JPH0978442A - Production of easily napped synthetic fiber fabric - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing an easily napped synthetic fiber fabric by which the napped synthetic fiber fabric can be produced even with a usual loom or a knitting machine without using any special device such as a pile loom or a pile knitting machine and napping can be carried out with a low frequency and with slight generation of unhairing. SOLUTION: This method for producing the objective easily napped synthetic fiber fabric comprises interlacing a continuous filament yarn of synthetic fibers having >=12 % boiling water shrinkage factor with a no-twist staple fiber bundle having a lower boiling water shrinkage factor than the continuous filament yarn by >=7% by an air nozzle, weaving or knitting the resultant long and short composite yarn by regulating either warp or weft to <=950 cover factor or at a low density of <=0.52, heat-treating the resultant fabric under relaxed conditions, manifesting a heat-shrinkage difference between staple and continuous fibers and nap-processing the resultant bulky fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing an easily raised synthetic fiber fabric which can be easily raised.

[0002]

2. Description of the Related Art In the conventional method for producing a napped synthetic fabric, a pile loom or a pile knitting machine is used to raise the fibers to be raised as pile yarns on the surface of the fabric and raise them. Therefore, it cannot be manufactured without such a special loom or knitting machine. In addition, synthetic fibers such as short fibers and long fibers are used as pile yarns.However, since synthetic fibers generally have higher strength and elongation than natural fibers, they can be said to float in piles even though they are floated. There is a problem that it is difficult to process and sufficient brushing cannot be obtained unless brushing is repeated many times. In particular, spun yarn has a real twist, so
It was difficult to raise the hair because the fiber bundles were converged. In addition, the pile yarn and the ground yarn are bonded only by the structure of the woven or knitted fabric,
Since there is no binding due to entanglement, twisting, adhesion, etc., there are drawbacks such as the entire pile yarn falling out of the base fabric of the ground yarn during the raising process or after the raising process, or the constituent single fibers of the pile yarn are easily removed. It was

[0003]

DISCLOSURE OF THE INVENTION The present invention is capable of producing a raised synthetic fiber fabric even with an ordinary loom or knitting machine without using a special device such as a pile loom or a pile knitting machine, and further, in a small number of times. It is intended to provide a method for manufacturing an easily raised synthetic fiber fabric which can be easily raised and which causes less hair loss.

[0004]

DISCLOSURE OF THE INVENTION The present invention relates to long fibers of synthetic fibers having a boiling water shrinkage of 12% or more, and short fiber bundles of synthetic fibers having a boiling water shrinkage of 7% or more less than that of twist. Are entangled with an air nozzle, and the long-short composite yarn thus obtained is woven or knitted at a low density with a warp or weft cover factor of 950 or less or 0.52 or less, and the fabric thus obtained is subjected to relaxation heat treatment. And producing a difference in heat shrinkage between the short fibers and the long fibers, and subjecting the bulky fabric thus obtained to a raising process, which is a method for producing an easily raised synthetic fiber fabric.

The long-short composite yarn is obtained by extending the long fibers a and b consisting of two kinds of synthetic fibers having different cutting elongations between two nip rollers at an intermediate expansion ratio between the two and only the fibers on the low elongation side. It is desirable to form it by drafting. Here, the expansion ratio (times) is a value defined by the following formula. Stretch magnification (times) = 1 + [(break elongation of a / 100) +
(Break elongation of b / 100)] / 2

Further, a long fiber bundle of synthetic fibers is chopped between two nip rollers, and long fibers having a boiling water shrinkage of 7% or more are aligned with the short fiber bundle thus obtained, and entangled with an air nozzle. It is desirable to form by doing.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a process diagram showing an example of a manufacturing process of a long-short composite yarn, and FIG. 2 is a view showing a yarn form in which a long-short composite yarn is treated with boiling water to exhibit a contraction difference between a long fiber and a short fiber.

[0008] Now, specifically explaining with an example using the manufacturing process shown in FIG. 1, a and b are long fibers of synthetic fibers having different cutting elongations, and these long fibers a and b are aligned. Stretching is performed between the supply roller 1 and the drafting roller 2 at a stretch ratio corresponding to an intermediate elongation between the cutting elongation of the long fibers a and the cutting elongation of the long fibers b, and only the long fibers b are shredded. The composite fiber d is obtained by entwining the long fiber a, which has been drawn only through the suction nozzle 4 and the air entanglement nozzle 5, as a core, and the short fiber b ′ obtained by cutting the long fiber b into a sheath. The take-out roller 3 takes it out and winds it around the winder 6.

