JPS63147780A - Cheese type package of yarn and winding method - Google Patents

Abstract

PURPOSE:To obtain a package with stable form by winding untwisted yarn of synthetic fiber having a rupture elongation of 90% or less with a specified angle of traverse, and by giving a specific value or below to the difference in the dry heat contraction stress in the yarn longitudinal direction incl. the tab height part. CONSTITUTION:A bobbin shaft 1 is coupled with a bobbin/shaft drive device 4 and driven under frequency control by a bobbin shaft drive inverter 8 so that the surface linear speed of a package 3 to be wound on a bobbin 2 fitted on the bobbin shaft 1 becomes constant. A contact roll 5 is coupled with a drive device 7 through a belt 6, and a drive inverter 9 controls this drive device 7 so that the surface linear speed of the contact roll 5 is identical to that of the package 3. The contact pressure between the contact roll 5 and the package 3 shall be below 3kg per package. A yarn guide traverses the yarn in the axial direction so that the angle of traverse becomes 4.5 deg.-6.5 deg., to form a package 3 in cheese form. Thus a package is provided, which has good form stability and is capable of supplying yarn directly to textile.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a cheese-like package of thermoplastic synthetic fiber yarn. More specifically, the present invention relates to a cheese-like package of thermoplastic synthetic fiber yarn that has good shape stability and that allows a knitted fabric of excellent quality to be obtained by directly applying the yarn from the package to a knitted fabric.

[Problems that conventional technology and inventions attempt to solve] In recent years,
In the production of thermoplastic synthetic fibers, there has been a strong demand for improved productivity, and the high-speed spin draw method (for example, Japanese Patent Application Laid-Open No. 1983-1999 -1613, etc.), and high-speed spinning take-off methods that use a high take-off speed of over 4000 tn/min in the spinning process (for example, JP-A-57-143).
514 Publication, 58τ208416 Bulletin, etc.) began to be attempted.

However, to take full advantage of the above advantages,
Significant challenges remain to be solved in high-speed winding. One of the reasons is that the thermoplastic synthetic fiber yarn obtained by the aforementioned high-speed spin draw method or high-speed spinning take-off method can be used for ttig weaving, especially when it is used in woven fabrics.
However, there is a drawback that minute gloss spots called "sink marks" on the fabric surface are extremely likely to occur due to heat treatment. After the "sink mark" defect becomes apparent, the fabric becomes virtually worthless.
This is a serious problem in practical terms.

The cause of such "sink mark" defects during high-speed winding is the effects of stress irregularities such as heat generation, elongation, and compression on the yarn when winding thermoplastic synthetic fibers into cheese-like packages at high speed. This is because the package remains internalized as filamentous spots.

Thread unevenness is typified by heat shrinkage characteristics, and appears as "sink marks" when knitted fabrics are heat-treated at temperatures above about 60°C.

Such thread unevenness tends to be concentrated at both ends of the cheese-like package. This is because during the formation of the package, as a result of the traversing caused by traversing, many threads are formed at both ends of the package in the bobbin axis direction. This is thought to be due to the fact that the layers are stacked to form a so-called high-edge shape, and this high-edge portion comes into contact with the contact roll of the winder.

For high-speed winding of 4,000@/min or more, generally a bobbin shaft drive type winding machine is used in which a bobbin shaft with a contact ring is directly driven. The winding mechanism of this bobbin shaft-driven winding machine winds up a package formed by laminating yarn on a bobbin with good shape stability while being compressed by contact rolls.

At this time, all the power necessary to rotate the contact roll is transmitted through frictional contact between the package and the contact roll. (This type of contact pull drive method is called a "driven method."

) In order to perform high-speed winding with such a bobbin shaft-driven winding machine equipped with a driven contact roll, a large amount of energy must be transmitted, so it is difficult to wind up any package shape other than the one with the edge height. As a result of the study, it became clear that it was difficult to maintain the normal shape inside. Japanese Patent Laid-Open No. 60-209013 mentions that it is difficult to eliminate yarn unevenness with conventional bobbin shaft drive type winding machines for producing cheese-like packages because contact rolls are attached. As an alternative, they have proposed winding the package in a tapered pattern without contacting other objects during winding.

Therefore, it is a cheese-like package that is wound at a high speed of 4000V or more, has good shape stability, and is a thermoplastic composite that does not cause "sink" defects when the yarn is directly applied to knitted fabrics from the package. At present, a cheese-like package made of fiber yarn has not yet been found.

