JPS5936005B2 - Method for manufacturing bulky processed yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to an efficient, low-cost method for producing bulky textured yarns having excellent yarn properties.

In general, it is desirable that twisted threads have homogeneous properties, and for producing bulky textured yarns with special textures, for example, a method of doubling twisted threads with different processing conditions. It has been known.

However, this processing method requires two temporary twisting devices, which increases the overall size of the temporary twisting machine and increases the overall size of the temporary twisting device.
There was a problem in that the process became complicated and the cost t)5 increased.

In order to produce a bulky textured yarn with a special texture, the present inventors investigated a method of doubling textured yarns with different degrees of heat-setting during rolling processing, and found that the crimp characteristics It was confirmed that it can be easily changed.

- The inventors have made the temporary twisting machine more compact and 1
In order to improve efficiency, we investigated a friction disk type temporary twisting device, and as a result, we completed a 5-axis external friction temporary twisting device.

The 5-axis circumscribed plate twisting device has an assembly point 1 of three friction disks.
Because the thread can be threaded through it, two threads can be processed simultaneously and independently, and the feature is that it is significantly more compact than the conventional three-axis friction disk temporary twisting device. be.

The present invention focuses on the effect that the heat setting temperature during the temporary twisting process has on the crimp characteristics, and applies this to the novel 5-axis external friction temporary twisting device. It is something that was given.

That is, in the present invention, at least one friction disk b3 can be attached and out of five axes rotating in the same direction, four form the four vertices of a quadrilateral, and the other one forms the four vertices of the quadrilateral. A total of two sets of three axes are arranged, each consisting of an axis placed within the quadrilateral and two axes placed at two adjacent vertices. For each set of axes in the axis group, from any one axis, the adjacent axis f is successively clockwise or counterclockwise in a spiral staircase pattern.
Overlapping the friction disks in pairs, and 2
A 5-axis circumscribed friction type consisting of an L unit in which both shaft groups are installed in the same direction as the helical direction of the order of the friction disks in contact with the yarn and the rotating direction of the friction disks as seen from the yarn traveling direction. Set up one temporary twisting machine equipped with one temporary twisting device for each weight,
A heat treatment device for fixing one twist per 1 weight is provided, and the temperature of the heat treatment device is set to be changed alternately for each weight, and the three axes are made into one set in one unit. A total of two yarns, one yarn each, are fed to a total of two shaft groups, and each unit is temporarily twisted while fixing the twist in the one heat treatment device, and the two yarns are temporarily twisted in each unit. This is a method in which 1 yarn of a yarn is combined with 1 yarn that has been pre-twisted in an adjacent weight unit, and wound as substantially one bulky yarn for each weight.

The present invention will be described in detail below with reference to the drawings.

FIG. 1 is a side view showing a main part of an example of a five-axis circumscribed friction temporary twisting device made of one unit used in the present invention, and FIG. 2 is a plan view thereof.

Rotatably supported axes A, B, D,
E is placed at each vertex of the quadrilateral, and axis C is placed within the quadrilateral.

Each shaft has two friction disks (al.

a υ b 1 , b2jc11c2jdll
d2 tett C2) is attached to form an l-unit temporary twisting device.

Furthermore, these friction disks are connected to a pair of adjacent axis groups C2D and E.
, J When you get used to it, e1 → d, → c, → e1 → d2 c2
They are stacked in a clockwise direction in the form of a spiral staircase, overlapping each other in this order.

Similarly, for another set of axes A, B, and C, b1 → c1 → a1
→ b2 → c2 → a2 are stacked in the clockwise direction in a spiral staircase pattern so that they overlap.

That is, two adjacent sets of A, B, C$ and C
In the axes group consisting of three axes 2D and E, each friction disk is attached so that its position becomes higher in the clockwise direction.

In the temporary twisting device shown in FIGS. 1 and 2, when the five axes are rotated l in the counterclockwise direction (arrow in the figure), the yarn Y1 first comes into contact with the friction disk c21, then d2. C2! This sebutsu again c
It is subjected to frictional twisting in the order of 1 7 d'l t el and heated in the Z direction, resulting in a twisted yarn having a torque in the Z direction.

Similarly, the yarn Y2 is connected to the friction disk a2. c2. b2. a1. c.
1. It is heated in the Z direction in contact with bl and becomes a temporarily twisted yarn having a torque in the Z direction.

