Spinning yarn for loop pile, method for producing the same, loop pile towel using the same, and method for producing the same

Abstract

Provided are a spun yarn for loop pile, a loop pile towel, and a method for producing the same, which have good pile erectability and high characteristics such as water absorbency, washability, and durability. 【Solution means】A spun yarn for loop pile containing cotton fibers, not containing water-soluble fibers, the spun yarn for loop pile is an untwisted or slightly twisted single yarn, and there are twist marks in the length direction of the yarn. This manufacturing method is such that when a plurality of roving yarns 12a and 12b are subjected to true twisting by one traveler 22 by a sirospun spinning device 10 to form an untwisted or slightly twisted single spun yarn, false twisting is applied by a friction belt 25 upstream of the traveler 22 to impart twist marks in the length direction of the yarn and then wound up.

Description

Technical Field

[0001] The present invention relates to a spun yarn for loop pile using siro spun yarn for pile yarn, a method for manufacturing the same, a loop pile towel using the same, and a method for manufacturing the same.

Background Art

[0002] Conventionally, towel fabrics are basically made into pile fabrics using warp pile yarns, warp ground yarns, and weft ground yarns. In addition, in order to improve the water absorption of towel fabrics, the basis weight (mass per unit area) is relatively high, and thick and high - fineness yarns are used as the constituent yarns. Patent Document 1 proposes using siro spun yarn of synthetic fiber as a base yarn for pile. Patent Documents 2 to 3 propose using siro spun yarn of slack twist as a pile knitted fabric. The present inventors have proposed in Patent Document 4 a siro spun yarn using two or more thick yarns, which is an untwisted or slack - twisted yarn.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, the above - mentioned conventional technologies have problems regarding characteristics such as water absorption, washability, and durability of towels, and further improvement has been demanded.

[0005] In order to solve the above-mentioned conventional problems, the present invention provides a spun yarn for loop pile, which has good pile erection property, soft and bulging texture, and high properties such as water absorption, washability, and durability, a method for manufacturing the same, a loop pile towel using the same, and a method for manufacturing the same.

Means for Solving the Problems

[0006] One embodiment of the present invention is a spun yarn for loop pile made of cotton fibers Composed of which does not contain water-soluble fibers, and the spun yarn for loop pile is an untwisted or slightly twisted single yarn, , with a twist coefficient K of 0 to 2.9 and there are twist marks in the length direction of the yarn relates to a spun yarn for loop pile. , there are parts with more twists and parts with fewer twists in the length direction of the yarn. The parts with more twists are thinner, and the parts with fewer twists are thicker However, the twist coefficient (K) is calculated by the following formula (Equation 1). However, t: number of twists (turns / 25.4 mm), S: cotton count (English cotton count)

Equation

[0007] Another embodiment of the present invention is a method for manufacturing the above-mentioned spun yarn for loop pile, which relates to a method for manufacturing a spun yarn for loop pile, in which a plurality of roving yarns are drafted by a sirospun spinning device and combined and twisted to form an untwisted or slightly twisted single spun yarn, By a friction belt and false twist is applied to impart twist marks in the length direction of the yarn and then wound up.

[0008] Still another embodiment of the present invention is a loop pile towel using the above-mentioned spun yarn for loop pile, The pile yarn of the loop pile towel is an untwisted or slack-twisted single yarn with a twist coefficient K of 0 to 2.9 which relates to a loop pile towel in which pile stands almost vertically from the ground weave.

[0009] ​Still another embodiment of the present invention is a method for manufacturing the loop pile towel described above, which comprises sizing for the first time in a cheese (wound yarn) state, sizing for the second time in a yarn state after warping to reinforce with paste, setting the warping speed to 500 m / min or less, and setting the loom rotation speed (the number of times the weft yarn is driven in one minute) to 200 to 350 rpm to manufacture a loop pile towel.

Advantages of the Invention

[0010] The spun yarn for loop pile of the present invention is composed of cotton fibers and does not contain water-soluble fibers. The spun yarn for loop pile is an untwisted or slightly twisted single yarn. Due to the presence of twist spots in the length direction of the yarn, the single fibers are in a migration state where they enter or exit the inside and are twisted on the outside, and there is entanglement between the fibers. Each constituent fiber exists in a free state. Therefore, the pile has good standing property, a soft and bulging texture, and becomes a pile yarn with high properties such as water absorption, washability, and durability. Further, in the loop pile towel of the present invention, the yarn is open from the root to the top of the pile yarn, and stands upright almost vertically from the ground weave. As a result, each constituent fiber exists in a free state, so the pile has good standing property, a soft and bulging texture, and becomes a towel with high properties such as water absorption, washability, and durability.