The present invention provides a cheese-like package of thermoplastic synthetic fiber yarn that has good shape stability and can be used to directly apply the yarn from the package to knitted fabrics to obtain knitted fabrics of excellent quality without "sink" defects. For the purpose of providing.

[Means for solving problems]

As a result of intensive studies aimed at solving the above problems, the inventors of the present invention have found that the filamentous unevenness that causes "sink marks" is deeply related to the winding method of the cheese-like package and the shape of the package. Focusing on this, we found that the "sink mark" could be completely eliminated by stacking threads at a specific edge angle to form nine packages, and the above problem was solved.

That is, the present invention does not laminate substantially untwisted synthetic fiber yarns with a breaking elongation of 90 inches or less, and the edge angle formed by the yarns is 4.00 inches.
The angle is ~5.5°, and the difference in dry heat shrinkage stress value in the yarn length direction of the yarn including the yarn at the selvage part and the yarn in other parts is 40
To provide a cheese-like package of thermoplastic synthetic fiber yarn characterized by having a fiber resistance of 1yF/d or less.

Furthermore, in the present invention, when winding the yarn into a cheese-like package using a bobbin shaft-driven winding machine for 4000.7 minutes or more, a winding machine having a self-driven contact roll is used, and the winding edge angle t-4 , 0° to 5.5°, and a method for winding a thermoplastic synthetic fiber yarn, which is characterized in that it is wound at a contact pressure of 3 powders/package or less.

The high-speed winding referred to in the present invention refers to winding the thermoplastic synthetic fiber yarn at a winding speed of 4000 m/min or more, and typical examples include JP-A-57-16913 and JP-A-57-14.
This method is applied to high-speed spring warming methods disclosed in Japanese Patent No. 3514, Japanese Patent No. 58-208416, and the like.

The thermoplastic synthetic fiber yarn as used in the present invention refers to thermoplastic polyester represented by polyethylene terephthalate, polyethylene terephthalate, etc., thermoplastic polyamide represented by polyhexamethylene adipamide, polycaproamide, etc., polypropylene, polyethylene, etc. Synthetic fiber yarn obtained from fiber-forming thermoplastic polymers such as thermoplastic polyolefins.

The thermoplastic synthetic fiber yarn of the present invention is wound onto a bobbin without being wound up once after spinning and cooling, and without being stretched or drawn, and is essentially untwisted. It is distinguished from those that have unraveling due to winding, etc.

Since the yarn is taken out of the package and directly applied to the knitting fabric, it is preferable that the yarn has sufficient mechanical properties to withstand handling in the knitting and weaving process. For typical general-purpose materials such as polyethylene terephthalate, polyhexamethylene adipamide, and polycaproamide, it is desirable that the strength be 3174 or more and the elongation be 9G'1 or less.

The package of the present invention has an edge angle of 4.0° to 5.
．． The angle must be 5°.

The ridge angle formed by the threads is the ridge angle of the threads laminated on the package in the schematic diagram of the package shown in FIG.

In high-speed winding, the setting of the edge angle is extremely important, especially in order to obtain a large number of cheese-like packages with a good winding shape stability of several kilograms to more than ten kilograms.

That is, when the edge angle becomes low, it becomes difficult to maintain a normal shape during winding, resulting in so-called winding collapse.

Further, even after winding, the winding often collapses when the package is moved or transported. For this reason, in high-speed winding packages, the edge angle of the threads is 6 degrees or more, and the edges are usually stacked at 7 to 8 degrees. On the other hand, it has been revealed that when yarns are laminated at such a high edge angle, the resulting package has a shape with a pronounced selvage height, and the occurrence of "sink marks" due to thread unevenness becomes significant.

The present invention is a cheese-like package obtained by employing a special winding method described below, which has a yarn edge angle of 4.0° to 5.5'', good winding shape stability, and a small edge height.

If the edge angle of the yarn is less than 4.00, a package with a stable winding shape cannot be obtained no matter how the winding conditions are changed. Edge angle is 5
．． If it exceeds 5°, the selvage height becomes noticeable and a package with uniform thread quality cannot be obtained. In view of the stability of the winding shape and the purpose of eliminating filament unevenness, a more preferable edge angle is 4.5 to 5.5 degrees.

By setting such a specific edge angle, it is possible to achieve extremely good winding shape stability and a reduction in the selvedge height, not only when winding a few kilograms but also when winding a large amount of tens of kilograms.

In addition to the above-mentioned ridge angle, the cheese-like package of the present invention has
The dry heat shrinkage stress value difference (Fs-Fg) in the yarn length direction of the yarn including the yarn at the selvedge part and the yarn at other parts is 40"
The second feature is that it is less than f/d.

