JP2003171882A - Wound body of elastic yarn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wound body of an elastic yarn, from the side surface of which the yarn hardly slips down on winding or after the winding of the thick denier elastic yarn, and exhibiting a good loosening property. <P>SOLUTION: It becomes possible to attain a spinning speed higher and a winding amount larger by attaching an oil agent having 15-40 mm<SP>2</SP>/s viscosity at 30°C and ≥0.8 mm<SP>2</SP>/s.K temperature dependence of the viscosity expressed by [(viscosity at 10°C)-(viscosity at 40°C)]/30, and also adjusting twill angles. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wound body of elastic yarn, and more specifically, an elastic yarn having a stable unwinding property, which does not easily slip onto the side surface of the wound body during or after winding. Regarding the wound body.

[0002]

2. Description of the Related Art Conventional polyurethane-based elastic yarns, polyester-based elastic yarns, and the like, when the yarn is unwound from the elastic yarn winding body in a subsequent step, the yarn falls off from the surface layer of the winding body to the side surface, and troubles such as thread breakage occur. Is known to cause. Several solutions have been proposed for such a problem as described in Japanese Patent No. 2773374.

Further, there is a problem that the yarn slips down on the side surface of the wound body when these elastic yarns are spun and wound.
When observing the side surface of the wound body at the time of winding up, a slipped yarn, that is, a twilled yarn may be seen as shown in FIGS. 1 and 2. Also, even after winding, when storing, transporting,
Occasionally, the yarn slides down to the side of the wound body during handling.

Such slipping of the yarn onto the side surface of the wound body during or after winding often occurs particularly in a yarn having a large fineness. The reason for this is considered that the thicker the thread, the more difficult it becomes to uniformly attach the oil agent to the surface of the thread. Therefore, if the amount of the applied oil agent is increased, the oil agent oozes out from the wound body and stains the knitting machine or the loom, further causing scum. As a countermeasure against these problems, a method of increasing the traverse angle is performed, but it has been difficult to release the yarn from the wound body.

When the yarn slides down to the side surface of the wound body, the quality is deteriorated, and not only the passing rate of the product is lowered, but also the drop-off at the time of unwinding in the post-process as described above easily occurs. The risk of causing troubles such as thread breakage increases.

Further, because of the above problems,
Especially when the fineness becomes a large fineness of 155 decitex or more,
It is difficult to wind many yarns around one paper tube, and it has been difficult in the past to wind the yarn over 1 kg. As a result, the efficiency was poor and the cost was high.

[0007]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems, namely, at the time of winding or winding of elastic yarn, or after storage, during transportation, during handling, etc.
An object of the present invention is to provide an elastic thread wound body in which the yarn is less likely to slip on the side surface of the wound body, has an excellent unwinding property, and has a large winding amount.

[0008]

Means for Solving the Problems As a result of intensive studies to achieve the above-mentioned object, the present inventors have found that the viscosity of an oil agent attached to an elastic yarn having a large fineness and the temperature dependence of the viscosity are within a specific range. The inventors have found that a value within this range makes it difficult for the yarn to slip on the side surface of the wound body and stabilizes the releasing property, and has reached the present invention. That is, the elastic wound yarn body of the present invention has a viscosity at 30 ° C. of 15 to 40 mm ² / s and an oil agent having a temperature dependence of viscosity in the range represented by (Equation 1), and has an oil agent adhesion amount of 1 to 10 wt. %, Attached to the elastic yarn, and the traverse angle is 13 to 22 °.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The elastic wound body of the present invention will be described in detail below. The elastic thread wound body of the present invention is obtained by winding a polyurethane-based or polyester-based elastic thread on a paper tube or the like in a predetermined weight. In particular, in recent years, a large amount of winding, that is, large packaging has been promoted due to labor saving of processes and rationalization of transportation.
In the present invention, the amount of winding is 1 kg or more, preferably 2 kg or more in the fineness.

The oil agent for elastic yarns used in the present invention is particularly effective for its fineness with a fineness of 155 decitex or more.

