JP2653845B2 - Method for producing nylon 6 fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nylon 6 multifilament yarn (hereinafter referred to as a nylon POY yarn) obtained by so-called one-step high-speed spinning at a take-up speed of 4000 m / min or more. The present invention relates to a method for producing a nylon 6 fabric used for clothing and other uses, which is used as a warp.

2. Description of the Related Art Conventionally, in a specific application, nylon 6POY yarn has properties relatively similar to nylon 6 multifilament yarn (hereinafter referred to as nylon 6FDY yarn) obtained by a two-step method of spinning and drawing. This is well known, for example, as described in JP-A-52-99345 and JP-A-55-80535. In particular, nylon POY yarns having a birefringence of 0.035 to 0.045 have a cutting elongation of 40 to 65% in physical properties.
Since it has a Young's modulus of 150 to 250 kg / mm ² and a hot water shrinkage of 12% or less, it is often used as a weft for woven fabrics like nylon 6FDY yarn.

Also, in recent weaving technology, we have been using a highly productive fluid jet loom such as a water jet loom in special fields dealing with high value-added products in order to reduce the cost of weaving processing. However, in this case, nylon 6FDY yarn is used for the warp yarn, and taffeta and twill are woven at a high-speed loom rotation speed. At present, we are going one step further and using nylon 6POY yarn as a warp, which offers a great advantage in reducing the cost of fabric production, as a warp, and injecting fluid in a non-twisted, glue-free state in order to further streamline fabric production costs. Attempts to weave with a weaving loom have been made.

On the other hand, as a woven fabric having a special appearance and quality, there is known a fabric having a so-called thick and thin effect in which the appearance has a thick and thin effect and a shading effect. Various means have been proposed as means for imparting this thick and thin effect. Specifically, a so-called partially undrawn portion in which an undrawn portion is formed partially in the longitudinal direction of the yarn in the production process of the raw yarn. The most common example is the use of a yarn, and the method of forming and using a yarn having a thick portion and a detailed portion by a special air processing in a process after the production of the raw yarn is also common.

Problems to be Solved by the Invention However, in the above-mentioned method for obtaining a woven fabric having the appearance of a thick and thin effect, since the former partially undrawn yarn has a portion having a low yarn strength, warp preparation, There is a problem in operability in a weaving process and the like, and the latter method using special air processing has a problem that the cost is greatly increased.

The present invention solves the above-mentioned problem, and nylon 6POY
Taking advantage of the characteristics of yarn, low cost and stable operability, while providing excellent thick and light effect,
That is, an object of the present invention is to provide a method for producing a nylon 6 fabric having an appearance having a thick and thin effect.

Means for Solving the Problems In order to solve the above problems, the method for producing a nylon 6 woven fabric of the present invention was obtained at a spinning take-off speed of 4000 m / min or more.
Birefringence 0.035 to 0.045, breaking elongation 40 to 65% confounding degree (CF value) in Young's modulus 150~250kg / mm ² is nylon 6 multifilament yarns 30-60, polyacrylate At least 2% of a sizing agent containing a sizing agent as a main component is adhered and woven using this as a warp yarn.
The feature is to be 20 or more.

That is, the present invention is based on the fact that the entangled structure added to the nylon 6POY yarn is apparently almost the same as the entangled structure added to the conventional nylon 6FDY yarn, but the entanglement itself is completely different. It is a nylon 6POY
By utilizing the fact that the entanglement of the yarn is difficult to unravel, the entangled portion is positively left on the woven fabric, thereby forming a thickness unevenness substantially, so that a so-called thick and thin effect is exhibited.

As described above, nylon 6POY yarn is inferior to nylon 6FDY yarn in terms of ease of air entanglement and ease of untangling. In addition, a large air pressure is needed to give the nylon 6POY yarn a confounding effect under high-speed running. However, as a result, the entanglement between the filaments is firmly fixed in combination with the elongation, Young's modulus or orientation, which are the characteristics of the nylon 6POY yarn, and the weaving preparation process,
The confounding is difficult to unravel even in the weaving process.