FIG. 3 is a plan view showing the main parts of another example of a five-axis circumscribed friction temporary twisting device in which the way the friction disks are assembled is changed.

In this device, a friction disk is connected to a pair of adjacent cars.
, D, Elko d1 → e, → c1 → d2 → e2 →, c2 are installed in the counterclockwise direction in a spiral stepwise manner so as to overlap each other. ing.

In addition, another set of adjacent axes A, B, and C1 are arranged in a spiral staircase shape in the counterclockwise direction so as to overlap each other in the order of a1 → c1 → b1 → a2 → c2 → b2. One piece is installed so that it becomes higher in sequence.

When each axis of the five-axis temporary twisting device equipped with a friction disk is rotated clockwise (arrow in the figure) as shown in FIG. e2. d2゜C1, el,
It contacts in the order of dl and is temporarily twisted by friction, and is heated in the S direction to become a temporarily twisted yarn having a torque in the S direction.

Similarly, the yarn Y2 is a friction disk b2 t C2a2. bl,
Cl and al contact in this order and are heated in the S direction, resulting in a temporarily twisted yarn having a torque in the S direction.

The material constituting the contact surface of the friction disk may be rubber-based (urethane rubber, etc.), non-rubber-based (ceramic material, etc.), or the like.

Next, the present invention will be described with reference to FIG. 4, in which a bulky textured yarn is manufactured using a temporary twisting machine equipped with a five-axis circumscribed friction temporary twisting device consisting of one unit for each spindle.

FIG. 4 is a drawing showing the overall configuration of -fU of the apparatus for implementing the present invention, in which the yarn pulled out from the yarn packages 1, 1 is
A set of two threads per spindle is supplied as 6, 7, 8, and 9 from delivery rollers 2 and 2'.

These yarns are temporarily twisted by a five-axis external friction temporary twisting device 5, 5', and the twist is fixed by a contact type heating plate which is a heat treatment device 3, 3' for fixing the twist. Ru.

Here, the series of processes that constitute the temporary twisting machine, from the delivery roller to the heat treatment device for fixing the twist, the external friction temporary twisting device, and the winding device, is referred to as a weight.

In the present invention, it is necessary to provide one heat treatment device 3° 3' for each weight to fix the twist, and to set a different temperature t for each weight alternately.

Note that 4 and 4' are presser pins for bringing the yarn into sufficient contact with one heating plate for twist fixing, and 10 is a guide.

The yarns 6, 7, 8, and 9 that have been given temporary twists are combined with adjacent yarns that have been processed at different temporary twist fixing temperatures with different weights.

That is, the yarn 7 is interlaced with the yarn 8 of the adjacent weight, similarly, the first yarn 6 is interlaced with the yarn of the adjacent weight on the left side, as shown by the dotted line, and the yarn 9 is interlaced with the yarn of the adjacent weight on the right side. The threads are combined with the threads indicated by the dotted lines.

In order to obtain the desired yarn form and physical properties, the yarns thus doubled are passed through a single yarn interlacing device 13 and a heat treatment device 14, and are then processed into a winding device 16, where the threads are divided into substantially one fiber per spindle (l unit). It is wound up as processed yarn.

In addition, 11 is the focusing guide 12, 2nd O-ra, 15
is the 3rd roller.

Fig. 4 5-axis external friction temporary twisting device with 1 core is 5 degrees.
The rotating direction of the friction disk and the order of the attachment of the disk to the 5 axes may be set in the reverse order so as to give temporary twists in opposite directions (S twist and Z twist 9). However, it may be set to give one temporary twist (S twist or Z twist) in the same direction.

When a plurality of spindles are arranged in Fig. 4, one of the two yarns to be temporarily twisted by the leftmost and rightmost weights has no other yarn to be twisted, and the number of spindles is The relationship between U and the number of winding devices n is n = U-1, but in this case, this does not impede the requirement that it is substantially possible to wind up l yarn after doubling per spindle.

In addition, in the present invention, the total yarn fineness (D) and the number of filaments N
It is more preferable that the space between 1 and 2 satisfies the following conditions.

D≧100 N≧30 By performing temporary twisting once within the range that satisfies the above conditions, the occurrence of fluff can be significantly reduced and a yarn with good crimp properties can be obtained.

