JPH04209853A - Method for weaving into non-twist and non-size woven fabric - Google Patents

Abstract

PURPOSE:To improve lowering of quality of woven fabric by see-through of weft by heating water fed to a nozzle to a specific temperature or above when non-twist and non-size polyester interlace yarn is woven as warp by a water jet loom. CONSTITUTION:When a non-twist and non-size woven fabric is woven by a water jet loom using a non-twist and non-size interlace yarn of polyester multifilament yarn of polyethylene terephthalate or polybutylene terephthalate, etc., as a warp, water fed to a nozzle is heated to >=20 deg.C to lower the viscosity of water, thus causing the lowering of weft tension to suppress the occurrence of see-through of weft resulted from abrasion resistance among weft warp and dent.

Description

[Detailed description of the invention]

[00011

[Industrial Field of Application] The present invention relates to a method for weaving a no-twist, no-glue fabric. More specifically, the present invention relates to a method of weaving a no-twist, no-glue fabric in which deterioration in fabric quality due to threading is improved. [0002] [0002] [0002] [0002] A method for manufacturing an entangled yarn in which a fluid is sprayed onto a multifilament yarn to create entanglement between the fibers is known from US Pat. No. 3,563,021 and the like. It has been practiced to weave textiles by using interlaced yarns in the warp without twisting or gluing. When the loom was running at a low speed, it was possible to weave the fabric without any problems using this method, but as the speed of the loom increases to over 600 rpm, as in the case of recent water jet looms,
The problem of deterioration in the quality of textiles due to uneven density of weft yarns has become noticeable. [0003] This problem does not become a big problem when using a glued yarn for the warp or when using a twisted yarn. This problem is specific to high-speed weaving in a water jet loom. [0004] This problem will be described in more detail as follows. The problem of deterioration of fabric quality due to uneven density of weft yarns is due to unevenness in the arrangement of weft yarns, and is a phenomenon in which the material of the woven fabric can be seen through depending on the size of the gap between the weft yarns (hereinafter referred to as "this phenomenon"). ). [0005] The second phenomenon rarely occurs over the entire weft width of the weft, and mainly occurs specifically in a region 10 to 50 cm from the edge of the fabric on the front side when viewed from the water jet nozzle side. The length of the passage ranges from 10 to 40 cm. In addition, this phenomenon is not observed in all weft yarns in the drawing section, but occurs randomly in terms of period and length, such as in one place in several or ten weft yarns. [0006] These lines are unlikely to disappear even if the fabric is dyed, and are the main cause of deterioration in quality. [0007] As a result of investigations into various factors, the mechanism by which such wire threads occur is presumed to be as follows. [0008] That is, after the weft is jetted with water from a water jet nozzle and inserted between the open warp threads, the opening of the warp threads is closed by the vertical movement of the heddles, and in the step of driving the weft threads with the reed feathers, the weft threads are inserted between the open warp threads. Phenomena occur in which the warp threads rub against each other, or the weft threads rub against the reed feathers. The frictional resistance added during such rubbing varies due to, for example, subtle fluctuations in the opening and closing timing of the warp, vibrations of the warp, or vibrations of the reed blades, and as a result, the arrangement of the inserted wefts is disturbed, As a result, the line passes through the line. [0009] The larger the frictional resistance, the greater the variation in the frictional resistance that causes these wires to run through. For this reason, it has been found that reducing frictional resistance is important in solving the wire threading problem. [00101 The frictional resistance caused by various types of scratches that cause these threads to pass through can be greatly influenced by the weaving conditions. In other words, when the warp is a sized yarn or a twisted yarn,
Each single yarn that makes up the warp is strongly constrained and bundled, so there is little friction resistance against the weft, whereas when the warp is an interlaced interlaced yarn, each single yarn that makes up the warp is Since they are separated, the resistance to abrasion against the weft is high. For this reason, when the warp is an interlaced yarn, threads tend to occur easily. [00111Also, as the rotational speed of the loom increases, the tension of the weft yarn increases, but the greater the tension, the greater the friction resistance with the warp yarn, and the greater the fluctuation thereof. The arrangement of the weft yarns becomes disordered, making it easy for threads to run through. [0012] By the way, the water jetted from the water jet nozzle is jetted at high speed and then diffuses as it travels toward the opposite side of the nozzle, but the diffusion occurs approximately from the edge of the fabric on the front side as seen from the water jet nozzle. 50-60
The warp yarns become larger from the point of about cm, and the warp yarns of the band on the side opposite to the nozzle from the extraction part become noticeably wet. The water attached to the warp threads is
It acts as a lubricant when the weft and warp, or the weft and the reed, or even the warp and the reed, reduce the frictional resistance caused by mutual friction. As a result of the investigation, it was found that on the nozzle side, the frictional resistance due to abrasion is reduced by the presence of water, while the frictional resistance on the nozzle side where no water is present is large. [0013] Due to these factors, it has been clarified that line penetration occurs at a specific location on the nozzle side. [00141 Above, the problem and cause of deterioration of fabric quality due to threading in high-speed weaving using untwisted and unsealed interlaced interlaced yarn as warp yarns have been explained in detail. [0015] Conventionally, methods for improving the weaving method of untwisted and glueless fabrics using such interlaced interlaced yarns as warp yarns have been disclosed in JP-A-60-151336 and JP-A-60.
This method has been proposed in Japanese Patent Application Laid-open No. 252748, Japanese Patent Application Laid-Open No. 1987-1987, and the like. These methods are certainly effective in improving weavability, but at present they have not yet solved the problem of deterioration in fabric quality due to threading. [0016]

