JPH04185726A - Interlace yarn - Google Patents

Abstract

PURPOSE:To obtain an interlace yarn capable of following the number of rotation of a high speed loom by subjecting a synthetic fiber multifilament yarn to interlacing treatment to ptovide an interlace yarn having specific interlace number and to a tension treatment, and then keeping the interlace retaining ratio to a definite value or above. CONSTITUTION:The objective interlace yarn obtained by subjecting a synthetic fiber multifilament yarn to interlacing treatment to provide an interlace yarn having a interlace number in the range of 15/m to 35/m, and having >=70% interlace retaining ratio after tension treatment of 3g/d. Furthermore, the interlace yarn can follow the number of rotation (800-1000rpm) of a high speed loom which a conventional interlace yarn could not be woven and exhibits good weaving property, because interlace retaining ratio is high after said tension treatment of 3g/d.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a no-twist, no-size yarn.

[Conventional technology]

Conventionally, there has been a method of applying a sizing agent by dissolving it in a finishing agent to the warp yarns for untwisted, no-sizing fabrics produced by direct stretching, and a method of improving cohesiveness by adding interlacing (interlacing between filaments). JP-A-55-132728, JP-A-61-174437) were proposed and
It is said that it can be used in water jet rooms. On the other hand, advances have been made in making each part of the loom smaller and lighter, using appropriate materials, etc., making it possible to operate at high speeds, and we are now at the stage where water jet looms are being put into practical use at speeds of 800 to 11,000 rpm.

However, as the speed increases beyond soorpm, the interlacing that is applied to the warp threads during weaving is caused by contact between the warp threads, contact between the warp threads and various parts of the loom, rubbing, and beating. No significant effect can be expected with weak interlacing that eliminates the problem.

As a countermeasure to this problem, attempts have generally been made to increase the number of entanglements, but this not only reduces the weavability by increasing thread breakage and fuzz during weaving, but also causes many interlaces to remain, causing surface irritation of the fabric. However, problems such as impairing the quality of textiles are occurring.

In addition, as the spinning speed has increased in recent years, when trying to increase the number of entanglements in multifilament yarns,
Since the interlacing pressure must be increased, fuzz and thread breakage during spinning will increase.

As a way to solve this problem, Japanese Patent Application Laid-open No. 110914/1983 proposes increasing the spinning speed to 5000 m/min to solve the problem of fuzz and yarn breakage.

By spinning at such high speed, the internal structure of the discharged yarn becomes extremely dense, crystallization is promoted, and the physical properties of the yarn are improved. Therefore, one or more interlaced nozzles are used under high pressure and high tension. It is said that confounding can be handled by

However, from the point of view of yarn entanglement, it can be said that this yarn is within the technical range of providing a larger number of entanglements.

Is this acceptable if the loom rotates at a low speed of 600 rpm?
In the field of high-speed looms with speeds higher than p, we run into the limit of having to further increase the number of entanglements.

In addition, in weaving without twisting and without glue, it is necessary to consider the above-mentioned irritation of the final product, and we have reached the conclusion that we must move away from the idea of simply increasing the number of entanglements.

[Problem to be solved by the invention]

The object of the present invention is to improve such conventional problems and to provide an intertwined yarn that can follow high-speed loom rotation speeds of 800 to LO00 rpm for use in no-twist and glue-free weaving, and can yield woven fabrics with less irritation. That is.

[Means to solve the problem]

That is, it is an interlaced yarn obtained by subjecting a synthetic fiber multifilament yarn to an interlace treatment, and the number of entanglements of the interlaced yarn is in the range of 15 to 35 strands/'m, and 3.
This is an interlaced yarn characterized in that the interlacing retention rate after g/d tension treatment is 70% or more.

The interlaced yarn of the present invention needs to have a number of entanglements of 15 to 35 yarns/m. If the number of entanglements is lower than 15 strands/m, the weaving efficiency will be extremely reduced, and if it exceeds 35 strands/m, the number of thread breakages and fuzz will increase, which will not only reduce the weaving property but also cause a large number of interlaced parts. This may cause problems such as remaining and causing irritation of the fabric parts and impairing the quality of the fabric.