Brief Description of the Drawings

[0011]

Figure 1

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Figure 12

Mode for Carrying Out the Invention

[0012] The spun yarn for loop pile of the present invention contains cotton fibers. Cotton fibers are excellent in water absorption and have been commonly used for towel fabrics. It does not contain water-soluble fibers such as polyvinyl alcohol (PVA). This is because water-soluble fibers are later dissolved in water and discarded, which not only has the problem of high cost but also the problem of environmental pollution. The spun yarn for loop pile is a single yarn of sirospun yarn, and there are twist marks in the length direction of the yarn. As a result, as described above, the single fibers are in a migration state where they enter and exit the outside and are twisted, there is entanglement between the fibers, and each constituent fiber exists in a free state. Therefore, the pile has good standing property, a soft and bulging texture, and becomes a pile yarn with high properties such as water absorption, washing resistance, and durability.

[0013] Generally, since non-twisted or loosely twisted yarns have few twists, the strength of the yarn is weak and it slips out, making it difficult to wind on a ring spinning machine. However, the spun yarn of the present invention has twist irregularities in the length direction of the yarn, so that the single fibers are in a migration state where they enter or exit the inside and are twisted, and due to the entanglement between the fibers, even without containing water-soluble fibers, it has a strength that can be wound on a ring spinning machine. The twist irregularities can be formed by applying false twists.

[0014] For the spun yarn for loop pile, the twist coefficient K is preferably from 0 to 2.9, more preferably from 0.5 to 2.8, and even more preferably from 1 to 2.9. However, the twist coefficient (K) is calculated by the following formula (Equation 1).

Equation

[0015] The cotton fiber is preferably at least one selected from the group consisting of long fibers and extra-long fibers. Specific examples are the long fibers or extra-long fibers shown in Table 1 below. When it is a long fiber or an extra-long fiber, since there are many crimps and the crimp strength is high, when applied to the sirospun yarn of the present invention, the twist habit and migration of the primary twist tend to remain, the fibers are easily entangled with each other, and since it is a non-twisted yarn or a loosely twisted yarn, each constituent fiber exists in a free state. Therefore, it has good pile formation and becomes a pile yarn with a soft and bulging texture.

[0016]

Table 1

[0017] The cotton fibers constituting the spun yarn for loop pile are preferably arranged in parallel. As a result, when made into a towel product, the surface ground fabric is good, the loops of the loop pile spun yarn can be visually recognized, and it can be judged at a glance that it is a high-quality towel. In addition, since each constituent fiber exists in a free state, the pile has good standing hair properties, a soft and bulging texture, and becomes a pile yarn with high properties such as water absorption, washability, and durability.

[0018] The manufacturing method of the spun yarn for loop pile of the present invention includes the following steps. (1) Sirospun process In the sirospun process, a ring spinning device is used, and a plurality of roving yarns are twisted by a traveler to obtain a spun yarn. At this time, the twist direction of the plurality of roving yarns is reversed from the twist direction of the combined and twisted fine spun yarn to obtain an untwisted or slack-twisted yarn. Preferably, 2 to 3 roving yarns are used as the plurality of roving yarns. (2) False-twist process A false-twisting machine is provided upstream of the traveler that rotates in a ring shape of the ring spinning device, thereby obtaining an untwisted or slack-twisted spun yarn having a twist mark. The false-twisting machine is preferably a friction false-twisting machine, more preferably a friction belt, and as an example, there is a false-twisting machine using an endless rubber belt. A false twist is applied in a direction orthogonal to the combined yarn by the false-twisting machine. In the case of an endless rubber belt false-twisting machine, it contacts the combined yarn twice, and a false twist of S twist - Z twist or Z twist - S twist is applied. The speed of the endless rubber belt is preferably about 0.1 to 10 times the winding speed of the combined yarn, more preferably 0.2 to 8 times, and even more preferably 0.3 to 7 times. (3) Winding process The yarn that has passed through the friction false-twisting machine passes through a traveler that rotates in a ring shape and is wound onto a bobbin.