Table 1 shows experimental results confirming the above phenomenon. That is, in Table 1, nylon 6POY yarn, nylon 6F
DY yarn both 70 denier / 24 filament, nylon 6PO
The Y yarn was air entangled by an air entanglement nozzle between the spinning and winding and the nylon 6FDY in the stretching step. The degree of confounding (CF value) was measured according to the method described in US Pat. No. 2,985,995. The yarns having different degrees of entanglement were sized without glue without being glued as warp yarns, woven in a water jet loom at a number of revolutions of 500 times / minute, and the warp was unraveled from a greige machine to measure the degree of entanglement.

As is clear from the description in Table 1, the nylon 6POY yarn has a higher residual entanglement degree after weaving at any entanglement degree than the nylon 6FDY yarn, especially when the entanglement degree of the original yarn is 30 or more. That tendency becomes even more pronounced. According to the results of surface observation of the greige machine, the residual entanglement degree was 10 or more (sample 2
4), you can clearly see the confounding part,
It has an and thin appearance. This phenomenon is, as described above, in the confounding treatment of nylon 6POY yarn, in order to impart the same confounding with nylon FDY yarn at a running speed of the yarn of 4000 m / min or more at high speed, the nylon 6FDY yarn Although it requires a large air pressure and air flow rate compared to the case, and it is practically difficult to impart confounding with a confounding degree of 60 or more, instantaneous large deformation and confounding are applied to the yarn, and Unlike the nylon 6FDY yarn, the yarn itself is easily deformed in terms of physical properties such as Young's modulus and elongation, so it is presumed that the yarn is manifested by forming a strong entangled structure as a result.

The entanglement imparted to the nylon 6POY yarn as described above is difficult to unravel, giving a woven fabric woven using the warp yarn a chic-and-sin-like appearance. In order to achieve the effect, it is necessary to more actively increase the residual confounding to 20 or more, and to realize this, gluing is performed. In other words, by giving a predetermined entangled nylon 6POY yarn to glue to give a bunching effect, even when used as a warp yarn of a high-speed loom such as a water jet loom, most of the imparted entanglement remains and individual The variation in the degree of residual entanglement between the warp yarns is also significantly reduced, and a uniform thick and thin effect is imparted to the fabric surface in both the width direction and the length direction.

As the sizing agent used for sizing the entangled nylon 6POY yarn, a sizing agent containing a polyacrylic acid ester-based sizing agent as a main component in terms of ease of handling, stability of the processing effect, etc., is used. By adhering 2% or more as a solid content to the yarn, the entanglement of the yarn can be left effectively, and a thick and thin appearance can be given to the surface of the woven fabric.

The warp yarn used in the present invention may be a nylon 6 (POY) multifilament yarn having the above characteristics, and the fineness, the number of filaments, the filament cross-sectional shape, the luster and the like can be arbitrarily selected. As the weft, various yarns can be arbitrarily selected. For example, if a yarn having the same degree of entanglement as the residual entanglement degree of the warp is woven as a weft by a fragmentary loom such as a water jet, the warp and the weft are equivalent. A woven fabric having confounding and having a uniform chic and thin effect in both warp and weft can be obtained.

Action In the above configuration, when woven, the entanglement of the warp is difficult to unravel and the degree of residual entanglement can be increased to 20 or more, whereby the thick part and the details are uniformly formed on the warp as a whole, and the excellent thick and thin effect is obtained. Can be easily obtained.

Example Nylon 6 (POY) having a birefringence of 0.039, a breaking elongation of 45.0% and a Young's modulus of 190 kg / mm ² obtained at a spinning speed of 4000 m / min and a take-off speed.
A warp was prepared using a yarn having a degree of entanglement of 35 (yarn A) and 56 (yarn B) of a 70 filament / 24 filament multifilament yarn.

The sizing machine uses a G-3 type warping slasher sizing machine (Tsudakoma Co., Ltd.), and the sizing agent uses a polyacrylate ester water jet room sizing agent (J-6).
By changing the glue concentration, the amount of glue attached is 2.3%, 4.4%, 5.6% for yarn A.
%, And 4.5% of yarn B were prepared.

