JPH01213433A - Weaving of nylon 6 fabric - Google Patents

Abstract

PURPOSE:To obtain the above fabric free from offensive luster and residual interlacements, by using, as the warp yarns, non-twist filament yarns consisting of nylon 6 fiber and by weaving in high speed and in a stabilized state using an air-jet loom. CONSTITUTION:Firstly, nylon 6 fiber is spun at a winding speed of 4,500m/min to produce filament yarns with a birefringence of 0.035-0.045 and elongation at break of 45-60%. Using said non-twist filament yarns as the warp yarns, weaving is carried out using an air-jet loom, thus obtaining the objective fabric with an interlacements (CF number) of 10-50 and partial weave resistance of 0.5-1.5g. Being free from residual interlacements, with no use of water as is the case in a WJL, said fabric is free of defects such as warp stripes or offensive luster.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is directed to fabrics made from filament yarns made of nylon 6 fibers (hereinafter referred to as "nylon 6 POY yarns") obtained by high-speed spinning in a so-called -process method. The present invention relates to a weaving method using an air jet loom (hereinafter referred to as rAJLJ).

(Prior art) In recent weaving technology, attempts have been made to weave using nylon 6 POY threads as the warp and warp yarns or either of them. Considering the characteristics and manufacturing cost, 1. Most of them are water jet looms (hereinafter referred to as WJLJ). Therefore, WJL plays a central role in the development of weaving technology.

However, in weaving using WJL.

Since water is used to transport the weft, nylon 6POY
The elongation of the yarn becomes remarkable due to the presence of water in the WJL, and especially when it is used as a warp without twisting, the elongation of the warp becomes remarkable during weaving.

It is also known that there is irregularity in its elongation.

As a result, warp-like fabric defects occur, and the physical properties of the fabric vary greatly in the length direction. Regarding this, when we investigated the expansion and contraction behavior of 70 denier/12 filament nylon 6 yarn under constant load in wet conditions, we found that nylon 6 P
The OY yarn is 3 times larger than the two-step method from spinning and drawing.
It was confirmed that the nylon G POY yarn elongated by ~4 times, and the recovery rate after weight removal was 6 to 7 times longer for the nylon G POY yarn than for the two-step method. This can also be agreed upon.

Furthermore, nylon 6 POY yarn can
It is known that the coefficient of friction increases. Therefore, when this yarn is used for warp and warp yarns in WJL,
The presence of water increases the frictional force between the warp and weft, which interacts with the fact that the nylon 6POY yarn is naturally easy to stretch.

During structure formation such as during shedding or beating, the arrangement of filament yarns on both warp and warp ends tends to be disturbed.

As a result, in the warp direction, a so-called irritability defect, which is a partial luster spot, appears, and in the weft direction, a similar phenomenon, so-called jam-like defect, appears, both of which affect the quality of the fabric. significantly worsens.

Therefore, it is conceivable that nylon 6POY yarn can be woven using a conventional shuttle loom or rapier loom without using water.

In that case, productivity would be worse than WJL.

(Problems to be Solved by the Invention) Therefore, we focused on the use of AJL, which can be woven at high speed without twisting and without using water, using nylon 6POY yarn as the warp. However, in this case, the weavability is extremely poor due to the generation of fuzz, resulting in an increase in production costs and a significant decrease in the quality of the fabric.Also, if the yarn is entangled to prevent this, it may cause residual entanglement. There is a problem in that it remains on the gray fabric after weaving, significantly impairing the quality of the fabric.

The present invention solves these problems and makes nylon 6POY
To provide a method for obtaining a woven fabric free of irritability defects, jamming defects, and residual entanglement by using threads as warp yarns in a substantially untwisted state, by weaving with good and stable weaving properties at high speed by AJL.

(Means for Solving the Problems) According to the present invention, the birefringence obtained at a spinning winding speed of 4000 m/min or more is 0.035 to 0.045. Cutting elongation is 45~
60% nylon 6POY yarn, the number of interlacing (
CF value) is 10-50. Splitting resistance after weaving is 0.5~
This is a weaving method for a nylon 6 fabric, characterized in that 1.5 g of substantially untwisted fabric is used as the warp and weaved by AJL.

The method of weaving a nylon 6 fabric according to the present invention (hereinafter referred to as the weaving method of the present invention) will be described in detail below.

The weaving method of the present invention uses nylon 6POY yarn obtained by high-speed spinning at 4000 m/min or higher, and has a birefringence index of 0.
035 to 0.045, and its cutting elongation is 45 to 60.
%, the number of entanglements (CF value) given for the entanglement is 10 to 50, and the splitting resistance of the warp yarns unwound from the gray fabric after weaving is 0.5 to 1.5 g. The substantially untwisted yarn is used as the warp.