As a result of careful consideration of the correspondence between the occurrence of "sink mark" defects and the yarn quality unevenness of the yarn of the package, the present inventors found that the unevenness of the dry heat shrinkage stress value of the yarn of the package in the yarn length direction. "Sink"
We found that it corresponds well with the occurrence of As a result of further investigation, it was found that the yarn in the contact area between the package and the contact roll during winding tends to have a higher dry heat shrinkage stress value than the yarn in the non-contact area, and this stress value difference exists. It has been found that if it is below this value, "sink marks" will not occur. The package of the present invention has a dry heat shrinkage stress value difference of 40 Cape A or less in the yarn length direction of the yarn including the yarn at the selvedge part and the yarn at other parts as measured by the method described below. It is formed. In order to further reduce "sink marks", the shrinkage stress value difference is preferably 20111177d or less, more preferably 15
It is good if it is 119/d or less.

The edge height package obtained by conventional winding with an edge angle of 6 degrees or more has a dry heat shrinkage stress value difference of 4011 F/ The advantage of the package of the present invention is clear from the fact that it cannot be less than d. Note that such heat shrinkage stress characteristics are satisfied from the beginning of winding of the package to the end of winding O1.

The method for manufacturing the cheese-like package of the present invention will be described below.

The package of the present invention has a winding edge angle of 4 during high-speed winding.
．． A k winding angle of 0° to 5.5° was only possible by using a winding machine with self-driven contact rolls.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a winding machine for carrying out the method of manufacturing a mesh cage of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 82 shows a main part configuration of a winding machine for carrying out the winding method according to the present invention. Before explaining the winding method of the present invention based on FIG. 2, referring to FIG. 3, the gap point in the conventional winding method will be explained.

FIG. 3 shows the overall configuration of a winding machine that winds up yarn.

In FIG. 3, the yarn 13 being wound, which is fed through the yarn 7 guide 14, is traversed in the axial direction of the contact roll 5 by the traverse device 1O, and is passed through the rotating contact roll 5. Then, a cheese-like package 3f is formed and wound around the outer periphery of the bobbin 2 to which the rotating bobbin shaft 1 is attached. The yarn 13 reciprocated by the traversing device 10 forms selvedge portions 11 at both ends of the package 30. Therefore, the package 3 includes only the contact roll 5 and the high edge portion 11.
If they do not come into contact with each other, the intermediate surface of the package 3 will be in a state with a gap Δh. A rotational force is transmitted to the contact roll 5 via the selvage portion 11, and during high-speed winding, this rotational transmission force stretches the yarn 13 of the selvage portion 11.
The heat generation creates a difference in yarn quality between the intermediate part 2 of the winding body 13 and the yarn of the selvage part 11.

In order to transmit rotational force between the contact roll 5 and the bagage 3 without causing slippage, a well-known passage and an excessive contact pressure are required, and the contact pressure is applied to the ear height part 11. It impairs the winding shape which acts as a crushing force and at the same time increases filamentous unevenness.

As shown in FIG. 2, in the ninth embodiment of the device for carrying out the winding method according to the present invention, the bobbin work is connected to a bobbin shaft drive device 4, and furthermore, the bobbin shaft is The package 30, which is attached to the bobbin shaft 1 and wound onto the surface of the next bobbin 2, is driven by a drive inverter 8 while controlling the frequency so that the surface circumferential speed of the package 30 is constant. On the other hand, the contact roll 5 is connected to a contact roll drive device 7 via a transmission device 6, and is further connected to a contact roll drive inverter 9.
The frequency and driving force necessary for rotation of the contact four wheel 5 matching the surface peripheral speed of the package 30 are supplied. The contact roll used in the present invention is therefore a self-driven contact roll.

The drive inverter of the bobbin shaft and the drive inverter of the contact roll may be mutually adjustable mechanisms as shown in Japanese Patent Application Laid-Open No. 52-21438, but it is possible to more completely eliminate thread unevenness. For this reason, it is preferable that both drive inverters are controlled independently of each other so that the speed of the contact rolls can be controlled with high precision.

In this case, as a control method to gradually reduce the bobbin shaft rotation speed as the winding diameter of the package increases, there is a method in which the gradual reduction speed is memorized in a computer and controlled, and a tension control method in which the change in tension applied to the yarn is controlled by feedback. For example, a peripheral speed control method is adopted in which the peripheral speed of the pressure roll or the wound body is controlled by feeding back changes in the peripheral speed.