The amount of the oil agent adhered to the elastic system is 1 to 10% by weight, preferably 2 to 6% by weight. If it is less than 1% by weight, it becomes difficult to release the yarn from the wound body due to adhesion between the yarns. Also 10 weight
If it exceeds%, the oil agent is scattered and the working environment is deteriorated, and it is also disadvantageous in terms of cost.

The oil agent attached to the elastic yarn of the present invention is 30 ° C.
The viscosity is 15 to 40 mm ² / s, and the temperature dependence of the viscosity is in the range represented by (Equation 1). If the viscosity at 30 ° C. is less than 15 mm ² / s · K, the effect of preventing slipping of the yarn onto the side surface of the wound body, which is the object of the present invention, becomes insufficient,
On the other hand, if it is greater than 40 mm ² / s, the adhesiveness between the threads will be too great, and it will be difficult to release the threads from the wound body. Further, if the temperature dependence of the viscosity is out of the range represented by (Equation 1), the amount of the oil agent attached to the elastic system fluctuates due to the fluctuation of the spinning environment temperature, and the releasing property becomes unstable. (Equation 1) [(viscosity at 10 ° C)-(viscosity at 40 ° C)] / 30 ≤ 0.8

As a method for applying the oil agent to the elastic yarn, known devices such as an oiling roller, an oiling guide, and a sprayer can be used. In the present invention, viscosity control can be optimized based on the dependence of viscosity and temperature, uniform deposition is possible with any device, and even in high-speed spinning at a spinning speed (winding speed) of 700 m / min or more. It became possible to adhere.

As a component of the oil agent, a known component as an oil agent for elastic yarn such as dimethyl silicone, mineral oil, modified silicone, amino-modified silicone, higher fatty acid magnesium salt, etc. is mixed and used at an arbitrary ratio. However, it is essential to be within the range described in Formula 1.

As a spinning condition, a traverse angle is an important factor, and an angle of 13 ° to 22 °, preferably 15 ° to 20 ° is set. If the angle is 13 ° or less, the cross-cut tends to occur, and if the angle is 22 ° or more, the winding hardness becomes high and the yarn in the inner layer of the wound body is tightened by the yarn in the surface layer to deteriorate the releasing property. In particular, this phenomenon is remarkable when the fineness is large. When the fineness becomes large, the surface area of the yarn becomes large, and it becomes difficult to uniformly attach the oil agent to the surface of the yarn, which is presumed to further affect the friction between the yarns and cause the phenomenon of twilling. Also, the winding amount can be increased by adjusting the traverse angle.

By using the oil agent of the present invention, the winding speed of the wound body, that is, the spinning speed can be set to 400 m / min or more, preferably 700 m / min or more by further adjusting the traverse angle. Generally, when the spinning speed is increased, the contact time between the oil agent applying device and the running yarn is shortened, and it is difficult to uniformly apply the oil agent to the surface of the yarn. However, in the oil agent of the present invention, the optimum range can be easily set according to the fineness, and it is particularly effective for the large fineness.

The present invention will be described below with reference to examples.
The present invention is not limited to these. The parts and% in the examples represent parts by weight and% by weight, respectively. The methods for evaluating the quality of the wound body, the stability of the oil agent adhesion rate, and the unwinding property in the examples are as follows. (Quality of wound body) When the number of slid threads (twill drop) with a length of 1 cm or more is 3 or less on the side surface of the wound body, it is ○, when it is 4 or more, it is ×, and 100 The probability of ○ in the wound body is defined as the wound thread quality pass rate (%). (Stability of oil agent adhesion rate) The oil agent adhesion rate is calculated from the weights of the polyurethane fibers collected from the wound body before and after the oil agent extraction by Petroleum Engineering. When the difference between the oil agent attachment rates when the temperature of the oil agent is between 10 ° C and 40 ° C is within 1.5%, it is evaluated as ○, and when it exceeds 1.5%, it is evaluated as ×. (Unwinding property) When the wound body is fed out and unwound at a speed of 50 m / min and winding 100 m / min, if the yarn can be unwound stably without being broken up to the innermost layer, it will be unwound. And

