JPH0192446A - Nylon profile cross-sectional multifilament fabric - Google Patents

Abstract

PURPOSE: To obtain the subject inexpensive woven fabric comprising non-twist and non-size warp yarns which are nylon 6 multifilament yarns having a specific birefringence and a specified breaking elongation, etc., rich in unique glittering appearance and good in quality without bright linear skitteriness defects by weaving the filament yarns with a fluid jet type loom. CONSTITUTION: This nylon modified cross-section multifilament yarn woven fabric is obtained by weaving nylon 6 multifilament yarns comprising non-twist and non-size warp yarns obtained at >=3,500 m/min takeoff speed and having 0.035-0.045 birefringence ratio, 40-65% breaking elongation, a triangular cross section having >=15% degree of modified cross-section and further 10-80 degree of tangling (CF) with a fluid jet type loom. The woven fabric causes no deterioration of weaving properties as compared with those of using circular type cross-section yarns and has no bright linear skitteriness defects and wale streaks peculiar to the nylon 6 multifilament yarns at all.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a nylon 6 multifilament yarn (hereinafter referred to as "
Nylon 6POY yarn. ), and relates to a two-grade woven fabric manufactured with good weavability using a fluid-jet loom using warp threads having irregular cross-sections without twisting or gluing.

(Prior Art) Conventionally, in certain applications, nylon 6POY yarn has been found to be relatively similar to nylon 6 multifilament yarn (hereinafter referred to as ``nylon 6FDY yarn'') obtained by a two-step process of spinning and drawing. It is well known that it has similar properties. This is as described in JP-A-52-99345 and JP-A-55-8053. Above all, the birefringence is 0.035 to 0.0.
Nylon 6POY yarn of No. 45 has physical properties such as a breaking elongation of 40 to 65% and a hot water shrinkage rate of 12% or less, so it is often used for the weft of textiles, similar to nylon 6F and DY yarn. has been done.

Furthermore, if we look at recent weaving technology, apart from special fields that handle high value-added products, we are trying to reduce weaving costs in many other fields.

Weaving using highly productive fluid jet looms such as water jet looms is popular.

As an example of this case, nylon 6FDY yarn is used as the warp without twisting or gluing, and taffeta, fill, etc. are woven using a high-speed loom, which greatly contributes to cost reduction.

Now, in order to further streamline manufacturing costs for m-products, we are currently using nylon 6POY yarn, which has a great advantage in reducing yarn manufacturing costs, as warp threads without twisting or gluing. Attempts have been made to weave using highly productive fluid jet looms such as water jet looms.

However, it has been found that when nylon 6POY yarn is used as the warp without twisting and is woven using a fluid jet loom, the resulting fabric has serious defects in quality. That is, warp streak-like luster spot defects occur in the warp direction of a 1wt woven fabric, and these are bright line-like luster defects and warp streaks that can be seen at a pitch of 50 to 200 dragons.

This is a meridian defect. However, even when nylon 6FDY yarn is used as the warp and is woven without twisting or slipping using a fluid jet type V@ machine, the woven fabric has glossy spot defects, that is, rain-like irritation in general. It has been known that the following drawbacks occur.

In this way, when weaving without any twist or glue, different luster spots occur in the woven fabric when the warp is nylon 6 POY yarn and when the warp is nylon 6 POY yarn. In this case, the arrangement form of the filaments constituting the yarn after weaving is nylon 5FD.
With a more homogeneous arrangement overall than in the case of Y yarn filaments.

In contrast, nylon 6FD
This is because, in the case of Y yarn, the arrangement form of the filaments constituting the thread after weaving tends to be a non-uniform arrangement form in which they are arranged in various numbers of stages, unlike in the case of nylon 6POY yarn filaments. be.

The reason for this is that first, in the case of nylon 6POY yarn, since the yarn is produced in one step, the formed nylon 6POY yarn inevitably passes through a shorter process than the nylon 6FDY yarn.