The more detailed implementation conditions of the present invention, the fibers that can be processed, etc. are as follows: hSl This is not limited to only one.

The yarns that can be applied and their combinations are yarns made of thermoplastic polymers such as polyamides, polyesters, polyacrylics, and polyolefins.

In this case, the combination of two yarns to be combined is not only a combination of yarns with the same polymer and the same characteristics, but also a combination of two yarns with different characteristics such as polymer cross-sectional shape, dyeability, intrinsic viscosity, degree of orientation, etc. is also possible.

(l) Applicable yarn forms and implementation methods (a) The drawn yarn of the above-mentioned thermoplastic synthetic fiber is tentatively twisted and then doubled using the apparatus and method described above.

After or simultaneously with the stretching of the undrawn yarn or pre-oriented yarn (highly oriented undrawn yarn; POY) of the thermoplastic synthetic fiber, the above-mentioned apparatus is used.
’ method is used to temporarily twist and then double the threads.

(Preferable than method h5 for the mouth step) (0) Particularly for the above-mentioned (I3i-mouth), it is preferable to carry out at a speed of 200 m7 minutes or more, preferably 300 m1 minutes or more.

Since the yarn before doubling can be processed with a low tenacity, it is suitable for high-speed processing from the viewpoint of heat setting effect.

(D) Temperature of the heat treatment device for fixing twist Set an arbitrary temperature difference according to the target yarn, but
A few examples will now be explained.

For example, when utilizing crimp characteristics or crimp form differences due to a difference l in heat setting temperature, it is effective to provide a difference of about to'c or more.

In addition, in the case of yarns made of different materials, for example, polyamide and polyester, a heat treatment temperature suitable for each yarn is set.

(E) Thread Doweling Method There are several ways of combining threads from adjacent spindles, as shown in FIG. 5, and any of them can be adopted.

(F) In order to improve the bundling property of the yarn obtained by piling two intertwined single yarns, the yarn after the interlacing is given one strand between the single yarns using a focusing means such as an air jet nozzle. This will have an even greater effect.

(Gl Heat Treatment After Pairing In order to reduce the stretchability and torque caused by crimp, it is even more effective to heat treat the yarn after plying.

Either one of the single yarn entanglement treatment and the heat treatment may be performed, or both may be performed.

Further, the order may be such that the single yarn entanglement treatment is performed and then the heat treatment is performed, or vice versa.

The present invention uses five external friction temporary twisting devices to simultaneously and independently process two yarns as a unit, while alternating the temperature of the twist fixing heat treatment device for each spindle. Then, one of the two yarns temporarily twisted in each weight unit is combined with one of the two yarns temporarily twisted in the adjacent unit, and the It is constructed so that it can be wound as one thread per spindle.It has a feature H5, which produces a filling effect.

First, using a 5-axis circumscribed friction temporary twisting device, one of the two yarns temporarily twisted by each weight unit is combined with the l yarn temporarily twisted by the adjacent weight unit. Regarding method 1, (1) Since the temporary twist of two yarns can be processed simultaneously with one temporary twist machine, there is no need to increase the distance between the weights of the temporary twist machine, and the temporary twist machine can be processed significantly. Compact 1 can be rubbed.

(2) Two pieces per yarn after doubling, as in the conventional method.

Since it is possible to temporarily twist two yarns with one device (1 unit) without requiring a heat treatment device for fixing the twist and a temporary twisting device, the equipment cost is low and production can be carried out at low cost.

(3) In general, the temporary twisted yarn processed by the conventional method has a fineness of
.

1) As the size increases, the insertion limit number decreases.
For this reason, the crimp of processed yarn with a large fineness must be coarse, but according to the present invention, for example, when two yarns of the same thickness are used, the crimp of the processed yarn is coarse. Since the yarn IJ b5 can be inserted at about half the fineness, excellent crimps of the processed yarn after doubling can be obtained with very fine crimps.

(4) High-speed processing becomes possible.

For example, in order to obtain a 150D temporary yarn, according to the present invention, it is sufficient to temporarily twist a 75D yarn and then double the two yarns.

Method 1 for processing 150DI yarn In comparison, 75D yarn has a smaller fineness, so heat is transferred quickly from a hot plate used as a heat treatment device for twist fixation, and heat fixation efficiency is high.