In the obtained composite yarn d, the effect of the present invention cannot be obtained unless the difference in boiling water shrinkage between the short fibers b'and the long fibers a is at least 7% or more, preferably 10% or more. The greater the difference in shrinkage, the greater the floating of the sheath yarn when the fabric is subjected to the relaxation heat treatment, and when napped, the one with long hair legs is obtained. Therefore, regarding the difference in cutting elongation between the long fibers a and the long fibers b in order to obtain the difference in shrinkage, the manufacturing process of FIGS. 1, 3, and 4 and the degree of elongation of the long fibers a and b, etc. Although it depends on the above, about 20% or more is necessary in the case of FIG. The expansion ratio between the supply roller 1 and the drafting roller 2 is larger than the intermediate elongation of the cutting elongations of the long fibers a and b if possible, and the higher the expansion ratio close to the elongation of the long fibers a, the larger the difference in shrinkage. can do. However, if it is set too high, it may affect the running of the long fibers b during the drafting.
Since stretch-checking unevenness and yarn breakage are likely to occur, an extension ratio of 80% or less of the cutting elongation of the long fiber a is a standard.

In addition, the long fibers b are as low as possible OPU (oil agent application amount), within a range where electrostatic damage does not occur.
If possible, it should be 0.2% by weight or less, and the type of oil agent used should be one that has low tackiness and that entanglement and twisting should be eliminated as much as possible. Further, the suction nozzle 4 has a suction force and a swirling force so that the fibers are not wound around the drafting roller 2, and the air entanglement nozzle 5 may be either a swirling flow type or a turbulent flow type. , There are few loops and slacks so that the opening of the yarn is good when brushed,
It is preferable that the entanglement strength and the pitch are mild. For this purpose, it is also effective to set the relaxation rate of the traveling yarn between the drafting roller 2 and the take-out roller 3 to a low value of about 0 to 3% in addition to the type of nozzle and the reduction of the compressed air pressure.

Next, the composite yarn d thus obtained is untwisted or sweet-twisted and used for warp or weft, or both warp and weaving or knitting with an ordinary weaving machine. Next, shrinkage treatment is performed with boiling water or dry heat without applying tension as much as possible, and after that, raising treatment is performed to obtain a raising synthetic fiber fabric.

Here, the texture during weaving or knitting may be appropriately selected and set according to the heat shrinkage ratio of the composite yarn d and the intended use of the product, but the short fibers b'constituting the composite yarn. As shown in FIG. 2, in order to maximize the contraction difference between the long fiber a and the long fiber a and to obtain easily raised hair, in the case of a woven fabric, a cover factor of either warp or weft is 950 or less, and
In the case of knitting, it is necessary to make the density as low as 0.52 or less.
Depending on the use of the product, dyeing may be performed before the raising process, and shearing and various finishing processes may be appropriately performed.

On the other hand, in the example shown in FIG. 3, the continuous filament b of the synthetic fiber is stretched and stretched between the two nip rollers 1 and 2 at an elongation ratio larger than the cutting elongation of the continuous filament b, and thereby obtained. The short fiber b'has a boiling water shrinkage of 7
%, Preferably 10% or more, another long fiber a ′ is aligned at the entrance of the nip roller 2 and entangled and entangled with the suction nozzle 4 and the air entanglement nozzle 5 to obtain the composite yarn d.

Further, in the example shown in FIG. 4, the short fiber bundle c of synthetic fibers is finely drafted between the nip rollers 1 and 8 with the assistance of the draft roller 7, and the shrinkage rate of boiling water is 7% or more. The large filaments a'are aligned at the entrance of the nip roller 8, entangled and entangled with the air entanglement nozzle 5, and at the same time, the composite yarn d is wound around the pan e while applying a sweet twist of 10 to 300 T / M by the ring fuel yarn machine 9. Shows how to take.

Here, in the example of FIGS. 1 and 3,
The average fiber length of the chopped chopped fibers b ′ is preferably about 90 to 500 mm. For this purpose, the distance between the supply roller 1 and the chopped roller 2 greatly differs depending on the chopped stretch ratio, but 1
It is preferably about 00 to 800 mm. If the length is shorter than this, hair loss tends to increase, and the stretch-cutting tends to be non-uniform. If the length becomes longer, it naturally becomes closer to the filament, and hair raising tends to be difficult. Further, in FIG. 4, the twist number by the ring burner is preferably 10 to 300 T / M. That is, when the number of twists is small, the winding property of the ring tends to be unstable, and when the number of twists is large, the fibers are naturally bundled and the raising property is deteriorated. In addition, the method of FIG.
Since the long fiber a that is not stretched is contracted by elastic recovery between the stretch roller 2 and the take-out roller 3 after being stretched, the shrinkage of the short fiber and the long fiber is more than that of the method shown in FIGS. 3 and 4. There is an advantage that the difference can be increased and higher bulkiness can be obtained. In addition, in the method of FIG. 1 and FIG. 3 using the draft, if the low elongation filament b has a lower elongation and is heat set, the boiling water shrinkage ratio after the draft is greater. Not preferred.