[0019] The loop pile towel of the present invention has the yarn opening from the root to the top of the pile yarn, and each constituent fiber exists in a free state. Further, the pile yarn stands upright from the ground tissue in a substantially vertical direction. Here, the vertical direction is preferably 75 to 115°, more preferably 70 to 110°, still more preferably 75 to 105°, and most preferably 80 to 100°. The combination of the pile yarn having the opening from the root to the top and standing upright in a substantially vertical direction results in a towel with a soft and bulging texture and high properties such as water absorbency, washability, and durability.

[0020] It is preferable that the pile yarn is intertwined once at the root to form a one-loop standing pile. In the case of a one-loop standing pile, the standing pile structure is stable and it is easy to stand upright from the ground tissue in a substantially vertical direction.

[0021] On the surface of the loop pile towel fabric, it is preferable that the loops of the loop pile spun yarn can be visually recognized. Thereby, it can be determined at a glance that it is a high-quality towel. Further, the cotton fibers constituting the loop pile spun yarn of the loop pile towel are preferably arranged in parallel. Thereby, since each constituent fiber exists in a free state, the pile has good standing property, a soft and bulging texture, and becomes a pile yarn with high properties such as water absorbency, washability, and durability.

[0022] The loop pile towel of the present invention has the following characteristics. (1) There is little hair loss. (2) It is voluminous. (3) It has a large swelling and a fluffy feeling before washing. (4) The swelling is hardly impaired after washing, and washing deterioration hardly occurs. (5) There is little rewetting and it has a comfortable wiping feeling. (6) The residual moisture rate immediately after dehydration is low. Also, the single fibers are in a migration state where they enter or exit the inside and are twisted on the outside, there is entanglement between the fibers, and each constituent fiber exists in a free state. Therefore, the pile has good standing property, a soft and bulging texture, and becomes a towel with high properties such as water absorbency, washability, and durability.

[0023] The manufacturing method of the loop pile towel of the present invention includes the following steps. All are devices for preventing yarn breakage. (1) Sizing (starching) process Perform the first sizing in the cheese (wound yarn) state, and perform the second sizing in the yarn state after warping to starch and reinforce. For the first sizing, it is preferably sized at 85°C for 30 minutes in the cheese (wound yarn) state and dried at 125°C for 30 minutes. For the second sizing, it is preferably immersed in a starch vat at 70°C at a sizing speed of 30 m / min in the yarn state and dried at 140°C for 30 minutes. As the starch component, it is preferable to use an aqueous starch solution with good permeability. (2) Warping speed The warping speed is usually about 700 m / min, but preferably 500 m / min or less, more preferably 400 m / min or less, and even more preferably 350 m / min or less. When the yarn count is 16, the tension during warping is usually about 36 cN, but it is preferably reduced to 30 cN. (3) Loom rotation speed (number of times the weft yarn is driven in one minute) The loom rotation speed is usually 400 rpm, but preferably 200 - 350 rpm. (4) Post-treatment After the towel fabric is woven, it is sun-dried, scoured, dyed, etc. according to the conventional method to obtain a towel fabric.

[0024] The towels of the present invention are suitable for bath towels (after-bath towels), bath towels, face towels, towel handkerchiefs (towel chiefs), disposable towels, wash towels, hand towels, bath mats, sports towels, beach towels (body towels), etc. According to the required properties such as fluff shedding property and water absorbency, appropriately set the blend ratio of the fabric, yarn type, yarn usage, mass per unit (areal density), etc. The control of the areal density can be achieved by changing the pile length (long - short) of the pile yarn to control the areal density (large - small). Here, if the preferable areal density at which the effects of the present invention can be exerted is exemplified, for a thin fabric, the areal density is 100 - 250 g / m 2 and for a medium-thick fabric, the areal density is 250 - 500 g / m 2Those with a basis weight of 500 to 1000 g / m 2 are preferred. Note that those less than 100 g / m 2 are too thin and lack bulk, while those exceeding 1000 g / m 2 are too thick and heavy, neither of which is preferable.