Using the above warp yarns and a water jet loom, a nylon 6POY yarn 70 denier / 24 filament is used for the weft yarn, the total number of warp yarns is 5,200, the density of the greige machine is 110 / inch, the weft is 80.
A book / inch flat fabric was woven. Table 2 shows the observation results on the degree of residual entanglement of the warp of the obtained greige fabric and the thick and thin effect on the surface.

Comparative Example Nylon 6 (POY) multifilament yarn obtained in the above example 70 filaments / denier degree of 70 filaments / 24 filaments (yarn A), and nylon 6 (FDY) obtained by a two-step method of spinning and drawing by a conventional method ) Multifilament yarn 70 denier / 24
Using a filament having a birefringence of 0.047, a cutting elongation of 42.5%, a Young's modulus of 271 kg / mm ² and an entangling degree of 32 (filament C), gluing was performed in the same manner as in the above example, and the amount of gluing was reduced. 1.8 in A
% And a yarn C of 4.4% were prepared as warp yarns, and the same woven fabric as in the above example was woven. Observing the degree of residual entanglement of the warp of the greige machine and the thick and thin effect on the surface, The results are shown in Table 2.

As is clear from the results shown in Table 2, the nylon 6FDY yarn (yarn C) of the comparative example has an average degree of residual entanglement of about 5 even though the glue adhesion amount is 4.4%. And therefore the warp direction of the fabric surface
No syn effect was observed. In the case of Nylon 6POY yarn A with 1.8% glue adhesion amount, the degree of residual entanglement is 16 and a certain degree of thick and thin effect is recognized, but the dispersion in the warp direction and the weft direction of the woven fabric varies. It is conspicuous and generally has a low degree of expression, and the appearance is rather a defect due to inhomogeneity.

On the other hand, in the present embodiment, the yarn 6A of the nylon 6POY yarn is glued to the yarn A having a degree of entanglement of 35 and the yarn B of 56 to have an adhesive amount of 2% or more. And the variation of the residual entangled portion in the warp and weft directions of the woven fabric is significantly reduced, and the thick portion and the details are stably expressed on the woven fabric surface uniformly, and the thick or thin effect or shading A woven fabric having an excellent so-called chic and thin effect can be obtained easily and at low cost.

Effect of the Invention As described above, in the method for producing a nylon 6 woven fabric of the present invention, the birefringence obtained at a spinning take-off speed of 4000 m / min or more is 0.035 to 0.045, the elongation at break is 40 to 65%, and the Young's modulus is 150
250250 kg / mm ² , the degree of entanglement is 30-60, and 2% or more of a sizing agent containing a polyacrylate sizing agent as a main component is adhered.
By weaving the so-called nylon 6POY yarn using the entangled glued yarn as the warp, the entanglement of the warp is difficult to unravel upon weaving, the residual entanglement degree can be made 20 or more, and the thick part and details of the warp as a whole A variety of high value-added nylon 6 fabrics that are uniformly formed and have excellent chic and thin effects can be obtained easily and at low cost.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-99345 (JP, A) JP-A-63-120137 (JP, A) JP-A-62-21839 (JP, A) JP-A 61-99 70042 (JP, A) JP-A-1-183549 (JP, A) JP-A-1-229839 (JP, A)

Claims (1)

(57) [Claims] 1. An entangling degree (CF value) obtained at a spinning take-off speed of 4000 m / min or more, a birefringence of 0.035 to 0.045, a cutting elongation of 40 to 65%, and a Young's modulus of 150 to 250 kg / mm ^2. Is attached to a nylon 6 multifilament yarn having a size of 30 to 60 by 2% or more of a sizing agent containing a polyacrylate ester sizing agent as a main component, woven using the warp yarn, and the degree of residual entanglement in the warp yarn in the woven fabric. 20
A method for producing a nylon 6 fabric, characterized in that: