JPH08209477A - Composite false twisted low-frequency slub yarn and its production - Google Patents

Abstract

PURPOSE: To obtain a composite false twisted low-frequency slub yarn without causing the slipping off or slub collapse by winding a sheath yarn around a core yarn containing an acetate yarn and alternately forming slub parts and midway parts in the longitudinal direction. CONSTITUTION: This composite false twisted low-frequency stub yarn is obtained by reciprocating a doubling point X between guides 4 and 7 with a guide 5 as a fulcrum when overfeeding a core yarn A relatively to a core yarn B in a process for instantaneously and regularly or irregularly varying the feed rate of the core yarns A comprising a triacetate yarn through the first feed rollers 1 controllable with a computer, feeding the core yarn A, on the other hand, regulating the feed rate of the core yarn B comprising a cation-dyeable polyester yarn through a magnet tensor 2 and doubling the core yarns through guides 4 and 5 at the doubling point X, forming slub parts triply wound around the core yarn B, feeding a sheath yarn C of a trlacetate yarn in an overfed state to the core yarns A and B having the intermittent stub parts during the time, heat-setting the false twist with a heater 9 and a spindle 10 while singly, triply and alternately winding the sheath yarn around the core yarns A and B and winding the resultant yarn through delivery rollers 11 and the second heater 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved composite false twist low frequency slab yarn and a method for producing the same.

[0002]

2. Description of the Related Art Conventionally, a composite false twist slab in which a slab portion in which a sheath yarn is wound in three layers around a core yarn and a midway portion in which a sheath yarn is wound alternately exist along the longitudinal direction of the yarn. The thread is Japanese Patent Publication No. 45-28018 and Japanese Patent Publication No. 47-49459.
Japanese Unexamined Patent Publication No. 61-102444 discloses a method for forming a random slab at low frequency by varying the amount of sheath yarn supplied. Slab yarn is provided for various purposes such as clothing and materials.

[0003]

However, the composite false twist low frequency slab yarn obtained by the above-mentioned conventional method causes yarn cracks in the middle of the road due to yarn friction at the time of the post-process, causing slab collapse. A twisting process with other yarns was required to improve the properties and morphological stability. An object of the present invention is to provide a composite false twist low-frequency slab yarn having a spindle-shaped slab having a good slab shape retention property intermittently and having an excellent surface effect and feeling, and a method for producing the same.

[0004]

[Means for Solving the Problems] The above problem is that the core yarn is composed of two or more yarns including an acetate yarn, and a slab portion in which a sheath yarn is triple wound around the core yarn and a single slab portion. In a compound false-twisted slab yarn in which the winding part and the middle part of the winding are alternately present along the longitudinal direction of the yarn, one core yarn is intermittently wound around the other core yarn in triple layers. Low-frequency false-twisted slab yarn characterized by forming a slab by a slab, and one of two or more core yarns including an acetate yarn in the twisting region of the false-twisting process. By temporarily or irregularly varying the supply amount of the strip, the yarn is intermittently wound around the other core yarn, and further, the sheath yarn is supplied to the core yarn in an overfeed state, When the false twisting process is performed while winding the sheath yarn around the core yarn, the false twisting temperature is 110 ° C or higher, and the sheath yarn overfill The de of 30% or more, and the number of false twisting ^{(20000~40000) / D 1/2 (T} / M)
This is solved by a method for producing a composite false twist low frequency slab yarn, characterized in that [D is the total denier of the yarn used].

First, the composite false twist low frequency slab yarn of the present invention will be described. In the middle of the composite false twist low frequency slab yarn of the present invention, the core yarn is composed of two or more yarns. As a result, in addition to the opening and entanglement of the core yarn and the sheath yarn, an untwisted portion is formed in the core yarn even in the midway portion of the core yarn due to the entanglement of the core yarns, and there is no slippage or slab collapse in the midway portion. False twist Low frequency slab yarn. Further, in the intermittently formed slab portion, one of the two or more core yarns is wound around the other core yarn in a single or triple winding, and the core yarns are wound in the same manner as the slab portion in the middle. The untwisted portion is generated due to the entanglement of the yarn to form the slab portion, and the sheath yarn is wound around the slab portion.

The core thread used in the present invention other than the acetate thread and the sheath thread are not particularly limited, and synthetic fibers such as polyester / polyamide / polyacrylonitrile, semi-synthetic fibers such as acetate, rayon, etc. Commonly used compounded synthetic long fibers such as recycled fibers and special long fibers such as different fineness yarn, different shrinkage yarn, partially oriented yarn, high stress and high shrinkage yarn, cationic dyeable yarn, extra fine yarn, multi-component yarn, etc. Alternatively, by using various fibers such as these composite yarns, more complicated forms and color tone expressions are possible. The present invention is particularly characterized in that the core yarn contains an acetate yarn, which makes it possible to obtain a composite false-twist low-frequency slab yarn having a natural and dry feeling and a silk-noil-like slab portion. .