[0025] Also, in the present invention, cotton is the most excellent in terms of the texture, water absorbency, moisture absorbency, and handleability as a towel. However, a small amount of materials such as hemp, rayon, cupra, acetate, and wool may be blended with cotton. Blending with rayon, cupra, or acetate can obtain moisture absorbency, and blending with wool can obtain heat retention. The woven greige is desized in a liquid flow dyeing machine according to the processing steps of cotton, and then scoured under the conventional cotton scouring conditions (constant temperature of 95 to 98 °C, keep time of 50 minutes, dilute caustic soda solution, alcohol ethoxylate added bath). Subsequently, bleaching is carried out under the conventional conditions following scouring (98 °C, 50 minutes, hydrogen peroxide solution). Then, it is dehydrated and set on a tenter for finishing (off-white finish). This bleaching process also undergoes heat treatment. When it is desired to include the crimped yarn of chemical fiber, after expressing the crimp of the false-twisted yarn in the above scouring, it is finished as it is.

[0026] Subsequently, when dyeing following scouring and bleaching, cotton is dyed with reactive dyes (60 to 80 °C, 40 minutes). Also, polyester fibers are dyed with disperse dyes (130 °C, 40 minutes). When dyeing a fabric containing cotton and polyester, in addition to dyeing it in a plain color in two baths, it can also be dyed in different colors or in a mélange (shades) by using disperse dyes and reactive dyes separately. Also, printed processing is possible on the scoured and bleached off-white fabric. In the case of pre-dyed polyester yarn, the crimp can also be expressed simultaneously with scouring with the yarn, and then it is bleached, dyed, and woven to obtain a pre-dyed towel fabric. In the case of pre-dyed cotton yarn, it is scoured, bleached, dyed, and woven to obtain a pre-dyed towel fabric. Thus, in any case, the present invention can achieve excellent commercialization in terms of colorfulness and designability in various dyeings.

[0027] The following will be described with reference to the accompanying drawings. In the following drawings, the same reference numerals denote the same components. FIG. 1 is a schematic perspective view of a sirospun spinning apparatus according to an embodiment of the present invention. In this sirospun spinning apparatus 10, two roving bobbins 11a and 11b are suspended per spindle on a creel (roving supply device), and rovings 12a and 12b supplied from the two roving bobbins 11a and 11b pass through a two-orifice trumpet guide 13 provided upstream of a back roller 14 (on the roving bobbin side) and are sent in parallel to a drafting device 15. The rovings 12a and 12b are respectively drafted between the back roller 14 and an apron 16 and between the apron 16 and a front roller 17 at a predetermined interval to form fleeces 18a and 18b. Then, the fleeces 18a and 18b are spun out from the front roller 17, twisted together to form single yarns of a spun yarn 19, temporarily twisted by a friction belt 25 to impart twist marks in the length direction of the yarn, passed through a snell wire 20, and then passed through a traveler 22 rotating on a ring 21 to apply true twist, and wound onto a bobbin 23. The bobbin 23 is rotated by a drive belt 24. A is an enlarged view of the ring 21 and the traveler 22. For example, the twist directions of the primary twists of the two rovings 12a and 12b are both in the Z direction, the twist application direction by the traveler 22 is in the S direction, and it is twisted in the untwisting direction. Also, the number of twists by the traveler 22 (secondary twist number) is made the same as or more than the number of twists of the primary twist.

[0028] FIG. 2 is a schematic explanatory view of a towel fabric 1 according to an embodiment of the present invention. This towel fabric 1 is composed of warp pile yarns 2a and 2b, a weft yarn 3, and warp ground yarns 4a and 4b, and the warp pile yarns 2a and 2b form loop piles while being locked to a ground weave composed of the weft yarn 3 and the warp ground yarns 4a and 4b. The obtained towel fabric 1 is cut to a predetermined size and subjected to end treatment to become a towel. Figure 3 is a weave diagram of a towel fabric according to one embodiment of the present invention. This weave is a three-pick terry motion weave. The warp pile yarns cross once for every three weft ground yarns. The warp ground yarns G and the warp pile yarns P are arranged alternately. The weft yarns 1 to 3 indicate the order. In Figure 3, as viewed from the warp yarns, black and x indicate floating yarns, and white indicates sinking yarns.