Therefore, there are fewer contact points during the process than nylon 5FDY yarn, and because it is wound at high speed,
1@The package is in the form of a cheese, and the number of original twists is inevitably reduced to 1 to 2 times/M, and it is technically difficult to provide entanglement similar to that of nylon 6FDY yarn under high-speed winding. thing.

Furthermore, since nylon 6POY yarn has higher elongation than nylon 6FDY yarn, when weaving it on a fluid jet loom using it as the warp, tension fluctuations due to the shedding movement occur during weaving. Examples include physical properties that make it easy to absorb strain.

Compared to nylon 6FDY yarn, there is less opportunity for the filament arrangement to become non-uniform, and disorder is less likely to occur, and the filament arrangement form unique to nylon 6 POY yarn remains as it is after weaving. be.

On the other hand, in the case of nylon 6FDY yarn, since the spinning process is a two-step process, the nylon 5FDY
The yarn inevitably takes a longer process to pass through than the nylon 6POY yarn, and therefore has more points of contact during the process than the nylon 6POY yarn. 1. For example, there are more contacts with guides, rollers, etc. Also, since a ring stretching machine is usually used, the original twist is about 10 times/M, and it is necessary to make contact with the rings, etc., and to provide a high degree of entanglement to improve weavability. Therefore, there is a greater chance that the filaments will be arranged non-uniformly than in the case of nylon 6POY yarn, increasing the disorder of the filaments in the yarn axis direction.

(Problems to be Solved by the Invention) When weaving the above-mentioned nylon 6POY yarn with a circular cross section as warp threads in a non-twisted state using a fluid jet loom, bright lines occur in the woven fabric. Irregularity defects and the like occur in the same way when weaving nylon 6POY yarn having an irregular cross section, and how to prevent this is also an issue when using irregular cross section yarns. In addition, nylon 6P'OY with an unusual cross section
When yarn is used, much more complex elements are combined than in the case of nylon 6POY yarn, which has a normal circular cross section, so there is a problem of preventing the occurrence of bright line irritation defects etc. mentioned above. other than.

Furthermore, there are the following problems.

In other words, the purpose of using irregular cross-section yarns in woven fabrics is to give the textiles a luster that brings about a sparkling appearance effect due to the diffused reflection of light unique to the irregular cross-section yarns, and to improve the appearance quality. In addition, in the conventional spinning and drawing process of 6POY yarn with irregular cross section, troubles such as yarn breakage and fuzz occur more often than with circular cross section yarn. The problem is that C inevitably appears as a decrease in weavability at the weaving stage, so this must be prevented.

Furthermore, it is possible to improve the appearance quality of textiles without impairing the glossiness and prevent deterioration in weavability.
In the past, these were incompatible issues that would lead to contradictory results, so the two should be made compatible.

There is a problem in that an appropriate cross-sectional shape, degree of irregularity, and degree of entanglement of the filaments must be selected in order to achieve good results.

The present invention aims to provide a fabric that solves these problems.

(Means for Solving the Problems) That is, in the present invention, the birefringence obtained at a drawing speed of 3500 m/min or more is 0.035 to 0.045. Nylon 6 multifilament yarn with a cutting elongation of 40 to 65%, a triangular cross section with a degree of irregularity of 15% or more, and a degree of entanglement (CF) of 10 to 80. It is made of warp yarns with no kink or glue, and is fluid jetted. The gist is a nylon multifilament fabric with a modified cross section that is woven using a type loom.

The structure of the nylon irregular cross-section multifilament fabric according to the present invention (hereinafter referred to as "the fabric of the present invention") will be explained in detail below.

The fabric of the present invention has a take-up speed of 3500 m/min or more, a birefringence of 0.035 to 0.045, and a cutting elongation of 4.
Nylon 0POY yarn having a triangular cross section with a degree of irregularity of 0 to 65% and a cross section of 15% or more.