This is a method of weaving a nylon 6 fabric by AJL.

The nylon 6 POY yarn of the present invention is spun at a winding speed of at least 4,000 m/min as described above, and is further subjected to some hot drawing between spinning and winding.

As mentioned above, the nylon 6POY yarn for the warp in the weaving method of the present invention has a birefringence of 0.035 or more and a cutting elongation of 45 to 60%.

This happens when its birefringence is less than 0.035 or its cutting elongation is less than 45% or more than 60%.

This is because the threads are unable to sufficiently follow the tension applied during the warp preparation and weaving processes, which has a significant negative effect not only on weavability but also on the quality.

Further, in the weaving method of the present invention, the birefringence of the nylon 6POY yarn for the warp is set to 0.045 or less.

This is because it is difficult to obtain a large birefringence exceeding 0.045 like the nylon 6 yarn obtained by the two-step process of spinning and drawing.

In addition, nylon 6 for untwisted warp in the weaving method of the present invention
Entanglements of 10 to 50 entanglements (CF value) are imparted to the POY yarn. In high-speed weaving by AJL, it is necessary to intertwine the threads in order to stabilize the weavability and improve quality based on this, and the degree of entanglement depends on the size and sizing agent used. It is determined in relation to the degree of resistance to fiber splitting that occurs in the yarn due to the addition of fibers.゛At this time, if the number of entanglements (CF value) is less than 10, in order to keep the yarn in a bundled state for maintaining good weavability,
It is necessary to apply an excessive amount of sizing agent or sizing agent to the yarn, which causes new problems such as glue falling off during weaving and clogging of the weave.

On the other hand, if the number of entanglements (CF value) exceeds 50, although the weavability is good, there will be a large amount of entanglement remaining on the gray fabric after weaving, which will significantly impair the quality. Therefore, the number of confounds (CF value) is 10~
If the yarn is provided with an appropriate number of entanglements in the range of 50 to suit the fiber splitting resistance value, sufficiently stable and good weavability can be obtained.

It should be noted that no matter how much glue or sizing agent is applied without complete entanglement, the bundled state that provides good weavability cannot be obtained in the yarn, so it is important to apply appropriate entanglement. On the other hand, it is extremely difficult to obtain a bundled state that provides good weavability for the threads used as warp threads by simply entangling them without adding a sizing agent or a sizing agent. The number of entanglements (CF value) required to obtain a convergence state suitable for high-speed weaving by AJL at a speed of 600 times/min or more is as follows without applying any glue or convergence agent:
60 or more is required. However, it is practically difficult to impart such high entanglement to the yarn, and even if it were technically possible, it would increase manufacturing costs and cause negative effects on the yarn, such as a decrease in strength. Considering this, it is not reasonable.

In the present invention, the degree of confounding (CF value) is
It is determined in accordance with the measurement method described in Japanese Patent No. 5995.

That is, a load of [yarn denier XI/30) Insert a hook with a load of g,
Drop the hook at a speed of about lea/second, measure the distance until it stops at the intertwined part, and calculate the average value of 10 times, v
The degree of confounding = 100/D is determined as v.

Furthermore, in the weaving method of the present invention, the 1-fiber resistance is limited to the substantially untwisted nylon 6POY yarn used as the warp, which is sufficiently stable and good even under the high speed rotation of AJL. This is to bring the yarn into a bundled state necessary for improving weavability and the quality of the resulting fabric. The reason why this value is limited to 0.5 to 1.5 g as measured by warp yarns unwound after weaving is that if it is less than 0.5 g, there is no worry about residual entanglement of the fabric, but when weaving Moreover, if it exceeds 1.5 g, there will be no problem with weavability, but there will be a lot of residual entanglement, which will significantly reduce the quality of the fabric.

In other words, if it is within the range of 0.5 to 1.5 g, the number of entanglements (
This is because, in combination with the fact that the CF value is 10 to 50, a fabric with good weavability and excellent quality can be obtained.

The splitting resistance in the present invention can be controlled by adhering a sizing agent or a sizing agent to the yarn.

That is, a sizing agent or a bundle agent is applied so that the splitting resistance of the warp threads unwound from the gray fabric after weaving is 0.5 to 1.5 g. The method of application is not limited in any way, but may be by a slasher-gluing machine or by application on a two-piece. The type of sizing agent or sizing agent used at that time may be any commercially available sizing agent for woven or knitted fabrics.

The fiber splitting resistance in the present invention is measured in accordance with the method described in Japanese Patent Publication No. 48-3343.

That is, as shown in Fig. 1, the length of the sample is 20 cm.
0 Both ends of yarn 1 are fixed with clamps 2.2'', and only one single yarn is separated at the center of yarn 1.