Next, a method of manufacturing the composite false twist low frequency slab yarn of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing an example of an apparatus used for carrying out the present invention. The yarn A is combined with the computer-controllable first feed roller 1, and the core yarn B is combined at the combining point X via the supply guides 5 and 4 while the supply amount is adjusted by the magnet tensor 2. At this time, the core yarn B is constantly supplied by the magnet tensor 2, whereas the supply amount of the core yarn A is instantaneously regularly or irregularly changed by the computer-controllable first feed roller 1 to When the yarn B is in the overfeed state, the combined yarn point X reciprocates between the supply guides 4 and 7 with the supply guide 5 as a fulcrum to form a triple slab portion around the core yarn B. . The sheath yarn C is supplied from the second feed roller 3 to the core yarns A and B having the slab portion intermittently in an overfeed state, and reciprocates between the supply guides 7 and 8 with the supply guide 6 as a fulcrum, It is supplied to the contact-type first heater 9 while being wound around A and B alternately in single and triple layers. Then, it is twisted and heat-fixed by the first heater 9 and the spindle 10, but since the slab portion is firmly fixed by the triple winding structure, it remains ununtwisted in a converged state. The composite false-twist low-frequency slab yarn thus obtained is taken up by the first delivery roller 11, then passed through the second heater 12 to fix the yarn form, and then the second delivery roller 13 and the winding guide. It is taken up by the take-up roller 17 via 14, 15, and 16.

The false twisting temperature (the temperature of the first heater 9) in the above process must be 110 ° C. or higher. If the false twisting temperature is less than 110 ° C, the heat setting property is poor and the slab stability is poor. Further, in order to obtain a slab portion having a triple wound structure in the sheath yarn, the overfeed rate of the sheath yarn needs to be 30% or more, and if it is less than 30%, the slab cannot be formed. In addition, when it is 140% or more, there are too many sheath yarns and the yarns are easily broken, which is not preferable.

Further, the false twist number is set to (2000 to 4000).
By setting 0) / D ^1/2 (T / M), the composite false twist low frequency slab yarn of the present invention can be stably obtained. 20000 / D
^If it is less than ^1/2 (T / M), the texture is soft and the bundle is not bundled, and if it exceeds 40,000 / D ^1/2 (T / M), yarn breakage tends to occur.

Further, a slab portion having a triple winding structure is formed by overfeeding one of the two or more core yarns with respect to the other core yarns. In the present invention,
In order to form this slab part intermittently and at low frequency, it is characterized in that the supply amount of the overfeeding core yarn is instantaneously changed regularly or irregularly by computer control, etc. In order to obtain a high slab portion, when the overfeeding core yarn is not overfeeded, the compounding yarn angle θ formed with the other core yarn is 30 ° or more, and more preferably 55 to 65 °. It is preferable to set the distance between the supply guide and the yarn combining point to 3 to 40 cm.

FIG. 2 is a side view of the composite false twist low frequency slab yarn of the present invention, in which a is an intermittently formed slab portion, and one core yarn surrounds another core yarn. The state in which the sheath yarn is further wound around the portion in the state of triple winding is shown in FIG. Further, b is the middle part, in which the a is a single winding part, the b is a part in which one core yarn is wound around other core yarns in a triple manner, and the c is a core part. The portions that are over-untwisted and are wound around the outer peripheral portion of the sheath yarn in a wall-twisted shape are shown.

Hereinafter, the present invention will be described more specifically by way of examples.

【Example】

[Example 1] In the false twisting process using the false twisting machine shown in Fig. 1, a cationic dyeable polyester yarn (semi-dull 75d / 24f) is used as the core yarn B, and a core whose supply amount is varied. Regular triacetate yarn (Bright 150d / 40f) is used for yarn A, and triacetate regular yarn (Bright 35d / 9f) is used for sheath yarn C. False twist number 1800T / M (Z twist), magnet tensor Tension of 2 (tensor exit side) 7 g / Y, computer controllable first feed roller 1 has an overfeed rate of 15% for 10 sec, an overfeed rate of 100% for 0.4 sec. The rise delay time and fall delay time of 5 msec, the distance between the guide 5 and the yarn interlocking point X is 35 cm, and the second feed roller 3 is overloaded. Feed rate of 100%, the distance between the core yarn in the false twisting passing guide 6 and guide 7, 8 30
cm, the temperature of the first heater 9 is 170 ° C., the speed of the first delivery roller 11 is 70 m / min, and the temperature of the second heater 12 is 20
When the conditions were set at 0 ° C and the overfeed rate of the second delivery roller 13 was 8%, it was used as one of the core yarns in one place in the midway part of about 11 m having a single winding part and a triple winding part. 1 to 8 cm of slab of acetate yarn
The pattern having three yarns was repeated, and as shown in Table 1, a composite false twist low-frequency slab yarn having excellent yarn gathering properties and process passability was obtained. Using this composite false-twisted low-frequency slab yarn as a woven fabric, it has a sharpness peculiar to the slab-like compound false-twisted yarn in the middle of the road and the natural feel and dryness of acetate, and it has a low frequency of kasuri-tone. A woven fabric having a slab pattern was obtained.