Furthermore, the interlacing retention rate of the interlaced yarn of the present invention is 3 g/d.
It is necessary that the tension is 70% or more after the stress treatment. In JP-A-55-132728, it is stated that the interlacing retention rate under a static load of r Ig/d is 80% or more J.
Since the interlace treatment is performed under high tension and pressure, the degree of entanglement is weak and when measured under a high tension of 3 g/d, the interlace retention rate is reduced by about half. Therefore, as the number of rotations of the loom increases, the tension applied to the warp yarns during beating also tends to increase, from the conventional 1 to 2 g/d to about 3 g/d.
It has been found through research by the present inventors that it increases to d. In other words, it is necessary to have a convergence property that can withstand this 3 g/d tension, and it has been found that a high weaving efficiency is indicated by an entanglement retention rate of 70% or more after the 3 g/d tension treatment. If the above conditions are not satisfied, a sufficient weaving efficiency cannot be obtained due to excessive fluff during weaving.

The number of entanglements in the present invention refers to a value determined by the water immersion method.

The water immersion bath used in the present invention has a length of 1.2 m, a width of 15 cm, and a depth of 5 cm, as shown in Figure 2.
Partition plates were installed at 10 cm from both ends of the bus in the longitudinal direction to divide the bath into three water tanks.
4) is satisfied. Next, the water overflows from the measurement tank to the drainage tank (15) and is discharged from the hydroponic water port (16). In this way, fresh water is constantly overflowed at a flow rate of about 500 cc/min. This is to prevent the finishing agent adhering to the polyester yarn from spreading on the water surface when the polyester yarn is dipped, making it difficult for the yarn to open when a new yarn is dipped next. That is, by constantly supplying fresh water, it is possible to remove the finishing agent film that has spread over the water surface.

In addition, it is preferable to attach a black sheet to the bottom of the bath so that the intertwined parts and unraveled parts of the yarn can be clearly seen and the number of intertwined parts can be easily read.

Next, in the measurement method, a yarn is unwound from the package obtained according to the present invention, and a length of 1.2 m is measured by applying a load of 200 cm.

Holding both ends of this thread in a relaxed state, dip the center part and read the number of parts 17) with a length of 2 mm or more (fb in Figure 2) from the intertwined part. Find the number of pieces per distance (distance between).

The above measurement is repeated 10 times and the average value is determined.

The entangling portion must be 2 mm or more, indicating a strong conjugation force.

Furthermore, the term "entanglement retention rate" as used in the present invention refers to a value measured by the following method. The measuring device used was Tensilon (trade name: UMT-II [-1000) manufactured by Toyo Baldwin Co., Ltd.
Use a dial gauge to set the raw yarn length (50 cm) and the yarn length under 3 g/d tension in advance.

Thereafter, both ends of the 50 cm thread were gripped with air chuck and pulled at a tension speed of 300 mm/min to a tension of 3 g/d. Then, it is set in static suspension for 30 seconds under a tension of 3 g/d, and the intertwined area (converted to 1 m) is determined by the method described above, and the intertwined retention rate (%) at a tension of 3 g/d is calculated.

On the other hand, as the interlacing nozzle for producing the interlaced yarn of the present invention, for example, the nozzle described in JP-A No. 58-220808 or the nozzle described in JP-A No. 63-206272 can be used. There is no particular limitation as to whether it is preferable to have two or more holes.

Also, is it preferable to use high interlace air pressure?
The higher the pressure, the higher the winding tension (tension between the second godet roller and wine goo) tends to be.
It is important to correct the tension to the appropriate level.

In other words, by relaxing between the second godet roller and the wine goo, it is possible to obtain a homogeneous package with little variation in the yarn length direction and a high entanglement retention rate.

〔Example〕

Example 1 In addition, the evaluation method of the entangled yarn was performed as follows.

1) The weaving machine was operated continuously for 10 days, and the average number of machine stops due to warp threads per 24 hours was determined. The number of stops is 1.2
times/unit/day is the permissible limit.

2) The quality of the fabric was evaluated as good if no difference in color shade, called irritation, was observed with the naked eye on the surface of the fabric at a speed of 30 m/min using a flow inspection machine.

3) The overall evaluation was determined based on the overall quality of the cloth and the quality of the fabric.

Examples 1-4. Comparative Examples 1 to 3 Polyethylene terephthalate having an intrinsic viscosity of 0.60 and containing titanium oxide was discharged with a discharge hole diameter of 0.23 mmφ and a discharge hole number of 2.
The spun filament is melted and spun using a 4-hole spinneret at a spinning temperature of 295°C. After cooling and solidifying, a finishing agent is applied using an oiling roller. A 50 denier/24 filament was wound under the following conditions while changing the filament.