[0016]

EXAMPLES The present invention will be described in more detail below with reference to examples. Example 1 Elongation 6 obtained by high speed spinning using a different denier cap
2%, 60 denier, 12 filament high elongation yarn a
And a polyester filament composed of a low elongation yarn b of 240 filaments having an elongation of 26%, 120 denier and 240 filaments.
Supplying device 1 and feeding roller 1
Between the high elongation yarn a and the low elongation yarn b at a stretch ratio of 1.39, which is an intermediate stretch ratio, and only the low elongation yarn b is 600 m / mi.
Then, the short fiber b ′ that has been drafted at a speed of n and then passed through the suction nozzle 4 and the air entanglement nozzle 5 is conjugated with the high elongation yarn a that has only been stretched, and a long and short composite of 134 denier and 210 filaments is combined. The thread d was obtained and wound on the winder 6.

It should be noted that the oil agent for the raw yarn to be supplied contains lauryl phosphate as a main component and has an excellent antistatic effect, and
Select a material with low tackiness, and attach it to 0.18% by weight.
I reduced it. Further, the tying property of the raw yarn was also untwisted and the interlace degree was lowered to 1 / m as much as possible. Further, the distance between the supply roller 1 and the drafting roller 2, the so-called drafting length, is 250 m.
set to m. At this time, the average fiber length of the chopped short fiber was 330 mm. Further, as the suction nozzle 4 and the air entanglement nozzle 5, swirl nozzles having swirl flows in opposite directions were used, and the relaxation rate between the drafting roller 2 and the take-out roller 3 was set to 2%. At this time, the long / short composite yarn d had a degree of entanglement of 43 / m and had a smooth yarn form with few fluffs and slack, but few loops and strong spot-like focusing portions. Further, when this yarn was laid and subjected to boiling water treatment in a free state, the long fibers shrank by 16.5%. One short fiber shrinks 7.8%, the difference is 8.7.
%Met.

Next, the long / short composite yarn 134de / 210
Filament [(core) 3.8 de / 12 filament,
(Sheath) 0.45 de / 198 filament],
300T / m S twist is applied, and all CFs are used as woven fabric design standards.
(Cover factor) 1,000 (W; 530, Latitude 4)
70), the ratio of warp to weft was woven into a flat design of 53:47 and treated in the dyeing process to give a total CF of 1,600 and a warp to weft ratio of 51:49. As this dyeing process, continuous refining → liquid flow relaxation → free set →
Dyeing → setting with a pin tenter → raising → shaving was performed, but in particular, by performing a free setting (generally using a shrink surfer) at 180 ° C. for 45 seconds,
The low heat-shrinkable short fibers were looped on the surface of the woven fabric, and many inter-fiber voids were formed in the fiber bundle, so that a fabric having high bulkiness was obtained. After that, napping was performed, but since it was extremely fine, it was possible to nap easily with half the number of times of conventional napping, and a soft and high-quality product having good repulsion was obtained.

Example 2 Polyester having a total denier of 150 de, a filament number of 144, an elongation of 32%, a titanium oxide content of 0.5% by weight, an oil agent adhesion amount of 0.2% by weight, untwisted, and an interlace degree of 2 / m. The synthetic fiber bundle b obtained by bundling 15 filaments under uniform tension is fed to the device shown in FIG. 3, and stretched 18 times between the feeding roller 1 and the drafting roller 2,
Check off at a speed of 400 m / min to get all denier 125
A fiber bundle having a de, a number of filaments of 145, and a boiling water shrinkage of 7.4% was obtained. A highly shrinkable polyester filament a copolymerized with isophthalic acid having a total denier of 75 de, a number of filaments of 12 and a boiling water shrinkage of 28% was inserted from the draft roller 2 and aligned, and the suction nozzle 4 and the air entanglement nozzle 5 And long and short composite yarn d was obtained. The draft length at this time was 450 mm, and the average fiber length of the draft short fibers was 18 mm.
7 mm, the total denier of the obtained long and short composite yarn is 203 d
e, the shrinkage rate of boiling water was 25%, and the yarn unevenness U% by the ignestester was 8.8%. A swirling air nozzle is used for both the suction nozzle 4 and the air entanglement nozzle 5, and the relaxation rate of the yarn by the drafting roller 2 and the take-out roller 3 is 3%.
The degree of entanglement at this time was 53 pcs / m.