[0029] FIG. 4 is a side view (magnification 100 times) of pile yarn of one embodiment of the present invention (Example 1). As is clear from FIG. 4, there are a lot of twist parts 26 and a little twist parts 27 in the length direction of the yarn, and it is understood that there is twist unevenness. The twist unevenness can be identified by a magnified photograph of about 100 times using an optical microscope. As shown in FIG. 4, there are a lot of twist parts 26 and a little twist parts 27 in the length direction of the yarn, and the lot of twist parts 26 are thin and the little twist parts 27 are thick. The lot of twist parts 26 have a high twist angle relative to the yarn axis and a thin yarn diameter. The little twist parts 27 have a low twist angle relative to the yarn axis and a thick yarn diameter. The lot of twist parts and the little twist parts each preferably have an average length of 0.5 to 10 mm, and more preferably an average length of 1 to 8 mm. In other words, there are a lot of twist parts and a little twist parts in one cotton fiber constituting the pile yarn. As shown in Table 1, the average fiber length of cotton fibers is 26 mm or more, and the high twist and low twist portions are significantly shorter than the average fiber length of cotton fibers. Furthermore, as is clear from Figure 4, the yarn as a whole is bulging.

[0030] 7 is a side view (magnification 30x) of towel fabric according to one embodiment of the present invention (Example 1). This towel fabric is composed of pile yarn 30 and ground fabric 31. The pile yarn 30 crosses once at the base, and the loop portion has open yarn and raised nap. In other words, it is a one-loop raised pile. This shows that the pile has good raised nap and a soft, fluffy texture.

[0031] Figure 10 is a plan photograph (magnification: 10 times) of the towel fabric according to an embodiment (Example 1) of the present invention. The loops are swollen large enough to be visible, neat, and the loops are neatly arranged. The fabric surface is good, and it can be determined at a glance that it is a high-quality towel. In addition, since each constituent fiber exists in a free state, the pile has good hairiness, a soft and bulging texture, and high characteristics such as water absorption, washability, and durability.

Example

[0032] Hereinafter, it will be described more specifically using examples. The present invention is not limited to the following examples. <Evaluation of the texture of the finished towel fabric> (1) Evaluation of soft texture The softness of the texture is determined by the bulk height in the following formula, which is represented by the volume per 1 g of the towel fabric. The higher the value, the softer the texture and the better it is. Note that the thickness was measured according to JIS L-1096 (2010) 8.5 Bulkiness test, and the basis weight was accurately weighed as the weight of 1 m square. The measurement locations were 5 places and represented by their average value. Bulk height (cm 3 / g) = Thickness (mm) / Basis weight (g / m 2 ) × 1000 (2) Evaluation of bulging texture Using a compression measuring instrument for the towel fabric: KES-G5 (manufactured by Kato Tech Co., Ltd.), the towel fabric was compressed at a constant speed to obtain the compression work amount: WC = (gf.cm 2 ). The measurement locations were 5 places and represented by their average value. The WC value is the (energy) when the fabric is compressed. The larger the value, the better the towel is compressed, indicating a large bulge and a high fluffy feeling, which is good. (3) Evaluation of wash durability of the texture The towel fabric was washed 20 times in a washing machine according to JIS L-0217 (1995), Method 103. After drying, the compression work amount: WC = (gf.cm 2) was measured at five locations, and the average value was used to represent it. The smaller the difference in WC value before and after washing, the less the loss of the plump texture due to washing, the more durable, and the better. (4) Evaluation of water drainage property during washing A towel fabric with a width of 35 cm was cut to a length so that its weight became 80 g. Its weight was precisely weighed to one decimal place, and it was immersed in water for 20 minutes. Then, the wet towel fabric was taken out and centrifugally dehydrated in the dehydrator of the washing machine for 4 minutes, and its weight was precisely weighed. The residual moisture rate (%) of the towel fabric was calculated by the following formula. The smaller the value, the better the water drainage property. The better the water drainage property, the faster the subsequent drying rate tends to be. The number of measurements was three points, and the average value was used to represent it. Residual moisture rate of fabric (%) = (Weight of fabric after immersion in water and dehydration (W1)) - (Weight of fabric before immersion in water (W0)) / (Weight of fabric before immersion in water (W0)) × 100 (5) Evaluation of fuzz loss property of towel fabric due to washing Fuzz loss due to washing was measured according to JIS L0217 (1995), Method 103. The fuzz loss rate (%) was calculated by the following formula. The smaller the value, the less fuzz loss, and the better. The number of measurements was five points, and the average value was used to represent it. Fuzz loss rate (%) = (Weight of fuzz shed after washing (g1)) / (Weight of towel before washing (g0)) × 100 (6) Evaluation of water absorbency (modified Laurus method) It was measured five times according to the modified Laurus method of JIS L 1907 (2010), and the average value was obtained. The Laurus index (water absorption index) was calculated according to the following formula. Laurus index (water absorption index) = 2545V × 1411W + 79 V: Maximum water absorption speed (ml / s), W: Water absorption amount at the time of maximum water absorption speed (ml) The higher the value, the more preferably it quickly absorbs the moisture attached to the skin and a large amount of moisture. (7) Water absorption speed (drop method) The water absorption rate of the towel fabric was evaluated based on the dropping method; the burette method of JIS L 1907 (2010). The outline of the test was to drop a single drop of water from a height of 10 cm onto the towel fabric, measure the water absorption time (seconds) when the mirror surface of the water drop disappeared three times, and obtain the average value. The shorter the time, the faster the water absorption and the better it is. <Wetting Return Rate Test Method> The wetting return rate of water is described in Patent Publication No. 6991633 proposed by the applicant of the present application. Water droplets are dropped onto the test specimen of the fabric and absorbed, and the moisture is absorbed with filter paper. The property that the fabric does not release moisture, that is, it is evaluated as the wetting return rate of water. This is a test method that is consistent with the evaluation of the good or bad water absorption felt by people when using fiber fabrics such as towels. The lower the wetting return rate of water, the greater the water absorption of the fabric and the better it can be evaluated. (1) Test Environment, Other Conditions · The test environment was under standard state environment, temperature 20 ± 4°C, relative humidity 65 ± 4%RH. · The filter paper was stored for 24 hours or more under standard state environment, temperature 20 ± 4°C, relative humidity 65 ± 4%RH and used. · The test specimen was stored for 24 hours or more under standard state environment, temperature 20 ± 4°C, relative humidity 65 ± 4%RH and used. · The water to be dropped was at a temperature of 20 ± 15°C, (5 - 35°C). (2) Operation Procedure · The size of Test Specimen 1 of the fiber towel fabric was 10 cm in length and 10 cm in width. Test Specimen 1 was placed on a sample stage (not shown). · As the filter paper, α - cellulose of JIS P 3801 Type 1 standard with a diameter of 110 mm and a thickness of 0.22 mm was used, and the weight of the filter paper was measured. The filter paper manufactured by Advantec Co., Ltd. with the product name "Circular Qualitative Filter Paper No. 1" was used. · Measure 0.8 ml of water volume with a pipette, drop it onto Test Specimen 1, wait for 5 seconds and let Test Specimen 1 absorb the water. · Place the filter paper and place a load of 1.3 kg (1274 Pa) on it. · Wait for 5 seconds and remove the load. · Measure the weight of the filter paper after water absorption. (3) Calculation of the Wetting Return Rate of Water It was calculated by the following formula. W = [(B - A) / A] × 100 However, W: Water wetting return rate (%) A: Weight of filter paper before measurement (g) B: Weight of filter paper after water absorption (g) <Pile standing property of the towel> Observation was made by taking a side photo of the pile portion of the towel fabric with an optical microscope.