It is preferable to use a high-speed three-phase induction motor as the contact roll drive device 9 used in the winder of the package manufacturing method of the present invention. The connection method of this motor is not limited to the embodiment, and may be directly connected to the shaft of the contact roll, or may be incorporated in the contact roll to implement an actor-type motor. Furthermore, it is also possible to use an air turbine drive instead of a motor.

The driving force supplied to drive the contact roll is determined by the difference between the circumferential speed of the contact roll measured without winding and in a non-contact state with the bobbin shaft, and the desired circumferential speed of the wound body. Assuming that the driving force at the same speed is 100%, if the driving force is within the range of 75 inches to 125 inches, the object of the present invention to obtain a package having a good winding shape and uniform yarn quality can be sufficiently achieved.

Normally, 100% is adopted. (Hereinafter, "Zoo" is indicated unless otherwise specified.) However, the frequency should be within the range of 0 to 10 above the calculated frequency corresponding to the set winding speed.

A cheese-like package with a ridge angle of 4.0° to 5.5°, which is specified in the present invention, can be obtained for the first time using the winding machine described above. That is, it has been impossible to obtain such a low edge angle package with good shape stability using a conventional winding machine equipped with a driven contact roll.

In the present invention, when using the above winding machine, it is necessary to wind the package at a contact pressure of 3 Kf or less per package. When the contact pressure exceeds 3 Kft per package, no matter how precisely the rotation speed of the self-driven contact roll is controlled, it is difficult to simultaneously solve both the package winding stability and yarn quality unevenness.

The present invention uses a combination of the winding method and the edge angle as described above to stabilize the winding shape and reduce the dry heat shrinkage stress in the yarn length direction of the yarn, including the yarn at the selvage portion and the yarn at other portions. The price difference is 40
We succeeded in obtaining a cheese-like package with uniform thread quality of less than 1/d.

Furthermore, with the present invention, it is possible to realize low contact pressure winding of 2 to 2 or less per package, which was thought to be impossible with high-speed winding, and the dry heat shrinkage stress value difference can be reduced to 2011 F/2.
We were able to achieve this below d.

The cheese-like package of the present invention can obtain good quality by directly applying the yarn to a knitted fabric.

According to the findings of the present inventors, ■Due to the effect of the self-driven contact roll, there is no transmission of drive energy at the contact area between the package and the contact roll, suppressing heat generation and stress generation, and causing contact during winding. There is no change in the shape or fiber quality of the part pressed by the roll.

(2) In addition, the yarns laminated at the package edge angles are easily relaxed at both ends after winding, and further uniformity is achieved.

This is the first time that a package has the dry heat shrinkage stress difference determined by the present invention, and it is presumed that the occurrence of "sink marks" can be eliminated.

〔Example〕

Hereinafter, the present invention will be explained in more detail with reference to Examples. In addition, in the present invention, the evaluation method of each characteristic value used is as follows.

<Dry heat shrinkage stress value difference> Using a thermal stress measuring instrument KE-2 manufactured by Sobo Engineering Co., Ltd., the sample length was 10a++, an initial load of 10 W/d was applied, and the heating rate was [15°C/min]. The temperature was raised to draw a dry heat shrinkage stress curve. The maximum value of this curve (the value obtained by dividing the read value by the sample denier x 2) was taken as the dry heat shrinkage stress value (P town/d ).

The difference in dry heat shrinkage stress value in the yarn length direction is
Make sure to measure the high part of the selvage, and measure at several points in the l traverse (from one end to the other end) direction (e.g., 7 to 8 if the l traverse yarn length is about 1.5 ff!) Measure the thermal stress value of the point).

This measurement was carried out for 5 traverses. Based on the obtained measurement results, the average value of the dry heat shrinkage stress value at the ear height is P, IIF/
d, among the measured values other than the height of the ear, extract the same number of values as the height of the ear from the smallest value and find the average value F, ff1
f/d.

The dry heat shrinkage stress value difference in the yarn length direction was determined using the following formula.

Dry heat shrinkage stress value difference (8F) = p, -F, (q/d
) Winding shape> The bulge shown in FIG. 4 is expressed as a bulge ratio (a).

a Bulge ratio (a) = -X 100 A -2a The bulge ratio (a) must be 10- or less and 5
− or less is good.