For this reason, when comparing the length of the hot plate and the temperature of the hot plate at a constant value, 75D allows higher speed.

Next, the temperature of the heat treatment equipment was alternately changed once per spindle,
When two yarns are combined using the above method, (1) If the two yarns have the same polymer and fineness, the processed yarn that has been pre-twisted in a high-temperature heat treatment device will be more crimped than the processed yarn that has been pre-twisted at a low temperature. There is a concern about the occurrence of crimp.

Therefore, when the two yarns are combined, a bulky textured yarn with extremely high bulkiness can be obtained.

(2) When combining two yarns with different melting points, for example, polyester yarn and polyamide yarn, each yarn I
By using a heat treatment device set at an appropriate temperature, it is possible to obtain a bulky textured yarn much more efficiently than with a conventional temporary twisting machine.

The effects of the present invention will be explained below using Example 1.

Example 1 A highly oriented undrawn polyethylene terephthalate yarn (Δn=31XI O-3) of 145D-36F was supplied to the temporary twisting machine shown in FIG. After performing S heating), the two yarns were combined, and then single yarn interlacing treatment was applied and the yarn was wound.

The obtained bulky textured yarn was a mixture of two yarns with different crimp forms and had good bundling properties.

As a result of knitting (circular knitting) and dyeing using the processed yarn, a very bulky knitted fabric was obtained.

Example 2 Same as Example 1, except that the heating direction was changed for each unit and the S twist and Z twist were combined, the single yarns were not intertwined, and the heat treatment device after the yarn combination was not used. A bulky textured yarn was obtained under the same conditions.

Although the obtained yarn had a slightly lower bundling property than the bulky textured yarn obtained in Example 1, there was no problem at all when knitting (circular knitting).

The bulky textured yarn had almost no apparent residual torque, and the knitted fabric using the yarn was extremely bulky and exhibited immersed characteristics with little twist in the stitches.

[Brief explanation of drawings]

Fig. 1 is a side view showing the essential parts of an example of a 5-axis circumscribed friction temporary twisting device used in the present invention, Fig. 2 is a plan view of the same, and Fig. 3 is a different one in which the friction disk assembly is changed. A plan view of a 5-axis external friction twisting device, FIG. 4 is a front view showing the overall configuration of an example of the device implementing the present invention, and FIG. 5 is an explanation of the method for doubling two yarns in 1ζ of the present invention. It is a diagram. A, B, C, D, E... Single axis, al, a
2. bl, b2゜C1j C2j ct12 d2 j
el 7 C2""" friction disk, 1゜1'...
・Package, 2, 2'... Delivery roller, 3
゜3'...Heat treatment equipment for twist fixing, 4,4'.
...Press pin, 5,5'...5-axis external friction temporary twisting device, 6゜7.8,9...Thread, 1
0...Guide, 11...Focusing guide,
12... 2nd roller, 13... Single yarn interlacing device, 14... Heat treatment device, 15...
...3rd roller, 16... Winding device.

Claims (1)

[Claims] 1 At least one friction disk can be attached to five axes rotating in the same direction, four of which form the four vertices of a quadrilateral, and the other one located within the quadrilateral. Of the two groups of axes, one set consists of three axes, each consisting of an axis placed within the quadrilateral and two axes placed at two adjacent vertices. In each set of shaft groups, move the friction disks one by one from one shaft to the adjacent shaft group (clockwise or counterclockwise in a spiral staircase pattern).
These overlap, and both sets of shafts are mounted in such a way that the helical direction of the order of the friction disks in contact with the yarn and the rotating direction of the friction disks are in the same direction when viewed from the direction in which the yarn travels. A temporary twisting machine is equipped with a 5-axis external friction temporary twisting device consisting of 1 units for each weight, and a heat treatment device for fixing one twist per 1 weight is installed, and the temperature of the heat treatment device is are set by alternating t for each weight, and in one unit, a total of 2 sets of axes, 1 set consisting of the above 3 axes, are created.
A total of two yarns of each set are fed, and each set is subjected to temporary twisting while fixing the twist in the one heat treatment device, and one of the two yarns subjected to temporary twisting is processed in each unit. A method for producing a bulky textured yarn, which comprises combining the yarn with one yarn temporarily twisted in an adjacent unit of weights, and winding the yarn as one bulky textured yarn per 1 spindle. .