[Examples 2 to 5, Comparative Examples 1 to 4] Example 1
Table 1 shows the results of examination by changing the false twist number, the first heater temperature, and the sheath yarn overfeed rate in accordance with the above.

[Example 6] Example 1 except that polyester regular yarn (semi-dull 30d / 12f) was used as the sheath yarn.
As a result of false twisting under the same conditions as described above, a composite false twist low frequency slab yarn having a tighter slab portion than the composite false twist low frequency slab yarn obtained in Example 1 was obtained. When a woven fabric was formed by using this composite false-twist low-frequency slab yarn for the background, Example 1
A fabric having a sharper feeling and a repulsiveness than that of the case was obtained.

[Embodiment 7] The distance between the guide 5 and the compounding point X is 25 cm, and the distance between the guide 6 and the core yarn passing through the guides 7 and 8 during false twisting is 15 cm. One feed roller 1 overfeed rate is 1
As a result of performing false twisting under the same conditions as in Example 1, except that the time for setting 5% is 10 to 12 sec and the time for setting the overfeed rate to 100% is 0.2 to 0.4 sec,
A pattern having 3 to 5 slabs of about 0.5 to 6 cm of acetate yarn used as one of the core yarns is provided at one place in the midway portion of about 11 to 14 m having a single winding part and a triple winding part. Repeated false false twist low frequency slab yarns were obtained.
When a fabric was formed using this composite false-twist low-frequency slab yarn, a woven fabric with a rich surface feeling, in which the petite slab and the long slab were mixed, was obtained.

[Comparative Example 5] A polyester stretched yarn (semi-dull 150d / 96f) was used as the yarn A for varying the supply amount.
As a result of carrying out false twisting under the same conditions as in Example 1 except that the sheath yarn was not inserted, there was no tightening in the middle of the road, and slabs were rugged.

[0018]

[Table 1]

[0019]

The composite false twist low-frequency slab yarn of the present invention has the core yarn composed of two or more yarns. Therefore, in addition to the open and interlacing of the core yarn and the sheath yarn, The untwisted portion is formed in the core yarn even in the midway portion due to the entanglement of the constituent fibers, and the composite false twist low-frequency slab yarn is formed without slippage and slab collapse in the midway portion. Also, since one core yarn is wound around the other core yarn in triples at an arbitrary frequency to form the slab portion,
It is possible to obtain a woven or knitted fabric rich in natural feeling and dry feeling because it has a richer surface feeling than the conventional false twisted low-frequency slab yarn and further uses an acetate yarn as at least a part of the core yarn. .

[Brief description of drawings]

FIG. 1 is a side view showing an example of an apparatus used for producing a composite false twist low frequency slab yarn of the present invention.

FIG. 2 is a partial side view of the composite false twist low frequency slab yarn of the present invention.

[Explanation of symbols]

 1 Computer Controllable First Feed Roller 2 Magnet Tensor 3 Second Feed Roller 4, 5, 6, 7, 8 Supply Guide 9 First Heater 10 Spindle 11 First Delivery Roller 12 Second Heater 13 Second Delivery Roller 14, 15, 16 Take-up guide 17 Take-up roller A Core yarn (variation of supply amount) B Core yarn (constant amount of supply) C Sheath yarn X Combined yarn point θ Combined yarn angle a Intermittently formed slab part b Road Central part b Single winding part b Triple winding part c Wall twist part

Claims (2)

[Claims] 1. A core yarn is composed of two or more yarns including an acetate yarn, and a slab portion in which a sheath yarn is wound in triple and a midway portion in which a sheath yarn is wound around the core yarn. In a composite false twist slab yarn that alternates along the longitudinal direction of the yarn, one core yarn is intermittently wound around the other core yarn in triple layers to form a slab. Composite low-frequency false twist slab yarn characterized by: 2. In the twisting area of the false twisting process, the supply amount of one yarn of two or more core yarns including acetate yarn is instantaneously changed regularly or irregularly. By doing so, the core yarn is intermittently wound around another core yarn, and further, the sheath yarn is supplied in an overfeed state with respect to the core yarn to perform false twisting while winding the sheath yarn around the core yarn. At that time, the false twisting temperature is 110 ° C or higher, and the sheath yarn overfeed rate is 30.
% Or more, and the false twist number is (20,000 to 40,000) /
A method for producing a composite false twist low frequency slab yarn, wherein D ^1/2 (T / M) [D is the total denier of the yarn used] is set.