The warp yarns having a degree of entanglement (CF) of 10 to 80 are used as warp yarns in a non-kink and non-glue state, and are woven using a fluid jet type V7A machine.

In the fabric of the present invention, the warp is nylon 6POY.
The birefringence of the filaments constituting the yarn is 0.035~
The reason why the birefringence index is 0.045 is that if the birefringence index is less than 0.035, problems will occur in the formation of the package itself when producing the nylon 6POY yarn. This is because the yarn quality of the nylon 6 POY yarn will vary greatly over time, making it difficult to use it as a warp. Moreover, the birefringence index is 0.
It is difficult to obtain a value exceeding 0.045 even if various changes are made to the take-up speed, and attempting to obtain it by force will ignore economic efficiency and go against the rationalization of costs.

The filament has a cutting elongation of 40 to 65% because if the cutting elongation exceeds 65%, it is susceptible to deformation due to tension in each process such as the weaving preparation process and weaving process, including the yarn manufacturing process. This is undesirable, and is particularly unsuitable for processes that are subject to complicated tension and heat densities, such as warping and stretching processes, which are carried out as necessary. In addition, the cutting elongation is 40%
It is extremely difficult to obtain a nylon 6POY yarn with the current production technology of less than 100%, and if you try to obtain it by force, it will not be of practical value.

The cutting elongation was measured using a DSS-50 autograph manufactured by Shimadzu Corporation, with a sample length of 30CFI+ and a tensile speed of 30c.
It was measured in m/min.

The triangular cross-section of the filaments that make up the nylon 6POY yarn gives woven fabrics using irregular cross-section yarns as warp yarns a glossy appearance that creates a sparkling appearance due to the unique diffused reflection of light. This is because a triangular cross section is optimal for this purpose; for example, a triangular cross section or a hexagonal cross section cannot provide such gloss.

Furthermore, the degree of atypicality is 15% or more.

If the degree of irregularity is less than 15%, cicada-like irritation defects and warp-stripe defects will occur, and even if the cross-section is triangular, it will not be possible to impart glossiness that brings about a sparkling appearance effect.

Note that 1. Unusual dust in the fabric of the present invention is calculated from a linear equation when the diameter of the inscribed circle of the cross section of the filament is , and the diameter of the circumscribed circle is D2, as shown in Figure 2. Therefore, the irregularly shaped dust is not directly related to the cross-sectional shape of the filament.

The degree of entanglement (CF) of the filaments constituting the nylon 6 POY yarn is 10 to 80.

If the degree of entanglement is less than 10, weavability will be poor.

When the degree of entanglement exceeds 80, weavability is good.

This is because even if the amount of irregularly shaped dust is 15% or more, there will be a "slight problem" in imparting glossiness. Therefore,
In order to improve both weavability and glossiness,
It is necessary to keep the degree of confounding (CF) within the range of 10-80.

2. What is the degree of entanglement (CF) in the fabric of the present invention?

It was measured by the following measuring method described in US Pat. No. 298,599. That is, a load of (sample fineness (denier), Xo, 2) g was applied to the lower end of a 1 m long sample yarn.

A chrome-plated hook with a diameter of 0.7 mm (fineness x 1/30) and a load of g was inserted into the center of the yarn bundle at the upper end of the sample, and the hook was dropped at a speed of about 1 cm/sec, causing the hook to fall at the intertwined part. The distance i4I D until stopping is measured and calculated from the average value of 10 times using the degree of confounding = 100/D.

(for production) The fabric of the present invention is taken at a predetermined take-up speed.

