JPS6134242A - Method for weaving twistless non-sized fabric - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a method of weaving a non-twisted fishmeal fabric.

(Prior Art) In recent years, a method has been practiced in which the sizing process and the twisting process before weaving are omitted to create a non-twisted and non-sizing thread, and this thread is used for weaving. In order to prevent such untwisted and unsealed yarn from deteriorating its handling properties in the weaving process, it is necessary to impart cohesiveness to the yarn, and interlacing has been used as a means for imparting cohesiveness.

Improving weavability by interlacing synthetic fiber multifilament yarns is, for example, USP
3,563,021 is known. - On the other hand, improvements in weaving equipment have made it possible to operate at high speeds, and the raw yarn is now required to have certain quality characteristics. In particular, in water jet rooms operated at high rotation speeds of 400
r/m, we have now entered the era of high-speed rotation (300 r/m or more) being put into practical use.

However, when untwisted, unsized yarn that has been interlaced is used under high-speed rotation, even if the degree of interlacing is sufficiently high, fuzz and loops are likely to occur in the single yarn, resulting in a problem of reduced weavability. A point is occurring.

In addition, in order to improve weavability, attempts have been made to increase the convergence of the interlaced parts and increase the pneumatic pressure during interlacing processing, but this has resulted in an increase in yarn breakage and poor weavability. This not only reduces the quality of the fabric, but also causes problems such as a large number of intertwined portions remaining, which cause irritation on the surface of the fabric and impair the appearance of the fabric.

(Object of the Invention) The object of the present invention is to propose a weaving method that can improve the conventional problems and produce a fabric with excellent weavability and less irritation.

(Structure of the Invention) The present invention provides a method for weaving an intertwined synthetic fiber multifilament in a substantially untwisted and non-glued state as a warp yarn, in which the maximum The interlaced yarn is stretched with a tension in the range of 0.1 to 0.5 g/de in the pre-weaving process so that the entangled yarn has an entangled angle θ of 15° or less and 90% or more of the interlaced parts. A method for weaving a no-twist, no-glue fabric characterized by:

The synthetic fiber multifilament yarn used in the present invention includes:
Polyesters such as polyethylene terephthalate or polybutylene terephthalate.

Preferred examples include polyamide fibers such as nylon 6 and nylon 66.

The synthetic fiber multifilament yarn is subjected to fluid treatment (interlacing treatment). The number of interlacing paths of the interlaced yarn by fluid treatment is an important factor for reducing the irritation of the fabric after fabrication and increasing the operational efficiency of weaving, but it is more important than the number of interlacing itself. , the following confounding state is a more important factor. The number of entanglements of the interlaced yarn used in the method of the present invention, expressed as the number of interlaces after stretching treatment, is in the range of 30 to 50 interlaces/TrL for good weavability.

It is FFK III in terms of irritability on the surface of the fabric.

In order for the number of entanglements after the stretching process to fall within this range, the number of entanglements before the stretching process must be greater than that. The number of confounds that disappear through the stretching process is
Although it varies depending on the applied tension, 10 to 50% of the tension disappears within the range of 0.1 to 0.59/de.

Incidentally, the number of confounds in the method of the present invention is defined in U.S. Patent No. 2.985.
．． This method is based on the method described in the specification of No. 9'15, in which a load of total denier x O, 2 g/de is suspended at the lower end of a sample with a sample length of approximately 1 TrL, and a diameter of 0. Insert a 7M chrome-plated hook, and while supporting it with an insect pin, drop the hook gently at a speed of about 1 cm/sec to find the distance L (cm) until it stops at the intertwined part.

The total weight of the hook is the number of grams of each single yarn denier.

The measurement was performed 50 times, and the number of confounds = 1 from the average value.
Find 00/L.

For the interlaced yarn used in the method of the present invention, the state of the intertwined portion after the elongation treatment is important.

That is, the single filaments in the intertwined portion migrate and intertwine between the inside and outside of the yarn, but the maximum entanglement angle θ of the single filaments with respect to the yarn axis direction is 15° or less. It is important that The maximum entanglement angle θ refers to the maximum entanglement angle θ between the yarn axis and the yarn axis, as shown in FIG. It is sufficient to measure the

FIG. 1 is a plan view illustrating the entanglement angle θ of the interlaced yarn used in the present invention. In FIG. 1, it is determined by the angle θ that the entangled single filaments 2 in the surface layer of the yarn 1 make with the yarn axis.

For actual measurements, we scanned microscopic photographs of the intertwined areas.
This is done by finding the entanglement angle θ.