[0033] (Example 1) (1) Warp pile yarn The warp pile yarn was produced using the sirospun spinning device shown in Fig. 1. American Pima extra-long fiber was used for the cotton. The twist directions of the primary twists of the two roving yarns 12a and 12b were both in the Z direction, the twisting direction by the traveler 21 was in the S direction, and it was twisted in the untwisting direction. The fineness of the roving yarn was 5 g / 6 yards (9113 decitex), and the Z-direction twist number of the roving yarn was 5 turns / inch (twist coefficient K = 1 in cotton count conversion). The speed of the endless friction belt was made the same as the winding speed of the plied yarn (spun yarn 19). The obtained spun yarn was cotton count 16, twist number 9 turns / inch (twist coefficient K = 2.22), and there were fine twist marks in the longitudinal direction of the yarn. This warp pile yarn was sized for the first time in a cheese state. The sizing agent component used was an aqueous starch solution, and 0.75 g / L of a surfactant containing a higher alcohol as a penetrant was added. Sizing was carried out by the dipping method at 80°C for 30 minutes and dried at 125°C for 30 minutes. The sizing concentration at the first sizing was 0.2 mass%, and the adhesion rate was 0.5 mass%. (2) Warp ground yarn For the warp ground yarn, Indian medium cotton was used as the cotton, and ring-spun yarn 40 double yarn with twist coefficients: lower twist 3.8 and upper twist 2.2 was used. The warp ground yarn was also sized in a cheese state in the same manner as the warp pile yarn. (3) Weft ground yarn For the weft ground yarn, Indian medium cotton was used as the cotton, and ring-spun yarn 20 single yarn with a twist coefficient of 4.0 was used. The weft ground yarn was also sized in a cheese state in the same manner as the warp pile yarn. (4) Warping During warping, the second sizing was carried out in a yarn state. It was immersed in a sizing bath at 70°C at a sizing speed of 30 m / min and dried at 140°C for 30 minutes. As the sizing component, an aqueous starch solution was used, and 5 g / L of polyethylene oxide (PEO) was added as a thickener. The warping speed was 300 m / min, and the tension during warping was 30 cN. The sizing concentration during the second sizing was 2% by mass, and the adhesion rate was 2.1% by mass. (5) Weaving of towel fabric The fabric shown in Figure 2 was woven using a pile loom. The fabric structure is as shown in Figure 3. The loom rotation speed (the number of times the weft yarn is beaten in one minute) was carried out at 250 rpm. The warp density was 46 threads / inch, the weft density was 56 threads / 2 inches, and the areal density was 423 g / m 2 , and the fabric blend ratio was 100% cotton. (6) Scouring and finishing of towel fabric Next, this green fabric was desized in a flow dyeing machine according to the conventional method for cotton processing (55°C × 20 minutes, bath with added amylase and surfactant). Then, it was scoured in the same machine in a bath with added dilute caustic soda and alcohol ethoxylate at 98°C for a holding time of 50 minutes. Then, it was bleached in a hydrogen peroxide bath at 98°C for a holding time of 50 minutes according to the conventional method. Then, as a soft finishing treatment, it was treated in a bath with a softener: Nikka Silicon AQ166, a concentration of 3.3% owf, a temperature of 40°C, and a pH of 4.5 for 20 minutes. After that, it was set on a tenter at a temperature of 135°C and finished (off-white finish). The pile length was 1.13 cm.