Examples 1 to 3 and Comparative Examples 1 to 4 175.37 parts of polytetramethylene ether glycol having a number average molecular weight of 1800 and 38.92 parts of 4,4′-diphenylmethane diisocyanate were reacted at 80 ° C. for 3 hours under a nitrogen stream, and both A prepolymer having an isocyanate group at the end was obtained. After cooling the prepolymer to 40 ° C, N, N-dimethylacetamide 3
08.36 parts were added and melt | dissolved, and also it cooled to 10 degreeC. A solution prepared by dissolving 3.58 parts of ethylenediamine and 0.46 parts of diethylamine in 146.86 parts of N, N-dimethylacetamide was added at once to the prepolymer solution which was being stirred at high speed, and mixed to complete the reaction. The viscosity of this solution at 30 ° C is 2000 pois.
It was e. Add 4.2% hindered amine compound to this solution.
9 parts, 2.15 parts of phosphite type antioxidant, 2.15 parts of phenolic type antioxidant, 1.08 part of benzotriazole type ultraviolet absorber, and 0.69 part of anti-adhesive agent are added and mixed with stirring to obtain a polyurethane solution. Got After defoaming the obtained polyurethane solution, it was extruded from a spinneret having a hole diameter of 0.3 mm and a number of holes of 28 holes into a spinning tube in which air heated to 240 ° C. was flown to evaporate the solvent, and after being converged by false twisting. ,table 1
The oil agent (30 ° C.) having the composition shown in (3) was applied while being wound by an oiling roller to obtain a wound body of polyurethane fibers of 310 decitex. The winding speed, the amount of applied oil, the traverse angle, and the winding amount are as shown in Table 1. When evaluating the oil agent adhesion rate stability, while maintaining the rotation speed of the oiling roller, the temperature of the oil agent was controlled at 10 ° C and 40 ° C to obtain a wound body of polyurethane fiber in the same manner, and at each temperature, The stability of the oil agent adhesion rate was evaluated from the measurement results of the oil agent adhesion rate.

Table 1 shows the evaluation results of the pass rates of the wound bodies of Examples 1 to 3 and Comparative Examples 1 to 4 and the stability of the oil agent adhesion rate.
As can be seen from this, the wound body within the scope of the present invention has good quality without traversing, and has stable oil agent adhesion rate and unwinding property. On the other hand, a wound body which is out of the scope of the present invention has a problem in either the quality, the stability of the oil agent adhesion rate, or the unwinding property, and cannot be said to be sufficient.

[0020]

[Table 1] Component A: Dimethyl silicone 1Omm ² / s Component B: Dimethyl silicone 20mm ² / s Component C: Dimethyl silicone 100mm ² / s Component D: Mineral oil 13mm ² / s Component E = Mineral oil 18mm ² / s Component F: Mineral oil 24mm ² / s Component G: Isostearyl alcohol component H: Koichi Tell modified silicone component 1: Silicone resin

[0021]

As described above, according to the present invention, the yarn is less likely to slip on the side surface of the wound body during or after the winding of the elastic yarn having a large fineness. As a result, the quality is good and the yarn breaks in the post-process. It is possible to obtain an elastic wound yarn body with less troubles and stable unwinding property.

[Brief description of drawings]

[Fig. 1] Example of a state in which a thread is slid in the diagonal direction and on the side surface of the wound body.

Claims (4)

[Claims] 1. A viscosity at 30 ° C. of 15 to 40 mm ² / s,
An elastic thread wound body characterized in that an oil agent whose viscosity temperature dependency is represented by the following (formula 1) is attached to an elastic thread and wound up. (Equation 1) [(viscosity at 10 ° C)-(viscosity at 40 ° C)] / 30 ≤ 0.8 2. The elastic yarn having a fineness of 155 decitex or more has an amount of the oil agent attached of 1 to 10% by weight and a twill angle of 13 °.
The elastic wound yarn body according to claim 1, wherein the elastic wound yarn body has an angle of about 22 °. 3. The elastic thread wound body according to claim 1, wherein the winding speed is 400 m / min or more. 4. The elastic thread wound body according to claim 1, wherein the wound amount is 1 kg or more.