In the method of the present invention, if the maximum entanglement angle θ exceeds 15°, the generation of fluff during weaving increases, which is not preferable.

Further, it is necessary that the maximum entanglement angle θ of 15° or less accounts for 90% or more of the total entanglement, and if it is less than 90%, the object of the present invention cannot be achieved.

Next, the elongation process is preferably performed with a tension in the range of 0.1 to 005 g/de. The tension is 0.1g/da
In the case of no vortex, the elongation process has no effect and the tension is 0.
．． If it exceeds 5 g/de, the rate of disappearance of entangled portions increases, which is not preferable.

Further, the stretching process can be performed using a winding process in the weaving preparation process, a warping process, etc., but is not limited thereto.

(Effects of the Invention) According to the method of the present invention, it is possible to prevent the generation of fuzz in the warp threads during weaving, and to significantly reduce thread breakage.

That is, during weaving, the warp yarns are subjected to abrasion by the heddles and reeds, which causes fuzz and yarn breakage.

The cause of fuzz is that if the convergence of intertwined yarns is poor when subjected to abrasion, the poorly converged single filaments may break due to friction with the reed or heddle, causing entangled fuzz and loops. , causing thread breakage. For this reason, conventional efforts have been made to increase the number of entanglements to improve convergence, thereby reducing yarn breakage. In order to increase the number of entanglements, the air pressure during fluid treatment was increased, but this increased the number of entanglements and improved the cohesiveness of the yarn, but the loom that rotates this yarn at high speed In this case, simply increasing the convergence will not reduce yarn breakage. In J5 weaving using a loom that rotates at high speed, if the maximum entanglement angle θ of the single filaments in the entangled portion is 15 degrees or less in 90% or more of the cases, the occurrence of fuzz and yarn breakage is significantly reduced. It was something I could skip.

When the single filament comes into contact with a reed or heddle, when the yarn has many intertwined parts where the maximum entanglement angle θ exceeds 15°,
The reduction in frictional properties is thought to be particularly related to the operating angle when the single filaments on the surface layer of the yarn come into contact with the reed or heddle. In friction with the reed or heddle, if one of the single filaments that make up the yarn is cut and becomes fluff, the fluff becomes entangled with the reed or heddle, significantly increasing the frictional resistance. As a result, it is presumed that in many cases, fuzz increases due to the cutting of single filaments one after another, eventually leading to yarn breakage.

Therefore, in the case of interlaced yarns in which 90% or more of the above-mentioned maximum entangled angle θ exceeds 15 degrees, the number of entanglements is large, but conversely,
This results in an increase in thread breakage, which is the complete opposite of what was previously thought.

According to the method of the present invention, even when rotating at high speed, it is possible to weave with the number of entanglements kept at a low level, and the number of entanglements remaining in the fabric can be reduced, which is also effective in reducing irritation. There is.

(Example) Polyester filament yarn (50 denier/20 filaments) was subjected to fluid entanglement treatment, and the number of entanglements was 50/20 filaments.
An entangled treatment system with m was obtained.

The entangling treatment system is unwound with crepe, and without stretching treatment, a tensor whose tension can be adjusted is used, and the yarn is treated with various tensions through the tensor, and the yarn is used as a warp to form a plain weave structure. Woven. Weaving was performed using a water jet loom at a rotation speed of 600 r/m.

Table 1 shows the weavability and the quality of the resulting fabrics.

No. 61 was not subjected to elongation treatment and had a lot of fuzz and poor weavability; No. 002 had insufficient elongation treatment and poor weavability; No. 3 to N
The one with 0.5 was good in both the weavability and the 11 item quality, and the one with N016 had poor convergence and poor weavability. Note that the number of fluffs generated is the number of fluffs generated per 10G block.

[Brief explanation of drawings]

FIG. 1 is a plan view illustrating the entanglement angle θ of the interlaced yarn used in the present invention. θ...Entanglement angle Figure 1

Claims (1)

[Claims] When weaving an entangled synthetic fiber multifilament in a substantially untwisted and unsealed state as a warp yarn, the maximum entanglement angle θ with respect to the yarn axis direction of the filaments constituting the entangled yarn is 15° or less. A nonwoven fabric characterized by subjecting the interlaced yarn to elongation treatment with a tension in the range of 0.1 to 0.5 g/de in a process before weaving so that the interlaced yarn becomes an entangled yarn in which the entangled portion accounts for 90% or more of the total entangled portion. A method of weaving twistless glue fabric.