[0034] (Comparative Example 1) As the warp pile yarn, the twist directions of the first twists of two thick yarns 12a and 12b were both in the Z direction, and the twisting direction by the traveler 21 was twisted in the Z direction. False twisting was not applied. Otherwise, it was carried out in the same manner as in Example 1. The obtained spun yarn was cotton count 16 single yarn, and the twist coefficient K = 3.2.

[0035] (Comparative Example 2) The warp pile yarn is made by twisting a single yarn of cotton count 16 made of cotton fibers and a single yarn of water-soluble vinylon yarn of 80 counts in the S direction using a twisting machine. During the post-treatment process, the water-soluble vinylon yarn dissolves, and the warp pile yarn of the towel product becomes an untwisted yarn of cotton count 16 single yarn. The twist coefficient K of the twisted yarn was set to 4.0. The above results are shown in Table 2.

[0036]

Table 2

[0037] As is clear from Table 2, the pile yarn of the towel fabric in Example 1 had twist marks in the length direction of the yarn. From this, the following effects could be confirmed. (1) There is little hairiness loss. (2) It is bulky. (3) It has a large swelling and a fluffy feeling before washing. (4) The swelling is hardly impaired after washing, and washing deterioration is less likely to occur. (5) There is little wet regain, and it has a comfortable wiping feeling. (6) The residual moisture rate immediately after dehydration is low. Also, the single fibers are in a migration state where they enter and exit the outside and are twisted, there is entanglement between the fibers, and each constituent fiber exists in a free state. Therefore, it was confirmed that the towel has good pile standing property, a soft and bulging texture, and high properties such as water absorption, washability, and durability.

[0038] Also, as is clear from the side photo of the pile yarn in Example 1 in Figure 4, there are parts 26 with a lot of twist and parts 27 with less twist in the length direction of the yarn, and the yarn is bulging as a whole. On the other hand, Figure 5 is a side photo of the pile yarn in Comparative Example 1, and the yarn is tightened. Figure 6 is a side photo of the pile yarn in Comparative Example 2, and the water-soluble vinylon yarn 29 has bitten into the cotton fiber 28 and the yarn is distorted, and the yarn has no swelling.