SUMMARY OF THE INVENTION The present invention has been made against the background of the above-mentioned problems of the prior art, and provides a weaving method that solves the problem of the deterioration of fabric quality caused by threading and allows high-speed weaving. With the goal. [0017]

[Means for Solving the Problems] The present invention provides a method for weaving in a water jet loom using non-twisted and non-sizing polyester multifilament yarns to which interlaced interlace is applied to the warp yarns. This is a method for weaving a no-twist, no-glue fabric, which is characterized by heating the weaving material to 20°C or higher. [0018] In the present invention, polyethylene terephthalate and polybutylene terephthalate are used as the polyester multifilament yarns used as the warp yarns constituting the fabric. From this point of view, it is suitable. In addition, the yarn used is an interlaced yarn that has been subjected to an interlacing treatment, and this interlaced yarn is treated by a conventionally known interlacing treatment, in which a fluid such as air is sprayed, so that the number of entanglements is 30 to 30. It is preferable to use an interlaced yarn of 60 threads/m from the viewpoint of satisfying weavability. When the number of entanglements is small, thread breakage and opening defects are likely to occur due to fuzz, loops, etc., and weaving performance is reduced. On the other hand, when the number of entanglements increases, many entangled portions remain in the warp of the fabric, causing noticeable irritation and degrading the quality. [0019] The number of entanglements in the preferable range is based on the number of entanglements measured by a phototube type entanglement degree measuring device described in Japanese Patent Publication No. 43464/1983. [00201 The present invention uses such interlaced yarns as warp yarns without twisting or sizing, warms the water used in a water jet nozzle, and weaves using water whose temperature is 20°C or higher. be. [0021] As detailed in the previous section, weft transparency is mainly caused by frictional resistance caused by friction between the weft and the warp/reed feathers.According to the studies of the present inventors, it is possible to reduce the tension of the weft. It has been found that it is effective to reduce such frictional resistance, and specifically, it is extremely effective to appropriately heat the water used in the water jet room. [0022] That is, when using water at a low temperature of about 10°C or 15°C, the tension of the weft is large and it becomes easy to see through the weft, whereas at 20°C or higher, the tension of the weft is reduced,
Good weft transparency. In addition, if the water temperature is 25℃ or higher, especially 3
A temperature of 0° C. or higher is preferable because the weft transparency is further improved. The reason why the tension of the weft changes depending on the water temperature is not clear, but the viscosity of the water changes depending on the water temperature, and the flying state of the weft that is accompanied by water jetted from the water jet nozzle changes, and as a result, It is assumed that the tension of the weft yarn changes. That is, it is presumed that when the water temperature is low, the viscosity of the water is high and the tension of the weft threads is large, and when the water temperature is high, the viscosity of the water is low and the tension of the weft threads is weakly entrained. The difference in these tensions is
It is presumed that the difference in friction between the weft, warp, and reed feathers and the difference in frictional resistance act, resulting in a difference in linear speed. [0023] In addition, since the viscosity of the heated water is low, the lubricity of the water is further improved, and it is presumed that the frictional resistance due to friction between the weft, warp, and reed feathers is reduced. [0024] The water conventionally used in water jet nozzles is generally groundwater, with an average of 15
It is about ℃. [00251 As mentioned above, the present invention allows the water temperature to be reduced to 20
℃ or above, preferably 25°C or above, particularly 30°C or above, and it is necessary to heat to this temperature. The heating method may be arbitrary, and for example, the heating may be carried out in a tank in which the water supplied to each loom is temporarily stored, or may be carried out in a small container installed in each loom. In any case, it is sufficient that the temperature of the water at the inlet of the water jet nozzle is 20° C. or higher. [0026]

EXAMPLES The present invention will be explained below by way of examples. [0027] The quality of the fabric was evaluated according to the following method. Fabric quality (W value) W
It is graded by 0.5 pitch from o to W5,
Wo had no defects, W5 had large defects, and W+, o or less was judged as passing the textile quality (◯). Note that × indicates a failure. Examples 1-3. Comparative Examples 1 to 2 By blowing air through a 50 denier/20 filament polyethylene terephthalate multifilament yarn through an interlacing nozzle, the number of entanglements measured with a phototube type entanglement measuring device was 50 threads/m. Got the thread. [0028] This thread is used as the warp in a non-twisted and non-sizing state, and a polyethylene terephthalate multifilament thread of 75 denier/36 filaments which is not interlaced is used as the weft, and the warp density is 144 threads/3.
A plain weave fabric was woven in a water jet loom at a rotation speed of 650 rpm with a weft density of 115 threads/3.8 cm and a weft density of 115 threads/3.8 cm. At this time, weaving was performed by changing the temperature of the water used in the water jet nozzle. The weaving results are shown in (Table 1). [0029] Regarding weaving properties, both the comparative example and the example had good results in terms of loom stop and warp fuzz. [00301] [Table 1] As is clear from the results, when the water temperature is low (Comparative Examples 1 and 2), the quality of the fabric is poor, but when the water temperature is 20°C or higher (Examples 1 to 4), the quality of the fabric is poor. Both are good. [00311] [Effects of the Invention] According to the present invention, even when water jet loom weaving is performed at high speed using untwisted and unsealed interlaced interlaced yarns as warp yarns, there is no deterioration in the quality of the fabric due to weft transparency.
It is possible to weave extremely high-quality fabrics.

Claims (1)

[Claims] Claim 1: A method of weaving in a water jet loom using non-twisted and glue-free interlaced polyester multifilament yarns in the warp yarns, comprising:
Water used for water jet loom nozzle at 20℃
A method for weaving a no-twist, no-glue fabric, characterized by heating the fabric to a temperature above.