<Display of latitude "sink mark") The defect level of latitude "sink mark" is categorized into 4 levels, W = 0-1
W=o: No sink mark at all, W=1=Extremely minute sink mark, W=2: Sink mark, W=3: Strong sink mark, Example 11 Comparative Example 1 Very ffl viscosity [da]= Polyethylene terephthalate of o, s8 is melt-spun at 295°C, and after cooling, all the filaments are collected and lubricated at a position 1551 below the thinning completion point, without being stretched (7000 m as a 75d/36f yarn).
The product was wound up using a winding machine at a speed of 100 min. to obtain a cheese-like package with a winding amount of 10 K4. The physical properties of the yarn are breaking strength 4
．． It had an elongation of 1 t/d and an elongation of 4 degrees.

When winding, a spindle-driven winding machine equipped with a self-driven contact roll shown in Fig. 2 is used, and the contact pressure per package is constant at 2Kt, and the edge angle of the yarn to be laminated on the package is shown in Table 1. Different packages were obtained as shown.

Other conditions in this example are as follows.

Bobbin outer diameter: 140m - Traverse stroke: 160■ Take-up tension 0. ! Of/d control method of self-driving contact roll: circumferential speed control method, then
From these packages, the entire amount of yarn is directly supplied to a daily water jet loom (LW-51 type) K for weaving, with a warp density of 100 yarns/1n1 and a weft density of 80 yarns/in.
It was made into a plain woven fabric with a standard of . After scouring and presetting, this plain woven gray fabric was dyed at 130°C, and the quality of weft "sink marks" was determined.

Table 1 K shows the bulge ratio (a%), which is a characteristic feature of the shape of a 10 kg package, and the difference in heat shrinkage stress value (ΔF) of the surface layer.
, indicates the corresponding textile quality.

As is clear from Table 1, the cheese-like package obtained by the present invention has good winding shape stability and can be used directly on the weft of textiles to obtain good quality. Met.

Comparative Example 2 When performing the same spinning and winding as in Example 1, a spindle-driven winding machine equipped with a conventional driven contact roll that does not have self-driving force was used to reduce the edge angle 5.
Attempts were made to wind up samples of 4° and 4.6°, but the shape collapsed during winding, and a package could not be obtained.

Edge angle 6. The package wound at f is large in dry heat shrinkage stress value difference of 54'F/d, and the quality of the fabric is ``sink'' in the weft.
It was extremely poor with W=3.

Example 2 Winding was carried out under the same conditions as in Example 1, except that the edge angle was kept constant at 5.0° and the contact pressure during winding was varied as shown in Table 2, and the quality of the fabric was examined.

Below is the margin: Table 2 From Table 2, it is clear that the contact pressure per package is
A package obtained with a t34 or less and a roughness of 2KF or less has a good winding shape and fabric quality.

Example 3 Polyhexamethylene adipamide with a relative viscosity (VR) of 40 measured at a polymer concentration of 8.4 wt.
Winding was carried out at a speed of 4od/13f shown in Table 3 to obtain a cheese-like package with 8 sub-rolls. For winding, a winder equipped with a self-driven contact roll shown in FIG. 2 was used, and the winding was carried out at a ridge angle of 4.8° with a constant contact pressure tlKf per package.

From the obtained package, normal polyhexamethylene adipamide yarn was used as the warp, and the polyhexamethylene adipamide yarn wound by the above winding method was used directly from the package as the busy weft, and the weft density was 110. A plain woven fabric was fabricated in the same manner as in Example 1 except that the width was set to /in. Zo after scouring and presetting.

Table 3 shows the weft "sink mark" quality of fabrics dyed at ℃.

As is clear from Table 3, the cheese-like package obtained by the present invention was a fabric of good quality after weaving.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the edge angles of yarns laminated on a package, FIG. 2 is an example diagram of a winding machine used for manufacturing the package of the present invention, and FIG. FIG. FIG. 4 is a sectional view showing an example of the shape of the package. Patent applicant Asahi Kaho Kogyo Co., Ltd. Figure 1 Figure 3 Figure 4

Claims (1)

[Claims] 1. It is made by laminating substantially untwisted synthetic fiber yarns with a breaking elongation of 90% or less, the ridge angle of the yarns is 4.0° to 5.5°, and the yarns at the high end of the selvage Cheese-like package 2 of thermoplastic synthetic fiber yarn, characterized in that the dry heat shrinkage stress value difference in the yarn length direction of the yarn including the yarn of other parts is 40 mg/d or less, When winding a cheese-like package with a bobbin shaft-driven winder at a speed of 4000 m/min or more, a winder with self-driven contact rolls is used, and the winding edge angle is set at 4.0° to 5.5°. , and 3Kg/
A method for winding thermoplastic synthetic fiber yarn characterized by winding it with a contact pressure equal to or lower than that of the package.