Nylon 6POY yarn, which is made up of filaments with an irregular cross-section and a predetermined birefringence and cutting elongation, is used for the warp, and is rich in gloss that brings about a sparkling appearance.
In order to obtain a fabric with good weavability using a high-speed fluid-jet loom that is free from bright line defects and warp defects, the diffused reflection effect of light due to the triangular cross section is used to impart sufficient gloss to the fabric. In order to eliminate the bright line-like irritation defects and warp defects peculiar to nylon 6POY yarn, we have selected and adopted an appropriate irregular-shaped dust, and in addition, we have adopted an irregular cross-section, which has traditionally had a drastic drop in weavability compared to circular cross-section yarn. In order to eliminate defects in the yarn, the entangling effect between the filaments is used, but at this time, an appropriate degree of entanglement (CF) is set so that the entangling effect does not impair the luster of the sparkling appearance effect. Be selective in hiring.

The present invention makes it possible to obtain a high-quality irregular cross-section yarn fabric with a unique sparkling appearance effect through one or more of the above effects.

(Example) A nylon 6 chip was melted to form (A) (in Fig. 1(a)).
B) (C) This is discharged from each spinneret having a slit-like hole shape whose plan view is shown in (D), and the melting temperature of the chip, the cooling temperature after the nozzle, and the cooling method are changed,
Alternatively, if necessary, the abnormal-shaped dust was changed by changing the absolute value of each side of the nozzle slit, and after cooling, an oil agent was applied and the entanglement treatment was performed so that the degree of entanglement (CF) was 20. rear.

``The pulling speed was 4500 m/min, and from (A) to (A') in the same figure (bl), and from (B) to (B) in the same figure (b).
'') (C) shows (C') in the same figure fb), and CD) shows (D゛) in the same figure (bl). is 52%70
Nylon 6POY yarns of denier/24 filaments were obtained, and these were used as warp yarns to adjust the diameter without twisting or gluing.

The fabric was woven using a fluid jet loom with a gray warp density of 116 threads/inch. Furthermore, the fabric was dyed so that the warp density after dyeing was 121 threads/inch, and the quality of the woven fabric appearance was evaluated.

The results are shown in Table 1. In this case, the same weft as the warp of the sample was used. In addition, the quality judgment of the appearance of the fabric in Table 1 is based on a sensory test and is expressed as follows.

○: No problems, good △: Some problems, but can be used for practical purposes. Overall, the so-called triangular cross section groups, group A with isosceles triangular cross section and group B with scalene triangular cross section, had more problems with triangular cross sections than those with “slightly problem”. In Group C, which has a hexagonal cross section, and Group D, which has a hexagonal cross section, most of the respondents answered that there was no problem, and only a few found that there was a problem. Based on the above, the drawbacks are:

Although it is acknowledged that this is related to the shape of the atypical cross section itself, this can be reduced by selecting the degree of atypicality. Looking at this for Group A, the degree of atypicality is 12%. In the case of sample kA-1, the bright line irritation is ``problematic'' and the meridional muscles are ``slightly problematic'', and in the case of A-2 with an atypicality of 15%, the bright line irritation is ``slightly problematic''. ”, transverse muscles “no problem”
In addition, A-3 and A-4 with an atypicality of 20% or more
In this case, there is no problem with bright line irritation and meridional muscles.
As a result, both defects are eliminated, and neither is recognized at all, and this is exactly the same for Group B.

Next, regarding the gloss that brings about the glittering appearance effect on the back surface, in Group A, it is ``problematic'' at a degree of irregularity of 12%, ``slightly problematic'' at 15%, and ``no problem'' at 20% or more. This is exactly the same for Group B. On the other hand, in the C group, no matter how the degree of atypia is changed, there is no problem, and the same is true for the D group. In other words, for Groups C and D, satisfactory results cannot be obtained as far as glossiness is concerned.

Therefore, there are no bright line irritation defects or meridional muscle defects.

In order to obtain a fabric with good luster, it is necessary to use a filament consisting of filaments whose cross section is triangular, with the degree of irregularity selected appropriately, regardless of whether the irregularity is 9 equilateral or scalene. is over 15%.

Furthermore, it is more preferably 20% or more.

