JP3001299B2 - Method for producing nylon 6 fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to reduce wrinkles and spots during dyeing, which are likely to occur when using nylon 6 multifilament yarn (hereinafter referred to as "nylon 6 POY yarn") obtained by high-speed spinning in a woven fabric. The present invention relates to a method for producing a nylon 6 fabric that can be prevented.

[0002]

2. Description of the Related Art It is well known that nylon 6 POY yarns have various characteristics. In particular, nylon 6 POY yarns have a winding speed of 3500 m / min or more.
POY yarn is not inferior to nylon 6 filament yarn (hereinafter referred to as "nylon 6FDY yarn") produced through a usual spinning-drawing process for a specific application. For example, Japanese Patent Application Laid-Open No. 52-9934
No. 5, JP-A-55-80535, and the like. For this reason, high-quality nylon 6POY yarns, which are less expensive to manufacture and have less thickness unevenness and dyeing unevenness than nylon 6FDY yarns, can be used for both warp and weft yarns for fabrics, or warp or weft yarns. Attempts have been made to use one of them.

[0003]

However, the nylon fabric using these nylon 6POY yarns for both the warp and the weft has a fatal defect. The fatal defect is the occurrence of wrinkles and blind spots during dyeing of a greige fabric woven with nylon 6POY yarn.
This is most likely to occur when nylon 6POY yarn is used for both the warp and the weft, and wrinkles and crinkles occur in the dyeing process even if the greige is normal.

[0004] The inventor of the present invention examined conditions in each step of the pre-setting, dyeing and final setting, including the scouring step, in order to prevent the occurrence of wrinkles and blurring in the dyeing step. No remarkable effect was observed,
It has been found that the cause of these defects is the greige characteristics before the dyeing process, and the present invention has been achieved. The present invention has found that wrinkles or wrinkles generated on a nylon fabric using at least a nylon 6POY yarn for a warp yarn are provided. It is an object of the present invention to provide a method for preventing shortcomings.

[0005]

The present invention achieves the above object and has the following construction. The present invention relates to a nylon having a birefringence of 0.035 to 0.045, a boiling water shrinkage of less than 10%, and a maximum thermal stress of less than 0.15 g / denier obtained by high-speed spinning at a winding speed of 3500 m / min or more. Using a 6-filament non-twisted, non-glue-free warp as a weft, the weft uses a nylon 6 multi-filament whose boiling water shrinkage is 2% or more greater than the warp and the maximum thermal stress is 0.03 g / denier or more. A gist of the present invention is a method for producing a nylon 6 woven fabric, which is woven and dyed in an etroom.

The maximum thermal stress is measured by applying a K15-1 type thermal stress measuring device manufactured by Kanebo Engineering Co., Ltd. to the sample at an initial load of 0.015 g / denier,
The temperature is raised at 00 ° C./180 seconds to obtain a thermal stress curve, which is referred to as the maximum value of the curve. The boiling water shrinkage rate is JIS
According to the hot water shrinkage rate A method (skew shrinkage rate) of L1013, the shrinkage rate when treated with boiling water for 30 minutes.

[0007] In the present invention, 3500m used for warp
The reason for setting the birefringence of the nylon 6POY yarn obtained at a winding speed of not less than 0.035 / 0.045 to 0.035 / 0.045 is that when the birefringence is less than 0.035, the nylon 6POY yarn is produced. This causes a problem in the formation of the package itself, and furthermore, the obtained nylon 6POY yarn has a large fluctuation in the yarn quality due to a change with time, which makes it difficult to use it for fabrics. If the birefringence exceeds 0.045, it is difficult to obtain even if the production conditions such as the winding speed are changed. Is against the rationalization of

The reason why the boiling water shrinkage of the nylon 6POY yarn used for the warp is set to 10% or less is that the boiling water shrinkage tends to decrease as the winding speed increases, and the winding speed is 3500 m / m. In the case of a nylon 6POY yarn having a length of more than 10 minutes, a yarn having a boiling water shrinkage of 10% or less can be obtained, and a yarn having a boiling water shrinkage lower than that of the weft is used for the warp.

[0009] The maximum thermal stress of the nylon 6POY yarn used for the warp is 0.15 g / denier or less because the nylon 6POY yarn having a winding speed of 3500 m / min or more has a low maximum thermal stress. This is because a yarn having a maximum thermal stress lower than that of the weft can be easily obtained as a yarn having a density of 0.15 g / denier or less. Needless to say, the raster and cross-sectional shape of the nylon 6POY yarn used in the present invention are not particularly limited.

As described above, nylon 6POY yarn has a smaller absolute value of boiling water shrinkage and thermal stress and a lower Young's modulus than nylon 6FDY yarn obtained by ordinary spinning and drawing. Among them, the former shrinkage characteristic causes wrinkles and blurring during dyeing. In other words, in the scouring and dyeing process performed in the spread state, the fabric made of nylon 6POY yarn has a small shrinkage force against heat, so if a slight doubling or skew of the fabric occurs, it is not absorbed by the shrinkage of the fabric, The present inventor has found that leaving the fabric as a wrinkle or an eye-like defect as it is is the biggest factor.

In each process of dyeing processing in which the fabric is spread and the warp direction of the woven fabric is tensioned by a roll or the like, the shrinkage force in each of the warp and weft directions of the woven fabric greatly affects wrinkles and misalignment. I have. By providing a certain difference or more in the shrinkage characteristics between the warp direction and the weft direction of the woven fabric, it is possible to absorb slight doubles and skews of the fabric, and also to create slight wrinkles and streaks that have already occurred on the greige machine. Since the deviation can be absorbed, the fabric can be formed without these wrinkles or deviations after dyeing. Of course, there is no problem as long as the greige fabric has a strong shrinkage property in both the warp and weft directions. However, when a nylon 6POY yarn having a low shrinkage property, which is the basis of the present invention, is used for both the warp and weft, the entire fabric is used. Since it is difficult to increase the shrinkage characteristics of the warp, it was concluded that it is effective to make the shrinkage characteristics different between warp and weft.