Next, the long / short composite yarn 203de / 157
Filament [(core) 6.3 de / 12 filament,
(Sheath) 0.9de / 145 filament), 200T
/ M S twist, and the total CF of the woven fabric is 1,800 (warp; 9
00, weft; 900), and a satin weave with a warp to weft ratio of 50:50, and processed in substantially the same processing step as in Example 1. At this time, the free set of Example 1 was partially set by a pin tenter. Change to 180 ℃, 45 seconds, after that,
The fabric is soaked in a 3.5 wt% alkaline solution and the weight is reduced, the total CF of the fabric is 2,300, and the ratio of warp to weft is 5
By finishing at 7:43, the same bulky fabric as in Example 1 was obtained. Moreover, the strength of the low shrinkage short fibers is deteriorated by applying a weight reduction treatment to this woven fabric,
It is possible to nap easily with a much smaller number of naps than before, and a soft and bulky napped product was obtained.

Here, for the calculation of the cover factor, the following equation is simply used. Woven cover factor = number of threads per inch width x
√ (Yarn denier) Knit cover factor = √ (Yarn denier) / [89
× Stitch loop length (mm)] Further, the average fiber length of the chopped short staple fibers is obtained by pulling out 150 yarns at arbitrary positions by pulling out 150 sampled yarns without cutting the conjugation nozzle in the manufacturing process so as not to cut the constituent single fibers. Then, the average value was calculated. Furthermore, the interlace degree of the supply raw yarn and the entanglement degree of the long / short composite yarn are 0.1 g /
With the tension of de applied, the needle is pierced with a force of 0.05 g / de and the length of the yarn is gently squeezed and the number of times of catching per meter is measured 5 times at any position and the average value is calculated. did.

[0022]

As described above, according to the present invention, a brushed synthetic fiber fabric can be obtained by using an ordinary loom or a knitting machine without a special pile loom or a pile knitting machine. Since only the short fiber component of the composite yarn consisting of fibers and long fibers is raised, the core yarn, which is a part of the raised yarn, remains in the base fabric, and the raised yarn is entangled with the short fibers and long fibers and restrained by the fabric structure. Therefore, a raised synthetic fiber fabric with less hair loss can be obtained. In addition, since the synthetic fibers to be raised are short fibers and have a fabric structure that floats loosely on the surface of the woven or knitted fabric in a loosely bundled form, the raising property is good, and sufficient raising action is required with less raising times than before. Is obtained.

[Brief description of drawings]

FIG. 1 is a process drawing showing an example of a manufacturing process of a long-short composite yarn.

FIG. 2 is a view showing a yarn form in which a long-short composite yarn is treated with boiling water and a difference in shrinkage between long fibers and short fibers is developed.

FIG. 3 is a process drawing showing another example of the manufacturing process of the long-short composite yarn.

FIG. 4 is a process drawing showing still another example of the manufacturing process of the long-short composite yarn.

[Explanation of symbols]

 a long fiber b short fiber d long and short composite yarn 5 air nozzle

Claims (3)

[Claims] 1. A long fiber of synthetic fibers having a boiling water shrinkage of 12% or more and a short fiber bundle of synthetic fibers having a boiling water shrinkage of 7% or more lower than the filaments are entangled with an air nozzle,
The long-short composite yarn thus obtained is woven or knitted at a low density with a cover factor of either warp or weft of 950 or less or 0.52 or less, and the fabric thus obtained is subjected to relaxation heat treatment to obtain short fibers and long fibers. The method for producing an easily raised synthetic fiber fabric, which is characterized in that the bulky fabric obtained by expressing the difference in heat shrinkage is subjected to a raising process. 2. A long / short composite yarn is obtained by stretching a long fiber composed of two kinds of synthetic fibers having different cutting elongations between two nip rollers at an extension ratio intermediate between the two, and drawing only the fiber on the low elongation side. The method for producing an easily raised woven synthetic fabric according to claim 1, which is formed by cutting. 3. The long / short composite yarn comprises two long fiber bundles of synthetic fibers.
The easy-raising according to claim 1, which is formed by performing drafting between two nip rollers, aligning long fibers having a boiling water shrinkage of 7% or more with the obtained short fiber bundle and entangled with an air nozzle. Method for manufacturing synthetic fiber cloth.