Next, six yarns with different degrees of entanglement were obtained under the same spinning conditions as those of sample 1lhA-2 of Group A in Table 2, except that the degree of entanglement (CF) was variously changed, and these yarns were spun into the warp. It was woven using a fluid jet loom. The weavability at that time was investigated, and the appearance quality of the obtained fabrics was also judged, and these are listed in Table 2.

Of the 8 tables, '4@ Table 1 for quality judgment of object appearance.
The weavability was evaluated as follows based on the frequency of occurrence of warp fuzz.

○; Less than 1.0 times/vehicle/day, good △; 1.0 to 1.5 times/vehicle/day, very good X; 1.6 times/vehicle/day or more, poor Table 2 As is clear from Table 2, the degree of entanglement is greatly related to weavability and the appearance of the fabric.Firstly, regarding weavability,
The higher the degree of confounding (CF), the better, but at least 1
It is necessary that it is 0 or more, and more preferably 20 or more.

Regarding glossiness, the lower the degree of entanglement (CF), the better; it is required to be at least 80 or less, and more preferably 55 or less. In other words, the degree of confounding (C
Regarding F), if the value is too high or too low, either weavability or gloss will be poor, so in order to keep both in good condition, the value should be in the range of 10 to 80. It turns out that it is necessary.

(Effects of the Invention) As described above, the fabric of the present invention 9 is made of nylon 6 with an irregular cross section.
Even though POY yarn is used as a warp without twisting or bending, the surface of the woven fabric has all the bright line irregularities and warp defects that appear when using nylon 6POY yarn. In weaving, there is no deterioration in weavability when compared to the case of using yarn with a 9-circle cross section, and the fabric is of good quality with a sparkling appearance that is unique to fabrics using yarn with an irregular cross section.

It is also an inexpensive fabric.

[Brief explanation of the drawing]

(A), (B), (C), and (D) in Figure 1 (al) are plan views of the spinneret hole type, and (A'), (B', and C') in Figure 1 (b).
(D') is a cross-sectional view of filaments spun from each of the hole types (A), (I3), (C), and (D). FIG. 2 is an explanatory diagram of a method for calculating the degree of atypicality. Diameter of the inscribed circle of the cross section of the Dli filament Dz; Diameter of the circumscribed circle of the cross section of the filament Patent applicant Uni Teiki Co., Ltd. Figure 1 (a) (A) (B) (G) (D) (b ) (A) (B') (C') (D') Second
1. Indication of the case Japanese Patent Application No. 62-126488 2. Name of the invention nylon irregular cross-section multifilament ta product 3. Person making the amendment Relationship with the case Patent applicant residence Address: 1-50 Higashihonmachi, Amagasaki City, Hyogo Prefecture 541 Address: 4-68 Kitakyutabe-cho, Higashi-ku, Osaka Name: Nijiko Riki Co., Ltd. Patent Department Telephone: 06-281-5258 (dial-in) 4;
Date of amendment order: October 50, 1988 (Shipping address: October 250, 1988) /-SX5, "Brief explanation of drawings" column 6 of the specification subject to amendment, Contents of amendment (1) Description Page 20, line 2 [Figure 1 (ill)
A) (B) (C) (D) Correct ``in Figure 1 (a) to ``. (2) "(A'), (B'), and (C'HD') in Figure (b) are the above" in lines 3 and 4 of page 20 of the Mei oI book) to "Figure fb) is Figure 1. I am corrected.

Claims (1)

[Claims] (1) Birefringence obtained at a drawing speed of 3500 m/min or more is 0.035 to 0.045, and cutting elongation is 40 to 65%.
, triangular cross section with atypicality of 15% or more, degree of entanglement (CF
1. A nylon irregular cross-section multifilament fabric, characterized in that it is made of nylon 6 multifilament yarn having a diameter of 10 to 80, and is made of warp yarns with no kink or gluing, and is woven on a fluid jet loom.