[0039] Figure 7 is a side photo of the towel fabric of Example 1 of the present invention. This towel fabric is composed of a pile yarn 30 and a ground weave 31. The pile yarn 30 has the yarns opened, interlaced once at the root, and stands upright almost vertically from the ground weave 31. That is, it is a one-loop upright pile. From this, it can be seen that the pile has good uprightness, a soft and bulging texture is good. On the other hand, Figure 8 is a side photo of the towel fabric of Comparative Example 1. The pile yarn is interlaced twice at the root and in the middle, the loop part has the yarns tightened, and the pile yarn is inclined from the root. Figure 9 is a side photo of the towel fabric of Comparative Example 2, and the pile yarn lies more from the root.

[0040] Figure 10 is a plan photo of the towel fabric of Example 1 of the present invention. The loops are swollen large enough to be visually recognized, neat, the loops are neatly arranged, the fabric surface is good, and it can be judged at a glance that it is a high-quality towel. Also, since each constituent fiber exists in a free state, the pile has good uprightness, a soft and bulging texture, and high properties such as water absorbency, washability, and durability. On the other hand, Figure 11 is a plan photo of the towel fabric of Comparative Example 1, and it can be seen that the loops are small, fine, and tightened. Figure 12 is a plan photo of the towel fabric of Comparative Example 2, and it can be seen that the loops are disordered and lying down.

Industrial Applicability

[0041] The towel fabric of the present invention is also suitable for fabrics such as face towels, bath towels, towel handkerchiefs, sports towels, bathrobes, towel blankets, clothing, socks, carpets, bedding, etc.

Explanation of Reference Numerals

[0042] 1 Towel fabric 2a, 2b Warp pile yarns 3 Weft ground yarn 4a, 4b Warp ground yarns 10 Sirospun spinning device 11a, 11b Coarse yarn bobbins 12a, 12b thick yarn 13 trumpet guide 14 back roller 15 drafting device 16 apron 17 front roller 18a, 18b fleece 19 spun yarn 20 snell wire 21 ring 22 traveler 23 bobbin 24 drive belt 25 friction belt 26 part with more twist 27 part with less twist 28 cotton fiber 29 water-soluble vinylon yarn 30 pile yarn 31 ground weave

Claims

1. A spun yarn for loop pile composed of cotton fibers, containing no water-soluble fibers, wherein the spun yarn for loop pile is an untwisted or slightly twisted single yarn with a twist coefficient K of 0 to 2.9, characterized in that there are twist marks in the length direction of the yarn, there are parts with more twists and parts with fewer twists in the length direction of the yarn, the parts with more twists are thinner, and the parts with fewer twists are thicker. A spun yarn for loop pile. However, the twist coefficient (K) is calculated by the following formula (Equation 1). 【Number 1】 However, t: number of twists (turns / 25.4 mm), S: cotton count (English cotton count)

2. The spun yarn for loop pile according to claim 1, wherein the cotton fiber is at least one selected from the group consisting of long fibers and extra-long fibers.

3. The spun yarn for loop pile according to claim 1, wherein the cotton fibers constituting the spun yarn for loop pile are arranged in parallel.

4. The spun yarn for loop pile according to claim 1, wherein the parts with more twists and the parts with fewer twists each have an average length of 0.5 to 10 mm, and there are parts with more twists and parts with fewer twists within one cotton fiber constituting the pile yarn.

5. A method for manufacturing a spun yarn for loop pile according to any one of claims 1 to 4, characterized in that when drafting and combining a plurality of roving yarns by a sirospun spinning device to form an untwisted or slightly twisted single spun yarn, false twist by a friction belt is applied to impart twist marks in the length direction of the yarn and then wound up. A method for manufacturing a spun yarn for loop pile.

6. A loop pile towel using the spun yarn for loop pile according to any one of claims 1 to 4, wherein the pile yarn of the loop pile towel is an untwisted or slightly twisted single yarn with a twist coefficient K of 0 to 2.9, and the loop pile towel stands upright almost perpendicularly from the ground weave.

7. The loop pile towel according to claim 6, wherein the pile yarn is intertwined once at the root to form a one-loop upright pile.

8. The loop pile towel according to claim 6, wherein the surface of the loop pile towel allows the loops of the loop pile spun yarn to be visible.

9. A method for manufacturing a loop pile towel using the spun yarn for loop pile according to any one of claims 1 to 4, sizing for the first time in a cheese (wound yarn) state, sizing for the second time in a yarn state after warping to reinforce with paste, and setting the warping speed to 500 m / min or less. A method for manufacturing a loop pile towel, wherein the loom rotation speed (the number of times the weft yarn is driven in per minute) is set to 200 to 350 rpm to manufacture the loop pile towel.

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