Note that the interlace nozzle is as shown in Figures 3 (a) and (b).
) with an injection hole diameter of 1.2 mmφ and an effective length (
L+) 12ffI [11, Nozzle front and rear guide length (L2
) 35mmmm.

In addition, the thread channel is constructed of either a wall around the entire circumference or ceramic.

1st godet roller, circumferential speed 1500 m/min: surface temperature 85°C: number of turns 7 times 2nd godet roller 2 circumferential speed 4500 m/min: surface temperature 135°C: number of turns 6 times Winder speed (m/min): winding Tension 0.2g/d(1
0g).

The physical properties of the obtained yarn, 50 denier/24 filament, were lower than that of the conventional drawing burn, and the thermal stress was reduced by about half.

These 5,100 threads were used as warp threads, and polyester threads of 75 denier/36 filaments were used as weft threads, and a water jet loom loom (manufactured by Tsudakoma Kogyo, trade name: ZW-3) was used.
Taffeta was woven using a loom (Model 03) at a loom rotation speed of 85 rpm.

The resulting fabric is dyed and finished, resulting in a product that is even softer than conventional products.

Table 1 shows the loom's Keikoku stop and the quality of the fabric at this time.

Comparative Example 4 Taffeta was woven and dyed under the same conditions as Examples 1 to 4 using a conventional non-combustible and unsized yarn obtained by drawing and interlacing ordinary undrawn yarn as the warp, and evaluated. The results obtained are shown in Table 1.

Blank space below: Examples 5 to 9. Comparative Examples 5 to 6 Polyethylene terephthalate having an intrinsic viscosity of 0.60 and containing titanium oxide was spun with the same content as in Example 1, and a finishing agent was added thereto. A 50 denier/24 filament was then spun under the following conditions while changing the interlacing pressure. I rolled it up.

First godet roller: Circumferential speed 2100 m/min: Surface temperature 85°C: Number of turns 7 times Second godet roller 2nd circumferential speed 4950 m/min: Surface temperature 135°C: Number of turns 6 times Winder speed (m/min): Winding tension 0.2g/d(1
0g).

The obtained 5,100 yarns were used as warp threads, woven according to the same specifications as in Example 1, dyed and finished, and evaluated. The results obtained are shown in Table 2.

〔Effect of the invention〕

Even if the interlaced yarn of the present invention has a lower number of entanglements than conventional yarns, the
/d Since the entanglement retention rate after tension treatment is high, it can be used in high-speed looms of 800 rpm to 11,000 rpm, which conventionally could not be woven with entangled yarns, and exhibits good weavability.

Therefore, it is possible to easily obtain a uniform woven fabric with good final woven fabric quality.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram schematically showing an example of manufacturing the entangled yarn of the present invention, and FIG. 2 (a) is a perspective view for explaining the method for measuring the number of entanglements in a water-immersed body. and Fig. 2(b)
The entangled part (17) and the defibrated part (18) when immersed in water.
FIG. 3 is a plan view schematically shown for explaining the
1. (bl is a cross section and a vertical side view of an interlace nozzle used for manufacturing the interlaced yarn of the present invention, respectively. 1... Spinning nozzle, 2... Oiling roller, 3...
...First godet roller, 4... First separator roller, 5... Second godet roller, 6... Second separator roller, 7... Interlace nozzle, 8...
...Twilling guide, 9... Winding cheese, 10... Yarn, 11... Water bath, 12... Water supply port, 13.
...Aquarium, 14...Measurement tank, 15...Drainage tank, 1
6...Water outlet, 17...Entwining part, 18...Fiber opening part, I9...Yam path, 20...Compressed air inlet, 21...
・Thread slit, 22... Nozzle front guide, 23・
... Nozzle rear guide, Ll... Nozzle effective length, L2.
...Distance between the front and rear of the nozzle guide. Patent applicant: Asahi Kasei Industries, Ltd.

Claims (1)

[Claims] 1. An interlaced yarn obtained by interlacing synthetic fiber multifilament yarn, the number of entanglements of the interlaced yarn being 1.
An interlaced yarn having an interlacing retention rate of 70% or more after being subjected to a tension treatment of 3 g/d.