A feature of the present invention is that a nylon 6POY yarn having a smaller shrinkage characteristic is used for a warp, and a nylon yarn having a larger shrinkage characteristic than a warp is used for a weft. As described above, the nylon 6POY yarn used for the warp has a boiling water shrinkage of less than 10% and a maximum thermal stress of 0.15 g /
Although less than denier, this nylon 6POY yarn is
During the period from discharge of high-speed spinning to winding, it can be obtained by winding without performing a process such as heat stretching or by hot stretching through a hot roll. In the present invention, the weft has a boiling water shrinkage of 2% or more larger than the warp and a maximum thermal stress of 0.0.
A nylon yarn larger than 3 g / denier is used. The nylon yarn is a two-step method in which hot stretching is performed through a hot roll during the period from high-speed spinning discharge to winding, or a normal spinning and stretching. Nylon 6FDY yarn obtained by the above method.

The loom used for weaving in the present invention may be any, but it is preferable to use a fluid jet loom represented by a water jet room. The dyeing finishing in the present invention refers to refining, dyeing, setting, resin processing, etc., which are generally performed on nylon fabrics, and it is not necessary to employ special conditions in order to carry out the present invention.

[0014]

In a woven fabric using nylon 6POY yarn, which generally has a small boiling water shrinkage and a small thermal stress value, a yarn having a small shrinkage characteristic is used for a warp and a yarn having a large shrinkage characteristic is used for a weft. Therefore, if a difference in shrinkage characteristics is provided between the warp and the weft to bias the shrinkage in the direction of the weft, the wrinkles of the greige machine, wrinkles such as doubling and skew of the fabric generated during the dyeing process, etc. Since the cause of the deviation can be absorbed, wrinkles and unsightly of the woven fabric can be completely prevented.

[0015]

Embodiments will be described below with reference to embodiments. Intrinsic viscosity 1.
Nylon 6 (semi-dal) at a spinning temperature of 270 ° C.
Discharge from a die with a hole diameter of 0.2 mm and 12 holes, 4000 m
/ Yarn (No. 1) which was spun at high speed at a winding speed of 1 min / min and a 10% heat stretched through a 150 ° C. hot roll (yarn sample No. 1) before winding.
Two types of yarns of 2) were obtained and used for warp. In the same manner, the product was discharged from a die having 24 holes, spun at a winding speed of 4000 m / min, and spun as it was (yarn sample No. 3). 10
% (Yarn sample No. 4) and nylon 6 (semi-dal) having an intrinsic viscosity of 1.0 were mixed at a spinning temperature of 27%.
Dispensed from a die with 0 ° C, a hole diameter of 0.2 mm, and 12 holes, 120
Spinning at a spinning speed of 0 m / min and drawing at a draw ratio of 3.5 by a normal two-step method (yarn sample No. 5).
Various types of yarn were obtained and used for weft. The properties of these yarns are shown in Table 1.

[0016]

[Table 1]

The warp yarns shown in Table 1 were warped with no twist and no glue to prepare warps. The total number of warps is 5,200
A book, a reed density of 72 birds / whale size, and two birds. For each warp, the weft is a yarn sample No. 3 to 5 shown in Table 1.
Was used as it was, and six kinds of nylon taffeta (woven fabric samples No. 1 to 6) were woven in a water jet room. The density of the obtained greige is dry (80 ° C, 20m / mi
n) In the later state, the density was 104 lines / inch and the weft density was 80 lines / inch.

The six types of greige fabrics of the obtained fabric samples Nos. 1 to 6 are subjected to a dyeing / finishing process including a scouring-preset-jigger dyeing-final finishing set as a main process. The degree of occurrence of cross-over was evaluated in two stages of ○ (no occurrence) and × (strong wrinkles, with cross-over), and the results were combined with the difference in the boiling water shrinkage rate between the weft combination and the weft. Table 2 shows the difference between
It was shown to.

[0019]

[Table 2]

As is clear from Table 2, the fabric samples Nos. 2 to 3 and No. 6 of the present invention were free from wrinkles and spots after the dyeing process, and good quality was obtained. On the other hand, the fabric samples Nos. 1, 4 and 5 having a small difference between the warp and the weft having the boiling water shrinkage and the maximum thermal stress.
In the test, severe wrinkles and wrinkles were observed, and both were rejected.

[0021]

According to the present invention having the above-described structure, a fabric is manufactured using nylon 6POY yarn, which generally has a smaller boiling water shrinkage and thermal stress than nylon 6FDY yarn. In this case, it is possible to easily prevent wrinkles and unsightly spots at the time of dyeing processing, which are fatal defects, and greatly contribute to stabilization of quality as well as rationalization of fabric production costs.

Claims (1)

(57) [Claims] The birefringence obtained by high-speed spinning at a winding speed of 3500 m / min or more is 0.035 to 0.045, the boiling water shrinkage is less than 10%, and the maximum thermal stress is less than 0.15 g / denier. Nylon 6 multifilament is used as warp without twist and without glue, and the weft has a boiling water shrinkage of 2% compared to the warp.
A nylon 6 multi-filament having a large thermal stress and a maximum thermal stress of 0.03 g / denier or more is woven in a water jet room and dyed and finished.