This is hung on the upper hook 3, and all the remaining single yarns are hung on the lower hook 3'. The lower hook 3' is then lowered at a pulling speed of 20 fins/min. Then, using the strain gauge 4 connected to the upper hook 3, the single yarn separation distance L=lOm
The resistance value at m is read in units of g, and this is taken as the fiber splitting resistance.

Furthermore, in the weaving method of the present invention, the splitting resistance is determined for the warp threads unwound from the gray fabric after weaving. It depends on the state of the warp before weaving (first, it is not possible to accurately measure the splitting resistance due to the influence of entanglement, but in the state of the warp after weaving, it is possible to This is because the 1-fiber resistance can be accurately measured because the entanglement effect existing in the strips can be measured as well.

In addition, reliable measurement of this fiber splitting resistance was made possible for the first time in AJL weaving, and in WJLIQ weaving, it is possible to .

Reliable quantitative measurement data cannot necessarily be obtained.

(Function) In the weaving method of the present invention, nylon GPOY yarns are used as warp yarns in a substantially untwisted manner, and when weaving with AJL, an appropriate number of entanglements (CF value) and appropriate fiber separation after weaving are required. By selecting the degree of resistance and fully demonstrating the synergistic effect.

In addition to maintaining good weavability, there is no residual entanglement, and W
Unlike JL, it does not use water, so it can produce fabrics without defects such as warp lines, warp knitting, and jamming.

(Example) Nylon 6 yarns of 70 denier/12 filaments were spun at a spinning winding speed of 4500 m/min, and yarn A was interlaced and the number of entanglements was 3.
A yarn B having a yarn density of 0 pieces/m was obtained. Their birefringence is 0
．． 04. The cutting elongation was 55%.

As a comparative example, yarn A was first sized using a slasher sizing machine using a sizing agent with a composition of approximately 1:1 blending of polyacrylic acid ester and PVA on the A-B multi-filament yarn. As shown in Table 1, three types of warp yarns that are not related to the weaving method of the present invention are prepared.Secondly, yarn B is glued, and as shown in Table 1, three types of warp yarns that are not related to the weaving method of the present invention are prepared. Six types of warp yarns and one type of warp yarn of a comparative example that is not related to the present invention were prepared, and each of these six types had a density of 107 yarns/inch, and a 70 denier/24 filament nylon multifilament yarn was used as the weft yarn. Weaving was carried out at AJL with a density of 82 yarns/inch and 9 rotations of 650 times/minute, and the weavability and quality of the fabric were examined.

This is listed in Table 1.

Table 1 [Note] The meanings of the symbols ◎ ○ △ × in the "Quality" column of weavability are as follows.

◎: Very good weaving property O: Very good weaving property △: Poor weaving interpolation: 'm Very poor weaving property As is clear from Table 1, yarn A is not intertwined at all.
In other words, in the comparative example that does not involve the weaving method of the present invention, the quality of the fabric is good and there is no problem at all, but the weavability is poor, as shown in the sizing agent coating amount column of the same table. Even if a considerable amount of sizing agent is applied, the splitting resistance does not reach the splitting resistance according to the weaving method of the present invention, and it can be seen that weaving in this state is practically difficult.

On the other hand, yarn B of the embodiment has an entanglement degree of 30 threads/m.
In other words, in the case of the weaving method of the present invention, even if the amount of adhesive applied is not large.

It can be seen that the fiber resistance increases accordingly, and that good weavability and good fabric quality can be obtained.

In addition, the degree of entanglement and yarn used are the same as in the example, but the degree of splitting resistance is 1.7 g, which exceeds 1.5 g.

In other words, 2.1 in cases not related to the weaving method of the present invention.
It can be seen that the quality is extremely poor and there are many residual confounds.

(Effects of the Invention) Since the weaving method of the present invention has the above-mentioned configuration, substantially untwisted nylon 6 POY yarn is used as the warp, and good quality can be achieved based on stable weavability by AJL. Therefore, the weaving method of the present invention greatly contributes to improving productivity and quality.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a method for measuring the fiber splitting resistance of yarn. 1-Thread, 2.2'--clamp, 3.3'--hook, 4-Strain gauge Patent applicant Yu-Teriki Co., Ltd. Stem 1 Figure April 13, 1985

Claims (1)

[Claims] (1) Birefringence obtained at a spinning winding speed of 4000 m/min or higher is 0.035 to 0.045, and cutting elongation is 45 to 60.
% of nylon 6 fibers, the number of entanglements (CF value) is 10 to 50, and the fiber splitting resistance after weaving is 0.5 to 1.5 g, substantially untwisted. of,
A method for weaving a nylon 6 fabric, characterized in that it is used as warp threads and is woven using an air-jet loom.