is the 30th-rv. Patent applicant Unitika Co., Ltd.; 16 Ha4 -l≠ 13

Claims (2)

[Claims] (1) Highly oriented polyester undrawn yarn with a birefringence index of 15 to 80 x 10-1 is stretched at a stretching area of 1.1 times or more of the natural stretching ratio of the yarn between the 10th and 20th rules. While drawing at the drawing ratio, water or an aqueous liquid is intermittently attached to the yarn in the drawing area and heat-treated, followed by overfeeding of 8% or more in the area between the 20th and 30th lines. 1. A method for producing polyester sufshan, characterized by subjecting it to relaxation heat treatment. (2) The method for producing a polyester slag yarn according to claim 1, characterized in that the relaxation heat treatment is performed under an overfeed of 8951d and a tension of less than 5 #/d.